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Experimental Investigations of LDPE Melt Flow in Coextrusion Geometries

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dc.title Experimental Investigations of LDPE Melt Flow in Coextrusion Geometries en
dc.contributor.author Martyn, Mike T.
dc.contributor.author Gough, Tim
dc.contributor.author Spares, Robert
dc.contributor.author Coates, Phil D.
dc.contributor.author Zatloukal, Martin
dc.relation.ispartof PLACE Conference and the Global Hot Melt Symposium
dc.identifier.isbn 1930657102
dc.date.issued 2003
dc.citation.spage 335
dc.citation.epage 359
dc.event.title 2003 PLACE Conference and the Global Hot Melt Symposium
dc.event.location Orlando, FL
utb.event.state-en United States
utb.event.state-cs Spojené státy americké
dc.event.sdate 2003-08-03
dc.event.edate 2003-08-07
dc.type conferenceObject
dc.language.iso en
dc.description.abstract The study of two low density polyethylene melt flows in slit coextrusion flow cells with 30° and 90° confluent geometries is presented. The stream flows and polymer-polymer interface in the confluent region and die land are observed through side windows of the cell. Birefringence and image processing techniques are used to quantify stress and velocity fields in the upstream and down stream melt flows. Interfacial instabilities were observed in the LDPE melt flows in both geometries. Instabilities occurred at certain stream mass flow ratios. Digital image processing shows the wave type extrudate instabilities have the same periodicity as perturbation in the flow field in the die land. A recently proposed "TNSD sign criterion" reasonably predicted the onset of the interfacial instabilities in these die geometries. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1005075
utb.identifier.rivid RIV/70883521:28110/03:63501616!RIV/2004/MSM/281104/N
utb.identifier.obdid 11553115
utb.identifier.scopus 2-s2.0-1142265455
utb.source d-scopus
dc.date.accessioned 2015-06-04T12:56:56Z
dc.date.available 2015-06-04T12:56:56Z
utb.contributor.internalauthor Zatloukal, Martin
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