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Needle Punched Felt

Polypropylene Needle Felt

Detail

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 sepration with strong acid and alkali conditions filter press

•Air filtration under 100℃


Specification


Heading Product cord

HDPP

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(N/5 20cm)

wrap

>960

>1200

weft

>1060

>1500

Tensile Elongation(%)

wrap

<35

<35

weft

<55

<55

Broken strength (Mpa/min)

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




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