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Linear low-density polyethylene sheath material LDH

This product is mainly applied to overhead cables of 1kV and below.

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Product details

Product model and name:

LDH linear low-density polyethylene sheath material

Performance indicators (typical values) : Execution standard: GB/T15065

Serial number	Test project		Unit	Indicator	Typical value
1	Melt flow mass rate		g/10min	≤0.4	0.3
2	Density		g/cm3	≤0.940	0.928
3	Tensile strength		MPa	≥13	15
4	Elongation at break		%	≥500	650
5	（-76℃）Impact embrittlement performance		失效数	≤15/30	5/30
6	Resistance to environmental stress crackingF0		h	≥96	100
7	Air thermal aging	Test conditions	100℃×240h
		Tensile strength	MPa	≥12	14
		Elongation at break	%	≥400	480
8	Dielectric strength		kV/mm	≥25	28.6
9	Volume resistivity		Ω.m	≥1×1014	2.6×1014
10	Artificial climate aging: 0 to 100 hours	Rate of change of tensile strength	%	±25	18
	Artificial climate aging: 0 to 100 hours	Rate of change in elongation at break	%	±25	15
	Artificial climate aging: 504 hours to 1008 hours	Rate of change of tensile strength	%	±15	10
	Artificial climate aging: 504 hours to 1008 hours	Rate of change in elongation at break	%	±15	8

Application process reference

It is recommended that the temperature of the extruder body be 130 to 200℃. Head temperature: 190℃ to 210℃. It is recommended to use a polyethylene-specific screw with a compression ratio of 2.8 to 3.2.

Packaging and storage

Black weather-resistant low-density polyethylene insulating material is packed in double-layer polyethylene film, sealed and packaged, then placed in hard corrugated cartons that are not prone to damage, and covered with waterproof film sleeves. Each carton has a net weight of 600kg.

It should be stored in a clean, dry and well-ventilated environment. The suitable storage temperature is 0℃ to 35℃.

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.