Hochdrapierbare Thermoplastfaserbandstrukturen aus rCF für komplex geformte Composites

Cherif, Chokri; Hasan, Mir Mohammad Badrul; Hoebel, Simon; Abdkader, Anwar

doi:10.51202/0323-3243-2021-4-124

Cited by 2 publications

(2 citation statements)

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“…For the rCF prepared in this way, a recycling process chain was developed and successfully implemented at the ITM of the TU Dresden, including the production of rCF hybrid yarns for semi-finished reinforcement products and thermoplastic composite components [ 8 , 9 , 10 ]. For the development of rCF hybrid yarns, the conventional yarn formation technology was used.…”

Section: Methodsmentioning

confidence: 99%

Recycling of Carbon Fibres and Subsequent Upcycling for the Production of 3D-CFRP Parts

2022

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Carbon fibres (CF) are used in CF reinforced plastic (CFRP) components. However, waste from CF yarn trim, CFRP and the end of life (EOL) CFRP structures will cause a recycling challenge in the next decades because of strict environmental regulations. Currently, recycling is carried out almost entirely by the use of pyrolysis to regain CF as a valuable resource. This high temperature process is energy consuming, and the resulting fibres are brittle. Hence, they are not suitable for processing of textiles into yarns or new reinforcement structures. To enable grave to cradle processing, a new approach based on a solvolysis recovery of CF and subsequent yarn spinning to obtain hybrid yarns suitable for textile processing, especially by weft knitting, was the focus of the international research project IGF/CORNET 256EBR. For the first time, it was possible to process hybrid yarns made of rCF on a weft knitting machine to produce biaxial reinforced structures to form CFRP from recycled carbon fibres. Therefore, various modifications were done on the textile machinery. In this way, it was possible to process the rCF and to get out a reproducible textile structure for the production of 3D recycled CFRP (rCFRP) parts.

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Section: Methodsmentioning

confidence: 99%

Recycling of Carbon Fibres and Subsequent Upcycling for the Production of 3D-CFRP Parts

2022

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“…Subsequently, the tapes were consolidated into a uniform thickness by applying pressure using two consolidation rollers. Tapes with fiber lengths ranging from 40 to 100 mm were produced at a processing speed of 10 m/min [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

New Approach for Processing Recycled Carbon Staple Fiber Yarns into Unidirectionally Reinforced Recycled Carbon Staple Fiber Tape

Detzel,

Mitschang,

Breuer

2023

Polymers

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This study describes a novel process in which staple fiber yarns made from recycled carbon fibers (rCFs) and polyamide 6 (PA6) fibers are further processed into semi-finished tape products in a modified impregnation and calendaring process. In this process, the staple fiber yarns are heated above the melting temperature of the polymer, impregnated, and stretched to staple fiber tapes (SF tapes) in the calendaring unit. SF tapes with different degrees of stretching and/or repasses were produced. The individual width and thickness were measured in line by a laser profile sensor. From these tapes, preforms were manually laid and processed into laminates in an autoclave. The important physical properties of the unidirectionally reinforced laminates made of the tapes were compared with organic sheets wound from staple fiber yarns. With increasing stretching, both the fiber orientation and mechanical properties improved compared to the organic sheets made from unstretched staple fiber yarns. An improvement in fiber orientation relative to the process direction from 66.3% to 91.9% (between ±10°) and 39.1% to 71.6% (between ±5°), respectively, was achieved for a two-stage stretched tape. The tensile and flexural moduli were increased by 15.2% and 14.5%, respectively.

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Hochdrapierbare Thermoplastfaserbandstrukturen aus rCF für komplex geformte Composites

Cited by 2 publications

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Recycling of Carbon Fibres and Subsequent Upcycling for the Production of 3D-CFRP Parts

Recycling of Carbon Fibres and Subsequent Upcycling for the Production of 3D-CFRP Parts

New Approach for Processing Recycled Carbon Staple Fiber Yarns into Unidirectionally Reinforced Recycled Carbon Staple Fiber Tape

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