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Calcium Silicate Board Felt
Calcium Silicate Board Felt are composed of base wire layer and batt fiber layer. The base wire layer generally accounts for 30% -50% of the weight of the finished felt. For the base wire layer, the warp wire is made of nylon filament yarn, the weft wire is made of monofilament. The batt fiber layer is made by combing nylon short fibers into a mesh, and then repeatedly piercing it with a triangular needle of a needle punching machine to firmly bond the batt fiber layer and the base wire layer together. It not only protects the base wire layer but also increases the water filtration effect. Calcium Silicate Board Felt has
good dehydration, long service life, low compressibility, good dimensional stability, high strength, good flatness, etc.
The Production Procecss of Calcium Silicate Board Felt
1. Raw material preparation: Wet grinding and pulping of quartz sand, crushing and digestion of quicklime, and pulping of wood fibers according to the formula requirements.
2. Pulp making: Pump the wood fiber pulp that meets the required beating degree into the pulp making machine, and then add other raw materials to the pulp making machine in sequence. After mixing and stirring in the pulp making machine, a certain concentration of flowing pulp is formed, and then the pulp is pumped into the pulp storage tank. Start the pulp pump, refiner, slag cleaner, and previous agitator to ensure uninterrupted circulation of the pulp between the storage tank,pulp pump, slurry mill, slag cleaner, and previous agitator, ensuring that the fibers and particles in the pulp are released and improving fiber adsorption.
3. Pulp board: The pulp evenly flowing out of the headbox is filtered and dehydrated on the running industrial felt, forming a thin material layer wrapped around the forming drum. When the thickness of the board reaches the set thickness through multi-layer winding, the control system automatically cuts the board according to its design size.
4. Board Pressing: The formed slab is pressurized and held for 30 minutes by a calcium silicate plate forming hydraulic press, allowing the board to dehydrate and compact under high pressure to improve its strength.
5. Calcium silicate board demolding: Wet board felt are pre cured at a temperature of 50-70 ℃ for 4-5 hours, and demolding is carried out after obtaining a certain strength.
6. Steam curing: After demolding, the calcium silicate board is sent to a steam curing kettle at 190 ℃ for 24 hours. The calcium silicate board undergoes hydration reaction, and the quality of the hydration reaction directly affects the quality of the calcium silicate board.
7. Drying, sanding, and edging: Dry the steam cured board to a moisture content of no more than 12%, then perform surface treatment, including stainless steel polishing, edging, and packaging for storage.
Calcium Silicate Board Felt
Calcium Silicate Board Felt are composed of base wire layer and batt fiber layer. The base wire layer generally accounts for 30% -50% of the weight of the finished felt. For the base wire layer, the warp wire is made of nylon filament yarn, the weft wire is made of monofilament. The batt fiber layer is made by combing nylon short fibers into a mesh, and then repeatedly piercing it with a triangular needle of a needle punching machine to firmly bond the batt fiber layer and the base wire layer together. It not only protects the base wire layer but also increases the water filtration effect. Calcium Silicate Board Felt has
good dehydration, long service life, low compressibility, good dimensional stability, high strength, good flatness, etc.
The Production Procecss of Calcium Silicate Board Felt
1. Raw material preparation: Wet grinding and pulping of quartz sand, crushing and digestion of quicklime, and pulping of wood fibers according to the formula requirements.
2. Pulp making: Pump the wood fiber pulp that meets the required beating degree into the pulp making machine, and then add other raw materials to the pulp making machine in sequence. After mixing and stirring in the pulp making machine, a certain concentration of flowing pulp is formed, and then the pulp is pumped into the pulp storage tank. Start the pulp pump, refiner, slag cleaner, and previous agitator to ensure uninterrupted circulation of the pulp between the storage tank,pulp pump, slurry mill, slag cleaner, and previous agitator, ensuring that the fibers and particles in the pulp are released and improving fiber adsorption.
3. Pulp board: The pulp evenly flowing out of the headbox is filtered and dehydrated on the running industrial felt, forming a thin material layer wrapped around the forming drum. When the thickness of the board reaches the set thickness through multi-layer winding, the control system automatically cuts the board according to its design size.
4. Board Pressing: The formed slab is pressurized and held for 30 minutes by a calcium silicate plate forming hydraulic press, allowing the board to dehydrate and compact under high pressure to improve its strength.
5. Calcium silicate board demolding: Wet board felt are pre cured at a temperature of 50-70 ℃ for 4-5 hours, and demolding is carried out after obtaining a certain strength.
6. Steam curing: After demolding, the calcium silicate board is sent to a steam curing kettle at 190 ℃ for 24 hours. The calcium silicate board undergoes hydration reaction, and the quality of the hydration reaction directly affects the quality of the calcium silicate board.
7. Drying, sanding, and edging: Dry the steam cured board to a moisture content of no more than 12%, then perform surface treatment, including stainless steel polishing, edging, and packaging for storage.
