Qualified aluminum silicate fiber needle blankets need to meet the following standards:
01 Alumina content: The alumina content in aluminum silicate fiber needle-punched blankets is an important indicator of its quality. For ordinary aluminum silicate blankets, the alumina content should not be less than 44%, while for standard or high-purity products, the alumina content should not be less than 45%. For high-aluminum aluminum silicate blankets, the alumina content should be between 52% and 55%.
02 Slag ball content: Slag ball content is an important indicator for evaluating aluminum silicate fiber needle-punched blankets. The ideal slag ball content should be less than 10%, but this depends on the specific product type and production process.
03 Appearance and size: Qualified aluminum silicate fiber needle-punched blankets should be white, uniform in texture, flat on the surface, and contain a small amount of white powder. At the same time, there should be knitting marks on both sides of the blanket. Its 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.
04 Strength: The tensile strength of the aluminum silicate fiber needle-punched blanket should reach 0.04MPa. During the test, a roll of aluminum silicate fiber needle blankets is spread out, one end is lifted up and shaken, the blanket should remain intact, and then the other end is lifted up and repeated.
05 Flammability: Use a lighter to ignite a torn aluminum silicate needle-punched blanket. Under normal circumstances, the blanket should not burn. This is an important criterion for evaluating whether the aluminum silicate fiber needle-punched blanket has fireproof properties.
06 Thermal conductivity: The thermal conductivity of the aluminum silicate fiber needle-punched blanket is also an important indicator for evaluating its quality. The ideal thermal conductivity depends on the type and purpose of the product, but generally speaking, aluminum silicate fiber needle-punched blankets with high thermal conductivity are more suitable for use as thermal insulation materials.
07 High temperature resistance: Aluminum silicate fiber needle-punched blanket should be able to maintain good structure and performance at high temperature. After high temperature treatment, the color and structure of the blanket should not change, and its strength and thermal insulation performance should also remain stable.
08 Corrosion resistance: Aluminum silicate fiber needle blankets should have good corrosion resistance and can be used for a long time in various environments. Especially in highly corrosive environments, such as chemical and papermaking industries, the high corrosion resistance of aluminum silicate fiber needle-punched blanket is particularly important.
09 Sound absorption performance: Aluminum silicate fiber needle-punched blanket has good sound absorption 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 absorption performance of aluminum silicate fiber needle-punched blanket can be effectively exerted.
10 Environmental protection performance: Aluminum silicate fiber needle blankets should have good environmental protection performance. During the production process, the impact on the environment should be minimized, and the pollution to the environment should also be minimized during use. In addition, aluminum silicate fiber needle-punched blanket should also be a low-smoke, low-toxic product to ensure the safety of users.
In general, a qualified aluminum silicate fiber needle-punched blanket must not only meet the above-mentioned physical and chemical performance indicators, but also 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.
