Two new metallocene linear MDPE rotomolding grades of 0.93 g/cc density reportedly can replace XLPE in many fuel-tank applications.
Two new metallocene linear MDPE rotomolding grades of 0.93 g/cc density reportedly can replace XLPE in many fuel-tank applications. Borecene Compact RM8346-9004 and RM8346-1000 from Borealis Polymers N.V. in Belgium provide molders with a high-flow micropellet that has better pourability than PE powders. (U.S. contact is Borealis Compounds, LLC, Murray, N.J.) The new resins are made with a patented technology that reportedly eliminates the need for pellet grinding and provides better filling of thin or complex automotive parts with improved detail definition in threads and other features. Borealis’ metallocene catalyst technology reportedly provides higher impact strength as well as superior color and appearance. RM8346-9004 black replaces grades RM8346 and RM8346RC. Its main application will be diesel fuel tanks, where its barrier performance is said to be superior to standard LLDPE and XLPE. Other potential uses are pipes and tanks for drinking water or agricultural chemicals. RM8346-1000 natural provides extra uv resistance. It has an ESCR of more than 500 hr. It replaces RM8343RC and is said to be suitable for diesel fuel tanks, toys, and marine applications.