A new endothermic/exothermic blended foaming agent is said to work in extrusion and injection of a variety of polymers, including PE, PS, PVC, and both thermoset and thermoplastic elastomers. Developed by Reedy International Corp., Keyport, N.J., Raz-85 foaming agent reportedly offers high gas yield at low use levels and uniform cell structure. Applications include footwear, building/construction, and automotive parts. A Canadian molder of HDPE patio furniture reportedly switched from using a straight azodicarbonamide exothermic agent to Raz-85 in an attempt to produce lighter foam density with no sinks. Part surfaces showed no pinholes and a desirable swirl surface that replicates wood. The endothermic component in the Raz-85 allowed for faster cooling with no cell collapse or concavity that occurred with the azo foaming agent. Moreover, the molder was able to reduce the level of foaming agent from 2% to 1.7%. (732) 264-1777 • www.reedyintl.com
Reedy International Corp.
25 E. Front St. Keyport, NJ 07735
Phone (732) 264-1777 Fax (732) 264-1189
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Multiblock polymer, when added in small amounts to a mix of the two otherwise incompatible polyolefins, creates a mechanically tough blend.