WO2007026504A1 - Stretchable cooling sheet - Google Patents

Abstract

A stretchable cooling sheet (11) provided with a hydrous gel layer (13) comprising a water-soluble polymer and a large amount of water contained in the polymer, which comprises the hydrous gel layer (13), the first sheet (14) which is made of a stretchable fiber and placed on the underside of the gel layer (13) in such a way as to cover the whole of the underside, a pressure-sensitive adhesive layer (17) containing powdered aluminum and a release paper (19) which are placed on the underside of the first sheet (14) successively in such a way as to cover the whole of the underside, and the second sheet (16) which is at least unidirectionally stretchable and is placed on the face of the hydrous gel layer (13) in such a way as to cover the whole of the face. In using, the release paper (19) is peeled off and the resulting sheet is applied directly to an affected part with the pressure-sensitive adhesive layer (17) faced to the affected part, whereby the cooling sheet (11) can adhere stably to an affected part and the water contained in the hydrous gel layer (13) can evaporate through the first and second sheets (14, 16) to make a cooling effect on the affected part.

Description

 Textbook Cooling and expanding body Technical field

 The present invention relates to a cooling expansion / contraction body, and more particularly to a cooling expansion / contraction body that can be applied directly to the skin for easy icing as a body care method after sports. Background art

 A scented gel sheet in which a moisture-containing gel material is applied to a cloth has been proposed as a technique for absorbing heat by directly contacting the skin (see Japanese Laid-Open Patent Publication No. 1 1 1 2 4 6 3 9 7) . In addition, a cooling body-worn device using an endothermic action and a compression action has been proposed (see Japanese Patent No. 2 0 0 1-8 0 80 0). In addition, when heat is generated, a cooling pack in which a coolant is processed into a bag shape has been proposed and used after exercise and in general households (Japanese Patent No. 3 5 7 4 4 9 6 (See the publication).

 When the gel layer as described above is applied to the skin in order to care for pain and muscles of joints caused by pain, inflammation, heat, etc. due to trauma, bruise, fatigue, etc. received during exercise Is assumed. In this case, since the adhesive strength of the gel layer itself is weak, the gel layer peels off easily when moved and cannot be said to be convenient. Also, if you exercise immediately after cooling, you need to remove the patch itself.

Neither the cooling bag containing the liquid nor the cooling pack made of a coolant in the shape of a bag and the rubber icing pack that uses ice for the shoulders and elbows have no adhesive layer. Therefore, it is necessary to press the bag with your hand or fix it with rubber band or hook-and-loop fastener. In this case, the contents are ice or cold Because it is made of wood, the affected area may be overcooled, resulting in frostbite and an accident.

 In addition, if a patch or a cooling pack is directly applied to or attached to the skin surface, there is a problem that the affected body suddenly cools and the body shrinks for a moment. Furthermore, after cooling, it is necessary to tap to protect the affected area, but it is necessary to prepare for taping separately.

 The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a cooling expansion / contraction body that facilitates icing of an affected area and that does not easily peel off even if moved during icing. And Disclosure of the invention

 In order to achieve the above object, the cooling and stretching body according to the first aspect of the present invention is a cooling and stretching body that is used by being attached to a site to be pasted such as the skin, and is endothermic by the evaporation of the water it holds. An endothermic layer, a first sheet body that is stretchable and formed on the entire surface of one side of the endothermic layer, and an adhesive layer that is formed on the outer surface of the first sheet body.

 If comprised in this way, the whole cooling expansion-contraction body which has an endothermic layer will become elastic.

 In the cooling stretchable body according to the second aspect of the present invention, in the configuration of the invention according to the first aspect, the endothermic layer is a hydrous gel layer.

 With this configuration, a large amount of moisture can be retained. The cooling stretchable body according to the third aspect of the present invention is the invention according to the second aspect, wherein the first sheet body is made of a nonwoven fabric in which the fibers themselves are stretchable.

If comprised in this way, expansion and contraction of a cooling expansion-contraction body will be attained in any direction. The cooling stretchable body according to the fourth aspect of the present invention is the one according to the second aspect or the third aspect of the invention, further comprising a second sheet formed on the entire other surface of the endothermic layer. It is.

 With this configuration, the other surface of the hydrogel layer is covered with the second sheet body.

 In the cooling stretchable body according to the fifth aspect of the present invention, in the configuration of the invention according to the fourth aspect, the second sheet body is made of a nonwoven fabric.

 With this configuration, the air permeability of the second sheet body is ensured.

 A cooling stretchable body according to a sixth aspect of the present invention is the structure of the invention according to any one of the first to fifth aspects, wherein the adhesive layer contains a metal powder.

 If comprised in this way, the heat conductivity of the adhesion layer will become high.

 In the cooling stretchable body according to the seventh aspect of the present invention, in the configuration of the invention according to the fifth aspect, the bonding force between the first sheet body and the endothermic layer is smaller than the bonding force between the second sheet body and the endothermic layer. It is a thing.

 With this configuration, when a force is applied in the direction in which the second sheet body is peeled off, the second sheet body is separated from the first sheet body together with the endothermic layer.

 As described above, the cooling expansion / contraction body according to the first aspect of the present invention allows the entire cooling expansion / contraction body having the endothermic layer to expand and contract, so that the endothermic layer is held in close contact regardless of the shape of the part to be adhered. It becomes possible to do. In addition, if the first sheet is used as a taping material, the fixing effect by taping and the cooling effect of the endothermic layer are synergistically exhibited, and it becomes possible to reduce the inflammation of the adherend and effectively treat it. . Furthermore, if the endothermic layer is removed, the taping effect of the first sheet body will be maintained as it is, making it easy to use.

The cooling stretchable body according to the second aspect of the present invention can retain a large amount of water in addition to the effect of the invention according to the first aspect. It takes a long time to convert, and the duration of the endothermic effect becomes longer.

 In addition to the effect of the invention according to the second aspect, the cooling stretchable body according to the third aspect of the present invention allows the cooling stretchable body to expand and contract in either direction. However, it is easy to apply and improves usability. In addition, since the nonwoven fabric itself has air permeability, vaporization of the heat absorption layer is promoted and cooling efficiency is improved.

 In the cooling stretchable body according to the fourth aspect of the present invention, in addition to the effects of the invention of the second aspect or the third aspect, the other surface of the water-containing gel layer is covered by the second sheet body. The gel layer is not in direct contact with clothing, etc., improving usability.

 The cooling stretchable body according to the fifth aspect of the present invention, in addition to the effect of the invention according to the fourth aspect, ensures the air permeability of the second sheet body, and therefore does not hinder the vaporization of the hydrogel layer, It becomes possible to maintain the cooling effect ο

 In addition to the effects of the invention according to any one of the first to fifth aspects, the cooling stretchable body according to the sixth aspect of the present invention increases the thermal conductivity of the adhesive layer. The effect is increased and the therapeutic effect is improved.

 In addition to the effects of the invention according to the fifth aspect, the cooling stretchable body according to the seventh aspect of the present invention separates from the first sheet body together with the endothermic layer when a force is applied in the direction of peeling the second sheet body. It is easy to remove the endothermic layer that is no longer needed, making it easy to use. Brief Description of Drawings

 FIG. 1 is a perspective view showing a schematic shape of a cooling stretchable body according to the first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing the manufacturing process of the cooling stretchable body shown in FIG. The best mode for carrying out the invention

 FIG. 1 is a perspective view showing a schematic shape of a cooling stretchable body according to the first embodiment of the present invention.

Referring to the figure, the cooling expansion / contraction body 11 is configured around a sheet-like hydrogel layer 13. Specifically, the water-containing gel layer 13 is composed of, for example, a water-soluble polymer 10 to 40% by weight, a moisture content 50 to 80% by weight formed thereby, and an additive 10% by weight. It is comprised by the gel structure which consists of. An elastic nonwoven fabric having a basis weight of 30 to 100 g / m ² is formed as a first sheet body 14 on the entire lower surface of the hydrogel layer 13. Specifically, the first sheet body 14 is made of a material in which the fibers themselves such as polyester elastomer and urethane are stretchable. Accordingly, the first sheet body 14 is configured to be stretchable in all directions within the plane. The lower surface of the first sheet member 1 4 adhesive layer 1 7 is formed at a coverage over the entire surface (before drying ^{Weight) 8 0~ 1 5 0 gZm 2} . The adhesive layer 17 is specifically composed of an acrylic adhesive containing 1 to 80% by weight of aluminum powder having an average particle size of 1 to 30 zm. Examples of metal powders other than aluminum powder include gold, platinum, silver, copper, and iron, but aluminum powder is preferred from the viewpoint of cost and heat conduction. Inclusion of the aluminum powder increases the thermal conductivity of the adhesive layer 17 and contributes to the improvement of the cooling effect by the heat of vaporization of the hydrogel layer 13. The release sheet 19 is formed on the entire lower surface of the adhesive layer 17, while the second sheet 16 is formed on the entire upper surface of the hydrated gel layer 13. Specifically, the second sheet body 16 is made of a stretchable nonwoven fabric having a basis weight of 20 to: L 0 0 g / m ² . This nonwoven fabric is made of rayon, for example. It is formed so that it can expand and contract in at least one direction in the plane. Then, by forming the second sheet body 16 over the entire upper surface of the hydrated gel layer 13, the function of protecting the surface of the hydrated gel layer 13 is exhibited. That is, when the cooling expansion / contraction body 11 is attached to the affected area, the first sheet body 14 is on the skin side, and the second sheet body 16 is on the clothing side. At this time, the second sheet 16 prevents the hydrated gel layer 13 from being destroyed by friction of clothes or the like. In addition, by forming the second sheet 16, it is possible to moderately suppress the vaporization of water held in the hydrated gel layer 13 and to maintain the cooling effect by the hydrated gel layer 13 for a long time. . Next, a method of using the cooling expansion / contraction body 11 will be described.

 Usually, the cooling stretchable body 11 is enclosed in a non-breathable bag or the like. This prevents vaporization of the water retained in the hydrogel layer 13. In use, the bag is broken, the cooling stretchable body 11 is taken out, and the release paper 19 is removed from the adhesive layer 17. In this state, the adhesive layer 17 is attached so as to be in direct contact with the affected part to be iced. The first sheet body 14 holding the adhesive layer 17 can be expanded and contracted in all directions within the plane as described above, so that the cooling expansion / contraction body 11 can be easily attached regardless of the site of the affected part. It can be pasted. At this time, if the adhesive layer 17 is stuck in an expanded state, the continuity is lost and the air permeability is also increased.

The heat of the affected area is transferred to the hydrogel layer 13 through the adhesive layer 17 and the first sheet body 14. At this time, since the adhesive layer 17 contains aluminum powder as described above, the heat conduction effect is improved as compared with the case where the adhesive layer 17 does not contain aluminum powder. Therefore, the body temperature of the affected area is efficiently transmitted to the hydrated gel layer 13 and promotes vaporization of the water retained in the hydrated gel layer 13. As a result, the affected part is cooled by the heat of vaporization of the hydrogel layer 13 and the icing effect is exhibited. At this time, the first sheet body 14 is breathable because of its structure. The warm air on the affected area reaches the hydrogel layer 13 and contributes to the vaporization of the hydrogel layer 13.

 The second sheet 16 formed on the upper surface of the hydrous gel layer 1 3 is configured to be stretchable in at least one direction in the plane as described above. Thus, it is possible to easily follow the change in elongation at the time of application to the affected area. In addition, since the second sheet 16 itself has air permeability, there is no possibility of inhibiting the vaporization of the water retained in the hydrogel layer 13.

 As described above, in the cooling expansion / contraction body 11 according to this embodiment, by simply peeling off the release paper 19 and attaching the adhesive layer 17 directly to the affected area, the affected area can be easily eased. Even if you move it, you don't have to worry about peeling off. As a result, an effective icing effect can be expected.

 Next, the state in which the water held in the hydrogel layer 13 is completely vaporized will be described. In this state, the cooling expansion / contraction body 11 no longer exhibits the cooling effect. Therefore, the hydrogel layer 13 is not necessary. Therefore, when the hydrogel layer 13 is peeled off together with the second sheet body 16, the first sheet body 14 attached through the adhesive layer 17 remains in the affected area. Since the first sheet body 14 has elasticity as described above, it exerts a taping effect on the affected part in that state. Normally, after the icing is completed, it is necessary to tap the affected area separately using a taping material. However, in the cooling expansion / contraction body 11 according to this embodiment, since only the water-containing gel layer 13 and the second sheet body 16 are removed, it is not necessary to perform a separate tape. It becomes.

In this embodiment, the hydrogel layer 13 and the second sheet body 16 can be easily removed from the first sheet body 14 in order to maintain the taping effect as it is after icing. . Ie, hydrous gel The first sheet body 14 and the second sheet body so that the bonding force between the layer 13 and the first sheet body 14 is smaller than the bonding force between the hydrogel layer 13 and the second sheet body 16. 1 6 configuration (weight per unit area and material) is set. Thus, when the second sheet body 16 is picked and force is applied to peel it off, the hydrogel layer 13 can be easily separated from the first sheet body 14 together with the second sheet body 16. It becomes.

 FIG. 2 is a schematic sectional view showing a manufacturing process of the cooling expansion / contraction body shown in FIG.

 As shown in (1), a release paper 19 made of a predetermined material and thickness is prepared, and an adhesive layer 17 is formed on the entire surface of one side as shown in (2). To do.

 Next, as shown in (3), the first sheet body 14 is installed on the outer surface of the adhesive layer 1 Ί. Further, a hydrogel layer 13 is formed on the entire outer surface of the first sheet body 14. The water-containing gel layer 13 is added with a tackifier for exerting an adhesive effect. A part of the hydrogel layer 13 enters from the surface of the first sheet body 14 and exhibits a predetermined bonding force. This penetration amount works in inverse proportion to the basis weight of the first sheet body 14. That is, if the basis weight of the first sheet body 14 is increased, the surface becomes dense and the amount of penetration of the water-containing gel layer 13 is reduced, so that the bonding force with the water-containing gel layer 13 is reduced.

Next, as shown in (5), the second sheet body 16 is placed on the entire outer surface of the hydrous gel layer 13. At this time, a part of the upper surface of the hydrogel layer 13 enters the lower surface of the second sheet 16 and exhibits a predetermined bonding force. This joining force also varies depending on the basis weight of the second sheet body 16. In this embodiment, as described above, the bonding force of the hydrogel layer 13 to the second sheet body 16 is such that the hydrogel layer 13 is bonded to the first sheet body 14. The first sheet body 14 and the second sheet body 16 are set so as to be larger than the joining force. Accordingly, when a force is applied to the second sheet body 16 in the peeling direction, the hydrated gel layer 13 is separated from the first sheet body 14 together with the second sheet body 16. In this way, it is possible to manufacture the cooling expansion / contraction body shown in FIG.

 In the above embodiment, the hydrogel layer is used as the endothermic layer. However, any other configuration may be used as long as it removes the heat of vaporization by vaporization of moisture.

 In the embodiment described above, a nonwoven fabric made of elastic fibers is used as the first sheet body. However, an elastic rubber sheet or the like may be used instead. In this case, vent

It is more preferable to provide air permeability by forming the like.

 Further, in the above-described embodiment, the adhesive layer is applied to the entire lower surface of the first sheet body. However, the adhesive layer may be applied in a lattice shape or an island shape in order to improve air permeability. .

 Furthermore, in the above embodiment, the second sheet body uses a non-woven fabric different from the non-woven fabric of the first sheet body, but the same non-woven fabric as the non-woven fabric of the first sheet may be used. Needless to say.

 Furthermore, in the above embodiment, the adhesive layer contains metal powder, but the metal powder is not necessarily required.

 Furthermore, in the above embodiment, the bonding force between the first sheet body and the hydrogel layer is set to be smaller than the bonding force between the second sheet body and the hydrogel layer, but these may be the same or The reverse is also possible. Industrial applicability

As described above, the cooling expansion / contraction body according to the present invention has a body case after sports. Suitable for sheeting directly on the skin for icing.

Claims

The scope of the claims 1. A cooling stretchable body that is used by being attached to a site to be applied, such as skin, and an endothermic layer (1 3) that absorbs heat by vaporization of the water it holds,  A first sheet body (14) formed on the entire surface of one end of the endothermic layer and having elasticity; and  A cooling expansion / contraction body comprising an adhesive layer (17) formed on an outer surface of the first sheet body.  2. The cooling stretchable body according to claim 1, wherein the endothermic layer comprises a hydrous gel layer. 3. The cooling elastic body according to claim 2, wherein the first sheet body is made of a nonwoven fabric in which the fiber itself has elasticity. 4. The cooling expansion / contraction body according to claim 2 or 3, further comprising a second sheet body (16) formed on the entire other surface of the endothermic layer.  5. The cooling stretchable body according to claim 4, wherein the second sheet body is made of a nonwoven fabric. 6. The cooling expansion / contraction body according to claim 1, wherein the adhesive layer includes a metal powder.  7. The cooling expansion / contraction body according to claim 5, wherein a bonding force between the first sheet body and the endothermic layer is smaller than a bonding force between the second sheet body and the endothermic layer.