Compound F2-M

Moisture crosslinkable non-tracking compound for heat-shrinkable tubing for indoor and outdoor applications up to 33 kV, to permit clearance reduction, flashover protection against accidential bridging and prevention of pollution flashover.
The compound shows excellent weathering and
non-tracking properties.

Compound properties

Compound F2-M is a silane-grafted, moisture crosslinkable compound offering excellent weathering and non-tracking properties. The carefully selected combination of polymers, fillers, processing aids and additives makes this non-tracking compound an excellent choice for the manufacturing of heat-shrinkable tubings for straight and bent busbars and for use in terminations, railway catenaries, high voltage switchgears , substations and fuse links.
The compound is easy processable and can be extruded on standard PE or PVC screws having a 2:1 pressure ratio.

Compound characteristics

Color Red
Specific gravity ASTM D 792 1.3
MFI (160șC, 21.6kg) ASTM D 1238 6 - 8 (*)
Tracking resistance ASTM D 2303-73 No tracking, no erosion to top surface, no flame failure after:
- 1 hr. @ 2.50 kV
- 1 hr. @ 2.75 kV
- 1 hr. @ 3.0 kV
- 20 min.@ 3.25 kV

Extrusion

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

Crosslinking

Recommended time Minimum 72 hours to ensure full crosslinking (**)
Recommended temperature 75șC at 100% relative humidity (water vapour)
Conditioning 48 hours at 75șC
Hot-set elongation 125 - 175 % (150șC 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 30șC.

Tubing properties

Heat-shrinkable tubing made of this compound will show superior non-tracking characteristics combined with excellent erosion and UV-resistance resulting in an exceptional long-term performance, confirming the material's reliability. The flexibility of the tubings made of F2-M compound makes them an excellent choice for straight and bent busbars, allowing them to be easily positioned.
The low shrink temperature will result in quick and easy installation.

Technical values

Property Test Method Typical value
 
Physical
Tensile strenght at break ASTM D 638 10 MPa
Elongation at break ASTM D 638 400%
 
Thermal
Continuous operating temperature   -55șC to +110șC
Low. temp. flexibility (-40șC) ASTM D 2671C No cracking
Minimum shrink temperature   110șC
 
Chemical
Fungus resistance   Inert
Fluid resistance ESI 09-13 Excellent
Copper Corrosion ASTM D 2671 B Excellent
 
Electrical
Dielectric strength ASTM D 2671 10-15 kV/mm(***)
Volume resistivity ASTM D 257 10 @ 14 ohm.cm
Erosion VDE 0303 Part 1 Class KA3c

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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