Teknor Apex launches TPE-S moulding compounds for auto windows

PAWTUCKET, U.S.A. – A new series of styrenic thermoplastic elastomer (TPE-S) injection moulding compounds  for Teknor Apex Company provides automotive makers with processing features that are superior to those of TPE-S materials currently used for window encapsulation. 

Under the brandname, Sarlink? ME-2600 Series are 55-, 65-, and 75-Shore A compounds that have low specific gravities of 0.93 to 0.94. These specific gravities are comparable to those of TPE-S grades now used in window encapsulation but lower than those of PVC and EPDM, which typically exceed 1.10. Compared to the existing TPE-S materials, the new Sarlink ME-2600 compounds yield higher flow, enhanced surface appearance, improved tensile properties, and greater stability upon heat aging and UV exposure.

Currently, Teknor Apex can manufacture the Sarlink ME-2600 compounds at its facilities in the U.S., Europe, and Singapore. According to Jeff Dickerhoof, senior transportation market manager for the Thermoplastic Elastomer Division of Teknor Apex, the new compounds can be a good alternative in the North American market where there is a need for a regionally-based manufacturer of TPE-S compounds for window sealing applications to meet the requirements of OEMs. Sarlink ME-2600 compounds provides ideal options because of the low specific gravity of these materials compared to EPDM or PVC and enables weight reduction to meet the stricter emissions and fuel-efficiency standards anticipated for the U.S. market. To date, Sarlink ME-2600 compounds are being evaluated for rear side window encapsulation uses in 2016 models to be built in North America.

Based on proprietary styrene block copolymer (SBC) chemistry, the Sarlink ME-2600 compounds are part of the new series of TPE-S elastomers added to the Sarlink product range, which traditionally has consisted solely of thermoplastic vulcanisates (TPVs). Other TPE-S series include high-performance and general-purpose extrusion compounds and injection molding grades for exterior trim, interior components, active grille shutters, and under-hood parts.