低氟析出宇航用交联乙烯-四氟乙烯共聚物绝缘电线电缆的研制与应用

Research and Application of Cross-Linked Ethylene-Tetrafluoroethylene Copolymer Insulated Wires and Cables with Low Fluoride Off-Gassing for Aerospace

普通宇航用交联乙烯-四氟乙烯共聚物绝缘电线、电缆(C55导线)存在氟析出量高的缺点,严重限制了其在航天器载人或密闭舱室中的应用。为有效降低空间站用导线的氟析出量,研究了低氟材料加工工艺,设计开发了具有低氟析出特点的宇航用交联乙烯-四氟乙烯共聚物绝缘电线电缆,并通过试验对其常规性能、极限性能、氟析出、寿命等性能进行了验证。结果表明,研制的具有低氟析出特点的C55/LF导线的常规性能指标、极限性能与普通C55产品相当。寿命评估试验表明样品有很宽的使用温度范围,能够满足航天器、空间站以及其他宇航设备上对线缆的寿命要求。通过在中国空间站的实际在轨运行验证表明,该导线满足设计目标要求。

Conventional cross-linked ethylene-tetrafluoroethylene copolymer insulated wires and cables,namely C55 wires,whose disadvantage of high fluoride off-gassing has limited their applications in aerospace manned cabin or other closed spaces.To achieve the aim of low fluoride off-gassing,the measure to decrease the amount of fluoride off-gassing was studied and a new type of C55 wires with low fluoride off-gassing was developed.Furthermore,the normal performances,extreme performances,the amount of fluoride off-gassing and service life were verified.The results confirmed the performances of C55/LF wires with low fluoride off-gassing were consistent with conventional C55 wires,in which the former could satisfy the requirements of cables for spacecraft and space station,confirmed by the actual in-orbit operation in China space station.