巴西专利BR112012011934B1 DRY SUBSTRATE

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专利摘要:
tissue paper products including a temperature change composition containing phase change components within a non-interfering molecular structure. cleaning products, such as tissue papers, contain a temperature-changing composition that can provide a cooling sensation when in contact with a wearer's skin. the temperature change composition includes a phase change component and a non-interfering molecular structure. phase change components, in one modality, can exhibit relatively high heat of fusion. when undergoing a phase change, the temperature change composition absorbs heat and thereby provides a cooling feeling or cooling sensation to a user's skin.
公开号:BR112012011934B1
申请号:R112012011934-6
申请日:2010-10-08
公开日:2021-07-20
发明作者:Helen Kathllen Moen；Jeffery Richard Seidling；Scott W. Wenzel；Corey Thomas Cunningham
申请人:Kimberly - Clark Worldwide, Inc；
IPC主号:

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HISTORIC
[001] Various 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.
[002] There are several different ways to impart a cooling sensation to the skin, including the use of evaporation, sensorineural components or thermodynamic agents such as phase change components. 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 feeling of cooling from menthol is not due to latent heat of evaporation, but appears to be the result of direct stimulation on the cold receptors in nerve endings.
[003] The use of phase change components 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 by a unit of mass of a solid chemical element at its melting point in order to convert the solid into a liquid at the same temperature. The '564 application 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. This approach is problematic as the cosmetic skin care composition comes in direct contact with the skin and phase change components can cause irritation to the skin.
[004] 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 which is incorporated herein by reference. 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.
[005] In the products described above, it is intended that the products come into direct contact with the skin. 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 maintaining this phase change agent within the substrate, preventing it to irritate the skin. SUMMARY OF THE INVENTION
[006] In general, the present invention is directed to dry cleaning products and particularly to dry substrates, which, 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, the present invention is directed to a tissue paper product that can be used not only to clean someone's nostrils, but that can also provide the nostrils with a cooling sensation, providing comfort and relief.
[007] The dry substrate can be a product that is made of at least one fiber web, such as pulp fibers alone or in combination with synthetic fibers. A temperature change composition including a phase change component in combination with a non-interfering molecular structure is present on at least one side of the web. The phase change component undergoes a phase change from a temperature between about 20°C and 35°C, within dry tissue paper or similar dry cleaning product, for cooling the skin during use of the product.
[008] 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 contain 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, aromatic compounds, 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 indica (mango), Theobroma cacao kernel butter (cocoa), Butyrospermum parkii butter, di-C12-C15-alkyl fumarate, stearyl caprylate, cetyl lactate, cetyl acetate, C24-C28-alkylmethicone, dilaurate glyceryl, PG-dimonium stearamidopropyl chloride-phosphate, jojoba esters and combinations thereof.
[009] The phase change component may 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 95% by weight of the temperature change composition, and even more desirably between about 50% by weight of the temperature change composition and about 90% by weight of the temperature change composition.
[0010] In an exemplary embodiment, the non-interfering molecular structure may be a crystalline diluent selected from fatty alcohols and fatty acids, fatty alcohols and fatty acids having a chain length from 6 to about 60 carbon atoms, and, more desirably, having a chain length of from 10 to about 30 carbon atoms. A suitable example of such fatty acids includes hydroxystearic acid.
[0011] In other embodiments, the non-interfering molecular structure is a polymer selected from polyethylene, poly(C13-C30-alkyl acrylate), crosslinked polymer of C8-C22-alkyl acrylates/methacrylic acid, acrylate copolymer. C8-C22-alkyl/butylmethicone methacrylate, and mixtures thereof. In still other embodiments, the non-interfering molecular structure can be copolymers in polystyrene-poly(ethylene-propylene) diblocks, copolymers in polystyrene-poly(ethylene-butylene)-polystyrene triblocks, copolymers in polystyrene-poly(ethylene-butylene-triblocks) styrene)-polystyrene (S-EB/SS), polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymers grafted with maleic anhydride, copolymers in polystyrene-poly(ethylene-butylene-styrene)-polystyrene triblocks grafted with anhydride maleic, polystyrene-polybutadiene-poly(styrene-butadiene)-polybutadiene block copolymers, hydrogenated radial block copolymers, and mixtures thereof.
[0012] The non-interfering molecular structure may be present in an amount between about 1% by weight of the temperature shift composition and about 50% by weight of the temperature shift composition, more desirably between about 2% by weight of the temperature change composition and about 45% by weight of the temperature change composition, and even more desirably between about 5% by weight of the temperature change composition and about 40% by weight of the temperature change composition. temperature change.
[0013] Other features and aspects of the present invention are discussed in greater detail below. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] 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.
[0015] 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
[0016] 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.
[0017] Dry, as used herein 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. "Balance moisture" is the moisture the leaf 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.
[0018] 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 application rate of the cooling composition applied to the product of tissue paper expressed in g/m2.
[0019] The 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 Modulated 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.
[0020] The present invention, generally speaking, is directed to dry cleaning products, such as dry tissue paper products, which exhibit improved perceived benefits. In particular, cleansers prepared in accordance with the present invention, when contacted against 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 can be designed to provide a cooling sensation without having to transfer any chemical composition to the user's skin.
[0021] 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 component which undergoes a phase change when raised in temperature. The phase change component, 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 cleanser is heated, such as being in contact with someone's skin, the phase change component quickly heats up to its melting point. Due to the high heat of fusion, significant amounts of heat can be absorbed without changing the temperature until the phase change component is completely melted. In turn, a cooling sensation is provided to the user's skin.
[0022] 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 contain any suitable base sheet made from several different types of fiber supplies. The tissue paper product can also be a single layer product or it can contain multiple tissue paper webs laminated together.
[0023] Tissue paper webs, which can be used to construct the tissue paper product 10, for example, generally may 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.
[0024] 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, sabai 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.
[0025] 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, may 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 chemically modified cellulose. 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.
[0026] 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.
[0027] 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-cracking, hydroentangling, air dispersion, as well as other steps known in the art.
[0028] 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.
[0029] 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 one 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.
[0030] The 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 fatty dialkyl quaternary amine salts, fatty monoalkyl tertiary amine salts, primary amine salts, imidazoline quaternary salts, quaternary silicone salt 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 Kaun '665 patent describes the application of cationic silicone compositions as debonding agents.
[0032] 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.
[0033] In an alternative embodiment, the debonding agent may 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.
[0034] In one embodiment, the debonding agent may be added to the fiber supply according to 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 to form a non-woven web.
[0035] Optional chemical additives can also be added to the aqueous papermaking supply or to the formed embryonic web 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 that can be applied to the web in conjunction with the additive 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, with the additive or additives being combined directly with the additive composition.
[0036] 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 nonionic 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.
[0037] In general, the products can be used in conjunction with any known materials and chemicals that are not opposed 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.
[0038] Tissue paper webs which may be treated in accordance with the present invention may include a single homogeneous fiber layer or may include a layered or layered construction. For example, the tissue paper web layer can include two or three layers of fibers. Each layer can have a different fiber combination.
[0039] 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.
[0040] 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.
[0041] The grammage of tissue paper webs made in accordance with the present invention 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 toilet and facial tissue papers, 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.
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.
[0043] 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 generally 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.
[0044] In accordance with the present invention, the tissue paper product 10 contains a temperature-changing composition to impart a cooling sensation to a user's skin. To achieve delivery of the cooling sensation, a temperature-changing composition, including a non-interfering molecular structure and a phase-change component incorporated within the non-interfering molecular structure, is employed.
[0045] The temperature change composition includes at least one phase change component that undergoes a phase change when heated, which in turn provides a cooling sensation to the skin. The temperature shift composition can be incorporated into the tissue paper product 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, gravure printing direct or indirect gravure 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 or slit coater. 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. It may also sometimes be advantageous to cool the web directly after application of the molten phase change component, 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 component 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.
[0046] In general, a phase change component 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 component used in conjunction with various aspects of the present invention will preferably be capable of altering a thermal energy flux during a time during which the phase change component is absorbing or releasing heat, typically when the phase change component is Phase change 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 component is absorbed or released during the heating or cooling process. Thermal energy can be stored in or removed from the phase change component, and the phase change component typically can be effectively recharged by a source of heat or cold. For purposes of the present invention, 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 of the present invention, 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.
[0047] The temperature change composition of the present invention may contain a mixture of phase change components having a mixture of transition temperatures. When a mixture of phase change components 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 components containing 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 components 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 component then melts at your 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 components, one can extend the range of temperatures at which cooling is felt. In one example, a combination of phase change components, having phase change temperatures at 18°C, 28°C and 35°C, are combined to create a temperature change composition having a melting point between 23° C and 32°C.
[0048] Suitable phase change components 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, aromatic compounds, 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, diaminopentaerythritol, propanol 1,2,3-tridecanoate and tris(hydroxy-m) acid ethyl) acetic, polymers (e.g. 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 chain poly(ethylene glycol) side and copolymers containing polyethylene, poly(ethylene glycol), polypropylene, poly(propylene glycol) or poly(tetramethylene glycol), and mixtures thereof. Well suited phase change components are tricaprin, paraffin, nonadecane, octadecane, stearyl heptanoate, lauryl lactate, lauryl alcohol, capric acid, caprylic acid, cetyl babassuate, Mangifera indica stone butter (mango), stone butter of Theobroma cacao (cocoa), Butyrospermum parkii butter, di-C12-C15-alkyl fumarate, stearyl caprylate, cetyl lactate, cetyl acetate, C24-C28-alkyl-methicone, glyceryl dilaurate, chloride-phosphate PG-stearamido-propyl dimonium, jojoba esters and combinations thereof.
[0049] As described above, in one embodiment, the temperature change composition may contain a mixture of two or more phase change components. In a particular embodiment, the temperature shift composition contains a mixture of stearyl heptanoate and n-octadecane.
[0050] Phase change components of the present invention may include phase change components in an unencapsulated form and phase change components in an encapsulated form. A phase change component 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 shapes (eg, cast and so on).
[0051] Another aspect of temperature change compositions is the heat of fusion of the temperature change composition containing the phase change components. The temperature shift compositions of the present invention can exhibit melting heats of at least 100 J/g. For example, in one embodiment, the temperature change composition contains a hydrocarbon as the phase change component, such as a straight chain hydrocarbon. The hydrocarbon may contain, for example, more than 10 carbon atoms in the chain, such as from about 10 carbon atoms to about 30 carbon atoms in the chain. Particular examples of phase change components include, for example, octadecane (melting heat of about 213 J/g), nonadecane, stearyl heptanoate, and mixtures thereof.
[0052] The phase change components can be contained in the temperature change composition in an amount of about 1% by weight of the temperature change composition up to 99% by weight of the temperature change composition, such as about from 5% by weight to about 95% by weight. For example, in particular embodiments, the phase change components can be present in the temperature change composition in an amount from about 10% by weight to about 90% by weight.
[0053] As discussed above, the temperature change composition includes a non-interfering molecular structure. Non-interfering molecular structure is defined as any ingredient that can be combined with the phase change component such that a homogeneous mixture can be obtained and the mixture maintains a gel-like consistency above skin temperature (approximately 40°C) . Additionally, non-interfering molecular structure is defined as any ingredient that can be combined with the phase change component such that the mixture retains at least 75% of the enthalpy of the pure phase change component. Not being bound by any theory, but believing that the non-interfering molecular structure creates a network for the phase change component to aggregate in and around, such that the crystal size of the phase change component is large enough to provide a cooling sensation compared to pure phase change material. Unexpectedly, a smaller amount of the phase change component allows for effective cooling, but the phase change component is kept within the non-interfering molecular structure, such that the phase change component does not penetrate the skin or cause irritation, or redistribute within the tissue paper.
[0054] The use of a non-interfering molecular structure helps to prevent phase change agents from coming into substantial contact with the skin and/or from transferring to the skin and causing irritation or being removed from the product before use, especially when cast. Therefore, the non-interfering molecular structure can reduce irritation and prevent the removal of phase change agents from the product prior to use. With the above 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", the phase change materials transfer to the skin and cause irritation.
[0055] Additionally, the non-interfering molecular structure can be thermally reversible. Having a thermally reversible composition allows the product to be exposed to extreme temperatures during product transport and still function effectively at 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 shift compositions disclosed, for example, in PCT Patent Application No. PCT/IB2009/051515 are not thermally reversible and do not provide such benefits.
[0056] In an exemplary embodiment, the non-interfering molecular structure may include a crystalline diluent selected from fatty alcohols and fatty acids. Exemplary fatty alcohols and fatty acids, for use as the crystalline diluents, have a carbon chain length of about 6 to 60 carbon atoms, more desirably having a carbon chain length of about 8 to 40 carbon atoms and, even more desirably, having a carbon chain length of about 10 to 30 carbon atoms.
[0057] In another embodiment, the non-interfering molecular structure may include a polymer. Desirably, the non-interfering molecular structure could include, but not be limited to, polymers such as polyethylene, poly(C10-C30alkyl acrylate), C8-C22-alkyl acrylates/methacrylic acid cross-linked polymer, C8-acrylate copolymer. C22-alkyl/butyl-dimethicone methacrylate. A particularly desirable non-interfering molecular structure is polyethylene, Asebsa PR200, commercially available from Honeywell.
[0058] Additionally, the non-interfering molecular structure could include, but not be limited to, block copolymers. Methods of preparing block copolymers are known in the art and many hydrogenated block copolymers are commercially available. Illustrative commercially available hydrogenated block copolymers include the polystyrene-poly(ethylene-propylene) diblock copolymers available from Kraton Polymers as Kraton G1701 and G1702; the polystyrene-poly(ethylenebutylene)-polystyrene triblock copolymers available from Kraton Polymers as Kraton G1641, G1650, G1651, G1654, G1657, G1726, G4609, G4610, GRP-6598, RP-6924, MD-6932M, MD-6933 and MD-6939; the polystyrene-poly(ethylene-butylene-styrene)-polystyrene (SEB/SS) triblock copolymers available from Kraton Polymers as Kraton RP-6935 and RP6936, the polystyrene-poly(ethylenepropylene)-polystyrene triblock copolymer available from Kraton Polymers such as Kraton G1730; the maleic anhydride grafted polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymers available from Kraton Polymers as Kraton G1901, G1924 and MD-6684; the polystyrene-poly(ethylene-butylenestyrene)-polystyrene-grafted copolymer with maleic anhydride available from Kraton Polymers as Kraton MD-6670; the polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymer containing 67 wt% polystyrene available from Asahi Kasei Elastomer as TUFTEC H1043; the polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymer containing 42% by weight polystyrene available from Asahi Kasei Elastomer as TUFTEC H1051; the polystyrenepoly(butadiene-butylene)-polystyrene triblock copolymers available from Asahi Kasei Elastomer as TUFTEC P1000 and P2000; the polystyrene-polybutadiene-poly(styrene-butadiene)-polybutadiene block copolymer available from Asahi Kasei Elastomer as S.O.E.-SS L601; the hydrogenated radial block copolymers available from Chevron Phillips Chemical Company as K-Resin KK38, KR01, KR03 and KR05; the polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymer containing about 60% by weight of polystyrene available from Kuraray as SEPTON S8104; the polystyrene-poly(ethylene-propylene)-polystyrene triblock copolymers available from Kuraray as SEPTON S4044, 54055, 54077 and 54099; and the polystyrene-poly(ethylene-propylene)-polystyrene triblock copolymer containing about 65% by weight of polystyrene available from Kuraray as SEPTON 52104. Particularly preferred block copolymers are Kraton RP-6935 and RP-6936 from Kraton Polymers . Mixtures of two or more block copolymers can also be used as the non-interfering molecular structure.
[0059] In addition, the non-interfering molecular structure can be selected from combinations of the crystalline diluents, polymers and block copolymers described above. For example, a desirable non-interfering molecular structure can include both stearyl alcohol and polyethylene.
[0060] Typically, temperature shift compositions contain a non-interfering molecular structure in an amount from about 1% by weight of the temperature shift composition to about 50% by weight of the temperature shift composition, more typically, from about 2% by weight of the temperature change composition to about 45% by weight of the temperature change composition, and more typically from about 5% by weight of the temperature change composition to about 40% by weight of the temperature change composition.
[0061] Perhaps most importantly, however, 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/gram, and the application rate of the temperature change composition applied to the tissue paper product , expressed in g/m2. The heat absorption factor of the products can be at least 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 components are present in the web in an amount of from about 4 g/m2 to about 40 g/m2.
[0062] In addition to one or more phase change components, the temperature change composition may contain various other ingredients and components. Examples of other ingredients, which may be included within the temperature change composition, are emollients, sterols or derivatives of natural and synthetic sterols, fats or oils, viscosity enhancers, rheology modifiers, polyols, surfactants, alcohols, esters, silicones , clays, starch, cellulose, particulates, moisturizers, film formers, slip modifiers, surface modifiers, skin protectants, humectants, anti-wrinkle actives, smoothing agents, antioxidants, and the like.
[0063] Therefore, temperature change compositions optionally may 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-trimethylsilanes, dimethicone, cross-linked polymers of dimethicone, cyclomethicone, lanolin and its derivatives, glycerol esters and derivatives, propylene glycol esters and derivatives, esters and fatty acid derivatives , alkoxylated carboxylic acids, alkoxylated alcohols, and combinations thereof.
Ethers such as eucalyptol, cetearyl glycoside, polyglyceryl-3 cetyl dimethyl isosorbic ether, polyglyceryl-3 decyl-tetradecanol, propylene glycol myristyl ether, and combinations thereof, can also be suitably used as emollients.
[0065] The temperature change composition may include one or more emollients in an amount from about 0.01% by weight of the temperature change composition to about 70% by weight of the temperature change composition, more desirably. from about 0.05% by weight of the temperature change composition to about 50% by weight of the temperature change composition, 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.
[0066] The temperature change composition may include one or more viscosity enhancers in an amount of from about 0.01% by weight of the temperature change composition to about 25% by weight of the temperature change composition, plus 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 change composition of temperature to about 10% by weight of the temperature change composition.
[0067] The temperature change 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.
[0068] The temperature change composition optionally may 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 change composition may suitably include one or more humectants in an amount of from about 0.05% by weight of the temperature change composition to about 25% by weight of the temperature change composition.
[0069] The temperature change composition optionally can 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 products, polysaccharides, albumin, acrylate derivatives, IPDI derivatives, and the like. The temperature shifting 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.
[0070] The temperature change composition optionally may 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 temperature change composition may suitably 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.
[0071] The temperature change composition may also additionally contain surface modifiers. Examples of suitable surface modifiers include silicones, quaternary materials, powders, salts, peptides, polymers, clays and glyceryl esters. The temperature shifting composition may suitably include one or more surface modifiers 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.
[0072] The temperature change composition may 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%, (1) 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 petrolatum, 30 to 100%, (q) Zinc acetate, 0.1 to 2%, (r) Zinc carbonate, 0.2 to 2%, (s) Zinc oxide, 1 to 25 %.
[0073] The temperature change composition may 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, guar hydroxy-propyltrimonium chloride, isostearamido-propyl-morpholine lactate, polyquaternium-33, polyquaternium-60, polyquaternium-79, quaternium-18 hectorite, hydrolyzed quaternium-79 silk, hydrolyzed quaternium-79 soy protein, rapeseed starch-propylethyldimonium ethosulfate, quaternium-7 silicone, stearalkonium chloride, palmitamido-propyl-trimonium chloride, butylglycosides, hydroxy-propyl-trimonium chloride, laurdimonium-hydroxy-propyl-decyl-glycosides, and the like. The temperature shifting composition may suitably include one or more quaternary materials, 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.
[0074] The temperature change composition may 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 non-ionic ones such as polysorbate 20, polysorbate 80, anionic ones such as DEA phosphate, cationic ones such as berentrimonium methosulfate, and the like. The temperature shifting composition may suitably 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.
[0075] 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, which may be included in temperature-changing compositions, include dyes, deodorants, fragrances, perfumes, emulsifiers, defoamers, lubricants, natural moisturizing agents, skin conditioning agents, skin protectants and other beneficial agents for the skin (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.
[0076] Although the temperature-changing composition may be present on an outer surface of the tissue paper product 10, as shown in Figure 1, in one embodiment, the temperature-changing composition may be incorporated into the tissue 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 shifting composition 26. By positioning the temperature shifting composition 26 between the tissue paper webs, substantially preventing the temperature shifting composition from being transferred to a user'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 component, providing a cooling sensation to the user's skin.
[0077] In a specific embodiment, the cooling tissue paper product is a facial tissue paper containing 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 two-ply facial tissue paper containing 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.
[0078] 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 moisturize 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.
[0079] 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.
[0080] In addition to a 2-layer product as shown in Figure 2, other tissue paper products can be made that can 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 In the present invention, a temperature change composition is positioned between the first tissue paper web 32 and the middle tissue paper web 34. A temperature change composition 40 is also positioned between the middle tissue paper web 34 and the second outer tissue paper web 36.
[0081] In an alternative embodiment, the temperature change 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. In accordance with the present invention, the temperature change composition may be present on the first outer surface 56, the second outer surface 58, or both of the outer surfaces.
[0082] 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.
[0083] When applied to a toilet paper, as shown in Figure 4, the temperature-changing composition can contain a moisturizer as described above, so as to provide additional benefits to the user.
[0084] When hydrophobic phase change components are used, it may be advantageous to use methods to reduce the impact of any hydrophobicity that may develop due to the presence of the hydrophobic phase change components. A variety of methods are known in the art to reduce the hydrophobicity of tissue paper sheets containing hydrophobic additives. For example, hydrophilic surfactants having an HLB greater than 4 can be combined in the temperature change composition, as taught in patent US6,428,794B1, "Lotion composition for treating tissue paper". Other exemplary means for reducing tissue sheet hydrophobicity include, but are not limited to those taught in US6,949,167B2, US20050274470A1, US6,896,766B2 and US7,008,507B2, incorporated herein by reference. EXAMPLES Examples 1-13:
[0085] The present invention can be better understood with reference to the following examples.
[0086] The following is a list of 13 temperature change compositions suitably containing a phase change component and a non-interfering molecular structure. Comparative Example 1 does not include a non-interfering molecular structure.
[0087] For the phase change component, stearyl heptanoate is used. Stearyl heptanoate has a melting point of 23-27°C and a latent heat of fusion around 174 J/g. Stearyl heptanoate is an ester of stearyl alcohol and heptanoic acid (enanthic acid). It is prepared from stearyl alcohol, which can be obtained from spermaceti oil or plant sources. Stearyl heptanoate melts quickly onto the skin at 23-27°C causing the skin to cool. For the non-interfering molecular structure, a variety of different crystalline diluents are used. Table 1: Exemplary Compositions

[0088] The latent heat of fusion and melting points of various compositions were determined by differential scanning calorimetry. The samples were analyzed on a TA Instruments DSC 2920 Modulated DSC (standard cell) using the following experimental procedure: Approximately 5 mg of the respective material was weighed to the nearest 0.1 mg. Samples were 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 (AFIE) was computed from the integral under the respective melting peak (melting point), with the results reported being the mean value from 3 heating/cooling cycles. The calculated values for the examples are shown in Table 2. Table 2: Enthalpy Calculations

[0089] Examples 1-13 illustrate that, by using a crystalline thinner material, the temperature-changing composition still provides sufficient enthalpy to provide the sensation of cooling. If the phase change component concentration were directly proportional to the cooling capacity (enthalpy), then an enthalpy of 159.39 J/g would be expected from a 10% reduction in the full enthalpy of 100% of the component. phase change. As evidenced by Table 2, several exemplary compositions retained a high percent enthalpy of stearyl heptanoate at 100%, while reducing the overall loading of the phase change component by 10-20%. One composition that performed particularly well included stearyl heptanoate as the phase change component and stearyl alcohol as the crystalline diluent.
[0090] Without being bound by any theory, but believing that the self-assembling crystal structure of the thinner materials provides non-interfering molecular structure for the phase change component. Therefore, the phase change component aggregates in and around the non-interfering molecular structure such that the crystal size of the phase change component is sufficient to provide an equivalent cooling sensation compared to the pure phase change component. Example 14:
[0091] Example 14 demonstrates the application of the temperature shift composition to a base sheet of tissue paper to produce a facial tissue paper product exhibiting a perception of cooling. A three-layer creped tissue paper sheet was used, having a finished basis weight of 44 g/m2, consisting of 65% hardwood fibers and 35% softwood fibers. Each layer was made from a supply of laminated fibers including two outer layers and a middle layer. A composition including 70% by weight stearyl heptanoate, 25% by weight stearyl alcohol and 5% by weight polyethylene was prepared in the laboratory, coated onto tissue papers and placed inside a modified repetitive nostril tissue and methodology panel adaptable. Results from this study show improved esthetics, lower TEWL, lower redness ratings, and lower dropout rates data from similar tests with stearyl heptanoate at 100% levels or a 90:10 ratio in weight with cosmetic wax. It was also found that the tissue paper sheet provided a pronounced cooling sensation when held in the hand or against the face. Example 15:
[0092] Example 15 illustrates an alternative embodiment of the temperature shift composition containing 90% by weight of stearyl heptanoate and 10% by weight of polystyrene-poly(ethylene-butylene-styrene)-polystyrene (SEB/) triblock copolymers SS) (Kraton RP-6936).
Example 15 was prepared in the laboratory by heating stearyl heptanoate to 100-120°C. The polymer was added with homogenization (7,000 rpm) for 20 minutes or until completely wetted and dispersed. Once the polymer solution was clear and homogeneous, the mixture was allowed to cool to room temperature. The off-white gel was malleable and melted at body temperature. Upon melting, a high degree of cooling was experienced from the temperature-changing composition by human subjects touching the gel. The composition of Example 15 was coated onto tissue papers and placed inside a modified repetitive nostril tissue and adaptable methodology panel. Results from this study showed improved esthetics, lower TEWL, lower redness ratings, and lower dropout rates data from similar tests with stearyl heptanoate at 100% levels or in a 90:10 ratio
[0094] O by weight with cosmetic wax. It was also found that the tissue paper sheet provided a pronounced cooling sensation when held in the hand or against the face.
[0095] These and other modifications and variations, in relation 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 foregoing description is by way of example only, and is not intended to limit the appended claims.

权利要求:
Claims (15)
[0001]
1. Dry substrate, characterized in that it comprises: a first web (22) comprising fibers, the web including a first side and a second side; and a temperature change composition (26, 40) present on at least the first side of the tissue paper web (22), the temperature change composition (26, 40) comprising: a phase change component undergoing a phase change at a temperature of 20°C to 35°C, the phase change component having a heat of fusion of at least 100 J/g and being present in the tissue paper web (22, 24), such that the tissue paper web has a heat absorption factor of at least 500 J/m2, the phase change component present in an amount between 1% by weight of the temperature change composition (26, 40) and 99.9% by weight of the temperature change composition (26, 40), and a non-interfering molecular structure present in an amount between 1% by weight of the temperature change composition (26, 40) and 50% by weight of the temperature change composition. temperature (26, 40).
[0002]
2. Dry substrate according to claim 1, characterized in that the non-interfering molecular structure comprises a crystalline diluent selected from fatty alcohols and fatty acids, fatty alcohols and fatty acids having a chain length of 6 to 50 carbon atoms, such as a chain length of 10 to 30 carbon atoms.
[0003]
3. Dry substrate according to claim 1, characterized in that the non-interfering molecular structure comprises a polymer selected from polyethylene, poly(C10-30-alkyl acrylate), crosslinked polymer of C8-22 acrylates -alkyl/methacrylic acid, C8-22-alkyl acrylate/butyl-dimethicone methacrylate copolymer, and mixtures thereof.
[0004]
4. Dry substrate according to claim 1, characterized in that the non-interfering molecular structure comprises a block copolymer selected from polystyrene-poly(ethylene-propylene) diblock copolymers, polystyrene-triblock copolymers- poly(ethylene-butylene)-polystyrene, polystyrene triblock copolymers poly(ethylene-butylene-styrene)-polystyrene (S-EB/SS), polystyrene-poly(ethylene-butylene)-polystyrene triblock copolymers grafted with maleic anhydride , polystyrene-poly(ethylene-butylene-styrene)-polystyrene triblock copolymers grafted with maleic anhydride, polystyrene-polybutadiene-poly(styrene-butadiene)-polybutadiene block copolymers, hydrogenated radial block copolymers, and mixtures thereof.
[0005]
5. Dry substrate according to claim 1, characterized in that the phase change component is present in an amount between 20% by weight of the temperature change composition (26, 40) and 95% by weight of the temperature change composition (26, 40), such as an amount between 50% by weight of the temperature change composition (26, 40) and 90% by weight of the temperature change composition (26, 40).
[0006]
6. Dry substrate according to claim 1, characterized in that the non-interfering molecular structure is present in an amount between 1% by weight of the temperature change composition (26, 40) and 50% by weight of the composition of temperature shifting (26, 40), such as an amount between 5% by weight of the temperature shifting composition (26, 40) and 40% by weight of the temperature shifting composition (26, 40).
[0007]
7. Dry substrate according to claim 1, characterized in that the phase change component is oil soluble and hydrophobic.
[0008]
8. Dry substrate according to claim 1, characterized in that the phase change component is selected from tricaprin, paraffin, nonadecane, octadecane, stearyl heptanoate, lauryl lactate, lauryl alcohol, capric acid, caprylic acid, cetyl babassuate, Mangifera indica (mango) kernel butter, Theobroma cacao (cocoa) kernel butter, Butyrospermum parkii butter, Di-C12-15-alkyl fumarate, stearyl caprylate, cetyl lactate, cetyl acetate, C24-28-alkylmethicone, glyceryl dilaurate, stearamidopropyl PG-dimonium chloride phosphate, jojoba esters and combinations thereof.
[0009]
9. Dry substrate according to claim 1, characterized in that the phase change component has a heat of fusion of at least 100 J/g.
[0010]
10. The dry substrate of claim 1, further comprising a lotion composition, the lotion composition being located on an outer surface of the substrate.
[0011]
11. Dry substrate according to claim 1, characterized in that the temperature change composition (26, 40) is present on the tissue paper web (24, 34) in an amount of 4 g/m2 to 40 g/m2.
[0012]
12. Dry substrate according to claim 1, characterized in that the phase change component contains a hydrocarbon, a wax, an oil, a natural butter, a fatty acid, a fatty acid ester, a dibasic acid , a dibasic ester, a 1-halide, a primary alcohol, an aromatic compound, an anhydride, an ethylene carbonate, a polyhydric alcohol, or mixtures thereof.
[0013]
13. Dry substrate according to claim 1, characterized in that the phase change component comprises stearyl heptanoate and that the non-interfering molecular structure comprises stearyl alcohol.
[0014]
14. Dry substrate according to claim 13, characterized in that the non-interfering molecular structure additionally comprises polyethylene.
[0015]
15. Dry substrate according to claim 1, characterized in that the non-interfering molecular structure is selected from crystalline thinners, polymers, block copolymers and combinations thereof.

类似技术:

公开号 | 公开日 | 专利标题

BR112012011934B1|2021-07-20|DRY SUBSTRATE

US9545365B2|2017-01-17|Temperature change compositions and tissue products providing a cooling sensation

BR112012011937B1|2021-06-22|DRY SUBSTRATE, E, METHOD OF PREPARATION OF THE DRY SUBSTRATE

BRPI0909555B1|2019-08-06|DRY PAPER PRODUCT AND SKIN-SOFTING METHOD

同族专利:

公开号 | 公开日

BR112012011934A2|2020-09-08|

AU2010320534B2|2016-02-25|

US20110124769A1|2011-05-26|

EP2501266A2|2012-09-26|

CA2777854A1|2011-05-26|

JP5913116B2|2016-04-27|

IL219229D0|2012-06-28|

US20140302117A1|2014-10-09|

KR20120107078A|2012-09-28|

WO2011061643A3|2011-08-18|

US8795717B2|2014-08-05|

CA2777854C|2017-05-09|

WO2011061643A2|2011-05-26|

KR101776970B1|2017-09-08|

ZA201202788B|2013-06-26|

AU2010320534A1|2012-05-17|

EP2501266B1|2016-03-30|

MX361036B|2018-11-23|

EP2501266A4|2014-08-06|

MX2012005787A|2012-06-19|

JP2013511626A|2013-04-04|

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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]|

2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2021-07-20| 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, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |

优先权:

申请号 | 申请日 | 专利标题

US12/622,571|US8795717B2|2009-11-20|2009-11-20|Tissue products including a temperature change composition containing phase change components within a non-interfering molecular scaffold|

US12/622,571|2009-11-20|

PCT/IB2010/054569|WO2011061643A2|2009-11-20|2010-10-08|Tissue products including a temperature change composition containing phase change components within a non-interfering molecular scaffold|

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