摘要 |
PROBLEM TO BE SOLVED: To provide a multilayered molded product which is formed into a multilayered stretched molded product characterized in that the transparency of a bottle even in a long-time continuous molding operation of a large number of bottles using the same heating and stretching mold because the content of a cyclic trimer or AA content in an outer layer or inner and outer layers is reduced and the flavor properties of the bottle are also enhanced, the multilayered stretched molded product comprising it and a manufacturing method of the multilayered molded product. SOLUTION: The multilayered molded product has a multilayered structure comprising at least a thermoplastic polyester layer (A) obtained from a molten material which is subjected to degassing treatment after melt polycondensation reaction to be reduced to 30 ppm or below in the content of acetaldehyde and a thermoplastic polyester layer (B) with a cyclic trimer content of 5,000 ppm or below and an acetaldehyde content of 20 ppm or below. COPYRIGHT: (C)2007,JPO&INPIT
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