Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Mechanical Properties of Thermoplastic Composites Made of Commingled Carbon Fiber / Nylon Fiber

Version 1 : Received: 8 September 2021 / Approved: 9 September 2021 / Online: 9 September 2021 (10:39:22 CEST)

How to cite: Ono, M.; Yamane, M.; Tanoue, S.; Yamashita, Y.; Uematsu, H. Mechanical Properties of Thermoplastic Composites Made of Commingled Carbon Fiber / Nylon Fiber. Preprints 2021, 2021090169 (doi: 10.20944/preprints202109.0169.v1). Ono, M.; Yamane, M.; Tanoue, S.; Yamashita, Y.; Uematsu, H. Mechanical Properties of Thermoplastic Composites Made of Commingled Carbon Fiber / Nylon Fiber. Preprints 2021, 2021090169 (doi: 10.20944/preprints202109.0169.v1).

Abstract

Fiber-opening treatment of commingled yarns consisting of thermoplastic nylon fibers and carbon fibers could produce superior CFRTP, but few studies toward that end have been conducted. In this study, we investigated whether an open weave fabric consisting of commingled yarns made of carbon and nylon fibers could shorten the impregnation distance of resin to carbon fibers, and there are few reports on the design of fabrics by opening carbon fiber bundles consisting of commingled yarns. From this study, following are cleared. The impregnation speed of the nylon resin on the carbon fiber was very fast, less than 1 minute. As the molding time increased, the tensile strength and tensile fracture strain slightly decreased and the nylon resin deteriorated. The effects of molding time on flexural strength, flexural modulus, and flexural fracture strain were negligible. From the cross-sectional observation conducted to confirm the impregnation state of the matrix resin, no voids were observed in the molded products regardless of molding time or molding pressure, indicating that resin impregnation into the carbon fiber bundle of the open-fiber mixed yarn fabric was completed at a molding pressure of 5 MPa and a molding time of 5 min.

Keywords

commingle yarn; carbon fiber; opening yarn fabric; nylon fiber; composite

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