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In fact, the differences between NBR and EPDM rubber rollers go far beyond surface-level specifications. They differ significantly across multiple dimensions, including molecular structure, chemical stability, resistance to media, hardness retention, compression set, and service life.

Commonly used steels include 45 steel, 40Cr, 42CrMo, stainless steel, and alloy tool steel. These rolls generally possess excellent mechanical strength and machinability, allowing them to withstand the precision turning, grinding, and polishing processes required prior to plating.

The typical coating thickness range for EPDM rubber rolls is 3mm to 25mm. While most industrial applications can find a suitable thickness within this range, this does not mean a single, uniform value applies to all rolls.

Strong acids are a major source of corrosion for rubber rollers, a problem frequently encountered in industries such as electroplating, papermaking, pharmaceuticals, and chemical manufacturing. Different types of rubber exhibit significant variations in their resistance to strong acids.

The English name for nitrile rubber is "Nitrile Butadiene Rubber," and its corresponding acronym is: NBR. Consequently, when industry professionals refer to "nitrile rubber rollers," "NBR rollers," or "NBR rubber rollers," all three terms effectively designate the exact same type of rubber roller material.

However, one thing is certain: NBR ages significantly faster when exposed to outdoor sunlight compared to indoor use. In environments with intense UV radiation, surface degradation can begin to manifest within just a few weeks.

Even after prolonged contact with water, the surface of an EPDM rubber roller will not exhibit significant swelling, softening, or deformation. The reason for this lies in the fact that EPDM (Ethylene Propylene Diene Monomer) rubber possesses exceptional resistance to both water and steam.

NBR rubber rollers are unsuitable for prolonged exposure to environments with intense UV radiation. From a molecular structural standpoint, the main chain of NBR rubber contains unsaturated double bonds; this specific structural feature renders the material highly sensitive to ultraviolet light.

Among the multitude of roller manufacturers, Jinhang Machinery—based in China—stands out as a specialized manufacturer possessing advanced capabilities for large-scale, high-precision machining. Their dimensional capabilities for roller bodies are as follows: •Maximum Outer Diameter: 2,000 mm •Maximum Length: 8,000 mm •Maximum Machining Precision: 0.002 mm

Compared to materials such as natural rubber, EPDM, and silicone rubber, the most significant characteristic of NBR is that its molecular chain contains a large number of polar nitrile (–CN) groups. This structure is the fundamental reason for the exceptionally strong oil resistance of NBR rubber rollers.