Rubber/plastic co-extrusion

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

B - Operations, Transporting

32

B

B32B 25/08 (2006.01) B29C 35/08 (2006.01) B29C 47/06 (2006.01) B32B 25/16 (2006.01) B32B 27/30 (2006.01) B32B 37/00 (2006.01) B60J 10/00 (2006.01) B29C 35/02 (2006.01)

Patent

CA 2091221

Abstract of the Disclosure 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. 462\21867ABB.20A

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