A new series of PP-based TPVs features a proprietary cure technology that reportedly provides extremely high flow. NexPrene 9500 SHF grades from Solvay Engineered Polymers Inc., Auburn Hills, Mich., are said to be 40% to 60% less viscous than conventional TPVs. As a result, injection molding cycles can be up to 15% faster, says Solvay. The six new grades can be processed at temperatures up to 500 F. They range in hardness from 55 to 85 Shore A and are non-hygroscopic, requiring no predrying. Surface aesthetics are superior to those of conventional TPVs. A targeted application is automotive window encapsulation, which typically requires lower molding temperature (375 to 475 F) and lower pressure to avoid glass breakage. The new materials are also suitable for very long and/or thin parts.
LyondellBasell Advanced Polyolefins
1200 Harmon Rd. Auburn Hills, MI 48326
Phone (248) 391-9500 Fax (248) 391-9501