Application of Flame Retardant Polyurethane Wheels for Belt Conveyor Rollers in Coal Mines

In the coal mine transportation system, the belt conveyor roller polyurethane wheel is a key component, which undertakes the important task of transmitting power and supporting the conveyor belt. In order to improve the wear resistance, flame retardancy and service life of the roller, the use of flame-retardant polyurethane coating has become an industry trend. This article will introduce the characteristics and performance advantages of the flame-retardant polyurethane coating suitable for coal mine belt conveyor rollers.

Overview of the characteristics of polyurethane coated wheels

The polyurethane roller polyurethane wheel for coal mines produced by Philson has the following significant characteristics:

Super toughness: tensile strength ≥ 30MPa, which is much higher than the rubber coating (≥15MPa), giving the coating a strong ability to resist belt impact, material wear and roller stress, and effectively prevent tearing and peeling.

• High elasticity guarantee: The elongation at break is ≥ 200%, combined with its excellent elastic recovery performance, ensuring that the coating can effectively buffer the impact of materials, closely fit the surface of the drum, provide stable and lasting driving friction, and reduce the risk of slipping.

• Excellent wear resistance: The wear volume is ≤ 100mm³ (better than ≤160mm³ of rubber), which significantly extends the service life of the coating in strong wear environments such as coal and gangue, and reduces maintenance frequency and cost.

• Stable hardness: The hardness range is controlled at 70~85 SHA° (Shore A type), which accurately balances the grip and wear resistance. The moderate hardness can not only provide sufficient friction coefficient to drive the belt, but also effectively absorb impact energy.

• Long-lasting heat resistance: After rigorous 70℃, 168-hour hot air aging test, the change rate of tensile strength and elongation at break are strictly controlled within the range of -25% to +25%, proving that it has stable and reliable performance and long service life in the underground temperature fluctuation environment.

• Intrinsic safety: Strictly meet the mandatory requirements for flame-retardant materials in coal mines, effectively suppress fire risks, and ensure the safety of personnel and equipment underground.

• Surface type: According to actual application requirements, flat or diamond-shaped rubber surface design can be provided. The flat type is suitable for general conveying conditions, while the diamond type has better anti-slip performance, which helps to enhance the friction between the conveyor belt and the roller and prevent slipping.

• Construction process: The cold bonding process is used to ensure that the coating layer is closely combined with the roller surface, the construction is simple and efficient, and the on-site operation is more flexible.

Performance indicators meet standards

The flame-retardant polyurethane coated wheels strictly follow the performance requirements of clause 4.2 of the **MT/T962-2019 "Rubber coating for belt conveyor rollers for coal mines"** standard, which are specifically manifested as follows:

Among them, the high tensile strength (≥30MPa) and low wear (≤100mm³) of the polyurethane coating can significantly improve the wear resistance and impact resistance of the roller surface under high load and long-term operation conditions in coal mines, extend service life, and reduce maintenance costs. At the same time, its excellent flame retardant properties also provide important guarantees for safe production in coal mines.

Application value and advantages

• Extend the service life of equipment: high strength and low wear characteristics significantly reduce roller surface wear and reduce replacement frequency.

• Improve operating efficiency: The diamond rubber surface design can effectively increase the friction coefficient between the roller and the conveyor belt and reduce the risk of slipping.

• Meet the safety needs of mines: meet flame retardant standards, reduce fire risks, and ensure safe production in coal mines.

• Adapt to various working conditions: multiple thicknesses are available, which can flexibly adapt to different conveyor models and workloads.

• Efficient construction: The cold bonding process is simple and efficient, shortening the installation cycle and reducing downtime.

As a polyurethane wheel solution provider, Philson is committed to providing high-performance polyurethane coating products for the coal mine transportation industry. Whether it is the installation of new equipment or the renovation of old rollers, Philson can provide you with reliable products and services to help coal mines operate safely and efficiently. For more technical parameters or customized solutions, please contact us!