Natural rubber has high elasticity and strength, and can be used in the production of various types of rubber products through appropriate matching and vulcanization to meet different needs. In actual production, natural rubber products vulcanization system, reinforcement filling system, softening system, anti-aging system and other matching system with the agent varieties directly affect the product performance and service life. So what rubber additives are commonly used in natural rubber? How to match the agent with a more reasonable?
1. Vulcanization system rubber products industry commonly used vulcanizing agent, crosslinking agent has sulfur, sulfur giving body, organic peroxide, carbamate, maleimide, etc.. The use of natural rubber production of rubber products, sulfur vulcanization system is more widely used. Natural rubber sulfur vulcanization system in addition to sulfur, but also with the use of accelerators, active agents. Commonly used accelerators are mainly divided into thiazole accelerators, sulfonamide accelerators, thiuram accelerators and guanidine accelerators, etc.; active agents mainly use zinc oxide and stearic acid.
2. Reinforcement filling system in the actual production, carbon black is the most common reinforcing agent in the rubber products industry, calcium carbonate is a larger amount of filler. Selection of natural rubber reinforcing filler system, commonly used carbon black, white carbon black reinforcing, as well as calcium carbonate, clay, talcum powder, silica-aluminum carbon black and other non-reinforcing filler; part of the rubber products will also be filled with recycled rubber powder reinforcing. General black, dark natural rubber products reinforced with carbon black-based, white, light-colored, colored natural rubber products can be used instead of white carbon black carbon black reinforcement.
3. Softening system rubber softener is to soften the rubber, improve the plasticity and fluidity of the rubber, and improve the processing performance of the rubber. Natural rubber products production, softening system to pine tar and three lines of oil-based, but also can use rosin, Gumarone resin 2YLYY1022WFM or paraffin wax, you can choose a softening agent, rubber oil, but also two or more products and can be used to further harmonize the interaction between the processing properties and physical and mechanical properties of natural rubber.
4. Anti-aging system of natural rubber aging resistance is poor, which is one of its fatal flaws. The use of natural rubber in the production of rubber products, the choice of suitable varieties of antioxidants to extend the service life of the product is of great significance. In actual production, amine antioxidants in the p-phenylenediamine products in the natural rubber protection effect is better, common 4010, 4020, 4010NA, etc., followed by phenolic antioxidants.
5. Special with the system of natural rubber can be used for foamed rubber products such as sponge foam board, sponge soles and other production, or with flame retardants to prepare flame-retardant, flame-retardant rubber products, and so on.