| Titre : |
Effect of introducing long chain branching on fiber diameter and fiber diameter distribution in melt blowing process of polypropylene |
| Type de document : |
texte imprimé |
| Auteurs : |
K. Iiba, Auteur ; W. Takarada, Auteur ; Takeshi Kikutani, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 403-409 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Extrusion filage
Mesure
Polymères ramifiés
Polypropylène
Procédé de fusion-soufflage (nontissés)
Procédés de fabrication par voie fondue (nontissés)
Rhéologie
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
In the melt blowing process, the molten polymers extruded from nozzles are elongated by high-velocity and high-temperature air flow. In this study, with the aim of stabilizing the melt blowing process for producing nonwoven webs with fine diameter fibers, the effect of the control of polymer rheology by the introduction of either low melt flow rate (MFR) polypropylene (PP) or long chain branched PP (LCB-PP) to regular high MFR PP was investigated. Introduction of low MFR PP into regular PP increased shear viscosity and fibers of larger diameter were produced in the melt blowing process, while introduction of low MFR LCB-PP suppressed the elongational viscosity reduction with the increase of strain rate, and eventually spinning was stabilized. It was found that the blending of an optimum amount of LCB-PP to regular PP caused the stabilization of the melt blowing process. As a result, the formation of nonwoven webs consisting of fine fibers of rather uniform diameter distribution could be achieved. |
| Note de contenu : |
- Experimental : Raw materials - Rheological measurements - Spinning equipment and conditions - Measurement of fiber diameter - Observation of fiber formation behavior - Measurement of specific surface area
- Results and discussion : Strain rate dependency of shear and elongational viscosity - Diameter of melt blown fibers - Observation of spinning-line - Specific surface area
- Table 1 : Sample polymers for melt blowing process
- Table 2 : Parameter of fiber diameter distribution calculated from fitted log-normal distribution curve. Values of the fitting parameters in equation 1 are also shown |
| DOI : |
https://doi.org/10.1515/ipp-2020-3922 |
| En ligne : |
https://drive.google.com/file/d/19WzVPEssiN-opvXNGkY74imxiOMO-sgY/view?usp=shari [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36713 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 4 (2021) . - p. 403-409
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