The cross directional stretch method of the super thin bidirectional stretched polyester film of ultra-wide

The cross directional stretch method of the super thin bidirectional stretched polyester film of ultra-wide

  • CN 102,275,298 B
  • Filed: 08/09/2011
  • Issued: 09/30/2015
  • Est. Priority Date: 08/09/2011
  • Status: Active Grant
First Claim
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1. the cross directional stretch method of the super thin bidirectional stretched polyester film of ultra-wide, for the manufacture of fabric width more than 4m, thickness at 4.5um and following biaxially oriented polyester film, described cross directional stretch process comprises preheating, stretching, thermal finalization, lax, cooling five operations, described lax time temperature be 150-170 DEG C, it is characterized in that:

  • during described thermal finalization, temperature is 225-235 DEG C, be 950-1200rpm for hot blast being blowed to the rotation speed of fan of film, thermal finalization distance is 12m;

    Described lax time relaxation rate be 3.0-4.5%;

    When occurring wearing film or rupture of membranes situation, be 300-500rpm for hot blast being blowed to the rotation speed of fan of film.

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