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