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低压 绝缘
Low Voltage |
中高压绝缘
Medium/High Voltage |
填充料
Cable Filling |
护套
Cable Jackets |
性能要求
Requirements |
•拉伸强度 5-7 Mpa
Tensile Strength 5-7 Mpa
•老化 100ºC~135ºC
Aging 100ºC~135ºC |
•绝缘性能
Insulation
•分散非常重要
Dispersion is important
(否则会形成电流通道，在电流的作用下也会形成微裂纹) |
•几乎没有物理性能的要求
No real mechanical properties required |
•保护作用
To protect insulation from service conditions, environment, weathering
• 耐磨、耐油、阻燃等
Abrasion, flame and oil resistance can be require |
|
EPDM |
•中等门尼，高乙烯
Medium Mooney, High C2 |
•低门尼高乙烯
Low Mooney, High C2 |
•高乙烯
To get some green strength, high C2 grades |
•高门尼
High molecular weight grades being used |
配方
Compounding |
•总份数：260-450 phr
A total of 260-450 phr
• 煅烧陶土为主要填料, 通常经过偶联剂处理
•石蜡油，LDPE
Paraffinic wax and LDPE
• 过氧化物硫化
Peroxide cure |
•高含胶率
Very polymer rich recipes required
•石蜡，LDPE
Paraffinic wax and LDPE
•铅盐
Lead salts are often used as wet electrical stabilizers but environmental pressure to move away |
•总份数500 - 1500 phr
A total of 260-450 phr
• EPDM只是填料的载体
EPDM is basically a carrier for the mineral filler constituent. |
• 中等填充量
Medium filling
•与EVM并用改善阻燃性能
Blending with EVM to improve flame resistance
•其他胶种 EVM, CR, NBR
Or use of other rubbers like EVM, CR, NBR |
