THICKNESS VARIATION IN COEXTRUDED LAYERS - EFFECT OF POLYMER VISCOELASTICITY ON LAYER UNIFORMITY

Authors
DOOLEY J HUGHES K
Citation
J. Dooley et K. Hughes, THICKNESS VARIATION IN COEXTRUDED LAYERS - EFFECT OF POLYMER VISCOELASTICITY ON LAYER UNIFORMITY, Tappi journal, 79(4), 1996, pp. 235-241
Citations number
19
Categorie Soggetti
Materials Science, Paper & Wood
Journal title
Tappi journal → ACNP
ISSN journal
07341415
Volume
79
Issue
4
Year of publication
1996
Pages
235 - 241
Database
ISI
SICI code
0734-1415(1996)79:4<235:TVICL->2.0.ZU;2-B
Abstract
The effect of polymer viscoelasticity on the uniformity of layer thick ness within multilayer coextruded structures was investigated. The stu dy was carried out using a unique feedblock that produces a coextruded structure consisting of an array of 49 individual polymer strands (7 rows x 7 columns) embedded within a polymer matrix. The strands trace the flow paths within different types of dies and provide information about the movement within a flowing viscoelastic polymer stream.