to change the surface properties of calcium carbonate, so as to increase the compatibility of the interface and reduce the mutual agglomeration of powders.
Commonly used surface modifiers mainly include: fatty acids (salts), phosphate esters, quaternary ammonium salts, silane coupling agents, titanate coupling agents, aluminate coupling agents and composite coupling agents.
Calcium Carbonate Powder Surface Modification Methods
The methods for surface modification of calcium carbonate powder are mainly divided into
inorganic surface modification, organic surface modification, polymer surface modification, mechanical chemical modification and high-energy surface modification, etc.
Among them, the most mainstream calcium carbonate surface modification method is
organic surface modification, and the modification machine used is
SLG powder surface coating machine.
SLG powder surface coating machine
Application areas:
The modifier is mainly used in non-metallic mineral fillers or pigments such as plastics, rubber, adhesives and other modern polymer materials, polymer-based composite materials, functional materials and coatings.
Uses:
Used in non-metallic mineral fillers or pigments such as plastics, rubber, adhesives and other modern polymer materials, polymer-based composite materials, functional materials and coatings industries.
After mineral powder is modified, it can not only greatly Improve the compatibility of inorganic mineral fillers and organic high molecular polymers, increase the interface bonding force, enhance the mechanical strength and comprehensive performance of the material, and can also greatly increase the filling amount of powder fillers, reduce production costs and provide products at the same time Some special physical and chemical properties.
Features of SLG powder surface coating machine
1. This unit can continuously run and produce, and has a large processing capacity, which is suitable for industrial production of various scales.
2. The use rate of the modified agent is high, the dosage is small, the powder coating rate and activation index are high, and the energy consumption is low.
3. The equipment has both modification and dispersing functions, and is suitable for materials of various finenesses. It has a unique modification and activation effect for materials with small false specific gravity and large bulk density, such as white carbon black, mica powder, and talc.
4. High-speed gas-solid phase vortex mixing operation of powder and medicament has high modification efficiency and basically does not damage the original particle shape of the powder.
5. Negative pressure operation of materials, good sealing, no leakage of dust, basically no pollution, good operating environment and low labor intensity.
SLG powder surface coating machine
Working principle of SLG powder surface coating machine
When the mechanical force of the modifier is strong, the critical time for crack formation is shorter than the mechanical action time for such cracks, or when the size of the particles subjected to mechanical force is smaller than the critical size for crack formation, no cracks will occur. , And will produce plastic deformation and accumulation of various defects, which is the mechanical activation process. In the micro-particle agglomerates, due to the slip between the particles, the elastic deformation of the particles themselves, the lattice defects on the surface of the particles, and the irregular structure of the grain boundary, the powder stress effect is alleviated, resulting in the reduction of the fragmentation effect.
SLG powder surface coating machine performance
1. This unit can continuously run and produce, and has a large processing capacity, which is suitable for industrial production of various scales.
2. The use rate of the modified agent is high, the dosage is small, the powder coating rate and activation index are high, and the energy consumption is low.
3. The equipment has both modification and dispersing functions, and is suitable for materials of various finenesses. It has a unique modification and activation effect for materials with small false specific gravity and large bulk density, such as white carbon black, mica powder, and talc.
4. High-speed gas-solid phase vortex mixing operation of powder and medicament has high modification efficiency and basically does not damage the original particle shape of the powder.
5. Negative pressure operation of materials, good sealing, no leakage of dust, basically no pollution, good operating environment and low labor intensity.
6. The heating and cooling are completed in one machine, no separate heating and cooling system is needed, which simplifies the operation.
7. Independent fluid and non-fluid dosing
