Industrial Anti-acid PPS(Polyphenylene Sulfide) Antistatic Filter Cloth (needled Felt)
PPS non-woven needled felt has excellent resistance to chemical and good hydrolysis stability. The property makes it to be the best choice of the filtration material for the industry condition with abnormal dew point. It can long-term work under the temperature of 190℃ and can short term stand...
PPS non-woven needled felt has excellent resistance to chemical and good hydrolysis stability. The property makes it to be the best choice of the filtration material for the industry condition with abnormal dew point. It can long-term work under the temperature of 190℃ and can short term stand up to 220℃. Compared with aromatic polyamide fiber, it has better hydrolysis stability. The strength if fiber will not reduce even in 160℃ and 79% of relative humidity conditions for 500 hours. But its antioxidant ability is bag, therefore, it is particularly important to know the actual temperature, oxygen content NOX content in order to ensure the longer using life the product must have the special treatment if dipping and size-fixing at high temperature. It is also needed to suggest the working temperature at the range of 145℃ ~160℃ to ensure the optimum operation. The material is the best choice for the application of bag-mode dust catcher for the domestic coal-fired boilers. Our PPS filtration bag is widely applied in the dust catcher for the coal-fired boilers of 75T, 120T, 240T, 420T, 490T and 1000T. The performance is quite good.
The antistatic property of non-woven needled of felt filtration bag(material)
Some fiber(especially for synthetic fiber) has high electric resistance and easily to carry electric charge. The common polypropylene felt’s surface resistance can reach 1×1014Ω. Friction on the surface of the felt for one minute can produce 2000V high-voltage electrostatic, the half-life is 1600s. The sparks occurred while the electrostatic is discharged. The sparks may cause the burning of the flammable dust inside the dust catcher. It may also cause explosion when the dust concentration reach explosion limit. Some easy charged dust concentration onto the surface of the filtration resistance. The high load will damage the filtration bag.
In addition, some dust scatters in the air, it may also cause explosion when the dust reach to certain concentration and when dust meets the sparks. Most explosive dust has particle size of 1-150um. The smaller the particle is the bigger the surface area is and the easier to cause the flame. For the dust collection of inflammable and explosive dust, we must choose the anti-static filtration materials even take special fire retardant or explosion-proof method.
In order to prevent the electrostatic hazards, we must use the conductive anti-static filtration material in certain industry conditions. The anti-static property will make the filtration material easily release the surface charge into the ground.
Our production technology to produce the non-woven felt line products with anti-static function. The method is listed as follows:
Add anti-static thread into the fabric for non-woven needle felt.
Add conductive fibers into the fiber nets for non-woven needled felt filtration material.
Stainless steel fiber and modification conductive(carburizing) chemical fiber are commonly used. The filtration material with flame retardant properties generally refers to the fibers with limit oxygen index(LOI) more than 30. For example, PPS, P84, and PTFE fibers are safe.
For the fibers with LOI less than 30, such as polypropylene fiber, polyamide, polyester, and other filtration materials, our company can apply the flame retardant dipping treatment to reach the safety goal based on user needs.