Talc, the softest of all minerals is known to everyone because of talcum powder. The softness, flakiness, and stability of talc makes it a desirable substance for many purpose. In industry it is mainly classified into hard and soft and fibrous and flaky. It is a platy mineral used for its reinforcing properties. Talc is commonly used as the functional filler for the plastics, and as an extender & pigments for paints. Finely ground talc is widely used in the polypropylene industry for its reinforcing properties.
In plastics it adds to the stiffness, dimensional stability, flexural modulus & resistance to creep. It also contributes to good flow, surface appearance and easier machinability of polymers. In plastics, the primary use area of talc is in Polypropylene (PP).
|Silica||SiO2||60% ( + 2% )|
|Magnesium Oxide||MgO||30% ( + 2% )|
|Calcium Oxide||CaO||1.5% ( + 0.5% )|
|Iron||Fe||0.5% ( + 0.1% )|
|pH||pH||9 ( + 0.5% )|
|Brightness by reflectance as compared to freshly prepared MgO as 100% against blue filter wave length 457 mm
Note: Available in brightness varying from 80% to 95%
|85% ( + 0.5%)|