PP (polypropylene) needle punched felt is an economical yet highly chemical-resistant filter material designed for both dry and wet filtration processes. It performs excellently in acidic and alkaline environments, making it ideal for use in chemical manufacturing, food processing, and wastewater treatment facilities. Thanks to its hydrophobic nature, PP felt is also resistant to moisture absorption, which helps reduce clogging and maintain airflow. With a lower melting point than polyester, it suits low to moderate temperature applications where chemical compatibility is critical.
PP needle punched felt
Polypropylene is a relatively low temperature fiber with quite excellent chemical resistance which finds use in specialist applications such as the chemical industry.
The fibers cannot hydrolyse, the only chemical weakness being a susceptibility to oxidising agents. Other than that they can be used almost universally provided the temperature is below 90°C.The fiber is of a low density (it floats in water) and so a given denier of fiber is much larger in diameter than the polyester equivalent. This leads to felts being quite thick, almost 50% thicker than for the same polyester weight.The fiber is very prone to static build up so the felts are often augmented by the incorporation of either conductive fibers or a conductive scrim or a combination of the two. This then helps to dissipate potential static electric discharges.
Features:
Smooth surface, more defined pore size and good air permeability
Low temperature resistance ( 88-110 ℃)
Excellent resistant to hydrolysis, acids and alkalies.
Lower fiber release, Lower density,High mechanical characteristics
Applications:
Galvanic industry and Chemical industry
Prefiltering solvents and acids
Prefilter to extend final filter life
Final filter for noncritical filtrations
Liquid-solid seperation with strong acid and alkaline conditions filter press
Air filtration under 100℃
Specification
Compositions | PP/PP ordinary scrim | ||
Weight (g/ m2) | 500 | 550 | |
Thickness (mm) | 2.1 | 2.3 | |
Air permeability (L/m2/s) | 12.6 | 10.8 | |
Tensile strength | wrap | >960 | >1200 |
weft | >1060 | >1500 | |
Tensile Elongation(%) | wrap | <35 | <35 |
weft | <55 | <55 | |
Broken strength | 2.15 | 2.10 | |
Continuous working temperature(℃) | 88 | 88 | |
Short time Working temperature(℃) | 110 | 110 | |
Anti-acid | Excellent | Excellent | |
Anti-alkali | Excellent | ||
Anti-abrasion | Excellent | ||
The stability of water solution | Excellent | ||
Finishing treatment | High temperature hot pressing,Singeing | ||
