公开(公告)号：US3589929A

公开(公告)日：1971-06-29

申请号：US3589929D

申请日：1968-05-13

Applicant: ALGEMENE KUNSTZIJDE UNIE NV

Inventor： SMOLDERS CORNELIS A ,  GEUSGENS JOSEPH T V M

IPC: C08J9/26 ,  C08J9/28 ,  D04H1/4258 ,  D04H1/4309 ,  D04H1/482 ,  D04H1/488 ,  D04H1/587 ,  D04H1/645 ,  D06N3/00 ,  B29D27/04 ,  B44D1/44

CPC classification number: D04H1/4309 ,  C08J9/26 ,  C08J9/28 ,  C08J2201/052 ,  D04H1/4258 ,  D04H1/482 ,  D04H1/488 ,  D04H1/587 ,  D04H1/645 ,  D06N3/0052 ,  Y10S428/904 ,  Y10T428/249953 ,  Y10T442/2033 ,  Y10T442/2139

Abstract: A PROCESS FOR THE MANUFACTURE OF A POROUS SHEET MATERIAL WHICH COMPRISES THE STEPS OF APPLYING A LIQUID HOMOGENEOUS MIXTURE OF A POLYMER, E.G., A POLYURETHANE, AND AN AUXILIARY SUBSTANCE, E.G., CAPROLACTAM, TO A SUBSTRATE, COOLING THE MIXTURE TO A TEMPERATURE AT WHICH THERE IS FORMED A SOLID PHASE SUBSTANTIALLY COMPRISING THE POLYMER, THE AUXILIARY SUBSTANCE COMPRISING A SOLVENT FOR THE POLYMER WHICH UPON COOLING OF THE MIXTURE PRECIPITATES FROM THE MIXTURE INTO A SEPARATE SOLID PHASE BEFORE THE FORMATION OF THE SOLID POLYMER PHASE IS COMPLETED, AND THEREAFTER REMOVING THE AUXILIARY SUBSTANCE TO FORM A HOMOGENEOUS UNIFORM POROUS SHEET MATERIAL.