| 摘要 |
PURPOSE:A biaxially oriented polyester bottle suitable for food, drink, etc., having improved gas barrier properties and dropping impact resistance, having a mouth part and a chest part made of a composition consisting of polyethylene terephthalate and a thermoplastic polymer and a bottom part made of poyethylene terephthalate, etc. CONSTITUTION:A bottomed preform having a mouth part and a chest part of bottle, consisting of (A) a composition comprising A1: 95-50wt% polyethylene terephthalate having >=0.6 intrinsic viscosity and A2: 5-50wt% thermoplastic polymer (e.g., olefin vinyl alcohol copolymer, etc.,) having <=1X10<-13> (cc.cm/cm<2> .sec.cmHg) permeability constant of carbonic acid (30 deg.C) and a bottom part comprising (B) a single layer of polyethylene terephthalate or a laminated structure consisting of a layer of the component A and a layer of a composition of the components A1 and A2 having a lower A2 content than the component A, is blow molded and biaxially drawn, to give bottles. |
