Method for making flat cellular vinyl sheet

Details Method for making flat cellular vinyl sheet Method for making flat cellular vinyl sheet

B - Operations, Transporting

29

D

18/647

B29D 27/00 (1980.01)

Patent

CA 1118567

1770077 A METHOD FOR MAKING FLAT CELLULAR VINYL SHEET Abstract of the Invention Flat cellular vinyl chloride and vinylidene chloride polymer sheets are made by coextruding a cellular forming chloride or vinylidene chloride polymer material with a noncellular, incompatible polyolefin capstock. The noncellular, incompatible capstock restricts the expansion of the cellular material in the lateral direction, thus maintaining the sheet in a flat condition. Since the capstock is incompatible, it can be easily stripped off the cellular sheet after cooling or after the sheet is converted into the final product.

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