• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a substrate material having a decreased retentive capacity for use as a carrier for aerosol forming materials in smoking articles which smoking articles are capable of producing substantial quantities of aerosol, both initially and over the useful life of the product, without significant thermal degradation of the aerosol former and without the presence of substantial pyrolysis or incomplete combustion products or sidestream aerosol. Thus, the substrate material of the present invention when used with preferred smoking articles is able to provide the user with the sensations and benefits of cigarette smoking without burning tobacco. In addition, the article may be made virtually ashless so that the user does not have to remove any ash during use. Preferred smoking articles which employ the substrate material of the present invention have a short combustible carbonaceous fuel element, alumina or carbon substrate modified in accordance with the present invention bearing an aerosol forming substance, an efficient insulating means, and a relatively long mouth end piece. The fuel element is provided with a plurality of longitudinally extending passageways which act to control the heat transferred from the burning fuel element to the aerosol generating means, thus preventing the thermal degradation of the aerosol former.
    公开号:SU1641182A3
    申请号:SU874202989
    申请日:1987-07-27
    公开日:1991-04-07
    发明作者:Кумар Банерджи Чандра；Кроутер Кей Деборах；Лонг Лехман Ричард
    申请人:Р.Дж.Рейнольдс Тобакко Компани (Фирма)；
    IPC主号:
    专利说明:


    S
    The invention relates to a smoking article comprising an aerosol generating agent comprising a substrate having a reduced retention capacity.
    The aim of the invention is to reduce the unpleasant taste in the smoke aerosol.
    The drawing shows the smoking article, the cut.
    The smoking article has a diameter of a conventional cigarette and contains a carbonaceous fuel cell 1 at the end of the burning, and on the opposite side - a mouthpiece 2 and a physically separated from negat means creating an aerosol that receives heat from the fuel cell and includes a substrate 3 carrying the aerosol-forming material. Substrate 3 includes an alpha form of alumina with a surface of 0.1–50 m2 / g and a pore diameter of 0.1–5 µm or carbon with a surface of 0.1–50 m2 / g.
    As carbon in the substrate can be used activated carbon, heat-treated
    Substrate 3, if made of carbon, may include an organic substance that blocks or modifies active sites or small pores to reduce its holding capacity, and the organic matter is selected from the group of substances, including tobacco extract, fructose or ethylcellulose. The fuel cell 1 has about seven longitudinal channels 4. The end of the fuel cell 1 facing the mouth, overlaps the metal patro 5, which is about 4.5 mm in diameter and about 30 mm long. The cartridge 5 contains the substrate material 3, which can enclose alumina or coal either in macroparticulate form or alternatively in the form of a rod.
    In addition, this substrate includes at least one aerosol-forming substance, such as propylene glycol or glycerin.
    The periphery of the fuel cell 1 in this product is surrounded by a jacket 6 of elastic insulating fibers (for example, glass fiber), and the cartridge 5 is surrounded by a jacket 7 of tobacco. The back of the chuck 5 is sealed and provided with two peaks 8 for passing aerosol-forming materials to the user.
    The mouthpiece 2 consists of an acetylcellulose cylinder 9 with a channel 10 for passing the aerosol and an acetylcellulose filter element 11 with a rough cleaning. This product (or its parts) is wrapped with one or more layers of tissue paper 12-18. In addition, the substrate may contain any porous material having the ability to retain the aerosol-forming material and release the vapor generated in the aerosol after heating and which has a reduced holding capacity.
    Modifying the substrate materials reduces the surface area and increases the average effective diameter of the torus (volume) of the substrate material, which results in a substrate having a reduced holding capacity for the aerosol former, which, in turn, helps to minimize the unpleasant taste that is present in smoking articles .
    Other suitable materials that may be modified according to the invention include: silicas, clays, such as vermiculite or bentonite, other inorganic oxides, sulfates, carbonates, and the like, mentioned, having an average pore diameter greater than about 0.05 micron-sec. coal and alumina are preferred.
    In one embodiment of the invention, the alumina is modified to reduce the retention capacity. The alumina supports can be in various forms, including porous monolithic solids, granular or extruded materials, fine powders or fibers.
    The use of activated carbon directly as a carrier of aerosol-forming materials in smoking articles has disadvantages. As a result of the presence of active centers, capillary forces, or other factors (both individually and collectively), the activated carbon binds the aerosol-forming materials too tightly. These binding | The forces in these centers can be so great that when exposed to heat (during lighting and smoking a smoking article) the unpleasant taste is formed in the mainstream. As a substrate, it is better to use a modified activated carbon having larger pores or a smaller surface area. With the proposed physicochemical modification, the indicated advantages of non-activated carbon as a carrier of aerosol-forming materials are retained.
    Heat treatment of activated carbon results in several modifications in the properties of activated carbon. For example, when activated carbon is modified by heat treatment at 2500 ° C for about 1 hour, the surface area decreases dramatically from about 1400 to 30 m2 / g. The reduction in surface area should reflect either a more ordered microcrystalline structure or a coalescence of smaller pores into larger pores, both individually and collectively. In order to physically or chemically modify activated carbon, it is necessary to add materials that modify or block, individually or collectively, active centers or small pores that have strong surface activity. Such modifications significantly improve the use of activated carbon as a substrate by minimizing or eliminating unpleasant taste. This approach is to block very small micropores or inactivate active sites that have high binding energy for the molecules of the aerosol-forming agent or aromatic additive. Such materials include tobacco extract, corn syrup, fructose, ethyl cellulose, and the like.
    The process of modifying activated carbon with such materials involves mixing this material with activated carbon in an appropriate solvent. The amount of material depends on the nature of the material used. When using tobacco extract, adding 1–10% by weight of tobacco extract to activated carbon significantly reduces the unpleasant taste. Fructose can be applied about 5–40%.
    0
    by weight, and ethylcellulose 0.5–5% by weight. Water is the preferred solvent for all of the blocking materials listed, except ethyl cellulose Ethyl alcohol is the preferred solvent when ethylcellulose is used.
    The use of ethyl cellulose is particularly useful as a modifying material, due to its insolubility in water, which prevents the absorption of aerosol
    5 leobrazuyuschih materials, such as glycerin, in the pores that were blocked.
    The impurity is aged to equilibrate for some time.
    0 A period of time sufficient for fine pores to be modified or blocked, individually or collectively. This material is incubated at a temperature of 10-50 ° C in
    5 for 5-60 minutes, preferably at about 2 ° C for 30 minutes. After that, the mixture is dried to a moisture content of less than about 5%, preferably less than about 3%, most preferably less than about 1%.
    An unpleasant taste in smoking articles that use unmodified substrate materials is felt as a result of the binding force that exists between the substrate material and the aerosol former. Strongly bound aerosol forming materials, such as glycerin, are more likely to form an undesirable unpleasant taste after smoking. of this product “Unmodified activated carbon binds glycerin too tightly, either due to a number of active sites present on activated carbon, or due to capillary forces resulting from the interaction of the aerosol former with the walls of small pores characteristic of activated carbon
    In addition, the use of porous-grade coal, t-from non-activated carbon, although not binding the aerosol former as tightly as activated carbon, results in the migration of the aerosol-forming agent to other components of the smoking article, due to its dissociation.
    0
    five
    0
    five
    0
    five
    relatively large pores and a smaller surface migra- tion of the aerosolizer, especially to the fuel source, gives undesirable unpleasant taste in the main stream and undesirable aroma in sidestream smoke.
    The modified substrate material in accordance with the invention overcomes such problems by lowering the substrate holding capacity in a controlled manner so as to reduce the unpleasant taste caused by strong bonding or the migration of the aerosol former to other components of the smoking article,
    Substrate materials modified in accordance with the invention undergo certain physical and chemical changes, including changes in pore size and surface area or a decrease in the reactivity of the substrate material due to the removal of certain reactive groups containing sulfur, oxygen and similar elements as individually and collectively. Moreover, such physicochemical changes help minimize or eliminate the unpleasant taste caused by tightly bound aeroz leobrazovatel E, and maintain sufficient binding energy to prevent migration of aerosol generator to other components of the article.
    After lighting, the fuel cell burns to form heat used to vaporize the aerosol-forming substance or substances in the aerosol-forming agent. Because the fuel cell is relatively short, the hot cone of the burning flame is always close to the aerosol-forming agent, which maximizes heat transfer to the aerosol-forming agent and the resultant aerosol formation, especially when the preferred heat transfer element is used.
    Due to the small size and burning characteristics of this fuel cell, it begins to burn over its entire length open to the flame for several hours. Thus, that part of the fuel cell adjacent to the aero
    Q 5
    0 5 0
    n c
    five
    0
    five
    to the solventer, it becomes fast hot, which significantly increases the heat transfer to the aerosol forming agent, especially during early and medium puffs. Due to the short length of the fuel cell, there is never a long fuel run that does not burn to act as a heat sink, as in known thermal aerosol products ho
    As a result of the fact that the aerosol-forming substance is physically separate from the fuel cell, it is exposed to significantly lower temperatures than the temperatures created by burning fuel, thereby minimizing the likelihood of its thermal destruction. This also results in the formation of an aerosol almost exclusively during the hardening with little or no aerosol formation from the aerosol-forming agent during smoldering.
    The aerosol-forming agent, which includes a modified substrate material and contains one or more aerosol-forming substances, spreads no more than 15 mm from the lighting end of the fuel cell. This aerosol-forming agent can vary in length from about 2 to 60 mm, preferably from 5 up to 40 mm and preferably from 2E to 35 mm. The diameter of the aerosol forming agent may vary from about 2 to B mm (preferably from about 3 to 6 mm).
    The aerosol-forming substance or substances used in the proposed smoking articles must necessarily have the ability to form an aerosol at the temperatures present in the aerosol-forming agent after heating with a hot fuel cell. Aerosol-forming agents are polyhydric alcohols or mixtures of polyhydric alcohols. More preferred aerosolizers are selected from glycerol, triethylene glycol and propylene glycol. This aerosol-forming substance can be dispersed on the modifications of the substrate material or within a concentration sufficient to impregnate this material or form a coating on it by using any known technical means .
    The thermally conductive material used as a cartridge for the aerosol forming agent is typically metal (aluminum) foil, varying in thickness from 0.01 to 0.1 mm or more. The thickness or type of conductive material, individually or collectively, may vary to actually achieve any desired degree of heat transfer.
    The insulating elements used in the preferred smoking articles are molded into an elastic jacket from one or more layers of insulating material. This jacket has a thickness of about 0.5 mm, preferably at least about 1 mm. Preferably, this jacket extends over half the length, if not the entire length of the fuel cell.
    Preferred in the current period of time, the insulating fiber is a ceramic fiber, such as fiberglass.
    In the most preferred smoking articles, fuel and aerosol-forming agents are attached to the mouthpiece, although the mouthpiece can be provided separately, for example, as a separate cigarette mouthpiece. This element of the product provides a shell that passes the aerosol-forming vapor into the channel formed by this shell. into the user's mouth. Due to its length (35-50 mm), it also prevents heat from the cone of the flame in the mouth and to the user's fingers and provides sufficient time to cool the hot spray before reaching the user.
    Preferred mouthpieces include an acetylcellulose tube, shown
    in the drawing. Other preferred tubes include a shortened cellulose acetate tube in combination with a longer non-woven fibrous polypropylene section, which can also function as a filter tip for a smoking article. Other suitable mouthpieces will be apparent to those skilled in the art.
    权利要求:
    Claims (4)
    [1]
    1. A smoking article containing a fuel cell placed at the end of the combustion and physically separated from it means creating an aerosol that absorbs heat from the fuel cell and includes a substrate that carries the aerosol-forming material, characterized in that, in order to reduce the unpleasant taste in smoke-shaped aerosol, the substrate includes an alpha form of alumina with a surface of 0.1–50 m2 / g and a pore diameter of 0.1–5 microns or carbon with a surface of 0.1–
    50 mg / g.
    [2]
    2. Product according to claim 1, characterized in that as carbon in the substrate, activated carbon is used that is subject to heat treatment,
    [3]
    3 „Product by PP. 1 and 2, that is, that the substrate made of carbon includes an organic substance that blocks or modifies active centers or small pores to decrease its holding capacity.
    [4]
    4. Product on PP. 1-3, characterized in that the organic matter is selected from the group of substances, including tobacco extract, fructose and ethylcellulose
    类似技术:
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    同族专利:
    公开号 | 公开日
    DD298203A5|1992-02-13|
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    HU202735B|1991-04-29|
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    YU150088A|1990-02-28|
    AU7607987A|1988-02-04|
    IL82748D0|1987-12-20|
    CN1013338B|1991-07-31|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/891,073|US4827950A|1986-07-28|1986-07-28|Method for modifying a substrate material for use with smoking articles and product produced thereby|
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