After modification, kaolin can improve the cross-linking property with organic polymer materials, improve the dispersibility, increase the effective cross-sectional area under external load, thus enhancing the mechanical properties of organic polymer products, greatly improving the material functionality, and expanding the application range of kaolin.
Modified kaolin has been widely used, especially in coatings, plastics, rubber and other industries.
1 Application of modified kaolin in coatings
In the coating industry, two types of kaolin are commonly used: washable ultra-fine kaolin and calcined ultra-fine kaolin.
The modifier body of modified kaolin has excellent properties of high and low temperature resistance, uv resistance, oxidation resistance, electrical insulation and other properties. In addition, the physico-chemical properties of calcined kaolin are used in weather resistance, heat resistance, electrical insulation, isolation coatings and exterior wall coatings, which can play a certain role in the special performance requirements of these products.
In other coatings application, also can play a very good role in improving the quality of its products.
2 Application of modified kaolin in plastics
Kaolin in the plastic industry optimization alternative heavy CaCO ₃ as polyvinyl chloride (PVC), polypropylene, nylon, polyester, phenolic resin, such as filling material of plastic, used to make plastic pipes, plastic floor, etc.
Kaolin, as a filler of plastics, can improve the surface smoothness, dimensional precision and chemical corrosion resistance of plastics.
In particular, kaolin used in high insulation cable plastic filler, can improve its resistivity, which is other inorganic fillers can not be compared.
Modified calcined kaolin is used in other plastic products, which can improve the impact strength, stability and thermal deformation temperature of the products, and increase the amount of filler to reduce the cost.
In thermoplastics, modified kaolin is particularly effective in improving the glass transition temperature, tensile strength and modulus of the plastic.
In thermosetting plastics, modified kaolin has the function of strengthening plastics and preventing the fiber frosting and fiber exposure on the molded surface.
3 Application of modified kaolin in rubber
Kaolin can be used as filler to improve the grade of rubber products.
This is because after adding rubber powder kaolin, the formation of organic polymer (rubber) - inorganic (kaolin) composite material, it can improve the physical and chemical properties of rubber products, such as rubber can improve the mechanical strength, wear resistance, resistance to acid and alkali corrosion resistance, stability, and improve the processing performance of the rubber (such as sex, eat meal package roller speed, rolling pressure, etc.).
At the same time, it can obviously reduce the cost of rubber products and improve economic benefits.
After many years of research and development, great achievements have been made in surface modification of kaolin, especially in strengthening rubber with coupling agent surface modification.
PUDA kaolin packing machine:
Features of kaolin:
Properties: more matte, pure when the white delicate, such as impurities with gray, yellow, brown and other colors.
The appearance may take the form of loose earth masses and compact rock masses depending on the origin.
Density: 2.54-2.60 g/cm3.
Melting point: about 1785℃.
Malleable, wet soil can be molded into shapes that do not break and remain unchanged for a long time
Based on the above information, PUDA will recommend valve bag or open bag packing machine with screw feeder for kaolin. Without good fluity, screw feeder can help kaolin powder stir evenly into bags.
