Polymax has developed a thermoplastic elastomer that it claims outperforms thermoplastic vulcanizate elastomers in weather seals.
Its new D6940 TPE grade provides higher tear strength, lower compression set and cost benefits compared with TPVs, the Waukegan, Ill., company says. The product is well suited to weather seals in window sealing and telecom box sealing, where it meets growing demand for softer TPEs.
D6940 “achieves our goal of a higher tear strength elastomer with low compression set at hardness levels down to 40 Shore A,” said Tom Castile, Polymax vice president of sales, in a news release.
Polymax says the new elastomer extends its weather seal product line that includes materials with hardness ranging from Shore A 40 to 90. High tear strength, low deformation, low-temperature toughness, cost effectiveness and ability to be extruded without drying have spurred acceptance of the TPEs in weather sealing, the company explains.
“Although targeted as cost benefit alternatives to TPV elastomers, these products also provide a significant improvement in cold temperature toughness vs. flexible PVC in the window and door seals,” added Ron Sheu, Polymax vice president of new business development.
Polymax can produce weather seal TPEs at its Waukegan facility near Chicago, as well as in Nantong, China.