Numerical study on mixing performance of glass fiber dispersion in a twin-screw extruder with backward-mixing elements

Kunihiro Hirata, Hiroshi Ishida, Motohiro Hiragori, Yasuya Nakayama, Toshihisa Kajiwara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the kneading of glass-fiber-reinforced plastics by twin-screw extrusion, the use of a backward-mixing screw (BMS) element for melt mixing has been found to be effective in dispersing glass-fiber bundles. In this study, we use the computational fluid dynamics (CFD) to study the mechanism of dispersion by a BMS element for glass fiber bundles. The result of CFD for a BMS and a forward kneading disk (FKD) reveals that the melt mixing by a BMS is highly effective to act the required stress on overall resin. In addition, there is a good correlation between the incidence of undispersed glass-fiber bundles measured experimentally and the minimum value of distribution of the time-integrated stress calculated numerically. On the basis of the above results, we propose a method to predict the operating conditions in which the incident probability of undispersed glass-fiber bundles and thermal degradation are controlled.

Original languageEnglish
Title of host publicationProceedings of PPS-30
Subtitle of host publicationThe 30th International Conference of the Polymer Processing Society - Conference Papers
EditorsSadhan C. Jana
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413092
DOIs
Publication statusPublished - May 22 2015
Event30th International Conference of the Polymer Processing Society, PPS 2014 - Cleveland, United States
Duration: Jun 6 2014Jun 12 2014

Publication series

NameAIP Conference Proceedings
Volume1664
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other30th International Conference of the Polymer Processing Society, PPS 2014
CountryUnited States
CityCleveland
Period6/6/146/12/14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Numerical study on mixing performance of glass fiber dispersion in a twin-screw extruder with backward-mixing elements'. Together they form a unique fingerprint.

  • Cite this

    Hirata, K., Ishida, H., Hiragori, M., Nakayama, Y., & Kajiwara, T. (2015). Numerical study on mixing performance of glass fiber dispersion in a twin-screw extruder with backward-mixing elements. In S. C. Jana (Ed.), Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers [200091] (AIP Conference Proceedings; Vol. 1664). American Institute of Physics Inc.. https://doi.org/10.1063/1.4918389