Jiangsu Dongfang Cable Material Co., Ltd.

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polyethylene sheath

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Polyethylene Sheath

Description

Foreword

Polyethylene sheathing material is a granular plastic made of polyethylene resin as the main raw material, adding an appropriate amount of antioxidants, lubricants and other processing aids through mixing, extrusion and granulation.

Product name, model and purpose

The black polyethylene sheath material produced by our company meets the requirements of the GB/T15065-2009 standard. The product name, model and main use are as follows:

Name	Model	Primary purpose
Black Environmentally Cracking Resistant LDPE Sheathing	NDH	It is used for the sheath of communication cables, control cables, signal cables and power cables with high environmental crack resistance requirements, and the maximum working temperature is 70°C.
Black LLDPE jacket	LDH
Black medium density polyethylene jacket	MH	Used for communication cables, optical cables, submarine cables, power cables, the maximum operating temperature is 90 ℃.
Black HDPE jacket	GH

Performance

Typical mechanical and electrical properties

Experimental project		Units		Specifications
Experimental project		Units	NDH	LDH	MH	GH
Melt flow rate		g/10min	2.0	2.0	2.0	2.0
Density ≥（black）		g/cm³	≤0.940	≤0.940	0.940-0.955	0.955-0.978
Density ≥（not black）		g/cm³	0.915~0.930	0.915~0.930	0.925~0.940	0.935~0.960
tensile strength h ≥		Mpa	13	14	17	20
tensile yield stress ≥		MPa	-	-	-	16
Elongation at break		%	500	600	600	650
Low temperature brittleness, -76°C ≥		-	via	via	via	via
Environmentally resistant to cracking ≥		F₀/h	96	500	500	500
Oxidation rust induction period at 200℃		Min	30	30	30	30
Carbon black content <		%	2.6±0.25	2.6±0.25	2.6±0.25	2.6±0.25
Carbon Black Dispersion ≥		level	3	3	3	3
Vicat softening point		C	-	-	110	110
Tensile strength after heat aging ≥		MPa	-	13	16	20
aged elongation at break ≥		%	-	500	500	650
Low temperature elongation at break ≥		%	-	-	-	175
Dielectric Strength ≥		MV/m	25	25	25	25
Volume Resistivity ≥		Ω.m	1×10¹⁴	1×10¹⁴	1×10¹⁴	1×10¹⁴
Dielectric constant t ≤		-	2.8	2.8	2.75	2.75
Dissipation Factor ≤		-	-	-	0.005	0.005
Dielectric Strength ≥		MV/m
Climate heat aging 0-1008h	Rate of change in tensile strength	%	±25	±25	±25	±25
Climate heat aging 0-1008h	Rate of change in tensile strain at break	%	±25	±25	±25	±25
Climate Heat Aging 504-1008h	Rate of change in tensile strength	%	±15	±15	±15	±15
Climate Heat Aging 504-1008h	Rate of change in tensile strain at break	%	±15	±15	±15	±15
Environmental performance (if applicable)			Meet EU ROHS Directive
Termite resistance (if applicable)			Conforms to JB/T 10696.9 test population law level 2 regulations
Rat resistance (if applicable)			Compliant with JB/T 10696.10 protection level qualified (general and above)
Anti-algae and antibacterial			Complies with GB/T24127-2009 test level 0 regulations

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	Head
Temperature ℃	DH, NDH, LDH	170	180	190	200	210	210	200
	MH	175	185	195	200	215	215	210
	GH	180	190	200	210	220	220	210

Packaging, Shipping, Storage

1. The inner bag of the product is packed with polyethylene film bags, and the outer bag is packed with plastic woven bags or composite bags. The net weight of each bag is 25± 0.2kg, and other packaging and unit net weights can also be used.

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, and the storage period is 6 months from the production date.