TABLE I. Performance requirements - Continued.
Characteristics
Class 1
Class 2
Class 3
Test
Requirements
Requirements
Requirements
Paragraph
Reference
Water vapor transmission rate (WVTR)
4.6.4
(Modulated Infrared Sensor)
As received (gms/100 sq. in./24 hrs.)
0.0005 (max)
0.0005 (max)
0.0005 (max)
Breaking strength (Grab Method)
4.6.5
a. As received (weakest direction) (lb/inch)
50 (min)
25 (min)
65 (min)
b. After aging (weakest direction) (lb/inch)
50 (min)
25 (min)
65 (min)
Puncture resistance (lbs)
15 (min)
6 (min)
22 (min)
4.6.1
Tear strength (lbs)
Not required
Not required
17 (min)
4.6.6
Backing peel strength (oz/in.)
Not required
Not required
7.0 (min)
4.6.7
Aging resistance
No delamination as specified in 4.6.3.1
4.6.3
Blocking resistance
No blocking, delamination, or rupture
4.6.1
Resistance to curl
No curl in excess of 5% or curl back upon itself
4.6.1
Contact corrosivity
No corrosion, etching, or pitting
4.6.1
Oil resistance (delamination)
No leakage, swelling, delamination, or
4.6.1
embrittlement
Water resistance
No delamination
4.6.1
Water resistance of marking
Markings on back of sheet shall be clear and
4.6.1
legible
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