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3 rubbers (FVMQ). Fluorosilicones are widely used in automotive applications where excellent low temperature flexibility in combination with exposure to fuels, oils, blow-by-gas, or hot air is required.
Additionally, Momentive has also developed the oil-bleeding fluorosilicone within the new FFSL family. Typical applications are for wire harnesses and electrical connectors in potential contact with above critical media. This oil, bleeding out of the moulded parts reduces forces for assembly and disassembly of cables and metal clamps, and helps to protect the seals from potential damage.
The materials are being launched with products ranging in hardness from 40 to 70Shore A. "We are targeting the automotive mass production applications in contact with fuels, oils or blow-by-gas," says Oliver Franssen, Industry Manager, Automotive Elastomers, Momentive Performance Materials. "Therefore, we need a family of products, such as 40Shore A for oil bleeding FFSL for connectors, a 70Shore A product for O-Rings and 50 to 60Shore products for membranes, seals and gaskets. Within those application area's, the FFSLs should demonstrate cost efficiency through their productivity gain and at the same time will help increase the engineers' design freedom for multi-component parts."
Production trials have been carried out on different machines with different massproduction moulds and cold runners with up to 64 cavities in a fully automated process. Processing of the new FFSL material is comparable to standard LSR grades.
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