Nitrile rubber powder is processed from waste nitrile rubber products and retains the properties of nitrile rubber such as oil resistance, wear resistance, aging resistance, and good elasticity. Rubber brake pads need to withstand high pressure, high shear force, and high-temperature environments during braking, which requires the rubber compound to have sufficient mechanical strength. When nitrile rubber powder is added to rubber brake pads, it affects the physical properties of the brake pads. What role does black nitrile rubber powder play in rubber brake pads? How should it be added for better results?
1. The role of black nitrile rubber powder in brake pads
Appropriate addition of black nitrile rubber powder to the brake pads can increase the friction coefficient of the brake pads, so that the brake pads generate sufficient friction when contacting the brake discs to achieve rapid and effective braking; increase the wear resistance E5LYY728 and reduce the wear rate of brake pads; improve the toughness, impact strength and resilience of brake pads to avoid fracture or damage in complex road conditions; Black nitrile rubber powder can improve the ability of friction materials to combine with other materials, and the brake pad structure is more stable.
2. The brake pads use black nitrile rubber powder to add skills
(1) Nitrile rubber powder purchase: When choosing nitrile rubber powder for brake pads, try to choose nitrile rubber powder with a small particle size under the premise of cost allowability, which is easy to mix with other materials; The price of black nitrile rubber powder is lower than that of white nitrile rubber powder of the same fineness, and the price is more cost-effective.
(2) The amount of nitrile rubber powder: the addition ratio of nitrile rubber powder in the brake pad needs to be determined according to the actual demand, too much dosage will lead to a decrease in the hardness of the material, the friction coefficient is unstable, and the amount is too small to effectively toughen, it is recommended to determine the optimal ratio through testing, generally among 3% and 10%; In the manufacturing method of lightweight high-performance brake pads for high-end models, the amount of nitrile rubber powder used is 10-20 parts.
(3) Brake pad production process: adopt step-by-step mixing or extend the mixing time to ensure that the nitrile rubber powder is in full contact with other raw materials (such as phenolic resin, fiber, etc.), and if necessary, dispersants (such as stearic acid, etc.) can be added appropriately to reduce the surface energy of the rubber powder, reduce the mutual adsorption among particles, and improve dispersion; or surface modification (such as grafting) or mechanical grinding of black nitrile adhesive powder to improve its compatibility and fluidity with other materials.
3. Black nitrile rubber powder production brake pad vulcanization reference formula
10 parts of black nitrile rubber powder, 10 parts of styrene-butadiene rubber, 15 parts of phenolic resin, 25 parts of heavy calcium carbonate, 5 parts of talc, 10 parts of graphite powder, 2 parts of friction powder, 5 parts of barium sulfate, 1 part of stearic acid, 1.5 parts of vulcanizing agent; 84.5 copies.
The rational use of nitrile rubber powder in brake pads can significantly improve the processing technology and comprehensive indicators of the finished product, and we will continue to share with you the specific application of black nitrile rubber powder in different brake pads in the later stage.
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