EA039732B1 - Warming sheet - Google Patents

Abstract

The purpose of the invention is to provide a warming sheet that does not tend to cause low-temperature burns and the fixing part of which does not tend to remain on clothing. The warming sheet of the invention has the following configuration. A warming sheet (1) equipped with a liquid-retaining and liquid-permeable skin contact sheet (7), a liquid-impermeable clothing contact sheet (11), and a fixing part (13) for fixing to clothing in that order, wherein the warming sheet (1) is characterized in that the warming sheet (1) includes a warming agent that activates TRP channels and a solvent, and does not include an exothermic agent.

Description

Technical field

The present invention relates to a sheet that produces a feeling of warmth.

State of the art

Thermal warming sheets are known which transfer heat to the user's body. For example, Patent Literature 1 describes a bag for housing an exothermic composition that contains moisture and generates heat in the presence of air; one side of said bag consists of a breathable multilayer structure obtained by layering a non-woven textile material and a porous film, and the other side is an adhesive surface having adhesive means, and the breathable multilayer structure has a positive value of the degree of change in size in the transverse direction at 50°C relative to the size at 20°C, and its compression energy is 0.15 kgf-cm ² or more.

Link List

Patent Literature.

Patent Literature 1. Japanese Patent Unexamined Publication No. 2006-239015.

The essence of the invention

Technical task

In the case of the package containing the exothermic composition described in Patent Literature 1, a metal powder oxidation reaction is used to transfer heat to the user. Therefore, when using a bag containing the exothermic composition, heat generation from the bag containing the exothermic composition carries the risk of low-temperature burn at the user's contact with the bag containing the exothermic composition. In addition, under the action of the generated heat and water vapor generated by the package containing the exothermic composition, the adhesive means that attach the package to the wearer's clothing are softened, so that when the package containing the exothermic composition is separated from the clothes after using the said package, containing an exothermic composition in order to be removed, the adhesives often remain on the clothing, resulting in contamination of the clothing by the adhesives.

Therefore, it is an object of the present invention to provide a heat-sensing sheet with a low possibility of low-temperature burn generation and a low probability of its attachment portion remaining on clothing.

The solution of the problem

The inventors of the present invention have invented a sheet that induces a sensation of warmth, comprising a skin-contacting sheet that retains liquid and is permeable to liquid; a garment-contact sheet impervious to liquid; and a fastening portion for attachment to clothing, in that order, wherein the heat inducing sheet comprises a heat inducing composition containing a heat inducing substance that activates a transient receptor potential channel (TRP channel) and a solvent and does not contain an exothermic substances.

Technical results of the invention

The heat-feeling sheet of the present invention is characterized by a low probability of producing a low-temperature burn and a low probability of its attachment part being left on the garment.

Brief description of the drawings

In FIG. 1 is a perspective view of an individual package 3 of a warm feeling sheet 3 in which a single warm feeling sheet 1 is packed according to the first embodiment.

In FIG. 2 is a perspective view of a warm feeling sheet 1 according to the first embodiment.

In FIG. 3 is a plan view of the warm feeling sheet 1 according to the first embodiment.

In FIG. 4 is a rear view of the warm feeling sheet 1 according to the first embodiment.

In FIG. 5 is an exploded perspective view of the warm feeling sheet 1 according to the first embodiment.

In FIG. 6 is a diagram for illustrating the warm feeling position of the sheet 1 when worn according to the first embodiment.

Implementation of the invention

In particular, the present invention relates to the following aspects.

Aspect 1.

A heat inducing sheet comprising a skin-contacting sheet that retains liquid and is permeable to liquid; a garment-contact sheet impervious to liquid; and a fastener portion for attaching to clothing, in that order, wherein the heat inducing sheet contains a heat inducing composition containing a heat inducing substance.

- 1 039732 a sensation of heat capable of activating the TRP channel, and a solvent and does not contain an exothermic substance.

Since the heat inducing sheet does not contain an exothermic agent but contains the above described heat inducing composition containing a heat inducing agent but does not contain an exothermic agent, it is possible to generate a warm sensation in the user without directly heating the user's skin from the outside. Therefore, by using the warm sensation sheet by attaching it to the wearer's clothing, it is possible to generate a sufficient warm sensation for the user while low-temperature burn is generated at the user's skin contact area that comes into contact with the warm sensation sheet with a substance that causes feeling of warmth. In addition, since the warm sensation sheet is capable of inducing a warm sensation to the user without directly heating the user's skin from the outside, there is a low possibility that the fastening portion becomes soft after using the warm sensation sheet by attaching it to the wearer's clothing, and there is a low possibility that the fastening part will remain on the garment when the heat-producing sheet is removed.

Aspect 2.

The warming sheet according to aspect 1, wherein the warming substance is a TRPV1 receptor agonist.

In this warm sensation sheet, the warm sensation substance is a TRPV1 receptor agonist, and therefore, by using the warm sensation sheet, it is possible for the user to feel a temperature exceeding 43°C, which is considered the temperature threshold for activation of the TRPV1 receptor. , and thus, it is possible to more easily create a feeling of warmth in the user. In addition, by activating the TRPV1 receptor by the heat sensing substance at the user's skin area contacting the heat sensing substance, heat is allowed to be generated at the user's skin area contacting the heat sensing substance, and thus , it is possible to increase the temperature of the user's skin area in contact with the heat-sensing substance by means of the sympathetic nervous system.

Aspect 3.

The warm sensation sheet according to aspect 1 or 2, wherein the skin-contacting sheet comprises a warm sensation composition.

In this warm feeling sheet, the skin contacting sheet which is in contact with the user's skin contains the above-described warm feeling composition, and therefore, by using the warm feeling sheet, it is possible to easily create a warm feeling for the user, starting from the initial stage of its wearing by the user after donning.

Aspect 4.

The warming sheet according to any one of aspects 1 to 3, wherein the warming composition contains a solvent in an amount of 50.0 to 99.9% by weight.

In this warm feeling sheet, the warm feeling composition contains the solvent in the above amount, and thus, by using the warm feeling sheet, it is possible to easily generate a warm feeling to the user from the initial step of wearing it by the user after putting on and on for a long period of time.

Aspect 5.

The warm sensation sheet according to any one of aspects 1 to 4, wherein the breathability of the skin-contacting sheet is higher than the breathability of the garment-contacting sheet.

When this warm feeling sheet is used, since the air permeability of the skin contact sheet is higher than that of the garment contact sheet, the solvent in the warm feeling composition migrates through the skin contact sheet to the outside, reducing the possibility of the solvent being exposed to the fastening part, and thus reducing the likelihood that the fastening portion will remain on the garment when the heat-producing sheet is removed. In addition, when heat or moisture such as sweat is initiated by the heat-producing substance, the wearer's skin area in contact with the warming substance is less likely to have heat and moisture such as sweat reach the fastening portion through the garment-contacting sheet, thereby reducing the likelihood of heat and moisture such as sweat being exposed to the fastening portion, and thereby reducing the likelihood that the fastening portion remains on the garment when the warm feeling sheet is removed.

Aspect 6.

The thermally inducing sheet according to any one of aspects 1-5, wherein the thermal conductivity of the skin-contacting sheet is lower than the thermal conductivity of the garment-contacting sheet.

In this heat-feeling sheet, since the thermal conductivity of the skin-contacting sheet is lower than the thermal conductivity of the garment-contacting sheet, when heat is generated at the skin portion of the wearer in contact with the warming substance, the likelihood of heat passing through the skin-contacting sheet and reaching the heat is reduced. the inner region of the heat sensation sheet, and hence the attachment portion of the heat sensation sheet. As a result, the fastening part is less likely to be exposed to heat, and therefore the fastening part is less likely to remain on the garment when the heat feeling sheet is removed.

Aspect 7.

A heat-sensing sheet according to any one of aspects 1-6, which further comprises an intermediate layer between the skin-contacting sheet and the garment-contacting sheet.

Since this heat-sensing sheet further comprises an intermediate layer between the skin-contacting sheet and the garment-contacting sheet, it is less likely that heat and moisture such as sweat generated on the skin area of the wearer contacting the heat-sensing substance will pass through the skin-contacting sheet and reach the interior of the heat-feeling sheet and hence the attachment portion of the warming sheet, thereby reducing the likelihood of heat and moisture, such as sweat, being exposed to the attachment portion, and thus reducing the likelihood that that the fastening part will remain on the garment when the heat-producing sheet is removed.

Aspect 8.

The warm feeling sheet according to aspect 7, wherein the breathability of the intermediate layer is higher than the breathability of the garment contacting sheet.

In this warm feeling sheet, since the air permeability of the intermediate layer is higher than that of the garment contact sheet, the solvent contained in the warm feeling composition migrates through the skin contact sheet to the outside, reducing the possibility of the solvent being exposed to the fastening portion and thus reducing the likelihood that the fastening portion will remain on the garment when the heat-producing sheet is removed. In addition, when the heat-producing substance initiates the generation of heat or moisture such as sweat, the area of the wearer's skin contacting the heat-sensing substance is less likely that heat and moisture, such as sweat, will reach the attachment portion. through the garment-contacting sheet, and thus the fastening portion is less likely to remain on the garment when the sheet causing the warm feeling is removed.

Aspect 9.

The warming sheet according to aspect 7 or 8, wherein the thermal conductivity of the intermediate layer is lower than the thermal conductivity of the garment contact sheet.

In this warm feeling sheet, since the thermal conductivity of the intermediate layer is lower than the thermal conductivity of the garment contacting sheet, it is less likely that heat generated at the skin area of the wearer in contact with the warm feeling substance will pass through the skin contacting sheet. sheet and reach the fixing part of the warming sheet, thereby reducing the possibility of exposure to solvent, moisture, and the like. onto the fastening part, and thus the probability that the fastening part remains on the garment when the heat feeling sheet is removed is reduced.

Aspect 10.

The warm sensation sheet according to any of the aspects 1 to 9, wherein the warm sensation composition and the fastening portion are located at overlapping locations in the thickness direction of the warm sensation sheet.

In this warm feeling sheet, since the warming composition and the fastener portion are located at overlapping positions in the thickness direction of the warm feeling sheet, it is easier to keep the warm feeling composition in contact with the user's skin while making it less likely that the fastening part will remain on the clothes after using the warming sheet.

Aspect 11.

The heat inducing sheet according to any one of aspects 1-10, wherein the solvent is selected from the group consisting of water, alcohol, and fats and oils, and any combinations thereof.

Since the solvent for the heat-sensing sheet is selected from the above group, the warm-sensing substance enables a warm sensation to be rapidly generated in the user's skin.

Next, the warm sensation sheet according to the present invention will be described in detail.

- 3 039732

In FIG. 1-6 are views illustrating an individual pack 3 of a warming sheet in which a separate sheet 1 is packaged to induce a feeling of warmth according to one embodiment (referred to herein as the first embodiment) of the present invention. More specifically, in FIG. 1 shows a perspective view of an individual package 3 of a sheet 1 that causes a feeling of warmth. In FIG. 2 shows a perspective view of a sheet 1 giving a feeling of warmth. In FIG. 3 and 4 show respectively a plan view and a rear view of a heat-sensing sheet 1. In FIG. 5 is an exploded perspective view of a sheet 1 giving a feeling of warmth. In FIG. 6 is an image for illustrating the warm feeling position of the sheet 1 when worn. In the context of this document, the term "individual pack" of a heat-producing sheet may also be used in the simplified form "individual pack".

The warm feeling sheet 1 according to the first embodiment comprises a skin-contact sheet 7 that retains liquid and is liquid-permeable; intermediate layer 9; a garment contact sheet 11; a fastening part 13 for attaching the warm feeling sheet 1 to clothes, and a release sheet 15 for temporarily fastening the fastening part 13, in that order, and has a length direction L, a width direction W, and a thickness direction T. The skin contact sheet 7 contains a warming composition (not shown) over the entire surface of the skin contact sheet 7. The skin contact sheet 7 also has a skin contact surface 31 and a non-skin contact surface 33.

In this warm feeling sheet 1, each of the following members: the skin contact sheet 7, the intermediate layer 9, the clothing contact sheet 11 that is liquid impermeable, and the release sheet 15 have the same plan (in the L direction of the length and direction W width) shape of the outer edge, and the skin-contacting sheet 7, the intermediate layer 9, the clothing-contacting liquid-impervious sheet 11, and the release sheet 15 are superimposed on each other so that their outer edges are superimposed on each other in the direction T thickness.

The warm feeling sheet 1 has a fold axis F central in the length direction L and parallel to the width direction W. Meanwhile, in the individual package 3, the warm feeling sheet 1 is folded along the fold axis F so that the skin-contacting surface 31 of the skin-contacting sheet 7 faces inward, and is wrapped in the packing sheet 5.

The fastening part 13 is composed of a plurality of fastening sections 14. Each of said plurality of fastening sections 14 extends in the width direction W, reaching both ends of the warm feeling sheet 1 in the width direction W. The specified set of fastening parts 14 is located at predetermined intervals in the direction L of the length.

The release sheet 15 has the same outer edge shape as the garment contact sheet 11 and is positioned to cover the entire fastening portion 13 (a plurality of fastening sections 14).

As shown in FIG. 1, the warm feeling sheet 1 is folded in half and wrapped in a packing sheet 5 to form an individual package 3. More specifically, the individual package 3 is formed by using two packing sheets 5 between which the warm feeling sheet 1 is folded in half along the fold axis F so that the skin-contact surface 31 of the skin-contact sheet 7 faces inward, and the sealing sections 101 are formed on the peripheral edges of the two packaging sheets 5.

The user unpacks the individual pack 3 starting at the notches 103 in the individual pack 3 of the warm sensation sheet 1, removes the warm sensation sheet 1 from the individual package 3 and tears the release sheet 15 from the warm sensation sheet 1. Then, as shown in FIG. 6, the user attaches the fastening portion 13 of the warm sensation sheet 1 to the inside of the garment 21, more specifically the underpants, and uses the warm sensation sheet 1 in a state where the skin contacting surface 31 of the warm sensation sheet 1 is contact with the user's skin.

As shown in FIG. 3 and 4, the warm sensation sheet 1 has peripheral edges 25, which are portions within a predetermined distance from the outer perimeter 23 of the warm sensation sheet 1. The warm feeling sheet 1 does not have relief portions on the outer edges 25. Thus, there is a low possibility that the user will feel hardness on the outer edges 25 of the warm feeling sheet 1, and the warm feeling sheet 1 creates a comfortable feeling when its wearing both in the initial period and throughout its use.

The entire surface of the skin-contacting sheet 7 in the warm sensation sheet 1, including the outer edges 25, is coated with a warm sensation composition (not shown). In other words, the warm sensation sheet 1 contains a warm sensation composition (not shown) on the outer edges 25. Thus, the warm sensation composition is able to effectively activate the TRP channels on the user's skin contact area. 4 039732 with a warm feeling property, which makes it possible to effectively create a warm feeling for the user.

Sheet 1, which causes a feeling of warmth, does not contain an exothermic substance. In a thermal warming sheet containing an exothermic substance, the exothermic substance must be kept in contact with the user's skin for a long time, and generally the fastening part is located in a position overlapping with the exothermic substance in the thickness direction, whereby the temperature of the fastening part rises under the action of the exothermic substance, and the fastening part softens. As a result, when the use of the thermal warming sheet is completed and the thermal warming sheet is removed from the garment, the softened fastening portion generally remains on the garment.

In contrast, when using the warm sensation sheet 1 of the first embodiment, since the warm sensation sheet 1 does not generate heat by itself, the fastening portion of the warm sensation sheet 1 is less likely to be softened, and when the use of the warm sensation sheet 1 is completed and the warm sensation sheet 1 is removed from the garment 21, ensuring that the fastener portion 13 remains on the garment 21 is low.

In the warming sheet of the present invention, the warming composition contains a warming agent that activates TRP channels and a solvent. The warming agent is not particularly limited as long as it activates TRP channels, and may be, for example, a TRPV1 receptor agonist or a TRPV3 receptor agonist, with a TRPV1 receptor agonist being preferred. This is because the TRPV1 receptor has a high temperature activation threshold of over 43°C and is able to very effectively create a feeling of warmth in the user.

The TRP channels activated by a heat sensing agent may be human TRP channels.

Examples of warming substances that cause a feeling of warmth include capsicoside, capsaicin, capsaicinoids (dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin, nonivamide, etc.), capsanthin, benzyl nicotinate, β-butoxyethyl nicotinate, N-acylvanilamide, nonanoic acid vanillamide, polyhydric alcohols, red pepper powder, red pepper solution, nonanoic acid vanilla ether, vanilla alcohol alkyl ether derivatives (e.g. vanilla ethyl ether, vanilla butyl ether, vanilla pentyl ether and vanilla hexyl ether), isovanyl alcohol alkyl ethers, ethylvanillyl alcohol alkyl ethers, veratryl alcohol derivatives, substituted benzyl alcohol derivatives, substituted benzyl alcohol alkyl ethers, vanillin propylene glycol acetate, ethylvanillin propylene glycol acetate, ginger extract, ginger oil, gingerol, zingerone and any combination of the above wow.

The warming agent is preferably a plant-derived compound for reasons of safety for the user.

The warming composition contains a warming agent in an amount preferably from 0.0001 to 5.0 wt.%, more preferably from 0.0005 to 3.0 wt.%, even more preferably from 0.1 to 1.0 wt.% and even more preferably from 0.3 to 0.7 wt.%. This is due to the requirement of the effectiveness of the substance that causes a sensation of heat.

The solvent may be water, alcohol, fat or oil, or any combination thereof. The warming composition contains the solvent in an amount preferably from 50.0 to 99.9% by weight, more preferably from 90.0 to 99.9% by weight. Thus, by using a sheet having a warm feeling, it will be possible to easily create a warm feeling for the wearer from an early stage of wearing after attachment and for a long period of time thereafter.

Said alcohol may be a lower alcohol such as methanol, ethanol, ethylene glycol or glycerol, or a higher alcohol such as caprylic alcohol, lauryl alcohol or myristyl alcohol. Fats or oils include fatty acid esters such as triglyceride and natural oils such as coconut oil and linseed oil.

The warming composition may also include, in addition to the warming agent and solvent, one or more of the other ingredients listed below in amounts that do not reduce the effectiveness of the warming sensation to the user.

Examples of said one or more components include silicone oils, silicones, silicone-based resins, and the like.

Examples of said one or more other components also include antioxidants such as BHT (2,6-di-tert-butyl-p-cresol), BHA (butylated hydroxyanisole), and propyl gallate.

Additional examples of said one or more other components include vitamins, such as natural vitamins and synthetic vitamins. Examples of vitamins include water-soluble vitamins such as B vitamins, including vitamin B1, vitamin B2, vitamin B3,

- 5 039732 vitamin B4, vitamin B5, vitamin B6, vitamin B7, vitamin B9 and vitamin B12 and vitamin C.

Other examples of vitamins include fat-soluble vitamins such as the A vitamins, D vitamins, E vitamins, and K vitamins.

Also included are derivatives of these vitamins.

Examples of said one or more other components also include amino acids such as alanine, arginine, lysine, histidine, proline and hydroxyproline, and peptides.

Other examples of said one or more other components include a zeolite such as a natural zeolite, examples of which include analcite, chabazite, heulandite, natrolite, stiblit and thomsonite, and synthetic zeolite. Other examples of said one or more other components include cholesterol, hyaluronic acid, lecithin, ceramide, placenta, collagen, elastin, squalane, petrolatum, and trehalose.

Other examples of said one or more other components include drugs such as skin tightening agents, acne medications, anti-wrinkle agents, cellulite agents, skin whitening agents, bactericidal agents, and antifungal agents.

Examples of skin tightening agents include zinc oxide, aluminum sulfate, tannic acid, and the like. and oil-soluble skin tightening agents such as fat-soluble polyphenols. Fat-soluble polyphenols include natural fat-soluble polyphenols such as barley extract, St. . Juglans regia, var. orientalis), hibiscus extract, Japanese loquat leaf extract, Miquel's linden extract, hop extract, horse chestnut extract, and Cossack extract.

Examples of acne medicines include salicylic acid, benzoyl peroxide, resorcinol, sulfur, erythromycin, and zinc.

Examples of anti-wrinkle agents include lactic acid, salicylic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid, and lysophosphatidic acid.

Examples of anti-cellulite agents include xanthine compounds such as aminophylline, caffeine, theophylline and theobromine.

Examples of skin whitening agents include niacinamide, kojic acid, arbutin, glucosamine and its derivatives, phytosterol derivatives and ascorbic acid and its derivatives, as well as mulberry extract and placenta extract.

Examples of said one or more other ingredients also include anti-inflammatory ingredients, pH adjusters, germicides, humectants, fragrances, colorants, pigments, and plant extracts. Examples of anti-inflammatory ingredients include plant-derived anti-inflammatory agents such as extracts of peony, yellowish trichaetes, St.

Examples of pH adjusters include those that maintain a slightly acidic skin reaction such as malic acid, succinic acid, citric acid, tartaric acid, and lactic acid.

An example of a pigment is titanium oxide.

The warming composition and the warming sheet do not contain an exothermic substance. Therefore, the warm sensation sheet itself does not generate heat, the fastening portion of the warm sensation sheet has a low probability of softening, and when the use of the warm sensation sheet is completed and removed from the clothing, there is a low probability that that the fastening part of the heat-producing sheet will remain on the garment.

Such exothermic substances are not particularly limited as long as they are exothermic substances that themselves generate heat, and examples thereof may include those that use chemical energy such as the heat of oxidation of metal powders (for example, iron powder), heat neutralization of acids and alkalis or heat of hydration of inorganic salts.

The warming composition and the warming sheet may also contain a cooling agent such as a TRPM8 receptor agonist or a TRPA1 receptor agonist.

The heat inducing sheet according to the present invention comprises a heat inducing composition with a density such that the density of the warm inducing substance is 0.001 to 10 g/m ² , more preferably 0.003 to 5 g/m ² , still more preferably 0.01 to 2.5 g/m ² , and even more preferably 0.05 to 1.5 g/m ² . This is due to the need to create a feeling of warmth in the user.

In case the heat-sensing sheet according to the present disclosure does not contain

- 6 039732 additional sheet between the skin-contact sheet and the garment-contact sheet, the warming composition is included in the skin-contact sheet. In the case where the heat inducing sheet according to the present invention comprises an additional sheet, such as an intermediate sheet between the skin contact sheet and the garment contact sheet, the warming composition may be included in said additional sheet. Based on the need to create a feeling of warmth immediately after the start of use of the sheet that causes a feeling of warmth, the composition that causes a feeling of warmth is preferably included in at least the skin-contacting sheet.

In the warm feeling sheet of the present invention, the air permeability of the skin-contacting sheet is preferably higher, more preferably at least 300 cm ³ /cm ² /s or more, even more preferably at least 500 cm ³ /cm ² /s or more higher, and even more preferably at least 700 cm ³ /cm ² /s or more higher than the air permeability of the garment-contacting sheet. In this way, the solvent contained in the warming composition will be allowed to migrate through the skin-contacting sheet to the outside, thereby reducing the likelihood that the fastening portion will be exposed to the solvent and thus reducing the likelihood that the fastening portion will remain on the garment when removed. a leaf that evokes a feeling of warmth. In addition, when heat or moisture such as sweat is initiated by the action of the heat-producing substance, the user's skin area in contact with the heat-sensing substance is provided with a low probability that heat and moisture such as sweat will reach of the fastening part through the garment contacting sheet, thereby reducing the likelihood of heat and moisture such as sweat being exposed to the fastening part, and thus reducing the likelihood that the fastening part remains on the garment when the warm feeling sheet is removed.

The skin-contacting sheet has an air permeability of preferably 300 to 2000 cm ³ /cm ² /s, more preferably 500 to 1500 cm ³ /cm ² /s, and even more preferably 700 to 1300 cm ³ /cm ² /s. This is due to the requirement to ensure that the solvent contained in the warming composition is released through the skin-contacting sheet.

The garment contact sheet has an air permeability of preferably 0 to 500 cm ³ /cm ² /s, more preferably 0 to 300 cm ³ /cm ² /s, and even more preferably 0 to 50 cm ³ /cm ² /s. This is due to the requirement to reduce the likelihood that the solvent contained in the warming composition, as well as moisture, such as sweat, formed on the area of the skin of the user in contact with the warming substance, will reach the fastening part.

The air permeability related to the present disclosure is measured as follows using a KES-F8-AP1 air permeability meter from Kato Tech Corp.

(1) Air permeability tester A KES-F8-AP1 and samples are kept in a room with constant temperature and humidity (temperature: 25±5°C, relative humidity: 65±5%) for 24 hours.

(2) Measure the airflow resistance value of the sample at a piston speed of 2 cm/s.

(3) The measurement is repeated 5 times for different samples, and the average value is recorded as the R value (kPa*s/m) of the airflow resistance of the sample.

(4) The airflow resistance value R is converted to air permeability AP (cm ³ /cm ² /s) using the following formula:

AR (cm ³ / cm ² / s) \u003d 12.5 / R.

In the case where the heat-sensing sheet according to the present invention further comprises an intermediate layer between the skin-contacting sheet and the garment-contacting sheet, the air permeability of the intermediate layer is preferably higher, more preferably at least 300 cm ³ /cm ² /s or more higher. , even more preferably at least 500 cm ³ /cm ² /s or more and even more preferably at least 700 cm ³ /cm ² /s or more than the air permeability of the garment-contacting sheet. In this way, the solvent contained in the warming composition will be allowed to migrate through the skin-contacting sheet to the outside, thereby reducing the likelihood that the fastening portion will be exposed to the solvent and thus reducing the likelihood that the fastening portion will remain on the garment when removed. a leaf that evokes a feeling of warmth. In addition, when heat or moisture such as sweat is initiated by the action of the heat-producing substance, the user's skin area in contact with the heat-sensing substance is provided with a low probability that heat and moisture such as sweat will reach of the fastening part through the garment contacting sheet, thereby reducing the likelihood of heat and moisture such as sweat being exposed to the fastening part, and thus reducing the likelihood that the fastening part remains on the garment when the warm feeling sheet is removed.

The intermediate layer has an air permeability preferably from 50 to 2000 cm ³ /cm ² /s, more

- 7 039732 preferably from 100 to 1500 cm ³ /cm ² /s and even more preferably from 150 to 1300 cm ³ /cm ² /s. This is due to the need to ensure that the solvent contained in the warming composition, as well as the heat generated at the site of contact with the warming substance, is removed from the skin-contacting sheet.

In the heat-feeling sheet of the present disclosure, the thermal conductivity of the skin-contacting sheet is preferably lower than the thermal conductivity of the garment-contacting sheet. Thus, it is less likely that the heat generated at the user's skin contact area with the heat-sensing substance will pass through the skin-contacting sheet and reach the interior of the heat-sensing sheet and hence the fastening portion of the heat-sensing sheet. a feeling of warmth, and as a result, the possibility that the fastening part remains on the garment when the sheet causing the feeling of warmth is removed is reduced.

The thermal conductivity referred to in this document is measured by the temperature gradient method as a variation of the steady state method.

More specifically, one side of the sample is heated with a stainless steel rod while the other side of the sample is cooled with a copper rod, resulting in a temperature gradient in the sample thickness direction at steady state, and by dividing the amount of migrating heat by the temperature difference calculate the specific thermal conductivity.

In the case where the heat-sensing sheet according to the present invention further comprises an intermediate layer as an additional layer between the skin-contacting sheet and the garment-contacting sheet, the thermal conductivity of the intermediate layer is preferably lower than the thermal conductivity of the garment-contacting sheet. Thus, it is less likely that the heat generated at the user's skin contact area with the heat-sensing substance will pass through the skin-contacting sheet and reach the interior of the heat-sensing sheet and hence the fastening portion of the heat-sensing sheet. a feeling of warmth, thereby reducing the likelihood of solvent and moisture attacking the fastening part and, consequently, reducing the likelihood that the fastening part will remain on the garment when the warm feeling sheet is removed.

The skin-contacting sheet material in the warm sensation sheet of the present invention is not particularly limited as long as it has a liquid retention property and is liquid permeable (preferably liquid permeable with respect to said warm sensation composition), and it may be a textile material such as, for example, a non-woven textile material, a woven textile material or a knitted textile material, the non-woven textile material being preferred from a manufacturing point of view.

Examples of nonwoven textiles include air-spun nonwoven, breathable nonwoven textile, spunbond nonwoven textile, spot welded nonwoven textile, spunlace nonwoven textile, needle punched nonwoven textile, and meltblown nonwoven textile, as well as combinations of the above, such as SMS (Spun-Melt-Spun, a non-woven textile material created by mixing spunbond and meltblown materials).

Examples of fibers for making nonwoven textiles include natural fibers, synthetic fibers and semi-synthetic fibers. The natural fibers mentioned above include cellulose fibers and regenerated cellulose fibers.

The above-mentioned regenerated cellulose fibers may be viscose fibers such as viscose silk obtained from viscose, polynosic and modal, or copper ammonia silk fibers obtained from a copper ammonia solution of cellulose (also known as cupra); or lyocell or tencel, which are obtained by spinning from an organic solution, which is a mixed solution of organic compounds and water, without intermediate preparation of cellulose derivatives.

The aforementioned semi-synthetic fibers may be, for example, semi-synthetic cellulosic fibers such as acetate fibers, such as triacetate fibers and diacetate fibers.

Examples of synthetic fibers include fibers formed from thermofusible fibers such as polyolefin-based polymers such as polyethylene and polypropylene; polyester based polymers, for example terephthalate based polymers such as polyethylene terephthalate (PET), polybutylene terephthalate and polypentylene terephthalate; polyamide-based polymers such as nylon 6 and nylon 6,6; acrylic polymers; polymers based on polyacrylonitrile and their modified forms, as well as combinations of the above.

The skin-contacting sheet has a density preferably from 10 to 100 g/cm ² , more preferably from 20 to 50 g/cm ² .

The skin-contacting sheet is preferably non-adhesive to the skin-contact surface and, for example, preferably does not contain a contact adhesive.

The material of the garment contact sheet in the warm feeling sheet of the present invention is not particularly limited as long as it is liquid-impermeable, and for example, it may be a film such as a polyethylene or propylene film, a breathable resin film. , a breathable resin film bonded to a nonwoven textile material such as spunbond or spunlace, or a multilayer textile material such as SMS.

The garment contact sheet has a density of preferably 10 to 50 g/m ² and more preferably 15 to 30 g/m ² .

In the case that the heat-sensing sheet according to the present invention further comprises an interlayer as an additional layer between the skin-contact sheet and the garment-contact sheet, the interlayer may be a sheet or an absorbent structure known in the sanitary field. .

In case the intermediate layer is a sheet, i.e. intermediate sheet, the material of this intermediate sheet may be a textile material such as non-woven textile material, woven textile material or knitted textile material. The intermediate sheet material is preferably a textile material, such as a non-woven textile material, a woven textile material or a knitted textile material, which is made of cellulose fibers, and more preferably it is a fabric composed of cellulose fibers, or textile material obtained by dry air spinning. The intermediate sheet preferably does not contain a polymeric absorbent.

In the case that the intermediate layer is an absorbent structure, the absorbent structure may be a structure in which an absorbent core containing cellulose fibers and a polymeric absorbent is covered with an insulating layer, a structure in which an absorbent core containing a high molecular weight absorbent, or an absorbent core consisting made of high molecular weight absorbent, covered with an insulating layer, etc. The insulating layer may be the intermediate sheet described above.

The intermediate layer has a density preferably from 10 to 200 g/m ² and more preferably from 15 to 150 g/m ² .

In case the intermediate layer contains a polymeric absorbent, the polymeric absorbent absorbs the warming agent and the solvent, in particular water, contained in the warming composition, thus preventing the entire warming composition from being exposed to the skin at once. and allowing stable activity of the heat-sensing substance over a long period of time.

The attachment part of the heat-sensing sheet according to the present invention may be a hot melt adhesive, examples of which include a contact adhesive and a heat-sensitive adhesive mainly composed of rubber-based compounds such as styrene-ethylene-butadiene-styrene (SEBS), styrene- butadiene-styrene (SBS) or styrene-isoprene-styrene (SIS), or consisting mainly of compounds based on olefins, such as linear low density polyethylene; and a water-sensitive adhesive containing water-soluble polymers (such as polyvinyl alcohol, carboxymethylcellulose, and gelatin) or water-swellable polymers (such as polyvinyl acetate and sodium polyacrylate).

In the first embodiment, the skin-contacting sheet 7, the intermediate layer 9, the liquid-impermeable garment-contacting sheet 11, and the release sheet 15 all have the same outer edge shape in the planar direction (length direction L and width direction W), however, instead, the skin contact sheet, the interlayer, the liquid impermeable garment contact sheet, and the release sheet 15 in the warm feeling sheet according to the disclosure of the present invention may all have different outer edge shapes.

The warm sensation sheet according to the present invention is preferably wrapped in a wrapping sheet. More specifically, the warm sensation sheet of the present invention is preferably included in a package containing one or more warm sensation sheets wrapped in a wrapping sheet, and more preferably in an individual package with a single warm sensation sheet wrapped. on the packing list.

Examples of the packaging sheet material include polyolefin-based polymers such as polyethylene and polypropylene. The packaging sheet preferably contains an airtight layer due to the need to increase the airtightness of the individual package, and examples of the material of said airtight layer include ethylene-vinyl alcohol copolymers and vinylidene chloride-based polymers such as vinylidene chloride-methyl acrylate copolymer, polyvinyl alcohol, nylon such as nylon 6, aluminum foil; and a material in which a base film (such as a polyethylene terephthalate film) is coated with aluminum oxide,

- 9 039732 silicon, etc.

The warm feeling sheet according to the present invention is a sheet attached to clothes and includes a fastening part for attaching to clothes, located on the clothes contacting surface of the liquid-impervious clothing contacting sheet, and used by fixing this fastening part on the inside side of the clothes. Said clothing is not particularly limited as long as it has a part that is in direct contact with the wearer's skin, and it may be clothing that fits well on the wearer's body when in use. Examples of such garments include undergarments (such as briefs, tank tops, and bras), outerwear (such as upper body garments and lower body garments), as well as gloves, scarves, face masks, sleep masks, and the like. .

The place where the warm feeling sheet of the present invention can give a warm feeling is not particularly limited; for example, it may be the head (for example, the face, in particular the eye area), the neck, the upper body (for example, the chest area, the abdomen, the groin area, the back and buttocks, the lumbar area, the shoulders, forearms, or hands), or lower body (for example, thighs, shins or feet).

Examples

The present invention will be further explained in more detail with examples, with the understanding that the present invention is not limited to these examples.

Production example 1.

The No. 1 warm feeling sheet was produced according to the first embodiment. More specifically, breathable non-woven textile material (density 30 g/m ² ) as the skin-contact sheet, dry-air formed textile material (density 100 g/m ² ) as the intermediate layer, and polyethylene film (density 24 g/cm ² ) were bonded together with a hot melt adhesive, then an aqueous solution containing 0.3% by weight of vanilla butyl ether as a warm sensation composition was applied to the entire surface of the skin contact sheet, so that the vanilla reached 0.1 g/m ² , and thus sheet No. 1 was produced, causing a feeling of warmth.

Example 1 and Comparative Example 1.

Trial participants who were asked to try the No. 1 Warm Sheet and the No. 1 Thermal Warm Sheet reported that the No. 1 Warm Sheet was softer and more comfortable to wear than the No. 1 Thermal Warm Sheet. reported that sheet No. 1, causing a feeling of warmth, creates an excellent feeling of warmth.

List of reference designations:

- a leaf that causes a feeling of warmth,

- individual packing,

- packing list,

- skin contact sheet,

- intermediate layer

- clothing contact sheet,

- mounting part

- mounting section

- anti-adhesion sheet,

- clothes,

- outside perimeter

- outer edge

- surface in contact with the skin,

- surface not in contact with the skin.,

101 - sealing section,

103 - notch,

L - length direction,

W - width direction,

T - thickness direction,

F - bend axis.

Claims (13)

1. A heat-sensing sheet comprising a skin-contact sheet that retains liquid and is permeable to liquid; an absorbent structure comprising an insulating layer; a garment-contact sheet impervious to liquid; and a fastening part for attaching to clothing, in that order, - 10 039732 wherein the heat inducing sheet comprises a heat inducing composition comprising a heat inducing substance capable of activating a transient receptor potential channel (TRP channel) and a solvent, the solvent being selected from the group consisting of alcohol, consisting of ethylene glycol, caprylic alcohol, lauryl alcohol and myristyl alcohol, water and fats or oils, as well as any combinations thereof. 2. The warming sheet according to claim 1, wherein the absorbent structure comprises a polymeric absorbent. 3. A heat-sensing sheet comprising a skin-contact sheet that retains liquid and is permeable to liquid; an absorbent structure comprising a polymeric absorbent and cellulose fibers, a garment-contact sheet impervious to liquid; and a fastening portion for attaching to clothing, in that order, wherein the heat inducing sheet comprises a heat inducing composition containing a heat inducing substance capable of activating a transient receptor potential (TRP) channel, and a solvent, wherein the solvent is selected from the group consisting of an alcohol consisting of ethylene glycol, caprylic alcohol, lauryl alcohol and myristyl alcohol, water and fats or oils, and any combinations thereof. 4. The warming sheet according to claim 1 or 3, wherein the warming substance is a TRPV1 receptor agonist. 5. The warming sheet according to claim 1 or 3, wherein the skin-contacting sheet contains a warming composition. 6. The warming sheet according to claim 1 or 3, wherein the warming composition contains a solvent in an amount of 50.0 to 99.9% by weight. 7. The warm sensation sheet according to claim 1 or 3, wherein the breathability of the skin-contacting sheet is higher than the breathability of the garment-contacting sheet. 8. The heat-sensing sheet according to claim 1 or 3, wherein the thermal conductivity of the skin-contacting sheet is lower than the thermal conductivity of the garment-contacting sheet. 9. A warming sheet according to claim 1 or 3, also comprising an intermediate layer between the skin-contacting sheet and the garment-contacting sheet. 10. The warm sensation sheet according to claim 1 or 3, wherein the breathability of the intermediate layer is higher than that of the garment contact sheet. 11. The heat-sensing sheet according to claim 1 or 3, wherein the thermal conductivity of the intermediate layer is lower than the thermal conductivity of the garment-contacting sheet. 12. The warm feeling sheet according to claim 1 or 3, wherein the warm feeling composition and the fastening portion are located at overlapping locations in the thickness direction of the warm feeling sheet. 13. A sheet that causes a feeling of warmth, containing a sheet in contact with the skin, retaining liquid and permeable to liquid; an absorbent structure comprising a polymeric absorbent, a liquid-impermeable garment-contact sheet; and a fastening portion for attaching to clothing, in that order, wherein the heat inducing sheet comprises a heat inducing composition containing a heat inducing substance capable of activating a transient receptor potential (TRP) channel, and a solvent, wherein the solvent is selected from the group consisting of an alcohol consisting of ethylene glycol, caprylic alcohol, lauryl alcohol and myristyl alcohol, water and fats or oils, and any combinations thereof.