Process for preparing a composite moisture-permeable sheet material
Abstract
Abstract A LEATHER-LIKE SHOE-UPPER MATERIAL USEFUL FOR THE MANUFACTURE OF HIGH QUALITY DRESS SHOES IS PREPARED BY FIRST MAKING A MOISTURE-PERMEABLE SHEET MATERIAL HAVING A LAYER OF MICROPOROUS POLYMERIC COMPOSITION IN SUPERPOSED ADHERENCE WITH A FIBROUS SUBSTRATE SUCH AS A SINGLE OR MULTIPLE LAYER FABRIC, SAID LAYER OF COMPOSITION HAVING A PORE STRUCTURE WHICH MAKES IT IMPOSSIBLE TO OBTAIN A UNIFORMAPPEARING FINISH UNDER PRACTICAL MANUFACTURING CONDITIONS WHEN ONE OF MORE FINISH COATS IS APPLIED AND THE COATED SURFACE IS GRAIN-EMBOSSED; THEN THE SHEET MATERIAL IS SUBJECTED TO HEAT AND PRESSURE UNDER CAREFULLY REGULATED CONDITIONS UNTIL THE PORE STRUCTURE OF SAID LAYER OF COMPOSITION IS MODIFIED AND CONSOLIDATED TO SUUCH AN EXTENT THAT THE SURFACE CAN BE FINISH-COATED AND GRAIN-EMBOSSED TO PROVIDE A PRODUCT HAVING NOT ONLY SATISFACTORY BREATHABILITY BUT ALSO OUTSTANDING UNIFORMITY IN SUCH CRITICAL APPEARANCE PROPERTIES AS COLOR, GRAIN PATTERN AND SMOOTHNESS.
Inventors
- 👤 Michael R Lauro
Bibliographic Details
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