Glass fiber needle-punched felt is a structurally sound and high-performance filtration and thermal insulation material. It is made from glass fiber as the raw material, where needles are used to puncture a combed short-cut glass fiber mat.
Through a mechanical process, the fibers within the felt layer and between the felt layer and the reinforcing glass fiber base cloth become entangled, reinforcing the fiber web to form a felt-like non-woven filtration material.
Glass fiber needle-punched felt not only retains the advantages of glass fiber fabrics, such as high-temperature resistance, corrosion resistance, dimensional stability, minimal elongation and shrinkage, and high strength, but also features a felt layer composed of individual fibers with a three-dimensional microporous structure.
This results in high porosity and low resistance to gas filtration, making it a relatively high-speed and high-efficiency high-temperature filtration material. Compared to other high-temperature-resistant synthetic fiber felts, it offers the special advantages of lower cost and higher temperature resistance, though its operational resistance is higher than that of general synthetic high-temperature filter materials.
Advantages:
- Excellent Thermal Insulation: Based on physical principles, gases have low thermal conductivity, and superior insulating materials contain numerous air pockets. Glass fiber needle-punched felt possesses countless tiny air pockets, with fibers arranged irregularly, making it an excellent insulating material with a thermal conductivity coefficient of 0.035 W/(m·K).
- Non-Combustible: The main component of glass fiber is silicate compounds (over 50%), giving it non-combustibility, no deformation, and no embrittlement up to 700°C.
- Good Sound Absorption: When sound waves penetrate glass fiber wool, their energy is significantly reduced due to collisions with voids of varying sizes within the fibers.
- High Insulation Properties: Glass fiber can withstand high temperatures, possesses good mechanical properties, and high chemical stability, making it an optimal insulating material.
- High Corrosion Resistance: Glass fiber is resistant to strong acids and alkalis, with no reduction in its functional characteristics over extended periods.
- Excellent Resilience: Glass fiber contains numerous fixed air pockets, providing exceptional resilience. It withstands any impact or vibration, with a tensile strength of over 1.0 kg.
- Low Moisture Absorption: The moisture absorption rate is typically close to zero.
- Lightweight and Soft: Compared to other insulating materials, glass fiber needle-punched felt is the lightest and most flexible. When installed on machinery, it can reduce weight and vibration load.
- Easy Installation: Dimensions can be custom-cut according to client requirements.