Process for production of heat shrinkable film

Process for production of heat shrinkable film

  • CN 103,642,167 A
  • Filed: 09/12/2006
  • Published: 03/19/2014
  • Est. Priority Date: 09/14/2005
  • Status: Active Application
First Claim
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1. a manufacture method for heat-shrinkable film, the method comprises:

  • The 1st blowing operation, is used and to contain segmented copolymer or its hydride (I) and be 0.7 * 10 in the storage Young'"'"'s modulus of 50 ℃

    (E '"'"') 9pa~

    2.5 * 10 9the material of Pa, the pipe that formation thickness is 0.05mm~

    0.5mm, the content of described segmented copolymer medium vinyl aromatic hydrocarbons is that the content of 65 % by weight~

    95 % by weight, conjugated diolefine is 5 % by weight~

    35 % by weight;

    And With the 2nd blowing operation that described the 1st blowing operation is carried out continuously, 1.5 times~

    5 times film forming stretch described pipe in the fluid of 65 ℃



    100 ℃

    in vertical (TD) direction of extruding.

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