At this month’s Fakuma show in Germany, Wacker Chemie AG (parent of Wacker Chemical Corp., Adrian, Mich.) will introduce two new liquid silicone rubber grades that achieve UL 94V-0 flammability rating without abrasive fillers. Compared with other highly flame-retardant LSR grades, which contain fillers like quartz, Elastosil LR 3011/50 FR and LR 3170/40 contain special non-abrasive inert fillers that are said to cause considerably less mold fouling and wear. The two new grades are aimed at LED fittings for flat-screen monitors, axial and radial seals in connection sockets, and single-wire seals for solar collector housings. Also, electrically powered vehicles require increased flame-resistance for their components. Elastosil LR 3011/50 has around 50 Shore A hardness. Elastosil LR 3170/40 has 44A hardness and is a self-bonding grade for hard/soft overmolding onto aluminum and certain flame-retardant nylons. No surface priming or pretreatment is necessary.
Editor PickAdvances in Molding, 3D Printing At Arburg ‘Technology Days’
Over 6700 visitors saw more than 50 working machinery exhibits highlighting automation, connectivity, and sophisticated processing.