TW202000162A - Heat generator - Google Patents

Abstract

Provided is a heat generator that can be worn on the body. A heat generator comprises: a bag that is formed by stacking two sheets, and bonding the entire outer edge of the sheets; a heat generation material that is sealed in the bag; and a cover that is provided on the second sheet side of the bag so as to form, with the bag, a space into which a portion of the body can be inserted. The cover is non-permeable.

Description

Heating element

The present invention relates to a heating element capable of warming a part of the body such as a disposable stove.

As a heating element for warming the body, there is conventionally known a disposable hearth. The above-mentioned disposable hearth is a powder-like exothermic composition that generates heat by contact with air is enclosed in a gas-permeable flat bag body (For example, refer to Patent Document 1). Disposable furnaces are frequently used because they are excellent and cheap in portability, safety, and convenience.

Among such heating elements, it is not possible to attach clothing or the like. The so-called non-stick disposable stove is used to warm hands by holding the hand, or by holding this object and touching a suitable part of the body to warm The rest of the body. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. H05-208031

[Summary of the Invention] [Problem to be solved by invention] For example, the above-mentioned non-stick disposable stove must be held continuously with a hand in order to warm the fingers, and must be held with the hands and kept touching the toes in order to warm the toes, so other tasks cannot be done with the hands. There is room for improvement on the heating side.

The present invention was made focusing on the above-mentioned problems, and aims to provide a heating element that can be worn on the body. [Means to solve the problem]

The heating element of the present invention is characterized by comprising: a bag body formed by joining outer peripheral edges of the surface layer and the inner layer over the entire circumference; a heat generating material enclosed in the bag body; and a cover sleeve to be connected to the bag body A space in which a part of the body can be inserted is formed between at least one of the surface layer and the back layer of the bag body, and the cover is non-breathable.

In the heating element of the present invention, the cover is provided on one of the surface layer and the back layer of the bag body, and the layer provided with the cover cover of the bag body is compared with the layer without the cover cover. The air permeability should be lower. In this case, the layer of the bag body provided with the cover is more preferably non-breathable. Moreover, it is more preferable that the inside can be turned outward through an opening for inserting a part of the body into the space so that the cover is located on the layer side of the bag body where the cover is not provided. Moreover, it is more preferable that the cover is formed to a size that can cover the entire surface of the layer of the bag body on which the cover is provided.

In addition, in the heating element of the present invention, the cover sleeve is provided on one of the surface layer and the back layer of the bag body, and the cover sleeve is preferably capable of being folded and overlapped to the bag body without the cover sleeve provided. Layer side. In this case, it is more preferable that the cover sleeve is formed to a size that can cover the entire surface of the surface layer and the back layer of the bag body. [Effect of invention]

According to the heating element of the present invention, the user inserts a part of the body such as a finger into the space provided in the cover of the bag body, so that the bag body can be held on a part of the body of the user, so that The bag touched a part of the body. Therefore, it is possible to warm a part of the body while doing work such as reading or operating a mobile phone.

On top of this, the space in the cover of the heating element is non-breathable to improve thermal insulation, so it can effectively warm a part of the body such as fingers inserted into the space.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a heat generating element 1 according to an embodiment of the present invention. The heating element 1 includes: a heating material 2; a bag body 3 that is flat and encloses the heating material 2; and a cover 4 to form a part (a finger in this embodiment) that can be inserted into the body with the bag body 3 The space 5 is provided on at least one side of the bag body 3.

The heat generating material 2 is, for example, a heat generating composition that generates heat by contact with air, for example. The heat-generating composition may be anything that generates heat by contact with air, for example, a well-known composition used in a disposable furnace that can be oxidized, activated carbon, and water retention can be used. Agents (wood powder, vermiculite, diatomaceous earth, perlite, silica gel, alumina, water-absorbent resin, etc.), metal salts (table salt, etc.) and water, and each contains an appropriate content. The oxidizable metal is a metal that generates heat by an oxidation reaction, and examples thereof include powders and fibers selected from one or more of iron, aluminum, lead, manganese, magnesium, and calcium. Among them, iron powder is preferable from the viewpoint of handling, safety, manufacturing cost, storage, and safety. For the iron powder, for example, one or two or more selected from reduced iron powder and atomized iron powder can be mentioned.

In addition, the heat generating material 2 may be a material other than a material that generates heat by contact with air, for example, a material that generates heat by receiving microwave irradiation such as a microwave oven (for example, ceramic powder such as ferrite).

The bag body 3 includes a surface layer and an inner layer that join the outer peripheral edge of the entire circumference, and has an enclosed space for the heat generating material 2 between the surface layer and the inner layer. In the present embodiment, the bag body 3 is formed of two sheets 30 and 31 that are rectangular in plan view. The two sheets 30 and 31 are overlapped, and the outer peripheral edge is bonded to the predetermined width with a known adhesive, for example, or by thermal fusion bonding of the resin films (heat sealing), etc. Inside, a bag-like shape having an enclosed space of the heat generating material 2 is formed. The width d1 of the joining portion 32 of the two sheets 30 and 31 of the bag body 3 is not particularly limited, but it is preferably about 1 mm to 20 mm.

The two sheets 30 and 31 have flexibility as if the heating element 1 was rubbed by hand. Among the two sheets 30 and 31, one sheet (first sheet) 30 constituting the surface layer of the bag body 3 has air permeability.

For the first sheet 30, a resin film is preferably used when considering strength and durability against heat generated by the heat generating material 2. The resin used in the resin film is not particularly limited, but it is preferably a thermoplastic resin. For thermoplastic resins, examples include polyethylene, polypropylene, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, and ethylene/vinyl acetate copolymer. However, among them, polyethylene, polypropylene, and ethylene/vinyl acetate copolymer are preferred. These resins may be used alone or in combination of two or more.

In order to ensure air permeability, a plurality of perforations (not shown in the figure) are formed in the resin film used for the first sheet 30, through which the air communicates with the inside and outside of the bag body 3 and the heat generating material 2 The heating material 2 generates heat. The perforation may be formed on the entire area of the resin film, or may be formed on a portion. In addition, the size of the perforation is not particularly limited as long as it can prevent the heat generating material 2 from leaking out of the bag body 3, but it is preferably about 0.1 mm or more and 0.3 mm or less. The shape and number of the perforations are not particularly limited. The size, shape, and number of the perforations are appropriately set in consideration of the body temperature of the heating element 1 when the air permeability of the bag body 3 is used. As a method of forming a perforation in the resin film, a conventionally known method can be used.

In addition, if the feel of the heating element 1 is considered to be good, the first sheet 30 is further laminated with a woven or non-woven fabric having air permeability, and the woven or non-woven fabric is laminated on the resin film. Body style is better. In this case, the resin film is arranged on the inner side of the heat generating material 2 side, and the woven or non-woven fabric is arranged on the outer side.

Examples of fiber materials with breathable woven or non-woven fabrics include nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, polyvinyl chloride (PVC), and polybutylene terephthalate. Synthetic fibers such as rayon; semi-synthetic fibers such as rayon and acetate; natural fibers such as cotton, hemp, silk, and paper; mixed fibers of these fibers. Among them, from the viewpoint of making the touch feel good, nylon, polyester, polypropylene, etc. can be exemplified as the fiber material, and nylon and polyester are more preferable. These fiber materials may be used alone or in combination of two or more. The basis weight of the woven or non-woven fabric is not particularly limited as long as it can prevent the heat generating material 2 from leaking out of the bag body 3, but it is preferably about 20 g/m ² or more and 70 g/m ² or less.

The other sheet (second sheet) 31 constituting the inner layer of the bag body 3 is the same as the first sheet 30 described above, and can be formed by laminating a woven fabric or a non-woven fabric on the resin film alone or on the resin film To form a laminate. When the second sheet 31 is constituted by a laminate formed by laminating a woven or non-woven fabric on a resin film, the resin film is arranged on the inner side of the heat generating material 2 side, and the woven or non-woven fabric is arranged on the outer side. The resin used for the resin film and the fiber material of the woven or non-woven fabric are preferably the same as those exemplified in the first sheet 30.

The second sheet 31 may be air-permeable or non-air-permeable, but in the case of air permeability, the air permeability is preferably lower than that of the first sheet 30. The second sheet 31 is not air-permeable or air-permeable but the air permeability is lower than that of the first sheet 30, which not only suppresses the supply of air from the second sheet 31 side to the heat generating material 2, but also suppresses the accompanying The water vapor generated by the heat generation of the heat generating material 2 enters the space 5 between the second sheet 31 and the cover 4. The air permeability of the second sheet 2 can be controlled by adjusting the number of perforations formed on the resin film constituting the second sheet 31 for ventilation, and the second sheet 31 can be made by not forming perforations Non-breathable.

The thickness of the two sheets 30 and 31 constituting the bag body 3 is not particularly limited, but the smaller the thickness, the softer the heating element 1 and the better the hand touch. On the other hand, if the thickness is too small, the bag body 3 The strength decreases, so it is preferably 0.1 mm or more and 2.0 mm or less.

In addition, in the present embodiment, the bag body 3 is composed of two sheets 30, 31, but one sheet may be folded and folded at half and the outer periphery may be joined at a predetermined width over the entire circumference. This is used to form a bag. In this case, the air permeability of each area can be controlled by adjusting the number of perforations formed in the resin film in each area of one sheet.

The cover 4 is made of a non-breathable sheet. The sheet material constituting the cover cover 4 may be softly in contact with the skin and non-breathable. For example, it may be the same as the first sheet material 30 and the second sheet material 31 of the bag body 3 described above. The body may be a laminate formed by laminating a woven fabric or a non-woven fabric on a resin film. When the sheet material constituting the cover 4 is formed of a laminate formed by laminating a woven or non-woven fabric on a resin film, the resin film is arranged on the inner side of the bag body 3 and the woven fabric is arranged on the outer side Or non-woven. The resin used for the resin film and the fiber material of the woven or non-woven fabric are preferably the same as those exemplified in the first sheet 30. The sheet material constituting the cover 4 does not form a perforation for ventilation in the resin film, thereby making it non-breathable.

In addition, the non-breathability in the present invention means that the sheets constituting the bag body 3 and the cover cover 4 do not have holes for passing air (for example, the above-mentioned perforations are formed in the resin film or the fine holes originally formed in the material itself) For example, even if the resin film itself is slightly breathable, it is included in non-breathability.

The cover 4 is provided on the second sheet 31 side of the bag body 3 in this embodiment. The cover 4 is bonded to at least a part of the second sheet 31 of the bag body 3 using, for example, a well-known adhesive, or by pseudo-bonding of a resin film and a non-woven fabric (or woven fabric), etc. Thus, it is installed on the bag body 3. In this embodiment, the cover 4 is joined to the second sheet 31 of the bag body 3 so that the opening 6 facing the space 5 between the bag body 3 is formed in advance. The opening 6 is a portion for inserting a part of the body (finger in this embodiment) into the space 5 between the cover 4 and the bag body 3, as shown in FIG. In the form of a finger, it is inserted into the space 5, whereby the bag body 3 can be held on a part of the user's body (finger in this embodiment).

The cover 4 is preferably a part of the outer periphery of the cover 4 and the second sheet 31 joined to each other with a predetermined width, that is, the outer periphery of the cover 4 and the second sheet 31 except for the portion of the opening 6 It is joined with a predetermined width, thereby being mounted on the bag body 3. As a result, the space 5 between the cover 4 and the bag body 3 is made airtight by making the cover 4 other than the opening 6 non-breathable, so the thermal insulation in the space 5 can be improved.

If the size of the opening 6 is a part of the body capable of accommodating the insertion space 5, the size of the finger in this embodiment is not particularly limited, but it should be designed so that the inside of the heating element 1 can be turned out through the opening 6 so that The cover cover 4 is positioned to the extent that it is located on the side of the first sheet 30 having air permeability of the bag body 3.

In the present embodiment, the cover 4 exhibits the same shape and size of the bag body 3 as a rectangular shape in plan view so as to cover the entire area of one aspect of the bag body 3 (the surface of the second sheet 31 ). Furthermore, the outer peripheral edge of the cover 4 is joined to the outer peripheral edge of the second sheet 31 by a pair of short sides and three sides of one long side, and the other long side forms an opening 6 toward the space 5 and is designed There is no part other than the opening 6 that is not joined to the second sheet 31. Also in this embodiment, since the space 5 between the cover 4 and the bag body 3 is made airtight by the cover 4 except for the opening 6, the heat insulation in the space 5 can be improved. In addition, as shown in FIG. 5, the inside of the heating element 1 can be turned out through the opening 6.

In addition, in this embodiment, although the sheet prepared separately from the bag body 3 is attached to the bag body 3 as the cover case 4, the bag body 3 with the cover case 4 can also be constituted by one sheet. Specifically, one sheet is divided into three in the longitudinal direction, and the area of the inner layer of the bag 3, the area of the surface layer of the bag 3, and the area of the cover 4 are sequentially formed from one end. By adjusting the number of perforations formed in the resin film in each region of one sheet, the air permeability of each region can be controlled. In addition, after folding the area of the back layer of the bag body 3 to overlap the area of the surface layer of the bag body 3 and joining the outer periphery with a predetermined width over the entire circumference, the area of the cover 4 can be folded to overlap the bag The region of the inner layer of the body 3 joins a part of the outer periphery with a predetermined width, thereby forming the bag body 3 with the cover 4 attached.

The bonding strength of the cover 4 and the second sheet 31 of the bag body 3 is not particularly limited, but the strength is preferably designed to be smaller than the bonding strength of the two sheets 30 and 31 of the bag body 3. This prevents the second sheet 31 of the bag 3 to which the cover 4 is attached when the cover 4 exerts a force in the direction of peeling from the bag 3 while the cover 4 is peeled from the bag 3. As the cover 4 peels off, it peels from the first sheet 30. In this way, when the cover 4 is peeled off, the two sheets 30, 31 at the joint portion 32 of the bag body 3 can be kept without peeling off and the joint is maintained, so that the bag body 3 is not suddenly opened and the bag body 3 can be prevented The leakage of the heat generating material 2 inside.

The bonding strength of the cover 4 and the second sheet 31 of the bag body 3 is not particularly limited if it is less than the bonding strength of the two sheets 30, 31 of the bag body 3, but it is preferably less than 10N/15mm wide, more preferably It is less than 8.0N/15mm wide. When the bonding strength between the cover 4 and the second sheet 31 of the bag body 3 is 8.0 N/15 mm or less, if the cover 4 is peeled from the bag body 3 with some force, the cover 4 can be removed from the second piece The material 31 peels off. Therefore, even if the opening 6 communicating with the space 5 between the cover 4 and the bag body 3 is initially formed to be small, the cover can be replaced with the size or number of fingers according to the part of the body inserted in this embodiment The cover 4 is slowly peeled from the second sheet 31 of the bag body 3, thereby greatly adjusting the size of the opening 6. Thereby, since the size of the opening 6 is set to such a degree that a part of the body inserted into the space 5 enters, the opening 6 can not be excessively expanded, and therefore, it is possible to suppress the outflow of heat from the opening 6 to the outside of the space 5 and to The thermal insulation in the space 5 is effectively improved. Therefore, a part of the body inserted into the space 5 can be warmed more favorably. In addition, the opening 6 is not too large with respect to a part of the inserted body, whereby the cover 4 can follow the movement of the body well, so that the fit to the body can be improved. In addition, in order to prevent the cover 4 from being easily peeled from the second sheet 31, the bonding strength between the cover 4 and the second sheet 31 of the bag body 3 is preferably 6.0 N/15 mm wide or more.

On the other hand, in order to firmly join the two sheets 30, 31 at the joint portion of the bag 3 without peeling off, the joining strength of the two sheets 30, 31 of the bag 3 is preferably 10 N/15 mm wide or more, More preferably, it is more than 12N/15mm wide.

The measurement method of the above-mentioned bonding strength is as follows. First, as shown by the two-dot chain line in FIG. 1, three short-shaped samples with a width D of 15 mm and a length L of 50 mm were cut out from the bag body 3 with the cover 4 including the joint 32. The peel strength (N/15mm width) of the two sheets 30, 31 of each sample was measured using a push-pull force gauge (manufactured by Imada Corporation, PS) at a tensile speed of 300 mm/min and a grab interval of 20 mm. The measured value is used to calculate the bonding strength of the two sheets 30 and 31 of the bag body 3.

Also, as shown by the two-dot chain line in FIG. 1, three pieces of width D: 15 mm and length are cut out from the bag body 3 with the cover cover 4 so as to include the joint portion of the cover cover 4 and the second sheet 32. L: After a 50-mm short book-shaped sample, the cover 4 and the second sheet 31 of each sample were measured with a push-pull force gauge (manufactured by Imada Co., Ltd., PS) at a drawing speed of 300 mm/min and a grab interval of 20 mm. The peel strength (N/15 mm width) was averaged, and each measured value was averaged to calculate the joint strength between the cover 4 and the second sheet 31 of the bag body 3.

The width d2 of the joint 40 between the cover 4 and the second sheet 31 of the bag 3 is not particularly limited, but it is preferably the same as the width d1 of the joint 32 of the two sheets 30 and 31 of the bag 3 or Less than width d1. Thereby, it is possible to prevent the second sheet 31 inside the joint 32 from being pulled apart by the cover 4 as the cover 4 peels off when the cover 4 is peeled off from the bag body 3, thereby making the second piece When the material 31 is damaged or the bonding strength between the second sheet 31 and the first sheet 30 is reduced.

According to the heat generating element 1 configured as described above, as shown in FIG. 4, the user inserts a part of the body, for example, a finger, into the space 5 in the cover 4 provided on the first side (second sheet 31) side of the bag body 3 to borrow Since the bag body 3 is held by the user's finger, the bag body 3 and the like can be closely attached to the finger even without holding the bag body 3 or the like. Therefore, it is still possible to warm a part of the body while doing work such as reading or operating a mobile phone. On top of this, it is also possible to warm that part by touching the heating element 1 held in the hand to other parts of the body.

In addition, the space 5 in the cover 4 of the heating element 1 is airtight due to the non-breathability of the cover 4 and improves heat insulation. Therefore, it is possible to effectively warm a part of the body such as a finger inserted into the space 5.

In addition, after the use of the heating element 1 is temporarily suspended, as shown in FIG. 5, the inside of the heating element 1 is turned out through the opening 6 so that the cover 4 is provided on the first sheet of the bag body 3 On the 30 side, the heat-generating material 2 in the bag body 3 can be covered with the non-breathable cover 4 and the second sheet 32 with low air permeability or non-breathability. Thereby, when not in use, air can be prevented from hitting the heat generating material 2 as much as possible. Since the heat generating element 1 of the present embodiment generates heat by contacting the heat generating material 2 with air, heat generation is maintained while the heat generating material 2 is continuously in contact with air, and the heat generation becomes non-heating after a predetermined time. Therefore, by temporarily stopping the heat generation of the heat-generating material 2 so that the air does not contact the heat-generating material 2 as much as possible during non-use, it is possible to maintain the heat retention time of a part of the heat-generating material 2 and make the heat-generating element 1 last.

The embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments, and various changes may be made without departing from the gist of the present invention.

For example, in the above-mentioned embodiment, the cover 4 is joined to the outer periphery of the second sheet 31 by three sides of a pair of short sides and one long side of the outer periphery, but it is also possible to use a pair of long sides and Three of the short sides are joined to the outer periphery of the second sheet 31.

Furthermore, in the above embodiment, the cover 4 is joined to the outer periphery of the second sheet 31 with three sides of the outer periphery. However, as shown in FIG. 6, a pair of opposite sides of the outer periphery (in FIG. 6 shows the short side but the long side may be bonded to the outer peripheral edge of the second sheet 31, and another opening 7 is provided at a position facing the opening 6 described above.

Furthermore, in the above-described embodiment, the cover 4 is joined to the second sheet 31 of the bag body 3 in such a manner that the openings 6 and 7 facing the space 5 between the bag body 3 are formed in advance. The outer periphery of the cover 4 and the second sheet 31 are joined to each other throughout the entire circumference, and even if the openings 6 and 7 are not formed at the beginning, a part of the outer periphery of the cover 4 is removed from the second sheet 31 of the bag body 3 during use Peel off, thereby forming openings 6,7.

Moreover, in the above embodiment, the outer peripheral edges of the cover 4 and the second sheet 31 are joined to each other, but there is no need to join the outer peripheral edges to each other. The outer periphery of the cover 4 may be joined to the second The region inside the inner peripheral edge of the sheet 31 may be joined to the second sheet 2 by a part of the region inside the outer peripheral edge of the cover 4.

In addition, in the above embodiment, the cover 4 is the same shape and size as the bag body 3, but if the cover 4 is to form a space 5 between the bag body 3 and the outer peripheral edge except the opening 6 is joined to The outer periphery of the second sheet 31 of the bag body 3 may be different from the shape and size of the bag body 3. For example, as shown in FIG. 7, the cover case 4 may be formed to be larger than the bag body 3 and configured to cover the surface of the bag body 3 on the side of the first sheet 30 by folding back the cover case 4. Thereby, the heat-generating material 2 in the bag body 3 can be covered with the non-breathable cover 4, so that the heat generation of the heat-generating material 2 is temporarily stopped without touching the heat-generating material 2 when not in use, thereby maintaining Part of the heat retention time, and can make the heating element 1 last. In addition, the cover sleeve 4 may simply extend to be longer than the bag body 3, but as shown in FIG. 7, the portion of the cover sleeve 4 protruding from the bag body 3 may be constituted by making a double structure and the edges on both sides The folded front end edge is joined to the outer peripheral edge (long side) of the bag body 3 to form a pocket shape and can accommodate a part of the body.

In addition, in the above embodiment, the cover 4 is provided only on the second sheet 31 side of the bag body 3, but the cover 4 may be provided on the first sheet 30 side.

In addition, in the above-mentioned embodiment, although the bag body 3 has a rectangular shape in plan view, it may have a square shape, a polygonal shape, a circular shape, an elliptical shape, or other various shapes.

Furthermore, in the above embodiment, although the heating element 1 is designed to insert the user's finger into the space 5 in the cover 4, it may be designed to be inserted into other parts of the body (for example, toes or head).

1‧‧‧heating parts 2‧‧‧heating material 3‧‧‧Bag 4‧‧‧cover 5‧‧‧Space 6‧‧‧ opening 7‧‧‧ opening 30‧‧‧First sheet 31‧‧‧2nd sheet 32‧‧‧Joint 40‧‧‧Joint L‧‧‧Length D‧‧‧Width d1‧‧‧Width d2‧‧‧Width

Fig. 1 is a perspective view of a heating element. Fig. 2 is a bottom view of the heating element. Fig. 3 is a cross-sectional view taken along line A-A of Fig. 1. Fig. 4 is a perspective view of the use state of the heat generating element. Fig. 5 is a perspective view of a state where the inside of the heating element is turned inside out. Fig. 6 is a cross-sectional view of a heating element according to a modification. 7 is a cross-sectional view of a heating element according to a modification.

1‧‧‧heating parts

3‧‧‧Bag

30‧‧‧First sheet

31‧‧‧2nd sheet

4‧‧‧cover

40‧‧‧Joint

5‧‧‧Space

6‧‧‧ opening

L‧‧‧Length

D‧‧‧Width

Claims (7)

A heating element with: The bag body is formed by joining the outer peripheral edges of the surface layer and the inner layer over the entire circumference; The heat generating material is enclosed in the aforementioned bag; and The cover is provided on at least one of the surface layer and the back layer of the bag body so as to form a space in which a part of the body can be inserted between the cover body and the bag body, The aforementioned cover is non-breathable. The heating element according to claim 1, wherein the cover is provided on one of the surface layer and the back layer of the bag body, The layer of the bag body provided with the cover sleeve has a lower air permeability than the layer without the cover sleeve. The heating element according to claim 2, wherein the layer of the bag body provided with the cover is non-breathable. The heating element according to claim 2 or 3 can be turned inside out through the opening for inserting a part of the body into the space, so that the cover is located on the layer side of the bag body where the cover is not provided. The heat generating element according to claim 4, wherein the cover is formed to a size capable of covering the entire surface of the layer of the bag body provided with the cover. The heating element according to claim 1, wherein the cover is provided on one of the surface layer and the back layer of the bag body, The cover can be folded and overlapped to the layer side of the bag body where the cover is not provided. The heat generating element according to claim 6, wherein the cover is formed to a size that can cover the entire surface of the surface layer and the back layer of the bag body.

Images