Method for producing laminated porous polyolefin film and...

Details Method for producing laminated porous polyolefin film and... Method for producing laminated porous polyolefin film and...

2007-10-16

2007-10-16

Ward, Jessica (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S324000, C156S244110, C156S244240

Reexamination Certificate

active

10791383

ABSTRACT:
Disclosed is a method for producing a laminated porous polyolefin film, the method comprising steps of:providing a pair of tools for thermocompression bonding two resin films therebetween,laminating two films each comprising at least one layer made of a polyolefin resin composition comprising 100 parts by weight of a polyolefin resin having a melt index of 0.1 g/10 min or less and 80 to 300 parts by weight of a filler to form a laminated film by piling and thermocompression bonding the films between the thermocompressing portions of the tools, wherein the surface temperature of each thermocompressing portion is adjusted to a temperature higher than the melting point of the polyolefin resin by from 5 to 25° C. during the lamination, anddrawing the laminated film to form micropores therein, thereby yielding a porous film.

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