Silane Cross-Linkable PE Compound for 1KV and Below Cable Wire

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Product Description:

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.


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