Material Properties
Insulation & Sheath Material Properties Related To Fireproof of Cable

Oil resistant
AEI CT09-38:CT06-81A Oil resistant flexible silane crosslinkable HFFR sheathing
Oil resistant, flexible, halogen free, flame-retardant, silane crosslinkable insulation and sheathing for cable applications

Extruder
Many modern thermoplastic extruders will process the material although a screw designed to give good homogenisation without excessive shear (which could cause unacceptable increases in melt temperature) should be used. An extruder with an L/D ratio (length/diameter) of 15-24 and an extruder screw with a compression ratio 1.2:1 to 2:1 are recommended.
Extruder temperature conditions
As a guide the following temperature profile is suggested when using the recommended extruder and screw designs. However, this profile will vary depending on extruder type, head design and output and should be chosen so that the melt temperature is not allowed to rise above 190°C. The residence time in the extruder should be below three minutes to achieve optimum extrusion quality. A typical temperature profile for a 2:1 screw design is below:-
Zone 1Zone 2 Zone 3Zone 4 Head Die
100°C130°C145°C155°C160°C165°C
Any initial purging of extruder should be performed without catalyst masterbatch addition to reduce risks of pre-curing.
Screw water temperature - 40-60°C if available
Recommended screen pack Spacer ring or beaker plate only
Crosslinking or Cure
A satisfactory cure can also be obtained either by immersion in hot water or exposure to low pressure steam at a temperature up to 75°C.
Catalyst and colour masterbatches
CT06-81A catalyst masterbatch is normally added at a 3% addition rate. Addition of approved colour masterbatches, including black, up to a maximum of 1%, has no detrimental effect on the properties or crosslinking capability.
It is recommended that all masterbatches, including those containing the catalyst, should be thoroughly dried at 60°C for 8 hours.
Storage & shelf life
A period of at least 6 months from date of manufacture can normally be expected. The following storage conditions are recommended:-
 Packaging should remain sealed
 Avoid temperature above 25°C
 Avoid storage outside and in direct sunlight
 Use within 8 hours of opening packaging (re-seal container lining completely if it is to be left for longer period)