Biaxially-stretch-blow-molded container having excellent heat re

Details Biaxially-stretch-blow-molded container having excellent heat re Biaxially-stretch-blow-molded container having excellent heat re

1995-05-16

1996-12-17

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264530, 264903, 264906, 425526, B29C 4918

Patent

active

055850650

ABSTRACT:
A biaxially-stretch-blow-molded container and a method of producing the same. Redraw ratio at the bottom portion is small in the secondary blow molding without employing a complex heating system but in which a secondary article obtained by subjecting a preform article to the primary blow molding is preferentially shrunk at its bottom portion, and a tertiary article or a quaternally article before being subjected to the secondary blow molding is obtained having a bottom of a flat shape or in which the central portion is recessed inwardly of the container and the periphery thereof is flattened. The bottle obtained by this method has a thickness and crystallinity in the bottom portion which are nearly the same as those of the center of the barrel and are highly oriented. The heat-resistant bottle exhibits excellent strength in the bottom portion and symmetrical panel-sinking stability in the vacuum pressure.

REFERENCES:
patent: 4035455 (1977-07-01), Rosenkranz et al.
patent: 4496517 (1985-01-01), Kinoshita et al.
patent: 5261545 (1993-11-01), Ota et al.
patent: 5308233 (1994-05-01), Denis et al.
patent: 5378421 (1995-01-01), Salame
patent: 5389332 (1995-02-01), Amari et al.

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