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Oriented multilayer polyolefin films

  • US 20030049436A1
  • Filed: 01/22/2001
  • Published: 03/13/2003
  • Est. Priority Date: 02/16/2000
  • Status: Active Grant
First Claim
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1. A film comprising at least one primary layer and at least one secondary layer, wherein the primary layer comprises a propylene-containing polymer having a first melting point and the secondary layer comprises a propylene-containing polymer having a second melting point, wherein the second melting point is greater than the first melting point and the multi-layered construction is biaxially stretched, such that that the stretched film exhibits a difference in birefringence wherein Δ

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    10

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