| 摘要 |
PURPOSE:To obtain a hollow molded form having excellent heat resistance and transparency by specifying a composition ratio, mixture melting temgerature of polymer mixture and haze after injection molding and orientation. CONSTITUTION:A polyester hollow molded form has a ratio of ethylene terephthalate unit to carbonate unit of 90/10-70/30, a glass transition temperature of 80-95 deg. and a haze of an oriented part of 30% or less. The haze of a sheetlike material having a thickness of 0.3mm when such a mixture of polyester and polycarbonate is mixed in a melted state at a temperature range of 280-320 deg.C for 1-3min, and then injection molded to be elongated to an area magnification of 12.5 times is 30% or less. Such a hollow molded form has heat resistance of 85 deg.C and excellent transparency. |
