| 摘要 |
Disclosed is a method for the production of a gas-pervious composite film comprising the steps of unaxially or biaxially drawing a film composed of a crystalline polyolefin resin, a rubbery polymer, and a filler thereby forming a drawn film, joining said drawn film to a meshed sheet by hot pressing at a temperature exceeding the temperature at which said drawn film begins to undergo thermal shrinkage thereby fastening said drawn film to said meshed sheet and, simultaneously, causing thermal shrinkage of said drawn film and consequently imparting a microporous texture to said film. |
