| 摘要 |
PROBLEM TO BE SOLVED: To improve heat resistance at a low orientation magnification and transparency in high temperature molding by transesterifying a polyarylate dry blended with a polyethylene terephthalate in a heating cylinder of an injection molding machine. SOLUTION: A polyethylene terephthalate and a heat resistant polyarylate are transesterified in an environment of a molding material obtained by dry blending the heat resistant polyarylate with the polyethylene terephthalate of the polyester alloy oriented blow molded container by heating, kneading and back pressure plasticizing in a heating cylinder of an injection molding machine to generate a polyester alloy. The preform is manufactured by injection molding the alloy, and the preform made of the alloy is biaxially stretch blow molded. Thus, its heat resistance is upgraded. |
