Introduction
Common seals are mainly made of rubber. NR rubber seals are sealing elements made of natural rubber (NR for short). This material is a solid body formed by natural latex collected from rubber trees through a series of processing processes such as coagulation and drying. NR rubber is widely used in the field of sealing due to its excellent elasticity, mechanical strength and chemical resistance.
Four basic characteristics of NR rubber seals
1. The physical properties of rubber seals have high elastic properties at room temperature, slightly plastic, very good mechanical strength, small hysteresis loss, low heat generation during multiple deformations, so its flex resistance is also very good, and because it is a non-polar rubber, it has good electrical insulation performance.
2. Rubber, plastic, and fiber are collectively known as the three major synthetic seals. Native rubber seal materials are highly elastic and elastic polymer materials. The characteristics of the seal material are that the elastic modulus is very small and the elongation is very high.
3. It has very good air permeability and resistance to various chemical media and electrical insulation. Some special synthetic rubber seals have better oil resistance and temperature resistance: they can resist swelling of fatty oil, lubricating oil, hydraulic oil, fuel oil and solvent oil.
4. Rubber seals are also resistant to various flexures and bending deformations because the loss after the belt is small. The third characteristic of rubber amine is that it can be used, blended and compounded with a variety of materials, thereby modifying it to have good comprehensive performance.
Overview and understanding of natural rubber seals
Natural rubber seal manufacturing process
Raw material selection: Select high-quality natural rubber as raw material.
Mixing: Mix natural rubber with various additives to improve its performance.
Molding: The mixed rubber is made into the required seal shape through molding or extrusion.
Vulcanization: The vulcanization process gives the rubber seal the final physical properties.
Post-processing: Including cleaning, drying, trimming, inspection and other steps.
Application areas of natural rubber seals
Automotive industry: Used for sealing of engines, gearboxes, and fuel systems.
Chemical industry: Used for sealing of chemical pipelines, valves, pumps and other equipment.
Electronic industry: Used for packaging and protection of electronic equipment.
Medical equipment: Used for sealing that requires a sterile and non-toxic environment.
Food processing: Used for sealing in food processing machinery to ensure food safety.
How to choose NR rubber seals
Sealing medium: select suitable NR rubber seals according to the chemical properties of the medium.
Working temperature: consider the performance of the seal at a specific temperature.
Pressure and speed: select the appropriate seal type and size according to the working pressure and movement speed.
Installation conditions: consider the installation method and installation tools of the seal.
Maintenance of NR rubber seals
Regular inspection: check the wear and aging of the seal regularly.
Correct installation: install according to the manufacturer’s instructions to avoid damage to the seal.
Storage conditions: seals should be stored in a dry, cool, chemical-free environment.
Development trend of NR rubber seals
New material development: develop NR rubber with better performance, such as modified NR rubber.
Environmental protection requirements: improve the recyclability and biodegradability of NR rubber.
Intelligent manufacturing: use automation and intelligent technology to improve production efficiency and product quality.
Conclusion
NR rubber seals occupy an important position in the sealing field due to their natural, environmentally friendly and high-performance characteristics. With the development of technology and the improvement of environmental awareness, the application of NR rubber seals will be more extensive, the performance will be more excellent, and they will provide reliable solutions for various sealing needs.
