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Member Since 14 Years
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| Property | Unit | CHDNW-18 | CHDNW-20 | CHDNW-25 | CHDNW-30 | Test method |
| Thickness | mm | 0.18±0.03 | 0.20±0.03 | 0.25±0.03 | 0.30±0.03 | ISO 9073-2 |
| Mass per unit area | g/m 2 | 65±10 | 70±10 | 80±10 | 90±10 | ISO 9073-1 |
| Tensile strength | N/cm | ≥20 | ≥25 | ≥35 | ≥40 | ISO 9073-3 |
| Elongation | % | ≥12 | ≥12 | ≥12 | ≥12 | ISO 9073-3 |
| Swelling speed | mm/1'00' | ≥4 | ≥6 | ≥8 | ≥10 | GB 450 |
| Swelling height | mm/3'00' | ≥6 | ≥9 | ≥12 | ≥14 | GB 450 |
| Short term stability | °C | 230 | 230 | 230 | 230 | Q/TR.J02.01 |
| Long term stability | °C | 90 | 90 | 90 | 90 | IEC 216 |
| Moisture content | % | ≤6 | ≤6 | ≤6 | ≤6 | ISO 287 |
| Property | Unit | CHDNW-35 | CHDNW-40 | CHDNW-45 | CHDNW-50 | Test method |
| Thickness | mm | 0.35±0.03 | 0.40±0.03 | 0.45±0.03 | 0.50±0.03 | ISO 9073-2 |
| Mass per unit area | g/m2 | 100±10 | 110±10 | 120±10 | 130±10 | ISO 9073-1 |
| Tensile strength | N/cm | ≥40 | ≥45 | ≥45 | ≥50 | ISO 9073-3 |
| Elongation | % | ≥12 | ≥12 | ≥12 | ≥12 | ISO 9073-3 |
| Swelling speed | mm/1'00' | ≥10 | ≥11 | ≥11 | ≥12 | GB 450 |
| Swelling height | mm/3'00' | ≥15 | ≥15 | ≥15 | ≥16 | GB 450 |
| Short term stability | °C | 230 | 230 | 230 | 230 | Q/TR.J02.01 |
| Long term stability | °C | 90 | 90 | 90 | 90 | IEC 216 |
| Moisture content | % | ≤6 | ≤6 | ≤6 | ≤6 | ISO 287 |
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Pachamba, Giridih, Jharkhand 
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