Development Trend of Rubber Auxiliary Masterbatch
Pre-dispersion of rubber additives has been proposed in the 1940s. Industrial production began in the 1980s, and large-scale industrial production began in the mid-1990s. After 2003, it was gradually recognized by everyone. At that time, there were only a few foreign-owned factories in the country. After 2008, domestic factories started to start and gradually increased.
1. Why is the pre-dispersion of rubber additives a development trend?
Rubber additives are chemicals that add value to rubber products and reduce costs. However, the traditional rubber additives will not only generate a large amount of dust and toxic and harmful gases during use, which will cause great harm to the environment and the health of operators, but also have poor compatibility with rubber, making it difficult to uniformly disperse and affect the use. its use effect.
2. Pre-dispersed definition of rubber additives
Rubber additive pre-dispersion, also known as rubber additive masterbatch. Pre-dispersed rubber additives take polymers (usually EPDM, SBR, NBR, EVA) as a carrier, add rubber additives and softeners, and pre-disperse traditional rubber additives into polymers through a special process to obtain a uniform concentration of Pre-dispersed (extrusion granulation). Predispersed rubber additives are upgraded products of traditional rubber additives. They are dust-free, easy to disperse, suitable for automatic weighing and automatic continuous low temperature mixing, improve mixing efficiency, and have good storage stability. Widely used in rubber products.
3. What are the advantages of pre-dispersion of rubber additives?
1）Environmental protection. Avoid workshop dust pollution and protect workers’ health.
2） Good dispersibility and uniformity.
3） Good compatibility with rubber materials can save mixing time.
4）Easy to weigh, suitable for continuous automation, easy to transport and store.
5）There is no loss in the processing process, and the quality is stable between batches.
6）Good prospects for development. The pre-dispersed rubber additive masterbatch is mainly used for high-quality precision products in our country, such as high-grade rubber shoes, automobile rubber products and high-quality rubber pipe fittings. In the field of automotive applications, my country’s tire companies have successively introduced a number of radial tire production lines. These lines have begun to use pre-dispersed rubber masterbatch products for increased automation. With the improvement of tire radial rate in my country, pre-dispersed rubber masterbatch still has a lot of room for growth in the future. Deep processing of existing powder and liquid additives is an inevitable trend in the development of rubber additives.
4. The main components of pre-dispersed rubber additives
1）Rubber additives: It is the main raw material of pre-dispersed rubber additives, and its quality directly affects the quality of pre-dispersed rubber additives, generally 40%-80%.
2）Carrier: The choice of carrier is very important for the production of pre-dispersed rubber additive masterbatch particles/master films. Attention should be paid to the solubility of the rubber additive in the carrier and the compatibility of the carrier with the rubber.
3）Additives: Additives for predispersed rubber additive masterbatch particles/master films include plasticizers, lubricants and anti-blocking agents. These additives can improve the dispersion and storage stability of rubber additives in the rubber (carrier), improve the quality of extrusion appearance, and prevent adhesion between predispersed rubber additives.