1. Introduction
VMQ/SILICONE and FVMQ are two important elastomeric materials that are widely used in various industrial fields, especially in environments requiring high-temperature resistance and chemical corrosion resistance. Although these two materials may seem similar, their performance differences can significantly impact the functionality of a product. For example, in the automotive industry, seals are critical components that must operate reliably under high temperatures while resisting oils and chemicals present in the engine. In such cases, the choice between VMQ/SILICONE and FVMQ becomes crucial. In the following, we will explore the differences between these two materials and their applications in different scenarios.
2. What is VMQ/SILICONE?
1. Composition and Structure:
VMQ, also known as Silicone Rubber, is an elastomer composed of a polysiloxane (Polysiloxane) backbone. Its basic chemical structure consists of alternating silicon (Si) and oxygen (O) atoms in the backbone, with organic side groups like methyl and vinyl attached to the silicon atoms. This structure gives silicone rubber excellent thermal stability and chemical inertness, allowing it to maintain elasticity at extreme temperatures.
2. Key Features:
VMQ silicone rubber is renowned for its outstanding high and low-temperature resistance, remaining stable across a temperature range of -60°C to 225°C, with special formulations that can be used between -100°C and 300°C. Additionally, silicone rubber has excellent electrical insulation properties and stability against heat oxidation and ozone. It is non-toxic and environmentally friendly, suitable for applications requiring high safety and hygiene standards. However, silicone rubber has relatively low mechanical strength, poor oil, solvent, and acid-alkali resistance, and a more complex vulcanization process.
3. Applications:
Due to its unique properties, VMQ silicone rubber is widely used in high and low-temperature applications, such as manufacturing hoses, seals, and insulation layers for high-temperature cables. Its non-toxic and odorless characteristics make it widely used in the food and medical industries, such as food-grade seals, baby products, and medical devices. In summary, silicone rubber is an ideal choice for any application requiring a combination of thermal stability, flexibility, and safety.
3. What is FVMQ?
1. Composition and Structure:
FVMQ is a special elastomer with a silicon-oxygen bond (Si-O) backbone and trifluoropropyl groups in the side chain. FVMQ is polymerized similarly to dimethyl silicone rubber, using a cyclic siloxane ring-opening polymerization process. This structure gives fluorosilicone rubber the temperature resistance of silicone rubber and the oil and solvent resistance of fluororubber, providing unique advantages under extreme conditions.
2. Key Features:
FVMQ has excellent oil and solvent resistance, particularly maintaining stability under normal and high temperatures against petroleum-based fuels, lubricants, hydraulic oils, and certain synthetic oils. Its operating temperature range is -60°C to 200°C, with long-term use possible within this range, and up to 180°C under oil immersion conditions. Although its heat resistance and drug resistance are slightly inferior to ordinary fluororubber, its unique silicon-oxygen bond and fluorine side chain structure make it perform well in fuel oil environments. Disadvantages include relatively low mechanical strength, general resistance to ethanol gasoline, and higher costs.
3. Applications:
FVMQ is widely used in the aerospace and automotive industries. In aerospace, it is used in harsh environments requiring low temperature, oil resistance, and acid resistance, such as fuel oil seals on aircraft, integral tank seals, and sensor materials. In the automotive industry, FVMQ is commonly used in vehicle seals, oil seals, diaphragms, ducts, valves, and other components, particularly in special vehicle door and window seals and sensor materials. Due to its superior performance, FVMQ is particularly suitable for applications that require stability under extreme conditions.
4. Conclusion
Jingteng Seiko—a leader in the fluid control industry—offers tailored solutions for automotive, medical, food, and other sectors. We uphold the highest standards in material selection and precision craftsmanship, ensuring every product undergoes rigorous testing before delivery. With a commitment to 100% reliability, Jingteng Precision ensures your equipment operates efficiently and effectively.
Email: [email protected]
WA Business: +86 18450068757
Web: https://www.rubbervalve.com/
Facebook: https://www.facebook.com/rubbervalve/
Facebook: https://www.facebook.com/JT.RubVal/
Linkedin: https://www.linkedin.com/in/rubbervalve/
Youtube: https://www.youtube.com/@rubbervalve120
Twitter: https://twitter.com/rubber_valve
