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Yuan Lei's Little Knowledge | Application of Wet Mica Powder in Resin and Plastics

Release time:

2024-06-27 14:32

Yuan Lei's Little Knowledge | Application of Wet Mica Powder in Resin and Plastics

Wet mica powder is a high-quality powder with good whiteness, large diameter to thickness ratio, smooth surface, and uniform particle size obtained by special processes of crushing, drying, and grading mica fragments after washing, impurity removal, and purification. It is widely used in rubber, plastics, coatings, paints, cosmetics, and other industries.

Application in resins and plastics

① Changing the optical properties of plastics

Mica chips have functions such as reflection, radiation of infrared rays, absorption, and shielding of ultraviolet rays. If high-quality wet mica powder is added to the agricultural film, the mica microcrystals reflect infrared radiation, making it difficult for light energy to escape due to infrared radiation after passing through the agricultural film, improving the insulation effect of greenhouses, plastic films, etc. In this application, the purity and sheet-like structure of mica powder are particularly important. Impurities can reduce the enhancement effect of mica powder, affect transparency, and significantly increase haze, reducing the amount of light entering the greenhouse. Meanwhile, if the sheet-like structure is poor, the effect of blocking infrared radiation is also poor. Hong Kong Li Group Gansu Gran Chemical Technology Co., Ltd. uses wet mica powder to manufacture agricultural films, reducing transparency by only 2 percentage points.

Products such as drugs, cosmetics, and food need to be shielded from light radiation, especially ultraviolet radiation, to improve their storage performance. Their plastic packaging materials can incorporate flaky wet mica powder with perfect structure to shield light radiation, especially ultraviolet radiation.

Large particle size mica powder filler can improve the luster of materials, while fine mica powder has a extinction effect.

② Improving the airtightness of plastics

Wet mica powder has a good sheet-like crystal shape, with a microcrystalline thickness measured in nanometers and a diameter to thickness ratio of up to 80-120 times. The effective barrier area is large. After adding wet high-purity high-quality mica powder into the plastic, the airtightness will be greatly improved.

③ Improving the physical and mechanical properties of plastics

Sheet and fibrous fillers can disperse the stress on materials, and their mechanism is similar to that of steel bars in concrete. Many reinforcing materials (plastic, rubber, resin, etc.) use anisotropic materials, and their principles are the same. Only after adding high aspect ratio fillers (such as wet mica powder) can the tensile strength, impact strength, elastic modulus, other mechanical properties, morphological stability, and wear resistance of plastics and resins be significantly improved.

The hardness of plastics (such as resins) themselves is limited. Many fillers also have low mechanical strength. On the contrary, mica is one of the components of granite, with high hardness and mechanical strength. So adding mica powder as filler to plastic has a particularly significant reinforcement effect, and the high aspect ratio is the key to enhancing high-purity mica powder.

The coupling treatment of mica powder has a great effect on the above applications, as it greatly improves the overall chemical properties of the material, thereby greatly enhancing its performance. The correct coupling treatment is also the key to enhancing mica powder.

Changing the crystallization behavior of resin is also one of the mechanisms for enhancing mica powder.

The use of high-quality mica powder can make the product lighter and thinner. This technology can have a wide range of applications in the plastic industry, such as manufacturing high-strength products, including plastic parts for machinery and vehicles, geotechnical materials, home appliance casings, packaging materials, plastic products for daily use, films, cracked wires, and ropes, etc.

④ Improving the insulation performance of plastic products

Mica has extremely high resistance and is itself a high-performance insulation material. The use of mica powder to improve the insulation performance of materials is a well-known technique. If you need to manufacture high insulation plastic products, you can consider adding functional filler wet mica powder. As mentioned above, mica with high iron content has lower insulation performance and should be avoided. Dry mica powder is not washed and generally has a high iron content, so it is not suitable to use this type of mica powder.

he application of wet mica powder in plastics goes far beyond this. By fully utilizing the unique properties of wet mica powder, many valuable new plastic products can be developed, forming many valuable application technologies. For example, adding mica powder to plastics can improve printing performance and composite bonding performance; After surface precipitation of SnO2 or metal plating, mica powder has conductivity and can be used to manufacture anti-static products and conductive plastics; After coating with TiO2, it becomes a pearlescent pigment with many applications; Colored pigments with excellent performance; Mica can also improve the lubrication performance of products.

Wet mica powder,Resin,Plastic,Application,Optical characteristics

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Wet mica powder is a high-quality powder with good whiteness, large diameter to thickness ratio, smooth surface, and uniform particle size obtained by special processes of crushing, drying, and grading mica fragments after washing, impurity removal, and purification. It is widely used in rubber, plastics, coatings, paints, cosmetics, and other industries.