Asbestos and non-asbestos sealing materials, asbestos sealing materials are more resistant to high temperature than non-asbestos sealing materials. The main components of asbestos sealing materials are asbestos, filler and rubber, during which the temperature resistance of asbestos and filler is very high; Most asbestos-free sealing materials are mainly composed of mineral fiber, organic fiber, filler and rubber. During this period, the temperature resistance of organic fiber is usually at 200 ℃, and the current temperature resistance of asbestos gasket has reached 1000 ℃.
2. The mechanical strength of asbestos sealing materials is higher than that of non-asbestos sealing materials.
(1) The surface of asbestos fiber is attached with multivalent metal cations. It is easy to form a strong interface connection with rubber with negative charge on the surface, which improves the connection strength of rubber fiber, that is, the mechanical strength of asbestos sealing materials. However, the direct affinity between the currently selected non-asbestos mineral fibers and the rubber matrix is not as good as asbestos, so the contact strength of the rubber fiber is also not as good as asbestos.
(2) Asbestos fiber can be infinitely subdivided, and its specific surface area is larger than that of non-asbestos mineral fiber, so the reinforcement effect is significant.
(3) The tensile strength of asbestos fiber is higher than that of non-asbestos fiber, so the reinforcement effect of asbestos fiber is significant.
3. Asbestos-free sealing data has better fineness than asbestos sealing data. Due to the high content and different particle sizes of fillers in the asbestos-free sealing materials, the microvoids of the rubber fiber can be fully filled. For example, Bode Seal uses a high-precision material selection screen, and fine selection of multiple raw materials makes the data more uniform. In addition, asbestos-free fiber does not have a tubular structure like asbestos fiber, but a solid structure, so it has good fineness and compactness.
4. As is known to all, the seriousness of the harm of asbestos data to human health has been stopped in developed countries such as Europe, America and Japan, and China will gradually screen asbestos sealing data and replace it with non-asbestos sealing data.
5. Asbestos-free sealing data are classified as environmentally friendly, while asbestos sealing data are classified as non-environmentally friendly. Asbestos fibers contained in asbestos sealing materials are prone to silicosis in humans, while asbestos-free sealing materials do not contain asbestos fibers. It is worth noting that there are few asbestos-free data manufacturers in China, such as Shangcaibaide, which do not contain asbestos. They must be carefully identified when purchasing.