Talc is representative of a flaky filler. Talc is crushed and ground by mechanical means. As a filler for plastics, it can improve the rigidity of the product and improve the resistance to acid and alkali, heat resistance, impact strength and tensile strength of rubber. , Creep resistance and electrical insulation properties.

Polypropylene (PP) is currently the second-largest resin species after production and consumption, which is second only to polyethylene (PE) and is an indispensable material for the development of the national economy. When mixed with inorganic particles such as calcium carbonate and talc, the heat resistance and rigidity of PP can be increased, and the cost can be reduced.

Microscopically, in the composite system, the distribution and combination of various substances on the interface between the filler and the polymer are very complicated. Polypropylene is a non-polar polymer with hydrophobic properties and low adhesion to talc. In PP/elastomer/talc powder composites, although talc has been treated with a coupling agent, its compatibility with the PP/elastomer matrix is ​​very limited, resulting in the inability to form a complete adhesive surface and therefore it is not uniform. The stresses are transmitted in the ground, so that the addition of talc reduces the toughness and impact resistance of the system.

However, with the decrease of the talc particle size, the specific surface area of ​​the interfacial zone in the composite system increases, which is conducive to the uniform transfer of stress, resulting in an increase in the toughness and impact resistance of the material.

The particle size of talcum powder has a certain influence on the filling effect. The comprehensive performance of the material with a larger particle size of talcum powder is less than that of a material with a smaller particle size.

Most of the talc is ultimately applied in powder form. Fine grinding and ultra-fine grinding are the processing techniques necessary for talc. The talcum powder used for filling materials, its particle size directly affects the pros and cons of its products and determines the ultimate profit of the enterprise.

At present, the talc crushing process mainly adopts the dry process, and Guilin Hongcheng Mining Equipment Manufacturing Co., Ltd. HLMX ultrafine vertical mill has a leading advantage in talc ultrafine grinding. After the secondary grading, the particle size of the grinding product can reach The 2500-3000 mesh provides reliable equipment and technical support for the production of high-end talc packing materials.

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