structural recycling · structural applications with automotive recyclates another test series was...

“The results of this project show interesting perspectives. We will certainly continue research within this topic.” Recycling Introduction Europe has imposed impressive recycling goals on the car industry. For that reason, the sector continuously works on improvement of recycling technologies. Short fibre reinforced plastics are used to reduce weight in e.g. dashboards and other car components. Although glass fibres introduce better mechanical properties in recyclates, it is hard to find applications in which these materials are applied. A possible reason is that although stiffness is maintained in these recyclates, the strength become unreliable due to local and unpredictable material imperfections or contaminations. The aim of this project is to compensate for local imperfections by addition of a small amount of continuous fibre reinforcement, at the same time offering semi- structural properties to the final product. Approach In order to apply continuous fibres in products, recently developed technology was used for insert moulding. First continuous fibre reinforced inserts were produced, and positioned in a test mould cavity. After this, the mould cavity is filled by injecting the recycled material (PC / ABS). Both reinforced and unreinforced samples were subjected to three point bending and tensile tests. Results The figure above shows that combining G/PP continuous fibre and PP/EPDM with overmoulding will significantly increase the stiffness and strength: the stiffness increases by a factor of more than 16, while the strength is increased by a factor 7. Looking at the samples from pressed plates, these values are somewhat lower. In this case, when using a 5-layer continuous fibre insert: the stiffness increases by a factor of 4,3 and the strength by a factor of 6. The above figure shows that when applying G/PCABS continuous fibre in PC/ABS recyclate, the stiffness and strength will slightly increase. Both the stiffness as the strength will increase by a factor of approximately 1,2. STRUCTURAL RECYCLING Structural applications with automotive recyclates Another test series was produced by compression moulding PP/EPDM recyclate with continuous fibre reinforced material. Contamination/ weak spot Short fibre recyclate Continous fibre inserts This research is co-financed by Regieorgaan SIA, part of The Netherlands Organisation for Scientific Research (NWO)

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Page 1: STRUCTURAL RECYCLING · Structural applications with automotive recyclates Another test series was produced by compression moulding PP/EPDM recyclate with continuous fibre reinforced

“The results of this project show interesting perspectives. We will certainly continue research within

this topic.”

Recycling

Introduction

Europe has imposed impressive recycling goalson the car industry. For that reason, the sectorcontinuously works on improvement of recyclingtechnologies. Short fibre reinforced plastics areused to reduce weight in e.g. dashboards andother car components. Although glass fibresintroduce better mechanical properties inrecyclates, it is hard to find applications in whichthese materials are applied. A possible reason isthat although stiffness is maintained in theserecyclates, the strength become unreliable due tolocal and unpredictable material imperfections orcontaminations. The aim of this project is tocompensate for local imperfections by additionof a small amount of continuous fibrereinforcement, at the same time offering semi-structural properties to the final product.

Approach

In order to apply continuous fibres in products,recently developed technology was used forinsert moulding. First continuous fibrereinforced inserts were produced, andpositioned in a test mould cavity. After this, themould cavity is filled by injecting the recycledmaterial (PC / ABS). Both reinforced andunreinforced samples were subjected to threepoint bending and tensile tests.

Results

The figure above shows that combining G/PPcontinuous fibre and PP/EPDM with overmouldingwill significantly increase the stiffness andstrength: the stiffness increases by a factor ofmore than 16, while the strength is increased bya factor 7. Looking at the samples from pressedplates, these values are somewhat lower. In thiscase, when using a 5-layer continuous fibreinsert: the stiffness increases by a factor of 4,3and the strength by a factor of 6.

The above figure shows that when applyingG/PCABS continuous fibre in PC/ABS recyclate,the stiffness and strength will slightly increase.Both the stiffness as the strength will increase bya factor of approximately 1,2.

STRUCTURAL RECYCLINGStructural applications with automotive recyclates

Another test series was produced bycompression moulding PP/EPDM recyclate withcontinuous fibre reinforced material.

Contamination/ weak spot

Short fibre recyclate

Continous fibre inserts

This research is co-financed by Regieorgaan SIA, part of The Netherlands Organisation for Scientific Research (NWO)