| 摘要 |
In one aspect, the present invention provides an exothermic article comprising a film comprising an expanded polymer, said film having at least some porosity; and an exothermic composition disposed within said expanded polymer wherein said exothermic article is flexible. In a further aspect, the invention is a laminate comprising an exothermic layer, said exothermic layer comprising a film, said film comprising an expanded polymer having at least some porosity and an exothermic composition disposed within said expanded polymer, and an oxygen management layer disposed on at least one side of said exothermic layer. In another aspect, the invention is a laminate comprising: a film comprising porous expanded polytetrafluoroethylene and having a porosity of at least about 5%; an exothermic composition disposed within the porous expanded polytetrafluoroethylene, the exothermic composition comprising an electrolyte and at least about 10 wt % iron powder; and an oxygen management layer adjacent to the film, In this aspect, the oxygen management layer may comprise a film having a plurality of perforations.
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