| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a polystyrene multi-layer sheet which does not generate breakage, cracks, etc., in a process for producing the laminate and is suitable for producing a thick polystyrene multi-layer stretched film. SOLUTION: In the method for producing the polystyrene laminate, SPS or an SPS-containing composition and atactic polystyrene the viscosity at die temperature of which is lower than that of the SPS or the SPS-containing composition are co-extruded, and the end part surface is formed by a layer of the atactic polymer or a polymer composition containing the atactic polymer.
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