Heat-shrinkable polystyrene based resin film roll and method for production thereof, and heat-shrinkable label

Heat-shrinkable polystyrene based resin film roll and method for production thereof, and heat-shrinkable label

  • CN 1,543,396 B
  • Filed: 08/15/2002
  • Issued: 06/09/2010
  • Est. Priority Date: 08/17/2001
  • Status: Active Grant
First Claim
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1. heat-shrinkable polystyrene based resin film roll, be to reel the heat-shrinkable polystyrene based resin film that forms by the different resins that constitute more than 2 kinds and the film that forms is rolled up, it is characterized in that, in the stable stability region of the curtain coating direction upper film rerum natura when making film of described heat-shrinkable polystyrene based resin film, the end of the coiling of film volume being finished side is set at top, the end of the beginning side of reeling is set at terminal, inboard 2m at described top is provided with the 1st place cutting portion with interior position, and after since the every approximately 100m of the 1st place cutting portion 1 place cutting portion being set, the percent thermal shrinkage of using each sample of representing with respect to the tensile strain rate on the main shrinkage direction before the above-mentioned processing that to 85 ℃

  • of hot water, be measured after the impregnation process from the sample of each cutting portion cutting through 10 seconds, the percent thermal shrinkage mean value of whole samples ±

    5% in, the polystyrene that contains syndiotactic structure in the described heat-shrinkable polystyrene based resin film as principal component, also contain rubber constituent simultaneously, the main shrinkage direction of described heat-shrinkable polystyrene based resin film is a transverse direction, cut into width 15mm, on the described heat-shrinkable polystyrene based resin film sample of length 210mm, along main shrinkage direction is the interval marking scale with 200mm, and main shrinkage direction at described sample, carry out since 100 ℃

    of per 10 ℃

    of heating 1 minute after 150 ℃

    processing with respect to the peaked maximum heat shrinkage factor of the tensile strain rate of length between the scale before the above-mentioned processing more than 62%, the length of described heat-shrinkable polystyrene based resin film roll is 1000-6000 rice.

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