What is a color masterbatch?

2023-09-25

Color masterbatch, also known as color masterbatch, is a new type of polymer material specific colorant, also known as pigment formulation.

It is composed of pigments or dyes, carriers, and additives. It is an aggregate obtained by uniformly loading a very large amount of pigment or dye into a resin, which can be called pigment concentration. Therefore, its coloring ability is higher than that of the pigment itself.

In short, a masterbatch is an aggregate made by uniformly loading a large amount of pigments or dyes into a resin.

What are the basic components of color masterbatches?

The basic components of color are:

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, polymer red, polymer 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

It is the matrix of the carrier masterbatch. Special color masterbatches generally use the same resin as the product resin as the carrier, with the best compatibility between the two, but also considering the fluidity of the carrier.

3. Dispersant

Promote uniform dispersion of pigments and prevent them from clumping. The melting point of dispersant should be lower than that of resin, with good compatibility with resin and affinity with pigments. The most commonly used dispersants are polyethylene low molecular wax and stearate.

4. Additives

Such as flame retardant, brightening, antibacterial, antistatic, antioxidant, etc. Unless requested by customers, color masterbatches generally do not contain the aforementioned additives.

What are the varieties and grades of color masterbatches?

The commonly used color classification methods are as follows:

Classified by carrier: such as PE masterbatch, PP masterbatch, ABS masterbatch, PVC masterbatch, EVA masterbatch, etc.

Classified by purpose: such as injection molding masterbatch, blow molding masterbatch, spinning masterbatch, etc.

Each variety can be divided into different levels, such as:

1. Advanced injection molding masterbatch: used for high-end products such as cosmetic packaging boxes, toys, and electrical casings.

2. Ordinary injection molding masterbatch: used for general daily plastic products, industrial containers, etc.

3. Advanced blow molding masterbatch: used for blow molding and coloring of ultra-thin products.

4. Ordinary blow molding masterbatch: used for blow molding coloring of general packaging bags and woven bags.

5. Spinning masterbatch: used for spinning and dyeing of textile fibers. Color masterbatch pigment has fine particles, high concentration, strong coloring power, good heat and light resistance.

6. Low grade color masterbatch: used to manufacture low-grade products with low requirements for color quality, such as trash cans, low-grade containers, etc.

7. Special color masterbatch:

It is based on the plastic variety specified by the user for the product, selecting a masterbatch made of plastic that is the same as the carrier. For example, PP masterbatch and ABS masterbatch respectively choose PP and ABS as carriers.

8. General masterbatch: A certain resin (usually low melting point PE) is also used as a carrier, but in addition to its carrier resin, it can also be used for coloring other resins.