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公开(公告)号：US3729538A
公开(公告)日：1973-04-24
申请号：US3729538D
申请日：1970-10-02
Applicant: POROUS PLASTICS LTD
Inventor： CUNNINGHAM V , BOUTLE D
CPC classification number: C08J9/26 , C08J2201/0544 , Y10S264/77 , Y10S428/904
Abstract: FOR A METHOD OF MAKING WATER VAPOUR PERRMEABLE FLEXIBLE SHEET MATERIALS WHICH FIND USES AS REPLACEMENTS FOR LEATHER IN WHICH THE MATERIAL IS FORMED FROM A LAYER OF A MIXTURE OF POWDERED REMOVABLE FILLER DISPERSED THROUGH POLYMER SOLUTION WHICH ADHERES TO A TEMPORARY BACKER AND IS COAGULATED AND THE FILLER LEACHED OUT BY SUITABLE LIQUID TREATMENT THE ADVANTAGES OF CERTAIN RATIOS OF POLYMER TO SOLVENT AND CERTAIN RELATIVELY HIGH RATIOS BELOW 3:1 OF FILLER TO POLYMER IN THE MIXTURE ARE SET OUT.
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