Heating element

Abstract

Abstract PURPOSE:To provide the heating element formed by using a perforated packing material having less variations in exothermic performance, such as exothermic temp. and duration time. CONSTITUTION:This heating element is constituted by housing an exothermic agent which generates heat in the presence of air in an exothermic agent housing bag having an air permeable surface. The porous packaging material obtd. by laminating a resin compsn. consisting of a thermoplastic resin and filler on a non-woven fabric, then stretching this compsn. simultaneously with the non-woven fabric is used for the air permeable surface of the exothermic agent housing bag.

Inventors

• 👤 Tadatoshi Ogawa
• 👤 忠俊 小川
• 👤 Toshio Kawakita
• 👤 敏夫 川北
• 👤 Takanori Kume
• 👤 孝典 久米

Bibliographic Details