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S/N | Items | Index | ||||||||||||
Thickness(mm) | 0.75 | 1.00 | 1.25 | 1.50 | 2.00 | 2.50 | 3.00 | |||||||
1 | Density (g/m2) | ≥0.94 | ||||||||||||
2 | Yield strength(N/mm) | ≥11 | ≥15 | ≥18 | ≥22 | ≥29 | ≥37 | ≥44 | ||||||
3 | Breaking strength(N/mm) | ≥20 | ≥27 | ≥33 | ≥40 | ≥53 | ≥67 | ≥80 | ||||||
4 | Yield elongation(%) | ≥12 | ||||||||||||
5 | Break elongation(%) | 700 | ||||||||||||
6 | Tear resistance(N) | ≥93 | ≥125 | ≥160 | ≥190 | ≥250 | ≥315 | ≥375 | ||||||
7 | Puncture resistance(N) | ≥240 | ≥320 | ≥400 | ≥480 | ≥540 | ≥800 | ≥960 | ||||||
8 | Stress crack resistance(h) | ≥300 | ||||||||||||
9 | Carbon black content(%) | 2~3 | ||||||||||||
10 | Carbon black dispersion | Nine out of the ten observation areas should belong to the 1st or 2nd level, and the 3rd level should not be more than once. | ||||||||||||
11 | Oxidation induction time(OIT), (min) | Oxidation induction time under normal pressure≥100 Oxidation induction time under disjoining pressure≥400 | ||||||||||||
12 | 85°C thermal aging (rentention rate of OIT under normal pressure after 90d) (%) | ≥55 | ||||||||||||
13 | Ultraviolet resistance(reteintion rate of OIT after 1600h ultraviolet irradiation) (%) | ≥50 | ||||||||||||























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