System and method for creating high gloss plastic items via the use of styrenic copolymers as a coextruded layer

摘要

The present techniques provide multi-layer plastic structures and methods for making such. The multi-layer plastic structures include an inner surface made from a polyolefin resin, and resistant to environmental stress cracking, and an outer surface that includes a styrenic copolymer. The outer surface has a kinetic coefficient of friction with itself of 0.42 and a static coefficient of friction with itself of 0.44.

主权项

1. A method of manufacturing a multilayer plastic container, comprising:
melting a first material in a first extruder to form a first melt, wherein the first material comprises a high density polyethylene; melting a second material in a second extruder to form a second melt, wherein the second material comprises a styrene butadiene copolymer comprising greater than about 50% styrenic monomer, by weight, and the second material does not include a static coefficient of friction-affecting additive; melting a third material in a third extruder to form a third melt, wherein the third material comprises a blend of the first material and the second material; and combining the first melt, the second melt, and the third melt in a coextrusion die to form the multilayer plastic container, wherein the second material forms an outer surface of the multilayer plastic container such that a static coefficient of friction between the outer surface of the multilayer plastic container and another article of manufacture having a corresponding outer surface formed from the second material is less than 0.44 to discourage binding between the multilayer plastic container and the other article of manufacture, and wherein the third melt is disposed in a layer between the first melt and the second melt.