Single-layer polyacetal tank meets latest fuel permeation regulations

Düsseldorf — Beefed-up regulations governing fuel permeation from small offroad engine tanks used in such products as lawn mowers and recreational vehicles has seen a flurry of development in plastic-based solutions, sometimes involving multilayer blowmolded constructions, and other times surface treatment (fluorination) of high-density polyethylene (HDPE) single-layer constructions. Now, Celanese (6/A07/B07) has developed a polyacetal (POM) resin that can meet the latest EPA and CARB standards in a single-layer, untreated tank. The barrier properties are intrinsic to the resin.