When nitrile rubber or nitrile reclaimed rubber is used to produce rubber products with high adhesion requirements, the type and amount of compounding agents directly affect the adhesion of the rubber compound, especially the large amount of rubber filler. So in actual production, what impact will different types of rubber fillers have on the adhesion of nitrile rubber? How to choose suitable rubber fillers for nitrile rubber products that have strict requirements on adhesion?
1. The effect of different types of rubber fillers on the adhesion of nitrile
In the production process of nitrile rubber/reclaimed rubber products, different types of rubber fillers have different effects on the adhesion of nitrile rubber. In the same amount, the adhesion of nitrile rubber compound using channel carbon black, super abrasion-resistant carbon black, and high abrasion-resistant furnace black is lower, and the adhesion of nitrile rubber compound using semi-reinforced carbon black and thermal cracking carbon black Sex is better. When light-colored nitrile rubber products use white fillers, silica-reinforced nitrile rubber has poor adhesion, while nitrile rubber filled with activated calcium carbonate and clay has good adhesion.
In actual production, select white carbon black reinforced light-colored nitrile rubber product formula can add an appropriate amount of magnesium carbonate to improve the adhesion of nitrile rubber.
2. The effect of different amounts of rubber fillers on the adhesion of nitrile
Semi-reinforcing carbon black has dual functions of reinforcement and filling in the production of nitrile rubber/reclaimed rubber products. It can give the rubber high elongation, low heat generation, high elasticity, and improve the aging resistance of the nitrile rubber. It is widely used in all kinds of nitrile rubber 2LLYY1119 products. Under the condition that 100 parts of nitrile rubber is vulcanized with sulfur, the adhesiveness of nitrile rubber will first increase and then decrease with the increase of the amount of semi-reinforced carbon black. Generally, 50 parts of semi-reinforced carbon black are filled , Nitrile rubber compound can obtain better adhesion.
Under the condition that 100 parts of nitrile rubber is vulcanized with sulfur, the adhesiveness of the nitrile rubber compound using medium-particle thermal black carbon black will first decrease and then increase with the increase of the amount of carbon black. Generally, thermal cracking method When the amount of carbon black is about 75 parts, the adhesion of the nitrile compound is relatively poor. When nitrile rubber products use thermal cracking carbon black, the amount of carbon black can be appropriately increased or decreased according to the mechanical performance requirements of the product.
Many rubber materials in nitrile rubber/reclaimed rubber products need to be bonded to fiber materials and metal materials. A reasonable choice of rubber fillers can give the rubber good adhesion and higher structural strength, and ensure the performance and life of the rubber products. . In order to further improve the adhesion of nitrile rubber/reclaimed rubber, manufacturers can also directly use plasticizers or tackifiers, common ones are coumarone resin, dibutyl phthalate, coal tar, hydrogenated rosin, liquid Nitrile rubber, etc., the editor will discuss with you in detail later.
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