A brief description of the four production methods of polyethylene wax
Melting method: heating and melting the solvent in a closed, high-pressure container, and then discharging under appropriate cooling conditions to obtain the finished product; the disadvantage is that the quality is not easy to control, the operation cost is high and dangerous, and some waxes are not suitable for this method.
We have introduced a lot of knowledge about polyethylene wax before. Today we will briefly describe the four production methods of polyethylene wax.
1. Melting method: the solvent is heated and melted under a closed, high-pressure container, and then discharge under appropriate cooling conditions to obtain the finished product; the disadvantage is that the quality is not easy to control, the operating cost is high and dangerous, and some waxes are not suitable for this method.
2. Emulsion method: fine and round particles can be obtained, which is suitable for water-based systems, but the added surfactant will affect the water resistance of the coating film.
3. Dispersion method: add wax to tree wax/solution, and use ball mill, drum or other dispersion equipment to disperse; the disadvantage is that it is difficult to obtain high-quality products and the cost is high.
4, micronization method: the way of micronization can be used jet micro-powder machine or micro-powder/classifier.
The manufacture of polyethylene wax generally includes high-pressure and low-pressure polymerization methods. Among them, the polyethylene wax prepared by the high-pressure method has branched chains, and the density and melting temperature are low, while the low-pressure method can produce linear wax with low specific gravity. Polyethylene wax has various densities. For example, the non-polar polyethylene wax prepared by the low-pressure method is usually harder with lower density and has better abrasion resistance and scratch resistance, but in the slip and reduce the coefficient of friction is slightly worse.