Grade 4244Q is sioplas (two steps) silane XLPEcompound for low voltage cable with small cross sectional area, it is composedby silane crosslinkable low density polyethylene (compound A) and silane crosslinkable catalyst (compound B). Compound A is grafted by high activity silane and special PE compound, while compound B adopts the advanced cataly stsystem. The product has outstanding performance and major characteristics are
◆The product is suitable for the extrusion method of tubing extrusion.
◆Cables made from the product have excellent performance in smooth cable surface, high extrusion speed and production efficiency.
◆Suitable for cable cross-sectional area less than 16mm2.
◆Low processing temperature and cost saving.
Performance test is in accordance with JB/T 10437-2004 standard. After crosslinked in the tepid water, the cable made from the product grade 4244Q can comply with the standard of IEC60502-2004, GB/T12706-2002.
Main Properties & Typical Values
Elongation at break
Heat ageing properties (Test temperature 135℃, 168hr)
Maximum tensile strength change
Maximum elongation at break change
Heat elongation （200±3)℃x15minx0.2MPa)
Maximum elongation change under load
Maximum permanent elongation change after cooled
Volume resistance (20℃)
Typical values were tested on the 1mm sample strip by squeezing film extrusion after mixing compound of A& B (at percentage of 95:5) and be boiled in hot water at 90℃ for four hours.
*Especially, these typical values were tested by press moulding sample under the condition of 180±2 ℃, 15min, and pressure over 15Mpa, then boiled in 90℃ water for four hours.
Recommended Processing Technique
1. Extrusion Equipment
Most extruders for PVC and PE suit for 4244Q.
The recommended equipment and processing technique is as following.
Ratio of length and diameter 18—25:1
Ratio of compressing 1.5—3.5
Ratio of elongation 1:1.0—1:1.5
Filtering mesh 40/60/40
2. Extruder processing temperature and other related settings
Temperature Setting: Specific processing temperature should bebased on different equipment and pressing conditions, reference settings are as following:
Die head and Mould
Die head setting: Tubing extrusion style
After extrusion and cooling, the cable can be crosslinked by immersed in hot water (90℃) or exposed in low pressure vapour. The time required for crosslink is based on the thickness of the insulation and the coil size, the thicker the insulation andthe greater the coil size, the longer the crosslink time required. The crosslink time can be calculated according to the equation of 4hr/mm for 90℃.