Natural rubber has good elasticity and high strength, and is widely used in transportation, medical and health, industrial agriculture, electronic appliances, construction engineering, life applications and other fields. However, the price of natural rubber is high and the price fluctuates greatly, so it is necessary to reduce the production cost of rubber products with natural rubber as the main raw material through scientific formula design. Xiaobian will share with you the key points of low-cost natural rubber vulcanization formula design today.
Designing vulcanization formulations for low-cost natural rubber products requires reducing the cost of rubber compounds without compromising product quality.
1. Natural rubber low-cost formula rubber raw material selection skills
(1) Choose cost-effective natural rubber: when producing rubber products with natural rubber as the main raw material, different varieties of natural rubber have differences in performance and price, and it is recommended to choose natural rubber varieties with high cost performance according to the specific performance needs of rubber products.
(2) Combined use with synthetic rubber: natural rubber and low-cost synthetic rubber can not only reduce the cost of raw rubber, but also improve the performance of rubber compounds. For example, the combination of natural rubber, styrene-butadiene rubber and butadiene rubber to produce automobile tires can further improve the wear resistance and anti-aging performance of tires.
(3) The use of sub-brand natural rubber: sub-brand natural rubber refers to a by-product formed by separating the natural rubber with lower yield and slightly worse quality through screening and classification in the process of natural rubber processing, and the price is much lower than that of natural rubber E4LYY116; Compared with natural rubber, the quality and performance of sub-brand natural rubber may be slightly different, but it still has some rubber elasticity and wear resistance. Therefore, some rubber products can use sub-brand natural rubber to replace standard natural rubber to reduce costs.
(4) The use of recycled rubber resources: the waste rubber is processed into reclaimed rubber, and reclaimed rubber powder is added to rubber products, which is the main way to reduce the production cost of rubber products. When designing low-cost natural rubber vulcanization formulas, the rational use of reclaimed rubber and reclaimed rubber powder can improve the processing technology performance and aging resistance of rubber compounds while reducing costs.
2. Key points of the design of the vulcanization system of low-cost vulcanization formula for natural rubber
The variety and dosage of vulcanizing agent are directly related to the performance and cost of natural rubber, and natural rubber product manufacturers need to optimize the dosage of vulcanizing agent according to the specific needs of rubber products to achieve the best performance and cost balance; At present, the most commonly used sulfur-accelerator system for natural rubber products is the sulfur-accelerator system.
3. Key points of the design of natural rubber low-cost vulcanization formula filler system
Carbon black is a commonly used filler in rubber products, and different varieties of carbon black have great differences in performance and price. When designing a natural rubber vulcanization formula, it is necessary to select the appropriate carbon black variety according to the performance requirements of the product and optimize its dosage. In general, high wear-resistant carbon black can improve the wear resistance of rubber, but the price is higher; The price of general-purpose carbon black is relatively low, but the performance is also slightly inferior; A variety of carbon blacks can be used in natural rubber vulcanization formulations to reduce costs while maintaining performance.
Proper use of calcium carbonate, clay, talcum powder and other fillers and appropriate adjustment of their dosage can replace carbon black to a certain extent, or increase the volume of products, and then achieve the purpose of reducing costs.
4. Key points of the design of the softening system of low-cost vulcanization formula for natural rubber
The price of petroleum-based softeners such as aromatic oil and naphthenic oil is relatively low, which can reduce costs to a certain extent. When choosing petroleum-based softeners for the vulcanization formula of natural rubber products, it is necessary to pay attention to the influence of this type of rubber oil on rubber properties, such as tensile strength, hardness, aging resistance, etc.
In addition, vegetable oil softeners such as soybean oil and corn oil are relatively expensive, but they have the advantages of environmental protection and renewable. In some products with high environmental requirements, vegetable oil softeners can be considered.
The design of low-cost natural rubber vulcanization formula needs to comprehensively consider the factors of raw rubber, filler, softener, vulcanization system and other aspects, and reduce costs and improve the competitiveness of enterprises by optimizing the composition of the formula and the control of the production process, under the premise of ensuring product performance.
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