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聚酯树脂容器及其成型方法
Polyester resin container and molding process thereof
US-8409490-B2用于制造可耐高温蒸煮的聚酯树脂容器。
专利摘要
本发明要解决的技术问题是开发一种可在高于120°C至约130°C的温度范围内进行蒸煮处理的聚酯树脂容器。本发明的目的是提供一种能够提高蒸煮食品的生产率和质量的聚酯树脂容器及其成型方法。本发明的方法是双重吹塑成型方法，包括：初次吹塑成型步骤，其中将预成型件双轴拉伸并吹塑成型为初级中间产品；热收缩成型步骤，其中将初级中间产品加热并强制收缩成型为次级中间产品；以及二次吹塑成型步骤，用于将次级中间产品吹塑成型为容器，其特征在于在二次吹塑成型步骤中使用高于210°C的模具温度。
Original abstractThe technical problem to be solved by this invention is to develop a polyester resin container that can be retort-processed at a temperature in the range of above 120° C. to about 130° C. The object of this invention is to provide a polyester resin container, which is capable of improving the productivity and quality of retort foods, and a molding process thereof. The process of this invention is a double blow molding process, which comprises a primary blow molding step in which a preform is biaxially drawn and blow molded into a primary intermediate product, a thermally shrink-molding step in which the primary intermediate product is heated and forcibly shrink-molded into a secondary intermediate product, and a secondary blow molding step for blow molding the secondary intermediate product into a container, wherein the process is characterized in that a mold temperature higher than 210° C. is used in the secondary blow molding step.
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