Sterilization wrap material

Details Sterilization wrap material Sterilization wrap material

B - Operations, Transporting

32

B

B32B 27/12 (2006.01) A41D 13/12 (2006.01) A61L 2/26 (2006.01) B29C 59/02 (2006.01) B29C 59/04 (2006.01) B32B 3/28 (2006.01) B32B 38/04 (2006.01) B65D 65/38 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2149701

A polyolefin film for use as a sterilization wrap material which includes a film with a thickness of from about 0.005 mm to about 0.2 mm and having a plurality of discontinuous thinned regions. The thinned regions constitute at least about 25 percent of the surface area of the film. The thickness and area of thethinned regions are adapted to permit the passage of steam and water vapor through the film during steam sterilization. The film is made by a method whichinvolves extruding a molten polyolefin film at a first temperature and passing the molten film through a nip. The nip includes an anvil roll and a pattern roll. The anvil roll has a smooth surface and the surface of the pattern roll is maintained at a temperature which is at least about 150°C lower than the first temperature and is selected to prevent sticking of the film to either roll.

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