Color masterbatch used color masterbatch technology must pay attention to the collocation relationship between color material and plastic raw materials, additives, its selection points are described as follows.

1, color material can not react with resin and various auxiliaries, strong solvent resistance, small migration, good heat resistance, etc.

In other words, the masterbatch cannot be involved in various chemical reactions. For example, carbon black can control the curing reaction of polyester plastics, so carbon black material can not be added to polyester.

Color masterbatch technology because plastic products molding processing temperature is higher, so the color should not decompose under the condition of molding heating temperature discoloration.

Generally, inorganic pigments have good heat resistance, while organic pigments and dyes have poor heat resistance, which should be paid enough attention to in the selection of color varieties.

2, the dispersion of the color material, coloring force should be good.

When the color dispersion is not uniform, it will affect the appearance performance of the product; When the coloring force of the color material is poor, the amount of color material will increase and the material cost will increase. The dispersibility of the same color material in different resins is not identical with the color power, so we should pay attention to this point when choosing the color material. The particle size of the color material is also related to the dispersion. The smaller the particle size of the color material, the better the dispersion and the stronger the coloring power. Master batch technology requires very strict, generally adopted master batch technology is wet process. Color master grain by water phase grinding, phase transformation, water washing, drying, granulation, only in this way the quality of the product can be guaranteed.

There are four kinds of master batch technology process

(1) master batch technology process ink method: as the name suggests, is the adoption of the production method of ink paste in the production of master batch, that is, through three roller grinding, coated with a layer of low molecular protective layer on the surface of the pigment. The ground fine color paste is then mixed with the carrier resin, which is then plasticized by a two-roll plasticizer (also known as a two-roll open mixer) and finally granulated by a single or twin-screw extruder.

(2) master batch technology flushing method: pigment, water and dispersant through sand grinding, so that the pigment particles are less than 1μm, and through the phase transfer method, so that the pigment into the oil phase, and then dry the master batch. Phase conversion requires the use of organic solvents, and the corresponding solvent recovery device.

(3) Color master batch technology kneading method: After mixing pigments with oil carrier, the pigment can be washed from water phase into oil phase by kneading using the characteristic of oil affinity of the pigment. At the same time, the surface of the pigment is covered by the oily carrier, so that the pigment dispersion and stability, prevent the pigment condensation.

(4) Master batch technology metal soap method: Is the pigment after grinding the particle size of about 1μm, and at a certain temperature added soap, so that each pigment particles surface layer is evenly moistened by soap, forming a layer of saponification liquid, when the metal salt solution is added followed by the chemical reaction of saponification layer on the pigment surface to produce a layer of metal soap protective layer (magnesium stearate), In this way, the pigment particles after grinding will not cause flocculation phenomenon, and protect a certain fineness.