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    • 专利摘要:
    TEMPERATURE CHANGING TISSUE PAPER PRODUCTS AND COMPOSITIONS PROVIDING A COOLING FEELING Cleaning products, such as facial tissue papers, contain a temperature-changing composition, which can provide a cooling sensation when in contact with a wearer's skin. The temperature change composition is structured emulsion, which may include a phase change material, a vehicle, a surfactant and a crystalline initiator. Phase change materials, in one modality, can exhibit a relatively high heat of fusion. Upon undergoing a phase change, the temperature change composition absorbs heat and thereby provides a cooling feeling or cooling sensation to a wearer's skin.
    公开号:BR112012011935B1
    申请号:R112012011935-4
    申请日:2010-10-08
    公开日:2021-05-18
    发明作者:Jeffery Richard Seidling；Helen Kathllen Moen；Scott W. Wenzel
    申请人:Kimberly-Clark Worldwide, Inc.；
    IPC主号:
    专利说明:

    HISTORIC
    [01] Numerous cosmetic and health care products are applied to the skin in order to provide various benefits. Such products can include, for example, lotions, creams, moisturizers and the like. In some circumstances, the products are intended to provide a cooling sensation or a refreshing sensation to the skin when applied. Existing products typically provide cooling to the skin by combining skin cooling agents with other substances.
    [02] There are several different ways of imparting a cooling sensation to the skin, including the use of evaporation, sensorineural components, or thermodynamic agents such as phase change materials. An example of a cooling agent is menthol, which provides cooling in the form of a physiological or sensorineural effect on nerve endings in the human body, which sense heat. The sensation of coolness from menthol is not due to the latent heat of evaporation, but appears to be the result of direct stimulation to the cold receptors in the nerve endings.
    [03] The use of phase change materials to impart cooling is discussed, for example, in PCT International Publication No. WO 2006/007564 entitled "Cosmetic Compositions and Methods for Sensory Cooling", which is incorporated herein by reference. In the '564 application, a cosmetic skin care composition in the form of a lotion is described which is intended for use in after-sun products, after shave products and body moisturizing products. The lotion is intended to create a cooling sensation on the skin by incorporating components into the lotion that absorb heat from the skin. In particular, ingredients are incorporated into the lotion that absorb heat from the skin and fuse together. The components exhibit a relatively high heat of fusion, which is defined in the '564 application as the heat absorbed per unit mass of a solid chemical element at its melting point in order to convert the solid into a liquid therein. temperature. Application '564 states that the relatively high heat of fusion facilitates the absorption of heat from the skin, to help melt the solid ingredient, as applied to the skin, thereby cooling the skin temperature.
    [04] The application of phase change agents to impart cooling to tissue papers is described, for example, in PCT Patent Application No. PCT/IB2009/051515 Entitled "Tissue Products having a Cooling Sensation When Contacted with Skin". The '515 application describes the application of a phase change agent between multiple layers of a dry tissue paper web with a separate hydrophobic lotion layer on the outer surfaces of the tissue paper product to provide a cooling sensation. This approach is problematic as the components of the hydrophobic lotion can migrate to the hydrophobic phase change agent and disturb its cooling ability. Alternatively, the phase change agent can migrate into the lotion on the outside of the tissue paper and can cause irritation to the skin.
    [05] Therefore, there is a demand for a way to effectively maintain a phase change agent on or within a substrate, such as tissue paper, such that it will cool the skin without allowing irritation to the skin . There is also a demand for a substrate, such as tissue paper, containing the composition, such that the composition can be delivered to the nostril to moisturize, cool and soothe irritated nostrils, while keeping this phase change agent within the substrate, preventing it to irritate the skin. SUMMARY OF THE INVENTION
    [06] In general, dry cleaning products are described and particularly dry substrates, when held against the skin, can provide a cooling sensation. In one embodiment, for example, the substrate could be facial tissue paper. Facial tissue paper can be used to provide comfort to a user's nostrils. For example, when suffering from the common cold, a person's nostrils can become inflamed and irritated. In one embodiment, a tissue paper product is described that can not only be used to clean someone's nostrils, but can also provide the nostrils with a cooling sensation, providing comfort and relief.
    [07] The present invention is also related to a temperature change composition made of a structured emulsion containing a phase change material, a crystalline initiator and a surfactant. The temperature shift composition undergoes a phase shift from a temperature of between about 20°C and 32°C for skin cooling during the use of dry tissue paper or similar dry cleaning product. The use of a structured emulsion helps to transfer the composition to the skin, but limits or eliminates contact of the phase change material with the user's skin and/or transfer to the skin and/or capillary action from the product. Therefore, structured emulsion can reduce irritation and prevent the removal of phase change agents from the product prior to use.
    [08] The structured emulsion, for use with the temperature shift composition, can be selected from several types of structured emulsion, including, but not limited to, an alpha phase emulsion, a cubic (cubic micellar) batch emulsion. , a hexagonal phase emulsion, a lamellar emulsion, a bicontinuous cubic emulsion, a reverse hexagonal emulsion, an inverse cubic emulsion, or a d phase emulsion. Desirably, the structured emulsion is a d-phase emulsion.
    [09] The phase change agent incorporated into the temperature change composition may vary depending on the particular application and the desired result. The phase change agent, for example, can be an oil-soluble, hydrophobic material. Examples of phase change agents include hydrocarbons, waxes, oils, natural butters, fatty acids, fatty acid esters, dibasic acids, dibasic esters, 1-halides, primary alcohols, aromatics, anhydrides, ethylene carbonates, polyalcohols water, and mixtures thereof. In one embodiment, for example, a plurality of phase change agents can be incorporated into the temperature change composition. Particular examples of phase change agents well suited for use in the present invention include tricaprin, paraffin, nonadecane, octadecane, stearyl heptanoate, lauryl lactate, lauryl alcohol, capric acid, caprylic acid, cetyl babassuate, Mangifera stone butter indicates (sleeve); Theobroma cacao kernel butter (cocoa), Bueyrospermum parkii butter, di-C12-C15-alkyl furnarate, stearyl caprylate, cetyl lactate, cetyl acetate, C24-C28-alkylmethicone, glyceryl dilaurate, phosphate chloride of PG-stearamide-propyl dimonium, jojoba esters and combinations thereof.
    [10] The phase change component can be present in an amount between about 1% by weight of the temperature change composition and about 99.9% by weight of the temperature change composition, more desirably between about 20% by weight of the temperature change composition and about 90% by weight of the temperature change composition, and even more desirably between about 50% by weight of the temperature change composition and about 80% by weight of the temperature change composition.
    [11] In an exemplary embodiment, the crystalline initiator is selected from fatty alcohols, fatty acids, esters, sugars, salts, crystalline and microcrystalline waxes, microcrystalline triglycerides and combinations thereof.
    [12] Typically, the crystalline initiator can be present in an amount of between about 0.1% by weight of the temperature shift composition and about 30% by weight of the temperature shift composition, more desirably of about 1 % by weight of the temperature change composition to about 25% by weight of the temperature change composition, and even more desirably from about 2% by weight of the temperature change composition to about 20% by weight of the temperature change composition.
    [13] The temperature change composition also includes a vehicle. Desirably, the vehicle can be selected from water, glycerin, diglycerin, glycerin derivatives, glycols, glycol derivatives, sugars, ethoxylated and/or propoxylated ethers and esters, urea, sodium PCA, alcohols, ethanol, isopropyl alcohol and combinations of the same.
    [14] Typically, temperature shift compositions may contain a carrier in an amount of from about 1% by weight of the temperature shift composition to about 40% by weight of the temperature shift composition, more typically from about from 2% by weight of the temperature change composition to about 25% by weight of the temperature change composition.
    [15] The temperature-changing composition also contains a surfactant. Examples of suitable additional surfactants include, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, zwitterionic surfactants, nonionic surfactants, and combinations thereof. Specific examples of suitable surfactants are known in the art and include those for incorporation into personal care compositions and tissue papers. The temperature change composition may suitably include one or more surfactants in an amount of from about 0.5% by weight of the temperature change composition to about 15% by weight of the temperature change composition, plus desirably from about 1% by weight of the temperature change composition to about 15% by weight of the temperature change composition, and even more desirably from about 2% by weight of the temperature change composition to about 7% by weight of the temperature change composition.
    [16] The dry substrate can be a product that is made from at least one fiber web, such as pulp fibers alone or in combination with synthetic fibers. The temperature shift composition can be present on at least one side of the web.
    [17] Other features and aspects of the present invention are discussed in greater detail below. BRIEF DESCRIPTION OF THE DRAWINGS
    [18] A complete and enabling description of the present invention, including the best mode thereof, for the person skilled in the art is shown more particularly in the remainder of the descriptive report, including reference to the accompanying figures, in which: Figure 1 is a view in perspective of an embodiment of a cleaning product made in accordance with the present invention; Figure 2 is a cross-sectional view of the cleaning product illustrated in Figure 1; Figure 3 is a cross-sectional view of another embodiment of a cleaning product made in accordance with the present invention; and Figure 4 is a perspective view of one embodiment of a spirally wound toilet tissue product produced in accordance with the present invention.
    [19] The repeated use of reference characters in this specification and drawings is intended to represent the same, or similar features or elements of the present invention. DETAILED DESCRIPTION
    [20] It should be understood by one of skill in the art that the present discussion is only a description of exemplary embodiments, and is not intended to be limiting of the broader aspects of the present invention.
    [21] Dry, as used here to describe tissue paper or cleaning products, means that the product is supplied without any moisture other than equilibrium moisture, which is generally associated with the product. “Equilibrium moisture” is the moisture the sheet contains when exposed to environmental conditions for extended periods of time. The equilibrium humidity within the sheet will not change over time at the same relative humidity and temperature. Typically, dry products will have equilibrium moisture contents of less than 15%, such as, less than 10%, such as about 3% to about 8% under most environmental conditions, which are encountered during routine use of the product.
    [22] The heat absorption factor, as used herein, expressed in J/m2, is defined as the product of the heat of fusion of the cooling composition expressed in J/gram and the rate of application of the cooling composition applied to the product. of tissue paper expressed in g/m2.
    [23] Latent heat of fusion and melting points are determined by differential scanning calorimetry (DSC). Melting point, as defined herein, refers to the peak melting mass temperature as determined by DSC. Samples can be analyzed on a TA Instruments DSC 2920 Moduiated DSC (standard cell) using the following experimental procedure: Approximately 5 mg of the respective material was weighed to the nearest 0.1 mg. Samples are processed in the temperature range of -50°C to 100°C with a heating/cooling rate of 10°C/min in an atmosphere of inert gas (N2). The heat of fusion (ΔHf) is computed from the integral under the respective melting peak, with the computed results being the average value from 3 heating/cooling cycles.
    [24] The present invention is generally directed to dry cleaning products, such as dry tissue paper products, which have improved perceived benefits. In particular, cleaning products prepared in accordance with the present invention, when in contact with the skin, can provide a cooling sensation or feeling. A cooling sensation, for example, can provide comfort and a feeling of calm to irritated skin. It is also found that, when used with toilet paper, cooling can evoke a feeling of dampness, which can lead to a perception of improved cleanliness. In one embodiment, the cleanser may be designed to provide a cooling sensation while transferring the composition to the skin, but limiting or eliminating contact of the phase change material from the user's skin.
    [25] In one embodiment, for example, the present invention is directed to a dry cleaning product, such as a facial tissue paper product, that contains a temperature-changing composition. The temperature change composition includes at least one phase change material that undergoes a phase change when raised in temperature. The phase change material, for example, can have a relatively high heat of fusion, which allows it to absorb large amounts of thermal energy and regulate to a temperature lower than ambient. In particular, when the cleaning product is heated, such as being in contact with someone's skin; the phase change material quickly heats up to its melting point. Due to the high heat of fusion, significant amounts of heat can be absorbed while the phase change material is melting. In turn, a cooling sensation is provided to the user's skin.
    [26] Referring to Figure 1, an embodiment of a tissue paper product 10 prepared in accordance with the present invention is shown. The tissue paper product 10 can be any suitable base sheet made from several different types of fiber supplies. The tissue paper product 10 can also be a single layer product or it can contain multiple tissue paper webs laminated together.
    [27] Tissue paper webs, which can be used to make tissue paper product 10, for example, generally can contain pulp fibers either alone or in combination with other fibers. Each tissue paper web can generally have a specific volume of at least 2 cm3/g, such as at least 3 cm3/g.
    [28] Fibers suitable for preparing tissue paper webs contain any natural or synthetic cellulosic fibers including, but not limited to, non-wood fibers such as cotton, Manila hemp, kenaf, Babai grass, flax, esparto grass, straw, jute, hemp, bagasse, skipper yarn fibers and pineapple leaf fibers; and wood or pulp fibers such as those obtained from deciduous or coniferous trees, including softwood fibers such as northern and southern softwood kraft fibers; hardwood fibers such as eucalyptus, maple, birch and birch. Pulp fibers can be prepared in high-yield or low-yield forms and can be pulped in any known method, including the high-yield pulping methods kraft, sulfite and other known pulping methods. Fibers prepared from organosolv pulping methods can also be used, including the fibers and methods described in U.S. Patent No. 4,793,898 issued December 27, 1988 to Laamanen, et al.; in U.S. Patent No. 4,594,130 issued June 10, 1986 to Chang, et al.; and U.S. Patent No. 3,585,104 issued June 15, 1971 to Kleinert. Useful fibers can also be produced by pulping with anthraquinone, exemplified by U.S. Patent No. 5,595,628, issued January 21, 1997 to Gordon, et al.
    [29] A portion of the fibers, such as up to 50% or less by dry weight, or from about 5% to about 30% by dry weight, can be made up of synthetic fibers such as rayon, polyolefin fibers, polyester fibers, bicomponent core-wrap fibers, multicomponent binder fibers, and the like. An exemplary polyethylene fiber is Pulpex®, available from Hercules, Inc. (Wilmington, DE). Any known bleaching method can be used. Types of synthetic cellulose fibers include rayon in all its varieties and other fibers made from viscose or cellulose chemically. modified. Chemically treated natural cellulosic fibers can be used as mercerized pulps, chemically stiffened or crosslinked fibers or sulphonated fibers. For good mechanical properties, when using papermaking fibers, it may be desirable for the fibers to be relatively undamaged and largely unrefined or only slightly refined. Although recycled fibers can be used, virgin fibers are generally useful for their mechanical properties and lack contaminants. Mercerized fibers, regenerated cellulosic fibers, cellulose produced by microbes, rayon and other cellulosic material or cellulosic derivatives can be used. Suitable papermaking fibers can also include recycled fibers, virgin fibers or mixtures thereof. In certain modalities capable of high apparent volume and good compressive properties, the fibers may have a Canadian Standard Freeness of at least 200, more specifically, at least 300, more specifically, at least 400, and, very specifically, of at least 500.
    [30] Other papermaking fibers that can be used in the present invention include broken or recycled fibers and high-yield fibers. High-yield pulp fibers are those papermaking fibers produced by pulping processes providing a yield of about 65% or greater, more specifically, about 75% or greater, and even more specifically, about 75% to about 95%. Yield is the resulting amount of processed fibers expressed as a percentage of the initial wood mass. Pulping processes include bleached chemothermomechanical pulp (BCTMP), chemothermomechanical pulp (CTMP), thermomechanical pressure/pressure pulp (PTMP), thermomechanical pulp (TMP), chemical thermomechanical pulp (TMCP), high yield sulfite pulps, and High-yield kraft pulps, all of which leave the resulting fibers with high levels of lignin. High yield fibers are well known for their stiffness in both dry and wet states relative to typical chemically pulped fibers.
    [31] In general, any process capable of forming a tissue paper web can also be used in the present invention. For example, a papermaking process of the present invention may utilize creping, wet creping, double creping, embossing, wet compression, air compression, air drying, air creping drying, air drying non-crepe, hydroentanglement, air dispersion, as well as other steps known in the art.
    [32] The tissue paper web can be formed from a supply of fibers containing pulp fibers in an amount of at least about 50% by weight, such as at least about 60% by weight, such as from at least about 70% by weight, such as about 80% by weight, such as at least about 90% by weight, such as 100% by weight.
    [33] Also suitable for products of the present invention are tissue paper sheets that are densified or pattern-printed, such as tissue paper sheets described in any of US Patent Nos: 4,514,345 issued April 30, 1985 to Johnson, et al.; 4,528,239 issued July 9, 1985 to Trokhan; 5,098,522 issued March 24, 1992 to Smurkoski, et al.; 5,260,171 issued November 9, 1993 to Smurkoski, et al.; 5,275,700 issued January 4, 1994 to Trokhan; 5,328,565 issued July 12, 1994 to Rasch, et al.; 5,334,289 issued Aug. 2, 1994 to Trokhan, et al.; 5,431,786 granted on July 11, 1995 to Rasch, et al.; 5,496,624 issued March 5, 1996 to Steltjes, Jr., et al.; 5,500,277 issued March 19, 1996 to Trokhan, et al. 5,514,523 issued May 7, 1996 to Trokhan, et al.; 5,554,467 issued September 10, 1996 to Trokhan, et al.; 5,566,724 issued October 22, 1996 to Trokhan, et al.; 5,624,790 issued April 29, 1997 to Trokhan, et al.; and 5,628,876 issued May 13, 1997 to Ayers, et al., the disclosures of which are incorporated herein by reference to the extent that they are not contradictory with the present invention. Such printed fabric sheets may have a network of densified regions, which have been printed against a drum dryer by a printing fabric, and regions which are relatively less densified (eg, "domes" in the tissue paper sheet) corresponding to deflection conduits in the printing fabric, with the tissue paper sheet superimposed over the deflection conduits, was deflected by an air pressure differential across the deflection conduit to form a low-density pillow-like region or dome in the sheet of paper sheet.
    [34] Tissue paper web can also be formed without a substantial amount of internal fiber-to-fiber bond strength. In this regard, the fiber supply used to form the base web can be treated with a chemical debonding agent. The debonding agent can be added to the fiber slurry during the pulping process or it can be added directly to the headbox. Suitable desizing agents, which can be used in the present invention, include cationic desizing agents, such as quaternary amine salts of fatty dialkyls, tertiary amine salts of fatty monoalkyls, primary amine salts, quaternary imidazoline salts, quaternary salt of silicone and unsaturated fatty alkyl amine salts. Other suitable debonders are described in U.S. Patent No. 5,529,665 issued June 25, 1996 to Kaun, which is incorporated herein by reference. In particular, the '665 patent to Kaun describes the application of cationic silicone compositions as debonding agents.
    [35] In one embodiment, the debonding agent used in the process of the present invention is an organic quaternary ammonium chloride, and particularly a silicone-based amine salt of a quaternary ammonium chloride. For example, the debonding agent may be PROSOFT® TQ1003 marketed by Hercules Corporation. The debonding agent can be added to the fiber slurry in an amount of from about 1 kg per metric ton to about 10 kg per metric ton of fibers present within the slurry.
    [36] In an alternative embodiment, the debonding agent can be an imidazoline-based agent. The imidazoline-based debonding agent can be obtained, for example, from Witco Corporation (Greenwich, CT). The imidazoline-based debonding agent can be added in an amount of between 2 kg per metric ton and about 15 kg per metric ton.
    [37] In one embodiment, the debonding agent can be added to the fiber supply in accordance with a process as described in PCT Application having International Publication No. WO 99/34057, filed December 17, 1998, or in the Application Published PCT having International Publication No. WO 00/66835, filed April 28, 2000, both of which are incorporated herein by reference. In the above publications, a process is described, in which a chemical additive, such as a debonding agent, is adsorbed onto cellulosic papermaking fibers at high levels. The process includes the steps of treating a fiber slurry with an excess of the chemical additive, allowing sufficient residence time for adsorption to occur, filtering the slurry to remove unadsorbed chemical additives, and redispersion of the pulp filtered with fresh water before the formation of a non-woven web.
    [38] Optional chemical additives can also be added to the aqueous papermaking supply or web. embryo formed, to confer additional benefits to the product and process and are not antagonistic to the intended benefits of the dry substrate. The following materials are included as examples of additional chemicals, which can be applied to the web in conjunction with the temperature-changing composition. Chemicals are included as examples and are not intended to limit the scope of the invention. Such chemicals can be added at any point in the papermaking process, including being added simultaneously with the additive composition in the pulpmaking process where the additive or additives are directly combined with the additive composition.
    [39] Additional types of chemicals that can be added to the paper web include, but are not limited to, absorbance aids usually in the form of cationic, anionic or non-phonic surfactants, wetting agents and plasticizers such as poly(ethylene glycols) of low molecular weight and polyhydroxy compounds such as glycerine and propylene glycol. Materials that provide health benefits to the skin, such as mineral oil, aloe extract, vitamin E, silicone, general lotions, and the like, can also be incorporated into finished products.
    [40] In general, the products can be used in conjunction with any known materials and chemicals that are not antagonized by their intended use. Examples of such materials include, but are not limited to, odor control agents such as odor absorbers, activated carbon fibers and particles, baby powder, baking soda, chelating agents, zeolites, perfumes or other masking agents , cyclodextrin compounds, oxidants and the like. Superabsorbent particles, synthetic fibers or films can also be used. Additional options include colorants, optical brighteners, humectants, emollients and the like.
    [41] Tissue paper webs, which can be treated with the temperature-shifting composition, can include a single homogeneous fiber layer or can include a layered or laminated construction. For example, the tissue paper web layer can include two or three layers of fibers. Each layer can have a different fiber combination.
    [42] Each of the fiber layers contains a dilute aqueous suspension of papermaking fibers. The particular fibers contained in each layer generally depend on the product being formed and the desired results. In one embodiment, for example, a middle layer contains southern softwood kraft fibers, either alone or in combination with other fibers, such as high-yield fibers. The outer layers, on the other hand, can contain softwood fibers, such as northern softwood kraft fibers.
    [43] In an alternative embodiment, the middle layer may contain softwood fibers for strength, while the outer layers may contain hardwood fibers, such as eucalyptus fibers, for perceived softness.
    [44] The weight of tissue paper webs may vary depending on the final product. For example, the process can be used to produce facial tissue papers, toilet tissue papers, paper towels, industrial cleaners, and the like. In general, the grammage of tissue paper products can range from about 10 g/m2 to about 80 g/m2, such as from about 20 g/m2 to about 60 g/m2. For tissue and facial tissue, for example, the weight can range from about 10 g/m2 to about 60 g/m2. For paper towels, on the other hand, the weight can range from about 25 g/m2 to about 80 g/m2.
    [45] The apparent volume of tissue paper web can also range from about 2 cm3/g to 20 cm3/g, such as from about 5 cm3/g to 15 cm3/g. Sheet “apparent volume” is calculated as the quotient of the gauge of a sheet of dry tissue, expressed in micrometers, divided by the dry weight, expressed in .grams per square meter. The resulting apparent leaf volume is expressed in cubic centimeters per gram. More specifically, caliper is measured as the total thickness of a stack of ten representative sheets and dividing the total thickness of the stack by ten, with each sheet within the stack being placed with the same side facing up. Caliper is measured according to TAPPI test method T411 om-89 “Thickness (caliper) of Paper, Paperboard, and Combined Board” with Note 3 for stacked sheets. The micrometer used to perform the T411 om-89 is an Emveco 200-A Tissue Caliper Tester, available from Emveco, Inc. (Newberg, OR). The micrometer had a load of 2.00 Kilopascal (132 grams per square inch), a pressure foot area of 2,500 square millimeters, a pressure foot diameter of 56.42 millimeters, a dwell time of 3 seconds, and a rate of decrease of 0.8mm per second.
    [46] In products with multiple layers, the weight of each tissue paper web present in the product may also vary. In general, the total grammage of a multilayer product will typically be the same as indicated above, such as from about 20 g/m2 to about 80 g/m2. Therefore, the grammage of each layer can be from about 5 g/m2 to about 60 g/m2, such as from about 10 g/m2 to about 40 g/m2. In accordance with the present invention, tissue paper product 10 contains a temperature shift composition to impart a cooling sensation to a wearer's skin.
    [47] The temperature shift composition, to impart a cooling sensation to a wearer's skin, is constructed of a structured emulsion containing a phase shift material, a crystalline initiator, a vehicle and a surfactant. The temperature change composition undergoes a phase change at a temperature between about 20°C and 32°C for cooling the skin during the use of dry tissue paper or similar dry cleaning product. Phase change materials are known to cause irritation as they easily penetrate the skin. The use of a structured emulsion helps to transfer the composition to the skin, but limits or eliminates the contact of the phase change material with the user's skin and/or the transfer to the skin and/or the capillary action from the product. . Therefore, structured emulsion can reduce irritation caused by phase change materials from the product before use.
    [48] The structured emulsion, for use with the phase change composition, can be selected from several types of structured emulsion, including, but not limited to, an alpha phase emulsion, a batch cubic (cubic micellar) emulsion. , a hexagonal phase emulsion, a lamellar emulsion, a bicontinuous cubic emulsion, a reverse hexagonal emulsion, an inverse cubic emulsion and a d phase emulsion.
    [49] To achieve cooling sensation delivery, a temperature shift composition is desirably in the form of an oil phase dispersed in a single-phase cubic liquid crystal or concentrated "d-phase" emulsion. Preferably, the oil phase is present in the composition in an amount of 50-100%, more preferably 6090% and most preferably 65-85%. The amount of oil added is at a desired level when the emulsion micelles shift from a spherical shape to a more polygonal shape. In other words, the droplets increase in size by packing internally, such that they push against each other and that, at the point of contact with adjacent micelles, the pressure exerted creates an equilibrium plateau rather than the normal curvature expected in a micellar sphere.
    [50] Structured emulsions, such as d-phase emulsions, are well known in the art. However, it is known that d-phase emulsions are efficient in delivering actives and molecules into the skin. For example, the interaction between the liquid crystalline phase and skin lipids is known to enhance transdermal delivery of a lipophilic entity, octadecenedioic, within a crystalline emulsion. (Otto, A., Du Plessis, J. and Weichers, J, W. Formulation effects of topical emulsions on transdermal and dermal delivery. Intl. J. of Cosmetic Science. 31, 11-12 (2009). Therefore, it would be expected that by including a hydrophobic phase change material within a d phase emulsion would provide better transfer of the phase change material and would cause greater irritation.
    [51] However, the use of a temperature-changing composition comprising a structured emulsion, such as a d-phase emulsion, disclosed here, aids the transfer of the composition to the skin, but unexpectedly limits or eliminates contact with the skin. phase change material with the user's skin and/or transfer to the skin and/or capillary action from the product. As evidenced by the Examples discussed here, the use of a crystalline initiator within the d-phase emulsion provides a temperature-changing composition that is cooling but not irritating the skin. Therefore, structured emulsion can reduce irritation and prevent the removal of phase change agents from the product prior to use. With prior temperature shift compositions disclosed, for example, in PCT Patent Application No:. PCT/IB2009/051515 entitled “Tissue Products having a Cooling Sensation When Contacted with Skin”, the phase change materials transfer to the skin and cause irritation.
    [52] The temperature shift composition can be incorporated into the tissue paper product 10 using any suitable method or technique. For example, the temperature change composition can be sprayed over the tissue paper product, extruded over the tissue paper product, or printed over the tissue paper product using, for example, flexographic printing, tissue printing. direct engraving or indirect engraving printing. In yet another embodiment, the temperature shift composition can be applied to the tissue paper product using any suitable coating equipment, such as a knife coater, a UFD coater or slit coated. Since the temperature shift composition is solid at room temperature, in one embodiment it may be desirable to melt the composition prior to application to the tissue paper web. The application of such fused materials to a finished paper web web is well known in the art. Sometimes, it may also be advantageous to cool the web directly after application of the molten phase change material, especially when the treated product is wound onto a spiral wound roll either to a finished product or for further processing. Cooling the web below the melting point of the phase change material reduces the potential for the spirally wound web to become “locked”. As used herein, "blocked" refers to the tendency of sheets that turn adjacently on the spirally wound roll to stick together and restrict the ability to unwind the web from the spirally wound roll.
    [53] The temperature change composition includes at least one phase change material that undergoes a phase change when heated, which in turn provides a cooling sensation to the skin. In general, a phase change material includes any substance that has the ability to absorb or release thermal energy to reduce or eliminate heat flux in or within a temperature stabilization range. The temperature stabilization range can include a particular transition temperature or transition temperature range. A phase change material used will preferably be capable of altering a thermal energy flux during a time during which the phase change material is absorbing or releasing heat, typically when the phase change material undergoes a transition between two states (eg, liquid and solid states, liquid and gas states, solid and gas states, or two solid states). This action is typically transient, meaning it will occur until latent heat from the phase change material is absorbed or released during the heating or cooling process. Thermal energy can be stored in or removed from the phase change material, and the phase change material typically can be effectively recharged by a source of heat or cold. The temperature change compositions exhibit a phase change at temperatures between about 23°C and about 35°C, such as is suitable for use in cooling the skin. In other embodiments, materials can be chosen with transition temperatures between about 23°C and about 32°C, between about 26°C and about 32°C, or within any suitable range. The phase change temperature is selected such that the phase change occurs between the product's ambient temperature and the user's external skin temperature.
    [54] The temperature change composition may contain a mixture of phase change materials that exhibit a mixture of transition temperatures. When a mixture of phase change materials is used, the components can be selected so as to have a collective melting point within the limits mentioned above. In some cases, the melting points of the individual phase change materials comprising the temperature change composition may fall outside the melting point limits for the phase change temperature of the temperature change composition. However, the mixture of phase change materials will exhibit a phase change within the desired temperature limits. When the temperature-changing composition is held against the skin, either directly or indirectly, the composition heats to skin temperature from room temperature. The phase change material then melts at its specified phase change temperature. Fusion requires heat, which is removed from the skin, giving a feeling of cooling. Once the material is molten, the feeling of cooling dissipates. By having a range of phase change temperatures (melting points in this case) of the phase change materials, one can extend the range of temperatures at which cooling is felt. In one example, a combination of phase change materials, having phase change temperatures at 18°C, 26°C and 35°C, are combined to create a temperature change composition having a melting point between 23° C and 32°C.
    [55] Suitable phase change materials include, by way of example and not limitation, encapsulated phase change powder (eg LURAPRET, an encapsulated paraffin available from BASF and MPCM 43-D available from Microtek Laboratories), hydrocarbons (eg straight chain alkanes or paraffinic hydrocarbons, branched chain alkanes, unsaturated hydrocarbons, halogenated hydrocarbons and alicyclic hydrocarbons), waxes, natural butters, fatty acids, fatty acid esters, dibasic acids, dibasic esters, 1-halides, primary alcohols, aromatics, anhydrides (eg stearic anhydride), ethylene carbonate, polyhydric alcohols (eg 2,2-dimethyl-1,3-propanediol, 2-hydroxy-methyl-2-methyl-1 ,3-propane-diol, pentaerythritol, dipentaerythritol, pentaglycerin, tetramethylol ethane, neopentyl glycol, tetramethylol propane, monoamino-pentaerythritol, diamino-pentaerythritol and tris(hydroxymethyl)acetic acid, polymers (eg plo, polyethylene, poly(ethylene glycol), polypropylene, polypropylene glycol, poly(tetramethylene glycol), and copolymers such as polyacrylate or poly(meth)acrylate with an alkyl hydrocarbon side chain or with a poly(ethylene glycol) side chain and copolymers comprising polyethylene, poly(ethylene glycol), polypropylene, poly(propylene glycol) or poly(tetramethylene glycol), and mixtures thereof. Two well-suited phase change materials are stearyl heptanoate and n-octadecane. Other desirable phase change materials include tricaprin, paraffin, nonadecane, octadecane, stearyl heptanoate, lauryl lactate, lauryl alcohol, capric acid, caprylic acid, cetyl babassuate, Mangifera indica stone butter (mango), stone butter from Theobroma cacao (cocoa), Butyrospermum Parkii butter, di-C12-C15-alkyl fumarate, stearyl caprylate, butyl lactate, cetyl acetate, C24-C28-alkyl-methicone, glyceryl dilaurate, chloride-phosphate PG-stearamido-propyl dimonium, jojoba esters and combinations thereof.
    [56] As described above, in one embodiment, the temperature change composition may contain a mixture of two or more phase change materials. In a particular embodiment, the temperature change composition contains one. mixture of stearyl heptanoate and n-octadecane.
    [57] Phase change materials can include phase change materials in an unencapsulated form and phase change materials in an encapsulated form. A phase change material in a non-encapsulated form can be supplied as a solid in a variety of forms (eg bulk form, powders, pellets, granules, flakes, paste and so on) or as a liquid. in a variety of forms (eg, molten form, dissolved in a solvent, and so on).
    [58] Another aspect of temperature change compositions is the heat of fusion of the temperature change composition comprising the phase change materials. The temperature change compositions can have melting heats of at least 100 J/g, such as at least about 120 J/g, such as at least about 145 J/g, such as 165 J/g, such as at least 190 J/g. For example, in one embodiment, the temperature change composition contains a hydrocarbon as the phase change material, such as a straight chain hydrocarbon. The hydrocarbon may contain, for example, more than 12 carbon atoms in the chain, such as from about 18 carbon atoms to about 19 carbon atoms in the chain. Particular examples of phase change materials include, for example, octadecane (melting heat of about 213 J/g), nonadecane, stearyl heptanoate, and mixtures thereof.
    [59] Phase change materials can be contained in the temperature change composition in an amount of from about 1% by weight of the temperature change composition to 99% by weight of the temperature change composition, such as about from 5% by weight of the temperature change composition to about 90% by weight of the temperature change composition. For example, in particular embodiments, the phase change materials can be present in the temperature change composition in an amount from about 50% by weight of the temperature change composition to about 80% by weight of the temperature change composition. temperature.
    [60] Desirably, the crystalline initiator is selected from fatty alcohols, fatty acids, esters, sugars, salts, crystalline and microcrystalline waxes, microcrystalline triglycerides and combinations thereof.
    [61] Typically, the crystalline initiator is present in an amount between about 0.1% by weight of the temperature shift composition and about 20% by weight of the temperature shift composition, more typically about 1% by weight of the temperature change composition to about 15% by weight of the temperature change composition, and even more typically from about 2% by weight of the temperature change composition to about 10% by weight of the composition of temperature change.
    [62] As discussed above, the temperature change composition includes a vehicle. Desirably, the vehicle is selected from water, glycerin, diglycerin, glycerin derivatives, glycols, glycol derivatives, sugars, ethoxylated and/or propoxylated ethers and ethers, urea, sodium PCA, alcohols, ethanol, isopropyl alcohol or combinations of the same.
    [63] Typically, temperature shift compositions contain a carrier in an amount of from about 1% by weight of the temperature shift composition to about 40% by weight of the temperature shift composition, more typically from about 2% by weight of the temperature change composition to about 25% by weight of the temperature change composition.
    [64] The temperature-changing composition also contains a surfactant. Examples of suitable surfactants to form a structured emulsion include sugar esters and derivatives thereof, sucrose esters, polyglyceryl esters, sorbitan esters, fatty acid esters, alkyl polyglycosides, and combinations thereof. Desirable surfactants include sorbitan stearate, sorbityl laurate, sucrose palmitate, sucrose cocoate, cetearyl olivate, sorbitan olivate, cetaryl-glycoside, coco-glycoside, myristyl-glycoside, isostearyl-glycoside, and combinations thereof. The temperature shifting composition may suitably include one or more surfactants in an amount of from about 0.5% by weight of the temperature shifting composition to about 15% by weight of the temperature shifting composition.
    [65] Typically, the temperature change composition is thermally reversible. Therefore, the temperature change composition is such that below a transition temperature, the composition exists in a solid or hard gel state. At a temperature of at least 50°C, the composition exists in a flowable gel state, but maintains a viscosity range of about 500 cps to about 20,000 cps, more desirably a range of about 1000 cps to about 10,000, more desirably, a range from about 2,000 cps to about 6,000 cps.
    [66] Having a thermally reversible temperature change composition is very important. A temperature shift composition that is thermally reversible allows the product to be exposed to extreme temperatures during product shipment and still function effectively in the home when used by the consumer. The thermally reversible temperature shift composition described herein will change from a solid state to a liquid state and will return to a solid state as temperatures change. Therefore, phase change materials to provide a cooling effect are still available after long periods of storage and transport at various temperatures. Prior temperature change compositions disclosed, for example, in PCT Patent Application No. PCT/IB2009/051515 entitled "Tissue Products having a Cooling Sensation When Contacted with Skin" are not thermally reversible and do not provide such benefits.
    [67] The temperature change composition uses a phase change material to provide a measurable cooling benefit, but it also uses a delivery vehicle such that the phase change material is trapped within an emulsion so that it can cool and not irritate the skin. It consists of two distinctly different phases, a dispersed phase and a continuous phase, emulsified together to create a d-phase emulsion.
    [68] To prepare the temperature change composition described herein, a continuous phase is prepared by mixing together a surfactant and vehicle. A phase change material is mixed together with a crystalline initiator to prepare a second phase. The second phase is added to the continuous phase and the second phase is dispersed within the continuous phase.
    [69] Because oil is the internal phase of the d-phase emulsion, the temperature-changing composition has increased absorbance when applied to the substrate. The temperature-changing composition can incorporate water from secretions into the polar phase of the emulsion. Therefore, absorption of water and similar watery secretions is almost instantaneous. Typically, tissue paper products dried using the temperature shift compositions can absorb a single drop of water placed on the treated side of the tissue paper within 90 seconds, within 60 seconds, within 45 seconds, more typically absorbing a single drop of water within 30 seconds, and even more typically, absorbing a single drop of water within 20 seconds.
    [70] Additionally, in production, cleaning the machinery and workplace used to produce tissue paper with traditional lotion can be time-consuming as formulations form a waxy solid at temperatures below their melting points (typically < 50-60°C), which need to be scraped or melted off the surfaces or otherwise removed. The temperature change composition contains a hydrophilic phase in addition to the hydrophobic phase. Therefore, the temperature-changing composition can be easily cleaned with water and minimal labor.
    [71] Another important factor is the heat absorption factor of the products. The heat absorption factor, expressed in J/m2, is the product of the heat of fusion of the temperature change composition, expressed in J/g, and the application rate of the temperature change composition applied to the tissue paper product , expressed in grams per square meter (g/m2). The heat absorption factor of the products can be at least about 500 J/m2 such as at least 1000 J/m2 such as from about 1000 J/m2 to about 4000 J/m2 or greater. For many applications, the temperature change composition can be applied to a tissue paper web such that the phase change materials are present in the web in an amount of from about 4 g/m2 to about 40 g/m2.
    [72] The temperature-changing composition can take a variety of forms, including, without limitation, aqueous solutions, gels, balms, lotions, suspensions, creams, milks, salves, ointments, sprays, foams, solid sticks, and the like .
    [73] Furthermore, as typical lotion tissue papers consist primarily of oils and waxes, it is difficult, if not impossible, to incorporate skin health ingredients of a hydrophilic nature into the formulation in adequate amounts to see the benefit. associated with the ingredients. The temperature-changing composition can include skin health ingredients, either hydrophilic or hydrophobic, as it contains both a hydrophilic continuous phase and a hydrophobic dispersed phase within the emulsion.
    [74] Examples of other skin health ingredients that may be included within the temperature change composition are emollients, sterols or sterol derivatives, natural and synthetic fats or oils, viscosity enhancers, rheology modifiers, polyols , surfactants, alcohols, esters, silicones, clays, starch, cellulose, particulates, moisturizers, film formers, slip modifiers, surface modifiers, skin protectors, humectants, sunscreens, anti-wrinkle actives, smoothing agents, antioxidants, and the similar ones.
    [75] Therefore, temperature shift compositions optionally can additionally include one or more emollients, which typically act to soften, smooth and otherwise lubricate and/or moisturize the skin. Suitable emollients which can be incorporated into the compositions include oils such as natural oils such as jojoba, sunflower, saffron, and the like, synthetic base oils such as petrolatum, mineral oils, alkyl dimethicones, alkyl -methicones, alkyl-dimethicone copolyols, phenyl-silicones, alkyl-trimethyl-silanes, dimethicone, cross-linked polymers of dimethicone, cycloureticone, lanolin and its derivatives, glycerol esters and derivatives, propylene glycol esters and derivatives, esters and derivatives of fatty acids, alkoxylated carboxylic acids, alkoxylated alcohols, and combinations thereof.
    [76] Ethers such as eucalyptol, cetearyl glycoside, polyglyceryl-3 cetyl dimethyl isosorbic ether, polyglyceryl-3 decyl-tetradecanol, propylene glycol myristyl ether, and combinations thereof, may also be suitably used as emollients.
    [77] The temperature shift composition can include one or more emollients in an amount from about 0.01% by weight of the temperature shift composition to about 70% by weight of the temperature shift composition, more desirably, from about 0.05% by weight of the temperature change composition to about 50% by weight of the composition of. temperature change, and even more desirably from about 0.1% by weight of the temperature change composition to about 40% by weight of the temperature change composition.
    [78] Optionally, one or more viscosity enhancers may be added to the temperature shift composition to increase viscosity to help stabilize the composition, such as when the composition is incorporated into a personal care product, hereby reducing makeup migration, and to improve transfer to the skin. Suitable viscosity enhancers include polyolefin resins, lipophilic/oil thickeners, polyethylene, silica, silica silylate, silica methyl silylate, colloidal silicon dioxide, cetylhydroxy-ethyl-cellulose, other organically celluloses. modified, PVP/decane copolymer, crosslinked PVM/MA decadiene polymer, PVP/eicosene copolymer, PVP/hexadecane copolymer, clays, carbomers, acrylate-based thickeners, surfactant thickeners, and combinations thereof.
    [79] The temperature shift composition may desirably include one or more viscosity enhancers in an amount from about 0.01% by weight of the temperature shift composition to about 25% by weight of the temperature shift composition, more desirably from about 0.05% by weight of the temperature change composition to about 10% by weight of the temperature change composition, and even more desirably from about 0.1% by weight of the temperature change composition. temperature shift at about 10% by weight of the temperature shift composition.
    [80] The temperature shift composition optionally may additionally contain rheology modifiers. Rheology modifiers can help to increase the viscosity at the melting point of the composition so that the composition readily remains on the surface of a personal care product.
    [81] Suitable rheology modifiers include combinations of alpha olefins and styrene alone or in combination with mineral oil or petrolatum, combinations of difunctional alpha olefins and styrene alone or in combination with mineral oil or petrolatum, combinations of alpha olefins and isobutene alone or in combination with mineral oil or petrolatum, ethylene/propylene/styrene copolymers alone or in combination with mineral oil or petrolatum, humectant/ethylene/styrene copolymers alone or in combination with mineral oil or petrolatum, ethylene/acetate copolymers vinyl, polyethylene polyisobutylenes, polyisobutenes, polyisobutylene, dextrin palmitate, dextrin ethylhexanoate palmitate, stearoyl-inulin, stearalkonium bentonite, distearadmonium hectorite, and stearalkonium hectorite, styrene/butadiene copolymers styrene/isoprene/styrene, styrene-ethylene/humectant-styrene copolymers, styrene copolymers ethylene-propylene-styrene, n-polymers (styrene-butadiene), n-polymers of (styrene-isoprene), styrene-butadiene copolymers, and styrene-ethylene/propylene copolymers, and combinations thereof. Specifically, rheology enhancers such as mineral oil and ethylene/propylene/styrene copolymers and mineral oil and humectant/ethylene/styrene copolymers are particularly desirable.
    [82] The temperature shift composition may suitably include one or more rheology modifiers in an amount from about 0.1% by weight of the temperature shift composition to about 10% by weight of the temperature shift composition.
    [83] The temperature change composition optionally can additionally contain humectants. Examples of suitable humectants include glycerin, glycerin derivatives, 1,3-propane-diol, sodium hyaluronate, betaine, amino acids, glycosaminoglycans, honey, sugar alcohols, sorbitol, glycols, polyols, sugars, hydrogenated starch hydrolysates, salts of PCA, lactic acid, lactates and urea. A particularly preferred humectant is glycerin. The temperature shifting composition may suitably include one or more humectants in an amount of from about 0.05% by weight of the temperature shifting composition to about 50% by weight of the temperature shifting composition.
    [84] The temperature shift composition of the invention optionally may additionally contain film formers. Examples of suitable film formers include lanolin derivatives (e.g., acetylated lanolins), superfatty oils, cyclomethicone, cyclopentasiloxane, dimethicone, synthetic and biological polymers, proteins, quaternary ammonium materials, starches, gums, cellulosic entities, polysaccharides, albumin, acrylate derivatives, IPDI derivatives, and the like. The composition may suitably include one or more film formers in an amount of from about 0.01% by weight of the temperature shifting composition to about 20% by weight of the temperature shifting composition.
    [85] The temperature shift composition optionally can additionally contain slip modifiers. Examples of suitable slip modifiers include bismuth oxychloride, iron oxide, mica, surface treated mica, ZnO, ZrO2, silica, silica silylate, colloidal silica, attapulgite, sepiolite, starches (i.e. corn, tapioca, rice) , cellulosic ones, nylon-12, nylon-6, polyethylene, talc, styrene, polystyrene, polypropylene, ethylene/acrylic acid copolymer, acrylates, acrylate copolymers (crosslinked methyl methacrylate polymer), sericite, titanium dioxide, oxide aluminum, silicone resin, barium sulfate, calcium carbonate, cellulose acetate, poly(methyl methacrylate), poly(methyl-silsequioxane), talc, tetrafluoro-ethylene, silk powder, boron nitride, lauroyl-lysine , synthetic oils, natural oils, esters, silicones, glycols, and the like. The composition of the present invention suitably may include one or more slip modifiers in an amount of from about 0.01% by weight of the temperature change composition to about 20% by weight of the temperature change composition.
    [86] The temperature shift composition optionally can also additionally contain surface modifiers. Examples of suitable surface modifiers include silicones, quaternary materials, powders, salts, peptides, polymers, clays and glyceryl esters. The composition of the present invention suitably may include one or more surface modifiers in an amount of from about 0.01% by weight of the temperature change composition to about 20% by weight of the temperature change composition.
    [87] The temperature-changing composition optionally can also additionally contain skin protectors. Examples of suitable skin protectants include ingredients referenced in the SP monograph (21 CFR part 347). Suitable skin protectants and amounts include those shown in the SP monograph, Subpart B Active Ingredients Sec 347.10: (a) Allantoin, 0.5 to 2%, (b) Aluminum hydroxide gel, 0.15 to 5%, (c ) Calamine, 1 to 25%, (d) Cocoa butter, 50 to 100%, (e) Cod liver oil, 5 to 13.56%, according to 347.20.(a)(1) or (a )(2), provided the product is labeled such that the quantity used in a 24-hour period does not exceed 10,000 USP Units of vitamin A and 400 Units U.S.P. of cholecalciferol, (f) Colloidal oatmeal, 0.007% minimum; 0.003% minimum in combination with mineral oil in accordance with § 347.20(a)(4), (g) Dimethicone, 1 to 30%, (h) Glycerin, 20 to 45%, (i) Hard fat, 50 to 100% , (j) Kaolin, 4 to 20%, (k) Lanolin, 12.5 to 50%, (l) Mineral oil, 50 to 100%; 30 to 35% in combination with colloidal oatmeal in accordance with § 347.20(a)(4), (m) Petrolatum, 30 to 100%, (n) Sodium bicarbonate, (o) Topical starch, 10 to 98% , (p) White petroleum, 30 to 100%, (q) Zinc acetate, 0.1 to 2%, (r) Zinc carbonate, 0.2 to 2%, (s) Zinc oxide, 1 to 25 %.
    [88] The temperature-changing composition optionally can also additionally contain quaternary ammonium materials. Examples of suitable quaternary ammonium materials include polyquaternium-7, polyquaternium-10, benzalkonium chloride, berrentrimonium methosulfate, cetrimonium chloride, cocamidopropyl pg-dimonium chloride, hydroxy-propyl-trimonium guar chloride, isostearamido-propyl-lactate morpholine, polyquaternium-33, polyquaternium-60, polyquaternium-79, quaternium-18 hectorite, hydrolyzed quaternium-79 silk, hydrolyzed quaternium-79 soy protein, rapeseed starch-propylethyl-dimonium ethosulfate; silicone quaternium-7, stearalkonium chloride, palmitamido-propyl-trimonium chloride, butyl-glycosides, hydroxy-propyl-trimonium chloride, laurdimonium-hydroxy-propyl-decyl-glycosides, and the like. The composition of the present invention suitably may include one or more quaternary materials, in an amount of from about 0.01% by weight of the temperature change composition to about 20% by weight of the temperature change composition.
    [89] The temperature shift composition optionally can also additionally contain additional emulsifiers. As mentioned above, natural fatty acids, esters and alcohols and their derivatives, and combinations thereof, can act as emulsifiers in the composition. Optionally, the composition may contain an additional emulsifier other than natural fatty acids, esters and alcohols and their derivatives, and combinations thereof. Examples of suitable emulsifiers include nonionic ones such as polysorbate 20, polysorbate 80, anionic ones such as DEA phosphate, cationic ones such as berentrimonium methosulfate, and the like. The composition of the present invention suitably may include one or more additional emulsifiers in an amount of from about 0.01% by weight of the temperature shifting composition to about 20% by weight of the temperature shifting composition.
    [90] Temperature shift compositions may additionally include adjuvant components conventionally found in pharmaceutical compositions in their art-established manner and at their art-established levels. For example, the compositions may contain additional compatible pharmaceutically active materials for combination therapy, such as antimicrobial agents, antioxidants, antiparasitic agents, antipruritic agents, antifungal agents, antiseptic actives, biological actives, astringents, keratolytic actives, local anesthetics, antisting agents, anti-redness agents , skin softening agents, and combinations thereof. Other suitable additives that may be included in the compositions of the present invention include dyes, deodorants, fragrances, perfumes, emulsifiers, defoamers, lubricants, natural moisturizing agents, skin conditioning agents, skin protectants and other skin benefit agents (eg extracts such as aloe vera and antiaging agents such as peptides), solvents, solubilizing agents, suspending agents, wetting agents, humectants, preservatives, pH adjusters, buffering agents, dyes and/or pigments , and combinations thereof.
    [91] Although the temperature shifting composition may be present on an outer surface of the tissue paper product 10, as shown in Figure 1, in one embodiment, the temperature shifting composition may be incorporated into the tissue paper product of a such that substantially none of the temperature-changing composition is present on the outer surfaces. For example, referring to Figure 2, there is shown a tissue paper product 20 which comprises a first web of tissue paper 22 laminated to a second web of tissue paper 24. As shown, positioned between the first web of tissue paper 22 and the second tissue paper web 24 is a temperature change composition 26 as described herein. By positioning the temperature shifting composition 26 between the tissue paper webs, substantially preventing the temperature shifting composition from being transferred to a wearer's skin. However, when the tissue paper product 20 is held against the skin, body heat will be absorbed by the temperature-changing composition 26 through the tissue paper webs, thus rising in temperature. The increase in temperature will cause a phase change to occur in the phase change material, providing a cooling sensation to the wearer's skin.
    [92] In a specific embodiment, the cooling tissue product is a facial tissue paper comprising three or more layers, two outer layers and one or more inner layers. The temperature change composition is applied to at least one of the one or more inner layers. In another embodiment, the cooling tissue product is a facial tissue paper comprising two layers, comprising two outwardly facing surfaces and two oppositely facing internal surfaces. Phase change composition is applied to one or both of the oppositely facing inner surfaces. In another embodiment, the product is a multilayer tissue paper product in which the phase change composition is selectively applied to the inner portion of the multilayer product so as to minimize blocking.
    [93] In this way, other beneficial compositions can be applied to the outer surface of the tissue paper product and used in conjunction with the temperature change composition 26. For example, in one modality, a lotion, intended to hydrate the skin, it can be present on at least one outer surface of the tissue paper product and can work in conjunction with the temperature change composition. In this way, the tissue paper product 20 can not only provide a cooling sensation to the user, but can also transfer a moisturizer to the skin.
    [94] In addition to lotions, any other suitable composition can also be applied to the outer surface. For example, in one embodiment, various softening agents may be present on the outer surfaces of the tissue paper product. An example of a softening agent may comprise a polysiloxane.
    [95] In addition to a 2-layer product as shown in Figure 2, other tissue paper products, which may be included in the temperature shift composition, may include more than two layers. For example, a 3-layer tissue paper product 30 is illustrated in Figure 3. As shown, the tissue paper product 30 includes a tissue paper web of medium 34 laminated to the outer tissue paper webs 32 and 36. According to the present invention; a temperature shift composition is positioned between the first tissue paper web 32 and the medium tissue paper web 34. A temperature shift composition 40 is also positioned between the medium tissue paper web 34 and the second tissue paper web 34. external tissue paper 36.
    [96] In an alternative embodiment, the temperature-changing composition may also be present on one or more exterior surfaces of a tissue paper product. For example, referring to Figure 4, in one embodiment, the temperature shift composition can be applied to an outer surface of a toilet paper product 50. As shown, the toilet paper product 50 contains a spirally wound product. containing individual tissue paper sheets 52 separated by lines of perforations 54. The tissue paper sheets may include a first outer surface 56 and a second outer surface 58. Each tissue paper sheet may contain a single layer product or a multiple layer product layers. The temperature-changing composition can be present on the first outer surface 56, the second outer surface 58, or both outer surfaces.
    [97] Applying the temperature shift composition to a toilet paper product, as shown in Figure 4, can provide several unexpected benefits and advantages. For example, the temperature change composition can provide a cooling sensation, which actually causes the toilet paper sheet to evoke a damp feeling for the user. The sensation of dampness can lead to an improved perception of cleanliness.
    [98] When applied to a toilet paper, as shown in Figure 4, the composition of temperature change. may contain a moisturizer as described above to provide additional benefits to the user. EXAMPLES
    [99] The present invention can be better understood with reference to the following examples. Example 1:
    [100] Example 1, illustrated in Table 1, demonstrates a composition using a phase change material, a crystalline initiator, a surfactant, and a vehicle. Table 1: Example 1

    [101] First, Phase A was created by mixing the three components at 70°C to uniformity. Simultaneously, Phase B was created by mixing the two components at 70°C, until uniform. Phase B was then added to Phase A with high shear mixing (5,000 rpm). Once Phase B was added to Phase A, the mixture was mixed at 10,000 rpm for 5 minutes.
    [102] Example 1 produced a white solid gel, which is in a solid state after cooling to room temperature. A portion of the sample was rubbed onto the skin of two human subjects and a considerable cooling effect was felt. This illustrates that the phase change material in combination with a crystalline initiator constitutes an ideal d-phase emulsion for cooling. Comparative Example 1:
    [103] Comparative Example 1, illustrated in Table 2, demonstrates a composition created using a phase change material, a surfactant, and a vehicle. No crystalline initiator was used within the comparative example. Table 2: Comparative Example 1

    [104] First, Phase A was created by mixing the three components at 70°C to uniformity. Phase B was then added to Phase A with high shear mixing (5,000 rpm). Once Phase B was added to Phase A, the mixture was mixed at 10,000 rpm for 5 minutes.
    [105] Comparative Example 1 did not produce a solid white gel. Instead, it produced a clear gel that remained a clear gel after cooling to room temperature. Upon application to the skin, the clear gel did not change phase on the skin and therefore no cooling was felt. The sample was placed in a refrigerator to try to induce crystallization of the phase change material. After 2 hours, the sample was removed from the refrigerator and allowed to acclimate to room temperature. The resulting gel was no longer clear but had turned to a white gel. A portion of the sample was rubbed onto the skin of two human subjects, but no cooling was felt. This illustrates that the phase change material did not constitute a suitable d-phase emulsion for cooling in its delivery vehicle without a crystalline initiator. Comparative Example 2:
    [106] Comparative Example 2, illustrated in Table 3, is a composition that does not contain a phase change material but does include a crystalline initiator. The ingredients were combined and heated to 60°C, until homogeneous. The composition was cooled and produced a solid white paste at room temperature. The paste was rubbed onto the skin of 2 human subjects, but no cooling was felt. This illustrates that the crystalline initiator, by itself, does not constitute a sufficient crystalline network for cooling the skin. Table 3: Comparative Example 2

    [107] These and other modifications and variations to the appended claims may be practiced by those skilled in the art without departing from the spirit and scope of the appended claims. In addition, it should be understood that aspects of the various modalities can be interchanged, both in whole and in part. Furthermore, those skilled in the art will appreciate that the following description is by way of example only, and is not intended to limit the appended claims.
    权利要求:
    Claims (13)
    [0001]
    1. Temperature shift composition for providing a cooling sensation to a wearer's skin comprising a structured emulsion containing: a phase change material present in an amount between 1% by weight of the temperature shift composition and 90% by weight of change composition from. temperature; a crystalline initiator present in an amount between 0.1% by weight of the temperature shifting composition and 30% by weight of the temperature shifting composition; a vehicle present in an amount of between 1% by weight of the temperature shifting composition and 40% by weight of the temperature shifting composition; and a surfactant present in an amount between 0.5% by weight of the temperature change composition and 15% by weight of the temperature change composition; characterized by the fact that the structured emulsion is a d-phase emulsion.
    [0002]
    2. Temperature change composition according to claim 1, characterized by the fact that the temperature change composition is thermally reversible.
    [0003]
    3. Temperature change composition according to claim 1, characterized by the fact that the temperature change composition is solid at. room temperature and to experience a phase change at a temperature greater than 26°C.
    [0004]
    4. Temperature change composition, according to claim 1, characterized by the fact that the crystalline initiator is selected from fatty alcohols, fatty acids, esters, sugars, salts, crystalline and microcrystalline waxes, microcrystalline triglycerides and combinations thereof .
    [0005]
    5. Temperature change composition according to claim 1, characterized by the fact that the vehicle is selected from water, glycerin, diglycerin, glycerin derivatives, glycols, glycol derivatives, sugars, ethoxylated esters and ethers and/ or propoxylates, urea, sodium PCA, alcohols, ethanol, isopropyl alcohol and combinations thereof.
    [0006]
    6. Temperature change composition according to claim 1, characterized by the fact that the phase change material is selected from a hydrocarbon, a wax, an oil, a natural butter, a fatty acid, an ester of fatty acid, a dibasic acid, a dibasic ester, a 1-halide, a primary alcohol, an aromatic compound, an anhydride, an ethylene carbonate, a polyhydric alcohol, and combinations thereof, or in which the change material phase is selected from tricaprin, paraffin, nonadecane, octadecane, stearyl heptanoate, lauryl lactate, lauryl alcohol, capric acid, caprylic acid, cetyl babassuate, Mangifera indica stone butter (mango), stone butter. Theobroma cacao (cocoa), Butyrospermum parkii butter, di-C12-C15-alkyl fumarate, stearyl caprylate, cetyl lactate, cetyl acetate, C24-C28-alkylmethicone, glyceryl dilaurate, PG chloride phosphate -stearamido-propyl dimonium, jojoba esters and combinations thereof.
    [0007]
    7. Temperature change composition according to claim 1, characterized by the fact that the surfactant is selected from sugar esters and their derivatives, sucrose esters, polyglyceryl esters, sorbitan esters, fatty acid esters, alkyl polyglycosides and combinations thereof.
    [0008]
    8. A dry tissue paper product, characterized in that it comprises: a first tissue paper web comprising fibers, the tissue paper web including a first side and a second side; and a temperature change composition; according to claim 1, present on at least the first side of the tissue paper web.
    [0009]
    9. Dry tissue paper product according to claim 8, characterized in that the temperature change composition has a heat of fusion of at least 100 J/g.
    [0010]
    10. Dry tissue paper product according to claim 8, characterized in that the temperature change composition is thermally reversible.
    [0011]
    11. Dry tissue paper product according to claim 8, characterized in that the temperature change composition is solid at room temperature and has a phase change at a temperature greater than 26°C.
    [0012]
    12. Dry tissue paper product according to claim 8, characterized in that the phase change material is oil soluble and hydrophobic.
    [0013]
    13. Dry tissue paper product according to claim 8, characterized in that the temperature change composition is present in the tissue paper web in an amount of 4 g/m2 to 40 g/m2.
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    同族专利:
    公开号 | 公开日
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    JP2013511509A|2013-04-04|
    EP2501773B1|2018-12-19|
    WO2011061642A2|2011-05-26|
    AU2010320533A1|2012-05-17|
    BR112012011935A2|2020-09-08|
    JP5731528B2|2015-06-10|
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    AU2010320533B2|2016-02-25|
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    US20110123584A1|2011-05-26|
    KR101748457B1|2017-06-16|
    MX2012005786A|2012-06-19|
    IL219226D0|2012-06-28|
    CA2777853A1|2011-05-26|
    WO2011061642A3|2011-10-27|
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    法律状态:
    2020-09-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-02-09| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-04-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-18| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/10/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/622,547|2009-11-20|
    US12/622,547|US9181465B2|2009-11-20|2009-11-20|Temperature change compositions and tissue products providing a cooling sensation|
    PCT/IB2010/054568|WO2011061642A2|2009-11-20|2010-10-08|Temperature change compositions and tissue products providing a cooling sensation|
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