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標題: PET瓶胚設計參數之探討
A Study of Parameters for PET Preform Design
作者: 鄭基鋒
Cheng, Ji Fong
關鍵字: Preform;瓶胚;Bottle;Blow Molding;Biaxial Stretch;保特瓶;吹氣成形;二軸延伸
出版社: 機械工程學系
摘 要 PET保特瓶具有良好的物理性質、機械性質及氣密性質,廣受

Abstract PET bottles have very good physic, mechanical and
airtight properties. It has been a favorite product for
beverages packer and consumer. Because of PET''s low melt
viscosity, the process of making hollow bottles by extrude-
molding can not be used. The suitable process is injection
stretch blow molding. A preform is needed for stretch blow
molding. The preform was made by injection molding then
reheating before blow molding. Therefor, it should have preform
been designed for the blow molding. This research suggests
that the design of the preform should be divided into four
parts: thread, neck, body and bottom. The design criteria for
the preform are based on the requirements of bottle. The neck of
preform is designed based on the shoulder of the bottle. The
"Drawing Method" is developed in this research for the design of
preform according to the hoop stretch ratio, longitudinal
stretch ratio, and the shape of the bottle. The preform designed
by drawing method can stretch to the bottle as req
Appears in Collections:機械工程學系所

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