Effect of carbon black dispersibility on carbon black and productsadmin
The effect of carbon black dispersion on carbon black and products is very large. Under normal circumstances, carbon black is milled by a three-roller for dispersion. Commonly used dispersion media are glass beads, steel beads, and ceramic beads.
The working principle of three-roller grinding carbon black is to rely on shearing force and pressure to overcome carbon black cohesion to disperse and crush carbon black. When using it, the three-roller machine should be adjusted to ensure that the grinding is efficient and smooth.
1. The distance between the rollers is adjusted according to production needs, and it is stabilized after being fixed, so that the pressure between the rollers reaches a constant state.
2. The temperature of the roller is well controlled. It is necessary to ensure that the constant temperature during work is not high or low, otherwise it will affect the viscosity of the system and the dispersion of carbon black.
3. If the product requires high blackness, high gloss, high dispersion and different batch numbers, the surface of the three-roller machine should be carefully cleaned.
When using a three-roller machine, it is necessary to premix the materials and control the amount of dispersion media. Too much will increase the wear between the media and cause the particle size of the dispersion media to decrease. Too little will increase the dispersion medium spacing. , Reduce the carbon black dispersion efficiency.