| Titre : |
Investigation of bubble instabilities in film blowing process |
| Type de document : |
texte imprimé |
| Auteurs : |
J. Laffargue, Auteur ; L. Parent, Auteur ; P. G. Lafleur, Auteur ; P. J. Carreau, Auteur ; Y. Demay, Auteur ; Jean-François Agassant, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 347-353 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
This paper describes an original on-line video device developed in order to study bubble instabilities occurring in the film blowing process, taking into account their three-dimensional behavior. For a linear low-density polyethylene, two forms of instabilities and combination have been observed : draw resonance and helical instability. These instabilities could be quantitatively described and differences in behavior could be assessed using real objective measurements and criteria. The influence of key processing conditions was investigated and the results showed that the instabilities are enhanced by increasing the draw ratio, blow up ratio and frost line height. These first results are in agreement with the majority of the results reported in the literature, but allow for a more accurate analysis of the phenomena. |
| Note de contenu : |
- EXPERIMENTAL : The film blowing unit - On-line measurements
- TYPICAL EXAMPLES : Stable bubble - Draw resonance instability - Helical instabilities
- PRIMARY RESULTS : Objectives - Low FLH - High FLH - Construction of bubble stability map |
| DOI : |
10.3139/217.1704 |
| En ligne : |
https://drive.google.com/file/d/1eUnHlunNemzsRduWllrIyGWzJa2MxID9/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16038 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XVII, N° 4 (12/2002) . - p. 347-353
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