| 摘要 |
PURPOSE:To increase transparency and improve the yield of product by a method wherein the copolymer of vinyl chloride-vinyl acetate is blended with plasticizing agent, stabilizing agent and lubricant to mold and orient vinyl chloride series resin compound. CONSTITUTION:The vinyl chloride series resin compound, consisting of 100pts.wt. of vinyl chloride-vinyl acetate copolymer, containing 1-30wt% of vinyl acetate and blended with 10pts.wt. or less of plasticating agent, stabilizing agent and lubricant, is molded and oriented. The copolymer, containing 1-30wt% of vinyl chloride, especially 3-15wt%, is preferable and the copolymer, containing less than 1wt%, makes it hard to orient it with a high draw ratio while the copolymer, containing more than 30wt% of vinyl acetate, makes the heat stability worse remarkably. 10pts.wt. or less of plastic izing agent is used per 100pts. wt. of vinyl chloride-vinyl acetate copolymer, which is the material of main material, for the purpose of obtaining hard heat-shrinkable molded product.
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