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Chemtrade Marketing, based in South Africa are import and export suppliers of Talc.

Talc is used as a filler, coating, pigment, dusting agent and extender in plastics, ceramics, paint, paper, cosmetics, roofing, rubber and many other products.

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What is Talc?

Talc is a plastic filler/additive, a water-repellent, chemically inert mineral that consists of a layer or sheet of brucite between two sheets of silica.

Adding talc to PP notably enhances its properties, including greater stiffness/rigidity; higher impact strength (particularly at sub-zero temperatures); better heat, creep and chemical resistance; and especially increased dimensional stability, even after molding.
Talc-filled polypropylene also helps reduce the sink marks in a part. Sink marks occur anytime you have a thick cross-section of material with a corresponding thinner cross-section next to it. The thicker part shrinks while cooling and causes the indentation. Sink marks affect both a part’s appearance and its functionality.

Polypropylene (PP) is one of the most extensively produced polymers, especially widely used as automotive parts due to its good impact resistance as well as processability.
The addition of fillers into PP matrix has been an accepted route to achieve enhancement in material properties or/and cost saving possibilities.
Talc is the softest mineral filler used in the plastics industry.
It has high resistivity, low gas permeability, low abrasiveness, and high lubricity. All of these qualities are attributed to talc's platey structure. The aspect ratio of talc fillers is as high as 20:1.
Talc with a high aspect ratio has shown reinforcement ability in high-density polyethylene, polypropylene, and other thermoplastics, especially when they are treated with coupling agents to promote better bonding with these polymers.
The platy shape of talc particles can increase the stiffness of products such as polypropylene, vinyl, polyethylene, nylon, and polyester. It can also increase the heat resistance of these products and reduce shrinkage. Where the plastic is extruded in the manufacturing process, talc's very low hardness produces less abrasion on equipment than harder mineral fillers.

1 Casino Road
Founders Hill
Modderfontein Estate
South Africa

Branch Office Address
Liberty Building
21 Aurora Drive
Kwa – Zulu Natal
South Africa

Johannesburg Tel : +27 10 009 6858
Durban Tel : +27 31 536 2552
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Wednesday: 08:00 to 17:00
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