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High electrical (weather resistant) polyethylene sheath

Description of products
本产品是以聚乙烯树脂为主要原材料加入炭黑、润滑剂等助剂,经混炼、塑化、造粒制得的高电性(耐候) 聚乙烯电缆护套料。本材料具有优良的电性能,耐低温及resistance to environmental stress cracking性能,适用于110kV及以上级电 力电缆的外护层。

Technical indicators

Item名称

KJPE-GDX810

Densityg/cm3

0.930-0.980

tensile strength≥MPa

20.0

elongation at break≥%

600

low temperature impact embrittlement temperature-76°C

通过

20°C时volume resistivityΩ.m≥

1.9*10“

dielectric strength≥MV/m

26

dielectric constant≤

2.75

dielectric loss factor≤

0.004

老化后

test temperature°C

110±2

试验时间h

240

tensile strength≥

15.0

tensile strain at break ≥

500

carbon black content% (仅针对黑色护套)

2.5±0.5

dispersion grade of carbon black≤(仅针对黑色护套)

3

200°C oxidation induction time(OIT) min≥

30

solution flow rate g/10min≤

1.0

vicat softening point°C≥

110

resistance to environmental stress crackingFo/h≥

500

耐磨实验次≥

20000

耐artificial weathering aging

老化42天后

 

tensile strength gradient≤

±30

elongation at break gradient≤

±30

42天后与21天比较

 

tensile strength gradient≤

±15

elongation at break gradient≤

±15

加工工艺
本产品挤出工艺温度为机身160~200°C,机头200~220°C。具体温度应根据挤出机参数进行调整和优化, 但熔体温度应保持在190°C以上。

Packaging and storage
高电性(耐候)聚乙烯电缆护套料内袋用聚乙烯薄膜袋,夕卜袋用编织袋。本公司普遍采用 0kg/袋大包装, 也可根据需要采用25kg/袋包装或其他形式包装。本产品应贮存在清洁,阴凉,干燥,通风的库房内,贮存 期自上产日期起为半年。

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