Injection blow molding pet products

Details Injection blow molding pet products Injection blow molding pet products

1980-08-27

1982-10-26

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264520, B29C 1707

Patent

active

043561420

ABSTRACT:
Method for injection blow molding transparent hollow objects from a polyethylene terephthalate melt comprises molding from a melt at 530.degree.-575.degree. F. into a parison, quickly and relatively uniformly cooled by parison mold elements, at 75.degree.-150.degree. F., to a temperature above the glass transition temperature of the melt. The parison is then immediately blown and cooled to temperature below the softening point of the melt, all in a manner to avoid crystallization and to produce a hollow PET object, typically a clear bottle.

REFERENCES:
patent: 3822332 (1974-07-01), Hrach et al.

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