Thermoplastic Low Smoke Zero Halogen (LSZH) flame retardant cable material for power cable is a polyolefin-based pellet material which is produced by mixing, plasticizing and granulating with accessory ingredients such as special modifiers, non-toxic and non-halogen flame retardants, antioxidants and lubricants.
1. Model, name and application of products
|
MODEL |
GRADE |
name |
application |
|
WDZ-Y-H90 |
Cab-H90-1 |
Good-resistance to cracking thermoplastic LSZH flame retardant polyolefin cable material |
Sheath of power cable has the maximum temperature of conductor which is 90℃. Materials comply with EU RoHS directive |
|
Cab-H90-2 |
Good-resistance to cracking thermoplastic LSZH high flame retardant polyolefin cable material |
2、Executive Standard
GB/T 32129-2015
3、products properties
The properties of products are shown in Table 1.
4、Processing
general extruder is used in processing with the aspect ratio of Low compression ratio screw L/D≥20. A low compression ratio screw is recommended in order to benefit the extrusion of highly filled halogen flame retardant cable materials. The recommended reference processing temperature is shown below：
|
sections |
Section 1 |
Section 2 |
Section 3 |
Section 4 |
Extruder head |
die |
|
temperature /℃ |
120～130 |
130～145 |
145～150 |
145～150 |
145～150 |
145～150 |
5、Packaging, transportation and storage
Packaging：Net weight per bag（25±0.2）kg. The inner bag is aluminum plastic composites and the outer bag is polypropylene woven/polyethylene/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 sheet
|
Test items |
Cab-H90-1 |
Cab-H90-2 |
|
Tensile strength /MPa ≥ |
10.0 |
10.0 |
|
Breaking elongation /% ≥ |
160 |
160 |
|
Air oven heat aging |
（110±2）℃×240 h |
（110±2）℃×240 h |
|
change rate of tensile strength/% ≤ |
±25 |
±25 |
|
change rate of Breaking elongation /% ≤ |
±25 |
±25 |
|
thermal distortion（（90±2）℃）/% ≤ |
50 |
50 |
|
volume resistivity at 20 ℃/Ω·m ≥ |
1.0×1010 |
1.0×1010 |
|
dielectric strength /（MV/m） ≥ |
18 |
18 |
|
thermal shock test |
test condition |
（130±3）℃×1 h |
|
Test result |
No cracking |
No cracking |
|
Impact brittle temperature |
Test temperature/℃ ≤ |
-25 |
-25 |
|
Test result/ Number of failures ≤ |
15/30 |
15/30 |
|
Ozone-resistance Test |
test condition |
（25±2）℃ × 24h×（250～300）ppm |
|
Test result |
No cracking |
No cracking |
|
Hot water immersion test |
test condition |
（70±2）℃×168h |
|
change rate of tensile strength /% ≤ |
±30 |
±30 |
|
change rate of tensile strength /% ≤ |
±35 |
±35 |
|
oxygen index /% ≥ |
30 |
34 |
|
smoke density |
flameless ≤ |
350 |
350 |
|
flame ≤ |
100 |
100 |
|
Acidity of combustion gas release |
Content of HCL and HBr /% ≤ |
0.5 |
0.5 |
|
HF/% ≤ |
0.1 |
0.1 |
|
pH ≥ |
4.3 |
4.3 |
|
electrical conductivity /（μS/mm ） ≤ |
10 |
10 |
|
toxic hazards of material-produced tobacco |
Negotiating by supply and demand sides according to product applications demand. |