The masterbatch is generally composed of three parts. The colorant carrier dispersant is kneaded by a high-speed mixer, crushed, and extruded into pellets. The masterbatch has high concentration, good dispersibility and cleanness during plastic processing. And so on.
What is a color master?
A masterbatch is an aggregate obtained by uniformly loading a super-constant pigment into a resin.
The use of color masterbatch has the following advantages:
1. Make the pigments have better dispersibility in the product. The color masterbatch must be refined during the production process to improve the dispersibility and tinting strength of the pigment. The carrier of the special color masterbatch has the same plasticity as the product, and has good matching property, and the pigment particles can be well dispersed in the plastic of the product after heating and melting.
2. It is beneficial to maintain the chemical stability of the pigment. If the pigment is directly used in the process of storage and use, the pigment will absorb water and oxidize. After the color masterbatch, the resin carrier will be pigment and air. Moisture isolation allows the quality of the pigment to remain unchanged for a long time.
3. The color of the stable color masterbatch is similar to that of the resin particles. It is more convenient and accurate in metering. It will not adhere to the container during mixing, and the mixing with the resin is more uniform. Therefore, the addition amount can be ensured, thus ensuring the stability. The color of the product is stable.
4. Protecting the operator's health pigments is generally powdery, easy to fly when added and mixed, and will affect the health of the operator when inhaled by the body.
5. Keep the environment clean
6. What are the basic ingredients of the easy-to-use masterbatch?
The basic components of the color masterbatch are:
1. Pigments or dyes are divided into organic pigments and inorganic pigments. Commonly used organic pigments are: phthalocyanine red, phthalocyanine blue, phthalocyanine green, fast red, macromolecular red, macromolecular yellow, permanent yellow, permanent Purple, azo red, etc. Commonly used inorganic pigments are: cadmium red, cadmium yellow, titanium white powder, carbon black, iron oxide red, iron oxide yellow, etc.
2. The carrier is the matrix of the masterbatch. The special color master generally selects the same resin as the carrier resin as the carrier, and the compatibility between the two is the best, but the fluidity of the carrier is also considered.
3. The dispersant promotes uniform dispersion of the pigment and no longer agglomerates. The melting point of the dispersant should be lower than that of the resin, have good compatibility with the resin, and have good affinity with the pigment. The most commonly used dispersants are: polyethylene low molecular waxes, stearates.
4. Additives such as flame retardant, brightening, antibacterial, antistatic, anti-oxidation, etc., unless the customer requests, in general, the color masterbatch does not contain the above additives.
What are the varieties and grades of the color master?
There are several commonly used classification methods for color masterbatch:
According to the carrier classification: such as PE masterbatch, PP masterbatch, ABS masterbatch, PVC masterbatch, EVA color masterbatch, etc. according to the purpose: such as injection color masterbatch, blown color masterbatch, spinning masterbatch. Each variety can be divided into different levels, such as:
1. Advanced injection color masterbatch is used in cosmetic packaging boxes, toys, electrical enclosures and other advanced products.
2. Ordinary injection color masterbatch is used for general daily plastic products, industrial containers, etc.
3. Advanced blown film masterbatch for blow molding coloring of ultra-thin products.
4. Ordinary blown film color masterbatch is used for blow molding coloring of general packaging bags and woven bags.
5. Spinning color masterbatch is used for textile fiber spinning and coloring. The masterbatch pigment particles are fine, the concentration is high, the tinting strength is strong, and the heat resistance and light resistance are good.
6. Low-grade color masterbatch is used to manufacture low-grade products that do not require high color quality, such as trash cans and low-grade containers.
How to distinguish between universal color masterbatch and special color masterbatch?
Dedicated color masterbatch: It is a masterbatch made of the same plastic as the carrier according to the plastic type specified by the user for the product. For example, PP color masterbatch and ABS color masterbatch respectively use PP and ABS as carriers.
Universal color masterbatch: A resin (often a low melting point PE) is also used as a carrier, but it can be applied to the coloration of other resins than its carrier resin.
The universal color masterbatch is relatively simple and convenient, but has many disadvantages. It is recommended that you use a special color masterbatch.
Why are many companies not producing universal color masterbatches?
Most formal color masterbatch companies in the world generally do not produce universal color masterbatches.
There are many disadvantages to the universal color masterbatch. In fact, the general purpose of the universal color masterbatch is very narrow, and the technical indicators and economic benefits are also poor. The specific performance is as follows:
1. Predictability of coloring effect The color masterbatch is used for coloring, and the pigment of the universal color masterbatch will exhibit different colors in different plastics, so the coloring effect is poorly predictable.
2. Affect other properties of plastic products, especially affecting strength, the product is easy to deform and twist, and it is more obvious to engineering plastics.
3. Higher cost The general color masterbatch is often used in a higher heat-resistant grade in order to be 'universal', resulting in waste.
In addition to coloring, can the color masterbatch also have the functions of flame retardant, brightening, antistatic, anti-oxidation and anti-ultraviolet rays?
The color masterbatch can have several of these functions at the same time, if the factory asks for this.
Sometimes, although the customer does not ask for it, the color master company will advise the user to add some additives depending on the needs of the product, such as adding certain additives such as brighteners to the color masterbatch. Of course, this will increase the cost of the product.
What is the heat resistance of the color masterbatch?
The heat resistance grade of the special color masterbatch is generally compatible with the plastic used for the product, and can be used with confidence at normal temperature.
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