Industrial filter cloth is especially suitable for filtration of acid gypsum slurry in sewage treatment plant and phosphoric acid plant. According to foreign reports, it has a long service life and is a new type of filter cloth with great prospects.
The industrial filter cloth is heated by heating, and various fibers are mixed with some resin adhesives and solvents to form a paper sample filter cloth with uniform thickness.
The fiber structure of filter cloth is irregular, disordered and closely arranged, so its strength is not as strong as that of textile filter cloth, and stronger than filter paper, and the porosity is also thicker than filter paper. So the specific resistance is less than the filter paper. Non woven fabric filter cloth has been used in pressure filter and horizontal disc filter, mainly used to clear solid particles in low concentration suspension. Such as beverage, milk, varnish, lubricating oil and vegetable gum filtration. The filtration mechanism of non-woven cloth is roughly divided into filtration, that is, the surface layer of the filter cloth is cut into large particles (more than 100), and the inner layer is cut off the highly dispersed small particles.
The woven filter cloth can improve the filtration performance and physical and mechanical properties of the filter cloth, and the woven filter cloth can be woven into finished products. The processing method includes calendering: pressing the filter cloth under the hot pressing roller to make the fabric surface smooth, reduce the porosity between the fabric yarns, and improve the collection performance and slag discharge capacity of the filter. Cloth. After calendering, the strength of filter cloth decreases slightly. Granular velvet: on the side of the filter cloth, micro toothed steel comb is used to make the fiber bundle on the surface of the filter cloth produce fine velvet, so as to improve the performance of the filter cloth. Small particles were retained to improve separation effect and filtrate quality. Clear. Hot rolling treatment: hot rolling treatment: only for synthetic fiber filter cloth. The purpose is to improve the thermal stability or mechanical strength of the filter cloth and make it more suitable for operation at higher temperature. The material is hot-rolled filter cloth woven by single wire.
(Addtime：2020-7-9)
