Jiangsu Dongfang Cable Material Co., Ltd.

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Peroxide cross-linked semiconductive shielding compound for XLPE insulated cable conductors

Category:

Shielding Material

Description

Foreword

Peroxide cross-linked semiconductive shielding material for conductors of XLPE insulated cables for medium and high voltage cables (referred to as inner shielding material) is made of EVA resin and conductive carbon black as the main raw materials. Oxygen, cross-linking agent and other processing aids are mixed, extruded and granulated.

Product name, model and purpose

Name	Model	Primary purpose
Peroxide cross-linked semiconductive shielding compound (referred to as inner shielding compound) for XLPE insulated cable conductors	PYJD	Used for 35KV and below power cables, etc.
Peroxide cross-linked anti-sag semiconductive shielding compound for XLPE insulated cable conductors	FQRPYJD	Used for 35kv and below power cables, etc.

Performance

Typical mechanical and electrical properties

Experimental project		Units	Specifications
Experimental project		Units	PYJD	FQRPYJD
Density		g/cm³	≤1.20	0.95-1.20
tensile strength		MPa	≥12.0	≥15
Elongation at break		%	≥180	≥200
Air heat aging test
Test conditions	Heat aging temperature	℃	135±2	135±2
Test conditions	Duration	h	168	168
Rate of change in tensile strength		%	±30	±30
Rate of change in elongation at break		%	±30	±30
Heat stretch
Test conditions	Temperature	℃	200±2	200±2
	Mechanical load	MPa	0.2	0.2
	Load time	min	15	15
Elongation under load		%	≤100	≤175
Permanent deformation after cooling		%	≤15	≤10
20℃ volume resistivity		Ω.cm	≤100	≤100
90℃(70℃)Volume Resistivity		Ω.cm	≤5000	≤2500
Volume resistivity after air thermal aging
Test conditions	aging temperature	℃	100±2	100±2
Test conditions	Duration	h	168	168
90℃(70℃)Volume Resistivity		Ω.cm	≤1000	≤1000

Instructions

If the product needs to be dried before use when the product has a long storage period, it is recommended to use blast drying. It can be extruded with a single screw extruder of L/D≥25. It is better to enter the hot material into the extruder. Recommended reference The extrusion temperature is as follows:

Workspace	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5	Zone 6	Zone 7	Zone 8	Head
Temperature ℃	70	85	95	105	105	105	110	110	110

Packaging, Shipping, Storage

1. The product 500Kg is a package, the inner bag is a polyethylene film bag, and the outer packaging is a rigid carton, which is placed on a wooden or plastic bracket.

2. Transportation and storage

The product shall not be exposed to sunlight and rain during transportation, and shall be kept clean, dry, free from contamination, and kept in a complete package.

The product should be stored in a clean, dry, cool and ventilated warehouse. The storage period starts from production 6 months from the date.

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