Rubber/plastic co-extrusion

Details Rubber/plastic co-extrusion Rubber/plastic co-extrusion

1992-04-23

1994-08-02

Buffalow, Edith

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

15624411, 428521, B32B 2708

Patent

active

053344588

ABSTRACT:
The present invention provides a non-rusting unitary co-extruded article, which may be used for a variety of purposes, including a seal. The co-extruded article is comprised of at least two dissimilar discrete parts such as a rubber component, referred to herein as the "rubber extrudate," and a thermoplastic component, referred to herein as the "plastic extrudate." A particular advantage of the invention is that the rubber extrudate and thermoplastic extrudate are cohesively joined at their interface. By cohesively joined, it is meant that the two extrudates stick together tightly without the necessity of a separate adhesive. Where hardness is desired of the thermoplastic extrudate, ethylene vinyl acetate is generally preferred. Where a seal is desired, the rubber extrudate comprises ethylene propylene diene rubber, which provides a suitable seal. The invention also relates to a method for making the same.

REFERENCES:
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patent: 5013379 (1991-05-01), Brooks et al.
patent: 5135797 (1992-08-01), Sasaki
1991 Annual Report, Magna International, Inc., exact publication date not clear; after Sep. 23, 1991.

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