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Rigid cycloolefin copolymer film

  • US 5,534,606 A
  • Filed: 02/14/1994
  • Issued: 07/09/1996
  • Est. Priority Date: 02/12/1993
  • Status: Expired due to Term
First Claim
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1. A film having at least one layer in which at least one of said layers comprises a non-ring opening cycloolefin copolymer, wherein the cycloolefin copolymer has an intrinsic E modulus (Ei) satisfying the following relation:

  • 
    
    space="preserve" listing-type="equation">E.sub.i =(0.0025[GPa/°

    C.]×

    T.sub.g [°

    C.])+B[GPa]where B=2.93-3.19 and Tg is the glass transition temperature of the cycloolefin copolymer.

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