| Titre : |
Enhancement of heat seal properties of polypropylene films by elastomer incorporation |
| Type de document : |
texte imprimé |
| Auteurs : |
R. Boutrouka, Auteur ; S. H. Tabatabaei, Auteur ; Abdellah Ajji, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 322-326 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse thermique
Copolymères
Elastomères
Films plastiques
Matières plastiques -- Extrusion
Matières plastiques -- Soudage
Polypropylène
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Seal strength at high and low temperatures as well as the width of the heat sealing temperature range are important properties in packaging industry. In addition, for sterilisable and retort applications, having those properties at elevated temperatures is crucial. Polypropylenes (PP) are usually used for these applications, however, the sealing temperatures are too high and the temperature range for the seal process is narrow, thus blending with a PP elastomer copolymer can be an alternative. In this study, hot-tack and heat seal properties were determined for a homo-polypropylene, a random co-polypropylene and an elastomer co-polypropylene based films and their blends. It is found that the seal initiation temperature (for hot tack and heat seal) is governed by the melting temperature and crystallinity and the increase of the elastomer content in the blends leads to a decrease of the seal initiation temperature. It is also shown that the sealing force depends on the ease of chains diffusion across the sealing interface. Finally, it was found that the strength of the heat sealing increases by recrystallization in the sealing interface after cooling. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Films co-extrusion - Thermal analysis - Heat seal testing
- RESULTS AND DISCUSSION : Hot-tack |
| DOI : |
10.3139/217.3523 |
| En ligne : |
https://drive.google.com/file/d/1goIWee-_8-72Jgs3Xvtxy62g1OyWcYg3/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30800 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 3 (07/2018) . - p. 322-326
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