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The difference between calcined talc powder | and ordinary talc powder
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The difference between calcined talc powder | and ordinary talc powder

Classification:
News
Release time:
2020-09-07
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The difference between calcined talc powder | and ordinary talc powder

 

 

Like ordinary talcum powder, calcined talcum powder is a white powdering solid with a greasy feel when touched by hand. Specifications according to the fineness to be divided into 200 mesh, 325 mesh, 500 mesh, 600 mesh, 800 mesh, 1250 mesh, etc., under 400 mesh can be processed by ramon mill or high pressure grinding mill, more than 500 mesh needs to be processed by super fine grinding machine or micro grinding mill. What are the details of the difference between calcined talc and ordinary talc?
 
The main differences are in whiteness, composition and viscosity. The calcium carbonate in calcined talcum powder will be reduced a lot. The product is processed by a series of processes such as mining, crushing and pickling. So it won't be very white.
 
Talc powder is white or similar white, fine, non-sandy powder, greasy hand feeling, odorless, tasteless. The mined talc is directly crushed by ramon mill or other high-pressure pulverizer to obtain finished powder, which is directly packed in woven bags and sold. Talc has excellent physical and chemical properties such as lubricity, viscosity resistance, flow aid, fire resistance, etc. Talc powder is widely used.

 

The application of calcined talcum powder is mainly used as a gelatinizer in rubber plastic resin, especially in foaming products, which can help it to process and shape. In the process, no matter in pressing or pressing, it can shorten the forming time and improve productivity. Calcined talc in the resin can change the physical properties of the product: increase tensile strength, impact strength, shear strength, flexural strength, hardness, reduce deformation, elongation, cushion expansion coefficient, etc. Calcined talc is used to reduce the cost of raw materials by 10 ~ 15% for moulding, rolling, extrusion, injection and other processing properties of improved rubber and plastic resins, and for the replaceable part of more expensive glue.
 
Calcined talc is also a kind of thermal stabilizer. Because it contains high fatty acid lipids, it can not only be used as a lubricant for rubber plastic products, but also react with the precipitate HCl, so that HCl loses its cracking function.

 

 

The application of calcined talcum powder is mainly used as a gelatinizer in rubber plastic resin, especially in foaming products, which can help it to process and shape. In the process, no matter in pressing or pressing, it can shorten the forming time and improve productivity. Calcined talc can improve the tactile sensation and reduce the electrostatic effect. Strong magnesium powder penetrates into the adhesive, making the product easy to print and finish.
 
Calcined talc has antioxidant properties because it contains aromatic compounds that prevent the bonds in the polymer from being broken by heat, light or oxygen.
 
In addition, calcined talcum powder in the paint, coating, exposure, resistance to high temperature resistant, don't change color under uv irradiation, can keep the original luster and color for a long time, has good resistance to acid and alkali corrosion performance, and good resistance to water, dirt no resistance, aging resistance is stronger, wear-resistant, resistant to steam and chemical stability, and strong flame retardant performance.