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Peroxide cross-linked polyethylene insulation material for 110kV and below cables YJ-110

This product is a cross-linkable polyethylene insulating material made from low-density polyethylene as the base material through plasticizing and granulation in a closed-loop clean production environment. It features excellent thermal stability and processing performance, and is mainly suitable for the insulation layer of three-layer co-extruded high-voltage power cables of 110kV and below.

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Product details

Performance indicators (typical values)： enforce standardsT/CEEIA 514-2021

1	Volume resistivity（23ºC）			≥1×1014 (Ω·m)	7.4×1014
2	Volume resistivity（90ºC）			≥1×1012 (Ω·m)	1.2×1014
3	Dielectric loss factor(23ºC 50Hz)			≤3×10－4	1.5×10-4
4	Dielectric loss factor(90ºC 50Hz)			≤7×10－4	3.0×10-4
5	Relative dielectric constant(23ºC 50Hz)			≤2.35	2.04
6	Relative dielectric constant(90ºC 50Hz)			≤2.35	2.18
7	Dielectric strength			≥35(MV/m)	37.3
8	Thermal extension 200±3ºC 0.2MPa 15min	Elongation under load		≤80(%)	50
8	Thermal extension 200±3ºC 0.2MPa 15min	Permanent rate of change after cooling		≤5(%)	0
9	Tensile strength			≥17(Mpa)	25.3
10	Elongation at break			≥500(%)	516
11	The number of impurity particles in 1kg of finished product		50μm≤d＜100μm	≤50pieces	12
			100μm≤d＜125μm	≤0pieces	0
			d≥125μm	≤0pieces	0
12	Thermal aging 135±2ºC 168h	Rate of change of tensile strength		≤±20(%)	-3.9
12	Thermal aging 135±2ºC 168h	Rate of change in elongation at break		≤±20(%)	6.4
13	Gel content			≥82(%)	84
14	Low-temperature embrittlement temperature(-76ºC)			≤15/30	0/30

Application process reference

It is recommended that the temperature of the extruder body be between 110℃ and 120℃. Neck temperature: 115℃ Nose temperature: 115℃.

Packaging and storage

The product is packed in a waterproof and dustproof PE inner bag, with a hard corrugated carton for shaping and protection, and an additional waterproof film cover. The standard net weight of each box is 500kg or 600kg.

It should be stored in a clean, dry and well-ventilated environment, with an appropriate storage temperature ranging from 0℃ to 35℃.

3. The stacking height should not exceed two layers, and the upper and lower layers should be neatly stacked. It is not advisable to stack them in a staggered manner.

The validity period is 6 months under suitable storage conditions.