Cyclics Corp. says it has an executive order from the California Air Resources Board. The order exempts fuel tank rotomolders from expensive fuel permeation testing when they certify the use of Cyclics' polybutylene terephthalate in tank production.
Cyclics of Schenectady, N.Y., has developed a way of making two-layer fuel tanks for engines with displacements greater than 80 cubic centimeters but with less power than 25 horsepower. Cyclics claims its method surpasses CARB's standard that mandates permeation of less than 1.5 grams per square meter per day at 104° F. On existing rotational molding equipment a dual-layer fuel tank can be made in a one-step process when CBT pellets are added to the mold with linear polyethylene powder. CBT resin forms an inner layer that boosts permeability protection.
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