VliesSMC – Processing recycled carbon fiber nonwovens in sheet molding compound

Saal C
Donnerstag, 14.09.2023, 13:55 - 14:20 Uhr

The presentation will focus on new ways to process rCF-nonwovens within the sheet molding compound process chain. Presented will be results of the experimental work and a cost analysis that show the potential of the developed materials.

Marcel Hofmann et al (STFI e.V., Chemnitz (GER))

STFI e.V., Chemnitz and Fraunhofer ICT, Pfinztal had investigated new ways to process rCF-nowovens. Within the research project VliesSMC, the suitability of different types of nonwovens based on recycled carbon fibers (rCF) for processing in the SMC process chain was investigated. In particular, open questions regarding the different textile manufacturing processes, production and handling of SMC semi[1]finished products, as well as the flowability in the compression molding process were addressed. The following research topics were pursued in the project: 1.) Development of adapted nonwovens made from recycled carbon fibers 2.) Influence of different web formation methods on the impregnation quality and the flowability of the SMC semi-finished product 3.) Equipment and process development with the aim of automated processing of rCF-nonwovens in the SMC process chain 4.) Limits of part complexity in the molding process of rCF-SMC depending on the achievable fiber volume content 5.) Cost analysis and economic feasibility study of the VliesSMC recycling process The cost analysis showed a savings potential in the VliesSMC process of approx. 25 % through the use of recycled fibers compared to the currently common use of primary fibers as rovings. In addition, with regard to the mold design, there is a high constructive and material savings potential due to the lower mold cavity pressure required.