电线电缆用黑色聚乙烯塑料技术规范_Anhui Honglin Instrument Cable Co., Ltd.

Technical specification for black polyethylene plastic for wire and cable

Author：hlyb Add Time：2016-04-18 11:21:36

This specification is prepared according to the standard of black polyethylene plastic for wire and cable (GB / T 15065-2009).

1 Scope

This specification specifies the requirements, test methods, inspection rules, packaging, marking, accessories, transportation and storage of black polyethylene plastics for wires and cables (hereinafter referred to as PE materials).

2 reference standards

GB 1033 test methods for density and relative density of plastics

GB 1040 plastic tensile test methods

GB 1410 test methods for volume and surface resistivity of solid insulation

GB2951. 7 "thermal aging test method for air box of wires and cables"

Gb5470 test method for impact embrittlement temperature of plastics

3 product category

3.1 specifications

The products are black cylindrical particles with a diameter of 3 MM-4 mm and a length of 2 MM-4 mm or square particles of equivalent volume.

3.2 classification

See Table 1 for product classification and name.

Table 1 product classification and name of PE material

category	Code name	Product name	Main uses
Sheath material	NDH	Black environmental cracking resistant LDPE sheath compound	It is used for the protective layer of communication cable, control cable, signal cable and power cable with high requirements of environmental cracking resistance, and the high working temperature of * * is 70 ℃.
	LDH	Black linear low density polyethylene sheathing compound
	MH	Black MDPE sheath material	Used for communication cable, optical cable, Haiti cable, power cable, * high working temperature 90 ℃.
	GH	Black HDPE sheath material
Insulating material	NDJ	Black weather resistant LDPE insulating material	It is used for overhead cable of 1kV and below or other similar occasions, with high working temperature of 70 ℃.
	NLDJ	Black weather resistant linear low density polyethylene insulating material
	NMJ	Black weather resistant medium density polyethylene insulating material	For 10kV and below overhead cable or other similar occasions, * high working temperature of 70 ℃.
	NGJ	Black weather resistant HDPE insulation material

4 technical requirements and test methods

4.1 uniform appearance, smooth surface, no obvious impurities, no more than 3 particles are allowed.

4.2 the physical and mechanical properties, electrical properties and test methods shall meet the requirements of Table 2.

Table 2 physical and mechanical properties, electrical properties and test methods of PE materials

Serial number

project

NDH

LDH

NDJ

NLDJ

NMJ

NGJ

one

Melt flow mass rate / (g / 10min) ≤

two

zero point four

one

one point five

zero point four

two

Density / (g / cm) three )

≤0.940

0.940～0.955

0.955～0.978

≤0.940

0.940～0.955

0.955～0.978

three

Tensile strength / MPa

thirteen

fourteen

seventeen

twenty

thirteen

fourteen

seventeen

twenty

four

Tensile yield stress / MPa

sixteen

five

Tensile strain at break /%

five hundred

six hundred

six hundred and fifty

five hundred

six hundred

six hundred and fifty

six

Low temperature impact embrittlement temperature, - 76 ℃

adopt

seven

Resistance to environmental stress cracking f zero /h

ninety-six

five hundred

ninety-six

five hundred

eight

Oxidation induction period at 200 ℃ / min

thirty

－

nine

Carbon black content /%

2.60±0.25

－

ten

Carbon black dispersion / grade

three

－

eleven

Vicat softening point / ℃

－

one hundred and ten

－

one hundred and ten

twelve

Thermal aging of air oven

Tensile strength / MPa

－

thirteen

sixteen

twenty

twelve

thirteen

sixteen

twenty

Variation of tensile strain at break /%

－

five hundred

six hundred and fifty

four hundred

five hundred

six hundred and fifty

thirteen

Elongation at break at low temperature /%

－

one hundred and seventy-five

－

one hundred and seventy-five

fourteen

Artificial climate aging 0-1008h

Tensile strength / MPa

－

±25

Variation of tensile strain at break /%

－

±25

Artificial climate aging 504-1008h

Tensile strength / MPa

－

±15

Variation of tensile strain at break /%

－

±15

fifteen

Thermal stress cracking f zero /h

－

ninety-six

sixteen

Dielectric strength e d /(kV/mm)

twenty-five

thirty-five

seventeen

Volume resistivity Ρ v/Ω ˙ m

one × ten fourteen

eighteen

Dielectric constant ε r

two point eight zero

two point seven five

－

two point four five

nineteen

Dielectric loss factor Tan δ

－

zero point zero zero five

－

zero point zero zero one

5 inspection rules

5.1 inspection methods and requirements

5.1. 1. For materials produced by qualified suppliers, the performance of the products is stable (no quality problems occur within one year, and the products will be returned), and sampling inspection shall be conducted at intervals.

5.1. 2. Each batch of materials supplied by new manufacturers shall be inspected at random, and those that are qualified for five consecutive sampling shall be transferred to sampling inspection of alternate batches.

5.1. 3. If the materials of the designated manufacturer are inspected once, the unqualified materials shall be sampled and inspected according to the provisions of × ×.

5.1. 4. For each batch of materials, the quality guarantee certificate or test report of the supplier's materials shall be attached.

5.1. 5 sampling method

2 bags or more for each batch.

5.2 test items

5.2. The detectable items are density, tensile strength before aging, elongation at break before aging, volume resistivity at 20 ℃ and dielectric strength.

5.2. 2. For the performance that cannot be detected, the acceptance shall be based on the material test report or warranty, and the test shall be outsourced if necessary.

6 packing

PE material is packed with polyethylene plastic film bag inside and PP woven fabric / kraft paper composite bag externally. The net weight of each bag is 25 ± 0.2kg, but negative tolerance is not allowed per ton.

7 mark

On the packaging of PE materials, the manufacturer's name, material model and name, manufacturing date, net weight, product certificate and other marks shall be indicated.

8 annex

When PE material enters the factory, it shall be attached with the quality assurance certificate or quality inspection sheet of the material manufacturer. The type test report of legal inspection department shall be attached to the first supply. During normal supply, the type test report of legal inspection department shall be provided once every two years.

9 transportation

During transportation, PE materials should not be exposed to the sun and rain, and the packaging should not be damaged. Keep it clean, dry, free from pollution, and keep the package intact.

10 storage

PE materials should be stored in a clean, cool, dry and ventilated warehouse. The storage date is 12 months from the date of production.

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Technical specification for black polyethylene plastic for wire and cable