In addition to the advantages of ordinary needle-punched filter felt, PTFE coated needle-punched filter felt has better acid resistance, alkalinity and lower softening point than polypropylene fiber, and the hydrolysis stability of polypropylene is excellent. Membrane needle-punched filter felt is generally used in the case of flue gas temperature below 100 °C and acid, high alkalinity or liquid-solid separation field with large acidity and alkalinity. With plate and frame rolling filter, vacuum suction filter, bag type Filters, centrifugal filters and other liquid filtration separation equipment are used.
PTFE coated needle-punched filter felt is used for liquid-solid separation. Different sizes of polypropylene fiber are used, and woven base fabric is woven with ordinary short-fiber base fabric or high-strength filament. The weight is from 350g/m2 to 700g/m2 and the thickness is from 1.2mm~ 4.5mm, width 3.4m, coated needle-punched filter felt and can be cut to various widths, can be processed by hot-rolling singeing.