JP5736169B2

JP5736169B2 - Heating tool

Info

Publication number: JP5736169B2
Application number: JP2010291764A
Authority: JP
Inventors: 泰人斉田; 学外村
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2010-12-28
Filing date: 2010-12-28
Publication date: 2015-06-17
Anticipated expiration: 2030-12-28
Also published as: JP2012135586A

Description

本発明は、人体又は着衣に貼付して適用して温感を付与する発熱具に関する。 The present invention relates to a heating tool that is applied to a human body or clothes to give a warm feeling.

いわゆる使い捨てカイロを始めとする発熱具には、これを人体又は着衣に貼付する目的で、粘着剤が塗布されているものがある。この場合、発熱具が使用されるまでの間、粘着剤は離型シート等によって保護されている。使用に際しては離型シートを剥がし、露出した粘着剤を下着や肌等に当接させる。剥がされた離型シートは廃棄され、再使用されることはない。しかし、昨今の省資源・エコロジーの観点から、廃棄物が極力生じないようにすることが望まれている。 Some heating tools such as so-called disposable body warmers are coated with an adhesive for the purpose of sticking it to a human body or clothes. In this case, the adhesive is protected by a release sheet or the like until the heating tool is used. In use, the release sheet is peeled off, and the exposed adhesive is brought into contact with the underwear or the skin. The peeled release sheet is discarded and cannot be reused. However, from the viewpoint of recent resource saving and ecology, it is desired to minimize the generation of waste.

前記の観点から、特許文献１においては、粘着剤及び離型シートを設けた包材と通気性包材とからなり、かつ折目を有するシール部で複数の室に区画されてなる発熱剤収納袋に発熱剤を収納した粘着発熱体を、折目の部分で折り重ねた状態で、非通気性袋に収納することが提案されている。この離型シートは両面離型シートであり、各々の粘着剤塗布部分が、両面離型シートの表裏各面でそれぞれ被覆されるように、折目の部分で折り重ねられている。両面離型シートを用いることで、離型シートの使用量を、片面離型シートの半分にできる。 From the above viewpoint, Patent Document 1 discloses a heat generating agent storage that is composed of a packaging material provided with an adhesive and a release sheet, and a breathable packaging material, and is partitioned into a plurality of chambers by seal portions having folds. It has been proposed to store an adhesive heating element in which a heat generating agent is stored in a bag in a non-breathable bag in a state of being folded at a fold. This release sheet is a double-sided release sheet, and is folded at the folds so that each adhesive-coated part is covered with the front and back surfaces of the double-sided release sheet. By using a double-sided release sheet, the amount of the release sheet used can be half that of the single-sided release sheet.

実開平６−３６６２３号公報Japanese Utility Model Publication No. 6-36623

しかし、同文献に記載の発熱体においては、両面離型シートを用いることで離型シートの使用量を片面離型シートの半分にできるという利点はあるものの、粘着剤が外縁にまで塗布されていないので、使用前の状態において、外縁域に小さな力がかかっただけでも、両面離型シートと粘着剤とが剥離してしまう傾向がある。加えて、使用中の状態、すなわち、発熱体を着衣や肌に貼付した状態においても、外縁域がめくれ上がりやすく、ひいては発熱体の剥離が起こりやすいという不都合もある。 However, in the heating element described in the same document, there is an advantage that the use amount of the release sheet can be reduced to half that of the single-sided release sheet by using the double-sided release sheet, but the adhesive is applied to the outer edge. Therefore, even when a small force is applied to the outer edge area in a state before use, the double-sided release sheet and the adhesive tend to peel off. In addition, even in a state in use, that is, in a state where the heating element is applied to clothes or skin, there is a disadvantage that the outer edge region is likely to be turned up and the heating element is likely to be peeled off.

上述のような問題を解消するために、図７（ａ）に示すように、単に、粘着剤を外縁にまで塗布すると、折曲部で粘着剤同士が重なり合ってしまい、使用する際に、図７（ｂ）に示すように展開すると、該折曲部に皺が形成される傾向がある。このような折曲部に形成される皺は、粘着剤同士が貼り付いて形成されるものであるため、一度形成されてしまうと使用時に皺が元通りに伸びて解消され難く、見栄えが悪い。そればかりでなく、使用中にこの皺が引っ掛かることにより外縁域がめくれ上がりやすいという不都合もある。 In order to solve the above-mentioned problems, as shown in FIG. 7A, if the adhesive is simply applied to the outer edge, the adhesives overlap at the bent portion, and when used, When deployed as shown in FIG. 7B, wrinkles tend to be formed in the bent portion. Since the wrinkles formed in such a bent portion are formed by sticking adhesives together, once formed, the wrinkles are stretched back to the original state during use and are not easily removed, and the appearance is poor. . In addition, there is also a disadvantage that the outer edge area is likely to be turned up by the hook being caught during use.

本発明の課題は、前述した従来技術が有する欠点を解消し得る発熱具を提供することにある。 The subject of this invention is providing the heating tool which can eliminate the fault which the prior art mentioned above has.

本発明は、第１の発熱部を収容した扁平状の第１の袋体と、第２の発熱部を収容した扁平状の第２の袋体とが、折曲部を介して連設されており、前記折曲部の位置において、前記第１の袋体と前記第２の袋体とが対向するように二つ折りされ、前記第１の袋体と前記第２の袋体は二つ折り状態の対向面に粘着剤が塗布された粘着領域を有し、且つ、前記第1の袋体と前記第２の袋体の対向面の間に１枚の両面離型シートを備え、前記第１の袋体と前記第２の袋体は対向面の粘着領域において前記１枚の両面離型シートの両面と剥離可能に粘着されている発熱具であって、前記粘着領域は、前記折曲部を跨いで存在し、前記両面離型シートは、前記折曲部に倣って折り曲げられた延出部を備える発熱具を提供するものである。 According to the present invention, a flat first bag body containing a first heat generating portion and a flat second bag body containing a second heat generating portion are connected via a bent portion. And the first bag and the second bag are folded in two so that the first bag and the second bag are opposed to each other at the bent portion. An adhesive region coated with an adhesive on the opposing surface of the state, and further comprising a double-sided release sheet between the opposing surfaces of the first bag body and the second bag body, 1 is a heating tool in which the first bag body and the second bag body are detachably adhered to both surfaces of the one double-sided release sheet in the adhesive region of the opposing surface, and the adhesive region is And the double-sided release sheet provides a heating tool including an extended portion that is bent along the bent portion.

本発明によれば、両面離型シートを用いることで離型シートの使用量を片面離型シート使用時の半分にできるとともに、折曲部に接着剤による皺が形成され難く、使用前・使用中における外縁域のめくれ上がりが起こり難い発熱具が提供される。 According to the present invention, the use amount of the release sheet can be halved by using the double-sided release sheet, and the wrinkle due to the adhesive is not easily formed at the bent portion, and before use There is provided a heating tool in which the outer edge area is not easily turned up.

図１（ａ）は、本発明の発熱具の一実施形態を示す平面図であり、図１（ｂ）は、図１（ａ）におけるＸ１−Ｘ１線断面図であり、図１（ｃ）は、図１（ａ）におけるＸ２−Ｘ２線断面図である。Fig.1 (a) is a top view which shows one Embodiment of the heating tool of this invention, FIG.1 (b) is X1-X1 sectional view taken on the line in Fig.1 (a), FIG.1 (c). FIG. 2 is a cross-sectional view taken along line X2-X2 in FIG. 図２（ａ）は、図１（ａ）に示す状態の発熱具を展開して内面側からみた平面図であり、図２（ｂ）は、図２（ａ）におけるＸ３−Ｘ３線断面図である。2A is a plan view of the heating tool in the state shown in FIG. 1A developed from the inner surface side, and FIG. 2B is a cross-sectional view taken along line X3-X3 in FIG. It is. 図３は、図１に示す発熱具における粘着剤の塗布領域を示す平面図である。FIG. 3 is a plan view showing an application region of the adhesive in the heating tool shown in FIG. 図４は、図１に示す発熱具を開く状態を示す説明図である。FIG. 4 is an explanatory view showing a state where the heating tool shown in FIG. 1 is opened. 図５（ａ）は、図１に示す発熱具の有する両面離型シートの折り状態を示す要部拡大断面図であり、図５（ｂ）は、本発明の別の実施形態の発熱具の有する両面離型シートの折り状態を示す要部拡大断面図である。FIG. 5A is an enlarged cross-sectional view of a main part showing a folded state of the double-sided release sheet of the heating tool shown in FIG. 1, and FIG. 5B is a heating tool according to another embodiment of the present invention. It is a principal part expanded sectional view which shows the folded state of the double-sided release sheet | seat which has. 図６は、本発明の発熱具に好ましく用いられる発熱体を示す一部破断斜視図である。FIG. 6 is a partially broken perspective view showing a heating element preferably used in the heating tool of the present invention. 図７は、従来の粘着発熱具の問題点を説明する図であり、図７（ａ）は、折り曲げられた状態の粘着発熱具の要部拡大断面図であり、図７（ｂ）は、図７（ａ）の粘着発熱具を展開した際の要部拡大断面図である。FIG. 7 is a diagram for explaining the problems of the conventional adhesive heating tool, FIG. 7A is an enlarged cross-sectional view of the main part of the adhesive heating tool in a folded state, and FIG. It is a principal part expanded sectional view at the time of unfolding the adhesion heating tool of Drawing 7 (a).

以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。図１（ａ）には、本発明の発熱具の一実施形態の平面図が示されている。図１（ｂ）及び（ｃ）は、図１（ａ）におけるＸ１−Ｘ１線断面図及びＸ２−Ｘ２線断面図である。図２（ａ）には、図１（ａ）に示す状態の発熱具を展開して内面側からみた平面図が示されており、図２（ｂ）は、図２（ａ）におけるＸ３−Ｘ３線断面図である。図中における「Ｙ方向」は、本実施形態の発熱具１の縦方向を示し、図中における「Ｘ方向」は、縦方向に垂直に交わる幅方向を示している。本実施形態の発熱具１は、図２に示すように、展開状態において、発熱具１をＸ方向に二等分する折曲部Ｂを軸に略左右対称に形成されている。 The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 (a) shows a plan view of an embodiment of the heating tool of the present invention. FIGS. 1B and 1C are a sectional view taken along line X1-X1 and a sectional view taken along line X2-X2 in FIG. FIG. 2 (a) shows a plan view of the heating tool in the state shown in FIG. 1 (a) as seen from the inner surface side. FIG. It is X3 sectional view taken on the line. The “Y direction” in the figure indicates the vertical direction of the heating tool 1 of the present embodiment, and the “X direction” in the figure indicates the width direction perpendicular to the vertical direction. As shown in FIG. 2, the heating tool 1 of the present embodiment is formed substantially symmetrically about a bent portion B that bisects the heating tool 1 in the X direction in the deployed state.

本実施形態の発熱具１は、図１及び図２に示すように、第１の発熱部２１ａを収容した扁平状の第１の袋体１ａと、第２の発熱部２１ｂを収容した扁平状の第２の袋体１ｂとが、折曲部Ｂを介して連設されている。なお、折曲部Ｂは、第１の袋体１ａと第２の袋体１ｂの一部分であり、独立した部位ではない。本実施形態の発熱具１は、図２（ａ），図２（ｂ）に示すように、展開状態において、扁平状の第１の袋体１ａ及び扁平状の第２の袋体１ｂがＸ方向に並列配置されてなるものである。第１の袋体１ａと、第２の袋体１ｂとは、それらの角部を除き、略矩形状であって、互いに略同形になっている。 As shown in FIGS. 1 and 2, the heating tool 1 of the present embodiment has a flat first bag 1 a that houses the first heat generating portion 21 a and a flat shape that houses the second heat generating portion 21 b. The second bag body 1b is continuously provided via the bent portion B. In addition, the bending part B is a part of the 1st bag body 1a and the 2nd bag body 1b, and is not an independent site | part. As shown in FIGS. 2 (a) and 2 (b), the heating tool 1 of the present embodiment has a flat first bag body 1a and a flat second bag body 1b in the deployed state. They are arranged in parallel in the direction. The 1st bag body 1a and the 2nd bag body 1b are substantially rectangular shapes except those corners, and are mutually substantially the same shape.

第１の袋体１ａは、図１及び図２に示すように、第１のシート２ａ及び第２のシート３ａを備えている。２枚のシート２ａ，３ａは略同形である。両シート２ａ，３ａの間には、後述する図６に示す第１の発熱部２１ａを内包する第１の発熱体２０ａが配置されている。２枚のシート２ａ，３ａは、第１の発熱体２０ａよりも大きな寸法となっており、第１の発熱体２０ａの外周縁から外方に延出した領域において互いに接合されている。この接合によって、第１の発熱部２１ａを内包する第１の発熱体２０ａを収容する扁平状の第１の袋体１ａが、両シート２ａ，３ａによって略矩形状に形成されている。この接合は、例えば、ホットメルト型粘着剤、ヒートシール、超音波シール等の方法を単独または組合せて形成されている。このように形成されることによって、図２（ａ）に示すように、両シート２ａ，３ａには、第１の発熱部２１ａの外周縁から外方に延出した外縁延出域４ａが形成されている。なお、図３に示すように、略矩形状の第１の袋体１ａの四隅のうち、第１の発熱体２０ａよりＸ方向外方にある二つの隅部のうちの一方の隅部（本実施形態においてはＹ方向の上方側の隅部）が略三角形状に切り欠かれていても良い。このように切り欠かれているため、後述のとおり使用前に二つ折りされている発熱具１が使用に際し展開し易い。 As shown in FIGS. 1 and 2, the first bag 1a includes a first sheet 2a and a second sheet 3a. The two sheets 2a and 3a have substantially the same shape. Between both the sheets 2a and 3a, the 1st heat generating body 20a which includes the 1st heat generating part 21a shown in FIG. 6 mentioned later is arrange | positioned. The two sheets 2a and 3a have a size larger than that of the first heating element 20a and are joined to each other in a region extending outward from the outer peripheral edge of the first heating element 20a. By this joining, a flat first bag 1a that accommodates the first heating element 20a that encloses the first heating part 21a is formed in a substantially rectangular shape by both sheets 2a and 3a. This joining is formed, for example, by a method such as a hot-melt adhesive, heat sealing, or ultrasonic sealing, alone or in combination. By forming in this way, as shown in FIG. 2A, an outer edge extension region 4a extending outward from the outer peripheral edge of the first heat generating portion 21a is formed on both sheets 2a and 3a. Has been. As shown in FIG. 3, of the four corners of the substantially rectangular first bag body 1a, one of the two corners outside the first heating element 20a in the X direction (the book) In the embodiment, the upper corner in the Y direction) may be cut out in a substantially triangular shape. Since it is notched in this way, the heating tool 1 folded in half before use as described later is easy to deploy in use.

発熱部２１ａが、後述するように粉体の形態である場合には、該粉体の性状によっては、粉体の流動により第１の発熱部２１ａの外周縁が明確にならない場合がある。そのような場合には、第１の発熱体２０ａを構成する第１のシート２３ａ及び第２のシート２４ａの外周縁接合領域の内周縁を第１の発熱部２１ａの外周縁とする。以下に述べる第２の袋体１ｂについても同様である。 When the heat generating portion 21a is in the form of powder as will be described later, the outer peripheral edge of the first heat generating portion 21a may not become clear due to the flow of the powder depending on the properties of the powder. In such a case, the inner peripheral edge of the outer peripheral joint region of the first sheet 23a and the second sheet 24a constituting the first heating element 20a is set as the outer peripheral edge of the first heat generating portion 21a. The same applies to the second bag 1b described below.

第２の袋体１ｂも、図１及び図２に示すように、第１の袋体１ａと同様の構成になっている。 The 2nd bag 1b is also the structure similar to the 1st bag 1a, as shown in FIG.1 and FIG.2.

本実施形態においては、図２（ａ），図２（ｂ）に示すように、展開状態において、第１の袋体１ａにおける第１のシート２ａと、第２の袋体１ｂにおける第１のシート２ｂとがＸ方向に連続する一体の連続シートであるが、別体のものでもよい。両シート２ａ，２ｂが別体のものである場合、両シート２ａ，２ｂは、同一のものでもよく、あるいは異なるものであってもよい。同様に、本実施形態においては、図２（ａ），図２（ｂ）に示すように、展開状態において、第１の袋体１ａにおける第２のシート３ａと、第２の袋体１ｂにおける第２のシート３ｂとがＸ方向に連続する一体の連続シートであるが、別体のものでもよい。両シート３ａ，３ｂが別体のものである場合、両シート３ａ，３ｂは、同一のものでもよく、あるいは異なるものであってもよい。 In the present embodiment, as shown in FIGS. 2 (a) and 2 (b), in the unfolded state, the first sheet 2a in the first bag 1a and the first sheet 2b in the second bag 1b. The sheet 2b is an integral continuous sheet that is continuous in the X direction, but may be a separate sheet. When both sheets 2a and 2b are separate bodies, both sheets 2a and 2b may be the same or different. Similarly, in the present embodiment, as shown in FIGS. 2 (a) and 2 (b), in the unfolded state, the second sheet 3a in the first bag 1a and the second bag 1b The second sheet 3b is an integral continuous sheet that is continuous in the X direction, but may be a separate sheet. When both sheets 3a and 3b are separate bodies, both sheets 3a and 3b may be the same or different.

発熱具１は、その使用前の状態においては、図１（ａ）〜図１（ｃ）に示すように、折曲部Ｂの位置において、第１の袋体１ａと第２の袋体１ｂとが対向するように二つ折りされている。好ましくは、図１（ａ）〜図１（ｃ）に示すように、発熱具１は、第１の袋体１ａの第１のシート２ａ側の面と、第２の袋体１ｂの第１のシート２ｂ側の面とが対向するように、発熱具１のＸ方向の長さを二等分する箇所に位置する折曲部Ｂにおいて二つ折りされている。 When the heating tool 1 is in a state before use, the first bag body 1a and the second bag body 1b are located at the bent portion B as shown in FIGS. Is folded in half so that they face each other. Preferably, as shown to Fig.1 (a)-FIG.1 (c), the heating tool 1 is the 1st sheet | seat 2a side surface of the 1st bag body 1a, and the 1st of the 2nd bag body 1b. It is folded in two at the bent portion B located at a position where the length in the X direction of the heating tool 1 is divided into two equal parts so that the surface on the side of the sheet 2b faces.

発熱具１は、その使用前の状態においては、図１（ａ）〜図１（ｃ）に示すように、二つ折りされた第１の袋体１ａと第２の袋体１ｂの対向面の間に１枚の両面離型シート５を備えている。本実施形態の両面離型シート５は、図２（ａ），図２（ｂ）に示すように、展開状態において、Ｘ方向の長さと、第１の袋体１ａ及び第２の袋体１ｂそれぞれの切り欠き部とを除いて、第１の袋体１ａ又は第２の袋体１ｂと略同形になっており、略矩形状に形成されている。本実施形態の両面離型シート５はまた、そのＹ方向の長さが第１の袋体１ａのＹ方向の長さと略一致しており、そのＸ方向の長さが第１の袋体１ａのＸ方向の長さよりも長いものである。すなわち、本実施形態の両面離型シート５は、図２（ａ），図２（ｂ）に示すように、展開状態において、そのＸ方向の外方端部５２は第１の袋体１ａのＸ方向の外方端部と一致しているが、そのＸ方向の内方端部５１は第１の袋体１ａから折曲部Ｂを跨いで第２の袋体１ｂの領域に延出して配され、延出部６を有している。 As shown in FIGS. 1 (a) to 1 (c), the heating tool 1 is in a state before use and is formed on the opposing surfaces of the first bag body 1a and the second bag body 1b folded in half. One double-sided release sheet 5 is provided between them. As shown in FIGS. 2A and 2B, the double-sided release sheet 5 of the present embodiment has a length in the X direction, a first bag body 1a, and a second bag body 1b in the unfolded state. Except for the respective notches, the first bag body 1a or the second bag body 1b is substantially the same shape and is formed in a substantially rectangular shape. The double-sided release sheet 5 of the present embodiment also has a length in the Y direction that is substantially the same as the length in the Y direction of the first bag 1a, and the length in the X direction is the first bag 1a. Is longer than the length in the X direction. That is, as shown in FIGS. 2A and 2B, the double-sided release sheet 5 of the present embodiment has an outer end 52 in the X direction of the first bag 1a in the unfolded state. The inner end portion 51 in the X direction extends from the first bag body 1a to the region of the second bag body 1b across the bent portion B, although it coincides with the outer end portion in the X direction. It is arranged and has an extension part 6.

発熱具１は、Ｙ方向の長さが５０〜１５０ｍｍであり、Ｘ方向の長さが１００〜３００ｍｍであり、第１の袋体１ａ又は第２の袋体１ｂのＸ方向の長さが５０〜１５０ｍｍであることが好ましい。両面離型シート５は、図２（ａ）に示す折曲部Ｂを跨いで第１の袋体１ａから第２の袋体１ｂの領域に延出して配されている両面離型シート５の延出部６の長さＬが、製造のし易さや、使用する際に展開し易さの観点から、第２の袋体１ｂの発熱部２１ｂに到達しない長さ、すなわち２〜２０ｍｍであることが好ましく、５〜１０ｍｍであることが更に好ましい。 The heating tool 1 has a length in the Y direction of 50 to 150 mm, a length in the X direction of 100 to 300 mm, and a length in the X direction of the first bag 1a or the second bag 1b. It is preferable that it is -150mm. The double-sided release sheet 5 is a double-sided release sheet 5 that extends from the first bag body 1a to the second bag body 1b across the bent portion B shown in FIG. The length L of the extending portion 6 is a length that does not reach the heat generating portion 21b of the second bag 1b, that is, 2 to 20 mm, from the viewpoint of ease of manufacture and ease of deployment when used. It is preferably 5 to 10 mm.

両面離型シート５は、図１（ｂ），図１（ｃ）に示すように、発熱具１の折曲部Ｂに倣って折り曲げられた延出部６を両面離型シート５の内方端部５１に備え、延出部６は、折曲部Ｂ近辺、好ましくは発熱部２１ｂに到達しない長さで存在する。具体的には、両面離型シート５は、図１（ｂ），図１（ｃ）に示すように、使用前の二つ折りされた状態において、そのＸ方向の内方端部５１が折曲部Ｂを越えて延在しており、内方端部５１が、折曲部Ｂに倣って、折り曲げられて延出部６を形成している。本実施形態の両面離型シート５の延出部６は、図１（ｂ），図１（ｃ）に示すように、使用前の二つ折り状態において、両面離型シート５により包囲されて形成される折曲部Ｂに沿った細長い中空部を形成しても良い。本実施形態の両面離型シート５に包囲されて形成される延出部６による中空部の直径は、厚み方向にかさばらず、一方で十分な皺防止効果が得られるという観点から、８〜０．１ｍｍであることが好ましく、３〜１ｍｍであることが更に好ましい。尚、延出部６による中空形状の直径は、最も広い位置での測定値である。 As shown in FIGS. 1B and 1C, the double-sided release sheet 5 has an extended portion 6 bent along the bent portion B of the heating tool 1 inward of the double-sided release sheet 5. The extending portion 6 is provided in the end portion 51 and has a length that does not reach the bent portion B, preferably the heating portion 21b. Specifically, as shown in FIGS. 1B and 1C, the double-sided release sheet 5 has its inner end portion 51 in the X direction bent in a folded state before use. The inner end portion 51 extends beyond the portion B and is bent along the bent portion B to form the extended portion 6. The extending part 6 of the double-sided release sheet 5 of the present embodiment is formed by being surrounded by the double-sided release sheet 5 in a folded state before use, as shown in FIGS. 1 (b) and 1 (c). You may form the elongate hollow part along the bending part B to be performed. From the viewpoint that the diameter of the hollow portion by the extending portion 6 formed by being surrounded by the double-sided release sheet 5 of the present embodiment is not bulky in the thickness direction, and on the other hand, a sufficient wrinkle prevention effect is obtained. It is preferably 1 mm, and more preferably 3 to 1 mm. In addition, the hollow-shaped diameter by the extension part 6 is a measured value in the widest position.

第１の袋体１ａと第２の袋体１ｂは、図１（ｂ），図１（ｃ）に示すように、二つ折り状態の対向面に粘着剤が塗布された粘着領域７を有し、対向面の粘着領域７において１枚の両面離型シート５の両面と剥離可能に粘着されている。この粘着領域７は、前記折曲部Ｂを跨いで存在している。本実施形態においては、二つ折りされた状態の各袋体１ａ，１ｂの対向面の発熱部と重ならない部分全体に、すなわち第１の袋体１ａの第１のシート２ａにおける第２の袋体１ｂに対向する表面であって、第１の発熱部と重ならない部分全体に粘着剤が塗布されており、第２の袋体１ｂの第１のシート２ｂにおける第１の袋体１ａに対向する表面であって、第２の発熱部と重ならない部分全体に粘着剤が塗布されている。図３には、展開状態において、本実施形態の第１のシート２ａ，２ｂの表面における粘着剤の塗布領域である粘着領域７ａ，７ｂが示されている。図３は、図２（ａ）において、両面離型シート５を剥離した状態に対応するものである。本実施形態の粘着領域７ａは、図３に示すように、二つ折りされた発熱具１を展開し第１の袋体１ａを平面視した状態において、袋体１ａの第１のシート２ａにおける第１の発熱部２１ａの外周縁から外方に延出した外縁延出域４ａの少なくとも一部と一致する。すなわち、粘着領域７ａは、第１の発熱部２１ａ上には重ならず粘着領域が存在せず、且つ、折曲部Ｂを跨いで外縁まで粘着領域が存在する。本実施形態の粘着領域７ｂも粘着領域７ａと同様である。なお、本明細書において「粘着領域が存在せず」とは、一般的に言って、粘着剤の塗布の面積率（一定の面積中における粘着剤の塗布されている面積の割合）が１０％以下、特に５％以下であるような粘着剤の塗布態様をいう。例えば、製造条件等の変動に起因して不可避的に粘着剤が塗布されることは許容する趣旨である。 As shown in FIGS. 1B and 1C, the first bag body 1a and the second bag body 1b have a pressure-sensitive adhesive region 7 in which a pressure-sensitive adhesive is applied to the opposing surface in a folded state. In the pressure-sensitive adhesive region 7 on the opposite surface, the double-sided release sheet 5 is adhered to both surfaces so as to be peelable. The adhesive region 7 exists across the bent portion B. In the present embodiment, the second bag body in the first sheet 2a of the first bag body 1a is formed on the entire portion of the bag body 1a, 1b in the folded state, which does not overlap with the heat generating portion on the opposing surface. Adhesive is applied to the entire surface of the first sheet 2b of the second bag 1b that is opposite to the first heat generating portion, and is opposed to the first bag 1a of the second bag 1b. A pressure-sensitive adhesive is applied to the entire surface of the surface that does not overlap the second heat generating portion. FIG. 3 shows adhesive regions 7a and 7b that are adhesive application regions on the surfaces of the first sheets 2a and 2b of the present embodiment in the unfolded state. FIG. 3 corresponds to the state where the double-sided release sheet 5 is peeled off in FIG. As shown in FIG. 3, the adhesive region 7 a of the present embodiment has the first folded sheet 1 in the first sheet 2 a of the bag body 1 a in a state where the folded heating tool 1 is deployed and the first bag body 1 a is viewed in plan view. It coincides with at least a part of the outer edge extension region 4a extending outward from the outer peripheral edge of the one heat generating portion 21a. That is, the adhesive region 7a does not overlap on the first heat generating portion 21a, and there is no adhesive region, and the adhesive region exists across the bent portion B to the outer edge. The adhesive region 7b of this embodiment is the same as the adhesive region 7a. In this specification, “there is no adhesive region” generally means that the area ratio of application of the adhesive (ratio of the area where the adhesive is applied in a certain area) is 10%. Hereinafter, the application mode of the pressure-sensitive adhesive which is particularly 5% or less is mentioned. For example, it is intended to allow the adhesive to be inevitably applied due to variations in manufacturing conditions and the like.

本実施形態の発熱具１は、図３に示すように、粘着領域７ａが第１の発熱部２１ａ上には重ならず、粘着領域７ｂも第２の発熱部２１ｂ上には重ならない。その為、本実施形態の発熱具１を使用者の肌に直接貼付した場合であっても、発汗に起因する粘着剤の粘着力低下が生じ難い。また、本実施形態の発熱具１を使用者の着衣に固定して貼付した場合であっても、発熱のために必要な酸素供給が妨げられず、熱伝達も妨げられず、粘着剤組成の部分変化や熱による粘着物性変化の影響も低く抑えられる。これらの結果、本実施形態の発熱具１によれば、使用中長時間にわたって発熱具１を、使用者の肌又は着衣に安定的に固定しておくことができる。 As shown in FIG. 3, in the heating tool 1 of the present embodiment, the adhesive region 7a does not overlap the first heat generating portion 21a, and the adhesive region 7b does not overlap the second heat generating portion 21b. Therefore, even when the heating tool 1 of the present embodiment is directly attached to the user's skin, the adhesive strength of the adhesive due to sweating hardly occurs. Moreover, even when the heating tool 1 of the present embodiment is fixed to a user's clothes and pasted, oxygen supply necessary for heat generation is not hindered, heat transfer is not hindered, and the pressure sensitive adhesive composition The influence of adhesive properties changes due to partial changes or heat can be kept low. As a result, according to the heating tool 1 of the present embodiment, the heating tool 1 can be stably fixed to the user's skin or clothes for a long time during use.

発熱具１は、図１（ｂ），図１（ｃ）に示すように、二つ折りされた状態の各袋体１ａ，１ｂの対向面に粘着領域７を備え、粘着領域７によって、各袋体１ａ，１ｂと両面離型シート５とが剥離可能に粘着している。本実施形態の粘着領域７ａは、図３に示すように、展開状態において、第１の袋体１ａの第１のシート２ａの表面に、Ｘ方向及びＹ方向それぞれの両外縁にまで達するように塗布されている。従って、発熱具１の使用前に、両面離型シート５と粘着領域７とが必要以上に容易に剥離してしまうことを効果的に防止し、更に使用時に使用者の肌から容易にめくれ上がることを効果的に防止することができる。本実施形態の粘着領域７ｂも同様である。 As shown in FIG. 1B and FIG. 1C, the heating tool 1 includes an adhesive region 7 on the opposing surface of each folded bag 1a, 1b. The bodies 1a and 1b and the double-sided release sheet 5 are detachably adhered. As shown in FIG. 3, the adhesive region 7a of the present embodiment reaches the both outer edges in the X direction and the Y direction on the surface of the first sheet 2a of the first bag 1a in the unfolded state. It has been applied. Accordingly, it is possible to effectively prevent the double-sided release sheet 5 and the adhesive region 7 from being more easily peeled off than necessary before the heating tool 1 is used, and to be easily turned up from the user's skin during use. This can be effectively prevented. The same applies to the adhesive region 7b of the present embodiment.

第１の袋体１ａ中に収容される第１の発熱体２０ａについて説明する。図６には、発熱体２０ａの斜視図が一部切り欠いた状態で示されている。第１の発熱体２０ａは、発熱部２１ａ及び発熱部２１ａを収容する収容体２２ａを備えている。収容体２２ａは扁平なものであり、収容体２２ａの輪郭が発熱体２０ａの輪郭をなしている。扁平な形状を有する収容体２２ａは、第１の面２３ａ及びそれと反対側に位置する第２の面２４ａを有している。収容体２２ａは、第１の面２３ａ側のシート材と第２の面２４ａ側のシート材が、収容される第１の発熱部２１ａよりも大きな寸法となっており、第１の発熱部２１ａの外周縁から外方に延出した領域において互いに接合されることで、発熱部２１ａが収容される密閉空間が形成されたものである。なお、図示しないが、第２の袋体１ｂ中に収容される第２の発熱体２０ｂも同様の構成である。 The 1st heat generating body 20a accommodated in the 1st bag 1a is demonstrated. FIG. 6 shows a perspective view of the heating element 20a with a part cut away. The first heating element 20a includes a heating part 21a and a housing 22a that houses the heating part 21a. The container 22a is flat, and the outline of the container 22a is the outline of the heating element 20a. The container 22a having a flat shape has a first surface 23a and a second surface 24a located on the opposite side thereof. The container 22a is larger in size than the first heat generating portion 21a in which the sheet material on the first surface 23a side and the sheet material on the second surface 24a side are stored, and the first heat generating portion 21a. A sealed space in which the heat generating portion 21a is accommodated is formed by joining together in a region extending outwardly from the outer peripheral edge. In addition, although not shown in figure, the 2nd heat generating body 20b accommodated in the 2nd bag 1b is also the same structure.

本実施形態の二つ折りされた状態の発熱具１の好ましい製造方法について、以下説明する。
先ず、図２（ｂ）に示すように、Ｘ方向に連続する第１の袋体１ａを構成する第１のシート２ａと第２の袋体１ｂを構成する第１のシート２ｂとの連続シートと、Ｘ方向に連続する第１の袋体１ａを構成する第２のシート３ａと第２の袋体１ｂを構成する第２のシート３ｂとの連続シートとの間に、第１の発熱体２０ａ及び第２の発熱体２０ｂをＸ方向に間隔を空けて並置し、これら二枚の連続シートを、第１の発熱体２０ａ及び第２の発熱体２０ｂそれぞれの外周縁から外方に延出した領域にて接合することによって、第１の発熱部２０ａを収容した扁平状の第１の袋体１ａと、第２の発熱部２０ｂを収容した扁平状の第２の袋体１ｂとが、Ｘ方向に並列配置されてなる袋体の連続体を形成する。 A preferred method for manufacturing the heating tool 1 in the folded state of the present embodiment will be described below.
First, as shown in FIG. 2B, a continuous sheet of a first sheet 2a constituting the first bag body 1a continuous in the X direction and a first sheet 2b constituting the second bag body 1b. Between the second sheet 3a constituting the first bag body 1a continuous in the X direction and the continuous sheet of the second sheet 3b constituting the second bag body 1b. The 20a and the second heating element 20b are juxtaposed with an interval in the X direction, and these two continuous sheets extend outward from the outer peripheral edges of the first heating element 20a and the second heating element 20b, respectively. The flat first bag body 1a containing the first heat generating portion 20a and the flat second bag body 1b containing the second heat generating portion 20b are joined by bonding in the region. A continuous body of bags formed in parallel in the X direction is formed.

次に、図２（ｂ）に示すように、袋体の連続体である第１の袋体１ａ及び第２の袋体１ｂの連設部Ｂを跨いで外縁まで粘着剤を塗布し、粘着領域７ａ、７ｂとする。本実施形態においては、第１の袋体１ａの第１のシート２ａにおける外縁延出域４ａ（第１の発熱部２１ａと重ならない領域）に対応する位置、又は、第２の袋体１ｂの第１のシート２ａにおける外縁延出域４ｂ（第２の発熱部２１ｂと重ならない領域）に対応する位置に粘着剤を塗布し、粘着領域７ａ、７ｂとする。 Next, as shown in FIG. 2 (b), an adhesive is applied to the outer edge across the continuous portion B of the first bag body 1a and the second bag body 1b, which are continuous bodies of bags, Regions 7a and 7b are assumed. In the present embodiment, the position corresponding to the outer edge extension region 4a (the region not overlapping the first heat generating portion 21a) in the first sheet 2a of the first bag 1a, or the second bag 1b Adhesive is applied to a position corresponding to the outer edge extension region 4b (a region not overlapping the second heat generating portion 21b) in the first sheet 2a to form adhesive regions 7a and 7b.

次に、図２（ｂ）に示すように、粘着剤の塗布された第１の袋体１ａと第１の袋体１ｂの連続体上に、１枚の両面離型シート５を、折曲部Ｂ（連設部）を跨ぐように配置する。次に、配置された両面離型シート５を挟んだまま二つ折りし、折曲部Ｂに倣って折り曲がる延出部６を備える発熱具１を製造することができる。以上のような発熱具１の製造方法によれば、折り曲げ加工の精度を必要以上に上げること無く、折り目の部分に接着剤による皺が形成され難い二つ折りされた状態の発熱具１を製造することができる。 Next, as shown in FIG. 2 (b), one double-sided release sheet 5 is folded on the continuous body of the first bag body 1a and the first bag body 1b to which the adhesive is applied. It arrange | positions so that part B (continuous connection part) may be straddled. Next, the heating tool 1 including the extending portion 6 that is folded in accordance with the bent portion B by folding the double-sided release sheet 5 that is disposed between the folded portion B can be manufactured. According to the manufacturing method of the heating tool 1 as described above, the heating tool 1 in a folded state in which a wrinkle due to an adhesive is difficult to be formed at the fold portion without increasing the accuracy of the bending process more than necessary is manufactured. be able to.

尚、上記発熱具１の製造方法は、第１の袋体１ａと第１の袋体１ｂの連続体上に、粘着剤を塗布した後に両面離型シート５を配置したものを二つ折りしているが、あらかじめ両面離型シート５に粘着剤を塗布したものを第１の袋体１ａと第１の袋体１ｂの連続体上に配置してから二つ折りして発熱具１を製造してもよい。 In addition, the manufacturing method of the said heating tool 1 folds the thing which has arrange | positioned the double-sided release sheet 5 after apply | coating an adhesive on the continuous body of the 1st bag body 1a and the 1st bag body 1b. The heating tool 1 is manufactured by folding the double-sided release sheet 5 previously coated with an adhesive on the continuous body of the first bag body 1a and the first bag body 1b, and then folding it in half. Also good.

本発明の実施形態の発熱具１の形成材料について説明する。
発熱具１の有する発熱部２１は、被酸化性金属粉、反応促進剤、電解質及び水を含んでいる。発熱部２１は被酸化性金属が酸素と接触することによる酸化反応で生じた熱を利用して発熱する部位である。被酸化性金属粉、反応促進剤及び電解質の材料としては、当該技術分野において通常用いられている材料と同様のものを用いることができる。発熱部２１は、例えば発熱シートの形態又は発熱粉体の形態であり得る。 The material for forming the heating tool 1 according to the embodiment of the present invention will be described.
The heating part 21 of the heating tool 1 contains oxidizable metal powder, a reaction accelerator, an electrolyte, and water. The heat generating part 21 is a part that generates heat using heat generated by an oxidation reaction caused by contact of the oxidizable metal with oxygen. As materials for the oxidizable metal powder, the reaction accelerator, and the electrolyte, the same materials as those usually used in the technical field can be used. The heat generating part 21 may be in the form of a heat generating sheet or a heat generating powder, for example.

特に発熱部２１として、多量の水蒸気の発生を伴って発熱するものを用いることができる。そのような発熱部の構成は、例えば本出願人の先の出願に係る特許第３６９８７１５号公報に記載されている。水蒸気の発生量は、例えば０．５〜１２ｍｇ／３ｈｒ・ｃｍ²程度である。 In particular, the heat generating part 21 may be one that generates heat with the generation of a large amount of water vapor. The structure of such a heat generating part is described in, for example, Japanese Patent No. 3698715 related to the earlier application of the present applicant. The amount of water vapor generated is, for example, about 0.5 to 12 mg / 3 hr · cm ² .

発熱体２０における第１のシート２３及び第２のシート２４を構成するシート材の材料としては、少なくとも一部に通気性を有し、かつ上述の被酸化性金属粉等の脱落がないものが好適に用いられる。そのような材料としては、例えば微細孔を多数有する透湿性フィルムやスパンボンド不織布（Ｓ）とメルトブローン不織布（Ｍ）を複合化したＳＭＳ不織布やＳＭＭＳ不織布等の繊維材料等が挙げられる。 The material of the sheet material constituting the first sheet 23 and the second sheet 24 in the heating element 20 is one that has at least a part of air permeability and does not drop off the above-described oxidizable metal powder or the like. Preferably used. Examples of such a material include a moisture permeable film having a large number of fine holes, and a fiber material such as an SMS nonwoven fabric or a SMMS nonwoven fabric obtained by combining a spunbond nonwoven fabric (S) and a meltblown nonwoven fabric (M).

発熱体２０を収容する袋体１を構成する第１のシート２及び第２のシート３としては、少なくとも一部に通気性を有する材料が用いられる。また、発熱具１を使用者の肌に直接貼付する場合には、風合いが良好であることが有利である。これらの観点から、各シートとしては、例えば不織布等を用いることができる。 As the 1st sheet 2 and the 2nd sheet 3 which constitute bag 1 which stores exothermic body 20, the material which has air permeability is used at least in part. Moreover, when sticking the heating tool 1 directly on a user's skin, it is advantageous that a texture is favorable. From these viewpoints, for example, a nonwoven fabric or the like can be used as each sheet.

粘着剤としては、当該技術分野において用いられるものを用いることができ、例えば従来公知の天然または合成ゴム系、（メタ）アクリル酸エステル系、シリコーン系ウレタン系などの粘着剤が選定される。さらに、本発明の効果を損なわない範囲内で、一般の粘着剤に添加されている、粘着付与剤、軟化剤、無機充填剤、老化防止剤、紫外線吸収剤、顔料等が添加されても良い。粘着力を変える方法としては、粘着剤の塗布量を変化させたり、粘着剤中の軟化剤の割合を変化させるなどが挙げられる。接着剤７の塗布量は、剥がれ難さと剥がし易さ、ならびに皺になり難さの観点から、３０ｇ／ｍ²〜３００ｇ／ｍ²であることが好ましい。 As an adhesive, what is used in the said technical field can be used, for example, conventionally well-known natural or synthetic rubber type, (meth) acrylic acid ester type, silicone type urethane type adhesives etc. are selected. Furthermore, a tackifier, a softener, an inorganic filler, an anti-aging agent, an ultraviolet absorber, a pigment, and the like that are added to a general pressure-sensitive adhesive may be added within a range that does not impair the effects of the present invention. . Examples of the method for changing the adhesive force include changing the amount of the adhesive applied and changing the ratio of the softening agent in the adhesive. The coating amount of the adhesive 7, peeling difficulty and peeling ease, and from the viewpoint of it difficulty to wrinkle, it is preferred that ^{^{30g / m 2 ~300g / m 2}} .

粘着剤の塗布するパターンとしては、例えば散点状のドットパターンが挙げられる。また、スパイラル状のパターンや、一方向に延びるストライプ状のパターンを用いることもできる。特に散点状のドットパターンやストライプ状のパターンを用いると、袋体１ａ，１ｂと使用者の肌との間に、空気の流通チャネルが形成されやすいので、肌から生ずる汗の放散を効果的に行うことができ、粘着力の低下を効果的に防止することができる。このことは、特に、発熱部２１が、水蒸気の発生を伴って発熱するものである場合に一層顕著となる。 Examples of the pattern to which the adhesive is applied include a dotted dot pattern. A spiral pattern or a stripe pattern extending in one direction can also be used. In particular, when a dotted dot pattern or a stripe pattern is used, an air circulation channel is easily formed between the bags 1a and 1b and the user's skin, so that it is effective to dissipate sweat generated from the skin. It is possible to effectively prevent a decrease in adhesive strength. This becomes more prominent particularly when the heat generating portion 21 generates heat accompanied by the generation of water vapor.

両面離型シート５としては、紙やフィルム等の基材シートの各面に、付加反応型や縮合反応型などの熱硬化性シリコーンの他に、紫外線照射（ＵＶ）法や電子線照射（ＥＢ）法によるシリコーン処理等の離型処理が施されているものを用いることができる。好ましくは、グラシン紙、クラフト紙、上質紙などの紙や、ポリエチレン、ポリプロピレン、ポリエステル、ポリウレタン等の合成樹脂フィルム及びその積層フィルムの表面に長鎖アルキル系離型剤、シリコーン系離型剤等の離型剤を塗布したものなどが挙げられる。特に、剥離後の離型シートの扱い易さの観点から、２０ｇ／ｍ²〜６０ｇ／ｍ²の紙（上質紙）が好ましく、剥離時の音の少なさや剥離の容易性（柔軟な変形性）の観点から、２０ｇ／ｍ²〜５５ｇ／ｍ²のポリエチレンフィルムを使用することが好ましい。 As the double-sided release sheet 5, an ultraviolet irradiation (UV) method or electron beam irradiation (EB) is used on each surface of a base sheet such as paper or film, in addition to thermosetting silicone such as addition reaction type and condensation reaction type. ), Which has been subjected to a release treatment such as silicone treatment. Preferably, the surface of glassine paper, kraft paper, high-quality paper, synthetic resin films such as polyethylene, polypropylene, polyester, polyurethane and the like, and long-chain alkyl release agents, silicone release agents, etc. The thing etc. which apply | coated the mold release agent are mentioned. In particular, from the viewpoint of easy handling of the release sheet after ^{peeling, 20g / m 2 ~60g / m} 2 paper (wood free paper) is preferred, lack or peel of the ease of sound during peeling (flexible deformability from the viewpoint of), it is preferable to use a polyethylene film of ^{^{20g / m 2 ~55g / m 2}} .

上述したように、二つ折りされた状態の発熱具１は、図１（ｂ），図１（ｃ）に示すように、第１の袋体１ａ上の粘着領域７ａによって両面離型シート５の一面５ａと剥離可能に粘着されており、第２の袋体１ｂ上の粘着領域７ｂによって両面離型シート５の他面５ｂと剥離可能に粘着されている。第１の袋体１ａ上の粘着領域７ａと両面離型シート５の一面５ａとの間の剥離力、又は第２の袋体１ｂ上の粘着領域７ｂと両面離型シート５の他面５ｂとの間の剥離力は、１〜１７０ｃＮであることが好ましく、２〜６０ｃＮであることが更に好ましい。また、第１の袋体１ａ上の粘着領域７ａと両面離型シート５の一面５ａとの間の剥離力と、第２の袋体１ｂ上の粘着領域７ｂと両面離型シート５の他面５ｂとの間の剥離力とを異なるようにすることもできる。 As described above, the heating tool 1 in a folded state is formed on the double-sided release sheet 5 by the adhesive region 7a on the first bag 1a as shown in FIGS. 1 (b) and 1 (c). It is adhered to the one surface 5a so as to be peelable, and is adhered to the other surface 5b of the double-sided release sheet 5 so as to be peelable by an adhesive region 7b on the second bag body 1b. The peeling force between the adhesive region 7a on the first bag 1a and the one surface 5a of the double-sided release sheet 5, or the adhesive region 7b on the second bag 1b and the other surface 5b of the double-sided release sheet 5 Is preferably 1 to 170 cN, and more preferably 2 to 60 cN. Further, the peeling force between the adhesive region 7a on the first bag 1a and the one surface 5a of the double-sided release sheet 5, and the other surface of the adhesive region 7b and the double-sided release sheet 5 on the second bag 1b. It is also possible to make the peel force between 5b different.

剥離力の測定は、エー・アンド・デイ株式会社（オリエンテック（株））のＲＴＣ−１２１０及び汎用試験機用データ処理システムを使用し、Ｔ−剥離法にて行う。測定は、ロードセルＵＬＺ−５Ｌ−Ａ（５ｋｇｆ）、チャック間１０ｍｍ、剥離速度３００ｍｍ／分で行う。１回の測定は、上位５ヶ所のピーク値の平均を算出することで得る。３サンプルの測定を行い、３測定の平均値を剥離力とする。 The peel force is measured by the T-peel method using RTC-1210 of A & D Corporation (Orientec Co., Ltd.) and a data processing system for a general purpose tester. The measurement is performed with a load cell ULZ-5L-A (5 kgf), a chuck interval of 10 mm, and a peeling speed of 300 mm / min. One measurement is obtained by calculating the average of the peak values at the top five locations. Three samples are measured, and the average of the three measurements is taken as the peel force.

次に上述した本発明の実施形態の発熱具１を使用した際の作用効果について説明する。
本実施形態の発熱具１は、図１（ａ）に示すように、使用前の二つ折りされた状態において、両面離型シート５に発熱具１の折曲部Ｂに倣って折り曲がる延出部６が形成されているので、折曲部Ｂに粘着剤による所謂糊溜まりができ難く、その為、接着剤による皺が形成され難く、使用前・使用中における外縁域のめくれ上がりが起こり難い。また、本実施形態の発熱具１は、図４に示すように、図１（ａ）に示す使用前の二つ折り状態の発熱具１の角部から、例えば、一方の手で両面離型シート５及び第２の袋体１ｂを把持し、他方の手で第１の袋体１ａを把持して第１の袋体１ａを捲ることで、第１の袋体１ａから両面離型シート５の一面５ａを剥離する。次に、他方の手で第１の袋体１ａを把持したまま、一方の手で折曲部Ｂにある両面離型シート５の延出部６を把持し、両面離型シート５を捲ることで、容易に図３に示す状態となるように開くことができる。また更に、本実施形態の発熱具１は、両面離型シート５を用いることで離型シートの使用量を片面離型シートの略半分とすることができる。 Next, the effect at the time of using the heating tool 1 of embodiment of this invention mentioned above is demonstrated.
As shown in FIG. 1A, the heating tool 1 of the present embodiment extends in a state in which the double-sided release sheet 5 is folded along the bent portion B of the heating tool 1 in a folded state before use. Since the portion 6 is formed, it is difficult to form a so-called glue reservoir with the adhesive at the bent portion B, and therefore it is difficult to form wrinkles due to the adhesive, and it is difficult for the outer edge region to turn up before and during use. . Further, as shown in FIG. 4, the heating tool 1 of the present embodiment is, for example, a double-sided release sheet with one hand from the corner of the heating tool 1 in a folded state before use shown in FIG. 5 and the second bag body 1b, the first bag body 1a is gripped with the other hand and the first bag body 1a is wound, so that the double-sided release sheet 5 is removed from the first bag body 1a. The one surface 5a is peeled off. Next, while holding the first bag body 1a with the other hand, the extension part 6 of the double-sided release sheet 5 in the bent part B is held with one hand, and the double-sided release sheet 5 is rolled up. Thus, it can be easily opened to the state shown in FIG. Furthermore, the heating tool 1 of this embodiment can use the double-sided release sheet 5 so that the amount of the release sheet used is substantially half that of the single-sided release sheet.

特に、本実施形態の発熱具１は、図１（ａ）に示すように、使用前の二つ折りされた状態において、両面離型シート５の延出部６が発熱具の折曲部Ｂに倣って細長い中空形状に折り曲げられていると、接着剤による皺が更に形成され難い。 In particular, as shown in FIG. 1A, the heating tool 1 of the present embodiment has an extended portion 6 of the double-sided release sheet 5 as a bent portion B of the heating tool in a folded state before use. If the sheet is bent into an elongated hollow shape, the wrinkles due to the adhesive are not easily formed.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は実施形態に制限されない。
例えば、上述した発熱具１においては、図３に示すように、粘着領域７ａ，７ｂは、各袋体１ａ，１ｂを平面視して、袋体１ａ，１ｂそれぞれにおける第１発熱部２１ａ，第２発熱部２１ｂと重なる位置には存在しなかったが、別の実施の形態としては、これに代えて、袋体１ａ，１ｂの一方又は両方において、発熱部２１ａ，２１ｂと重なる位置に粘着領域７ａ，７ｂが存在してもよい。 As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment.
For example, in the heating tool 1 described above, as shown in FIG. 3, the adhesive regions 7 a and 7 b have the first heating portions 21 a and 21 b in the bag bodies 1 a and 1 b, respectively, in plan view of the bag bodies 1 a and 1 b. 2 Although it did not exist in the position which overlaps with the heat-emitting part 21b, it replaces with this as another embodiment, and instead of this, in one or both of the bag bodies 1a and 1b, the adhesive region is located at the position overlapping with the heat-generating parts 21a and 21b. 7a and 7b may exist.

また、上述した発熱具１においては、図３に示すように、各袋体１ａ，１ｂがいずれも略矩形のものであったが、各袋体１ａ，１ｂはこの形状に限られない。 Moreover, in the heating tool 1 mentioned above, as shown in FIG. 3, each bag 1a, 1b was a substantially rectangular thing, However, Each bag 1a, 1b is not restricted to this shape.

１発熱具
１ａ第１の袋体
１ｂ第２の袋体
２ａ，２ｂ第１のシート
３ａ，３ｂ第２のシート
４ａ，４ｂ外縁延出域
５両面離型シート
５１内方端部
５２外方端部
５ａ両面離型シートの一面
５ｂ両面離型シートの他面
６延出部
７粘着領域
７ａ第１の袋体側の粘着領域
７ｂ第２の袋体側の粘着領域
２０ａ第１の発熱体
２０ｂ第２の発熱体
２１ａ第１の発熱部
２１ｂ第２の発熱部
Ｂ折曲部 DESCRIPTION OF SYMBOLS 1 Heating tool 1a 1st bag body 1b 2nd bag body 2a, 2b 1st sheet 3a, 3b 2nd sheet 4a, 4b Outer edge extension area 5 Double-sided release sheet 51 Inner edge part 52 Outer edge Part 5a One side of double-sided release sheet 5b Other side of double-sided release sheet 6 Extension part 7 Adhesive area 7a Adhesive area on first bag side 7b Adhesive area 20a on second bag side First heating element 20b Second Heating element 21a first heating part 21b second heating part B bent part

Claims

A flat first bag body containing the first heat generating part and a flat second bag body containing the second heat generating part are continuously provided via the bent part,
In the position of the bent portion, the first bag body and the second bag body are folded in two so as to face each other,
The first bag body and the second bag body have an adhesive region in which an adhesive is applied to the opposing surface in a folded state, and the first bag body and the second bag body are opposed to each other. With one double-sided release sheet between the faces,
The first bag body and the second bag body are heating tools that are detachably adhered to both surfaces of the one double-sided release sheet in the adhesive region of the opposing surface,
The adhesive region exists across the bent portion,
In a state in which the heating tool folded in half is expanded and viewed in plan, one of the four corners of the first bag body that is outside in the width direction has a substantially triangular shape. Of the four corners of the second bag body, the other corner of the two corners on the outer side in the width direction is cut out in a substantially triangular shape,
The double-sided release sheet is formed in substantially the same shape as the first bag body or the second bag body except for the cutout portions of the first bag body and the second bag body, A heating tool provided with an extending part that is bent following the bent part.

The adhesive area in a plan view in Expand a two-folded the heating tool, in the first heating portion and the outer edge extending Deiki extending from an outer peripheral edge to the outside of the second heating portion The heating tool according to claim 1, wherein the heating tool is present in a region that does not overlap the first heat generating portion and the second heat generating portion .

The heating tool according to claim 1 or 2, wherein the extension part has a length that does not reach the heating part.