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.