Masterbatch is a new product for coloring plastics and fibers developed in the 1960s. It is a polymer compound obtained by uniformly attaching pigments in excess amounts to resins.

The full name of masterbatch is masterbatch, also called color seed. It is a new type of colorant for polymer materials, also known as pigment preparation. Masterbatch is mainly used on plastics. It is composed of three basic elements: pigment or dye, carrier and additive. It is an aggregate obtained by uniformly attaching excess amounts of pigments to resins. It can be called pigment concentrate, so its coloring power is higher than the pigment itself. When processing, a small amount of masterbatch and uncolored resin can be mixed to achieve the coloring resin or product with the designed pigment concentration.

Basic ingredients

1. Pigments or dyes

Pigments are divided into organic pigments and inorganic pigments. Commonly used organic pigments include: phthalocyanine red, phthalocyanine blue, phthalocyanine green, fast red, macromolecular red, macromolecular yellow, permanent yellow, permanent purple, azo red, etc. Commonly used inorganic pigments include: cadmium red, cadmium yellow, titanium dioxide, carbon black, iron oxide red, iron oxide yellow, etc.

2. Carrier

The carrier 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

To promote the uniform dispersion of the pigment and no longer agglomerate, 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 and stearate.

4. Additives

Such as flame retardant, brightening, antibacterial, antistatic, antioxidant and other varieties, unless the customer requires, masterbatch generally does not contain the above additives.

Advantages

1. Make the pigment have better dispersibility in the product. The pigment must be refined during the masterbatch production process to improve the dispersibility and coloring power of the pigment. The carrier of the special masterbatch is the same as the plastic variety of the product, with good matching. After heating and melting, the pigment particles can be well dispersed in the plastic of the product.

2. It is conducive to maintaining the chemical stability of the pigment. If the pigment is used directly, the pigment will absorb water and oxidize due to direct contact with the air during storage and use. After the masterbatch is made, the resin carrier isolates the pigment from the air and moisture, which can keep the quality of the pigment unchanged for a long time.

3. Ensure the stability of the product color. The masterbatch particles are similar to the resin particles, which are more convenient and accurate in measurement. They will not adhere to the container during mixing, and the mixing with the resin is also more uniform. Therefore, the stability of the added amount can be guaranteed, thereby ensuring the stability of the product color.

4. Protect the health of operators. Pigments are usually powdered and easily fly when added and mixed. If inhaled by the human body, it will affect the health of operators.

5. Keep the environment clean.

6. Easy to use.