Tire reclaimed rubber is made from waste tire rubber powder and produced through processes such as desulfurization, filtration, and refining. It features good elasticity, high strength, wear resistance, and ease of processing, and is highly compatible with natural rubber and styrene-butadiene rubber. Rubber cattle shed mats are generally made mainly from natural rubber and styrene-butadiene rubber, which are costly. Can tire reclaimed rubber be used? What should be noted when producing low-cost cowshed mats with tire reclaimed rubber?
1. Feasibility analysis of reducing costs by mixing tire recycled rubber into cowshed mats
Cattle shed mats require the compound to have good wear resistance, slip resistance, aging resistance, resilience, and cushioning properties. The raw material for tire reclaimed rubber mainly comes from used heavy-duty tires E6LYY115 or passenger car tires. Its main components are natural rubber, styrene-butadiene rubber, reinforcing carbon black, and a small amount of vulcanization accelerator residue. It has certain strength and hardness, meeting the basic performance requirements of bullshed mats; Better plasticity and flowability than raw rubber, easily mixed with raw rubber and additives; Therefore, bullshed mats can be mixed with recycled tire rubber to reduce costs.
2. The proportion of tire reclaimed rubber mixed into the bullpen mat
When using tire reclaimed rubber to reduce production costs for cattle shed mats, the surface layer of the pad requires high wear resistance, slip resistance, and aging resistance of the compound. The proportion of tire reclaimed rubber is generally controlled at 30%-50%; Cattle shed cushioning rubber needs to have good resilience and cushioning properties. The proportion of tire reclaimed rubber can be appropriately increased, generally controlled among 50% and 70%.
3. Key points for formula design of cowshed mats mixed with tire reclaimed rubber
After adding tire reclaimed rubber to rubber cattle pads mainly made from natural rubber and styrene-butadiene rubber, the rubber formulation needs to be appropriately adjusted.
For cowshed mats containing tire reclaimed rubber, it is recommended to use a sulfur-accelerator system, using accelerators M, DM, CZ combined with sulfur, with sulfur dosage controlled at 1.5-2.5 parts; high-wear carbon black such as N330 is used as a reinforcing agent to significantly improve the tensile strength and wear resistance of tire reclaimed rubber vulcanized rubber; semi-reinforced carbon black such as N774 improves the elasticity and flex resistance of the compound, with appropriate amounts of light calcium or clay filling; The anti-aging system uses a combination of two or more antioxidants to further enhance the aging resistance of tire reclaimed rubber bullshed mats, commonly used anti-aging agents such as A, D, 4010, and RD; Using pine tar, engine oil, and coumalong resin as reclaimed rubber softeners to improve the processing performance of the rubber compound.
4. Key Points of Tire Recycled Rubber Processing Techniques for Cattle Penn Mats
(1) Mixing: When producing rubber cowshed mats using tire reclaimed rubber together with natural rubber and styrene-butadiene rubber, tire reclaimed rubber does not need to be masticated separately. After fully masticating the natural rubber or styrene-butadiene rubber, it can be mixed together with the tire reclaimed rubber in an open mill or internal mixer. First, add small materials such as zinc oxide, stearic acid, and anti-aging agents, then mix evenly, then add carbon black and fillers, and finally add softeners and sulfur. The compound rubber should be stored for 12-24 hours before use.
(2) Calendering: The surface and bottom layers are calendered separately and then composite formed, with the calendering temperature controlled among 50-70°C.
(3) Vulcanization: Vulcanization temperature controlled at 140-160°C, vulcanization time depends on specific conditions; After vulcanization, it cools naturally to avoid rapid cooling and deformation.
Properly mixing tire reclaimed rubber into rubber cowshed mats can effectively reduce raw material costs. High-strength fine tire reclaimed rubber uses 900 waste tire whole tire powder as the main material and employs infrared desulfurization technology. It features no migration, low specific gravity, high strength, odorlessness, good tactile elasticity, and high elongation at break. When used in cowshed mat production, it can significantly improve tear resistance, aging resistance, and flexural resistance, reducing raw material costs by about one-third on average.
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