Use of Polymer Processing Additives to Improve Melt Processing of m-LLDPE Extrusion, 2001 Polymers Laminations & Coatings Conference Proceedings
S. E. Amos, K. R. Slusarz--There is a large body of work showing that the addition of polymer processing additives (PPAs) results in an improvement in the processing performance of polymers. Some of the processing improvements that have been observed include a reduction in melt fracture, pressure, die build- up, and gels along with an increased processing window and improved surface finishes. Previous papers have shown the addition of a PPA has reduced many types of gels that result from cross- linking, oxidization, and unmelted material. This paper will investigate the reduction of unmelt gels seen with the addition of PPA to a polyolefin plastomer (POP) and will infer the mechanism of how the coating of the PPA on the extrusion barrel reduces the unmelt gels. In addition to the mechanism this paper will evaluate the different methods of adding the PPA to the extrusion system.
Use of Polymer Processing Additives to Improve Melt Processing of m-LLDPE Extrusion, 2001 Polymers L