WEB EXCLUSIVE A new family of polypropylene-based TPVs is claimed to be the first to bond to nylon in cold-insert overmolding. Santoprene B500 TPV from ExxonMobil Chemical, Santoprene Specialty Products, Akron, Ohio, is formulated to permit insert overmolding of cooled parts that were molded separately in another press. Previously, two-shot injection molding in the same press was the only method to bond TPV to nylon because the first shot had to remain hot to achieve good bonding. Applications include power tools, kitchen utensils, automotive parts, furniture, and sporting goods. The exceptional cohesive bond strength of B500 permits overmolds as thin as 0.5 mm, vs. a minimum of 1.5 mm for the previous grade. The new grades also can be used in two-shot injection molding. Hardnesses of 60 and 70 Shore A are available in colors or black. (800) 305-8070 * www.santoprene.com
ExxonMobil Chemical Co.
Santoprene Specialty Div.
388 South Main St. Akron, OH 44311-1059
Phone (330) 849-5000 Fax (330) 849-5599