Compound E1-M

Moisture crosslinkable compound for medium and heavy
wall heat-shrinkable cable sleeves, for aerial,
underground and direct burial installation.

Compound properties

Compound E1-M is a silane-grafted, moisture crosslinkable compound offering excellent mechanical properties and strain relief. The carefully selected combination of polymers, processing aids and additives makes this compound an excellent choice for the manufacturing of medium and thick wall heat-shrinkable tubings for applications on the power and telecom market for cable joints and terminations at indoor and outdoor applications.
The compound is easy processable and can be extruded on standard PE or PVC screws having a 2:1 pressure ratio.

Compound characteristics

Color Black
Specific gravity ASTM D 792 1.0
Water absorption ASTM D 570 0.15%
MFI (160ºC, 21.6kg) ASTM D 1238 6-8 (*)

Extrusion

Recommended extrusion temperature profile 130ºC - 135ºC - 140ºC - 145ºC - 150ºC

Crosslinking

Recommended time Minimum 72 hours to ensure full crosslinking (**)
Recommended temperature 75ºC at 100% relative humidity (water vapour)
Conditioning 48 hours at 75 C
Hot-set elongation 125 - 175 % (150ºC and 35 gr/mm2 load)

Packaging

To avoid premature crosslinking and to achieve a 6 months shelf-life after date of production, all moisture crosslinkable PTL compounds are packed in aluminium coated bags of 25 kg.
The compound should be stored below 30ºC.

Tubing properties

Heat-shrinkable tubing made of this compound will show a continuous operating temperature of 110ºC. The excellent heat-ageing properties will allow the product to withstand 250ºC for short periods. The non-corrosive properties and its excellent resistance against ingress of chemicals, acids and oils makes this compound an ideal choice for harsh applications.

Technical values

Property Test Method Typical value
 
Physical
Tensile strenght at break ASTM D 638 14 MPa
Elongation at break ASTM D 638 400%
 
Thermal
Continuous operating temperature   -55ºC to +110ºC
Minimum shrink temperature   100ºC
Heat shock (4hrs @ 250ºC) ASTM D 2671 No cracking, dripping, flowing
Heat ageing (168hrs @ 150ºC) ASTM D 638 Elongation 250%
Low temp. flexibility (-55ºC) ASTM D 2671C No cracking
 
Chemical
Fungus resistance   Inert
Fluid resistance ESI 09-13 Excellent
Copper Corrosion ASTM D 2671 B Excellent
 
Electrical
Dielectric strength ASTM D 2671 10-20 kV/mm(***)
Volume resistivity ASTM D 257 10 @ 13 ohm.cm

International specifications
- ESI 09-13

(*) in non-crosslinked state
(**) The crosslinking time is depending on wall-thickness.
(***) Depending on wall thickness.
 
 
 

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