Properties of Liquid Silicone Foam Sponge
Liquid silicone foam sponge is a foamed material made from silicone rubber, possessing unique physical and chemical properties with wide-ranging applications. Below is a detailed analysis of its characteristics:
Basic Characteristics Overview
Liquid silicone foam sponge (LSR) is a liquid rubber material compared to solid high-temperature vulcanized silicone rubber, featuring the following fundamental traits:
- Excellent flowability: Its liquid state allows easier filling of complex-shaped molds during processing
- Fast vulcanization: Using platinum as a catalyst enables rapid double-liquid vulcanization
- Safe and eco-friendly: Fully meets food-grade requirements, being non-toxic and odorless
- Lightweight: Compared to solid foamed silicone sponge, it’s lighter in weight at the same volume with more uniform foaming
Physical Properties
Liquid silicone foam sponge exhibits outstanding physical performance:
| Property | Parameters/Performance | Description |
|---|---|---|
| Density | 0.16-0.20g/cm³ (after foaming) | Can be controlled at low levels through foaming treatment, with base density of 1.17g/cm³ |
| Elasticity | Shore A 10-50 | Soft touch with good compressibility and rebound elasticity |
| Temperature resistance | -50℃ to 200℃ (long-term) | Some products can withstand 400℃ short-term |
| Tear resistance | Excellent | Molecular structure contains over 5000 micron-level pores per square centimeter |
| Cushioning performance | 2-3 times better than ordinary TPU materials | Can instantly absorb 90% of impact energy |
Chemical Properties
Liquid silicone foam sponge demonstrates exceptional chemical stability:
- Chemical corrosion resistance: Essentially non-reactive except with strong alkalis and hydrofluoric acid
- Weather resistance: Resistant to water, ozone, and climate aging, difficult to be corroded by chemicals
- Flame retardancy: With additives can reach UL94-V0 grade, effectively reducing combustion risk
- Thermal stability: Maintains elasticity even in extreme temperature environments
Special Functional Properties
Liquid silicone foam sponge possesses multiple special functions making it indispensable in high-end manufacturing:
- Sealing performance
- Closed-cell structure creates effective barriers against moisture, liquids, and dust
- Recovers original shape after long-term compression, achieving watertight sealing
- Insulation performance
- High volume and surface resistivity provide excellent electrical insulation
- Prevents short circuits and leakage between electronic components
- Shock absorption
- High elasticity and energy dissipation effectively absorb and disperse mechanical vibrations and impact
- Improves drop impact resistance by 60% for sensitive components
- Thermal and acoustic insulation
- Porous structure effectively blocks sound wave conduction and heat flow transfer
- Maintains good thermal insulation performance even at 500℃
Typical Application Scenarios
Due to its exceptional properties, liquid silicone foam sponge is widely used in various fields:
| Application Field | Specific Uses | Advantageous Properties |
|---|---|---|
| New energy vehicles | Battery pack sealing, cell shock protection, thermal insulation filling | Flame retardant insulation, lightweight, high temperature resistance |
| Electronics | Phone case liners, circuit board heat dissipation, sensitive component protection | Shock absorption, thermal insulation, dust/waterproof |
| Medical devices | Breathing mask sealing layers, artificial organ materials | Biocompatibility, soft and comfortable |
| Construction | Curtain wall joint sealing, thermal bridge breaks | Weather resistance, thermal insulation |
| Household products | Baking molds, eco-friendly lunch box sealing rings | Food-grade safety, high temperature resistance |
Summary
As a high-performance material, liquid silicone foam sponge combines lightweight properties, extreme temperature resistance, excellent elasticity, superior sealing and insulation characteristics, making it an ideal choice for high-end fields including new energy, electronics, and medical applications. With advancements in material science, its performance continues to improve and applications expand.
Depu Technology (Shenzhen) Co., Ltd. (hereinafter referred to as DP Silicone or dpsilicone) is a comprehensive service provider of organic silicone with a rich history of 15 years. We specialize in the production and distribution of various silicone products. For example, liquid silicone foam products and silicone rubber coil sheets. Our product thickness ranges from 0.1mm to 15mm, with a width of up to 4 meters. Every year, we provide over 500000 square meters of silicone materials/rolls/sheets to over 2000 satisfied customers worldwide.
