本発明者は、これらの課題を解決すべく鋭意研究を重ねた結果、本発明に到達した。
即ち、本発明の発熱体の製造方法は、請求項１に記載の通り、 鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０．５〜８０の含余剰水発熱組成物を含有する発熱部を備えた発熱前駆体を、透湿度が０．１〜６．０ｇ／（ｍ２・ｄａｙ）である包材から構成される外袋に封入後、損傷を受けない自然環境下、及び、保持温度が１〜８０℃の制御環境下から選ばれた一種の環境下に保持し、該保持期間を、２５時間〜２年間とすることにより、余剰水値が０、且つ、立ち上り昇温速度が１２℃／５分以上である含水発熱組成物を有する発熱体に変換することを特徴とする.
また、請求項２に記載の発熱体の製造方法は、請求項１に記載の発熱体の製造方法において、 前記鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０．５〜８０の含余剰水発熱組成物を含有する発熱部を備えた発熱前駆体を、透湿度が０．１〜６．０ｇ／（ｍ２・ｄａｙ）、且つ、酸素透過度が０．０５〜１０ ｍ１ ／（ｍ２・ｄａｙ）である包材から構成される外袋に封入後、損傷を受けない自然環境下、及び、保持温度が１〜８０℃の制御環境下から選ばれた一種の環境下に保持し、該保持期間を、２５時間〜２年間とすることにより、余剰水値が０、且つ、立ち上り昇温速度が１２℃／５分以上である含水発熱組成物を有する発熱体に変換することを特徴とする。
また、請求項３に記載の発熱体の製造方法は、請求項１に記載の発熱体の製造方法において、 前記鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０．５〜８０の含余剰水発熱組成物を型成形により成形した発熱組成物成形体を含有する発熱部を備えた発熱前駆体を、透湿度が０．１〜６．０ｇ／（ｍ２・ｄａｙ）である包材から構成される外袋に封入後、損傷を受けない自然環境下、及び、保持温度が１〜８０℃且つ保持湿度１〜９０％の制御環境下から選ばれた一種の環境下に保持し、該保持期間を、２５時間〜２年間とすることにより、余剰水値が０、且つ、立ち上り昇温速度が４０℃／５分以上である含水発熱組成物を有する発熱体に変換することを特徴とする。
また、本発明の発熱体は、請求項４に記載の通り、 請求項１又は２に記載の発熱体の製造方法により製造され、鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０、且つ、立ち上がり昇温速度が１２℃／５分以上である含水発熱組成物を有することを特徴とする。
また、請求項５に記載の発熱体は、請求項４に記載の発熱体において、 請求項１又は２に記載の発熱体の製造方法により製造され、鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０であり、且つ、立ち上がり昇温速度が１２℃／５分以上である含水発熱組成物及び複数の区分発熱部領域と区分け部が一体化され、少なくとも一部は通気性を有する収納体を備え、該含水発熱組成物が収納された区分発熱部領域である区分発熱部と発熱組成物の非収納領域である区分け部が一体化され、複数の区分発熱部が区分け部を間隔として、間隔をおいて設けられ、少なくとも一部は通気性を有し、該収納体の区分発熱部領域と区分け部を横切る長手方向の少なくともーつのループスティフネスが７００ｍＮ／ｃｍ以下であり、構造的柔軟機能と関節的柔軟機能とに基づく柔軟性を有することを特徴とする。
また、請求項６に記載の発熱体は、請求項４に記載の発熱体において、 前記発熱体が単一発熱部発熱体、矩形発熱体、温灸発熱体、足温発熱体から選択された少なくとも一種であり、各発熱体は、少なくとも一部に通気性を有し、且つ、該含水発熱組成物が鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０であり、且つ、立ち上がり昇温速度が１２℃／５分以上であることを特徴とする。
また、請求項７に記載の発熱体は、請求項６に記載の発熱体において、 前記足温発熱体が、間欠的な切り込みを有せず、全足形であり、その最小剛軟度が２００ｍｍ以上であることを特徴とする。
また、請求項８に記載の発熱体は、請求項５に記載の発熱体において、 前記発熱体が、区分発熱部発熱体、剛軟発熱体、ストライプ発熱体、切り離し自在発熱体、伸縮発熱体、バンド発熱体、トンネル通気発熱体、薬剤発熱体、切り離し自在トンネル通気発熱体、切り離し自在薬剤発熱体、目温発熱体、顔温発熱体（鼻温発熱体）、外袋付き外仮着折り畳み発熱体から選択された少なくとも一種であり、含水発熱組成物及び複数の区分発熱部領域と区分け部が一体化され、少なくとも一部は通気性を有する収納体を備え、該含水発熱組成物が収納された区分発熱部領域である区分発熱部と発熱組成物の非収納領域である区分け部が一体化され、複数の区分発熱部が区分け部を間隔として、間隔をおいて設けられ、各少なくとも一部は通気性を有する発熱体の含水発熱組成物が鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０であり、且つ、立ち上がり昇温速度が１２℃／５分以上であり、各発熱体の収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であり、且つ、少なくとも一つの前記区分け部の、２５℃における最大引張強度が２０ｇ／ｍｍ幅以上であり、２５℃における破断伸びが５％以上であり、発熱体の最小剛軟度が７０ｍｍ以下であり、最小剛軟度変化が−９５〜０である、構造的柔軟機能と関節的柔軟機能とに基づく柔軟性を有することを特徴とする。
また、本発明の発熱体は、請求項９に記載の通り、 請求項３に記載の発熱体の製造方法により製造され、鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０、且つ、立ち上がり昇温速度が４０℃／５分以上である含水発熱組成物を有することを特徴とする。
また、請求項１０に記載の発熱体は、請求項９に記載の発熱体において、 鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０であり、且つ、立ち上がり昇温速度が４０℃／５分以上である含水発熱組成物及び複数の区分発熱部領域と区分け部が一体化され、少なくとも一部は通気性を有する収納体を備え、該含水発熱組成物が収納された区分発熱部領域である区分発熱部と発熱組成物の非収納領域である区分け部が一体化され、複数の区分発熱部が区分け部を間隔として、間隔をおいて設けられ、少なくとも一部は通気性を有し、該収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であり、且つ、発熱体の最小剛軟度が７０ｍｍ以下であり、最小剛軟度変化が−９５〜０である、構造的柔軟機能と関節的柔軟機能とに基づく柔軟性を有することを特徴とする。
また、請求項１１に記載の発熱体は、請求項４乃至１０の何れかに記載の発熱体において、 前記鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０である含水発熱組成物を有する発熱体が透湿度が０．１〜６．０ｇ／（ｍ ２ ・ｄａｙ）である包材から構成される外袋に封入されていることを特徴とする。
また、上記発熱体の製造方法において、前記鉄粉、炭素成分、反応促進剤、水を必須成分とし、余剰水値が０．５〜８０の含余剰水発熱組成物を型成形により成形した発熱組成物成形体を含有する発熱部を備えた発熱前駆体を、透湿度が０．１〜６．０ｇ／（ｍ ２ ・ｄａｙ）、且つ、酸素透過度が０．０５〜１０ｍ１ ／（ｍ ２ ・ｄａｙ）である包材から構成される外袋に封入後、損傷を受けない自然環境下、及び、保持温度が１〜８０℃且つ保持湿度１〜９０％の制御環境下から選ばれた一種の環境下に保持される保持期間を、２５時間〜２年間とすることにより、余剰水値が０、且つ、立ち上り昇温速度が４０℃／５分以上である含水発熱組成物を有する発熱体に変換することが好ましい。
また、上記発熱体において、前記収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であり、且つ、少なくとも一つの前記区分け部の、２５℃における最大引張強度が２０ｇ／ｍｍ幅以上であり、２５℃における破断伸びが５％以上であり、構造的柔軟機能と関節的柔軟機能とに基づく柔軟性を有することが好ましい。
また、上記発熱体において、前記収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であり、且つ、前記区分け部の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であることが好ましい。
また、上記発熱体において、前記収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下である発熱体の少なくとも１個の区分け部に間欠的な切り込みが設けられたことが好ましい。
また、上記発熱体において、前記収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下である発熱体の各区分発熱部の少なくとも一部が局所通気材で覆われ、区分発熱部の通気側と区分け部と局所通気材により囲まれた空間部を有し、少なくとも区分発熱部の空間部に面した側面通気部より発熱組成物への通気が行われることが好ましい。
また、上記発熱体において、前記収納体の区分発熱部領域と区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であり、且つ、発熱体の最小剛軟度が７０ｍｍ以下であり、最小剛軟度変化が−９５〜０であることが好ましい。 また、上記発熱体において、発熱終丁後の発熱体を構成する収納体の区分発熱部領域とシール領域である区分け部を横切る長手方向の少なくとも一つのループスティフネスが７００ｍＮ／ｃｍ以下であることが好ましい。
As a result of intensive studies to solve these problems, the present inventor has reached the present invention.
That is, the method for producing a heating element according to the present invention comprises, as described in claim 1, iron powder, a carbon component, a reaction accelerator, water as essential components, and a surplus water value of 0.5 to 80. The heat-generating precursor including the heat-generating part containing the composition is not damaged after being enclosed in an outer bag composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m 2 · day). By holding in a natural environment and a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C., and setting the holding period to 25 hours to 2 years, the surplus water value is 0, And, it is characterized in that it is converted into a heating element having a hydrous exothermic composition whose rising temperature rising rate is 12 ° C / 5 minutes or more.
Moreover, the manufacturing method of the heating element according to claim 2 is the manufacturing method of the heating element according to claim 1, wherein the iron powder, the carbon component, the reaction accelerator, and water are essential components, and the surplus water value is 0. The exothermic precursor having an exothermic part containing 5 to 80 of the surplus water exothermic composition has a moisture permeability of 0.1 to 6.0 g / (m 2 · day) and an oxygen permeability of 0.00. After being enclosed in an outer bag composed of a packaging material of 05-10 m1 / (m 2 · day), it was selected from a natural environment that is not damaged and a controlled environment where the holding temperature is 1 to 80 ° C. By holding it under a kind of environment, and having the holding period of 25 hours to 2 years, it has a hydrous exothermic composition with an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more. It is characterized by being converted into a heating element.
Moreover, the manufacturing method of the heat generating body of Claim 3 WHEREIN: The manufacturing method of the heat generating body of Claim 1 WHEREIN: The said iron powder, a carbon component, a reaction accelerator, and water are essential components, and an excess water value is 0. The exothermic precursor provided with the exothermic part containing the exothermic composition molded body obtained by molding the surplus water-containing exothermic composition of 5 to 80 by molding, has a moisture permeability of 0.1 to 6.0 g / (m 2 · day) after being enclosed in an outer bag composed of a packaging material, which is a kind selected from a natural environment that is not damaged and a controlled environment in which the holding temperature is 1 to 80 ° C. and the holding humidity is 1 to 90%. Heating element having a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or more by maintaining in an environment and maintaining the holding period for 25 hours to 2 years It is characterized by converting into.
Moreover, the heating element of the present invention is manufactured by the method for manufacturing a heating element according to claim 1 or 2, as described in claim 4, and iron powder, a carbon component, a reaction accelerator, and water as essential components, It has a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more.
Moreover, the heating element according to claim 5 is the heating element according to claim 4, which is manufactured by the method for manufacturing a heating element according to claim 1, wherein iron powder, carbon component, reaction accelerator, water Is an essential component, the excess water value is 0, and the rising heat-up rate is 12 ° C./5 minutes or more, and the plurality of divided heat generating region and the divided portion are integrated at least partially. Is provided with an air-permeable storage body, and a segmental heat generating part that is a segmental heat generating part region in which the hydrous heat generating composition is stored and a segmental part that is a non-contained region of the exothermic composition are integrated, and a plurality of segmental heat generating units However, at least a part of the container has air permeability, and at least one loop stiffness in the longitudinal direction across the section heating section region and the section is 700 mN / cm or less. And structurally flexible Characterized in that it has the flexibility based on the performance and the joint manner flexible features.
The heating element according to claim 6 is the heating element according to claim 4, wherein the heating element is at least selected from a single heating element heating element, a rectangular heating element, a warm heating element, and a foot heating element. Each heating element is at least partially breathable, and the water-containing heating composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, and the surplus water value is 0. And the rising temperature rising rate is 12 ° C./5 minutes or more.
Further, the heating element according to claim 7 is the heating element according to claim 6, wherein the foot temperature heating element does not have intermittent cuts and has a full foot shape, and its minimum bending resistance is 200 mm. It is the above.
Further, the heating element according to claim 8 is the heating element according to claim 5, wherein the heating element is a segment heating part heating element, a rigid soft heating element, a stripe heating element, a detachable heating element, or a telescopic heating element. , Band heating element, tunnel ventilation heating element, drug heating element, detachable tunnel ventilation heating element, detachable drug heating element, eye temperature heating element, face temperature heating element (nasal temperature heating element), outer temporary folding with outer bag It is at least one selected from a heating element, a water-containing heat generating composition, a plurality of section heat-generating part regions and a section are integrated, and at least a part thereof is provided with a breathable storage body, and the water-containing heat-generating composition is stored The divided heat generating portion, which is the divided heat generating portion area, and the dividing portion, which is a non-storage region of the exothermic composition, are integrated, and a plurality of divided heat generating portions are provided at intervals with the dividing portion as an interval. The part is breathable The hydrous exothermic composition of the heating element has iron powder, carbon component, reaction accelerator, water as essential components, the surplus water value is 0, and the rising temperature rise rate is 12 ° C./5 minutes or more, At least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the heating element storage body is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of at least one section is 20 g / Structural flexibility function and joints with a width of mm or more, a breaking elongation at 25 ° C. of 5% or more, a minimum bending resistance of the heating element of 70 mm or less, and a minimum bending resistance change of −95 to 0 It is characterized by having flexibility based on the functional flexibility function.
Moreover, the heat generating body of this invention is manufactured by the manufacturing method of the heat generating body of Claim 3 as described in Claim 9, and uses iron powder, a carbon component, a reaction accelerator, water as an essential component, and excess water. It has a hydrous exothermic composition having a value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or more.
The heating element according to claim 10 is the heating element according to claim 9, wherein iron powder, a carbon component, a reaction accelerator, and water are essential components, the surplus water value is 0, and the rising temperature rises. A hydrous exothermic composition having a temperature rate of 40 ° C./5 min or more and a plurality of segmented exothermic part regions and a segmented part are integrated, and at least a part thereof is provided with a breathable housing, and the hydrous exothermic composition is accommodated. The segmented heat generating part, which is the segmented heat generating part region, and the segmented part, which is a non-contained area of the exothermic composition, are integrated, and a plurality of segmented heat generating parts are provided with an interval between the segmented parts. Has air permeability, at least one loop stiffness in the longitudinal direction crossing the sectioned heat generating area and the section of the storage body is 700 mN / cm or less, and the heating element has a minimum bending resistance of 70 mm or less. The minimum bending resistance change is It is characterized by having a flexibility based on a structural flexible function and an articulated flexible function that is −95 to 0.
The heating element according to claim 11 is the heating element according to any one of claims 4 to 10, wherein the iron powder, carbon component, reaction accelerator, and water are essential components, and the surplus water value is 0. A heating element having a certain hydrous heating composition is enclosed in an outer bag made of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m 2 · day).
Further, in the method for producing a heating element, the iron powder, the carbon component, the reaction accelerator, and water are essential components, and an exothermic water-containing composition having an excess water value of 0.5 to 80 is molded by molding. The exothermic precursor provided with the exothermic part containing the composition molded body has a moisture permeability of 0.1 to 6.0 g / (m 2 · day) and an oxygen permeability of 0.05 to 10 m 1 / (m 2. ・ Day) a kind selected from a natural environment that is not damaged after being enclosed in an outer bag composed of a packaging material, and a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 1 to 90%. A heating element having a hydrous heat generating composition having a surplus water value of 0 and a rising temperature rising rate of 40 ° C./5 minutes or more by setting the holding period to be maintained in the environment of 25 hours to 2 years It is preferable to convert to
Further, in the heating element, at least one loop stiffness in a longitudinal direction crossing the section heating section region and the section section of the storage body is 700 mN / cm or less, and at least one section section has a maximum at 25 ° C. It is preferable that the tensile strength is 20 g / mm width or more, the elongation at break at 25 ° C. is 5% or more, and has flexibility based on the structural flexibility function and the joint flexibility function.
Further, in the heating element, at least one loop stiffness in a longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less, and at least one loop stiffness of the section is 700 mN / cm. It is preferable that it is cm or less.
Further, in the heating element, intermittent cuts are made in at least one section of the heating element in which at least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less. It is preferably provided.
Further, in the above heating element, at least a part of each section heating portion of the heating element having at least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less is a local ventilation material And a space part surrounded by the ventilation side of the segmental heat generating part, the segmented part and the local ventilation material, and at least the side ventilation part facing the space part of the segmented heat generating part is ventilated to the heat generating composition. It is preferable.
Further, in the heating element, at least one loop stiffness in the longitudinal direction crossing the sectioned heat generating region and the section of the storage body is 700 mN / cm or less, and the minimum bending resistance of the heating element is 70 mm or less. The minimum bending resistance change is preferably -95 to 0. Further, in the heating element, at least one loop stiffness in the longitudinal direction crossing the divided heating portion region of the storage body constituting the heating member after the end of heating and the dividing portion which is the seal region is 700 mN / cm or less. preferable.
本発明の含余剰水発熱組成物の余剰水値は、０．５〜８０であり、好ましくは１〜８０であり、より好ましくは２．５〜８０であり、更に好ましくは５〜８０であり、更に好ましくは５〜７０であり、更に好ましくは５〜６５であり、更に好ましくは５〜６０であり、更に好ましくは１０〜６０であり、更に好ましくは１０〜５５であり、更に好ましくは１０〜５０であり、更に好ましくは１０〜４０であり、更に好ましくは１０〜３５であり、更に好ましくは１０〜３０である。
The surplus water value of the surplus water exothermic composition of the present invention is 0.5 to 80, preferably 1 to 80, more preferably 2.5 to 80, and further preferably 5 to 80. More preferably, it is 5-70, More preferably, it is 5-65, More preferably, it is 5-60, More preferably, it is 10-60, More preferably, it is 10-55, More preferably, it is 10 It is -50, More preferably, it is 10-40, More preferably, it is 10-35, More preferably, it is 10-30 .
以上のように作製した外袋に封入された発熱前駆体を５０℃の恒温槽に配置し、１５日〜３０日間保持した。１５日毎に測定個数を取り出し、余剰水値を測定した。余剰水値が０の含水発熱組成物を有する発熱体の試験群は発熱性能及び最小剛軟度の測定を行った。その結果を結果１、結果２、結果３に示す。 この結果より、外袋中に３０日間保持した含水発熱組成物は余剰水値が０になっており、立ち上がり昇温速度が大幅に向上し、すぐに温まる含水発熱組成物になっており、発熱体は優れた発熱性能を有し、最小剛軟度、最小剛軟度変化からすぐれた柔軟性を有していることが認められた。
The exothermic precursor enclosed in the outer bag produced as described above was placed in a thermostatic bath at 50 ° C. and held for 15 to 30 days. The measured number was taken out every 15 days and the excess water value was measured. A test group of heating elements having a hydrous exothermic composition with an excess water value of 0 measured the heat generation performance and the minimum bending resistance. The results are shown in Results 1, 2 and 3. From this result, the water-containing exothermic composition kept in the outer bag for 30 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up quickly. It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.
以上のように作製した外袋に封入された発熱前駆体を空調のない部屋に配置し、自然保存により、３０日〜１２０日間保持した。３０日毎に測定個数を取り出し、余剰水値を測定した。余剰水値が０の含水発熱組成物を有する発熱体は発熱性能及び最小剛軟度の測定を行った。その結果を結果４、結果５、結果６に示す。部屋の温度は、１２０日間中の最高温度は２４℃であり、平均温度は、約２０℃であった。この結果より、外袋中に６０日間保持した含水発熱組成物は余剰水値が０になっており、立ち上がり昇温速度が大幅に向上し、すぐに温まる含水発熱組成物になっており、発熱体は優れた発熱性能を有し、最小剛軟度、最小剛軟度変化からすぐれた柔軟性を有していることが認められた。
The exothermic precursor enclosed in the outer bag produced as described above was placed in a room without air conditioning, and kept for 30 to 120 days by natural preservation. The measured number was taken out every 30 days and the excess water value was measured. The heating element having a hydrous exothermic composition with a surplus water value of 0 was measured for heat generation performance and minimum bending resistance. The results are shown in Results 4, 5, and 6. As for the room temperature, the maximum temperature during 120 days was 24 ° C., and the average temperature was about 20 ° C. From this result, the water-containing exothermic composition kept in the outer bag for 60 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up quickly. It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.
（実施例６） 外袋として、透涅度１．５の外袋Ｃを使用した以外は実施例５と同様にして、複数個の、透湿度１．５の外袋Ｃ封入発熱前駆体を作製した。ついで、当該発熱前駆体について実施例５と同様にして保持及び保持後の発熱性能及び最小剛軟度の測定を行った。その結果を結果４、結果５、結果６に示す。この結果より、外袋中に３０日間保持した含水発熱組成物は余剰水値が０になっており、立ち上がり昇温速度が大幅に向上し、すぐに温まる含水発熱組成物になっており、発熱体は優れた発熱性能を有し、最小剛軟度、最小剛軟度変化からすぐれた柔軟性を有していることが認められた。
(Example 6) As an outer bag, a plurality of outer bag C-encapsulated exothermic precursors having a moisture permeability of 1.5 were prepared in the same manner as in Example 5 except that an outer bag C having a permeability of 1.5 was used. Produced. Subsequently, the exothermic precursor was measured in the same manner as in Example 5 for holding, exothermic performance after holding, and minimum bending resistance. The results are shown in Results 4 , 5 and 6 . From this result, the water-containing exothermic composition kept in the outer bag for 30 days has a surplus water value of 0, the rising temperature rising rate is greatly improved, and the water-containing exothermic composition warms up immediately, It was found that the body had excellent heat generation performance and had excellent flexibility from the minimum bending resistance and the minimum bending resistance change.
（実施例８） 発熱前駆体の各区分け部に手切れ可能なミシン目を設けた以外は実施例６と同様にして、複数個の、透湿度１．５の外袋Ｃ封入発熱前駆体を作製した。 ついで、当該発熱前駆体について実施例６と同様にして保持及び保持後の発熱性能及び最小剛軟度の測定を行った。 外袋中に１５日間保持し、余剰水値が０の含水発熱組成物を有する発熱体の最小剛軟度を測定した。発熱前の最小剛軟度は、３０ｍｍで、発熱終了後の最小剛軟度は、３０ｍｍであり、最小剛軟度変化は０であった。ミシン目により区分け部の最小剛軟性が最小になったと推定される。すぐれた柔軟性を有していることが認められた。
(Example 8) Except for providing perforated perforations at each section of the exothermic precursor , a plurality of exothermic precursors enclosed in an outer bag C having a moisture permeability of 1.5 were prepared in the same manner as in Example 6. Produced. Subsequently, the exothermic precursor was measured in the same manner as in Example 6 for holding and exothermic performance after holding and minimum bending resistance. It was kept in the outer bag for 15 days, and the minimum bending resistance of the heating element having a hydrous heating composition with an excess water value of 0 was measured. The minimum bending resistance before heat generation was 30 mm, the minimum bending resistance after completion of heat generation was 30 mm, and the change in minimum bending resistance was 0. It is estimated that the perforation has minimized the minimum stiffness of the section. It was found to have excellent flexibility.
（比較例４） 収納体のループスティフネスを１０００ｍＮ／ｃｍにした以外は、実施例２６と同様の発熱体を複数個、作成した。該発熱体を外袋より取り出し、粘着層にて、腰に固定し発熱試験をしたが、すぐに温かくなり、温かい時間が６時間以上続いが、該発熱体は、腰に沿わず、柔軟性はなく、使用感が悪く、実用性のない発熱体であった。最小剛軟度は測定不能であった。
(Comparative example 4) Except having made the loop stiffness of the storage body into 1000 mN / cm, the several heat generating body similar to Example 26 was created. The heating element was taken out from the outer bag, fixed to the waist with the adhesive layer, and a heat test was conducted. However, the heating element immediately became warm and the warm time lasted for 6 hours or more. However, the heating element did not follow the waist and was flexible. There was not, and it was a usability | use_condition and the heat generating body which was not practical. The minimum bending resistance was not measurable.