Apertured film and net like fabrics from thermoplastic...

Details Apertured film and net like fabrics from thermoplastic... Apertured film and net like fabrics from thermoplastic...

B - Operations, Transporting

29

D

18/767

B29D 28/00 (2006.01)

Patent

CA 1324473

APERTURED FILM AND NET LIKE FABRICS FROM THERMOPLASTIC MATERIALS Abstract of the Disclosure A method of making apertured films includes the step of perforating films of thermoplastic materials with embossing rolls engraved with patterns which form small slits or incipient slits in the sheet. The patterns are such that the design on the roll includes lands, or raised areas, which cross lands of the opposing roll at an acute angle. The perforated or partially perforated film formed may then be further processed by orientation, uniaxial or biaxial, simultaneous or sequential; by heat treatment; or both to modify the porosity, hole size, or other properties as desired.

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