Talc has a special flake structure, as an important functional filler for plastic materials, the addition of talc powder in plastic products can significantly reduce material costs, save the use of resin, and improve the economic benefits of enterprises. On the other hand, talc can also significantly improve the performance of plastic products, improve a variety of physical properties of plastics, such as hardness and surface scratch resistance, rigidity and creep resistance, tensile strength and impact strength, heat resistance and heat distortion temperature, product dimensional stability, etc.
In different plastic materials, in addition to reducing costs, the application characteristics of talc are also different:
In ABS and nylon, talc improves heat resistance and molding shrinkage;
In polyethylene, the addition of talc can significantly improve the rigidity, heat resistance and dimensional stability of polyethylene;
Plastics automated production line equipment
In polypropylene, talc can improve the overall strength, heat resistance, molding shrinkage and rigidity, of which, especially the high mesh talc, can play the role of nucleating agent, improve the crystallinity of polypropylene, so as to improve its mechanical properties;
In polystyrene, talc can improve impact toughness, tensile yield strength, etc., and regulate rheology.
In some specific industry applications, talc also has its practical value, such as:
In hollow products, talc can reduce the shrinkage rate of the product, improve the stiffness, and increase its service life.
In agricultural plastic shed films, talc can make it have high light transmittance and thermal insulation.
The addition of talcum powder to engineering plastics such as automotive plastics can improve its impact strength, reduce shrinkage, and make the surface quality of the parts better and the touch better.
The addition of talcum powder to injection molded products can significantly improve the performance of the product, reduce the indentation caused by contraction such as gates and edges of injection molded parts, and make the parts obtain better appearance effects.
Among the plastics used in home appliances, talc can make it resistant to aging, sun protection, heat insulation, flame retardancy, and sound insulation.
So, what problems should be paid attention to when using talc powder?
(1) Talc powder needs to be modified to improve the compatibility between talc and plastic raw materials and improve the application effect.
(2) Under the conditions of the same formula, the dispersibility of talc in plastic raw materials has a great impact on performance, and should be strictly controlled in the production process. The main factors affecting the dispersibility of talc in plastic raw materials are formula, temperature, yield, process and so on.
(3) For different plastics, talc powder of different specifications should be selected to achieve the desired effect.
Based on the above reasons, when pneumatic conveying of talc, different conveying designs should be made for different needs. Honggong has professional powder, granule and block performance test analysis capabilities and a big data reserve base for sample analysis of pipeline diversion, and can make more accurate conveying parameters and pipeline optimization design schemes for specific projects.