Novel Approach in B-Staging of an Epoxy Resin for Development of rCF Non-Woven Prepregs for RTP Processing

Christian Goergen; Andreas Klingler; Sergiy Grishchuk; David May; Bernd Wetzel; Peter Mitschang

doi:10.4028/www.scientific.net/KEM.809.521

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Novel Approach in B-Staging of an Epoxy Resin for Development of rCF Non-Woven Prepregs for RTP Processing
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 809Novel Approach in B-Staging of an Epoxy Resin for...

Novel Approach in B-Staging of an Epoxy Resin for Development of rCF Non-Woven Prepregs for RTP Processing

Abstract:

A novel B-stage resin system is developed for the „Resin Transfer Pressing“ (RTP) process. This composite manufacturing technique makes use of nonwoven and recycled carbon fibres (rCF) that are oversaturated with a thermosetting resin. The new resin system is based on two different hardeners, allowing to easily impregnate the rCF, storing the semi-finished parts at room temperature and finally curing them via compression molding. It is shown that a commercially available resin system can be tailored to the required needs by the smart combination of state-of-the art, latent hardener systems.The present study focusses on the route for B-staging of the resin system. The viscosity for impregnation and oversaturation was adjusted to be in the range of 5 to 40 Pa·s at 60°C. The viscosity increases to above 50 Pa·s at room temperature, allowing storage and handling of the semi-finished parts and processing them whenever it is required. Choosing a proper processing temperature is important during the B-staging process to avoid any unintended activation of the second hardener, which is responsible for the final curing stage of the system.

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Periodical:

Key Engineering Materials (Volume 809)

Pages:

521-526

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.809.521

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Online since:

June 2019

Authors:

Christian Goergen*, Andreas Klingler, Sergiy Grishchuk, David May, Bernd Wetzel, Peter Mitschang

Keywords:

B-Staging, Composite Manufacturing, Pre-Pregging, Recycled Carbon Fibres (rCF), Resin Transfer Pressing, Thermoset Resin

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* - Corresponding Author

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