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 pushes chains apart, creating spring‑like behavior. - Stretch & Recovery
When you pull, chains uncoil; once released, thermal motion recoils them back.
Factors Affecting Elasticity
- Crosslink Density – More crosslinks increase stiffness but can reduce rebound.
- Filler Type – Additives like carbon black boost strength and wear resistance.
- Temperature Range – Extreme heat or cold changes flexibility and resilience.
- Compound Formulation – Balancing rubber base, plasticizers, and curatives fine‑tunes performance.
Real‑World Sealing Solutions
- Automotive Door Seals: EPDM for excellent weather and ozone resistance with reliable rebound.
- Home Appliance Gaskets: NBR formulas deliver superior air‑ and water‑tightness.
- Industrial Flange Gaskets: Silicone rubber endures high and low temperatures for extended service life.
Why Choose OKIN Rubber?
- Premium Raw Materials: High rubber content and pure formulations ensure consistent quality.
- Custom Extrusion: Any shape, single or co‑extrusion, to match your exact sealing requirements.
- Robust Quality Control: 21 production lines—including 6 co‑extrusion and 3 foam lines—with 100% inspection.
- Global Footprint: Proven supply in Southeast Asia, Northern Europe, Middle East, and North America.