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Modified polypropylene insulating material for power cables of 35kV and below PJ-35

This product is mainly made of polypropylene resin through mixing, plasticizing and granulation. It is a non-cross-linked cable insulation material, mainly used for insulation of power cables of 35kV and below. Compared with the conventional cross-linked polyethylene cable insulation materials, it has its unique circular economy advantages.

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Product details

Performance indicators (typical values)： enforce standards：T/SHPTA 014. 1 -2021

Serial number	Experimental project		Standard	Typical value
1	Appearance		呈3x4mm的圆形或肩园形颗粒、大小和色泽均匀、无焦炭颗粒,无明显粉末物质	符合
2	Volume resistivity(20℃)		≥1 × 1014 ( Ω·m)	5.4x1014
3	Volume resistivity(90℃)		≥3 × 101 1 ( Ω·m)	6.2x1011
4	Volume resistivity(105℃)		≥1 × 101 1 ( Ω·m)	4.2 × 1011
5	Dielectric loss Angle tangent(20 ° C51Hz)		≤1x10- 3	5.6 × 10- 4
6	Dielectric strength(20℃)		≥35( MV/ m)	40
7	Tensile strength		≥13. 5 ( Mpa)	21.2
8	Elongation at break		≥350(%)	537
9	Density			0.879
10	Thermal deformation		≤40%	1.4
11	Low-temperature embrittlement temperature(-76℃)		≤15/ 30	0/ 30
12	Thermal aging 150℃168h	Rate of change of tensile strength	≤±25(%)	-15.2
12	Thermal aging 150℃168h	Rate of change in elongation at break	≤±25(%)	-11.7

Application process reference

It is recommended that the temperature of the extruder body be between 160℃ and 200℃. Neck temperature: 200℃ Head temperature: 210℃ to 215℃.

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.