Oriented polyolefin film with amorphous polymer, a process...

Details Oriented polyolefin film with amorphous polymer, a process... Oriented polyolefin film with amorphous polymer, a process...

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) B29C 55/00 (2006.01) B29C 55/02 (2006.01) B29D 7/01 (2006.01) B32B 5/18 (2006.01) B32B 27/32 (2006.01) C08L 23/12 (2006.01) B32B 31/16 (1995.01)

Patent

CA 2145500

The disclosed oriented polyolefin film contains at least one voided layer. The voided layer contains an amorphous void--initiating polymer which, after orienting, is present as a separate particle inside the void. In the process for producing the polyolefin film, a molten blend comprising an olefin polymer and the amorphous polymer is extruded through a die at an extrusion temperature above the glass temperature or Vicat softening point of the amorphous polymer, the resulting film is drawn off on one or more rollers, and is then subjected to stretch orientation, followed optionally by thermofixing and a surface treatment.

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