LSR Vertical Single-Slide Liquid Silicone Rubber Injection Molding Machine
What Is Silicone Rubber?
Silicone rubber is a high-performance synthetic elastomer composed of silicone and other molecules (e.g., carbon, hydrogen, and oxygen). It is characterized by high viscosity and elasticity, as well as superior abrasion resistance, chemical stability, insulating properties, heat and cold temperature resistance, and weatherability compared to organic rubber.
Key Properties of Silicone Rubber
- Operating temperature range: -100°C to 350°C (depending on exposure duration)
- Excellent weatherability: resistant to wind, rain, UV radiation, and ozone
- Moisture resistance: only 1% water absorption in cold, warm, and boiling water
- Steam resistance: indefinite resistance to unpressurized steam
- Chemical resistance: withstands oils, solvents, polar organic compounds, and diluted acids/alkalis
- Electrical insulation: 1TΩ*m-100TΩ*m across wide temperature and frequency ranges
- Thermal conductivity: 0.2 W/mΩ*K
- Compression set: consistent performance from -60°C to 250°C
- Tear strength: 9.8 kN/m
Types of Silicone Rubber
Silicone rubber formulations vary based on molecular structure and form, categorized primarily by viscosity and processing method:
- Solid Silicone Rubber (HTV): Long polymer chains with high molecular weight, processable by conventional rubber methods
- Liquid Silicone Rubber (LSR): Short polymer chains with lower molecular weight, requiring specialized injection molding
- Room Temperature Vulcanized (RTV) Rubber: One- or two-component system used for sealing, encapsulation, and potting
Industrial Applications
Silicone rubber's exceptional properties make it indispensable across multiple industries:
- Aerospace components (e.g., space suit elements)
- Automotive gaskets and seals
- Construction coatings and sealants
- Electrical/electronic adhesives and encapsulants
- Food processing molds
- Medical instrument components (seals, tubes, valves)
- Recreational equipment (goggles, mouthpieces)
Liquid vs. Solid Silicone Rubber
Key differences between LSR and solid silicone rubber:
- LSR: High fluidity, transparent/odorless products, food/skin contact safe, requires specialized equipment
- Solid Silicone: Lower fluidity, cost-effective processing with conventional equipment
Silicone rubber's durability, flexibility, and environmental resistance make it essential for applications ranging from automotive components to medical devices and advanced communication systems.
