New nylon 6 barrier materials from Rhodia Engineering Plastics, Cranbury, N.J., are aimed at monolayer and multilayer fuel tanks that meet new vapor emissions standards from the California Air Resources Board (CARB) and the U.S. EPA. The monolayer grade joins a growing number of barrier solutions that have been proposed to meet new emission rules for small off-road engine (SORE) fuel tanks for weed trimmers, leaf blowers, lawn mowers, tractors, and generators. Technyl C536XT is a blow moldable nylon 6 that reportedly imparts barrier properties via a unique molecular structure, says Gary Kachin, market development manager. In Europe, C536XT blow molded fuel tanks for mopeds and motorcycles achieve low permeability of 0.05 to 0.75 g/m2/day, which is well below the EPA target of 2.5g/m2/day. A 15-liter monolayer tank for an all-terrain vehicle approved for U.S. sale reportedly achieves permeation as low as 0.05 g/m2/day. Rhodia is developing other Technyl grades to replace EVOH in multilayer HDPE auto fuel tanks. These reportedly would reduce the number of layers in the structure from seven to five and cut the cost per tank by 10% because the nylon 6 doesn’t require tie layers to bond to HDPE. Rhodia is working closely with a Tier 1 supplier on a potential application. Technyl nylon grades are weldable, so injection molded two-piece tanks are possible. (609) 860-4000 • www.rhodia-ep.com
CN7500, Prospect Plains Road Cranbury, NJ 08512
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