Dry goods sharing

· Dry goods sharing·

What is a masterbatch?

Speaking of masterbatch, many people may not know what it is, but the application of masterbatch can be seen everywhere in life. So what is the raw material of the masterbatch?

Generally speaking, color masterbatch is a colored plastic particle that is granulated by the manufacturer after mixing resin raw materials and pigment additives. Its main function is to color. Because it has been mixed with the matrix resin uniformly, the user directly mixes with the matrix resin and other Blending of additives can obtain colored plastic products. Namely: Masterbatch is the raw material of plastic colorant.

01Why use color masterbatch?

Advantages of color masterbatch

1. Make the pigment have better dispersibility in the product

In the production process of color masterbatch, the pigment must be refined to improve the dispersibility and tinting strength of the pigment. The carrier of the special color masterbatch is the same as the plastic of the product, and it has good matching. After heating and melting, the pigment particles can be well dispersed in the product plastic.

2. 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 color masterbatch is made, the resin carrier separates the pigment from the air and moisture, which can make the quality of the pigment long-term Change.

3. Ensure the stability of the product color

The masterbatch particles are similar to the resin particles, which are more convenient and accurate in metering. They will not stick to the container during mixing, and the mixing with the resin is more uniform. Therefore, the stability of the addition amount can be ensured to ensure the stability of the product color.

4. Protect the health of operators

Because the pigments are in direct contact with the air during storage and use, they will absorb moisture, oxidize, agglomerate, etc., direct use will cause color spots on the surface of the plastic product, the hue will be dark, the color will fade easily, and cause dust when mixed , Affect the health of operators.

5. Keep the environment clean

The shape of the masterbatch is similar to that of the resin particles, so it is more convenient and accurate in measurement. It will not stick to the container during mixing, so it saves the time of cleaning the container and the machine and the raw materials used for the cleaning machine.

6. Easy to use

02 Masterbatch technology process

The commonly used masterbatch technology is a wet process. The color masterbatch is made by water phase grinding, phase inversion, water washing, drying, and granulation. Only in this way can the product quality be guaranteed.

In addition, while the pigment is being ground, a series of masterbatch technology tests should be carried out, such as measuring the fineness of the sand slurry, measuring the diffusion performance of the sand slurry, measuring the solid content of the sand slurry, and measuring the fineness of the color slurry, etc. project.

03Performance requirements of masterbatch

Performance requirements of masterbatch

Polypropylene is a pure hydrocarbon. The molecular chain contains tertiary carbon atoms. It is easy to crack at the tertiary carbon atoms after being heated and light, which will deteriorate the quality of polypropylene. Therefore, it is required that the masterbatch be made in high-temperature spinning. It is easy to diffuse, does not damage the quality of the fiber, does not make the fiber fade, has excellent light resistance, abrasion resistance, and solvent resistance, and can withstand strict spinning and drafting.

(1) The most basic requirement for the pigments used in the heat-resistant masterbatch to withstand the temperature during the production of polypropylene fiber and maintain the stability of its performance. The temperature resistance is generally required to be above 270~280℃.

(2) The pigment used for dispersible masterbatch should have good dispersibility and be evenly dispersed in the masterbatch, and the dispersant used should not reduce the quality of polypropylene fiber. Otherwise, it will not be able to produce high-quality dope-colored fibers, and the operation will be unstable, and it will be easy to break or produce abnormal fibers when the fibers are drawn.

(3) There are many uses for the coloring of lustrous polypropylene stock solution. Among them, it is used for bed cover base fabrics and knitted fabrics, which require bright colors. Because organic pigments are brighter and brighter, and easy to color, organic pigments should be used for the above-mentioned purposes.

(4) Light fastness masterbatch. Some pigments have photosensitivity under the action of light, which can make the colored fiber fade and brittle. The light fastness of the pigment is basically related to its chemical structure, so pay attention to the pigment when making the masterbatch. When using light-fast pigments, you can consider adding ultraviolet absorbers.

(5) The pigment used in the stable masterbatch must have excellent stability to the colored polypropylene fiber. It means that the pigment will not react with the fiber when the colored fiber polymer is exposed to heat, light or high temperature for a long time, and new chemical groups are formed to reduce the performance of the polymer. Therefore, the color masterbatch should use the purest possible pigment, without iron, copper, lead and other salt impurities, to ensure the excellent physical properties of the colored polypropylene fiber.

(6) Water resistance, dry cleaning resistance, oil resistance, colored polypropylene fiber products are inevitably washed with water or solvent dry cleaning during use, and they must come into contact with oils, especially when they are used on carpets, so the colorants used should have Good washing resistance, dry cleaning resistance and oil resistance.

With the continuous improvement of people’s living standards and the increasing development of the plastic industry, people’s requirements for the performance of plastic products are getting higher and higher. The plastic processing industry is more willing to use a variety of easy-to-operate masterbatches to reduce raw material costs, process costs, The purpose of improving production efficiency and giving different properties to plastic products.

Masterbatches have already penetrated our lives, and everyone must now have a basic understanding of masterbatches! For more exciting content, click on the bottom left to read the full text!

Disclaimer: This article is organized from the Internet, and the copyright belongs to the original author; if there is any infringement, please inform it in time and delete it after verification.