Pigment Carbon Black dispersion grinding has been the use of carbon black manufacturers concerned about the problem, carbon black grinding is not good to achieve the desired effect, the production of products will be down a grade.
So how long should the pigment carbon black grinding, with what equipment grinding?
Three-roller machine is a more common equipment to grind pigment carbon black and provide pigment carbon black dispersion.
The working mechanism of three-roller machine mainly relies on shear force and pressure to overcome the cohesion of pigment carbon black, so as to achieve the purpose of dispersing and crushing carbon black. So before use, you need to adjust the three-roller machine to a good state, specifically need to pay attention to the following points:
- 1, the distance between the rollers should be carefully adjusted according to the needs of production, fixed so that it is good to make it stable, so that the pressure between the rollers to achieve a constant state.
- 2, the temperature of the rollers must be controlled to maintain a constant temperature, to avoid high and low temperatures at work, otherwise it will affect the viscosity of the system and further affect the dispersion of carbon black.
- 3、If the products produced require high blackness, high luster and high dispersion, the surface of the three-roller machine must be carefully cleaned when different batches are produced.
Sand mill is the grinding equipment with the widest adaptability, the most advanced and the highest efficiency of pigment carbon black dispersion.
When grinding pigment carbon black, the sand mill relies on the shear force of the dispersing medium in the carbon black, which is provided by high-speed rotation to disperse the carbon black to achieve the purpose of dispersion.
Commonly used dispersing media are glass beads, steel beads and ceramic beads. The advantages are high efficiency, fast dispersion time and continuous production. In the use of sand mills need to pre-mix the material, and pigment carbon black in the amount of dispersing medium to grasp, too much will increase the wear and tear between the dispersing medium, resulting in a reduction in the particle size of the dispersing medium: sometimes it will also lead to the dispersing medium of the broken, affecting the quality of the product. If it is too little, the distance between the dispersing medium will increase, which will reduce the dispersing efficiency.
According to the production experience of engineers, choose the quantity and size of dispersing medium, so that the pigment carbon black dispersion to achieve the best results.
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