Coinjection molding of decorative preforms and containers produc

Details Coinjection molding of decorative preforms and containers produc Coinjection molding of decorative preforms and containers produc

1995-12-14

1997-01-21

Ryan, Patrick

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 79, 428120, 428121, 428122, 428126, 428192, 428412, 4285428, 264255, 2642972, 2643284, 2643288, 26432814, 26432815, 26432816, 26432819, 264401, 264513, 425130, 425560, B32B 900

Patent

active

055957994

ABSTRACT:
A process for injection molding a multi-colored article in an injection mold, in which a) a desired initial quantity of a first-colored material is metered to a first desired portion of the cavity; b) a desired quantity of a second-colored material is supplied to the cavity, contiguously with the first-colored material, and is metered to a second desired portion of the cavity. The location of the first and second desired portions within in the cavity being controlled by providing the first and second-colored materials with appropriate melt viscosities and controlling the temperature and rate of supply of the first and second-colored materials. A multi-colored preform formed by the process that is suitable for blow molding a multi-colored container, and a multi-colored container blow molded from such a preform are also provided.

REFERENCES:
patent: 4550043 (1985-10-01), Beck
patent: 4863665 (1989-09-01), Schad et al.
patent: 4931234 (1990-06-01), Schad et al.
patent: 5040963 (1991-08-01), Beck et al.
patent: 5143733 (1992-09-01), Von Buren et al.
patent: 5221507 (1993-06-01), Beck et al.

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