FABRICATION%20OF%20COMPRESSION%20MOLDED%20ECO-COMPOSITES:%20OPTIMAL%20PROCESS%20CONDITIONS

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FABRICATION OF COMPRESSION MOLDED ECO-COMPOSITES
OPTIMAL PROCESS CONDITIONS
PROJECTEco-Houses Based on Eco-Friendly Polymer
Composite Construction Materials - ECO-PCCM

• INDUSTRISKO PROIZVODSTVO NA KOMPRESIONO PRESUVANI
  KOMPOZITI OPTIMALNI PROCESNI USLOVI
• V.Srebrenkoska

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Composite materials, which are produced in
Kompozitna Oprema"
  Composite materials containing cellulose paper
as reinforcement and synthetic phenolic resin as
matrix.
Composite materials containing cotton
fabric as reinforcement and synthetic phenolic
resin as matrix.
  Composite materials containing glass fabric as
reinforcement and synthetic epoxyde resin as
matrix.
Composite materials containing glass
fabric as reinforcement and synthetic phenolic
resin as matrix.
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PRODUCTION OF PREPREGS
The reinforcement material used in the
composites is impregnated with a resin when a
preform prepreg is obtained. With the
impregnation process a complete wetting of fibers
with the matrix is performed lake a transparent
film. In the prepreg itself the resin is
transformed from A to B stages that is form
liquid and soluble phase into a solid, partly
melt able phase suitable for processing. Basic
parameters in the process of prepreg production
are content of matrix, uniformity of matrix
along overall surface of reinforcement, gel time,
matrix flow, moisture content and volatiles
materials.
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PRODUCTION OF STRUCTURAL COMPOSITES
All the composites are fabricated by thermo
compression in an open mold on a semi -
industrial press in Kompozitna Oprema".
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PRODUCTION OF STRUCTURAL COMPOSITES-Optimal
process conditions
Paper / phenolic resin - based prepreg T130 -140
OC Ps 6 - 8 MPa
Cotton / phenolic resin - based prepreg T130
-140 OC Ps 6 - 8 MPa
t a bx
a,b-coef. x-thickness of the composite
Glass / epoxy resin - based prepreg T170 -180
OC Ps 2 - 5 MPa
Glass / phenolic resin - based prepreg T170 -180
OC Ps 2 - 5 MPa
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MATERIALS FOR PRODUCTION OF ECO- COMPOSITES
KENAF FIBERS PREFORMS-SMC
Components
Kenaf as reinforcement / TP1 as matrix
Kenaf as reinforcement / B3 as matrix
PELLETS
Components
RC as reinforcement / B3 as matrix / CA as coupling agent
RC as reinforcement / TP1 as matrix / CA as coupling agent
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PRODUCTION OF ECO-COMPOSITES KENAF/TP1
Optimal Press Cycle T170OC Ps 185 bar t 15
min
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MANUFACTURING OF KENAF/B3 ECO COMPOSITES
The panels are fabricated by thermo compression
in a closed mold.
Closed mold and application of spacers
Press piston
Hot plate
Polster
Optimal Press Cycle T175OC Pm until closing
on the spacers t 20 min
Release foil
Kenaf layers
Mold
Press platen
NOTE
Open mold panel
The application of the same press cycle (open
mold and high pressure) as the one for kenaf/TP1
composites was impossible because B3 was
squeezed out of the fibers.
B3 squeezed out
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MANUFACTURING OF KENAF/B3 ECO-COMPOSITES
spacers
Mold in closed position
Mold in open position
kenaf/B3 composite
To solve the problem of the B3 squeeze out, a
closed mold and 9.0 mm thick spacers were applied
to prevent full closure of the mold and migration
of PLA to the boundaries of the composite panel.
kenaf/B3 layers
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Kenaf based composites
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PRODUCTION OF ECO-COMPOSITES FROM PELLETS
Pellets
Molding tool is required One panel only per cycle
Molding line
Molding frame 120 x 120 mm
Molding package
Thay have been molded by thermo compression
at T 185oC, t10 min with increasing pressure
up to 10 000 pounds.
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RC based composites
Molded panel
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