| abstract |
A METHOD OF CONTINUOUSLY MANUFACTURING FOAM SHEETS COMPRISING MIXTURE A POLYOLEFIN, DECOMPOSABLE BLOWING AGENT AND A CROSSS LINKING AGENT, SHAPING THE MIXTURE INTO A SHEET, HEATING ONLY THE SURFACES OF THE SHEET TO ABOUT 100*C. TO ABOUT 300*C. TO PREVENT STICKING OF THE SHEET TO THE SUPPORTING MEDIUM, IMMEDIATELY COOLING SAID SURFACES AND THEN HEATING THE ENTIRE SHEET TO DECOMPOSE THE CROSS-LINKING AND BLOWING AGENTS. THE SUPPORTING MEDIUM CONTAINS HOLES WHICH LEAVE A LARGE NUMBER OF FINE AREAS EXPOSED TO DIRECT HEAT. D R A W I N G |