Why should talcum powder be added to plastic? What are the precautions?

Release time:

2024-01-29 09:35


Why should talcum powder be added to plastic? What are the precautions?


Talc has a special flaky structure, as a filler, not only can save the amount of resin, but also significantly improve the physical properties of the product, is an important functional filler in the plastic industry.



1. Application characteristics of talcum powder in plastics


(1) Functionality


The addition of talcum powder can improve a variety of properties of plastics, such as molding shrinkage, surface hardness, flexural modulus, tensile strength, impact strength, thermal deformation temperature, molding process and product dimensional stability.


(2) Economy


There is no doubt that the addition of talcum powder can significantly reduce material costs and improve the economic efficiency of enterprises.


(3) Strong applicability and wide application range


In different plastic materials, in addition to reducing costs, the application characteristics of talcum powder are also different:
  • ABS and NylonThe addition of talcum powder can improve heat resistance and molding shrinkage;

  • PolyethyleneThe addition of talcum powder can improve rigidity, heat resistance and molding shrinkage;

  • PolypropyleneThe addition of talcum powder can improve the overall strength, heat resistance, molding shrinkage and rigidity;

  • agricultural plastic shed filmThe addition of talcum powder can improve its thermal insulation while maintaining good light transmission;

  • InPE, PP, PVC and other plastic filmIn, talc has low hardness, good hand feeling, and the refractive index is similar to PP and PE;

  • high mesh talcum powder, inPolypropyleneIt can play the role of nucleating agent, effectively improve the comprehensive performance of polypropylene;

  • Hollow productsThe addition of talcum powder can reduce production costs, reduce shrinkage, improve stiffness and increase product life;

  • Automotive plastics, pipes and other engineering plasticsThe addition of talcum powder can improve its impact strength, improve the creep resistance at high temperature, reduce the shrinkage rate, give the surface quality of the parts more excellent, the appearance is more gorgeous, and the touch is more suitable.

  • injection molding productsThe addition of talcum powder can significantly improve the mechanical properties of injection molded products, reduce the depression caused by the shrinkage of the gate and edge of injection molded parts, and improve the appearance effect and hand sensibility.

  • Plastics for Home AppliancesThe addition of talcum powder can make it resistant to aging, sun protection, fading, heat insulation, heat preservation, flame retardant and sound insulation.


2. Precautions when using talcum powder


(1) Talc powder must be surface modified


The purpose is to improve the compatibility between talcum powder and plastic raw materials, and improve the application effect. Different surface treatment agents should be selected for different plastics.


(2) the dispersion of talcum powder in plastic raw materials


Under the condition of the same formula, the dispersion of talcum powder in the plastic raw material has a great influence on the final physical and chemical properties of the modified material, which should be strictly controlled in the production process.


The main factors affecting the dispersion of talcum powder in plastic raw materials are formula, temperature, yield, process and so on. In addition, when the amount of talc added is large, it can be added step by step to achieve a good dispersion effect.


(3) For different plastics, different specifications of talcum powder should be selected


This is very particular, the choice may be counterproductive, because different plastics, different products, different conditions of use have different requirements for raw materials, so we must make different choices in order to achieve the desired effect.

Note, talcum powder, join, different, improve, plastic, improve, shrink, products, molding

Different applications and specifications of washed kaolin and calcined kaolin


Kaolin is a non-metallic mineral, which is a kind of clay and clay rock mainly composed of kaolinite clay minerals. Because it is white and delicate, also known as white earth. It is named after Gaoling Village, Jingdezhen, Jiangxi Province.

Source Lei gas barium sulfate ten uses


Barium sulfate is based on barite as the main raw material, through beneficiation, ore washing, crushing and other processes. Barium sulfate has a hardness of 3~3.5 (Mohs) and a specific gravity of 4.3~4.7. It has the characteristics of high specific gravity, low hardness and brittleness. Barite is almost insoluble in water, ethanol and acid, soluble in hot concentrated sulfuric acid. With the development of some high-performance barium sulfate products, the application field of barium sulfate is constantly expanding.

Yuan Lei's Little Knowledge | Talcum Powder Classification and Use


The main component of talc is hydrated magnesium silicate, which is monoclinic. The crystals are false hexagonal or rhombohedral flakes. Ores are usually dense massive, leaf-like, radial, fibrous aggregates. Colorless transparent or white, but with a small amount of impurities and light green, light yellow, light brown, light red and even black; cleavage surface was pearl luster. Soft, Mohs hardness 1-1.5, specific gravity 2.7-2.8.