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Title:
PRODUCTION OF POROUS MEMBRANE OF POLYTETRAFLUOROETHYLENE-BASED RESIN
Document Type and Number:
Japanese Patent JPH06128406
Kind Code:
A
Abstract:

PURPOSE: To produce a porous membrane of a polytetrafluoroethylene-based resin excellent in mechanical performances (strength and elongation and puncture pressure).

CONSTITUTION: In this method for producing a porous membrane of polytetrafluoroethylene-based resin, comprising molding an uniform mixture obtained by mixing a dispersion of the polytetrafluoroethylene-based resin with a fiber forming polymer and then heat-treating the resultant moldings at a temperature not lower than melting point of the resin and removing the fiber- forming polymer, preliminary heat treatment is carried out at ≥160°C and a temperature lower than melting point of the resin prior to the heat treatment.


Inventors:
YOSHIKAWA SEIICHI
KAWAI TAKASHI
Application Number:
JP28160692A
Publication Date:
May 10, 1994
Filing Date:
October 20, 1992
Export Citation:
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Assignee:
TORAY INDUSTRIES
International Classes:
B01D71/36; B29B13/02; C08J9/26; C08J9/28; B29K27/18; B29K105/04; (IPC1-7): C08J9/26; B01D71/36; C08J9/26; C08J9/28