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Statements

Subject Item
n2:RIV%2F70883521%3A28610%2F14%3A43871543%21RIV15-MSM-28610___
rdf:type
skos:Concept n10:Vysledek
dcterms:description
The effect of side stream channel height on flow stability in 30u coextrusion geometries was investigated. The studies were conducted on a Dow LD150R low density polyethylene melt using a single extruder to feed a flow cell in which the delivered melt stream was split before, and rejoined after, a divider plate in a slit die. Wave type interfacial instability occurred at critical stream thickness ratios. Reducing the side stream channel height broadened the layer ratio operating range before the onset of interfacial instability, therefore improving process stability. Stress fields were quantified and used to validate principal stress differences of numerically modelled flow. Stress field features promoting interfacial instability in each of the die geometries were identified. Interfacial instability resulted when the stress gradient across the interface was asymmetric and accompanied by a non-monotonic decay in the stress along the interface from its inception. The effect of side stream channel height on flow stability in 30u coextrusion geometries was investigated. The studies were conducted on a Dow LD150R low density polyethylene melt using a single extruder to feed a flow cell in which the delivered melt stream was split before, and rejoined after, a divider plate in a slit die. Wave type interfacial instability occurred at critical stream thickness ratios. Reducing the side stream channel height broadened the layer ratio operating range before the onset of interfacial instability, therefore improving process stability. Stress fields were quantified and used to validate principal stress differences of numerically modelled flow. Stress field features promoting interfacial instability in each of the die geometries were identified. Interfacial instability resulted when the stress gradient across the interface was asymmetric and accompanied by a non-monotonic decay in the stress along the interface from its inception.
dcterms:title
Influence of coextrusion die channel height on interfacial instability of low density polyethylene melt flow Influence of coextrusion die channel height on interfacial instability of low density polyethylene melt flow
skos:prefLabel
Influence of coextrusion die channel height on interfacial instability of low density polyethylene melt flow Influence of coextrusion die channel height on interfacial instability of low density polyethylene melt flow
skos:notation
RIV/70883521:28610/14:43871543!RIV15-MSM-28610___
n3:aktivita
n7:P
n3:aktivity
P(ED2.1.00/03.0111), P(GA103/09/2066)
n3:cisloPeriodika
1
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n17:9961070
n3:druhVysledku
n4:J
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
21352
n3:idVysledku
RIV/70883521:28610/14:43871543
n3:jazykVysledku
n19:eng
n3:klicovaSlova
Polyethylene; Modellin; Interfacial instabilities; Flow visualization; Coextrusion
n3:klicoveSlovo
n5:Flow%20visualization n5:Interfacial%20instabilities n5:Modellin n5:Coextrusion n5:Polyethylene
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[E9C72A16705E]
n3:nazevZdroje
Plastic Rubber & Composites
n3:obor
n16:CD
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n15:GA103%2F09%2F2066 n15:ED2.1.00%2F03.0111
n3:rokUplatneniVysledku
n13:2014
n3:svazekPeriodika
43
n3:tvurceVysledku
Zatloukal, Martin Martyn, Mike T. Coates, P. D.
n3:wos
000337125300004
s:issn
1465-8011
s:numberOfPages
7
n6:doi
10.1179/1743289813Y.0000000065
n18:organizacniJednotka
28610