In the production process, the styrene-butadiene rubber of the sub-brand styrene-butadiene rubber has the basic performance characteristics of genuine styrene-butadiene rubber, and the price is low, which can replace the genuine styrene-butadiene rubber in the production of rubber products, effectively reducing the cost of raw materials. In actual production, what fields can the sub-brand styrene-butadiene rubber be used in? What problems should be paid attention to when using sub-brand styrene-butadiene rubber?
1. The application field of sub-brand styrene-butadiene rubber
Sub-brand styrene-butadiene rubber is mainly used to replace genuine styrene-butadiene rubber or natural rubber to reduce costs, and has a wide range of applications in asphalt modification, plastic modification, and rubber products. In actual production, the sub-brand styrene-butadiene rubber can be used alone or in combination with genuine styrene-butadiene rubber, natural rubber, butadiene rubber, etc. to produce tire tread rubber, sidewall rubber, as well as hoses, tapes, rubber roller seals, rubber soles, wire and cable skins, special-shaped miscellaneous parts, etc.
2. Sub-brand styrene-butadiene rubber processing and matching
(1) Processing points
When the sub-brand styrene-butadiene rubber is mixed, it is generally necessary to increase the number of thin passes and carry out supplementary processing; When the mixing process is carried out in the internal mixer, two-stage mixing can be used; Strictly control the mixing temperature and time and other parameters to ensure uniform mixing, and avoid rubber scorching or performance degradation due to too high temperature or too long mixing time. During the molding process, the molding temperature should be reasonably controlled according to the E4LYY819 characteristics of the sub-brand styrene-butadiene rubber and the mold material to prevent rubber scorching or poor molding. The higher the vulcanization temperature in the vulcanization process, the shorter the vulcanization time, but too high a temperature may lead to aging or scorching of the rubber; Appropriate application of vulcanization pressure to improve the compactness and dimensional stability of the product.
(2) Formula design
When sub-brand styrene-butadiene rubber produces rubber products, the sulfur-accelerator system is generally used, and the amount of vulcanization is less than that of natural rubber, and the amount of accelerator is appropriately increased. The rational use of carbon black reinforcement can effectively improve the mechanical strength of styrene-butadiene rubber vulcanized rubber; Fill with calcium carbonate, clay, talcum powder, etc. The commonly used softeners in the production of styrene-butadiene rubber products include coumaron resin, pine tar, petroleum-based softeners, etc.
(3) Storage matters: Sub-brand styrene-butadiene rubber is generally packaged in composite bags or polypropylene woven bags, and is generally stacked in rows in a room temperature, ventilated, clean and dry place; Protect from direct sunlight and rain during transportation.
The appearance of the sub-brand styrene-butadiene rubber 1502 is light yellow strip-shaped, and the performance indicators are basically the same as that of genuine styrene-butadiene rubber, with excellent heat resistance, weather resistance, chemical stability, aging resistance and tear resistance. It can be used in combination with styrene-butadiene rubber to reduce costs, and can also replace 50% genuine styrene-butadiene rubber or natural rubber on a one-to-one basis. It has a wide range of applications in asphalt modification, plastic modification, and rubber products. Hongyun provides free samples for trial. Dozens of enterprises can reduce the cost of raw materials by more than 30% after use.
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