FEHRER CARDS

Muhammad Asif Raza10-NTU-6010

AIR-LAID WEB FORMATION

The air-laying process belongs to a group of web formation processes by dry-laying, which use air as conveyance means, from the preparation of the raw material to the web formation system.

The process consists in conveying the fibers, by aerodynamic flows, through perforated rotary rollers or through distribution systems, to form the web and deposit it on a conveyor belt.

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CARDING PROCESS

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FEHRER SYSTEMRandomized webs productionAreal mass 200 ~ 2000 g/m2.Laminar Airflow.Suited to fiber fineness 10 ~ 110

dtex.Machines

K12 (first machine)K21 (New machine)V-12-R (Recent Developments)

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K12 MACHINEFirst Introduced in 1968.

Weight Range 20 ~ 2000 g/m2.

Laminar Airflow

Suitable for coarse fibers (10~110 dtex)

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WORKING OF K-12

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ADVANTAGES OF K12Less web weight at the same web

height, or increased web height at the same web weight.

Improved web resilience and elasticity.

Enhanced web precision.

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SPECIFICATIONSWorking widths (m): 1.2 - 5.4

Production speeds (m/min): up to 30

Weight range (g/m2): 40 - 3000 * in special configuration up to

6000 Capacity(kg/m/h): up to 450

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APPLICATIONS OF K-12 WEBSClothing and furniture industry

wadding

Filter materials.

Make-up pads, etc

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K-21 MACHINE Lighter wt. air Laid system Fabric of wt. 10~100 g/m2. Four Carding cylinders Fibers deposited in four different positions

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CHARACTERISTICS OF FEHRER K-21 WEBSHighly isotropic and porous structureLofty and good compressional

characteristics.Soft Handle of webs formed.High Absorbency and wicking rate.High thermal resistance.Fibers from 1.7 to 3.3 dtex can be

processed on the K21 to produce webs for hygienic and sanitary applications, for interlinings and basic material for cleaning cloth as well as coating carriers.

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WORKING OF FEHRER K-21The K21 can follow a roller card or

a combination of roller card and horizontal web laying device.

It is, however, also offered by the manufacturer as an installation together with the pre-web forming device V21/R.

The characteristic feature of the K21 is the use of four successive card cylinders which are each equipped with a pair of working/clearer rollers. 14

WORKING OF FEHRER K-21 A pre-web is fed via a tray feeding device (1) to

the first card cylinder (2). Due to the centrifugal force, this cylinder throws

part of the fibre amount through a fibre guiding channel (3) onto the suction screen belt (4), the majority of the fibres is transferred to the second card cylinder (5).

This is done in an analogous way when transferring the material to the following card cylinders.

A four-layer web is produced, the layers of which are inseparably linked to each other due to the three-dimensional depositing of the fibres.

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END PRODUCTS OF FEHRER SYSTEM WEBS

InterliningsShoe liningsHIGH-LOFT products for the

garment and furniture industriesBase material for coating

substrates andsynthetic leather

Waddings16

END PRODUCTS OF FEHRER SYSTEM WEBS

Geo textiles

Filter materials

Carpets and wall coverings

Technical felts

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Comparison

K-12 K-21

Weight 20 ~ 2000 g/m2 10 ~ 100 g/m2

Fiber 10 ~ 110 Dtex 1.7 ~ 3.3 Dtex

Width 1.2 ~ 2.0 mtr upto 5.4 mtr

RECENT DEVELOPMENTS IN FEHRER SYSTEM

To produce economic webs with high weights and throughput for, Insulation felts, Waddings for the upholstery

and Automotive industry

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RECENT DEVELOPMENTS IN FEHRER SYSTEM

V-12RWith 5.4m working widthsIt consists of a smooth pressure

roller, inlet roller, nose bar, picker and a perforated drum with a suction device inside.

The perforated drum can be adjusted both horizontally and vertically, and there is also a suction device underneath the sieve conveyor. 20

RECENT DEVELOPMENTS IN FEHRER SYSTEM

V-12RWeb forming zone with suction

from both sides, which provides all the benefits derived from isotropy.

Textile waste fibres, synthetic fibres, all natural fibres (e.g. coir, sisal, jute hemp, flax, cotton) and animal fibres, as well as fibre blends can be run on this machine.

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RECENT DEVELOPMENTS IN FEHRER SYSTEM

V-12RAn economic machine to the

market which, depending on type of the fibre used, has a weight range of 300 - 6000 g/m2 and a throughput of up to 1500 kg/m/h

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RECENT DEVELOPMENTS IN FEHRER SYSTEM

V-12ROther advantages of this

machine include;Space saving design Low investment costs Economic production

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THANKS FOR LISTENING WITH PATIENCE

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