Definition and characteristics of HTV silicone rubber
HTV silicone rubber, also known as High Temperature Vulcanized Silicone Rubber, is a silicone-based elastomer material designed for high-performance applications. It uses high molecular weight polysiloxane as the main component, supplemented by fillers and functional additives, and forms stable rubber products through high-temperature vulcanization. The outstanding characteristics of HTV silicone rubber include high temperature stability, chemical resistance and excellent electrical insulation properties, so it is widely used in many fields such as industry, electronics, and medical treatment.
Classification of HTV silicone rubber
1. Classification according to use Ordinary silicone rubber
- suitable for conventional industrial products, such as sealing rings, gaskets, etc. Specialty silicone rubbers:
- with additional features such as electrical conductivity, fire and flame retardant properties, suitable for more demanding environments.
2. Classification according to vulcanization method Peroxide vulcanization type
- The product has excellent heat resistance by initiating a cross-linking reaction through peroxide. Platinum catalytic vulcanization:
- platinum is used as a catalyst, the reaction is mild, the product is non-toxic, and it is suitable for medical and food industries.
Production process of HTV silicone rubber
1. Preparation of raw materials
The production of HTV silicone rubber is based on high molecular weight silicone and reinforcing fillers such as silica. By adding ingredients such as plasticizers, pigments, and vulcanizing agents, the properties and appearance of rubber can be adjusted.
2. Mixing
In the open mill or internal mixer, the silica gel matrix is mixed evenly with various additives to ensure the consistency of the formulation. This step has a direct impact on the quality of the final product.
3. Molding and vulcanization
Through molding processes such as molding, extrusion or injection molding, the compounded compound is processed into the desired shape. It is then vulcanized at high temperatures (typically 160-200°C) to achieve molecular crosslinking for final performance.
Advantages of HTV silicone rubber
1. Excellent high-temperature resistance
HTV silicone rubber can operate stably in the temperature range of -60°C to 300°C, making it an ideal material for high-temperature applications.
2. Excellent electrical insulation properties
Its electrical insulation is stable under high humidity, extreme temperatures, and high voltage conditions, so it is widely used in electrical insulation equipment.
3. Strong chemical stability
HTV silicone rubber has excellent resistance to a wide range of chemicals, including acids, alkalis and oils, and is suitable for harsh chemical environments.
4. Biocompatibility The specially treated
HTV silicone rubber is non-toxic, non-irritating, and meets medical grade standards for medical devices implanted in the body.
Application areas of HTV silicone rubber
1. Industrial sector
Seals: such as O-rings and gaskets for pipe connections and mechanical seals. Vibration damping components: such as cushions, shock absorbers in suspension systems.
2. Electronics and Electrical
Cable jacketing: Provides excellent insulation and environmental resistance. Electronic component encapsulation: Protects sensitive components from moisture and dust.
3. Medical and food
Medical-grade products: such as catheters, prostheses, surgical tools.
Food Grade Silicone Mold: Safe, non-toxic and reusable.
4. Automotive industry
Ignition coil sheath: Protects against high temperatures and chemical corrosion.
Seals and gaskets: Oil resistance and high-temperature stability make them an ideal choice