Chomerics creates EMI shield material
The Chomerics Division of Parker Hannifin Corp. has developed a lightweight electromagnetic-interference shielding material for high-temperature avionic and similar applications.
The Woburn, Mass.-based company says Premier PEI-140 maintains its high-temperature tolerance, chemical resistance and flame retardance for shielding levels up to 85 decibels. The product promises weight reduction in avionics end uses, and close tolerances for a tighter fit and improved sealing, according to Chomerics.
Polyetherimide is the base resin for the EMI shielding product. It is reinforced with a matrix of proprietary, conductive fillers. The reinforced material can withstand continuous use temperatures of up to 340° F, according to Chomerics.
Its properties mean Premier PEI-140 also is suited for applications in defense, medical, electronics and transportation.
Jemm-Trac keeping the web rolls turning
Jemmco LLC of Mequon, Wis., said its Jemm-Trac traction roll sleeve gives a tacky surface that will keep web rolls turning and prevent them from marking or scratching substrates.
By eliminating the need for tapes and cork, the roller coverings slide easily over existing idler rolls. There are no seams that will mark the substrate.
The sleeves are available in lengths up to 400 inches and can be cut to length to fit any idler.
Total touts new PS for tumblers, cutlery
Total Petrochemicals USA Inc. is introducing a high-flow, general-purpose polystyrene for cutlery, tumblers and similar high-speed injection molded goods.
CX5232 has improved stiffness compared with standard general-purpose PS materials, according to the Houston, Texas, company.
The material also has better flexural and tensile strength, higher Vicat temperature and reduced cycle time. The benefits allow processors to reduce part weight and perform quicker product changeovers.