Acrylic fibers used in the filtration industry generally refer to homopolymer acrylic. Acrylic fiber was invented by DuPont in 1950. It has a round or figure-eight appearance, smooth surface, not easy to absorb water, resistant to acid, alkali and sunlight, and also not easy to yellow and easy to dye. It is usually called polyacrylonitrile fiber. The strength of the acrylic fiber itself is not very superior, and the polyester filament base fabric or the acrylic and polyester mixed base fabric is generally used to enhance the strength of the needle felt.
Acrylic needle punched felt is a fine fiber cloth with staggered arrangement of acrylic reinforcing fibers and uniform void distribution by non-woven technology. The surface is treated by hot rolling, singeing, etc. The temperature resistance of the dust filter bag is 140~160 degrees Celsius. It is the best medium temperature filter material dust filter bag with the best acid resistance, alkali resistance and hydrolysis resistance.
Imported acrylic fiber is used as raw material to make felt by needle punching method, and then special oil-proof and waterproof treatment is performed to obtain acrylic medium-temperature hydrolysis-resistant needle-punched filter felt. This filter material dust bag has excellent chemical resistance and hydrolysis resistance, and is widely used in the dust collection of flue gas in power plants, waste incineration, asphalt, cement plants, coal mills, etc.
Acrylic needle-punched felt is one of the commonly used varieties in medium temperature dust removal bags. The average operating temperature is 150°C, and the instantaneous working temperature is 180°C. The medium-temperature acrylic dust bag is made of homopolyacrylonitrile fiber, and the price is higher than that of ordinary polyester needle-punched felt, but it is mostly used in ordinary bag filter. Excessive use of the bag filter will cause the temperature of the flue gas to rise during work, which is fatal to ordinary dust bags. The medium temperature dust bag is a good choice. Acrylic needle felt material, proper post-processing is a good choice for the quality of acrylic needle felt.