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Circular materials for sustainable carbon fibre composites

Reference number
Coordinator Swerea SICOMP AB - Swerea SICOMP, Mölndal
Funding from Vinnova SEK 125 000
Project duration April 2017 - January 2018
Status Completed
Venture Innovair/SMF

Purpose and goal

The project aims to find a way to reuse the epoxy pre-impregnated carbon fibres (CF prepreg) cut-offs. Today, 20 to 30 % of all prepreg material is discarded as arbitrarily shaped cut-offs and cannot, due to its shape, easily be reused for composite manufacturing. The proposed recycling method involves transforming the arbitrarily shaped cut-offs into uniform rectangles, dispersing them over a mould, and finally consolidating and curing them into a composite plate using vacuum and heat. Such plates are expected to have good mechanical properties and numerous potential applications.

Expected results and effects

The goal of the project is achieved as a number of composite plates are manufactured using the proposed method. The manufactured plates appear to be of good quality, without any visible dry spots and are expected to have good mechanical properties. This result supports the proposed recycling process and, as a consequence, can lead to a reduction in the amount of CF prepreg waste. A potential use of the recycled composite plates as the skin in a sandwich structure is investigated and two sandwich plates is manufactured for this purpose.

Planned approach and implementation

Different kinds of CF prepreg material from SAAB and Aston Harald are cut into uniform rectangles using a handheld cutting machine from Aplicator Systems. Various parameters, which influence the cutting performance are identified and adjusted. Using the proposed recycling method, new composite plates are manufactured. Thereafter, sandwich plates are manufactured with the mould side of the composite plates facing outwards for aesthetic purposes.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 25 November 2019

Reference number 2017-01666

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