How is the high thermal stability of black masterbatch achieved through formula design?
Publish Time: 2024-12-26
The high thermal stability of black masterbatch is achieved through fine formula design, which involves multiple aspects such as raw material selection, ratio optimization and rational use of additives.
Black masterbatch is an important plastic colorant, and its main components include pigments, resin carriers, processing aids and anti-aging agents. Among them, the selection of pigments is crucial to the color performance and heat resistance of black masterbatch. Carbon black, as a commonly used pigment in black masterbatch, is widely used due to its good tinting power and hiding power. However, in order to make black masterbatch have high thermal stability, further optimization is needed in formula design.
The selection of resin carrier has an important influence on the dispersibility, compatibility and stability of black masterbatch. In order to improve the high thermal stability of black masterbatch, resins with good thermal stability and strong weather resistance are usually selected as carriers, such as polyethylene (PE) and polypropylene (PP). These resin carriers are not easy to decompose at high temperatures, and can keep the structure of black masterbatch stable, thereby improving its heat resistance.
In addition to pigments and resin carriers, processing aids are also one of the key factors affecting the high thermal stability of black masterbatch. Processing aids include dispersants, lubricants, antioxidants, etc., which can improve the processing performance of black masterbatch and the performance of the final product. Dispersants can help carbon black pigments disperse evenly in the resin carrier to avoid agglomeration, thereby improving the color uniformity and heat resistance of black masterbatch. Lubricants can reduce the friction resistance of black masterbatch during processing and improve production efficiency. Antioxidants can prevent black masterbatch from oxidative decomposition at high temperatures and extend its service life.
Anti-aging agents are an indispensable part of the high thermal stability formula of black masterbatch. Anti-aging agents can absorb or reflect ultraviolet rays, inhibit the generation of free radicals, and prevent the oxidation chain reaction, thereby effectively delaying the aging process of black masterbatch. In a high-temperature environment, the role of anti-aging agents is particularly prominent. It can protect black masterbatch from the influence of high-temperature oxidation and maintain its bright color and stable performance.
In the process of formula design, the ratio of raw materials also needs to be optimized. Reasonable proportions can make the components work together to improve the overall performance of black masterbatch. For example, appropriately increasing the content of carbon black can improve the hiding power and color saturation of black masterbatch, but too much carbon black may increase the viscosity of the system and affect the processing performance. Therefore, it is necessary to reasonably control the content of carbon black while ensuring color and heat resistance.
In summary, the high thermal stability of black masterbatch is achieved through sophisticated formula design. In the formula design, it is necessary to comprehensively consider the selection and proportion of pigments, resin carriers, processing aids and anti-aging agents, and optimize the interaction between the components to make black masterbatch have excellent heat resistance and color performance.
