The raw materials of fiber sealing board mainly include rubber, zinc oxide, white carbon black, dibutyl ester, stearic acid, paraffin, sulfur, defoamer, glass fiber, graphite powder, anti-aging agent and accelerator, etc. During the production process, these raw materials are mixed into rubber according to the formula for pulping, and then waste fiber is added to form rubber, and finally the sheet material is made by rolling and vulcanized, and finally formed into a finished product.
In addition, there is a formula for asbestos-free sealing fiberboard, whose raw materials include 3800-4200 parts of rubber, 480-520 parts of zinc oxide, 1800-2200 parts of white carbon black, 180-220 parts of dibutyl ester, 40-60 parts of stearic acid, 50-70 parts of paraffin, 70-90 parts of sulfur, 980-1200 parts of defoaming agent, 1480-1520 parts of glass fiber, 1140-1160 parts of graphite powder, 100-120 parts of anti-aging agent and 320-360 parts of accelerator.
