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ADVANCEMENT IN

NOWOVEN FILTRATION

TECHNOLOGY

BY:

MOHAMMAD WALEED BAHTTI

MOHAMMAD ALI RIZWANAHMAD RAZA

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Filtration

Filtration means the capture and retention of

small particles from a moving stream of either

gas or liquid, with minimum resistant to flow.

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What Is Filter Fabric?

Filter fabric is a medium which do not allow the small particle to

micro practical through it and purify the air or liquid.

Nonwoven used for filtration is called nonwoven filter fabric.

Typically, nonwoven fabric manufacturers supply filtration media

having from 1 to !! microns mean flow pore "#F$% ratings.

& non woven filter medium is a porous fabric composed of

random array of fibers or filaments and whose specific function is

to filter and separate phases and component of a fluid being

transported through the medium or to support the medium thatdoes the separation.

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Types Of Filtration Following are the three important types of

filtration.

1%. 'urface filtration.

(%. )epth filtration.

*%. +ltra filtration.

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Surface filtration

t is a screening action by which pores or holes

of the medium prevent the passage of solids.

The mechanisms, filtering and impingement

are responsible for surface filtration.

$articles are collected on the surface of the

membrane.

-ample is cellulose membrane filter.

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Depth filtration

This filtration mechanism retains particulate

matter not only on the surface but also at the

inside of the filter.

This is aided by the mechanism entanglement.

The solids particles are retained in the filter

medium by its internal restriction properties.

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Ultra filtration?

+ltra filtration is a

pressure/driven

membrane transportprocess that has been

applied, on both the

laboratory and

industrial scale.

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Ultra Filtration

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Mechanism Of Filtration By Non Woven

Filter Fabric

& simple fabric tends to clog more rapidly than mass of fabric that is in

felt, non woven0s and bonded fiber wadding.

t is seen that with the passage of time, the filtration efficiency increases

and after some time, it almost reaches to the steady state. This increasing

efficiency with time can be eplained on the basis of the fact that as thedust particle reaches the fabric surface along with air, deposition of dust

particles occurs and as the dust particles deposition continuous, cae

formation taes place which also act as a filter medium.

t is important so that the filter cae should be formed immediately so

that filtration taes place due to the resistance offered by cae then byfabric.

This demand a fabric to have a high filtration rate and maimum

filtration efficiency should be achieved in the shortest possible time.

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pplication Of Non!oven Filter

&utomotive

2ome

Food 3 4everages 5hemical ndustry

n 6il 7efineries &s 6il Filter

5oal Fired $ower 'tations

Face #ass

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The a"vanta#es of usin# non!ovens

7emoval of a wide range of contaminants from water "bacteria, viruses,

metals, minerals etc.%

+niform structure

Tear/ and puncture/resistance

5hemical resistance

2igh retention capacities

2igh air permeability

-cellent abrasion resistance

Flame retardancy &bsorption of fats and oils

2igh level of flow capacity

2igh tensile strength

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"vancement in Non!ovens $ impotance on

other??

Today customer wants better filter media so that their wors

continue with better manner.

5onventional filter has not included that property which customer

want such as higher filtration efficiency, lowest cost.

The most important is that this nonwoven protect human being

from environment pollution and diseases lie 'wine Flu.

ndustrial filters occupy an important place in industrial tetile.

Nonwoven have proved to give a better performance and life than

the woven and are also cheaper.

'ynthetic fibers have proved to give better performance and lifethan the natural fibers.

Nonwoven fabric contributions have been an important mainstay

for the success of the filtration industry is very bright, the filtration

maret has a large number of applications.

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Soli"s separation from li%ui" &surface

Filtration'

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