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70°C PVC fire-resisting material
70°C PVC fire-resisting material is made of PVC resin, with plasticizers, stabilizers, colorants and special additives. It is a granular material.
Standard:
J-70 of GB/T8815-2008, PVC/C of GB5230-1997 , PVC/A of GB12706
Features and uses:
Good mechanical and physical Performance, good Electrical Performance and extrusion processing Performance, suitable for sheathing material of wire and cable with temperature resistance to 70°C.
Performance:
Please see Form one.
Extrusion process:1, suitable for common PVC extruder, length-to-diameter factor of screw L / D ≥ 20; taking φ60 machine as example: 3 layers of filter net, 80 mesh/120 mesh/ 80 mesh, melt temperature < 180 ° C.
Processing temperature:
| Zone one |
Zone two |
Zone three |
Zone four |
Bolt head and mould |
140±10 |
160±10 |
170±5 |
175±5 |
175±10 |
Packaging, transportation and storage:
Packing: 25 kg per bag, polyethylene film bag lined kraft composite bag .
Transportation and storage: Kept in clean, cool, dry and ventilating place, avoid insolation and rain.
Form one
Item |
Unit |
Index name |
Typical value |
Density (upon your demands) |
g/cm3 |
- |
1.40-1.50 |
Tensile strength |
Mpa |
≥15.0 |
22.3 |
Elongation at break |
% |
≥150 |
320 |
Thermal aging in air box
(100°C×168 h) |
Tensile strength after ageing |
Mpa |
≥15.0 |
22.5 |
Rate of change of Tensile strength |
% |
MAX ±20 |
+12 |
Elongation at break after ageing |
% |
≥180 |
290 |
Rate of change of Elongation at break |
% |
MAX ±20 |
-10 |
Mass loss |
g/m2 |
≤23 |
19 |
Hot deformation |
% |
≤50 |
28 |
Thermal stability time under 200 ° C |
min |
≥50 |
90 |
Brittleness temperature on Low-temperature impact |
°C |
-25 Passed |
-25 |
Volume resistivity of 20 ° C |
W·m |
≥1.0×108 |
2.0×1011 |
Dielectric strength |
MV/m |
≥18 |
25 |
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