• PVC insulating materials for wire and cable

PVC insulating materials for wire and cable are a PVC-based pellet material which is produced by mixing and granulating with accessory ingredients such as plasticizers, fillers, stabilizers, lubricants and colorants.

1. Model, name and application of products

Model

Name

Application

J-70

Insulation-level soft PVC plastic at 70

Insulation for meter communication cable and wires at 0.6/1 kV or below

JR-70

Soft-insulation-level soft PVC plastic at 70

Insulation for soft wires and cables at 450/750V or below

JGD-70

High performance electrical-insulation-level soft PVC plastic at 70

Insulation for wires and cables at 3.6/6 KV or below

JKJ-70

PVC insulating overhead material at 70

Insulation for overhead insulating cables at 1 kV or below

J-90

Insulation-level soft PVC plastic at 90

Insulation for heat-resistant wires and cables at 450/750V or below

J-105

PVC insulation material at 105

Insulation for wires and cables at temperature classification of 105

2. Executive Standard

GB/T 8815-2008JB/T 10260-2014Q/WRD 001-2016

3. Products properties

The products properties are shown in Table 1.

4. Processing

Single screw extruder is used in processing, with the aspect ratio of screw L/D20. The recommended reference processing temperature is shown below:

Sections

Section 1

Section 2

Section 3

Section 4

Extrusion head

Die

Temperature/ 

140±10

160±10

170±5

175±5

175±10

170±10

5. Packaging, transportation and storage

Package: net weight of each bag (25±0.2) kg. The inner bag is polyethylene film and the outer bag is craft paper composites.

Transportation and storage: no exposure to sunshine and rain during transportation. It should be stored in clean, cool, dry and ventilated warehouse.

Table 1 Products properties

Test items

J-70

JR-70

JGD-70

JKJ-70

J-90

J-105

Tensile strength/MPa

Tensile strain at break/%

Thermal deformation

Impact brittle property

Test temperature /

Impact brittle property

Pass

Pass

Pass

Pass

Pass

Pass

Thermal stabilization time at 200/min  

volume resistivity at 20/Ω·m 

dielectric strength /MV/m)≥

dielectric loss factor(50Hz) 

volume resistivity at work temperature

Test temperature /

volume resistivity/Ω·m ≥

Thermal aging test temperature/

Thermal aging test time/h

Tensile strength after aging/MPa   

The biggest change rate of tensile strength/%

Tensile strain at break after aging/%  

The biggest change rate of tensile strain at break/%

Mass loss of thermal aging

Test temperature/

Test time/h

Mass loss/(g/cm2)

42 days after aging at artificial resistant weather

The change rate of tensile strength/%

The change rate of tensile strain at break/%

Comparison between 21 and 42 days after aging at artificial resistant weather

The change rate of tensile strength/%

The change rate of tensile strain at break/%