Basic properties and application areas of chloroprene rubber

Introduction

Chloroprene Rubber (CR) is a synthetic rubber that has attracted much attention due to its excellent performance and wide application. Chloroprene has good weather resistance, oil resistance, chemical resistance and ozone resistance, and is widely used in many industrial fields. This article will introduce the basic characteristics, performance advantages and main application areas of chloroprene in detail to help users better understand and utilize this material.

1. Basic characteristics of chloroprene rubber

1.1 Chemical structure

Chloroprene rubber is a high molecular polymer formed by the polymerization of chloroprene (2-chloro-1,3-butadiene). Its molecular structure contains a chlorine atom, which gives chloroprene rubber unique chemical properties.

1.2 Physical properties

Appearance: Chloroprene rubber is usually milky white or light yellow and has good flexibility.

Density: The density of chloroprene rubber is about 1.23~1.25 g/cm³.

Hardness: The hardness range is wide, usually between 40~90 Shore A, and can be adjusted according to application requirements.

1.3 Thermal properties

Glass transition temperature: The glass transition temperature of chloroprene is about -45°C, and it has good low temperature performance.

Thermal stability: Chloroprene can still maintain good stability at high temperatures and can be used for a long time in the temperature range of -30°C to 120°C.

1.4 Mechanical properties

Tensile strength: The tensile strength of chloroprene is usually between 10~25 MPa.

Elongation at break: The elongation at break is relatively high, usually between 600%~800%.

Wear resistance: Chloroprene has good wear resistance and is suitable for high wear environments.

2. Performance advantages of chloroprene rubber

2.1 Weather resistance

Chloroprene rubber has excellent weather resistance and can resist the effects of ultraviolet rays, ozone and climate change. It can still maintain good performance in long-term exposure to outdoor environments.

2.2 Oil resistance

Chloroprene rubber has good tolerance to various petroleum-based fuels, lubricating oils and hydraulic oils, and is suitable for environments exposed to oil substances.

2.3 Chemical resistance

Chloroprene rubber can resist the erosion of a variety of chemicals, including acids, alkalis, solvents and chemicals, and has good chemical resistance.

2.4 Ozone resistance

Chloroprene rubber has excellent ozone resistance and can be used for a long time in an ozone environment without cracking or aging.

2.5 Flame retardancy

Chloroprene rubber has a certain flame retardancy and can maintain good stability and safety in a fire, and is suitable for occasions that require flame retardancy.

2.6 Self-adhesion

Chloroprene rubber has good self-adhesion and can be well bonded to other materials, and is suitable for applications that require bonding.

3. Application areas

3.1 Automotive industry

Seals: Neoprene is widely used in automotive seals, such as engine seals, door seals, window seals, etc., with good oil resistance and weather resistance.

Hose and hose: Hoses and hoses made of neoprene are used to transport fuel, lubricating oil and hydraulic oil, and have excellent oil resistance and chemical resistance.

Buffer pads: Buffer pads made of chloroprene rubber are used in vehicle suspension systems and shock absorbers, and have good wear resistance and elasticity.

3.2 Industrial field

Conveyor belts: Conveyor belts made of chloroprene rubber are used in mining, ports, chemical and other industries, and have good wear resistance and chemical resistance.

Rubber rollers: Rubber rollers made of chloroprene rubber are used in papermaking, printing, textile and other industries, and have good wear resistance and oil resistance.

Sealing gaskets: Sealing gaskets made of chloroprene rubber are used for sealing of various equipment, and have good chemical resistance and weather resistance.

3.3 Construction industry

Waterproof materials: Waterproof rolls and sealants made of chloroprene rubber are used in building waterproof projects, and have good weather resistance and chemical resistance.

Pipeline sealing: Pipeline seals made of chloroprene rubber are used in building water supply and drainage systems, and have good durability and chemical resistance.

Sound insulation materials: Sound insulation materials made of chloroprene rubber are used in building sound insulation projects, and have good sound absorption and durability.

3.4 Electronics and electrical

Wires and cables: Wires and cables made of chloroprene rubber are used in electronic and electrical equipment, and have good flame retardancy and heat resistance.

Insulation materials: Insulation materials made of chloroprene rubber are used in motors, transformers and other equipment, with good insulation properties and chemical resistance.

Electronic seals: Electronic seals made of chloroprene rubber are used for sealing electronic equipment and components, with good weather resistance and chemical resistance.

3.5 Other applications

Aerospace: Chloroprene rubber is used for seals, shock absorbers and shockproof materials in the aerospace field, with good weather resistance and chemical resistance.

Food industry: Food-grade seals and gaskets made of chloroprene rubber are used in food processing equipment, with good chemical resistance and oil resistance.

Medical equipment: Medical equipment seals and gaskets made of chloroprene rubber have good chemical resistance and weather resistance.

4. Selection recommendations

4.1 Applicable environment

Oil resistance: In environments exposed to petroleum-based fuels, lubricating oils and hydraulic oils, chloroprene rubber should be selected.

Chemical resistance: In environments exposed to acids, alkalis, solvents and chemicals, chloroprene rubber should be selected.

Weather resistance: In environments exposed to outdoor exposure and climate change, chloroprene rubber should be selected.

Flame retardancy: In environments where flame retardancy is required, chloroprene rubber should be selected.

4.2 Installation and maintenance

Installation: The installation of chloroprene rubber seals should be carried out in accordance with the instructions provided by the manufacturer to ensure the sealing effect.

Maintenance: Regularly check and replace chloroprene rubber seals to extend the service life of the equipment.

4.3 Economy

Cost and performance: Although the cost of chloroprene rubber is relatively high, its excellent performance and long life make it highly economical in long-term use.

Conclusion

As a high-performance synthetic rubber, chloroprene rubber has excellent weather resistance, oil resistance, chemical resistance, ozone resistance and flame retardancy. It is widely used in the automotive industry, industrial fields, construction industry, electronics and electrical, and many other fields. When choosing chloroprene rubber, its performance and cost should be comprehensively considered according to the specific application requirements and environmental conditions to achieve the best use effect. It is hoped that the detailed introduction in this article can help users better understand and utilize chloroprene rubber.

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