A new nylon nanocomposite is offered as a monolayer solution for small fuel tanks and hoses that are now required to meet more stringent fuel-permeation requirements from the State of California and the U.S. EPA. NanoSeal nylon from Nylon Corp. of America Inc. (Nycoa), Manchester, N.H., is based on a proprietary nylon copolymer and incorporates nanoclay platelets that act as a barrier, creating a tortuous path for liquid or vapor to penetrate. The nanocomposite is claimed to be a cost-effective alternative to multilayer HDPE/EVOH structures or fluorination. Fuel permeation is reduced up to 97% compared with monolayer HDPE and 40% versus neat nylon 6. The "super-tough" material also meets low-temperature impact requirements. Several injection and blow molded fuel tanks are being evaluated for small off-road vehicles, lawnmowers, and snowmobiles. One example is a 3-gal tank for a riding mower that is blow molded by Comfer Plastics, Tonawanda, N.Y.
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