JP3188586B2 - Hot patch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot patch such as a disposable body warmer, a hot shipping agent, a hot plaster and the like for medical or medical use, home use, and leisure use. More specifically, there is provided a reinforcing portion formed on a side or a corner of the protective layer adhered over substantially the entire surface of the heat generating component agent or over the entire surface of the pressure-sensitive adhesive layer partially or in a frame shape or the like. Also, the present invention relates to a highly convenient heat-resistant patch which enables even an elderly person to peel off the protective layer from the pressure-sensitive adhesive layer very easily just by flipping the formation portion of the reinforcing portion with a fingertip.

[0002]

2. Description of the Related Art In recent years, an aging society has progressed, and low back pain, elbow pain,
There is a tendency for more people to complain of symptoms such as knee pain and shoulder pain. Therefore, hot patches by symptomatic treatment are often used. As the hot patch, a pressure-sensitive adhesive layer is spread on a heating member such as a heat-shipping agent, a heat plaster, a disposable body warmer, and a protective layer such as polyethylene or polypropylene is used to protect the pressure-sensitive adhesive layer. . Hereinafter, a conventional hot patch will be described. FIG. 5A is a perspective view of a conventional hot patch, and FIG.
It is a line sectional view. Reference numeral 10 denotes a conventional hot patch, 11 denotes a heating member made of a heat-shipping agent, a heat plaster, a disposable body warmer, etc., 11a denotes iron powder, reduced iron powder, activated carbon, alumina, silica gel, charcoal, water-absorbing polymer, sodium chloride, Potassium chloride, magnesium chloride, iron chloride, acetic acid,
A chemical exothermic agent prepared by appropriately mixing and formulating exothermic materials such as chloroacetic acid, water and an acrylic water-absorbing polymer.
a, a permeable bag film made of a synthetic resin, synthetic fiber, natural fiber, or the like constituting the flat bag member 11b; 11d, a reinforcing film for reinforcing the permeable film 11c; Is the adhesive layer, 13 is the adhesive layer 12
1 adhered to one surface of the flat bag 11b through
A pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive 3a and a pressure-sensitive adhesive 13b spread on a support 13a; a thin film or sheet 14 having an extremely thin flexibility adhered in close contact with the entire surface of the pressure-sensitive adhesive layer 13; It is a protective layer made of foil or the like. The method of using the hot patch constructed as described above will be described below. First, the adhesive layer 13 and the protective layer 14 are easily peeled off by repeatedly searching the corners of the hot patch 10 with nails.
After peeling off the protective layer 14 with a nail, and then peeling off the protective layer 14 while paying attention so that the heat-generating member 11 is not kinked and the pressure-sensitive adhesive layers are not entangled, the heat-generating member 11 is attached to an affected part or It was used by attaching it to the surface of underwear such as a shirt.

[0003]

However, in the above-mentioned conventional construction, most of the hot patches have a white or white transparent pressure-sensitive adhesive layer spread on the upper surface of a one-color support made of white or the like. Since the surface is covered with a protective layer made of a very thin and flexible transparent film, it is difficult to distinguish between the protective layer and the pressure-sensitive adhesive layer. I was Further, since the protective layer and the heat-generating member have the same shape and the same size, there is a problem that the fingertip does not work well even when the fingertip is put on the tip of the protective layer. Furthermore, since the pressure-sensitive adhesive layer uses a thickener and the like having a thickening action, the pressure-sensitive adhesive is extremely strong, and a thin protective layer is closely adhered to the pressure-sensitive adhesive layer having the tackiness, Even if a patient tries to apply it to the affected area, the protective layer is difficult to peel off, and it is time-consuming and often frustrating to peel off the protective layer. Was. Especially for elderly people, the younger their fingertips, the less dexterous they have and the lower their visual acuity, and the like. Stripping the protective layer from the layer had the problem of imposing a heavy burden. In addition, since both the protective layer and the heat generating member are flexible, the heat generating member is twisted and the pressure-sensitive adhesive layers are entangled with each other, so that it takes time to return to the original state.

The present invention solves the above-mentioned conventional problems, and enables the elderly to easily and easily peel off the protective layer adhered to the pressure-sensitive adhesive layer without any trouble. It is an object of the present invention to provide a low-cost, mass-productive, heat-resistant patch which has a simple structure in which the pressure-sensitive adhesive layers do not become entangled in use and has excellent skin adhesion, pharmacological effects and pharmacological persistence.

[0005]

Means for Solving the Problems In order to achieve this object, the hot patch of the present invention has the following constitution.
The heating patch according to claim 1, wherein the heat-generating member, the pressure-sensitive adhesive layer spread on one side of the heat-generating member in a substantially whole or partial or frame-like manner with or without a support. A protective layer adhered to the entire surface of the pressure-sensitive adhesive layer, and a thickened reinforcing portion formed on at least one side of the protective layer, or at least one or a plurality of corners on one or more sides of the protective layer. When,
Is provided. According to a second aspect of the present invention, there is provided the thermal patch according to the first aspect, wherein the reinforcing portion has a structure in which characters, figures, symbols, and the like are printed on its surface or the like and / or are colored. The hot patch according to claim 3,
In any one of claims 1 and 2, the reinforcing portion is formed by being adhered and laminated on the protective layer separately from the protective layer. The thermal patch according to claim 4, wherein the protective layer and / or the reinforcing portion is a film of a synthetic resin such as polypropylene, polyethylene, polyester, polyvinyl chloride, and polystyrene according to any one of claims 1 to 3. Or, it has a configuration selected from a sheet, silicon-processed paper, aluminum foil, or the like. The hot patch according to claim 5 is the same as claim 1.
4 to 4, wherein the protective layer and / or the reinforcing portion has a thickness of 0.1 to 1000 μm.

Here, the type of the heat-generating member is not limited, and any known heat-generating member can be used. For example, a heating member using electricity, a heating member using a dry cell or a solar cell or a paper-shaped battery, or a heating bag in which a heating agent causing chemical heating is accommodated in a flat bag body may be used. Above all, a heating body is preferably used as a heating member from the viewpoint of portability, warm compressing effect and the like. The composition of the exothermic agent is composed of an iron powder system, a reaction aid, water and a water retention agent, and a substance that generates heat in the presence of air and water is preferably used. Specifically, iron powder, reduced iron powder, activated carbon, alumina, silica gel, charcoal, water-absorbing polymer, sodium chloride, potassium chloride, magnesium chloride, iron chloride, acetic acid, chloroacetic acid,
It is a composition in which exothermic raw materials such as water and an acrylic water-absorbing polymer are appropriately compounded and formulated. The amount of the exothermic agent is suitably 0.5 to ⁶ g / cm ² , preferably about 1 to 3 g / cm ² . Although it depends on the type of exothermic agent, as the exothermic agent is less than 1 g, there is a tendency that the heating effect cannot be obtained, and as the amount of exothermic agent exceeds 3 g, there is a tendency that there is a risk of low-temperature burn. Further, as the temperature condition of the exothermic agent, it is most important that the thermal stability of the pressure-sensitive adhesive layer is not destroyed. As the temperature setting, the surface temperature of the pressure-sensitive adhesive layer is preferably 60 ° C. or less, more preferably 50 ° C. or less, and furthermore The best condition is 45 ° C or less,
Particularly around 40 ° C. is preferable. This is to prevent low-temperature burns and enhance the heat treatment effect. A ceramic powder may be contained in the composition of the heating agent, or a ceramic layer may be provided between the heating member layer and the pressure-sensitive adhesive layer. The far-infrared effect can provide a thermal effect to deep inside the body. The flat bag may be formed of two or more synthetic resin layers depending on the purpose. However, in selecting the material, it is preferable to select a material that has heat sealing properties and can be easily heat-sealed. . In this case, when two or more synthetic resin layers cannot be heat-sealed, these synthetic resin layers may be joined with a hot-melt adhesive film interposed therebetween. Care must be taken not to lose the moisture permeability of the breathable film. Examples of the polymer material forming the flat bag include polyethylene, polypropylene, nylon, polyester, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, saponified ethylene-vinyl acetate copolymer, and ethylene-vinyl acetate copolymer. Coalesce, natural rubber, recycled rubber, synthetic rubber and the like. It is preferable to use a breathable reinforcing film made of woven or nonwoven fabric to reinforce the flat bag, such a breathable reinforcing film, for example,
Formed using one or more materials selected from synthetic fibers such as nylon, vinylon, polyester, rayon, acetate, acrylic, polyethylene, polypropylene, polyvinyl chloride and the like, and natural fibers such as cotton, hemp and silk. .

The pressure-sensitive adhesive layer can be used as a mere adhesive to clothing such as a shirt or the like, depending on various kinds of compounding or prescription.
It is a layer for warming the skin as a poultice by mixing a paste for poultice and a drug. The pressure-sensitive adhesive layer is spread over substantially the entire surface of the support or, when the heating member is a heating body, over the entire surface, or is formed in a dotted shape, a plurality of strips, a wavy shape, or a frame shape. Is done. As the substrate, those having an acrylic copolymer, an ABA type block copolymer, an alicyclic petroleum resin, and a softener are preferably used. By adding a drug to this base material, it can be particularly effectively used as a hot compress for external use. AB-type block copolymer or other polybutene rubber
Butyl rubber and silicone rubber are used. Further, tackifiers such as terpene-based resins and petroleum-based resins, liquid and paraffin, animal and vegetable oils such as olive oil, soybean oil, beef tallow, tongue fat, and adhesive / holding power modifiers such as polybutene, lower isoprene, and wax; Fillers such as titanium, zinc oxide, aluminum metasilicate, calcium sulfate, and calcium phosphate may be added. The pressure-sensitive adhesive layer thus obtained contains water so that heat conduction to the skin is improved,
And it is desirable to have excellent adhesiveness. Further, it is desirable that the adhesive layer has an appropriate cohesive property such that the adhesive layer is softened even at a temperature of 38 to 44 ° C. at the time of heat generation and the plaster of the adhesive layer does not remain on the skin. For example, as a content raw material for containing water, CM
C, sodium polyacrylate, kaolin, gelatin,
Various cross-linking agents such as titanium oxide can be used. In addition, various raw materials can be used to obtain desired physical properties such as flexibility and tackiness. In addition, by adding a water-absorbing polymer, sweat that has been sweated can be absorbed, the adhesion to the skin can be maintained, and the feeling of use can be improved. In addition, the transferability can be prevented by adding a non-transferable pressure-sensitive adhesive, so that the convenience can be improved and the application site can be enlarged.
As the ABA type block copolymer and the AB type block copolymer, a block copolymer of a monovinyl-substituted aromatic compound A and a conjugated diolefin copolymer B is suitably used. Specific examples thereof include Califlex TR-1101, Califlex TR-1107, and Califlex TR-1111 manufactured by Shell Chemical Company, and Solprene 418 and Sorprene 311 manufactured by Philippe Petroleum. It is 10 to 40 parts by weight, preferably 15 to 30 parts by weight. By adding 15 to 30 parts by weight of the AB type block copolymer, AB-
It is possible to improve the compatibility, anchoring power, and adhesive strength of the active ingredient of the A-type block copolymer, and to improve the cohesive strength due to the oily component. As the amount falls outside this range, these effects tend to be reduced. It is not preferable.

[0008] As the water, water, hot water, sodium chloride water, glycerin, peppermint oil, methyl salicylate, glycol salicylate and the like, which are used alone or in combination, may be used alone or in combination with liquid alcohols and liquid fatty acids. Esters and the like are also used, but in these liquids, in addition to conventional ones such as menthol, camphor, and non-steroidal agents, various liquids are dissolved, and further, a surfactant or the like as a dispersion stabilizer is used. .

The alicyclic petroleum resin is a petroleum resin having a cyclic skeleton, specifically, Alcon P-85,
Alcon P-100, Alcon P-125 (Arakawa Chemical), Quinton (Zeon Corporation), Escolets 30
00 (manufactured by Exxon), etc., and its compounding amount is 10 to 50.
Parts by weight, preferably 25 to 45 parts by weight. This is for adjusting the flexibility of the base material.

As the softener, higher fatty acids, liquefied rubber,
Mineral oil or the like is used, and its blending amount is 10 to 50 parts by weight, preferably 25 to 45 parts by weight. 2 softeners
By adding 5 to 45 parts by weight, depending on the heat generation temperature of the heat generating agent, it is possible to prevent softening, sagging and flow of the base and to adjust flexibility. As the value deviates from this range, there is a tendency that these effects cannot be obtained. The water-absorbing polymer is one that absorbs water 10 times or more its own weight and gels and swells. For example, a water-absorbing polymer in which a lightly crosslinked bond is introduced into a water-soluble polymer may be used alone or in combination of two or more. Formulated with a mixture. Specifically, Sunwet IM-300, Sunwet IM-
300MPS, Sunwet IM-1000, Sunwet IM-1000MPS (manufactured by Sanyo Chemical), Aquakeep 4S, Aquakeep 4SH (manufactured by Iron & Steel Chemicals), Sumikagel SP-520, Sumikagel N-1040 (manufactured by Sumitomo Chemical), etc. KI gel 201-K, KI gel-201K-
F2 (Kuraray), etc., Arasorp 800, Arasorp 8
00F (manufactured by Arakawa Chemical), etc.
M-300MPS, Sun wet IM-1000MP
S, Sumikagel NP-1020, Sumikagel NP-10
40, KI gel-201K-F2, Arasorp 800F
Etc. are particularly preferred. The mixing amount is 1 in the pressure-sensitive adhesive composition.
10 to 10 parts by weight, preferably 2 to 8 parts by weight.
If the amount of the water-absorbing polymer is less than 2 parts by weight, the absorption of sweat tends to be insufficient, and if it exceeds 8 parts by weight, the skin is dried, which is not preferable. In addition, conventionally known antioxidants, inorganic fillers such as talc and tanker, antioxidants, and the like are appropriately compounded according to the purpose of use.

[0011] The drug contains a transdermally absorbable drug, and can be used as a patch for hot medical treatment. For example, skin irritants and analgesic anti-inflammatory agents include salicylic acid, methyl salicylate, glycol salicylate, l-menthol, camphor, peppermint oil, thymol, benzyl nicotinate, capsicum extract, capsaicin,
Nonanilic acid wanialamide, flupinac, flufenamic acid butyl, piroxicam, indomethacin, ketoprofen, pranoprofen, feprazone, loxoprofen, ampfenac sodium, oxaprozin, emorfazone, fentiazac, diclofenac sodium, diflunisal, ibuprofenpiconol, prondaxen and sudazafen , Felbinac, tenidap, ketorolac, and their ester derivatives, or pubrenorphine hydrochloride, pentazocine, putorphanol tartrate and the like are used. As central nervous system drugs (sleep sedatives, antiepileptics, psychiatric agents), fluphenazine, thioridazine, diazepam, chlorpromazine, nitrazepam, estazolam, triazolam, nimetazepam, flunitrazepam, halosexazolam, flurazepam, clonazepam, propericidin Prochlorperazine, alprazolam, oxazepam, oxazolam, cloxazolam, prazepam, flutazolam, mexazolam, lorazepam, fludiazepam, promazepam, metazepam, nicotine and the like are used. Examples of diuretics include hydrothiazide, pendroflunathiazide, ethiazide, cyclopenthiazide, hydrochlorothiazide, penflutide, meticlothiazide, furosemide, metrazone, polythiazide, bendroflumethiazide, and the like. Clonidine,
Arthuroxylone, resinamine, dihydroergotoxin mesylate, reserpine, prazosin, captopril, pindolol, enalapril maleate and the like are used. Examples of coronary vasodilators include nitroglycerin, nitroglycol, dipyridamole, efloxate, trimetazine, nicorandil, cinnarizine, nylidone,
For example, molsidominiphedipine is used. Antitussive expectorants (including bronchodilators and antiallergic agents) include codine phosphate, dihydrocodine phosphate, ephedrine hydrochloride, chlorprenaline hydrochloride, fenoterol hydrobromide, salptamol sulfate, dimemorphan phosphate, azelastine hydrochloride Clenpterol hydrochloride, tulopterol hydrochloride, trimethoquinol hydrochloride, procaterol hydrochloride, promhexine hydrochloride, tranilast, tibepidine hibenzate, ketotifen fumarate, formoterol fumarate, bensproperin phosphate, glycyrrhetinic acid, and the like. Examples of the antihistamine include diphenhydramine hydrochloride, triprolidine hydrochloride, isothibenzyl hydrochloride, promethazine hydrochloride, chlorpheniramine maleate, cyproheptadine hydrochloride, clemastine fumarate, carbinoxamine maleate, dimethindene maleate and the like. As the agent for arrhythmia, alprenolol, oxprenolol, pucmorol, bupranolol, pindolol, indenolol, carteolol, bufetrol, propranolol, timolol and the like are used.
As a cardiotonic agent, dikitalis, ubidecarenone, digoxin, methyldigoxin, destranoside and the like are used. As the sex hormone, estradiol enanthate, estradiol cipinate, levonorgestrel, estradiol and the like are used. Adrenal cutaneous hormones include hydrocortisone acetate, hydrocortisone, prednisolone, triamcinolone acetonide, dexamethasone phosphate, methylprednisolone,
Dichlorin acetonide acetate, dexamethasone acetate, dexamethasone, fluorometholone, betamethasone sodium phosphate, betamethasone, betamethasone valerate, beclomethasone propionate, fludoxycortide, hydrocortisone acetate, betamethasone dipropionate, fluoxynonide, clobetasol propionate, valerate Diflucortron, halcinonide, amcinonide, prednisolone valerate and the like are used. As a local anesthetic,
Lidocaine, ethyl aminobenzoate, procaine hydrochloride,
Zipcaine, procaine and the like are used. These medicinal ingredients are used alone or in combination of two or more as necessary. The compounding amount is preferably an amount in which a medicinal effect can be expected.
It is appropriately formulated within the range of 20 to 20 parts by weight. Naturally, extracts and powders of Chinese herbs which can be used as warm cloth medicines can also be used.

As a non-transferable pressure-sensitive adhesive, a pressure-sensitive adhesive of an organic solvent type such as a rubber type, an acrylic type or a vinyl acetate type, or an aqueous type is used. For example, a mixture of an acrylic monomer and a functional monomer in an amount of 1 to 10% by weight is used. As the functional monomer, a monomer obtained by adding 1 to 4% by weight of the following general formula I is preferable.

Embedded image (Wherein, R ₁ represents a lower alkyl group having 1 to 4 carbon atoms, and R ₂ represents a hydrogen atom or a methylol group) or 6 to 10% by weight of the following general formula II With acid catalyst,

Embedded image (Wherein R ₁ represents a hydrogen atom or a methyl group, R ₂ represents a hydrogen atom or an alkyl group or an allyl group having 1 to 6 carbon atoms, and R ₃ represents an alkyl group having 1 to 18 carbon atoms). Are non-adhesive pressure-sensitive adhesives to which 1 to 8% by weight of a functional monomer represented by the following general formula III is added and 1 to 5% by weight of a water-soluble or dispersible epoxy compound is externally added. All are known.

Embedded image (Wherein, R ₁ represents a hydrogen atom or a methyl group.
R ₂ and R ₃ represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. )

The water retention agent is not particularly limited as long as it has high water retention and eliminates stickiness in the heating element composition, and specific examples thereof include vermiculite, silica powder, wood powder, and the like. At least one of water-absorbing polymers and the like is included.

As the protective layer and the reinforcing portion, a colorless or colored material such as a synthetic resin film or sheet such as polypropylene, polyethylene, polyester, polyvinyl chloride, polyvinylidene chloride, and polystyrene, siliconized paper, and aluminum foil is used. It is desirable that the protective layer and the reinforcing portion be colored in a different color or that a character, a symbol, a code, or the like be printed on one surface thereof. This is to make it easy to identify the peeling position. The reinforcing portion is formed on at least one side of the protective layer or on one or a plurality of corners of any side of the protective layer. When the shape of the protective layer is large, or when the protective layer is made of a synthetic resin having a small thickness and low rigidity, the protective layer may be formed on both sides. When the reinforcing portion is formed on the entire surface of one side of the protective layer, it is formed with a width of 2% to 50%, preferably 4% to 40%, more preferably 6% to 30% of the area of the protective layer. Preferably. Specifically, the size of the reinforcing portion is 0.3 to 5 cm, preferably 0.5 to 4 cm, and more preferably 1 to 3 cm. Depending on the material of the reinforcing part, there is a tendency that the strength of the protective layer's waist becomes weaker when it is less than 1 cm, and when it exceeds 3 cm, the reinforcing part of the protective layer is too wide and the hot patch is applied to the affected part. While the protective layer is peeled off while peeling, a tendency to be difficult to peel off is recognized, which is not preferable. In addition, the shape of the reinforcing portion is not limited to a band shape, but may be a round shape, an ellipse, a square shape such as a square, a triangle, a star shape, a heart shape, a character such as a doll, or various other shapes as long as it is easy to turn over the protective layer. It may be formed in the aforementioned size. This is because the peeling of the protective layer can be performed smoothly, and the display of the peeling position can be printed on the surface of the reinforcing portion, so that the convenience can be improved. The thickness of the protective layer or the reinforcing portion is 0.1 to 1000 μm, preferably 1 to 500 μm.
m, more preferably in the range of 5 to 100 μm. It is easy to turn up the support simply by rubbing the end of the reinforcing part of the thermal adhesive with the fingertip by strengthening the protective layer, and the conventional production line can be used as it is, so it can be peeled off and manufactured. It is preferable from the viewpoint of the process. When the reinforcing portion is formed of a reinforcing portion bonded and laminated on the protective layer, the reinforcing portion may be formed of the same or different material as the protective layer and adhered with an adhesive. The use of the above material is preferable because it can be easily bonded and laminated by thermal bonding. When the protective layer is thin and stiff, the reinforcing portion is preferably formed to be thicker than the protective layer or to be formed of a synthetic resin stiffer than the protective layer. When the protective layer is formed of a stiff synthetic resin, the protective layer may have the same thickness or a smaller thickness.
This is because the work of peeling the protective layer can be facilitated.

[0015]

According to this structure, since a flexible and stiff reinforcing portion is formed at the end of the protective layer, the protective layer can be rubbed with the fingertip only at the end of the hot patch at the portion reinforced by the reinforcing portion. And the support can be easily turned. In addition, since the end of the protective layer reinforced by the reinforcing portion can be easily separated from the pressure-sensitive adhesive layer only by touching a fingertip thereof,
The protective layer can be peeled off from the adhesive layer very easily only by pinching a part of the hot patch and further pinching and opening the reinforced end of the protective layer. In addition, the reinforcing portion formed in a strip shape on the side of the protective layer can prevent the protective layer from sagging, so that the adhesive layer with good adherence to the protective layer can be prevented and the adhesive layers are entangled with each other. It can be peeled off without wrinkling. The existing production line can be used by forming the reinforcing portion by bonding and laminating the reinforcing portion separately from the protective layer. The hot patch obtained in this manner is used for diseases such as stiff shoulders, back pain, bruising, sprains, etc., and can be expected to have a sufficient therapeutic effect by heat. Is significantly suppressed by imparting sweat absorbency to the hot patch of the present invention. Since a pressure-sensitive adhesive layer containing a medicinal component is provided, the heat-sensitive patch sufficiently absorbs sweat, which is considered to be a cause of touch even when applied for a long period of time, and thus significantly suppresses the generation thereof. It also has a warming effect, further enhances percutaneous absorption of the drug to the human body skin, has a rapid onset of drug effect, and is preferable in terms of therapeutic effect. A heat-generating heating type of a chemical heating type in which a heating agent is contained in a flat bag is excellent in portability. By providing a poultice layer on the other side of the heat generating member made of a flat bag enclosing the heat generating composition, that is, on the side opposite to the air permeable film side (background), it can be used as a hot compress.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view of a hot patch of the first embodiment of the present invention. 1 is a heating patch of the first embodiment, 2 is a heating member composed of a flat bag body containing a chemical heating agent, 3 is a support adhered or integrally laminated on the entire surface of one surface of the heating member 2, and 4 is Styrene-isoprene-styrene block copolymer, Alcon P-85 (alicyclic petroleum resin), mineral oil liquid paraffin as a softening agent, acrylic as a water-absorbing polymer A pressure-sensitive adhesive layer containing a water-absorbent resin, 5 is a protective layer attached to the entire surface of the adhesive layer 4, 6 is a reinforcing portion attached to the entire surface of one side of the adhesive layer 4, and 7 is a reinforcing portion. Reference numeral 8 denotes an end portion of the protective layer 5 on the surface of which the peeling position and the like are clearly displayed by printing. The pressure-sensitive adhesive layer 4 was prepared according to the following formulation. 100 parts of styrene-isoprene-styrene tereblock copolymer, 10 parts of styrene-isoprene copolymer, liquid paraffin 150
Parts and 50 parts of a rosin-modified maleic resin are heated and dissolved at 140 to 150 ° C. in a nitrogen gas stream. After cooling the melt (about 150 ° C.) to about 120 ° C., 30 parts of methyl salicylate and 21 parts of 1-menthol were added and mixed to obtain a uniform product. This was spread on a support to a thickness of about 1 mm using a spreading machine.

The method of using the hot patch of the present embodiment thus constituted will be described below. Since the end 8 of the protective layer 5 is laminated by the reinforcing portion 6a, the user has a strong reinforcement at the end 8 of the protective layer 5. Therefore, when the end 8 of the protective layer 5 is rubbed with a fingertip, the end 8 of the protective layer 5 can be turned with its elasticity. Then, when the edge of the rolled-up protective layer 5 or the support 3 is pinched with a finger, the protective layer 5 and the pressure-sensitive adhesive layer 4 are slightly peeled off. Next, the exposed pressure-sensitive adhesive layer 4 is applied to the affected area, and the protective layer 5 is peeled off and the hand is applied to adhere to the affected area. As described above, according to the present embodiment, since the side portions of the protective layer are reinforced by the reinforcing portions and the waist is reinforced, the protective layer and the adhesive layer can be easily peeled off only by rubbing with a fingertip, In addition, the protective layer is peeled off by simply touching the heat generating member while applying the exposed adhesive layer to the affected area by slightly peeling it off, so that the affected area can be cleanly cleaned without fouling the hands and without wrinkling the hot patch. Can be stuck on. In this embodiment, the description has been given of the thermal adhesive patch in which the reinforcing portion is bonded and laminated on one side of the protective layer. However, the reinforcing portion may be formed by bonding and laminating on both sides of the protective layer. When the protective layer is made of a thin synthetic resin film, the pressure-sensitive adhesive layer can be smoothly adhered to the affected area while preventing twisting and wrinkling of the hot patch. In addition, the same effect can be obtained by extruding the reinforcing portion integrally with the protective layer instead of bonding and laminating the reinforcing portion, and the number of production steps can be reduced as compared with the production method using the reinforcing portion. Can increase the quality.

Embodiment 2 FIG. 2 is a perspective view of a hot patch of a second embodiment of the present invention. 2 is a heat generating member, 3 is a support, 4 is an adhesive layer, 5 is a protective layer, 7 is a display portion, 8 is an end of the protective layer 5, and these are the same as those of the hot patch of the first embodiment. Therefore, the same reference numerals are given and the description is omitted. The pressure-sensitive adhesive layer used was prepared in the same manner as in Example 1.
Reference numeral 1b denotes a hot patch of the second embodiment, and reference numeral 6b denotes a square reinforcing portion adhered and laminated as a reinforcing portion on one side corner of the protective layer 5. Note that the reinforcing portion 6b can strengthen the stiffness of the peeled portion of the protective layer 5 by forming a right-angled triangle or a round shape in which both sides are combined with both sides of the corner instead of a square.

(Experimental Example) Next, using the thermal patches of Examples 1 and 2, confirmation tests of the peeling time, skin adhesion, and duration of the pharmacological effect were conducted on 10 female panelists in their 50s and 70s. went. The results are shown in (Table 1).

[Table 1] In the table, the peeling time is the time required for transferring five sheets of the hot patch of this example to each panelist and stripping the protective layer of the hot patch. The skin adhesion was evaluated as good, normal, or not by judging the presence or absence of spontaneous exfoliation, the pain at the time of exfoliation, and adhesive residue. still,
As a comparative example, a peeling test was performed under the same conditions as in Examples 1 and 2 using a commercially available hot patch. As is clear from Table 1, the peeling time of Examples 1 and 2 is very short, which is 1/4 to 1/7 of that of Comparative Example, so that even an elderly person can peel off very easily. In addition, the pharmacological effect duration was more than 1.5 times as good as that of the comparative example and the skin adhesion was also excellent compared with the comparative example, and the adhesive layer was widely applied to the adhesive layer from the comparison of Examples 1 and 2. It was found that the formation of the reinforcing portion facilitated peeling.

(Embodiment 3) FIG. 3 is a perspective view of a hot patch according to a third embodiment of the present invention. 2 is a heat generating member, 3 is a support, 4 is an adhesive layer, 5 is a protective layer, 8 is an end of the protective layer 5, and these are the same as those of the hot patch of the first embodiment. And the description is omitted. Reference numeral 1c denotes a hot patch of the third embodiment, and 6c denotes a right-angled triangular reinforcing portion partially adhered and laminated as a reinforcing portion on both ends of the protective layer 5. Since both sides of the protective layer 5 are reinforced, the protective layer 5 can be peeled off from either side. Note that the reinforcing portions 6c may be formed at all corners of the protective layer 5. Peeling can be performed from either side, and convenience can be improved.

(Embodiment 4) FIG. 4 is a perspective view of a hot patch according to a fourth embodiment of the present invention. 2 is a heat generating member, 3 is a support, 4 is an adhesive layer, 5 is a protective layer, 7 is a display portion, 8 is an end of the protective layer 5, and these are the same as those of the hot patch of the first embodiment. Therefore, the same reference numerals are given and the description is omitted. 1
d is the hot patch of the fourth embodiment, and 6d is a reinforcing part partially adhered and laminated as a reinforcing part at the center of one side of the protective layer 5. Since the reinforcing portion 6d in which the display layer 7 is formed is provided at the center, the peeling position can be easily visually recognized and peeled.

[0022]

As described above, according to the present invention, a protective layer is adhered to the entire surface of the pressure-sensitive adhesive layer, a reinforcing portion is formed on one side or a corner of the protective layer, and the reinforcing portion is colored. , Or a character or the like is printed, so that even a user, especially an elderly person, can very easily confirm the peeled portion and its position, and the end portion of the protective layer reinforced by the reinforcing portion of the portion. By rubbing with a fingertip, the end part of the protective layer and a part of the hot patch can be easily flipped.Pick the part, separate both parts securely in a short time, and then immediately apply it to the affected part. Can be. In addition, letters on the reinforcement,
Since the symbols, symbols, etc. are printed, the peeling position can be easily confirmed, and the peeling work is not bothersome.
In addition, it is possible to apply a hot patch to the affected area without soiling the hands, and it is extremely convenient and can realize a low-cost, hot patch suitable for mass production with excellent skin adhesion and long-lasting efficacy. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hot patch of one embodiment of the present invention.

FIG. 2 is a perspective view of a hot patch of the second embodiment of the present invention.

FIG. 3 is a perspective view of a hot patch of a third embodiment of the present invention.

FIG. 4 is a perspective view of a hot patch according to a fourth embodiment of the present invention.

5A is a perspective view of a conventional hot patch, and FIG. 5B is a cross-sectional view taken along line AA in FIG.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d Thermal adhesive 2 Heating member 3 Support 4 Adhesive layer 5 Protective layer 6, 6a, 6b, 6c, 6d Reinforcing part 7 Display part 8 End of protective layer 10 Conventional thermal adhesive Agent 11 Heating member 11a Chemical heating agent 11b Flat bag 11c Air-permeable base film 11d Reinforcement film 12 Adhesive layer 13 Adhesive layer 13a Support 13b Adhesive 14 Protective layer

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsumasa Kabashima 408 Address, Tashiro-Daikomachi, Tosu City, Saga Prefecture Hisamitsu Pharmaceutical Co., Ltd. (56) References Japanese Utility Model SHO 59-169830 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61F 7/02 A61F 7/08 334

Claims (5)

(57) [Claims] 1. A heat-generating member, a pressure-sensitive adhesive layer which is spread on one surface of the heat-generating member with or without a support, substantially entirely or partially or in a frame shape, and the entire surface of the pressure-sensitive adhesive layer. A protective layer attached to the protective layer, and a reinforcing portion formed in a thick-walled shape on one or more corners on the entire surface of at least one side of the protective layer, partially or on any side thereof. A hot patch, characterized in that: 2. The method according to claim 1, wherein the reinforcing portion includes a character, a graphic,
The hot patch according to claim 1, wherein a symbol or the like is printed and / or colored. 3. The hot patch as claimed in claim 1, wherein the reinforcing portion is formed by bonding and laminating on the protective layer separately from the protective layer. 4. The protective layer and / or the reinforcing portion is selected from a film or sheet of a synthetic resin such as polypropylene, polyethylene, polyester, polyvinyl chloride, polystyrene, or the like, or silicon-processed paper, aluminum foil, or the like. The hot patch according to any one of claims 1 to 3, characterized in that: 5. The hot patch according to claim 1, wherein the thickness of the protective layer and / or the reinforcing portion is 0.1 to 1000 μm.