Process for producing molded article of continuous length

Details Process for producing molded article of continuous length Process for producing molded article of continuous length

1992-02-26

1994-02-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264237, 2642972, 26432814, 264346, 264348, 425445, B29C 7102, B29C 4572

Patent

active

052884503

ABSTRACT:
A process for dimensionally stabilizing an article molded from a synthetic resin material, such as PVC. The molded article is subjected to a first cooling treatment to cool the article at a temperature lower than the glass transition temperature Tg of the synthetic resin followed by a heating treatment at a temperature higher than the glass transition temperature Tg and then is subjected to a second cooling treatment again at a temperature lower than the glass transition temperature Tg. Following such treatment steps, the molded article, such as side molding for automobiles, have less variation in dimensions and less shrinkage after molding in use.

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patent: 4450133 (1984-05-01), Cafarelli
patent: 4777001 (1988-10-01), Kobayashi et al.
patent: 4911873 (1990-03-01), Kuzuya et al.
Co-pending U.S. Application No. 07/826,612.

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