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    • 5. 发明公开
    • ENERGY CABLE HAVING A COLD-STRIPPABLE SEMICONDUCTIVE LAYER
    • 能量电缆具有可冷可拉伸的半导体层
    • EP3234013A1
    • 2017-10-25
    • EP14824542.6
    • 2014-12-17
    • Prysmian S.p.A.
    • CAIMI, LuigiCRISCI, VincenzoBAREGGI, Alberto
    • C08L31/04
    • H01B7/02B29C47/0016B29C47/02B29C47/065B29K2023/06B29K2023/12B29L2031/3462C08L23/08C08L23/0815C08L23/0853C08L23/10C08L23/16C08L2203/20C08L2203/202C08L2205/025C08L2205/03C08L2205/035C08L2207/02H01B3/20H01B3/441H01B3/447
    • Energy cable comprising, from the interior to the exterior, an electrical conductor, an inner semiconductive layer, an electrically insulating layer made from a thermoplastic material in admixture with a dielectric fluid, and an outer semiconductive layer, wherein the outer semiconductive layer comprises: (i) from 55 wt % to 90 wt % of a copolymer of ethylene with at least one ester comonomer having an ethylenic unsaturation; (ii) from 10 wt % to 45 wt % of a propylene copolymer with at least one olefin comonomer selected from ethylene and an α-olefin other than propylene, said copolymer having a melting point of from 145° C. to 170° C. and a melting enthalpy of from 40 J/g to 80 J/g; (iii) at least one conductive filler; (iv) at least one dielectric fluid; the amounts of (i) and (ii) being expressed with respect to the total weight of the polymeric components of the layer. The outer semiconductive layer is cold-strippable, having an adhesion with the underlying thermoplastic insulating layer which can be tuned so as to obtain a suitable balance between strippability at a temperature ranging from about 0° C. to about 40° C., without applying heat, and stable adhesion with the insulating layer during the cable lifespan.
    • 能量电缆从内部到外部包括电导体,内半导体层,由与介电流体混合的热塑性材料制成的电绝缘层,以及外半导体层,其中外半导体层包括:( i)55重量%至90重量%的乙烯与至少一种具有烯属不饱和度的酯共聚单体的共聚物; (ii)10重量%至45重量%的丙烯共聚物与至少一种选自乙烯和除丙烯以外的α-烯烃的烯烃共聚单体,所述共聚物具有145℃至170℃的熔点和 熔化焓为40J / g至80J / g; (iii)至少一种导电填料; (iv)至少一种介电流体; (i)和(ii)的量相对于层的聚合物组分的总重量表示。 外半导体层是可以冷剥离的,与下面的热塑性绝缘层具有粘合性,该热塑性绝缘层可以被调整,以便在约0℃至约40℃的温度范围内的可剥离性之间获得适当的平衡, 并且在电缆寿命期间与绝缘层的稳定粘合。