PRESSURISED EXPOSURE RESISTANCE
Hydrohead is an indicator for pressurised exposure resistance. The test is based on water column test, stichted and overtaped seams are tight and offer the same barrier as the fabric itself.
PERMEATION RESULTS
Based on permeation test, stitched and overtaped seams are tight and offer the same berrier as fabric.
ANNEXE 5: WHOLE GARMENT PERFORMANCE
500
450
400
350
300
250
200
150
100
50
0 Stitched and overtaped
seam
Tyvek®
B re
ak th
ro ug
h tim
e (m
in ut
es )
N=16 specimens tested Source: Independent laboratory.
>480 >480
Figure 10. Pressurized exposure resistance. Hydrohead DIN EN 20811 (centimeters of H2O).
Figure 11. Permeation EN ISO 6529 with Sodium Hydroxide NaOH 40% (BT 1.0 normalized breakthrough time at 1.0 μg/cm²/min.).
Annexe 5
120
100
80
60
40
20
0
N=16 specimens tested Source: DuPont.
Stitched seam
Bound seam
Stitched and
overtaped seam
Tyvek® fabric
6
20
120 120
67