POM offers barrier properties similar to EVOH

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May 9, 2008 - Ultraform® E3120 BM polyoxymethylene (POM) copolymer resin from BASF AG, Ludwigshafen, Germany, exhibits barrier properties equivalent to ethylene vinyl alcohol (EVOH). Stiffness, toughness, barrier properties make extrusion blowmolded POM potential replacement for glass or metal containers alone or as barrier layer in multilayer structure. Ultraform E3120 BM POM offers high melt stiffness, processes/dyes easily, accurately replicates mold surfaces, resists alcohol, oil, hydrocarbons, withstands steam sterilization. Optimized crystallization behavior results in wide processing window, simplifies automation of blowmolding process. High stretchability of translucent resin permits production of thin-walled containers. Although no commercial packaging applications exist at this point, most likely first use is for aerosol container. Other possibilities include bottles for products like nail polish removers, cosmetics, cans for solvents/paints as well as barrier layer in coextruded film. Evaluations continue to determine acceptability for food contact. Classified as engineering resin in acetal family, POM, costs more than polyolefins, is most often seen in automotive, industrial applications.
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