Why do PPR pipes need to add color master batch?

The colors of PPR water pipes extrusion line are different. In addition to the common white and green, there have also gray, blue, orange, etc. The color of the pipes is customized according to their needs. The reason is that different colors of "master batch" are added during the production of pipes. So what is color master batch and what does it do?

1. What is master batch?

Master batch is a high-concentration pigment or colorant, usually in the form of particles or powder, and mainly includes three parts: carrier, colorant, and auxiliary.
The carrier is an important component of the color master batch. Its main function is to carry the colorant and then disperse and fuse into the plastic that needs to change the color. The colorant is the most critical part of the color master batch, which makes the color master batch show different color.The additive content is small, which is to generally help the colorant disperse or obtain some special properties, such as antioxidant, light stability, etc.

2. Why add color master batch?

Virgin PPR raw materials are actually colorless and transparent without any color.  Since they are not covered by light after being made into water pipes,, it will be easier to produce algae and bacteria in the water pipes,which will pollute the water quality and also accelerate water pipes life. Therefore, according to the requirements of national standards, color master batch must be added in the production of PPR water pipes so that the water pipes can obtain good light-shielding properties.

3. Is the master batch healthy and environmentally friendly?

Safe and environmentally friendly PPR tube master batch is usually made of food-grade or medical-grade pigments and carrier materials. These pigments meet health and safety standards and do not contain toxic substances, so choosing reliable manufacturers and suppliers can ensure the safety of master batch used.

In addition, when processing PPR pipes, color master batch should be added to polypropylene under appropriate conditions to ensure uniform color distribution and no release of harmful substances. Quality control of the production process is also important to product safety.

In addition, for PPR water pipes, the hiding power of the master batch is a very important parameter, which determines the light-shielding performance of the water pipe. The light-shielding performance also means the ability of reducing the growth of algae and bacteria in the water pipe.

It can be seen that color master batch is of great significance to PPR pipes. It can not only be used for color distinction, but also enhance the light-shielding performance of the pipe and avoid bacterial growth. It is one of the indispensable raw materials for pipe production.