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 Mica reinforced Plastics
White muscovite MICA-MU®
and MICA-SOFT® are
technical fillers especially
recommended when reinforcement, dimensional and thermal stability are required.
The other advantages linked to their uses are described below.
Surface treatment (Coupling)
MICA-MU® and MICA-SOFT® are easily bondable to coupling agents. Surface
treatment of mica is particularly useful to improve tensile and
flexural strength,
mechanical properties at high temperature and retention of
properties. Particular
suitable coupling agents are silanes and
coupling polymers such as maleic anhydride
grafted PP.
Performances of mica reinforced plastics
Reinforcement
- High rigidity at normal
and high temperature
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Relative flexural modulus of mica reinforced PP renforcé
(40 % by weight)
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Tensile strength
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Relative tensile strength of mica reinforced PP (40 % by weight)
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Thermal stability
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HDT (ISO 75) of mica reinforced PP (40 % by weight)
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Dimensional stability
and Isotropy
- Low
coefficient of thermal expansion
- Low
shrinkage on demolding
- Increased creep resistance
- Excellent warp resistance
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Shrinkage anisotropy (normal and parallel shrinkage ratio: Sp/Sn) of mica reinforced PA
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Synergistic behavior with glass fibers
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Synergistic behavior with glass fibers
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Ageing resistance
The particularly low iron content of MICA-MU® (Fe2O3=2
%) is a great advantage,
since iron displays a strong catalytic effect on ageing of polymers.
Moreover, the highly
oriented mica flakes layer parallel to the surface acts as a barrier
to UV.
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UV resistance of mica reinforced PP
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Surface properties
- Increased surface hardness
- Increased scratch resistance
- Reduced friction and wear
- Increased adhesion of
plated metals, adhesives and paints
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Peel strength of electroplated copper film is increased with the
addition of mica
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High dielectric properties
Characterized by a high breakdown voltage, high dielectric constant, low dissipation
factor, and good arc resistance, mica is clearly superior to any other
filler for most
electrical applications.
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Dielectric constant at 25
°C
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6,5-8,7
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Dielectric strength at 25 °C
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60-240 kV/mm
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Dielectric loss factor (%)
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0,1-0,4
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Specific resistivity
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2.1013 -1017W
/cm
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Electrical
properties of muscovite mica
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Greatly reduced permeability to gas and liquid
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Hydrocarbon
permeability and impact resistance of mica reinforced crosslinked
HDPE
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Excellent nucleation in structural foam
- Cellular structure more uniform
- Reduced density
- Increased impact resistance
- Reduced flammability
Acoustic performances
- Increased velocity of
sound in composites (HI-FI speaker cone)
- Increased damping properties
(Insulation)
Faster molding
cycles
Transparent to microwaves
Improved laser absorption and laser marking
Applications
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PE
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PVC
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PP
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ABS
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Acrylic
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PA
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PC
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PS
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Polyester (saturated)
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Fluoropolymers
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PPO
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Polysulfone
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PPS
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Epoxy
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Phenolics
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UPST
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PU
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Al(OH)3
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x
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x
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x
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x
|
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|
|
|
|
|
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x
|
x
|
x
|
x
|
x
|
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Barytes
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|
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x
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x
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CaCO3
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x
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x
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x
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x
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x
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|
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x
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x
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x
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x
|
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Mica
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|
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x
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x
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x
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x
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x
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x
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x
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x
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x
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x
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x
|
x
|
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Silice
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x
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x
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x
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x
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|
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x
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|
|
|
|
|
|
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x
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x
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Talc
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x
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x
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x
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|
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x
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x
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x
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x
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x
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x
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Wollastonite
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|
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x
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x
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x
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x
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x
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x
|
x
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x
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x
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Plastic applications
for extender and filler minerals (after M. De Decker,White
Minerals in plastics, Industrial Minerals, Sept. 1999)
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Additional documentation
- Properties
of Mica reinforced Plastics
For additional
information, please contact us:
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CMMP
45, rue de Saint-Petersbourg
75008 Paris
FRANCE
Tel : +33 1 43 87 45 75
Fax : +33 1 42 94 96 32
E-mail : cmmp@cmmp.fr
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