Since 1932, family-owned company
45, rue de Saint-Petersbourg - 75008 Paris - FRANCE - Tel : 33 1 43 87 45 75 - Fax : 33 1 42 94 96 32
cmmp-france.com

 

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


Relative flexural modulus of mica reinforced PP renforcé (40 % by weight)

 

 

 

 

 

 

 

 

Tensile strength


Relative tensile strength of mica reinforced PP (40 % by weight)

 

 

 

 

 

 

 

 

Thermal stability


HDT (ISO 75) of mica reinforced PP (40 % by weight)

 

 

 

 

 

 

 

Dimensional stability and Isotropy

  • Low coefficient of thermal expansion
  • Low shrinkage on demolding
  • Increased creep resistance
  • Excellent warp resistance


Shrinkage anisotropy (normal and parallel shrinkage ratio: Sp/Sn) of mica reinforced PA

 

 

 

 

 

 

 

 

Synergistic behavior with glass fibers



















Synergistic behavior with glass fibers

 

 

 

 

 

 

 

 

 

 

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.















UV resistance of mica reinforced PP


 

 

 

 

 

 

 

Surface properties

  • Increased surface hardness
  • Increased scratch resistance
  • Reduced friction and wear
  • Increased adhesion of plated metals, adhesives and paints

Peel strength of electroplated copper film is increased with the addition of mica


 

 

 

 

 

 

 

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.

Dielectric constant at 25 °C 6,5-8,7
Dielectric strength at 25 °C 60-240 kV/mm
Dielectric loss factor (%) 0,1-0,4
Specific resistivity 2.1013 -1017W /cm
Electrical properties of muscovite mica


 

 

 

 

Greatly reduced permeability to gas and liquid

Hydrocarbon permeability and impact resistance of mica reinforced crosslinked HDPE


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

  PE PVC PP ABS Acrylic PA PC PS Polyester (saturated) Fluoropolymers PPO Polysulfone PPS Epoxy Phenolics UPST PU
Al(OH)3 x x   x x               x x x x x
Barytes                               x x
CaCO3   x x x   x   x           x x x x
Mica     x x   x x   x x x x   x x x x
Silice x x x   x     x               x x
Talc x x x     x x x           x x   x
Wollastonite     x     x x x x         x x x x
Plastic applications for extender and filler minerals (after M. De Decker,White Minerals in plastics, Industrial Minerals, Sept. 1999)


Additional documentation

  • Properties of Mica reinforced Plastics

For additional information, please contact us:

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-france.com