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Color masterbatch generally consists of three parts, colorant carrier dispersant, after mixing by high-speed mixer, crushing, extrusion pull into pellets, masterbatch in the plastic processing process, with high concentration, good dispersion, clean And other significant advantages.
What is a masterbatch?
Masterbatch is an aggregate made by uniformly loading an ultra-constant amount of pigment into a resin.
The use of masterbatch has the following advantages:
1. Make the pigments have better dispersion in the product. The pigment must be refined during the production process to improve the dispersibility and coloring power of the pigment. The carrier of the special color masterbatch is the same as the plastic type of the product and has a good match. The pigment particles can be well dispersed in the plastic of the product after heating and melting.
2. It helps to maintain the chemical stability of the pigment. When 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 color masterbatch is prepared, the resin carrier will mix the pigment and air. Moisture isolation, can make the quality of pigments long-term unchanged.
3. The stable color masterbatch particles are similar to the resin particles to ensure the color of the product. It is more convenient and accurate in measurement. It will not adhere to the container during mixing, and the mixture with the resin is also more uniform. Therefore, the stability of the additive amount can be guaranteed, thereby ensuring Product color stability.
4. Protecting the operator's health Pigments are generally powdery, easy to fly when they are added and mixed, and will affect the health of operators when inhaled.
5. Keeping the environment clean
6. What are the basic ingredients for using the convenient masterbatch?
The basic composition of masterbatch is:
1. Pigments or dyes Pigments are divided into organic pigments and inorganic pigments Commonly used organic pigments are: phthalocyanine red, phthalocyanine blue, phthalocyanine green, fast red, macromolecule red, macromolecular yellow, permanent yellow, permanent Purple, azo red and so on. Commonly used inorganic pigments are: cadmium red, cadmium yellow, titanium dioxide, carbon black, red iron oxide, yellow iron oxide, etc.
2. The carrier is the matrix of the masterbatch. The special masterbatch generally chooses the same resin as the product resin. The compatibility of the two is best, but at the same time, the fluidity of the carrier must also be considered.
3. The dispersant promotes uniform dispersion of the pigment and no longer coagulates. The dispersant should have a lower melting point than the resin, good compatibility with the resin, and a good affinity for the pigment. The most commonly used dispersants are: polyethylene low molecular waxes, stearates.
4. Additives such as flame retardant, brightening, antibacterial, anti-static, anti-oxidation and other varieties, unless the customer requests, normally do not contain the above additives in the masterbatch.
What color classification and grade?
Color master classification methods are commonly used as follows:
According to carrier classification: such as PE masterbatch, PP masterbatch, ABS masterbatch, PVC masterbatch, EVA masterbatch, etc. According to the use of categories: such as injection masterbatch, blow masterbatch, spinning masterbatch and so on. All varieties can be divided into different levels, such as:
1. Advanced injection masterbatch for cosmetic packaging, toys, electrical enclosures and other advanced products.
2. Ordinary injection masterbatch is used for general daily plastic products, industrial containers and so on.
3. Advanced blown film masterbatch is used for blow molding of ultrathin products.
4. Ordinary blown film masterbatch is used for blow molding of general bags and woven bags.
5. Spinning masterbatch is used for spinning fiber spinning. The pigment masterbatch has fine particles, high concentration, strong coloring power, good heat resistance and light resistance.
6. Low-grade color masterbatch is used to manufacture low-grade products with low requirements on color quality, such as trash cans and low-grade containers.
How to distinguish between universal masterbatch and special masterbatch?
Special Color Masterbatch: It is a masterbatch made of the same plastic as the carrier, based on the plastic type specified by the user for the product. Such as PP color masterbatch, ABS masterbatch were selected PP, ABS as a carrier.
General Color Masterbatch: A resin (usually a low melting point PE) is also used as a carrier, but it may be suitable for coloration of other resins than its carrier resin.
General color masterbatch is relatively simple and convenient, but the disadvantages are more, it is recommended that you use a special masterbatch.
Why do not many companies produce universal masterbatch?
Most of the world's regular masterbatch companies generally do not produce universal masterbatches.
Universal masterbatch has many shortcomings. In fact, the general color masterbatch's 'universal' range is very narrow and its technical indicators and economic benefits are also poor.
1. Predictive poor color masterbatch is used for coloring, universal masterbatch pigments will show different colors in different plastics, so the predictability of the coloring effect is poor.
2. Affect the other properties of plastic products, especially the impact strength, the product is easily deformed, distorted, more obvious for engineering plastics.
3. The higher cost Universal masterbatch To be able to 'common', often choose a higher heat-resistant grade of pigment, causing waste.
In addition to coloring, color masterbatch can also have flame retardant, brightening, anti-static, anti-oxidation, anti-ultraviolet and other functions?
Masterbatch can have some of these functions at the same time, if the factory makes this request.
Sometimes, although the customer does not ask for it, the parent company will also advise the user to add some auxiliaries depending on the needs of the product, such as adding certain additives such as brighteners to the masterbatch. Of course, this will increase the cost of the product.
How is the heat resistance of masterbatch?
The heat-resistance grade of the special masterbatch is generally compatible with the plastic used for the product, and it can be used safely at normal temperature.