Fluorine elastomers (FKM) are renowned for their exceptional resistance to high temperatures, aggressive chemicals, and harsh environments. Symb ChemTech’s peroxide-vulcanized fluorine rubber takes these properties a step further, offering enhanced processing characteristics and improved performance in critical applications. This article explores the key features, benefits, and applications of this advanced material.
Advantages of Peroxide Vulcanization:
Traditional FKM vulcanization often involves bisphenol curing systems, which can require long cure times and post-cure treatment. Peroxide vulcanization offers several distinct advantages:
- Outstanding Fluidity and Release: Improved flow properties during processing, leading to better mold filling and easier demolding.
- Excellent Tear Resistance: Enhanced resistance to tearing and abrasion, ensuring long-term durability in demanding applications.
- Fast Curing: Shorter cure times compared to bisphenol systems, increasing production efficiency.
- Reduced or Eliminated Post-Cure: In many cases, post-cure treatment is not required or can be significantly shortened, further streamlining production.
- Good Processing Properties: Easier to process and handle, improving manufacturing efficiency.
- Excellent Medium Resistance: Maintains the inherent chemical resistance of FKM elastomers.
- Excellent Compression Set: Reduced permanent deformation under compression, ensuring long-term sealing performance.
Key Features and Benefits:
Symb ChemTech’s peroxide-vulcanized fluorine rubber offers a compelling combination of properties:
- High Fluorine Content: Provides exceptional resistance to a wide range of chemicals, fuels, and oils.
- Wide Hardness Range: Available in various hardness grades to suit specific application requirements.
- Excellent High-Temperature Performance: Maintains its properties at elevated temperatures.
- Long-Term Durability: Withstands harsh operating conditions and provides reliable sealing performance over extended periods.
Available Grades:
Symb ChemTech offers several grades of peroxide-vulcanized fluorine rubber to meet diverse application needs:
- JHF530 & JHF533: High fluorine content (70%) for maximum chemical resistance.
- JHP530 & JHP533: Medium fluorine content (68.5%) offering a balance of properties and cost-effectiveness.
- JHL530 & JHL533: Lower fluorine content (65%) suitable for less demanding applications.
Technical Specifications (Summary):
| Property | JHF530/533 | JHP530/533 | JHL530/533 |
|---|---|---|---|
| Fluorine Content (%) | 70 | 68.5 | 65 |
| Specific Gravity (g/cm³) | 1.87-1.90 | 1.83-1.86 | 1.77-1.82 |
| Mooney Viscosity ML(1+10)121°C | 10-100 | 10-100 | 10-100 |
| Tensile Strength, MPa | ≥20 | ≥20 | ≥20 |
| Elongation at Break, % | ≥240 | ≥240 | ≥240 |
| Compression Set (200°C x 70H, Compressibility 25%), % | ≤35 | ≤35 | ≤35 |
| Hardness (Shore A) | 65-85 | 65-85 | 65-85 |
(Please refer to the full product datasheet for complete technical details.)
Applications:
Peroxide-vulcanized fluorine rubber is widely used in various industries:
- Automotive: Fuel systems, fuel storage and delivery systems, diaphragms, gaskets, refueling pipes, static seals, and oil seals.
- Chemical Processing: Seals and gaskets for pumps, valves, and pipelines handling corrosive chemicals.
- Oil and Gas: Downhole tools, seals, and gaskets for demanding exploration and production environments.
- Aerospace: Seals and gaskets for aircraft engines and fuel systems.
- Semiconductor: Seals and gaskets for semiconductor manufacturing equipment.
- Wearable Electronics: Dry seals for intelligent wearable products.
Handling and Safety Precautions:
Like all FKMs, peroxide-vulcanized fluorine rubber can decompose at high temperatures (above 300°C), releasing toxic hydrogen fluoride (HF) and fluorocarbon compounds. Avoid contact with open flames and incompatible materials such as metal powders (aluminum, magnesium) and high concentrations of amine compounds. Always consult the safety data sheet (SDS) for detailed handling and safety information.
Packaging and Storage:
The product is typically packaged in polyethylene film bags (5kg each) within hard cartons (25kg net content). Store in a clean, cool, and dry place away from moisture, dust, and direct sunlight.
Conclusion:
Symb ChemTech’s peroxide-vulcanized fluorine rubber offers a significant advancement in FKM technology, providing enhanced processing characteristics and improved performance in demanding sealing applications. Its superior fluidity, tear resistance, and fast curing properties make it an ideal choice for a wide range of industries.