The Effect of Resin Type and Coextrusion Film Structure on Gloss Measured at Multiple Geometries and the Correlation to Human Perception, 2005 PLACE Conference

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A study was conducted to evaluate the effect of layer arrangement on the gloss of coextruded polyethylene blown films. Part 1 of this work examines the widely accepted preference for 45-degree gloss measurement within the plastic films industry by testing a series of polyethylene coextruded films at multiple angles of incidence, namely 20o, 45o, 60o and 85o. This research reveals that gloss-20 has the greatest sensitivity to change in coextruded film structure, gloss-45 and gloss-60 show good resolution between polyethylene films, gloss-60 provides the highest absolute values (with the exception of the low gloss film), and gloss-85 is ill-suited for providing resolution between samples. It also concludes that gloss-45 is a suitable choice for providing resolution between polyethylene blown films.

Part 2 of this paper explores the contribution to gloss-45 through varying the layer arrangement and layer composition in coextruded blown films. It is repeatedly demonstrated in this body of work that adding a high gloss polyethylene resin to a low gloss film has the ability to yield high overall gloss values. Furthermore, it is shown that a coextruded film with A/B/A construction has a higher gloss-45 value than an A/A/A film.

Author: McCormick, K., Arnould, G.
The Effect of Resin Type and Coextrusion Film
The Effect of Resin Type and Coextrusion Film Structure on Gloss Measured at Multiple Geometries and the Correlation to Human Perception, 2005 PLACE Conference
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