The manufacture method of heat shrink films

The manufacture method of heat shrink films

  • CN 103,642,167 B
  • Filed: 09/12/2006
  • Issued: 04/13/2018
  • Est. Priority Date: 09/14/2005
  • Status: Active Grant
First Claim
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1. a kind of manufacture method of heat shrink films, this method include:

  • 1st blowing step, using containing by the poly- of block copolymer or its hydride (I) and at least one following (i)~(iv)Compound (II) form composition and in 50 DEG C storage elasticity moduli (E '"'"') be 0.7 ×

    109Pa~2.5 ×

    109The scope of PaMaterial, forms the pipe that thickness is 0.05mm~0.5mm, the content of the vinyl aromatic hydrocarbon of the block copolymer is 65 weightsMeasure the weight % of %~95, the content of conjugated diene is the weight % of 5 weight %~35, and with 30,000~200,000 scope andThere is the molecular weight distribution of at least one peak molecular weight, the combination respectively in the scope for being less than or equal to 1,000,000 more than 200,000The weight ratio of block copolymer or its hydride (I) and polymer (II) is 99/1~10/90, vinyl aromatic hydrocarbon in thingContent is the weight % of 76 weight %~81, and the material is based on point more than 200,000 of gel permeation chromatography (GPC) measureSon amount ratio is the weight % of 15 weight %~70;

    AndThe 2nd blowing step being carried out continuously with the 1st blowing step, is squeezing the pipe in 65 DEG C~100 DEG C of fluidPressure vertical (TD) is just pulled up 1.5 times~5 times film forming,(i)~(iv) be:

    (i) be different from the block copolymer or its hydride (I), formed by vinyl aromatic hydrocarbon and conjugated diene it is embeddingSection copolymer or its hydride, wherein, vinyl aromatic hydrocarbon content is the weight % of 20 weight %~40,(ii) copolymer formed by vinyl aromatic hydrocarbon and aliphatic unsaturated carboxylic acid analog derivative,(iii) vinyl aromatic hydrocarbon polymer,(iv) rubber modified styrenics polymer.

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