What is the effect of adding synthetic waxes to pigments? In order to achieve better production requirements, various chemical components are often added to optimize conditions. Oxene polymers with an average molecular weight of 2,000~10,000 are collectively referred to as polyolefin wax, also known as polymer wax, which is a kind of polyolefin synthetic wax. White powder, granules or flakes, translucent, density 0.9g/cm3. The softening point is 100~110℃. Viscosity (140°C) 550mPa·S. Although the softening point is high, the melt viscosity is very low, the dispersion and fluidity are good, and it has good compatibility with polyolefin.
1. Pigment or dye. Pigments are further divided into organic pigments and inorganic pigments of polyolefin wax. Commonly used organic pigments are: Phthalocyanine Red, Phthalocyanine Blue, Phthalocyanine Green, Light Fast Red, Macromolecular Red, Macromolecular Oxygen, Permanent Solid Oxygen, Permanent Violet, Azo Red, etc. Commonly used inorganic pigments include: Cadmium Red, Cadmium Oxide, Titanium Dioxide, Carbon Black, Iron Oxide Red, Iron Oxide Oxide, etc.
2. Synthetic wax as a carrier is the matrix of pigment particles. Special-purpose colorants generally choose the same resin as the product resin as the carrier, and the compatibility between the two is the best. But at the same time, the mobility of the carrier must also be considered.
3. Dispersant. To disperse the pigment evenly and prevent it from agglomerating, the dispersant should have a lower melting point than the resin, have good compatibility with the resin, and have a good affinity with the pigment. Commonly used dispersants are: polyolefin low molecular wax, stearate.
4. Additives. Flame retardant, brightening, antibacterial, antistatic, anti-oxidation and other varieties, unless the customer makes a request, generally the toner does not contain the above additives.
Polyethylene wax itself has a low melting point, a wide melting range, too much added, and the melt flow rate of the color particles is high, which will have a smooth surface during the increased processing process, thereby weakening the mechanical and melt properties. The shearing effect makes the pigment particles finer in the melt, and the dispersion effect is greatly reduced, resulting in uneven dispersion of the pigment in the product, and the coloring power of the pigment is reduced and the coloring quality is affected.
Leave a message
We’ll get back to you soon