| 摘要 |
PROBLEM TO BE SOLVED: To provide a low temperature shrinkable monolayered or multilayered film with excellent low temperature extensibility, heat shrinkability, spontaneous shrinkability, impact resistance, stretchability by extraction, weatherability, and optical and appearance properties. SOLUTION: The low temperature heat shrinkable monolayered film is a copolymer of 95-20 wt.% of a vinylaromatic hydrocarbon and 5-80 wt.% of an aliphatic unsaturated carboxylic acid and/or its alkyl ester. The vinyl aromatic hydrocarbon composition copolymer is composed of 85-50 wt.% of a copolymer (a) having Vicat temperature of 52-90°C and 15-50 wt.% of a copolymer (b) composed of 85-50 wt.% of the vinyl aromatic hydrocarbon and 15-50 wt.% of a conjugated diene monomer with hydrogenation rate of 70% or over having a peak of tanδ(loss tangent) in viscoelasticity determination at -20 to 40°C. The low temperature heat shrinkable multilayered film contains the low temperature heat shrinkable monolayered film. COPYRIGHT: (C)2005,JPO&NCIPI
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