The reason why aluminum silicate fiber needle blankets can be fire-proof and heat-insulating is actually mainly attributed to the aluminum silicate refractory fibers. Aluminum silicate refractory material itself is a type A non-combustible material with good air sealing performance and special material with insulation performance. It can effectively isolate the penetration of external heat sources and can well lock the diffusion of internal temperature. What standards must an aluminum silicate fiber needle-punched blanket meet to achieve this effect?
Qualified aluminum silicate fiber needle blankets need to meet the following standards:
1. Alumina content: The alumina content in aluminum silicate fiber blanket is an important indicator to measure its quality. For ordinary aluminum silicate blankets, the alumina content should be no less than 44%, and for standard or high-purity products, the alumina content should be no less than 45%. For high-aluminum aluminum silicate blankets, the alumina content should be between 52% and 55%.
2. Slag ball content: Slag ball content is an important indicator for evaluating aluminum silicate fiber blankets. The ideal ball content should be less than 10%, but this depends on the specific product type and production process.
3. Appearance and size: A qualified aluminum silicate fiber needle blankets should be clean white, uniform in texture, flat on the surface, and contain a small amount of white powder. Also, both sides of the blanket should have traces of knitting. The length should not be less than the design size, the allowable deviation of the width is -6.1~+14.9mm, and the allowable deviation of the thickness is -4.1~+7.9mm.
4. Strength: The tensile strength of aluminum silicate fiber needle-punched blanket should reach 0.04MPa. During the test, spread out a roll of aluminum silicate needle punched blanket, lift up one end and shake it out. The blanket should remain intact, then lift up the other end and repeat the last action.
5. Flammability: Use a lighter to ignite a torn aluminum silicate blanket. Under normal circumstances, the blanket should not burn. This is an important criterion for evaluating whether aluminum silicate fiber needle-punched blankets have fire-retardant properties.
6. Thermal conductivity: The thermal conductivity of aluminum silicate fiber needle blankets is also an important indicator to evaluate its quality. The ideal thermal conductivity depends on the type and use of the product, but generally speaking, high thermal conductivity aluminum silicate fiber needle punched blankets are more suitable for use as insulation materials.
7. High temperature resistance: Aluminum silicate fiber needle punched blanket should be able to maintain good structure and performance at high temperatures. After high-temperature treatment, the color and structure of the blanket should not change, while its strength and insulation properties should remain stable.
8. Corrosion resistance: Aluminum silicate fiber needle blanket should have good corrosion resistance and can be used for a long time in various environments. Especially in highly corrosive environments, such as chemical industry, papermaking and other industries, the high corrosion resistance of aluminum silicate fiber needle-punched blankets is particularly important.
9. Sound-absorbing performance: Aluminum silicate fiber blanket has good sound-absorbing performance and can effectively absorb noise and reduce noise levels. Especially in places where noise needs to be reduced, such as factories, machine rooms, etc., the sound-absorbing performance of aluminum silicate fiber needle-punched blankets can be effectively utilized.
10. Environmental protection performance: Aluminum silicate fiber needle blankets should have good environmental performance. During the production process, the impact on the environment should be minimized, and at the same time, the environmental pollution should be minimized during use. In addition, aluminum silicate fiber needle-punched blankets should be low-smoke and low-toxic products to ensure the safety of users.
In general, qualified aluminum silicate fiber needle-punched blankets not only need to meet the above physical and chemical performance indicators, but also need to meet environmental protection and safety requirements during production and use. When purchasing and using aluminum silicate fiber needle-punched blankets, it is recommended to choose products with relevant certifications to ensure that their quality and performance meet the requirements.
