Evaluation of critical process parameter on the production of sustainable bead foams based on polylactic acid

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008750
URN to cite this document: urn:nbn:de:bvb:703-epub-8750-7

Title data

Brütting, Christian ; Ruckdäschel, Holger ; Klotz, Sarah:
Evaluation of critical process parameter on the production of sustainable bead foams based on polylactic acid.
In: Journal of Cellular Plastics. Vol. 61 (2025) Issue 1 . - pp. 21-35.
ISSN 1530-7999
DOI der Verlagsversion: https://doi.org/10.1177/0021955X241281672

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Abstract

A commercial grade of polylactic acid (PLA) was foamed without using modifiers to obtain expanded polylactic acid bead foams (EPLA). Typically, the foaming process is influenced by both melt properties and crystallization behavior. While factors like water temperature, die structure, and die temperature are known to have effects on bead foam processing, these aspects have not been thoroughly explored in the context of PLA bead foam production. To address this gap, a comprehensive investigation was undertaken, varying water temperature, die structure, and die temperature to discern their impact on PLA processing behavior. Results revealed that water temperature significantly influenced foaming behavior, particularly at elevated temperatures near the glass transition of PLA. Additionally, the study demonstrated that die size wielded a notable influence on all foam properties, dictating process limits. With the selection of an appropriate die size, the die temperature could be manipulated within the range of 190°C to 160°C, revealing a substantial impact on the overall process. Remarkably, the lowest densities achieved were 63 kg/m3 with an average cell size of 36 µm and a cell density of 1.1*107 cells per cm3.

Further data

Item Type:	Article in a journal
DDC Subjects:	600 Technology, medicine, applied sciences
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Polymer Materials Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI) Faculties Research Institutions Research Institutions > Affiliated Institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8750-7
Date Deposited:	12 Dec 2025 09:57
Last Modified:	15 Dec 2025 08:50
URI:	https://epub.uni-bayreuth.de/id/eprint/8750

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