Masterbatch, also known as masterbatch, is a new type of colorant specially used for polymer materials, also known as pigment preparation. Masterbatch is mainly used in plastics. Masterbatch is composed of three basic elements: pigment or dye, carrier and additive. It is an aggregate obtained by uniformly loading an extraordinary amount of pigment into the resin, which can be called pigment concentrate. Therefore, its coloring power is higher than that of the pigment itself. During processing, a small amount of masterbatch is mixed with uncolored resin to achieve a colored resin or product with the designed pigment concentration.
Basic ingredients of masterbatch：
1. Pigments or dyes
Pigments are divided into organic pigments and inorganic pigments
Common organic pigments include: phthalocyanine red, phthalocyanine blue, phthalocyanine green, fast red, macromolecular red, macromolecular yellow, permanent yellow, permanent purple, azo red, etc. Common inorganic pigments include: cadmium red, cadmium yellow, titanium dioxide, carbon black, iron oxide red, iron oxide yellow, etc.
2. Carrier
It is the matrix of the masterbatch. Special masterbatch generally chooses the same resin as the product resin as the carrier, and the compatibility of the two is the best, but the fluidity of the carrier should also be considered.
3. Dispersant
It promotes the uniform dispersion of the pigment and no longer agglomerates. The melting point of the dispersant should be lower than that of the resin, and it has good compatibility with the resin and good affinity with the pigment. The most commonly used dispersants are: polyethylene low molecular wax, stearate.
4. Additives
Such as flame retardant, brightening, antibacterial, antistatic, antioxidant and other varieties, unless the customer requires it, the masterbatch generally does not contain the above additives.
In short, masterbatch is plastic pigment particles, which makes plastic products colorful.
