NMW is a medium wall semi-rigid sleeving, available in black 1.2mtr unlined lengths, It comes in a range of sizes up to 230mm diameter. NMW is available in a shrink ratio of typically 3:1 and benefits from the wall thickness where wear resistance and mechanical strength are important.
It is also available with a hot melt adhesive lining NMWA, or with a mastic sealant NMWA(S). These combine the attributes of the unlined material with the benefit of the lining, making it the ideal solution to cable jointing and repairs, both above and below ground where it protects against ingress of moisture, salt water and chlorine attack.
Physical Properties
| Shrink ratio | Typically 3:1 |
| Material | Cross-linked polyolefin with respective lining where applicable |
| Flexibility | Semi rigid |
| Colours | Black |
| Tensile strength | 14.0N/mm” |
| Ultimate elongation | 300% min |
| Relative density | 1.1 max. |
| Longitudinal change | 10% max. |
Thermal Properties
| Operating temperature range | -55°C to + 80°C |
| Shrinkage temperature | >120°C |
| Storage stability | Very good |
Electrical Properties
| Dielectric strength | 20KV/mm |
| Volume resistivity | 10Õ4ohm.cm. |
Chemical Properties
| Water absorption | 0.4% (24h at 25°C) |
| Corrosion | Non-corrosive |
| Flammability | Self-extinguishing (tubing only) |
| PRODUCT CODE REF. | Internal Diameter (mm) | Nominal wall thickness (mm) after heating (full recovery) | Standard reel size (mtrs) | |
|---|---|---|---|---|
| Expanded As supplied min. | Recovered after heating max. | |||
| NMW12/3 | 12 | 3 | 2 | 1.2 |
| NMW20/6 | 20 | 6 | 2 | 1.2 |
| NMW25/8 | 25 | 8 | 2 | 1.2 |
| NMW30/10 | 30 | 10 | 2 | 1.2 |
| NMW34/10 | 34 | 10 | 2 | 1.2 |
| NMW40/12 | 40 | 12 | 2 | 1.2 |
| NMW45/13 | 45 | 13 | 2 | 1.2 |
| NMW54/18 | 54 | 18 | 2 | 1.2 |
| NMW70/25 | 70 | 25 | 2 | 1.2 |
| NMW90/30 | 90 | 30 | 2.4 | 1.2 |
| NMW122/40 | 122 | 40 | 2.6 | 1.2 |
| NMW170/58 | 170 | 58 | 2.8 | 1.2 |
| NMW230/77 | 229 | 77 | 3 | 1.2** |
* Please prefix the above numerical reference with NMWA for hot melt adhesive, and NMWA(S) for the mastic sealant.
** Non-standard size available on request.