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Application
| Name | Item | Use |
|---|---|---|
| 125 degree irradiated crosslinked heat shrinkable sleeve low smoke halogen-free material | YHS620-TG-WP1 | Medium, thin, large tube and busbar Tube |
| 125 Degree Irradiation Crosslinked Heat Shrinkable Tubing Low Smoke and Low Halogen | YHS620-TG-WP2 | Medium, thin, large tube and busbar tube |
Technical Specifications
Typical physical property data, subject to batch test reports.
| Test project | Units | YHS620-TG-WP1 | YHS620-TG-WP2 |
|---|---|---|---|
| Density | g/cm3 | 1.30 | 1.19 |
| Original tensile strength (after irradiation) | MPa | 12.0 | 13.0 |
| Original elongation at break (after irradiation) | % | 450 | 180 |
| Thermal aging of air after irradiation | ℃×h | 158×168 | 158×168 |
| Change rate of tensile strength | % | +8 | +7 |
| Change rate of elongation at break | % | -10 | -11 |
| Hot elongation test | 200℃×15min×0.2MPa | 200℃×15min×0.2MPa | |
| Elongation under load | % | 60 | 60 |
| Permanent deformation | % | 0.5 | 0.5 |
| Shrink temperature | ℃ | 105-140 | 105-140 |
| Gel content | % | 62 | 63 |
| Low temperature impact embrittlement | ℃ | -40 pass | -40 pass |
| 20℃ volume resistivity | Ω.cm | 5.0×10¹⁴ | 4.0×10¹⁴ |
| 20℃ dielectric strength | MV/m | 28 | 28 |
| Oxygen Index | % | 30 | 28 |
| Halogen acid content | mg/g | 0 | 0 |
| pH value | 6.1 | 6.2 | |
| Conductivity | μs/m | 0.6 | 0.5 |
| Toxicity index | 2.0 | 1.5 |
Extrusion Process
When the storage environment is relatively humid, or the production surface quality is high, the pellets can be dried in a hot air hopper at 70°C for 1 to 2 hours.
It is recommended to use a low compression ratio screw extrusion with a compression ratio of 1.2 ~ 2.0: 1. The screw should be cleaned before extrusion to ensure the cleanliness of the product. It is recommended to use 80 mesh or 100 mesh filter to avoid impurities in the extrusion process, while ensuring the melt pressure to obtain a good appearance and material compactness. Because the difference between the actual temperature of the melt and the value indicated by the temperature control meter varies with the type of extruder, users are requested to choose the appropriate temperature according to the specific situation of the extruder used. The following temperatures can be used as a reference for commissioning:
| Position | Cylinder I | Cylinder Ⅱ | Cylinder Ⅲ | Cylinder Ⅳ | Cylinder Ⅴ | Head and mold |
|---|---|---|---|---|---|---|
| Temperature | 120±5 | 140±5 | 150±5 | 155±5 | 155±5 | 160±5 |