PROBLEM TO BE SOLVED: To provide a high-safety heat retainer.SOLUTION: The heat retainer for warming an object to be warmed by dissipating heat accumulated in a heat storage material includes: the heat storage material consisting of a non-polar molecule as a main component an inner bag for vacuum packaging the heat storage material an outer bag including the inner bag and having an openable/closable opening and a liquid holding member capable of holding a liquid consisting of a polar molecule as a main component. The liquid holding member is arranged between the inner bag and the outer bag.COPYRIGHT: (C)2013,JPO&INPIT【課題】 安全性の高い保温具を提供する。【解決手段】 蓄熱材に蓄積した熱の放散により、保温対象を温める保温具であって、主成分が無極性分子から成る蓄熱材と、その蓄熱材を真空包装する内袋と、その内袋を包容し、開閉可能な開口部を有する外袋と、主成分が極性分子からなる液体を保持可能な液体保持部材と、を備え、内袋と外袋の間に液体保持部材を配置する保温具。【選択図】 図1
