TEMPERATURE-SENSITIVE MICROPOROUS FILM

摘要

PROBLEM TO BE SOLVED: To provide a microporous material/film and a method for producing it containing a compatible melt-processible polymer mixture.

SOLUTION: This invention relates to a single or multi-layer microporous material and a method for producing it. In the single or multi-layer microporous material, at least one layer contains a compatible, melt-processible polymer mixture having a first polymer component with a melting point higher than 140°C and a second polymer component having a melting point lower than 120°C. The first polymer component and the second polymer component are miscible in a compound or compatible liquid when heated above the melting temperature of the first polymer component or above the liquid-liquid phase separation temperature and phase separate from the compound or compatible liquid when cooled. The material/film can be used as a part of the single or multi-layer structure or used as articles such as a battery separator and a temperature indicator.

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