公开(公告)号：US3794548A

公开(公告)日：1974-02-26

申请号：US3794548D

申请日：1971-12-27

Applicant: HOOKER CHEMICAL CORP

Inventor： WIRTH C ,  ALBI G

IPC: D06N3/00 ,  B32B3/00

CPC classification number: D06N3/0095 ,  C08J2201/0502 ,  Y10T428/2395 ,  Y10T428/23986 ,  Y10T428/24512 ,  Y10T428/24996 ,  Y10T428/249991 ,  Y10T428/26 ,  Y10T428/265 ,  Y10T428/31554 ,  Y10T428/3188 ,  Y10T428/31909 ,  Y10T442/2139

Abstract: A POROUS, BREATHABLE, POLYMER FILM IS PRODUCED BY FORMING A SUBSTANTIALLY NON-POROUS CONTINUOUS POLYMER FILM ON A SUPPORT MEMBER, APPLYING A LAYER OF FILM-FORMING POLYMER COMPOSITION TO SAID NON-POROUS FILM; AND HEATING THE RESULTING STRUCTURE ABOVE THE SOFTENING POINT OF THE NON-POROUS FILM TO FORM A UNITARY, POROUS BREATHABLE ARTICLE COMPRISED OF BOTH POLYMER LAYERS. THE FIRST POLYMER FILM CAN BE FORMED BY APPLYING TO THE SUPPORT MEMBER A LAYER OF A FIRST FILM-FORMING FLEXIBLE POLYURETHANE SOLUTION COMPRISING A POLYURETHANE COMPOSITION AND DILUENT THEREFOR. THE SUPPORT MEMBER CAN BE STRIPPED FROM THE FIRST POLYMER FILM. COATED FABRICS CAN ALSO BE PRODUCED BY APPLYING A FABRIC MATERIAL TO THE SECOND LAYER BEFORE HEATING THE RESULTING STRUCTURE TO FORM THE UNITARY POROUS, BREATHABLE ARTICLE.