Product

Super-semi-conductive PE, PVC sheath material and radiation

cross-semi-conductive shielding material for high-voltage cables

♦ Product name, model, purpose

Product Number	Product Name	Features and Uses
GEBDH	Over 110KV or special super semi-conductive PE sheath for submarine cable	Easy to process, good adhesion with PE-based insulation layer or lead sheath of submarine cable, 110KV conductive layer thickness 0.3mm instead of graphite coating.
GEBZH	Super semi-conductive flame-retardant PE sheath for 110KV or above or other fields	Easy to process, good adhesion with PE-based insulating layer, and the thickness of the conductive sheath above 110KV is 0.3mm instead of graphite coating.
GVBDH	Special super semi-conductive PVC sheath for 110KV and above	Easy to process, good adhesion with PVC-based insulating layer, the thickness of the conductive sheath above 110KV is 0.5mm instead of graphite coating.
GVBZH	Special flame-retardant super semi-conductive PVC sheath for 110KV and above	Easy to process, good adhesion with PVC-based insulating layer, the thickness of the conductive sheath above 110KV is 0.5mm instead of graphite coating.
EGDH	Thermoplastic highly conductive plastics for railway through ground wires	Volume resistance ≤0.62cm, can replace metal sheath, railway through ground wire and other occasions.

♦ Product Manual：

The product of this project is based on PE and PVC resin, adding nano-level conductive carbon black, through toughening technology, through special

The manufacturing process is a conductive plastic made by mixing plasticization and granulation. The physical properties and process extrusion characteristics of the product refer to PE, PVC

The standard of the sheath, especially the thin-walled double-layer co-extrusion surface is smooth and round, and it is tightly bonded with the insulating layer without interface reaction, which is beneficial

It maintains long-term stable and reliable cable performance and is an ideal substitute for graphite.

♦ Product Performance：

Typical values see table（2)

♦ Reference Standard：

User Standard

♦ Processing Technology：

For thin-wall double-layer co-extrusion (for single-screw extrusion), it is recommended to place a filter screen of 60 or 80 yards in one layer. Drying temperature 70℃,

Time 2 hours. The recommended temperature of each zone of the extruder is as follows:

District	1	2	3	4	5	Guide glue (machine strength)	Die head (1)	Die head (2)
Temperature ℃	145	150	155	160	165	160	167	167-172

Note: The above temperature adapts to the reference temperature of super-semiconducting PE and PVC extrusion above 110KV. The final temperature will be adjusted according to the extrusion conditions of the equipment.

♦ Product packaging, storage and transportation：

Use moisture-proof packaging, refer to foreign PE base material moisture-proof heavy packaging or aluminum-plastic composite bag. The net weight of each bag is (25kg±0.2) 40 bags as a set of ton packaging with wooden pallets and PE film sealed to keep moisture-proof, rain-proof, sun-proof and clean environment for easy transportation. The storage warehouse is required to be ventilated and dry. The normal temperature of the warehouse is about 0℃~35℃. The storage period of the product should not exceed six months from the date of production.

Product performance

Pilot projects	category	Super semi-conductive PE sheath		Flame-retardant semi-conductive PE sheath		Super semi-conductive PVC sheath		Flame-retardant semi-conductive PVC sheath		Highly conductive polyene warp material
Pilot projects	category	GEBDH		GEBZH		GVBDH		GVBZH		EGDH
GB Standard test method	Unit	Standard Value	Typical Value	Standard Value	Typical Value	Standard Value	Typical Value	Standard Value	Typical Value	Typical Value
Density	g/cm3	≤1.15	1.14	≤1.35	1.37	≤ 1.37	1.39	≤1.40	1.45	1.2
Stretch	Mpa	≥12.5	15	≥12.5	13.8	≥12	13.5	≥12	13	12
Elongation at break	%	≥450	560	≥400	510	≥150	200	≥150	195	200
Thermal aging of air box	℃×h	100×168	passed	100×168	passed	100×168	passed	100×168	passed	80×240
Tensile strength change rate	%	±25	7	±25	5	±25	8	±25	5	4
Change rate of elongation at break	%	±25	-10	±25	-12	±25	-11.7	±25	-12	-6
Volume resistivity at 23℃	Ω·cm	≤100	5~80	≤100	30	≤100	29.5	≤100	35	0.5Ω·cm
Embrittlement temperature	℃	-45	passed	-45	passed	-15	-20 passed	-15	passed	-15℃
Resistance to environmental stress cracking	h	≥500	passed	≥500	passed	—	—	—	—	—
Thermal stability time at 200℃	MV/m	—	—	—	—	≥80	passed	≥80	passed	—
Oxygen Index	%	—	—	≥28	29.5	—	—	≥28	30	—
Thermal weight loss	g/m²	—	—	—	—	≤20	18	≤20	20	—
Thermal deformation	%	—	—	—	—	≤40	28	≤40	25	—
Shore D hardness	—	—	—	—	—	—	—	—	—	—

Note: The typical value cannot be regarded as the standard of the specification limit or the design basis separately quoted.

Density is not used as a basis for judging whether a material is qualified, but only as a reference for material consumption, which is not equivalent to ordinary materials.

PRODUCT