How is polyethylene wax made? Production method of polyethylene wax
1, Melting method: The finished product is obtained by heating and melting the solvent in a closed, high-pressure container and then discharging it under proper cooling conditions; the disadvantages are that the quality is not easily controlled, the operation is costly and dangerous, and some waxes are not suitable for this method.
2, Emulsification method: fine and round particles can be obtained, suitable for water-based system, but the added surfactant will have an impact on the water resistance of the coating film.
3, Dispersion method: Add the wax to the tree wax/solution and disperse it by using ball mill, drum or other dispersion equipment; the disadvantage is that it is difficult to obtain high quality products and the cost is high.
4, Micro-powdering method: Jet-Microniser or Microniser/Classifier can be used, which means that the coarse wax is gradually broken into particles after fierce collision with each other at high speed, and then blown out and collected by centrifugal force under weightlessness. This is the most used manufacturing method at present.
Although there are many methods of using wax, micronized wax is still the most used, and there are many different types of micronized wax on the market, and the production process of each manufacturer is different, which makes the particle size distribution, relative molecular mass, density, melting point, hardness and other properties of micronized wax vary from factory to factory.
Polyethylene wax manufacturing, there are generally high-pressure, low-pressure polymerization method; the high-pressure method of polyethylene wax with branched chains, density and melting temperature are lower, while the low-pressure method can be made straight chain of low specific gravity of wax.
PE waxes are available in different densities. For example, for non-polar PE waxes made by the same low-pressure method, the lower density (low branched chain, high crystallinity) is usually harder and has better resistance to abrasion and trauma, but is slightly worse in terms of slipperiness and lower friction coefficient.
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