Description
Grade 4234 is sioplas (two steps) silane XLPE compound and suitable for 1kv and below low voltage cable, it is composed by 95% silane crosslinkable low density polyethylene (compound A) and 5% catalyst (compound B). The product has outstanding performance in high speed extrusion, smooth cable surface, wild processing temperature, easy processing and convenient to use.
Standard
After crosslinked in the tepid water, the cable made from our product grade 4234 can comply with the standard of IEC60502-2004, GB/T12706-2002.
MainProperties & Typical Values
Test items | Test method | Unit | Standard | Typical value |
Tensile strength | GB/T1040.3 | MPa | ≥16.0 | 21.0 |
Elongation at break | GB/T1040.3 | % | ≥350 | 580 |
Heat ageing properties (Test temperature 135℃, 168hr) Maximum tensile strength change Maximum elongation at break change | GB/T8815 |
% % |
±20 ±20 |
7.0 5.2 |
Heat elongation （200±3)℃x15minx0.2MPa) Maximum elongation change under load Maximum permanent elongation change after cooled | GB/T2951 |
% % |
≤100 ≤4 |
42 -2 |
Impact brittle temp. (-76℃) | GB/T5470 | --- | ≤15/30 | Pass* |
Dielectric Strength | GB/T1408.1 | MV/m | ≥30 | 40* |
Dielectric loss factor 50Hz, 20℃ | GB/T1409 | --- | ≤5.0×10-4 | 3×10-4* |
Dielectric constant 50Hz, 20℃ | GB/T1409 | --- | ≤2.35 | 2.25* |
Volume resistance (20℃) | GB/T1410 | Ω.m | ≥1.0×1014 | 5×1014* |
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 4234.
The recommended equipment and processing technique isas following.
Ratio of length and diameter 18—25:1
Diameter 45—120mm
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 be based on different equipment and pressing conditions, reference settings are asfollowing:
Feeding Section（℃） | Compression Section（℃） | Measurement Section （℃） | Die head and Mould （℃） |
130~155 | 155~170 | 170~180 | 180~200 |
Die head setting: Squeezing extrusion style is recommended
Cooling water temperature: Should not beless than 25℃,gradual cooling water tank is recommended.
3. Crosslink
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 and the 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℃.
Please contact our customer service for more technical service.
Shanghai New Shanghua Polymer Material Co.,Ltd.
Add: NO.55，XinhanRoad,Xinchang Industrial Zone,Pudong Shanghai Tel:021-65193960 Fax:021-65707269
