Masterbatch is the super constant pigment (dye) uniform load attached to the resin and aggregates. Mainly by the chemical additives, excess carrier resin and dispersant.
Generally consists of organic pigments, such asphthalocyanine green; inorganic pigments such as red iron oxide, titanium dioxide; dye vat pink, disperse orange etc..Polyolefin, PVC masterbatch is used in pigments, dyes can not be used for general polyolefin color, otherwise it will cause serious migration.
Polyethylene wax can be used as the carrier of pigment concentration, pigment dispersed in the polyethylene wax can be no spot color on the PVC, can also be used for polyamidecoloring, while improving the demoulding. Polyethylene waxhas been proved to be the pigment with excellent adhesivepolymer particles, but also high-speed mixer produces clean,no agglomeration, good binder pigment concentration and easy flow of the.
The carrier resin
The pigment distribution and make the color masterbatchgranular. Select the carrier need to consider and be colored resin compatibility, but also consider the masterbatch should have good dispersion, so the mobility carrier should be greater than be colored resin, also be the colored product quality is not affected. Such as using the same kind ofpolymer melt index is larger, the masterbatch melt index is higher than is a polymer, to ensure that the final product color consistency. PE, PP Color Masterbatch choose LDPE (low density polyethylene) resin as carrier, PS, ABS masterbatchchoose modified PS as carrier.
The main wetting on the surface of the pigment, is conducive to the further dispersion of pigments, and stable in resin, alsohave good compatibility with resin, does not affect thecoloring product quality. Polyolefin masterbatch dispersantwith low molecular weight polyethylene wax or zinc stearate.Engineering plastics masterbatch dispersant generally usepolar low molecular weight polyethylene wax, magnesium stearate, calcium stearate.