Dow ENDURANCE™ DHDA-7708 BK
LLDPE
陶氏化学(Dow Chemical)
产品描述
DOW ENDURANCE™ DHDA-7708 BK is a thermoplastic semiconductive compound specifically designed for jacketing over medium, high, and extra-high voltage power cables. It combines the excellent physical properties and low moisture vapor transmission normally associated with Dow insulating jacket materials with the conductivity of thermoplastic semiconductive insulation shielding compounds. In medium voltage cable applications, a semiconductive jacket provides cable endurance and prolongs cable life by reducing neutral-to-ground impulse voltage. The semiconductive jacket enables on-reel cable diagnostic analysis in high and extra-high voltage applications.
Compared to conventional thermoplastic semiconductive materials, DOW ENDURANCE™ DHDA-7708 BK offers:
Improved environmental stress-crack resistance
Improved low-temperature properties
Improved thermomechanical properties
Reduced adhesion to strippable insulation shields
Improved cut-through and abrasion resistance
Reduced moisture vapor transmission
Details are shown in Figures 1 to 4
Specifications
Cables jacketed with DOW ENDURANCE™ DHDA-7708 BK, prepared using sound commercial fabrication practice, would be expected to meet the following specifications:
AEIC: CS8, CS9
ICEA: S-94-649 Type 1, S-108-720 Type 1
IEC: 60502, 60840, 62067
基本信息
| 原厂资料 | 物性表-ASTM(英文) | |||
| 产品特性 | 半导体 | |||
| 颜色形状 | 黑色 | |||
| 成型方式 | 线缆挤出 | |||
技术参数
| 物理性能 | 值/单位 | 测试标准 | 测试条件 |
|---|---|---|---|
密度 | 0.98 g/cm³ | ASTM D 1505 | |
环境应力开裂(ESCR ) | 500 Hours | ASTM D 1693 | 10% Igepal, F0 |
| 机械性能 | 值/单位 | 测试标准 | 测试条件 |
拉伸强度 | |||
- | 11.7 Mpa | ASTM D 638 | |
拉伸延伸率 | |||
断裂(brk) | 450 % | ASTM D638 | |
拉伸模量 | 345 Mpa | ASTM D638 | |
| 冲击性能 | 值/单位 | 测试标准 | 测试条件 |
脆化温度 | -70 °C | ASTM D 746 | F50 |
脆化温度 | -50 °C | ASTM D 746 | Notched |
| 硬度性能 | 值/单位 | 测试标准 | 测试条件 |
邵氏硬度 D | 55 D | ASTM D 2240 | |
| 热学性能 | 值/单位 | 测试标准 | 测试条件 |
负载形变 | 1 % | ASTM D2632 | Heat Distortion (ICEA) (90°C) |
| 电学性能 | 值/单位 | 测试标准 | 测试条件 |
体积电阻率 | 2.5E+1 Ohm-cm | ASTM D 991 | 23°C |
体积电阻率 | 5E+1 Ohm-cm | ASTM D 991 | 90°C |
| 老化性能 | 值/单位 | 测试标准 | 测试条件 |
拉伸强度(热老化) | 75 % | ASTM D638 | 1 week, 100°C |
延伸率(热老化) | 75 % | ASTM D638 | 1 week, 100°C |
| 薄膜性能 | 值/单位 | 测试标准 | 测试条件 |
水蒸气渗透系数 | 1.5 g/m²/24 hr | ASTM F 1249 | 38°C, 90% RH |