Preform with internal barrier and internal layer of high thermal

Details Preform with internal barrier and internal layer of high thermal Preform with internal barrier and internal layer of high thermal

Filed on

1984-02-17

Date issued

1985-10-29

Examiner

Schofer, Joseph L.

Patent Class

Stock material or miscellaneous articles

SubClass

Hollow or container type article

SubSubClass

Polymer or resin containing

Other Related Categories

428412, 428522, 215 1C, 215 12R, 220415, 220453, 220468, B65D 2300

Type

Patent

Status

active

Patent number

045500436

Description

ABSTRACT:
This relates to providing a preform for use in blow molding containers which are suitable for use in conjunction with hot products which must be subjected to pasteurization. A preform is injection molded in stages and normally will have five layers including two interior barrier layers surrounding a central core. The core is to be formed of a thermoplastic having a high temperature thermal stability and is primarily selected from polycarbonates and acrylonitriles. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

REFERENCES:
patent: 4082854 (1978-04-01), Yamada et al.
patent: 4398642 (1983-08-01), Okudaira et al.
patent: 4399179 (1983-08-01), Minami et al.
patent: 4439493 (1984-03-01), Hein et al.

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