A family of HDPE resins boasts improved resistance to bio-diesel fuels and is poised for use by makers of automotive fuel tanks. Newly available from Basell North America, Inc., a LyondellBasell company, Wilmington, Del., are Lupolen HDPE grades 4261AG BD for blow molding and 4261A IM BD for injection molding. Tests on blow molded and injection molded parts show significantly increased chemical resistance to bio-diesel fuels compared with current HDPE grades used in fuel tanks, according to Thomas Lindner, technical manager for automotive fluid systems. After 1500 hr of contact with 100% bio-diesel fuel, intrinsic viscosity of the new HDPEs changes by 1.7%, which is nearly 30 times better than standard HDPE. Actual tanks have been exposed to bio-diesel at 40 C for 11 years. The two new Lupolen grades reportedly maintain their physical and chemical properties better than Basell’s standard Lupolen 4261A products. The new resins have the same melt viscosity as 4261A, so existing molds and machinery are expected to require no modification. For property data, visit www.ptonline.com/plaspec. (302) 683-8000 • www.lyondellbasell.com
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