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Erschienen in: International Journal of Plastics Technology 2/2017

28.10.2017 | Research Article

Improvements on the tensile properties of microcellular injection molded parts using microcellular co-injection molding with the material combinations of PP and PP-GF

verfasst von: Edward Suhartono, Shia-Chung Chen, Kuan-Hua Lee, Kuo-Jui Wang

Erschienen in: International Journal of Plastics Technology | Ausgabe 2/2017

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Abstract

One of the drawbacks of microcellular injection molded parts is lower part tensile strength and stiffness than solid parts. This is caused by a reduction in the effective cross-section area as the microcellular structure is generated inside the part. This study investigated how microcellular co-injection molding can add a solid skin layer, encapsulating the foamed core layer, to increase both part strength and stiffness. In addition to PP, PP-GF (10-wt% GF) was used for the reinforcing effect. The experiment used constant injection parameters and varied material combinations, and conventional, MuCell, and co-injection molded parts acted as comparators. The weight reduction was measured to ensure successful microcellular structure generation. The results show that microcellular co-injection molded PP/PP-GF (skin/core) is the optimal combination, reducing weight by 4.2% over co-injection PP/PP-GF, improving yield strength by 18.2% and Young’s modulus by 2.5% over MuCell PP-GF, yet with a brittle strain at break of 0.084 mm/mm.

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Metadaten
Titel
Improvements on the tensile properties of microcellular injection molded parts using microcellular co-injection molding with the material combinations of PP and PP-GF
verfasst von
Edward Suhartono
Shia-Chung Chen
Kuan-Hua Lee
Kuo-Jui Wang
Publikationsdatum
28.10.2017
Verlag
Springer India
Erschienen in
International Journal of Plastics Technology / Ausgabe 2/2017
Print ISSN: 0972-656X
Elektronische ISSN: 0975-072X
DOI
https://doi.org/10.1007/s12588-017-9190-7

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