Filter cloth can be divided into textile filter cloth and non-woven filter cloth

Filter cloth is a widely used filter medium with many kinds in industry. Filter cloth can be divided into textile filter cloth and non-woven filter cloth. Its constituent materials are natural fibers (cotton, wool, silk, hemp) or synthetic fibers. The filtration function of filter cloth depends on raw materials, fiber weaving and post-processing. 1. The filter cloth can be divided into polyester, polypropylene, nylon, vinylon, cotton, new and efficient materials according to the material properties. 2. There are two types according to the textile method. (1) Woven fabric. Including polyester, polypropylene, nylon, vinylon, cotton, etc. There are several weaving methods for filter cloth, such as plain weave, twill weave, satin weave and double-layer weave. (2) Nonwovens. Including non-woven fabric, geotextile, filter felt, etc. The methods include spunbond, needling and water weaving. 3. The silk materials of filter cloth are also divided into three types, monofilament, long fiber multifilament and short fiber. (the polyester staple fiber series also includes large chemical fiber and small chemical fiber) When the filter cloth is used as the filter medium of the centrifuge, the drum is equipped with a metal lining net, and the filter cloth is laid on the lining net and fixed. Because the filter cloth is soft and low in strength, the mesh of the lining mesh should be smaller to effectively support the filter cloth and smoothly discharge the filtrate. The filter cloth is required to have satisfactory strength, suitable pore size and porosity, corrosion resistance and wear resistance to the treated materials. There are three weaving methods of filter cloth: plain weave, twill weave and satin weave. The plain weave is more compact, the twill weave is second, and the satin weave is more sparse. The porosity increases in turn. In addition, it should be noted that "mesh" refers to the number of holes on the screen per square inch (1 inch 25.4mm), 50 mesh refers to 50 holes per square inch, and 500 mesh refers to 500 holes. The higher the mesh, the more holes; In addition to indicating the holes of the screen, it is also used to indicate the particle size of the particles that can pass through the screen. The higher the mesh number, the smaller the particle size.