Polypropylene needle-punched filter felt made by high quality of PP fiber not only owns the advantages of common needle punched filter felt, but also has the characters of acid resistance and lower softening point than dacon. So it is used in the condition of high acidity and alkalinity with the working temperature below 100ºC. It often works with liquid separation equipments together. Polypropylene felt which is used for isolation of liquid and solid is made of polypropylene fiber in different specification and high strength thread that can strengthen raw cloth and also need singeing and calendering.
material polypropylene, polypropylene yarn polypropylene, polypropylene high strength yarn
weight (g/m2) 500 550 650
thickness (mm) 2.1 2.3 2.5
air permeability (m3/m2/min) 12.6 10.8 8.4
break strength warp >960 >1200 >1500
weft >1060 >1500 >1800
extension rate at break warp <35 <35 <35
weft <55 <55 <55
breakage strength(Mpa/min) 2.15 2.10 2.10
continuous working temperature(ºC) ≤88 ≤88 ≤88
short-time working temperature(ºC) 110 110 110
acid fastness excellent excellent excellent
resistance to alkali excellent excellent excellent
abrasive resistance excellent excellent excellent
hydrolysis stability excellent excellent excellent
finishing treatment singe or press polish double-faced press polish
