METHOD FOR PRODUCING WATER TREE-RESISTANT, TRXLPE-TYPE CABLE SHEATH
    2.
    发明申请
    METHOD FOR PRODUCING WATER TREE-RESISTANT, TRXLPE-TYPE CABLE SHEATH 有权
    生产耐水性TRXLPE型电缆护套的方法

    公开(公告)号:US20110094772A1

    公开(公告)日:2011-04-28

    申请号:US12993287

    申请日:2009-05-18

    IPC分类号: H01B3/00 H01B13/14 B29C47/02

    CPC分类号: H01B7/282 H01B13/148

    摘要: TRXLPE-type cable sheaths are prepared by a method in which a solid polymer is mixed with a liquid water tree-resistant agent either by dosing or direct injection. In the dosing method, the solid polymer, e.g., high pressure LDPE, is sprayed or otherwise contacted with the liquid agent, e.g., PEG, the agent is allowed to absorb into the polymer, and the polymer with absorbed agent is then fed to an extrusion apparatus for extrusion over a sheathed or unsheathed wire or optic fiber. In the direct injection method, the solid polymer is first fed to an extrusion apparatus, and the liquid agent is sprayed or otherwise contacted with the polymer before the two are blended with one another through the action of the mixing elements of the apparatus.

    摘要翻译: TRXLPE型电缆护套通过一种方法制备,其中固体聚合物通过定量给药或直接注射与液体耐水树胶混合。 在定量给料方法中,固体聚合物例如高压LDPE被喷射或以其它方式与液体试剂(例如PEG)接触,使试剂吸收到聚合物中,然后将具有吸收剂的聚合物进料到 用于在护套或未涂覆的线或光纤上挤出的挤出设备。 在直接注射方法中,首先将固体聚合物进料到挤出装置中,并且通过装置的混合元件的作用将液体剂彼此喷雾或以其它方式与聚合物接触。

    Method for testing a mechanical integrity of an insulating layer covering a conductor in a cable
    3.
    发明授权
    Method for testing a mechanical integrity of an insulating layer covering a conductor in a cable 有权
    用于测试覆盖电缆中的导体的绝缘层的机械完整性的方法

    公开(公告)号:US08601858B2

    公开(公告)日:2013-12-10

    申请号:US12735067

    申请日:2008-12-10

    IPC分类号: G01M3/26

    CPC分类号: G01M3/2838

    摘要: A method for testing a mechanical integrity of an insulating layer covering a conductor in a cable, a longitudinal void being defined inside the insulating layer in a region of the conductor. A first end of the insulating layer is blocked. A compressed gas is injected at a second end of the insulating layer so that the gas enters and travels the longitudinal void inside the insulating layer towards the first end. A gas pressure inside the insulating layer is measured at least near the second end. Injection of the compressed gas is stropped after a predetermined injection time period. A variation of the gas pressure inside the insulating layer is monitored during a diagnostic time window succeeding to a transitional time period following the stopping of the injection. Integrity of the insulating layer is determined based on the variation of the gas pressure during the diagnostic time window.

    摘要翻译: 一种用于测试覆盖电缆中导体的绝缘层的机械完整性的方法,纵向空隙限定在导体区域内的绝缘层的内部。 绝缘层的第一端被阻挡。 在绝缘层的第二端注入压缩气体,使得气体进入绝缘层内的纵向空隙并朝着第一端行进。 至少在第二端附近测量绝缘层内部的气体压力。 压缩气体的喷射在预定的喷射时间段之后停止。 在停止注射之后的过渡时间段之后的诊断时间窗口期间监测绝缘层内的气体压力的变化。 基于诊断时间窗口内的气体压力的变化来确定绝缘层的完整性。

    METHOD FOR TESTING A MECHANICAL INTEGRITY OF AN INSULATING LAYER COVERING A CONDUCTOR IN A CABLE
    4.
    发明申请
    METHOD FOR TESTING A MECHANICAL INTEGRITY OF AN INSULATING LAYER COVERING A CONDUCTOR IN A CABLE 有权
    用于测试覆盖电缆中的导体的绝缘层的机械完整性的方法

    公开(公告)号:US20110011163A1

    公开(公告)日:2011-01-20

    申请号:US12735067

    申请日:2008-12-10

    IPC分类号: G01M3/26

    CPC分类号: G01M3/2838

    摘要: A method for testing a mechanical integrity of an insulating layer covering a conductor in a cable, a longitudinal void being defined inside the insulating layer in a region of the conductor. A first end of the insulating layer is blocked. A compressed gas is injected at a second end of the insulating layer so that the gas enters and travels the longitudinal void inside the insulating layer towards the first end. A gas pressure inside the insulating layer is measured at least near the second end. Injection of the compressed gas is stropped after a predetermined injection time period. A variation of the gas pressure inside the insulating layer is monitored during a diagnostic time window succeeding to a transitional time period following the stopping of the injection. Integrity of the insulating layer is determined based on the variation of the gas pressure during the diagnostic time window.

    摘要翻译: 一种用于测试覆盖电缆中导体的绝缘层的机械完整性的方法,纵向空隙限定在导体区域内的绝缘层的内部。 绝缘层的第一端被阻挡。 在绝缘层的第二端注入压缩气体,使得气体进入绝缘层内的纵向空隙并朝着第一端行进。 至少在第二端附近测量绝缘层内部的气体压力。 压缩气体的喷射在预定的喷射时间段之后停止。 在停止注射之后的过渡时间段之后的诊断时间窗口期间监测绝缘层内的气体压力的变化。 基于诊断时间窗口内的气体压力的变化确定绝缘层的完整性。

    Water tree resistant cable
    5.
    发明授权
    Water tree resistant cable 有权
    防水电缆

    公开(公告)号:US06869995B2

    公开(公告)日:2005-03-22

    申请号:US10058977

    申请日:2002-01-28

    摘要: A composition comprising: (i) polyethylene, and, based on 100 parts by weight of component (i), (ii) about 0.3 to about 0.6 part by weight of 4,4′-thiobis(2-methyl-6-t-butylphenol); 4,4′-thiobis(2-t-butyl-5-methylphenol); 2,2′-thiobis(6-t-butyl-4-methylphenol); or a mixture of said compounds, and (iii) about 0.4 to about 1 part by weight of a polyethylene glycol having a molecular weight in the range of about 1000 to about 100,000.

    摘要翻译: 一种组合物,其包含:(i)聚乙烯,并且基于100重量份的组分(i),(ii)约0.3至约0.6重量份的4,4'-硫代双(2-甲基-6-叔 - 丁基苯酚); 4,4'-硫代双(2-叔丁基-5-甲基苯酚); 2,2'-硫代双(6-叔丁基-4-甲基苯酚); 或所述化合物的混合物,和(iii)约0.4至约1重量份的分子量在约1000至约100,000范围内的聚乙二醇。

    Process for crosslinking
    6.
    发明授权
    Process for crosslinking 失效
    交联方法

    公开(公告)号:US5346961A

    公开(公告)日:1994-09-13

    申请号:US43564

    申请日:1993-04-07

    IPC分类号: C08J3/24 C08F8/00 C08F255/02

    CPC分类号: C08F255/02 C08F2810/20

    摘要: A process for crosslinking comprising (a) introducing into a reactor, under crosslinking conditions, a mixture comprising(i) one or more polyolefins;(ii) organic peroxide;(iii) an ester, ether, or ketone containing two or more unsaturated groups; and(iv) a compound having the formula: ##STR1## wherein R=hydrogen, methyl, or ethyl; R.sup.1 =an alkylene having 1 to 6 carbon atoms;andR.sup.2 =an alkyl having 8 or more carbon atoms or Si(R.sup.3).sub.3 wherein R.sup.3 is hydrogen or alkoxy having 1 to 6 carbon atoms; each R.sup.3 is the same or different; and at least one R.sup.3 is an alkoxy,and (b) crosslinking the polyolefin(s).

    摘要翻译: 一种交联方法,包括(a)在交联条件下向反应器中引入包含(i)一种或多种聚烯烃的混合物; (ii)有机过氧化物; (iii)含有两个或更多个不饱和基团的酯,醚或酮; 和(iv)具有下式的化合物:其中R =氢,甲基或乙基; R1 =具有1至6个碳原子的亚烷基; 和R2 =具有8个或更多个碳原子的烷基或Si(R3)3,其中R3是氢或具有1至6个碳原子的烷氧基; 每个R3相同或不同; 并且至少一个R 3是烷氧基,和(b)交联聚烯烃。

    Method of Removing Impurities from Natural Ester, Oil-Based Dielectric Fluids
    7.
    发明申请
    Method of Removing Impurities from Natural Ester, Oil-Based Dielectric Fluids 审中-公开
    从天然酯,油基介质流体中去除杂质的方法

    公开(公告)号:US20130264527A1

    公开(公告)日:2013-10-10

    申请号:US13990922

    申请日:2011-11-08

    IPC分类号: H01B3/20

    CPC分类号: H01B3/20

    摘要: The method of manufacturing a natural ester, oil-based electrical insulation fluid by contacting refined, bleached, optionally winterized, and deodorized natural ester oil, e.g., soy oil, with an absorbent is improved by using as the absorbent a synthetic silicate absorbent comprising an alkali and/or alkaline earth metal, e.g., magnesium.

    摘要翻译: 通过将精制漂白的任选的冬季和除臭的天然酯油(例如大豆油)与吸收剂接触来制备天然酯,油基电绝缘液的方法通过使用合成硅酸盐吸收剂作为吸收剂而被改进,所述合成硅酸盐吸收剂包含 碱和/或碱土金属,例如镁。

    Low dielectric loss power cable sheaths comprising high pressure polyolefins free of silane functionality
    9.
    发明授权
    Low dielectric loss power cable sheaths comprising high pressure polyolefins free of silane functionality 有权
    低介电损耗电力电缆护套包括不含硅烷功能的高压聚烯烃

    公开(公告)号:US08329797B2

    公开(公告)日:2012-12-11

    申请号:US12668038

    申请日:2008-07-09

    IPC分类号: C08K5/05 C08K5/06

    摘要: Power cables that comprise a sheath layer, e.g., an insulation layer, are produced from a mixture of a high pressure polyolefin free of silane functionality, e.g., high pressure low density polyethylene, and a polyether polyol of which at least 50 percent of its molecules comprise no more than a single hydroxyl functionality. Preferably, the power cable is a medium or high voltage power cable, and the polyolefin is crosslinked as the sheath layer is fabricated and/or subsequent to the fabrication of the sheath layer.

    摘要翻译: 包括护层(例如绝缘层)的电力电缆由不含硅烷官能团的高压聚烯烃(例如高压低密度聚乙烯)和聚醚多元醇的混合物制成,所述聚醚多元醇的至少50%的分子 包含不超过单个羟基官能团。 优选地,电力电缆是中压或高压电力电缆,并且当制造护套层和/或在制造护套层之后,聚烯烃被交联。

    Process for extrusion
    10.
    发明授权
    Process for extrusion 失效
    挤出方法

    公开(公告)号:US5575965A

    公开(公告)日:1996-11-19

    申请号:US445140

    申请日:1995-05-19

    摘要: A process for the co-extrusion of an inner layer around a conductive medium and an outer layer around the inner layer including:(i) introducing into an extruder adapted for profile coextrusion, a preformed conductive medium; an inner layer formulation including a homogeneous polyethylene having a polydispersity in the range of about 1.5 to about 3.5 and an essentially uniform comonomer distribution, and an organic peroxide; and an outer layer formulation including (A) one of (a) a copolymer of ethylene and an unsaturated ester; (b) or a polyethylene having a polydispersity greater than about 4.0 and a density of at least 0.916 gram per cubic centimeter, said polymer made by a high pressure process; or (c) a heterogeneous copolymer of ethylene and one or more alpha-olefins having a density of less than 0.916 gram per cubic centimeter, a melt index of at least about 4 grams per 10 minutes, and a polydispersity greater than about 4.0, and, (B) optionally, an organic peroxide; and(ii) co-extruding said formulations around the conductive medium at a temperature no higher than about 160 degrees C.

    摘要翻译: 围绕导电介质和围绕内层的外层共挤出内层的方法,包括:(i)引入适于轮廓共挤出的挤出机中预成型的导电介质; 包含多分散性在约1.5至约3.5范围内且基本均匀的共聚单体分布的均匀聚乙烯和有机过氧化物的内层制剂; 和(A)(a)乙烯和不饱和酯的共聚物之一的外层制剂; (b)或多分散度大于约4.0且密度至少为0.916克/立方厘米的聚乙烯,所述聚合物通过高压法制备; 或(c)乙烯和一种或多种密度小于0.916克/立方厘米的α-烯烃的非均相共聚物,熔体指数为至少约4克/ 10分钟,多分散性大于约4.0,以及 ,(B)任选的有机过氧化物; 和(ii)在不高于约160℃的温度下将所述制剂在导电介质周围共挤出。