Sheets and films of polyolefinic material, similar to paper,...

Details Sheets and films of polyolefinic material, similar to paper,... Sheets and films of polyolefinic material, similar to paper,...

B - Operations, Transporting

29

D

18/1013

B29D 7/00 (2006.01) C08J 5/06 (2006.01)

Patent

CA 1062424

ABSTRACT OF THE DISCLOSURE Sheets, films and other articles having a fibrous structure similar to that of cellulosic paper and consisting entirely or prevailing of polyolefin fibers are prepared by (a) forming a sheet or homogeneous panel which is substantially anhydrous and consists for at least 70% by weight of fibrils of at least one polyolefin having a molecular weight of from 30,000 to 300,000 and a Melt Index of from 1.5 to 30; (b) sintering the polyolefin fibrils by heating the sheet or panel under pressure at a temperature equal to or higher than the softening temperature of the polyolefin and until the polymer fibrils at the surfaces only of the sheet or panel are at least partially melted; and (c) cooling the sheet or panel to room temperature.

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