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Low birefringence film

  • US 20040121174A1
  • Filed: 12/23/2002
  • Published: 06/24/2004
  • Est. Priority Date: 12/23/2002
  • Status: Active Grant
First Claim
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1. A coextruded film comprising a transparent polymeric inner core layer of thickness less than 250 μ

  • m and two peelable outer polymeric layers wherein the inner layer constitutes a low enough proportion, less than 40%, of the total film thickness and exhibits a low enough melt flow index value to achieve a birefringence of not more than 1×

    10

    4
    nm/nm.

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