Industrial Nitrile Rubber Roller is a key component widely used in modern manufacturing. Nitrile rubber, or NBR (Nitrile Butadiene Rubber), is a synthetic rubber made by copolymerizing acrylonitrile and butadiene. Due to its unique chemical structure, Nitrile Rubber Roller exhibits excellent oil resistance, wear resistance and aging resistance, making it an ideal choice for many industrial applications.

Composition and characteristics of Nitrile Rubber Roller

Nitrile Rubber Roller is made of nitrile rubber composite material, usually covered on a metal or hard material roller core. Nitrile rubber contains polar groups (i.e. acrylonitrile groups) in its chemical structure, which makes it have excellent oil resistance and solvent resistance, especially in environments with contact with mineral oils, fuels, lipids and other chemicals.

The wear resistance and elasticity of Nitrile Rubber Roller enable it to maintain stable performance in high-pressure and high-speed working environments, and it is not easy to deform or damage. This makes Nitrile Rubber Roller widely used in industries involving printing, textiles, papermaking, metal processing, plastic processing, etc.

Main Applications of Nitrile Rubber Roller

Due to its versatility and excellent physical properties, industrial Nitrile Rubber Roller is widely used in many fields:

● Printing industry: used for ink transfer rollers on printing presses to ensure uniform distribution of ink.

● Textile industry: used for cloth guide rollers in textile machines to ensure that the cloth remains flat during processing.

● Papermaking industry: In papermaking machines, Nitrile Rubber Roller is used for paper conveying and coating processes to ensure smoothness and uniformity of paper.

● Metalworking industry: used for stretching and straightening rollers for metal sheets to ensure the flatness and precision of metal sheets.

How to determine whether rubber is nitrile rubber?

Determining whether rubber is nitrile rubber is crucial in industrial production, especially when ensuring that the material is suitable for a specific application. Here are some commonly used judgment methods:

Combustion test

Combustion test is a quick and effective preliminary detection method. The specific operation is as follows:

● Sampling: Cut a small amount of sample from the rubber material to be tested.

● Combustion: Ignite the sample with a flame and observe its combustion characteristics.

During the combustion process, nitrile rubber will show the following characteristics:

● Burning smell: When burning, nitrile rubber will produce a very unique and pungent smell, which usually makes workers on the scene feel uncomfortable. Because nitrile rubber contains acrylonitrile, its combustion products include harmful substances such as hydrogen cyanide, so smelling a smell similar to "bitter almonds" or "burning plastic" is a significant sign to identify nitrile rubber.

● Burning characteristics: When burning, nitrile rubber usually melts slowly, the flame is unstable, and there may be a little black smoke. If the fire source is removed, the flame may go out immediately.

Solvent test

Nitrile rubber has a certain resistance to many organic solvents, but its oil resistance is particularly outstanding. By immersing the rubber sample in a specific solvent and observing its reaction, it can be further confirmed whether it is nitrile rubber:

● Oil resistance test: Nitrile rubber has strong resistance to petroleum-based oil solvents (such as gasoline, diesel, mineral oil). If the rubber sample does not dissolve or swell obviously after being immersed in an oil solvent, it is very likely to be nitrile rubber.

● Non-polar solvents: Compared with other types of rubber, nitrile rubber exhibits stronger resistance to swelling in non-polar solvents (such as hexane and ether), which can be used to further verify the properties of the material.

Hardness test

Nitrile Rubber Roller has a wide hardness range, usually between 50 and 90 Shore hardness, depending on its application and specific formulation. By testing with a durometer, the hardness of the rubber can be quantitatively measured and compared with the hardness range of standard nitrile rubber. Although the hardness test cannot determine the type of rubber alone, it can be used as a factor in comprehensive judgment.

Infrared spectroscopy analysis

Infrared spectroscopy analysis (FTIR) is a more accurate analysis method that can accurately identify the chemical composition of rubber by detecting the chemical bonds in the rubber molecules. The characteristic peaks of Nitrile Rubber Roller include the stretching vibration of C≡N (cyano), which is manifested as an absorption peak of 2250-2230 cm⁻¹ in the infrared spectrum. By comparing the spectrum with known samples, it is possible to accurately determine whether the sample is nitrile rubber.

Thermogravimetric analysis

Thermogravimetric analysis (TGA) is a technique that heats a rubber sample and measures how its weight changes with temperature. Nitrile Rubber Roller, due to its chemical composition, usually has significant weight loss in the range of 200-300°C. This analysis method can provide information on the thermal stability and decomposition temperature of the rubber, helping to confirm whether it is nitrile rubber.

Industrial Nitrile Rubber Roller has been widely used in many industrial fields due to its excellent oil resistance, wear resistance and anti-aging properties. Its stable performance under high pressure, high speed and high temperature environment makes it an indispensable and important component in industries such as printing, textile, papermaking, and metal processing.

To determine whether the rubber is nitrile rubber, a variety of methods such as combustion test, solvent test, hardness test, infrared spectroscopy analysis and thermogravimetric analysis can be used for comprehensive judgment. The combustion test is a simple and intuitive method. By observing the burning smell and characteristics, it can be preliminarily judged whether the material is nitrile rubber. More accurate judgment methods such as infrared spectroscopy and thermogravimetric analysis can provide more scientific verification methods.

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