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From fillers towards high end applications
From natural fibres as fillers towards high end applications in
composites.
Lindy Hensen & Willem Böttger
This is a presentation from
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From fillers towards high end applications
Content
NPSP Composites NaBasCo Optimization NaBasCo Conclusion
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From fillers towards high end applications
NPSP Composites
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From fillers towards high end applications
Established in 1998 Around 25 employees Thermosetting composites Some customers: Nedtrain, ANWB, G-Star,
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From fillers towards high end applications
Products NPSP Composites
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From fillers towards high end applications
Production processVacuum Assisted – Resin Transfer Moulding
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From fillers towards high end applications
Options NPSP Composites
• Transparent resins• Different kinds of fibres possible
•Integration of LEDs
• Use of inserts• Details on all sides
• Double shaped curves• Elegant products
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From fillers towards high end applications
Mission NPSP Composites
‘It is our mission to make sustainable composites common ground.’
Fibres Resins
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From fillers towards high end applications
Nature Based Composites
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From fillers towards high end applications
NaBasCo
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From fillers towards high end applications
Nature Based Composites
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From fillers towards high end applications
Nature Based Composites
NaBasCo is:• Natural fibres: flax, hemp• Resins: polyester• Sandwich material & additives
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From fillers towards high end applications
Current situation
Current reasons to apply natural fibres: Weight Price Acoustics Radiance permeability Health and safety in processing Esthetics Sustainability
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From fillers towards high end applications
Current situation
Non-wovens No optimization fibres for use in composites Hands on approach
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From fillers towards high end applications
Current situation
Consequences: a lot of uncertainties What about: fire resistance, moisture sensitivity, lifetime, etcetc.
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From fillers towards high end applications
Optimization NaBasCo
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From fillers towards high end applications
Potential natural fibresMechanical properties
Flax Hemp GlassDENSITY g/m3 1,4-1,5 1,48 2,55YOUNG’S MODULUS GPa 50-70 30-60 73TENSILE STRENGTH MPa 900-1400 400-700 2400-
3500
STRAIN AT FAILURE % 2,0-3,0 1,6-2,5 3,0
Flax Hemp GlassSpecific YOUNG’S MODULUS
GPa 33-50 20-41 29
Specific TENSILE STRENGTH
MPa 600-1000 270-473 941-1373
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From fillers towards high end applications
Optimization NaBasCoMechanical properties
Current optimization steps: Use of wovens and unidirectional mats
UD flax (20 V% )*UP Ref: Glass non-woven (20 V%) * UP
Strength (MPa) 180 140E-modulus (GPa) 14 8,5
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From fillers towards high end applications
Optimization NaBascoMechanical properties
Current optimization steps: Low-torque yarn or direct use of sliver: Twining results in reduction of tensile strength of at least 10%
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From fillers towards high end applications
Optimization NaBascoMechanical properties
Current optimization steps: Lower moisture content of natural fibres
Moisture content natural fibres around 10%. Influence drying on mechanical properties:
E-modulus: 60% higher Tensile strength: 25% higher
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From fillers towards high end applications
Optimization NaBascoMechanical properties
Other possible optimization steps: Use of sizings to improve adhesion resin-fibres Thermal modification of natural fibres Other natural fibres
Besides mechanical properties: This year official tests on: fire resistancy, moisture absorption and uptake, aging,… Further “greening” of NaBasCo:
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From fillers towards high end applications
Optimization NaBasCoPotential fully bio-based composites
The next step: also bio-based resins. A few resins on the market; 25%-100% bio-based; Not all fit for VA-RTM: viscosities, high
curing temperatures (>140 degrees); Compatibility with natural fibres limited: moisture sensitivity, aggressive.
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From fillers towards high end applications
Conclusion
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From fillers towards high end applications
Conclusion
NaBasCo shows a lot of potential: UD flax already show mechanical properties comparable (or higher) to that of glass non- woven. Fully bio-based composites are proven to be feasible in the future
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From fillers towards high end applications
Conclusion
Optimizations and development are needed: Optimization of processing of natural fibres for use in composites; Optimization of natural fibre reinforced composites; Towards fully bio-based composites (bio-resins!); Chain & market development.
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From fillers towards high end applications
Questions or suggestions?
Contact:NPSP Composieten BV
Lindy Hensen+31 23 55 123 28