Melt tearing and ovality in wire coating

Autor:	Aaron J. Hade, A. Jeffrey Giacomin
Rok vydání:	2000
Předmět:	Materials science Polymers and Plastics General Chemistry engineering.material Isothermal process Stress (mechanics) Draw ratio Coating Ovality Tearing Materials Chemistry engineering Newtonian fluid Forensic engineering Tube (fluid conveyance) sense organs Composite material
Zdroj:	Polymer Engineering & Science. 40:1862-1869
ISSN:	1548-2634 0032-3888
DOI:	10.1002/pen.11318
Popis:	We investigate how to avoid tearing, egg-shaped cross sections or foldover of the polymer melt cone in tube coating of wire. We use an isothermal Newtonian model for the melt cone. We calculate the melt stress and the draw ratio balance, the parameter used in industry to avoid process problems. The stress calculations help us explain ovality and tearing. To help practitioners apply the results we provide examples.
Databáze:	OpenAIRE
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