| Titre : |
Flow analyses in a spiral mandrel die assuming wall slip |
| Type de document : |
texte imprimé |
| Auteurs : |
H. Higuchi, Auteur ; K. Koyama, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 349-355 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
It is often observed in industrial practice that the thickness uniformity of blown film obtained with a given die varies with the type of polymer. We have shown in previous works the importance of the wall slip of polymer melt in the film uniformity. Currently available models of polymer melt flow through spiral mandrel dies neglect the wall slip. The present work considers the slip in flow analyses and predicts the effects of rheological properties on the uniformity; the decreases in melt viscosity and wall slip and the increases in shear thinning and the stress dependence of wall slip reduce the uniformity. The predictions agree well with the experimental results obtained in our previous studies. |
| Note de contenu : |
- FLOW ANALYSES : Basic ideas - Polymer flow model - Processing data for computation
- RESULTS AND DISCUSSION : Flow distibution at spiral end zone - Effect of rheological properties on flow distribution - Effects of flow rate on flow distribution - Can die design eliminate effect of wall slip on flow distribution ? - Comparison of flow analyses with experiments |
| DOI : |
10.3139/217.1783 |
| En ligne : |
https://drive.google.com/file/d/1fyerunO-PM32w300uedjlOngbz3zBt_X/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15817 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XVIII, N° 4 (12/2003) . - p. 349-355
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Flow analyses in a spiral mandrel die assuming wall slip in INTERNATIONAL POLYMER PROCESSING, Vol. XVIII, N° 4 (12/2003)
