Introduction
Rubber elasticity powers countless industrial and consumer applications—from automotive door seals to electronic device gaskets. By understanding how different rubber types stretch and recover, you can choose the right material for superior sealing performance and longer service life.
Key Rubber Types & Their Applications
| Type | Abbreviation | Typical Applications |
| Natural Rubber | NR | Automotive seals, hoses |
| General‑Purpose Rubber | GPR | Basic dampers, gaskets |
| Styrene‑Butadiene Rubber | SBR | Tires, weatherstrips |
| Nitrile Rubber | NBR | Oil seals, fuel lines |
| Silicone Rubber | SR | High‑temperature gaskets, food‑grade seals |
| Neoprene | CR | Marine fenders, oil‑resistant seals |
How Elasticity Works
- Coiled Polymer Chains
Rubber molecules form long, curly chains that tangle like a ball of yarn. - Thermal Motion
Constant molecular motion spreads the circuits, creating behavior like a spring. - Stretch & Recovery
When you pull, the chains turn; After liberation, heat waves push them back.
Factors Affecting Elasticity
- Crosslink Density – More cross connections increases rigidity, but can reduce bounce.
- Filler Type – The type of filler additives such as carbon black increase strength and wear resistance.
- Temperature Range – Extreme heat or cold changes flexibility and stability.
- Compound Formulation – Compound formula balancing rubber base, plasticizers and hardeners finely adjusts performance.
Real‑World Sealing Solutions
- Car door seals: Car door seals: epdm for excellent weather and ozone resistance with reliable rebounding.
- Home Appliance Gaskets: NBR formulas provide excellent air and water resistance.
- Industrial Flange Gaskets: Silicone rubber holds high and low temperatures for extended service life.
Why Choose OKIN Rubber?
- Premium Raw Materials: High content of rubber and pure compounds ensure consistent quality.
- Custom Extrusion: Any form, single or joint extrusion to meet your precise sealing requirements.
- Robust Quality Control: 21 production lines, including 6 joint extrusion and 3 foam lines, with 100% verification.
- Global Footprint: Proven shipments in south-east Asia, northern Europe, the Middle East and North America.