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01/07/2006
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ExxonMobil Chemical has developed two Santoprene thermoplastic vulcanizate (TPV) grades for automotive weatherseal applications.
One adheres to thermoplastic elastomer (TPE) systems and to existing EPDM rubber profiles. The grade has been designed primarily for glass run channel corner moulding applications that require a low coefficient of friction. Exhibiting a level of bond strength and compression set to provide good sealing performance, the grade has good melt flow properties to produce a glossy, smooth finish. The grade eliminates the need for a secondary coating often applied to corner moulds. It is available in a hardness of either 70 Shore A or 80 Shore A.
A second new grade allows the finish of a part to be matched to car components made from different thermoplastic or rubber materials. Through tooling, the appearance of the part can be adjusted to match a glossy, shiny or matt look. Used for moulded weatherseals where visual aspect is important, the grade is highly suited to injection moulding, particularly for complex part geometries. It also has good sealing performance, high flow characteristics for smooth surfaces, excellent elastic recovery, minimal part warping and the ability to bond.
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Author
Roger Bishop
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Copyright European Automotive Design.
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