PPS - Needle-punched nonwovens
Needle-punched nonwovens (PPS) are deposited in a carding machine to form a fleece; at the same time the individual fibres are joined together to create a fibrous web (fleece)
During fibre processing it is possible to achieve directional orientation and heavier fleeces are produced by using several layers of fibres
Needle punching is the process whereby the fleece is strengthened and compressed by repeatedly puncturing the fibrous web using a number of barbed hooks
A range of different surface structures can be produced using the needle punching process
Image 1

Weight
DIN EN
29073-1
Fibre structure Thickness
DIN ISO
9073-2
Max. tensile strength dry
DIN EN 29073-3
N / 5 cm
Max. tensile strength wet
DIN EN 29073-3
N / 5 cm
Elongation dry
DIN EN 29073-3
%
(g/m²) (mm) length across length across length across
60 90% PES,
10% PP
0,60 75 80 80 85 45 80
80 90% PES,
10% PP
0,60 120 200 110 190 60 90
100 80% PES,
5% PP, 15% V
1,00 130 200 135 220 70 90
110 90% PES,
10% PP
0,75 165 150 165 280 50 65
130 87% PES,
13% PP
1,35 120 220 100 170 100 120
150 90% PES,
10% PP
0,75 170 220 180 300 60 45
400 100% PES 2,5 650 850 650 850 40 50
Setpoint values stated are average values subject to variations in the production process for nonwovens.
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