Three TPE compounds boast excellent processability, UV stability and appearance, as well as weight savings over EPDM and PVC in automotive window encapsulation and exterior appearance parts such as screen finishes and trim seals. Introduced at Fakuma 2014 by Teknor Apex, Pawtucket, R.I, the three compounds are based on different polymer chemistries.
Sarlink 17100 Series TPV compounds are reportedly improved, lower-viscosity formulations derived from the widely used Sarlink 4700 Series. Their high flow and low sensitivity to process variations allow for excellent surface properties and precise replication of complex shapes. As with all TPVs, the 17100 compounds maintain seal integrity at high temperatures, have high resistance to greases and solvents, and yield a low-gloss matte finish.
Sarlink ME-2500 and ME-2600 Series styrenic block copolymer (TPE-S) compounds are said to exhibit processing and end-use properties that surpass those of standard TPE-S materials, offering higher flow, enhanced surfaces, and greater UV stabilithy. While the ME-2500 compounds have densities comparable to EPDM, those in the ME-2600 Series are particularly low in density—0.93 g/cc vs. minimums of 1.1 of EPDM and 1.2 for PVC. All these compounds are said to have a broad processing window, easy to color, and exhibit high levels of UV stability. Gloss levels can be custom adjusted.
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