MICROGARD® 2000 STANDARD Industrial Safety Suits
Normalized Breakdown Time: is the average time between the initial contact of the chemical with the outer surface of the fabric and the time in which the chemical has been detected on the inner surface of the fabric at the penetration rate specified by the appropriate standard .
Key test methods and required normalized penetration rates are listed below:
1) EN374-3 specifies a normalized penetration rate of 1.0ug / cm² / min
2) ISO 6529: 2001 allows results to be reported at a normalized penetration rate of 1.0ug / cm² / min or 0.1ug / cm² / min
3) ASTM F739 specifies that results be recorded as Time to Break (BT) at 0.1ug / cm² / min
In Europe (as specified in EN 14325: 2004) either EN374-3 or
EN ISO 6529: 2001 can be used for penetration tests, as long as the rupture time is recorded at the penetration rate of 1.0ug / cm² / min
All chemical tests and breakthrough times quoted in our publications relate to laboratory tests on fabrics only. Seams and closures may have shorter breakdown times. Final determination of suitability for the application is ALWAYS the responsibility of the user.