The nylon ply layer of the wire tire is located inside the inner tire body, closely adhering to the lining layer, extending from one bead to the other, covering the entire tire's circumference; Plyte layer rubber requires high adhesion, dynamic heat generation, and flexural resistance of the compound. It is generally made from natural rubber, styrene-butadiene rubber, or isoprene rubber as raw materials. Can tire reclaimed rubber be added? How much is appropriate?
1. Can nylon ply layer rubber for steel wire tires be mixed with tire reclaimed rubber to reduce costs?
(1) In terms of compatibility, tire reclaimed rubber is made from the rubber part of used tires, produced through crushing, desulfurization, filtration, and refining processes. Its main components include natural rubber, styrene-butadiene rubber, cis-butadiene rubber, and carbon black. It is highly compatible with the main raw material of nylon cord layer rubber for steel wire tires, and theoretically can be used together with natural rubber, styrene-butadiene rubber, or isoprene rubber to produce cord rubber.
(2) From a performance requirement perspective, nylon cord ply layer rubber for steel wire tires requires the compound to have good bonding strength, dynamic flexural resistance, low heat generation, and mechanical strength; The carbon black in tire reclaimed rubber can provide some reinforcement, and the vulcanized rubber network structure can supply the necessary elasticity and strength for tire cord rubber.
(3) From the processing technology perspective, nylon cord layer adhesive must meet core indicators such as adhesion, flexural resistance, and low heat generation; Tire reclaimed rubber has high plasticity and low Mooney viscosity, fast powder absorption during mixing, low discharge temperature, minimal shrinkage and uniform thickness during calendering and glue application, which facilitates dimensional stability in the fabric dipping-calendering process; Natural rubber containing reclaimed rubber has a reduced tendency to vulcanize and revert to its original form under high-temperature, prolonged vulcanization conditions.
(4) In terms of production cost, the price of tire reclaimed rubber is less than one-third of that of new rubber. Adding an appropriate amount of tire reclaimed rubber can effectively reduce the raw material cost of nylon cord layer rubber for steel wire tires; Tire reclaimed rubber can also improve the rubber processing process and reduce production energy consumption.
2. The amount of tire reclaimed rubber added to the nylon ply layer rubber for steel wire tires
Mixing tire reclaimed rubber into the nylon cord layer of steel wire tires can improve the performance of the rubber processing process, increase dimensional stability of finished products, and reduce raw material costs; However, excessive E6LYY14 ratio of reclaimed rubber can reduce the tensile strength and fatigue resistance of the compound. Therefore, it is necessary to strictly control the ratio of tire reclaimed rubber to nylon ply layer rubber for steel wire tires. Different models of steel tire nylon cord layer have varying reclaimed rubber ratios.
High-speed passenger car steel tires can contain 10-15 parts tire reclaimed rubber to improve rolling shrinkage and reduce costs; For light truck steel wire tires and some medium-duty steel wire tires, 20-30 parts of tire reclaimed rubber can be mixed into nylon cord layer rubber, and the tensile strength of vulcanizing rubber should be maintained among 12-15MPa.
When using tire reclaimed rubber to reduce the production cost of nylon cord layer rubber for steel wire tires, rubber product manufacturers must select suitable tire reclaimed rubber, reasonably determine the reclaimed rubber dosing ratio, and appropriately adjust rubber formulas and production process parameters. In the future, we will share with you key points in the formula design, practical formulas, and production techniques for tire reclaimed rubber mixed with nylon cord layer rubber for steel wire tires.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits