Buna N rubber sheets, also known as nitrile rubber sheets, play a crucial role in various industrial applications due to their excellent resistance to oils, fuels, and chemicals. As industries in China continue to expand, understanding the properties and uses of Buna N rubber becomes increasingly important for manufacturers and engineers alike.
In this comprehensive guide, readers will explore the unique characteristics of Buna N rubber, its manufacturing processes, and its diverse applications across different sectors. From automotive to food processing, the versatility of this material is significant.
Additionally, the guide will delve into the market trends and innovations within the Buna N rubber industry in China. Readers can expect insights into sourcing, quality standards, and the latest advancements that are shaping the future of this essential material.
Comprehensive Guide to Buna N Rubber Sheets
Buna N rubber sheets, also known as Nitrile rubber or NBR, are synthetic rubber copolymers made from acrylonitrile and butadiene. They are widely recognized for their excellent resistance to oils, fuels, and various chemicals, making them ideal for numerous industrial applications. This guide will delve into the technical features, types, and applications of Buna N rubber sheets, providing a thorough understanding of their properties and uses.
Technical Features of Buna N Rubber Sheets
Buna N rubber sheets possess several key technical features that make them suitable for various applications. Below is a comparison table highlighting these features:
| Feature | Description |
|---|---|
| Hardness (Shore A) | Typically ranges from 40 to 90 Shore A, with common specifications around 60±5. |
| Tensile Strength | Generally ranges from 10 to 20 MPa, with typical values around 12 to 14 MPa. |
| Elongation at Break | Usually between 200% to 500%, commonly around 300% to 400%. |
| Temperature Range | Standard Buna-N operates between -30°C to 100°C; special grades can extend to -40°C to 120°C. |
| Compression Set | Typically around 15% to 25% after 22 hours at 70°C. |
| Oil and Fuel Resistance | Excellent resistance to oils, fuels, and petroleum-based fluids. |
| Chemical Resistance | Good resistance to many chemicals, but poor against strong oxidizing agents. |
| Aging and Weather Resistance | Moderate resistance; not ideal for prolonged exposure to ozone and sunlight. |
| Color | Typically black, but can be formulated in other colors for specific applications. |
| Thickness and Dimensions | Available in various thicknesses, typically from 1 mm to 50 mm. |
Types of Buna N Rubber Sheets
Buna N rubber sheets come in various types, each designed for specific applications and environments. The following table compares different types of Buna N rubber sheets:
| Type | Description |
|---|---|
| Standard Buna N | General-purpose rubber with good oil and fuel resistance; suitable for various applications. |
| Food-Grade Buna N | Complies with FDA regulations; used in food processing and handling applications. |
| High-Acrylonitrile Buna N | Contains higher acrylonitrile content for improved oil resistance; ideal for automotive applications. |
| Low-Acrylonitrile Buna N | Offers better flexibility at lower temperatures; suitable for applications requiring low-temperature performance. |
| Reinforced Buna N | Enhanced durability and strength; used in high-stress applications. |
| Custom Formulated Buna N | Tailored formulations for specific chemical resistance and performance requirements. |
Applications of Buna N Rubber Sheets
Buna N rubber sheets are utilized across various industries due to their versatile properties. Here are some common applications:
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Automotive Industry: Used for fuel and oil handling hoses, gaskets, and seals due to their excellent resistance to petroleum-based oils and fuels.
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Industrial Applications: Employed for making O-rings, hydraulic hoses, and seals, essential in applications requiring resistance to oils and solvents.
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Aerospace: Utilized for fuel system seals, gaskets, and hoses, capable of withstanding harsh conditions and aviation fuels.
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Oil and Gas Industry: Used for making blowout preventers, seals, and gaskets, offering resistance to crude oil and various chemicals.
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Food Industry: Food-grade Buna N rubber sheets are used for gaskets and seals in food processing equipment, ensuring safety and hygiene.
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Consumer Goods: Found in various products such as footwear, adhesives, and molded rubber goods, owing to their durability and resistance to wear.
Key Benefits of Buna N Rubber Sheets
Buna N rubber sheets offer several advantages, including:
– Oil and Chemical Resistance: Excellent resistance to oils, fuels, and certain chemicals, making them ideal for automotive and industrial applications.
– Durability: Good abrasion and tear resistance ensure longevity in demanding environments.
– Temperature Tolerance: Can withstand a wide range of temperatures, typically from -40°C to 120°C.
– Versatility: Suitable for various products, including seals, gaskets, hoses, and O-rings.
– Cost-Effectiveness: Relatively inexpensive compared to some specialty rubbers, providing a cost-effective solution.
Limitations of Buna N Rubber Sheets
Despite their advantages, Buna N rubber sheets have some limitations:
– Ozone and UV Resistance: Susceptible to degradation when exposed to ozone and sunlight, making them less suitable for outdoor applications without protective additives.
– Limited Chemical Resistance: While resistant to oils and fuels, they do not perform well against strong acids and certain other chemicals.
– Flexibility at Low Temperatures: Flexibility can diminish significantly at very low temperatures, potentially leading to brittleness.
– Environmental Concerns: Not biodegradable, posing disposal challenges.
Conclusion
Buna N rubber sheets are a versatile and durable material widely used across various industries. Their excellent resistance to oils, fuels, and chemicals, combined with their temperature tolerance, makes them suitable for numerous applications. However, it is essential to consider their limitations, particularly regarding ozone and UV resistance, when selecting them for specific projects. For high-quality Buna N rubber sheets, consider suppliers like plas-fab.com, chinarubbersheet.com, www.sbrrubbersheet.com, www.rubber-tools.com, and www.fobrubber.store.
FAQs
1. What is Buna N rubber?
Buna N rubber, also known as Nitrile rubber or NBR, is a synthetic rubber copolymer made from acrylonitrile and butadiene, known for its excellent resistance to oils and fuels.
2. What are the common applications of Buna N rubber sheets?
Buna N rubber sheets are commonly used in the automotive, industrial, aerospace, oil and gas, food, and consumer goods industries for various applications such as seals, gaskets, and hoses.
3. How do I choose the right Buna N rubber sheet for my project?
Consider factors such as application requirements, thickness, size, environmental conditions, and compliance with industry standards when selecting a Buna N rubber sheet.
4. Are Buna N rubber sheets biodegradable?
No, Buna N rubber sheets are not biodegradable and pose environmental disposal challenges.
5. What are the limitations of Buna N rubber sheets?
Limitations include poor ozone and UV resistance, limited chemical resistance against strong acids, and reduced flexibility at low temperatures.