Glass fiber is made of glass balls or waste glass through high temperature melting, stretching, winding, weaving and other processes. Its fiber diameter ranges from a few microns to more than 20 microns, which is equivalent to 1/20-1/5 of a hair, and each fiber bundle is composed of hundreds or even thousands of fiber. The chemical composition is glass, which is an inorganic fiber.

     Advantages: easy for molding, low bulk density, low thermal conductivity, good heat insulation, high mechanical strength, good sound absorption, good corrosion resistance, and stable chemical properties.

     Disadvantages: In actual use, it is not suitable for direct use. Direct application will affect the use environment of glass wool and easily cause skin itching or respiratory allergies. The glass wool board used for external wall insulation is easy to deform, not resistant to extrusion and not waterproof. In addition, glass wool is not a good sound-absorbing wool, and it is ineffective as an acoustic material. It is brittle and has poor abrasion resistance. Compared with other materials, its maximum working temperature is not too high, no higher than 400°C.

     Aluminum silicate fiber, also known as ceramic fiber, is a new type of lightweight refractory material. After processing, it can be made into aluminum silicate fiber board, aluminum silicate fiber felt, aluminum silicate fiber wool, aluminum silicate fiber blanket, etc. Aluminum silicate is a kind of aluminosilicate, which is made of hard clay clinker. The clay clinker is melted through a resistance or electric arc furnace and then spun into fiber..

     Advantages: small bulk density, high temperature resistance, good thermal stability, good chemical stability, good sound absorption performance, low thermal conductivity, small heat capacity, good resistance to mechanical vibration, low thermal expansion, good heat insulation performance.

     Disadvantages: poor compression and bending resistance, easy to generate dust, poor waterproof performance.