2. FEHRER CARDS
Muhammad Asif Raza
10-NTU-6010

3. 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. 3

4. CARDING PROCESS
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5. 5

6. FEHRER SYSTEM
 Randomized webs production
 Areal mass 200 ~ 2000 g/m 2.
 Laminar Airflow.
 Suited to fiber fineness 10 ~ 110
dtex.
 Machines
K12 (first machine)
K21 (New machine)
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V-12-R (Recent Developments)

7. K12 MACHINE
 First Introduced in 1968.
 Weight Range 20 ~ 2000 g/m2.
 Laminar Airflow
 Suitable for coarse fibers (10~110 dtex)
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8. WORKING OF K-12
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9. ADVANTAGES OF K12
 Less 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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10. SPECIFICATIONS
 Working 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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11. APPLICATIONS OF K-12
WEBS
Clothing and furniture industry
wadding
Filter materials.
Make-up pads, etc
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12. 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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13. CHARACTERISTICS OF
FEHRER K-21 WEBS
 Highly isotropic and porous structure
 Lofty 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 13
carriers.

14. WORKING OF FEHRER
K-21
 The 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

15. 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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16. END PRODUCTS OF FEHRER
SYSTEM WEBS
 Interlinings
 Shoe linings
 HIGH-LOFT products for the
garment and furniture industries
 Base material for coating substrates
and
synthetic leather
 Waddings
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17. END PRODUCTS OF FEHRER
SYSTEM WEBS
 Geo textiles
 Filter materials
 Carpets and wall coverings
 Technical felts
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18. 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

19. RECENT DEVELOPMENTS IN
FEHRER SYSTEM
To produce economic webs with
high weights and throughput for,
Insulationfelts,
Waddings for the upholstery and
Automotive industry
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20. RECENT DEVELOPMENTS IN
FEHRER SYSTEM
V-12R
With 5.4m working widths
It 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
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vertically, and there is also a
suction device underneath the

21. RECENT DEVELOPMENTS IN
FEHRER SYSTEM
V-12R
Web 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. 21

22. RECENT DEVELOPMENTS IN
FEHRER SYSTEM
V-12R
An 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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23. RECENT DEVELOPMENTS IN
FEHRER SYSTEM
V-12R
Other advantages of this machine
include;
Space saving design
Low investment costs
Economic production
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24. THANKS FOR LISTENING WITH
PATIENCE
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