METHOD FOR PRODUCING MICROPOROUS PLASTIC FILM - TORAY BATTERY SEPARATOR FILM

Title:

METHOD FOR PRODUCING MICROPOROUS PLASTIC FILM

Document Type and Number:

WIPO Patent Application WO/2016/132810

Kind Code:

A1

Abstract:

Provided is a method for producing, with high productivity, a microporous plastic film having excellent physical properties and mechanical properties by preventing slippage even in wet roller drawing. This method for producing a microporous plastic film is a method for producing a uniaxially or biaxially drawn microporous plastic film by kneading a diluent and a polyolefin polymer with an extruder, discharging the diluent-kneaded polymer from a die in a sheet form, cooling and solidifying the sheet discharged from the die on a drum, then reheating the solidified sheet, drawing the same in a sheet transporting direction with a plurality of rollers, cooling the sheet drawn in the sheet transporting direction, then gripping both ends of the sheet with clips, introducing the sheet into a tenter, and then cleaning the diluent, wherein: there are at least two sections in which the sheet is drawn between said plurality of rollers; and the ratio of each of the plurality of drawing sections is substantially the same.

More Like This:

WO/2008/045260	PACKAGE APPLICATIONS USING POLYLACTIC ACID FILM
JP4358133	A method for producing a sheet material, a block-shaped sheet material, a sheet material, and a method for separating and recovering a fiber forming layer unit and a backing layer from a tile carpet.

Inventors:

ICHINOMIYA TAKASHI (JP)
SUGATA MASAMI (JP)

Application Number:

PCT/JP2016/051780

Publication Date:

August 25, 2016

Filing Date:

January 22, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TORAY BATTERY SEPARATOR FILM (JP)

International Classes:

B29C48/08; B29C48/305; B29C48/885; B29C55/04; B29C55/12; B29C67/20; C08J9/26

Foreign References:

JP2012500130A	2012-01-05
JP2013234327A	2013-11-21

Other References: