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Susan S. Woods, Rick E. King III, Claude Lavallée--Polymer Process Aids (PPA) are used to improve the melt extrusion of polyolefins. Hindered Amine Light Stabilizers (HALS) are used to prolong their ultra-violet (UV) stability in outdoor applications. These two types of additives are often used together in linear low density polyethylene (LLDPE) blown film applications where melt fracture free films with good UV stability are needed: for example in agricultural films and some heavy duty shipping sacks. The potential interaction between PPA and some HALS has been examined previously 1 . This paper builds on that earlier work and looks at new HALS products developed specifically for markets where attempts to minimize the potential interaction between PPA and HALS has been explored.
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Influence of Polymer Process Aid and Hindered Amine Light Stabilizer Combinations in LLDPE Blown Fil
