Mica Flakes / Mica Powder

     The lamellar reinforcement Mica (known as English Mica) is obtained from the minerals muscovite K₂Al₄(Al₂Si₆O₂₀)(OH)₄ or Phlogopite K₂(MgFe²⁺)₆(Al₂Si₆O₂₀)(OH,F)₄. As the molecular formulas show, the products are complex K/Al Silicates.

Density = 2.8 g/cm³
Hardness = 2.5 to 4
Oil Absorption = 48 to 50 g per 100 g Powder

The tpyes which are not suitable for the electrical industry are used in ground forms as filler and reinforcements in various applications. The reinforcing action of mica is determined mainly by the aspect ratio.

Mica imparts the following properties to plastics : -
1. High Stiffness
2. High Dimensional stability also at elevated temperatures.
3. Good dielectric properties.

     Silanization of the filler surface facilities the incorporation of mica into plastics. The use of Amino Silanes, in particular, results in good mechanical properties of finished articles. In the automotive industry, mica is used as an inexpensive substitue for glass fibres in polypropylene parts. Metallized Mica types are new development.