Parison for repeated use bottle - designed with specified cross=section and diameter to length ratio

摘要

A parison for the blow moulding of bottles for repeated use, contg. carbonated beverages, made of transparent plastic such as polyethylene terephthalate has a throat angle of 3-45 degrees and a max. cross-section of the rump of 5-9 cm2. The normal outside rump dia. is 40 to 50 mm and the ratio of dia. to length is 1:3 to 1:4.5. Such a parison contains more material than conventional types. This material is distributed in such a way that the transparency is not impaired and the bottle has enough stability for repeated use.