List or biaxially drawn films

List or biaxially drawn films

  • CN 1,052,277 A
  • Filed: 09/24/1990
  • Published: 06/19/1991
  • Est. Priority Date: 09/25/1989
  • Status: Abandoned Application
First Claim
Patent Images

1. , produces the method for single shaft or biaxially drawn films, this method is that the polymer sheet that will not stretch or stretch slightly stretches along one or two direction of principal axis respectively, it is characterized in that, a kind of line style ternary alternating copolymer stretches, it is obtained by second kind of ethylenically unsaturated hydrocarbons copolymerization of carbon monoxide, ethene and 3 carbon atoms at least, the fusing point of this terpolymer is at least 214 ℃

  • , draft temperature between 175 ℃ and

    205 ℃

    , stretch ratio at least 4.

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