Abstract: Molded parts exhibiting enhanced resistance to high temperature diesel fuel and improved tensile modulus are provided. The molded parts are made from a composition comprising from 85 to 99.8% by weight of a polyoxymethylene copolymer, and from 0.2 to 15% by weight magnesium hydroxide. The molded parts may further include from 0.01 to 5% by weight of a component selected from the group of amidine compounds and metal oxides. The amidine compound may be cyanoguanidine and the metal oxide may be magnesium oxide. The molded part exhibit reduced weight loss when exposed to diesel fuel at a temperature of at least about 60° C. during use.

Abstract: Solidified hollow, preferably long blow molded, articles made from at least one thermoplastic composition comprising short aramid fibers. Processes and compositions for making such articles. Methods of improving the melt strength of polymer compositions by introducing therein an effective amount of short aramid fibers. Methods of making blow molded articles from polymer compositions not suited for blow molding.