JP2020000667A - Exothermic article - Google Patents

Abstract

To provide an exothermic article attachable to a human body.SOLUTION: An exothermic article 1 includes: a bag body 3 formed by stacking two sheet materials 30 and 31 and by bonding their outer peripheral edges throughout the entire periphery; an exothermic material 2 sealed in the bag body 3; and a cover 4 disposed on a side of the second sheet material 31 of the bag body 3 so as to form space 5 between the cover 4 and the bag body 3 into which a part of a human body is insertable. The cover 4 is non-air-permeable.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heating device that can heat a part of a body such as a disposable body warmer.

  2. Description of the Related Art As a heating tool used to warm a body, a disposable body warmer in which a powdery heat-generating composition that generates heat by contacting air with a flat bag having air permeability is conventionally known ( For example, see Patent Document 1). A disposable body warmer is frequently used because it is excellent in portability, safety, simplicity and the like and is inexpensive.

  Of this type of heating tool, the so-called non-stick type disposable body warmer, which can not be stuck on clothing, etc., should be warmed by holding it in your hand or held in your hand and put it on the right body Used to warm other parts of the body.

JP-A-5-208031

  The above-mentioned non-stick type disposable body warmer, for example, must be held by hand to warm the fingers, and must be held by hand and kept on the toes to warm the toes There is room for improvement in that you can't warm up while doing something else by hand.

  The present invention has been made in view of the above problems, and has as its object to provide a heating tool that can be worn on a body.

  The heating tool of the present invention includes a bag formed by joining the outer peripheral edges of the surface layer and the back layer over the entire circumference, a heating material sealed in the bag, and the body between the bag. A cover provided on at least one of the front surface layer and the back surface layer of the bag so as to form a space into which a part can be inserted, wherein the cover is non-breathable.

  In the heating tool according to the aspect of the invention, the cover is provided on one of a front surface layer and a back surface layer of the bag body, and the cover layer of the bag body is not provided with the cover. Preferably, the air permeability is lower than that of the layer. In this case, it is more preferable that the layer of the bag body provided with the cover is non-breathable. More preferably, the cover can be turned over through an opening for inserting a part of the body into the space such that the cover is located on the side of the bag where the cover is not provided. Further, it is more preferable that the cover is formed in a size capable of covering the entire surface of the layer of the bag body on which the cover is provided.

  In the heating tool of the present invention, the cover is provided on one of a front surface layer and a back surface layer of the bag body, and the cover is provided on a side of the bag body where the cover is not provided. Preferably, it can be folded. In this case, it is more preferable that the cover is formed in a size capable of covering the entire surface of the front surface layer and the back surface layer of the bag body.

  According to the heating tool of the present invention, the user inserts a part of the body, such as a finger, into the space in the cover provided on the bag, thereby holding the bag on the part of the user's body. It can be applied to a part of the body without having to hold the bag by hand. Therefore, a part of the body can be warmed while performing a work such as reading a book or operating a mobile phone.

  In addition, since the space inside the cover of the heating tool is enhanced in heat retention by the non-breathable cover, a part of the body such as a finger inserted into the space can be effectively warmed. .

It is a perspective view of a heating tool. It is a bottom view of a heating tool. It is AA sectional drawing of FIG. It is a perspective view of the use state of a heating tool. It is a perspective view in the state where a heating tool was turned upside down. It is sectional drawing of the heating tool of a modification. It is sectional drawing of the heating tool of a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 3 show a heating tool 1 according to one embodiment of the present invention. The heating tool 1 includes a heating material 2, a flat bag 3 in which the heating material 2 is sealed, and a part of the body (a hand in this embodiment) between the bag 3 and at least one side of the bag 3. And a cover 4 provided so as to form a space 5 into which a finger can be inserted.

  The exothermic material 2 can be preferably exemplified by, for example, an exothermic composition that generates heat upon contact with air. The exothermic composition may be any as long as it generates heat upon contact with air. Examples of the exothermic composition include an oxidizable metal, activated carbon, and a water retention agent (wood flour, vermiculite, diatomaceous earth, perlite, silica gel, alumina, water absorbent resin Etc.), a metal salt (eg, salt), and water, each of which has an appropriate content, and a known composition conventionally used for disposable warmers can be used. The oxidizable metal is a metal that generates heat of oxidation reaction, and examples thereof include one or more powders and fibers selected from iron, aluminum, zinc, manganese, magnesium, and calcium. Among them, iron powder is preferred from the viewpoint of handleability, safety, production cost, storage stability and stability. Examples of the iron powder include one or more selected from reduced iron powder and atomized iron powder.

  The heating material 2 may be made of a material other than a material that generates heat by contact with air. For example, a material that generates heat when irradiated with microwaves in a microwave oven (for example, a ceramic powder such as ferrite) may be used. You may.

  The bag body 3 includes a surface layer and a back surface layer whose outer peripheral edges are joined over the entire periphery, and has a space for enclosing the heat generating material 2 between the surface layer and the back surface layer. In the present embodiment, the bag body 3 includes two sheet members 30 and 31 each having a rectangular shape in a plan view. The two sheet materials 30 and 31 are overlapped, and the outer peripheral edge thereof is joined to a predetermined width over the entire periphery using, for example, a known adhesive, or joined (heat-sealed) by heat fusion between resin films. For example, it is formed in a bag shape having a space for enclosing the heat generating material 2 therein. The width d1 of the joint 32 between the two sheets 30 and 31 of the bag 3 is not particularly limited, but is preferably about 1 mm or more and 20 mm or less.

  The two sheet members 30 and 31 have flexibility so that the heating tool 1 can be loosened by hand. Further, of the two sheet materials 30 and 31, one sheet material (first sheet material) 30 constituting the surface layer of the bag body 3 has air permeability.

  As the first sheet material 30, it is preferable to use a resin film in consideration of strength, durability of the heat generating material 2 against heat generation, and the like. The resin used for the resin film is not particularly limited, but it is preferable to use a thermoplastic resin. Examples of the thermoplastic resin include polyethylene, polypropylene, polyester, polyamide, polyurethane, polystyrene, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polycarbonate, and ethylene-vinyl acetate copolymer. , Polypropylene and ethylene vinyl acetate copolymer. These resins may be used alone or in combination of two or more.

  A plurality of perforations (not shown) are formed in the resin film used for the first sheet material 30 in order to ensure air permeability, and air communicates with the inside and outside of the bag body 3 through the plurality of perforations. The heating material 2 generates heat by touching the heating material 2. The perforations may be formed in the entire area of the resin film, or may be formed in a part thereof. The size of the perforations is not particularly limited as long as the size of the perforations can be prevented from leaking out of the heat generating material 2 to the outside of the bag body 3, but is preferably about 0.1 mm or more and 0.3 mm or less. The outer shape and number of perforations are not particularly limited, and the size, shape, and number of perforations are appropriately set in consideration of the perceived temperature of the heating tool 1 in use according to the air permeability of the bag 3. As a method of forming perforations in the resin film, a conventionally known method can be used.

  In addition, in consideration of improving the feel of the heating tool 1, the first sheet material 30 is further made of a woven or nonwoven fabric having air permeability, and is a laminate formed by laminating a woven or nonwoven fabric on a resin film. It is preferred to be constituted by In this case, a resin film is disposed on the inner side on the heat generating material 2 side, and a woven or nonwoven fabric is disposed on the outer side.

As a woven or nonwoven fabric material having air permeability, synthetic fibers such as nylon, vinylon, polyester, acrylic, polyethylene, polypropylene, polyvinyl chloride, and polybutylene terephthalate; semi-synthetic fibers such as rayon and acetate; cotton; Natural fibers such as hemp, silk, and paper; mixed fibers of these fibers; Among them, from the viewpoint of improving the feel, examples of the fiber material include nylon, polyester, and polypropylene, and more preferably, nylon and polyester. These fiber materials may be used alone or in combination of two or more. Basis weight of the woven or nonwoven fabric is not particularly limited as long as the basis weight of enough to prevent leakage of the bag body 3 outside of the heat generating material 2, it is preferably of the order 20 g / m ² or more 70 g / m ² or less.

  The other sheet material (second sheet material) 31 constituting the back layer of the bag body 3 is, similarly to the first sheet material 30 described above, a resin film alone or a laminate obtained by laminating a woven or nonwoven fabric on a resin film. It can be composed of a body. When the second sheet material 31 is formed of a laminate in which a woven fabric or a nonwoven fabric is laminated on a resin film, the resin film is disposed on the inner side on the heat generating material 2 side, and the woven or nonwoven fabric is disposed on the outer side. Preferred examples of the resin used for the resin film and the fibrous material of the woven or non-woven fabric are the same as those exemplified for the first sheet material 30.

  The second sheet material 31 may have air permeability or may be non-air permeable, but if it has air permeability, it may have lower air permeability than the first sheet material 30. preferable. Air is supplied to the heat generating material 2 from the second sheet material 31 side because the second sheet material 31 is impermeable to air or has a lower air permeability than the first sheet material 30 even if it has air permeability. In addition to this, it is possible to prevent water vapor generated due to heat generation of the heat generating material 2 from entering the space 5 between the second sheet material 31 and the cover 4. The air permeability of the second sheet material 2 can be controlled by adjusting the number of perforations formed in the resin film constituting the second sheet material 31, and the second sheet material is not formed by forming no perforations. The material 31 can be impermeable.

  The thickness of the two sheets 30 and 31 constituting the bag 3 is not particularly limited, but as the thickness is smaller, the heating tool 1 can be made softer and easier to fit into the hand, but if the thickness is too small. Since the strength of the bag 3 is reduced, it is preferable that the thickness is about 0.1 mm or more and 2.0 mm or less.

  In the present embodiment, the bag body 3 is composed of two sheet materials 30 and 31. However, one sheet material is folded in half and the outer peripheral edge is joined with a predetermined width over the entire circumference. Thereby, it may be formed in a bag shape. In this case, the air permeability of each region can be controlled by adjusting the number of perforations formed in the resin film in each region of one sheet material.

  The cover 4 is made of a non-breathable sheet material. The sheet material forming the cover 4 may be any material that is softly in contact with the skin and non-breathable. For example, like the first sheet material 30 and the second sheet material 31 of the bag body 3 described above, a resin film alone Alternatively, it can be constituted by a laminate obtained by laminating a woven or nonwoven fabric on a resin film. When the sheet material forming the cover 4 is formed of a laminate formed by laminating a woven or nonwoven fabric on a resin film, the resin film is disposed on the inner side on the bag body 3 side, and the woven or nonwoven fabric is disposed on the outer side. You. Preferred examples of the resin used for the resin film and the fibrous material of the woven or non-woven fabric are the same as those exemplified for the first sheet material 30. The sheet material forming the cover 4 has no perforation formed in the resin film, and is made non-breathable.

  In the present invention, the non-breathable means that the sheet material forming the bag 3 or the cover 4 has a hole through which air passes (for example, the above-described perforation formed in the resin film or a thin material originally formed in the material itself). Hole), which means that even if the resin film itself is slightly ventilated, it is impervious.

  In this embodiment, the cover 4 is provided on the second sheet material 31 side of the bag body 3. The cover 4 is joined to at least a part of the second sheet material 31 of the bag body 3 using, for example, a known adhesive, or is joined by pseudo-adhesion between a resin film and a nonwoven fabric (or woven fabric). , Attached to the bag 3. In the present embodiment, the cover 4 is joined to the second sheet material 31 of the bag 3 so that an opening 6 to the space 5 between the cover 4 and the bag 3 is formed in advance. The opening 6 is a part for inserting a part of the body (fingers of the hand in the present embodiment) into the space 5 between the cover 4 and the bag 3, and as shown in FIG. By inserting a part of the body (fingers in this embodiment) into the body, the bag 3 can be held by a part of the user's body (fingers in this embodiment).

  In the cover 4, a part of the outer peripheral edge of the cover 4 and a part of the outer peripheral edge of the second sheet material 31 are joined to each other with a predetermined width. Is preferably attached to the bag body 3 by joining with a width of. Thereby, the space 5 between the cover 4 and the bag body 3 becomes airtight due to the non-breathability of the cover 4 except for the opening 6, so that the heat retention in the space 5 can be improved. .

  The size of the opening 6 is not particularly limited as long as it can receive a part of the body to be inserted into the space 5, in this embodiment, a finger of the hand. It is preferable that the heating tool 1 is designed to have such a size that the heating tool 1 can be turned over through the opening 6 so as to be located on the first sheet 30 side having the following.

  In the present embodiment, the cover 4 has a rectangular shape in plan view having the same shape and size as the bag 3 so as to cover the entire area of one surface of the bag 3 (the surface of the second sheet material 31). The outer peripheral edge of the cover 4 is joined to the outer peripheral edge of the second sheet material 31 at three sides of a pair of short sides and one long side, and an opening 6 to the space 5 is formed on the other long side. In addition, it is designed so that there is no portion other than the opening 6 that is not joined to the second sheet material 31. Also in the present embodiment, the space 5 between the cover 4 and the bag body 3 becomes airtight due to the non-breathability of the cover 4 except for the opening 6, so that the heat retaining property in the space 5 is improved. ing. In addition, as shown in FIG. 5, the heating tool 1 can be turned over through the opening 6.

  In this embodiment, a sheet material prepared separately from the bag body 3 is adhered to the bag body 3 as the cover 4, but the bag body 3 with the cover 4 may be constituted by one sheet material. it can. Specifically, one sheet material is divided into three in the length direction, and the area to be the back layer of the bag 3, the area to be the surface layer of the bag 3, and the area to be the cover 4 are sequentially arranged from one end. And By adjusting the number of perforations formed in the resin film in each region of one sheet material, the air permeability of each region can be controlled. Then, after the region to be the back layer of the bag 3 is folded over the region to be the surface layer of the bag 3 and the outer peripheral edge is joined at a predetermined width over the entire periphery, the region to be the back layer of the bag 3 is covered. The bag body 3 with the cover 4 may be formed by folding the region to be 4 and joining a part of the outer peripheral edge with a predetermined width.

  The joining strength between the cover 4 and the second sheet material 31 of the bag body 3 is not particularly limited, but is set to be smaller than the joining strength of the two sheet materials 30 and 31 of the bag body 3. Preferably it is designed. Thus, when a force is applied to the cover 4 in a direction in which the cover 4 is peeled off from the bag body 3 during use, and the cover 4 is peeled off from the bag body 3, the bag to which the cover 4 is joined with the cover 4 is peeled off. The second sheet material 31 of the body 3 is prevented from being peeled off from the first sheet material 30. As described above, at the joining portion 32 of the bag body 3 when the cover 4 is peeled off, since the two sheet materials 30 and 31 are not peeled off and the joining is maintained, the bag body 3 does not open unexpectedly. Leakage of the heat generating material 2 in the bag 3 can be prevented.

  The bonding strength between the cover 4 and the second sheet material 31 of the bag body 3 is not particularly limited as long as it is smaller than the bonding strength of the two sheet materials 30 and 31 of the bag body 3, but is not limited to 10 N / 15 mm width. Is preferably less than 8.0 N / 15 mm width. If the bonding strength between the cover 4 and the second sheet material 31 of the bag 3 is not more than 8.0 N / 15 mm width, the cover 4 can be moved to the second position by slightly pulling the cover 4 away from the bag 3. It becomes possible to peel off from the sheet material 31. Therefore, even if the opening 6 leading to the space 5 between the cover 4 and the bag body 3 is formed small at first, the cover 6 is formed according to the size and the number of fingers to be inserted, in this embodiment, a part of the body. By gradually peeling 4 from the second sheet material 31 of the bag body 3, the size of the opening 6 can be adjusted to a large value. This makes it possible to prevent the opening 6 from being excessively widened by setting the size of the opening 6 to such an extent that a part of the body to be inserted into the space 5 can enter, so that heat from the opening 6 is prevented from escaping to the outside of the space 5. The heat retention in the space 5 can be effectively improved. Therefore, the part of the body inserted into the space 5 can be better warmed. In addition, since the opening 4 is not too large with respect to a part of the body to be inserted, the cover 4 follows the movement of the body satisfactorily, so that the fit to the body can be improved. The bonding strength between the cover 4 and the second sheet material 31 of the bag body 3 is not less than 6.0 N / 15 mm width so that the cover 4 is not easily separated from the second sheet material 31. Preferably, there is.

  On the other hand, the bonding strength of the two sheet materials 30 and 31 of the bag body 3 is 10 N / N so that the two sheet materials 30 and 31 are firmly bonded at the bonding portion of the bag body 3 and do not peel off. The width is preferably 15 mm or more, more preferably 12 N / 15 mm or more.

  The method for measuring the above-mentioned bonding strength is as follows. First, as shown by a two-dot chain line in FIG. 1, the joining strength of the two sheet materials 30 and 31 of the bag 3 is such that the bag 3 with the cover 4 includes the joining portion 32 and has a width D of 15 mm and a length of 15 mm. L: After cutting out three 50 mm strip samples each, using a push-pull scale (PS, manufactured by Imada Co., Ltd.), two sheet materials of each sample at a pulling speed of 300 mm / min and a gripping distance of 20 mm. It is calculated by measuring the peel strength (N / 15 mm width) of 30, 31 and averaging each measured value.

  The bonding strength between the cover 4 and the second sheet material 31 of the bag body 3 is likewise indicated by a two-dot chain line in FIG. After cutting out three strip-shaped samples each having a width D: 15 mm and a length L: 50 mm so as to include the joint portion, using a push-pull scale (PS, manufactured by Imada Co., Ltd.) at a pulling speed of 300 mm / min. It is calculated by measuring the peel strength (N / 15 mm width) of the cover 4 and the second sheet material 31 of each sample at an interval of 20 mm, and averaging the measured values.

  The width d2 of the joint 40 between the cover 4 and the second sheet material 31 of the bag 3 is not particularly limited, but the width d1 of the joint 32 of the two sheets 30 and 31 of the bag 3 is not limited. Or smaller than the width d1. Accordingly, when the cover 4 is separated from the bag body 3, the second sheet material 31 is pulled by the cover 4 along with the separation of the cover 4 inside the joint portion 32, and the second sheet material 31 may be damaged. In addition, it is possible to prevent the joining strength between the second sheet material 31 and the first sheet material 30 from being reduced.

  According to the heating tool 1 having the above configuration, as shown in FIG. 4, the user places a part of the body in the space 5 in the cover 4 provided on one side (the second sheet material 31) of the bag body 3. For example, by inserting the fingers of the hand, the bag 3 is held by the fingers of the user's hand, so that the bag 3 can be brought into close contact with the fingers without holding the bag 3 by hand. Therefore, for example, the fingers of the hands can be warmed while performing a work such as reading a book or operating a mobile phone. In addition, the heating tool 1 held in the hand can be heated by applying the heating tool 1 to another part of the body.

  The space 5 in the cover 4 of the heating tool 1 is airtight due to the non-breathability of the cover 4 to enhance the heat retention. Therefore, a part of the body such as a finger inserted into the space 5 can be effectively warmed.

  When the use of the heating tool 1 is temporarily stopped after use, as shown in FIG. 5, the heating tool 1 is passed through the opening 6 so that the cover 4 is provided on the first sheet 30 side of the bag 3. Is turned over, the heat generating material 2 in the bag body 3 can be covered with the non-breathable cover 4 and the second air-permeable or non-breathable second sheet material 32. Thereby, air can be prevented from touching the heat generating material 2 as much as possible when not in use. The heating tool 1 of the present embodiment generates heat when the heat generating material 2 comes into contact with air, so that the heat generation is maintained while the heat generating material 2 continues to contact with air, and stops generating heat by generating heat for a predetermined time. . Therefore, by temporarily stopping the heat generation of the heat generating material 2 by preventing air from coming into contact with the heat generating material 2 when not in use, the heat generation holding time can be maintained for that time, and the heat generation tool 1 can be made to last longer. it can.

  As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the cover 4 is joined to the outer peripheral edge of the second sheet material 31 at three sides of a pair of short sides and one long side of the outer peripheral edges. And one of the short sides may be joined to the outer peripheral edge of the second sheet material 31.

  Further, in the above-described embodiment, the cover 4 is joined to the outer peripheral edge of the second sheet material 31 at three sides of the outer peripheral edge. However, as shown in FIG. Another opening 7 may be provided at a position facing the opening 6 by being joined to the outer peripheral edge of the second sheet material 31 at a shorter side (or a longer side in FIG. 6).

  In the above embodiment, the cover 4 is joined to the second sheet material 31 of the bag 3 so that the openings 6 and 7 to the space 5 between the cover 3 and the bag 3 are formed in advance. For example, since the outer peripheral edges of the cover 4 and the second sheet material 31 are joined to each other over the entire periphery, a part of the outer peripheral edge of the cover 4 can be partially used at the time of use even if the openings 6 and 7 are not initially formed. The openings 6 and 7 may be formed by peeling the openings 6 and 7 from the second sheet material 31.

  In the above-described embodiment, the outer edges of the cover 4 and the second sheet material 31 are joined to each other. However, the outer edges need not necessarily be joined to each other. The cover 4 may be joined to a region inside the outer periphery, or a part of the cover 4 inside the outer periphery may be joined to the second sheet material 2.

  Further, in the above embodiment, the cover 4 has the same shape and size as the bag 3, but the cover 4 has a portion excluding the opening 6 on the outer peripheral edge so as to form a space 5 between the cover 4 and the bag 3. May be different in shape and size from the bag body 3 as long as is bonded to the outer peripheral edge of the second sheet material 31 of the bag body 3. For example, as shown in FIG. 7, the cover 4 is formed to be larger than the bag 3, and the cover 4 is folded so that the surface of the bag 3 on the first sheet material 30 side can be covered. You may. As a result, the heat generating material 2 in the bag body 3 can be covered with the non-breathable cover 4, so that when the heat generating material 2 is not used, the air is prevented from touching the heat generating material 2 as much as possible, and the heat generation of the heat generating material 2 is temporarily stopped. This makes it possible to maintain the heat generation holding time by that amount, and to make the heat generation tool 1 last longer. The cover 4 may simply extend longer than the bag 3, but as shown in FIG. 7, the portion of the cover 4 protruding from the bag 3 has a double structure and is formed on both sides. The edges may be joined to each other and the folded leading edge may be joined to the outer peripheral edge (long side) of the bag body 3 to form a pocket and accommodate a part of the body. .

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

  Further, in the above embodiment, the bag 3 has a rectangular shape in plan view, but may have other various shapes such as a square, a polygon, a circle, and an ellipse.

  Further, in the above embodiment, the heating tool 1 is designed to insert the fingers of the user's hand into the space 5 in the cover 4, but other parts of the body (for example, toes and head). May be designed to be inserted.

DESCRIPTION OF SYMBOLS 1 Heating tool 2 Heating material 3 Bag 4 Cover 5 Space 6 Opening 30 1st sheet material 31 2nd sheet material 32 Joint

Claims (7)

A bag formed by joining the outer edges of the surface layer and the back layer over the entire circumference,
A heating material sealed in the bag body;
A cover provided on at least one of a front surface layer and a back surface layer of the bag so as to form a space in which a part of the body can be inserted between the bag and the bag.
The heating device, wherein the cover is non-breathable. The cover is provided on one of a front surface layer and a back surface layer of the bag body,
The heating tool according to claim 1, wherein a layer of the bag body provided with the cover has a lower air permeability than a layer provided with no cover.   The heating tool according to claim 2, wherein the layer of the bag provided with the cover is non-breathable.   The heat generation device according to claim 2 or 3, wherein the cover can be turned over through an opening for inserting a part of a body into the space so that the cover is located on a side of the bag body where the cover is not provided. Utensils.   The heating tool according to claim 4, wherein the cover is formed in a size capable of covering the entire surface of the layer of the bag body on which the cover is provided. The cover is provided on one of a front surface layer and a back surface layer of the bag body,
The heating tool according to claim 1, wherein the cover is foldable on a side of the bag body on which the cover is not provided.   The heating tool according to claim 6, wherein the cover is formed in a size capable of covering the entire surface layer and the rear surface layer of the bag body.