High Quality Industrial Fiberglass Antistatic Film Coated Filter Cloth (needled Felt)
Fiberglass filtration materials are made by fast pulling from the melted glass liquid. It is a kind of inorganic non-woven filtration material fiberglass is usually divided into two types: 1, aluminum boron silicate glass fiber, called non-alkali fiberglass(R2O-alkali metal oxide content in less...
Fiberglass filtration materials are made by fast pulling from the melted glass liquid. It is a kind of inorganic non-woven filtration material fiberglass is usually divided into two types: 1, aluminum boron silicate glass fiber, called non-alkali fiberglass(R2O-alkali metal oxide content in less than 0.5%). 2, sodium-calcium silicate fiber called middle-alkali fiberglass(content of R2O-alkali metal oxide between 0.5%~1.2%). Compared with organic synthetic fibers, it has high tensile strength, and the elongation is relatively small. Fiberglass has very good temperature resistance. Its shrinkage at 280℃ is zero. Glass fiber can resist most of the chemicals except hydrofluoric acid, strong acid, and strong alkali at room temperature and the alkali at high temperature. But its resistance capability of hydrolysis is relative bad. Storing in the condition of 100% relative humidity for 128 days, the strength will reduce 16% and 21% for non-alkali and middle-alkali fiberglass.
Due to the special component of fiberglass, it does not have very good water and corrosion resistance. Its resistance to curving is also not good. Therefore the filtration materials contains fiberglass must apply the post-processing. That is to improve the combination between the felt layer and the fabric layer, protect the felt and fabric from corrosion. It will also improve the ability of dust stripping from the felt.
Based on different industry conditions, we can produce the filtration felt using fiberglass as fabric and combine different high-temperature fiber with fiberglass in certain proportion as the felt layer. The products are applied in blast furnace gas, calcium carbide, out let of cement kiln, cement grinding machine, preheated dryer and carbon filtration. We can provide product made by different formulation based on request of customers’ industry condition.
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.
Polyester film coated needled felt
Filtration wind speed
Dust particle size≥5µm
Continuous Working Temperature
Instantaneous Working Temperature
Acid and alkali resistance
Dust Stripping Rate(%)
Static Dust Catching Rate(%)
Dynamic Dust Catching Rate(%)