Brief description of color master batch materials:
A plastic colorant made of a high proportion of pigments or additives and thermoplastic resins through good dispersion. The resin selected has good wetting and dispersing effect on the colorant, and has good compatibility with the colored material. Namely: pigment+carrier+additive=color masterbatch

Equipment characteristics of color masterbatch dryer:
The double-cone rotary vacuum dryer is a drying equipment integrating mixing and vacuum drying. The process of vacuum drying is to place the dried material in a sealed cylinder, use the vacuum system to vacuumize and heat the dried material continuously, so that the water inside the material diffuses to the surface through the pressure difference or concentration difference, and the water molecules (or other non-condensable gases) gain enough kinetic energy on the surface of the material, and then diffuse to the low-pressure space of the vacuum chamber after overcoming the mutual attraction between molecules, It is pumped away by vacuum pump to complete the separation from solid. Therefore, the double-cone rotary vacuum dryer has the following characteristics:

(1) In the process of vacuum drying, the pressure in the cylinder is always lower than the atmospheric pressure, the gas molecules are small, the density is low, and the oxygen content is low, so it can dry easily oxidized drugs and reduce the chance of material contamination.
(2) Because the temperature of the moisture content is proportional to the steam pressure during the vaporization process, the moisture content in the material can be vaporized at low temperature during vacuum drying to achieve low temperature drying, especially suitable for the production of drugs with heat-sensitive materials.
(3) Vacuum drying can eliminate the surface hardening phenomenon easily caused by atmospheric hot air drying. This is because the pressure difference between the inside and the surface of the vacuum drying material is large. Under the effect of pressure gradient, the water will quickly move to the surface without surface hardening.
(4) Due to the small temperature gradient between the inside and outside of the material during vacuum drying, the moisture can be moved and collected independently due to the reverse osmosis effect, effectively overcoming the dispersion phenomenon caused by hot air drying.