1
Takashi Suzuki: Process for producing porous polymer film. Matsushita Electric Industrial, Stevens Davis Miller & Mosher, August 8, 1978: US04105737 (14 worldwide citation)

A porous polymer film having many fine voids which are flat in the thickness direction can be prepared by forming many fine cracks in a stretchable polymer composition having a fine phase separation structure, heating the thus treated polymer composition to its stretching temperature under tension, ...


2
Process for producing porous polymer film. Matsushita Electric, June 16, 1977: GB1476791-A (1 worldwide citation)

1476791 Stretched porous polymer films MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 7 June 1974 [11 June 1973 6 Feb 1974] 25489/74 Heading C3C Porous polymer films are made by the separate sequential steps of (a) forming voids in a stretchable polymer composition having a phase separation structure (i.e. i ...


3
Suzuki Takashi: Methode de production dune pellicule en polymere poreux, Process for producing porous polymer film. Matsushita Electric Industrial, December 19, 1978: CA1044419

Abstract of the Disclosure A process for producing a porous polymer film, havingmany fine voids which are flat in the thickness direction, com-prises forming many fine cracks in a stretchable polymer composi-tion having a fine phase separation structure by mechanicaldeformation or chemical treatment ...