Various monofilaments (commonly known as healds) are used as the raw material of monofilament filter cloth and are divided into four categories: polyester, nylon, polypropylene, and ethylene. They each have the physical and chemical properties of various synthetic fibers. The surface of the fabric is heat-shrinked and calendered. The product has high filtration efficiency, easy removal of filter cake, easy cleaning, high strength and long service life. This is a new generation of filter media.