公司信息及水印
牌号简介 About |
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DOW ENDURANCE™ DHDA-7708 BK是一种热塑性半导体化合物,专门设计用于中、高和超高压电力电缆的护套。它结合了良好的物理性能和低湿度蒸汽传输,通常与陶氏绝缘护套材料有关,具有热塑性半导体绝缘屏蔽化合物的导电性。在中压电缆应用中,半导体护套通过降低中性点对地冲击电压,提供电缆耐久性并延长电缆寿命。半导体护套能够在高电压和超高压应用中进行卷盘电缆诊断分析。与传统热塑性半导体材料相比,Dow Endurance DHDA-7708 BK提供:改进的环境应力,抗裂性能,改进的低温性能,改进的热机械性能,降低对可剥离绝缘屏蔽层的粘附性,改进的穿透性和耐磨性,降低了水蒸气透过率。如图1至图4所示,采用良好的商业制造实践制备的带Dow耐力DHDA-7708 BK护套的电缆应符合以下规范:AEIC:CS8,CS9 ICEA:S-94-649 1类,S-108-720 1类,IEC:60502,60840,62067 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 |
技术参数 Technical Data | |||
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物理性能 PHYSICAL |
额定值 Nominal Value |
单位 Units |
测试方法 Test Method |
密度 Density |
0.980 | g/cm³ | ASTM D1505 |
抗环境应力开裂 ESCR(Environmental Stress Cracking Resistance) |
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10%非离子洗涤剂,F0 10% non-ionic detergent, F0 |
> 500 | hr | ASTM D1693 |
薄膜 film |
额定值 Nominal Value |
单位 Units |
测试方法 Test Method |
水气透过率 Water vapor transmittance |
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38℃,90% RH 38℃,90% RH |
1.5 | g/m²/24 hr | ASTM F1249 |
老化性能 Aging performance |
额定值 Nominal Value |
单位 Units |
测试方法 Test Method |
拉伸强度保持率 Tensile strength retention rate |
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1 week,100℃ 1 week,100℃ |
75 | % | ASTM D638 |
伸长保持率 Elongation retention rate |
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热性能 THERMAL |
额定值 Nominal Value |
单位 Units |
测试方法 Test Method |
脆化温度 Embrittlement temperature |
ASTM D746 | ||
-- -- 2 |
-70.0 | ℃ | ASTM D746 |
-- -- 3 |
℃ | ASTM D746 | |
热变形温度 Hot deformation temperature 4 |
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ICEA,90℃ ICEA,90℃ 4 |
% | ASTM D2632 | |
电气性能 Electrical performance |
额定值 Nominal Value |
单位 Units |
测试方法 Test Method |
体积电阻率 Volume resistivity |
ASTM D991 | ||
23℃ 23℃ |
ohms·cm | ASTM D991 | |
90 ℃ 90 ℃ |
ohms·cm | ASTM D991 | |
机械性能 MECHANICAL |
额定值 Nominal Value |
单位 Units |
测试方法 Test Method |
邵氏硬度 Shore hardness |
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邵氏 D Shaw's D |
ASTM D2240 | ||
拉伸模量 Tensile modulus |
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正割 Secant |
MPa | ASTM D638 | |
拉伸强度 tensile strength |
MPa | ASTM D638 | |
拉伸应变 Tensile strain |
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断裂 fracture |
% | ASTM D638 |
备注 |
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1 一般属性:这些不能被视为规格。 |
2 F50 |
3 Notched |
4 plaque |
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