Fraunhofer Research Institution for

Casting, Composite and Processing Technology IGCV

reTHINK – „CFRP – Recycling and Sustainability“

Processing routes for recycled carbon fibres

M.Sc. Michael Sauer 16.-21.11.2016

18.11.2016 @ KMITLKing Mongkut's Institute of Technology Ladkrabang,

Central Library 5th floor, Chalongkrung Road, Ladkrabang District, Bangkok 10520

21.11.2016 @ UCSIUCSI University, North Wing Campus, Taman

Taynton View Cheras, Lot 12734 Jalan Choo Lip Kung, 56000 Kuala Lumpur

16.11.2016 @ JEC AsiaSUNTEC International Convention & Exhibition Centre,

1 Raffles Boulevard, Suntec City, Singapur 039593

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First stepDefinition of Input-Wastestreams

2

Dry Prepreg Laminate

Removal of matrixby

Fibre-Matrix-Separation

cdn.fibreglast.com/images/LC_Prepreg.jpg

First stepDefinition of Input-Wastestreams

3

Dry

Pre

pre

gLa

min

ate

Separation route

Processing of discontinuous(semi-finished) products ?

Direct route

cdn.fibreglast.com/images/LC_Prepreg.jpg

Input-WastestreamsDefinition of framework conditions

4

EffectiveProcessing

of rCF

Quality ofInput-

Material

Homogenityof Input-Material

ImpuritieswithinInput-

Material

Impuritiesduringprocess

AbrasivityFibre-

Shortening

Electricalconductivity

Price

Industrial Safety

Processing of recycled carbon fibresDefinition of framework conditions

5

Fibre-Length

Altstädt V.: Serientaugliche Verfahren für faserverstärkte Kunststoffbauteile (2008).

Processing of recycled carbon fibresDefinition of framework conditions

6

Fibre-Volume-Content

Kindervater C.: Technologie- und Dimensionierungsgrundlagen für Bauteile aus Faserkunststoffverbund (2004).

Processing of recycled carbon fibresDefinition of framework conditions

Fibre-Orientation

Thomason J.L., Vlug M.A. et al: Influence of fiber length and concentration on the properties of glass fiber-reinforced polypropylene: Part 1 - Tensile and flexural modulus. Composites, 27A, pp477-484 (1996), Part 3 - Strength and strain failure. Composites, 27A pp1075-1084 (1996), Part 4 - Impact properties. Composites, 28A, pp277-288 (1997).

Processing of recycled carbon fibresOverview of different technologies

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SMC/ BMCCompounding

Non-woven

Yarn-Building

…Patch-Processing

Processing of recycled carbon fibresWeb-based Nonwovens

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Processing of Web-based Nonwovens

Dry Lay-upWet Lay-up

Carding AerodynamicHydrodynamic Yarn-Building„Yarn“-Building

Web-based NonwovensWet Lay-Up

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[Pil14]

Web-based NonwovensWet Lay-Up

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[Pil14]

Class ical textile process ing (Example: Autefa Solutions)

Web-based NonwovensDry Carding

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„Fibre-Opening“ and first alignment Carding-Process

Additional: Stabilisation

mechanical

thermal

Semi-finished product

Processing of recycled carbon fibresWeb-based Nonwovens – Dry Carding

13

Processing of recycled carbon fibresPatch-Processing

14

Cleaning/ Activation

Stabilisation(e.g. TP-Nonwoven)

ContinuousMaterial

σM = 80% vCF

E = 100% vCF

F. Manis: GaRecCa – Ganzheitliche Recycling-Prozesskette für Carbonfasergewebe & Gelegepatches. Experience Composites Augsburg. 2016

Processing of recycled carbon fibresPatch-Processing

15 F. Manis: GaRecCa – Ganzheitliche Recycling-Prozesskette für Carbonfasergewebe & Gelegepatches. Experience Composites Augsburg. 2016

Processing of recycled carbon fibresConclusion

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There are several interesting methods for the processing of rCF

Some needs to be adapted

Some needs to be upscaled

Some new (combinations) needs to be developed

Processing of recycled carbon fibresContact us

Fraunhofer IGCVAm Technologiezentrum 286159 Augsburg, Germany

M.Sc. Michael SauerPhone +49 821 / 90678-238michael.sauer@igcv.fraunhofer.de

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