公开(公告)号：US5536777A

公开(公告)日：1996-07-16

申请号：US202098

申请日：1994-02-25

申请人： Izumi Ishikawa ,  Hiroyuki Miyata ,  Thoru Nakatsuka ,  Kazuhiko Goto ,  Kenji Matsui ,  Shiro Nakayama ,  Tohru Takahashi ,  Mitutaka Tanida ,  Toshio Niwa

发明人： Izumi Ishikawa ,  Hiroyuki Miyata ,  Thoru Nakatsuka ,  Kazuhiko Goto ,  Kenji Matsui ,  Shiro Nakayama ,  Tohru Takahashi ,  Mitutaka Tanida ,  Toshio Niwa

IPC分类号： C08K5/14 ,  H01B3/44 ,  C08K3/00

CPC分类号： H01B3/441 ,  C08K5/14

摘要： A polyethylene composition which is useful in insulations and joints of extra-high voltage power cables, and in which a cross-linking agent, comprising an organic peroxide subjected to purification processing, and an antioxidant, are blended, wherein the cross-linked composition has a dielectric loss tangent (tan.delta.) of less than or equal to 0.07% at a temperature of 90.degree. C. and under an electric field stress of 20 kV/mm. This polyethylene composition exhibits little dielectric loss, even at high temperatures or high electric field stresses, and is optimally employed in insulations and joints for extra-high voltage power cables of 275 kV or more.

摘要翻译： 可用于超高压电力电缆的绝缘和接头中的聚乙烯组合物，其中包含经过净化处理的有机过氧化物和抗氧化剂的交联剂，其中交联组合物具有 在90℃的温度和20kV / mm的电场应力下的介电损耗角正切（tanδ）小于或等于0.07％。 该聚乙烯组合物即使在高温或高电场应力下也显示出很小的介电损耗，并且最佳地用于275kV或更高的超高压电力电缆的绝缘和接头中。