How to increase the extrusion speed of ultra-high molecular weight PE
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This post was last edited by ljtjbx on 2016-6-1 at 10:57. Ultra-high molecular weight polyethylene is a thermoplastic engineering plastic with a linear structure and excellent overall properties; it is a polymer compound that boasts outstanding resistance to impact, wear, self-lubrication, chemical corrosion, and low temperatures. Due to its very high viscosity in the molten state—reaching 108 Pa·s—its flowability is extremely poor, and its melt index is almost zero, which makes processing and extrusion difficult. UHMW-PE resin has long molecular chains, which are prone to breaking under shear forces or to degradation when exposed to heat. Therefore, a lower processing temperature, a shorter processing time, and reduced shear on it are very necessary.
Can it exceed 100 degrees? What is the optimal temperature? 80-85 degrees?