PROBLEM TO BE SOLVED: To provide a warmer for microwave heating, which prevents explosive rupture or the like when it is erroneously overheated by microwave heating of a microwave oven, and is to be fitted to various parts of the body.SOLUTION: The warmer for microwave heating includes: a hydrous gel-like heat storage material a sealed bag which encloses the heat storage material an inner cover which covers the sealed bag and has a ventilation part for making gas pass through but blocking passing of the heat storage material and an outer cover which covers the inner cover and has a ventilation part for making the gas pass through but blocking the passing of the heat storage material. The sealed bag includes a synthetic resin base body, and a synthetic resin joining layer interposed and arranged at the peripheral edge part of the synthetic resin base body to join the synthetic resin base bodies with each other. The synthetic resin base body has heat resistance so as not to be thermally deformed even by overheating of the heat storage material, and at one part of the synthetic resin joining layer, a weak joining part where joining strength is thermally weaker than the other normal joining part due to the overheating of the heat storage material is disposed.COPYRIGHT: (C)2013,JPO&INPIT【課題】電子レンジのマイクロ波加熱によって誤って過熱される場合に爆発的な破裂等を防止するとともに、身体の様々な部位にフィットするマイクロ波加熱用の加温具を提供する。【解決手段】含水ゲル状蓄熱材と、蓄熱材が封入される密封袋体と、密封袋体を覆うとともに気体を通過させるものの蓄熱材の通過を妨げる通気部を有する中カバーと、中カバーを覆うとともに気体を通過させるものの蓄熱材の通過を妨げる通気部を有する外カバーと、を備え、密封袋体は、合成樹脂ベース体と、合成樹脂ベース体の周縁部に介在配置されて合成樹脂ベース体同士を接合する合成樹脂接合層と、によって構成され、合成樹脂ベース体は、蓄熱材の過熱によっても熱変形しない耐熱性を有し、合成樹脂接合層の一部分には、蓄熱材の過熱により他の通常接合部分よりも熱的に接合強度が劣ってしまう弱接合部分を配設する。【選択図】図3
