Compound F2-I

Radiation crosslinkable non-tracking compound for heat-shrinkable tubings 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-I is a radiation 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 10
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 dose 60 - 90 kGY
Hot-set elongation 125 - 175% (150șC and 35gr/mm2)

Packaging

The PTL F2-I compound is packed in PE-bags of 25 kg.
A shelf-life of 12 months is achieved if 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-I compound allow them to be easily positioned on straight and bent busbars.
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   100șC
 
Chemical
Fungus resistance   Inert
Fluid resistance ESI 09-13 Excellent
Copper Corrosion ASTM D 2671 B Excellent
 
Electrical
Dielectric strength ASTM D 2671 10-25 kV/mm(*)
Volume resistivity ASTM D 257 10 @ 14 ohm.cm
Erosion VDE 0303 Part 1 Class KA3c

International specifications
- ESI 09-13

(*) Depending on wall thickness.
 
 
 

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