Views: 445 Author: Site Editor Publish Time: 2022-05-26 Origin: Site
In daily life, various plastic products have different colors, such as red, yellow and black and so on. And color masterbatch is the commonly used colorant in the plastics. In this article, we will share with you the functions of the color masterbatch products in material processing.
What are the functions of color masterbatch in material processing?
We know that the pigment will directly contact with the air during storage and use, and it will absorb moisture, oxidize, agglomerate etc. If you direct use, it will cause color spots on the surface of the plastic product, and the hue will be dark, the color is easy to fade, and it will cause dust fly when mixing, which will affect the health of operators. In the production process, the color masterbatch granules have been mechanically processed to refine the pigments. The pigments are fully mixed with resin carriers and dispersants to isolate the pigments from air and moisture, which can maintain the chemical stability of the pigment. Thereby it can enhance the weather resistance of the pigments and improve the dispersibility and tinting ability of the pigment, so, the hue is bright.
In addition, it can ensure the stability of the plastics color. Since the color master batch and the resin particles have similar in shape, it is more convenient and accurate in measurement, and they are not easy to adhere to the container in the process of mixing, which can guarantee the stability of the addition amount and the stability of the product color. And it can save the time of cleaning the container and the machine. The working time and labor will be saved.
How to determine the use ratio of color masterbatch in processing?
The basis for determining the proportion of coloring masterbatch is to obtain a satisfactory coloring effect. As long as the surface tone of the product is uniform and there are no streaks and spots, it can be approved. The use ratio of coloring master batch can be selected as follows:
1:100 - Generally, the customers are not recommended to use this ratio. Unless the mixing performance of the equipment is very good, otherwise uneven pigment dispersion is likely to occur. However, due to price pressure, some customers particularly want to use this ratio of color masterbatch particles. For the sake of customers, color masterbatch manufacturers also produce more concentrated color masterbatches with such a low ratio, and the dispersibility of the pigments can generally meet the requirements.
1:50 is used for plastic products with general coloring requirements. PE and PP color masterbatches are more used in this ratio.
1:33-1:25 is used for PO products with higher coloring requirements, and ABS products with lower coloring requirements or general requirements.
1:20 is often used for advanced plastic products, including PO, ABS, and can be widely used in injection molding, blow molding, spinning and other processes.
Above 1:20 - Generally this ratio is used for coloring of high-grade cosmetics containers, and mostly used for small injection molding machines.