1. Material Composition
The Rubber Ball NBR90 is primarily made from Nitrile Butadiene Rubber (NBR), with a hardness rating of 90 Shore A. NBR is a copolymer of butadiene and acrylonitrile. The acrylonitrile content in NBR90 is carefully formulated, typically ranging from 35% to 45%, which endows the rubber with excellent oil resistance, fuel resistance, and good abrasion resistance. This specific blend of materials makes it highly suitable for applications where exposure to various oils, solvents, and mechanical stress is common.
2. Physical Properties
Hardness
With a Shore A hardness of 90, the NBR90 rubber ball offers a relatively high level of firmness. This hardness ensures that the ball can maintain its shape under significant pressure and is less likely to deform during normal use. It provides excellent resistance to indentation, making it suitable for applications that require a ball to withstand heavy impacts or continuous mechanical stress.
Density
The density of the Rubber Ball NBR90 falls within the range of 0.95 - 1 g/cm³. This density value contributes to its overall durability and performance. A well - balanced density ensures that the ball has sufficient mass to function effectively in applications such as industrial valves, where it needs to provide a reliable seal or act as a check mechanism. At the same time, it is not overly heavy, which could cause unnecessary strain on the equipment or impede its movement.
Color
Typically, the NBR90 rubber ball comes in a black color. The black color is a result of the carbon black filler added during the manufacturing process. Carbon black not only provides color but also enhances the mechanical properties of the rubber, such as tensile strength and tear resistance. In some cases, custom - colored balls can be produced upon request, although this may require additional processing and may slightly affect the cost.
3. Chemical Resistance
Oil and Fuel Resistance
One of the most prominent features of the Rubber Ball NBR90 is its exceptional resistance to oils and fuels. NBR90 can withstand exposure to a wide range of mineral oils, synthetic lubricants, gasoline, diesel, and many other petroleum - based products. This makes it an ideal choice for use in automotive applications, such as fuel injection systems, oil filters, and hydraulic systems. In these applications, the rubber ball must maintain its integrity and functionality even when in constant contact with various oils and fuels.
Solvent Resistance
In addition to oil and fuel, the NBR90 rubber ball also shows good resistance to many common solvents. It can resist solvents like acetone, ethyl acetate, and some alcohols. However, it should be noted that exposure to strong polar solvents or certain aromatic hydrocarbons may cause swelling or degradation over time. Therefore, it is essential to assess the specific solvent environment when considering the use of NBR90 rubber balls.
4. Applications
Industrial Valves
In industrial valve systems, the Rubber Ball NBR90 is widely used as a sealing element or a check valve component. Its high hardness and excellent chemical resistance make it suitable for applications where valves need to control the flow of liquids or gases, especially in oil refineries, petrochemical plants, and power generation facilities. The ball can effectively seal off pipelines, preventing leaks and ensuring the proper operation of the valve.
Automotive Industry
As mentioned earlier, in the automotive industry, NBR90 rubber balls are used in fuel systems to regulate the flow of fuel and in hydraulic systems to control fluid pressure. They are also used in automotive suspension systems as anti - vibration components, where their durability and resistance to environmental factors such as oil and water splashing are crucial.
Sporting Goods
In some sporting goods, such as certain types of balls used in industrial - style sports or training equipment, the NBR90 rubber ball can be used. Its high hardness and durability make it suitable for applications where the ball needs to withstand rough handling and continuous impacts. For example, in some heavy - duty training balls for strength training or in certain industrial - themed team sports.
5. Manufacturing Process
The production of Rubber Ball NBR90 involves several steps. First, the raw materials, including NBR polymer, carbon black, various additives (such as vulcanizing agents, accelerators, and antioxidants), are carefully weighed and mixed in a mixer. The mixing process ensures a homogeneous distribution of all components. Then, the mixed compound is formed into the shape of a ball through molding processes, such as injection molding or compression molding. After molding, the balls undergo a vulcanization process. Vulcanization is a crucial step that cross - links the rubber molecules, enhancing the ball's mechanical properties, chemical resistance, and durability. Finally, the balls are inspected for quality, including checks for proper hardness, diameter accuracy, and any surface defects.
6. Quality Assurance
To ensure the high quality of the Rubber Ball NBR90, strict quality control measures are implemented throughout the manufacturing process. Each batch of raw materials is tested for its chemical composition and physical properties before being used. During the manufacturing process, in - line inspections are carried out to monitor the molding and vulcanization processes. After production, the finished balls are subjected to a series of tests, including hardness testing, density testing, chemical resistance testing, and dimensional accuracy checks. Only balls that meet the predefined quality standards are approved for packaging and distribution.
7. Packaging and Storage
The Rubber Ball NBR90 is typically packaged in plastic bags or boxes to protect it from dust, moisture, and physical damage during transportation and storage. It is recommended to store the balls in a cool, dry place away from direct sunlight and sources of heat. Exposure to high temperatures, humidity, or ultraviolet light can cause the rubber to degrade over time, affecting its performance. Proper storage conditions can help maintain the quality and functionality of the rubber balls for an extended period.
8. Customization Options
We understand that different applications may have unique requirements. Therefore, we offer customization options for the Rubber Ball NBR90. This includes the ability to adjust the size of the ball according to specific needs, from small - diameter balls for precision applications to larger balls for industrial - scale use. Additionally, custom colors can be produced if the standard black color does not meet the aesthetic or functional requirements of the application. We also provide options for adding special coatings or treatments to the balls to further enhance their performance in specific environments, such as anti - static coatings for applications in electronics manufacturing.