Item | Technical Requirements | ||
Dimensional tolerance | Thickness/% | ±10 | |
Width/% | ±1 | ||
Length/% | Negative values are not allowed | ||
Tensile strength at break (room temperature) MPa ≥ | 7.5 | ||
Tensile strength at break (60℃) MPa ≥ | 2.3 | ||
Elongation at break (room temperature)/% ≥ | 450 | ||
Elongation at break (-20℃)/% ≥ | 200 | ||
Tear strength( KN/m )≥ | 25 | ||
Water impermeability (30min) | Water-impermeable at 0 3Mpa | ||
Low-temperature bending | Not crack at -40℃ | ||
Expansion and shrinkage at heating | Expansion mm ≤ | 2 | |
Shrinkage mm ≤ | 4 | ||
Hot air aging (80℃x168h) | Retention rate of tensile strength at break /% ≥ | 80 | |
Retention rate of elongation at break/ % ≥ | 70 | ||
Alkali resistance | Retention rate of tensile strength at break /% ≥ | 80 | |
Retention rate of elongation at break /% ≥ | 80 | ||
(Saturated Ca(OH) solution, room 2 temperature X168h) | Elongation 40& 500x10-2 | No crack | |
Ozone aging(40℃ x 168h) | Retention rate of tensile strength at break/% ≥ | 80 | |
Retention rate of elongation at break//% ≥ | 70 |