POLYESTER NULTI-LAYER SHEET AND MOLDING USING THIS SHEET

摘要

PROBLEM TO BE SOLVED: To provide a polyester multi-layer sheet with outstanding resistances to heat and impact and high container moldability and provide a molding formed by using the sheet. SOLUTION: This multi-layer sheet molding is of the multi-layer structure consisting of a layer for forming a surface layer comprising 92-98wt.% of polyethylene terephthalate resin and 8-2wt.% of polyethylene with an intrinsic viscosity of at least 0.70dl/g and a layer for forming an inner layer comprising 92-98wt.% of polyethylene terephthalate resin and 8-2wt.% of modified polyolefin resin with an intrinsic viscosity of at least 0.70dl/g. In addition, the polyester multi-layer sheet shows a coefficient of thermal shrinkage of 2-8% as measured by JIS K6734, and the crystallinity index of the surface layer molded using the sheet is 10-40%.