A new series of styrenic thermoplastic elastomer (TPE-S) injection molding compounds provides automotive manufacturers with processing and end use properties that are superior to those of TPE-S materials currently used for window encapsulation, says the supplier Teknor Apex Company (Pawtucket, RI).
The Sarlink ME-2600 Series includes 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 existing TPE-S materials, the new Sarlink ME-2600 compounds provide higher flow, enhanced surface appearance, improved tensile properties, and greater stability upon heat aging and UV exposure," says the supplier. For example the 65-Shore A grade (ME-2655) possesses tensile strength of 6 MPa, tear strength of 18 kN/m, and ultimate elongation of 500%.
Teknor Apex can manufacture the Sarlink ME-2600 compounds at its facilities in the U.S., Europe, and Singapore. Sarlink ME-2600 compounds are being evaluated for rear side window encapsulation uses in 2016 models to be built in North America.