Yuan Lei little knowledge | Application range of wollastonite powder

Release time:

2024-04-18 15:50

Yuan Lei little knowledge | Application range of wollastonite powder

|Scope of application|

Wollastonite crystals fluoresce under ultraviolet light, and sometimes phosphorescent. Mainly used in ceramics, coatings, plastics, rubber and other industries.

Wollastonite powder has needle-like, fibrous crystal form, high whiteness and unique physical and chemical properties, and is widely used in ceramics, paints, coatings, plastics, rubber, chemical industry, paper making, welding rod, metallurgical protection slag and as asbestos substitute.

(1) In the plastics industry, wollastonite powder not only plays a filling role, but also can partially replace asbestos and glass fiber for reinforcing materials. At present, it has been used in epoxy, phenolic, thermosetting polyester, polyolefin and other plastics. Wollastonite powder is widely used in plastics for deep processing products. As a plastic filler, it is mainly used to improve tensile strength and flexural strength and reduce costs.



(2) In the rubber industry, natural wollite powder has a special needle-like structure, white, non-toxic, after ultrafine grinding, surface modification is the ideal filler for rubber, not only can reduce the production cost of rubber products, but also can improve the mechanical properties of rubber, give rubber itself does not have special functions.



(3) In the coating industry, wollastonite powder as a filler for paints and coatings can improve the physical and chemical properties of the product, persistent weather resistance, reduce the gloss of the paint, enhance the expansion ability of the paint, reduce cracks, but also reduce the amount of oil absorption and enhance the corrosion resistance. Wollastonite has bright color and high reflectivity, which is suitable for the production of high-quality white paint and clear and transparent colored paint. Acicular wollastonite powder has good flatness, high color coverage and uniform distribution, and has the characteristics of anti-ultraviolet. It is widely used in interior wall paint, exterior wall paint, special paint and latex paint. Ultrafine particle size, the higher the whiteness and PH value, the better the color and coating property of the paint, and the alkaline paint can be used as an anti-corrosion coating for steel and other metal equipment.



(4) In the paper industry, wollastonite powder can be used as filler and plant fiber composite into paper composite fiber to replace some plant fiber. Reduce the amount of wood pulp, reduce the cost, improve the performance of paper products, improve the smoothness and opacity of paper products, improve the evenness of paper products, eliminate the static electricity of paper products, the shrinkage rate of paper products is less, the printability is good, and can reduce the pollution emissions in the pulping process of plant fiber.


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Yuan Lei's Little Knowledge | Performance Requirements and Types of Fillers for Coatings


Fillers in coatings are usually white or slightly colored pigments with a refractive index less than 1.7. It has the basic physical and chemical properties of pigments used in coatings, but due to its refractive index being similar to the film-forming material, it is transparent in coatings and does not have the coloring and covering power of coloring pigments. It is an indispensable pigment in coatings.

Yuan Lei's Little Knowledge | Application Effects of Different Mineral Powder Materials in Coatings


In architectural coatings, commonly used mineral materials include barium sulfate, calcium carbonate, kaolin, mica powder, talc powder, quartz powder, silica micro powder, transparent powder, glass powder, wollastonite powder, etc. Reasonable application of various mineral materials can effectively improve or enhance the performance of coatings. Let's take a look at the application of different mineral materials in coatings.

Yuan Lei's Little Knowledge | Characteristics of Mineral Materials


Mineral materials refer to the material products obtained by processing and transforming natural minerals (mainly non-metallic minerals) or rocks as the main raw materials, or minerals or rocks that can be directly used as materials and aim to utilize their main physical and chemical properties. This meaning mainly includes the following four aspects: first, natural minerals and rocks that can be directly utilized or processed to be utilized; Secondly, finished or semi-finished materials made mainly from natural non-metallic minerals and rocks through physical and chemical reactions; Thirdly, artificially synthesized minerals or rocks; Fourthly, the direct utilization targets of these materials are mainly their own physical or chemical properties, not limited to individual chemical elements.