阻燃电子线缆的燃烧特性和产品设计

介绍了阻燃电子线缆国内外相关标准,探讨了阻燃电子线缆的特点、燃烧特性以及在产品结构设计、材料选择和应用中应注意的一些问题。提高阻燃特性的关键是选择合适的绝缘材料、护套材料和设计优良的防火屏,以满足阻燃电子线缆在特定使用环境中的要求。     

一种线缆护套的屏蔽效能测试方法

设计了一种基于串扰理论的线缆护套屏蔽效能的测试方法,根据测试结果分析了屏蔽护套不同接地方式对线缆间感性耦合、容性耦合的影响,试验结果可为在实际工程中抑制线缆串扰提供依据。     

塑料线缆挤管式模具的设计及选配

影响塑料线缆产品质量的因素很多,其中最重要的因素之一是挤出模具。介绍了塑料线缆挤出模具的主要形式,着重阐述了挤管式模具的设计参数选择,并以低烟无卤材料挤出护套的特殊实例,详细剖析了挤管式模具的参数选择。     

户外通信线缆防蚁护套的比较研究

概括了对地下通信线缆防蚁塑料护套的基本要求 ,比较了半硬聚氯乙烯护套、聚酰胺 (尼龙 )护套及Term igon特种聚烯烃共聚物护套三种物理防蚁护套的特点和可行性 ,并提出 Termigon护套将成为新一代防蚁护套的主流。     

户外通信线缆防蚁护套的比较研究

概括了对地下通信线缆防蚁塑料护套的基本要求，比较了半硬聚氯乙烯护套、聚酰胺（尼龙（护套及Ｔｅｒｍｉｇｏｎ特种聚烯烃共聚物护魇三种物理防蚁护套的特点和可行性。并提出Ｔｅｒｍｉｇｏｎ护套将成为新一代防蚁护套的主流。     

亨通线缆叠加式双65护套生产线成功投入生产

江苏亨通线缆科技有限公司数据缆事业部叠加式双65护套生产线于1月19日正式通过验收并成功投入生产。与原65护套生产线相比,叠加式双65护套生产线占地面积仅增加20%,人工成本可减少50%,但是产能却是原来的2倍。这次设备的改造对于公司的产品来说是一次质与量的飞跃,极大的提升了亨通线缆的生产效益。     

草甸土中线缆及材料土壤自然埋藏试验

采用在草甸土中进行线缆及材料土壤环境自然埋藏及定期测量土壤环境因素、土壤微生物的方法,研究其腐蚀变化规律及腐蚀原因。结果表明：各种线缆外护套性能保持较好;金属材料土壤腐蚀程度中等偏轻,金属平均腐蚀率随时间变化规律基本遵循方程式C=AT~B;成都草旬土中高含水量、低电阻率、可溶性盐及土壤微生物的活动造成金属的腐蚀。     

大港滨海盐土中线缆及材料埋藏试验研究

将线缆和材料在大港滨海盐土中进行土壤环境自然埋藏及定期测量土壤环境因素和土壤微生物,研究其腐蚀变化规律及腐蚀原因.结果表明：金属材料涂漆钢带腐蚀严重;铝腐蚀较重;铅土壤腐蚀较轻;涂塑钢丝及线缆外护套性能保持较好.该站土壤为滨海盐土,高pH值,高含水率,高含盐量及微生物活动强烈,造成金属的腐蚀.     

沈阳菜园型草甸土中线缆及材料埋藏试验研究

将线缆和材料在沈阳站菜园型草甸土中进行土壤环境自然埋藏及定期测量土壤环境因素和土壤微生物,研究其腐蚀变化规律及腐蚀原因。结果表明:金属材料铝腐蚀严重、穿孔;涂漆钢带腐蚀较重;铅土壤腐蚀较轻,线缆外护套性能保持较好。该站土壤为菜园型草甸土,土壤pH值6.9,呈中性,盐含量也较低,但是该站微生物活动强烈,造成金属的腐蚀。     

索尔维亮相第六届中国国际线缆及线材技术展览会面向亚洲电缆护套市场全新推出新型无卤阻燃复合材料

2014年9月24日，中国上海，国际领先的特种聚合物材料供应商——索尔维特种聚合物事业部进一步拓展了旗下复合材料产品线，正式推出Cogegum可交联无卤阻燃（HFFR）复合物的全新牌号Cogegum GFR380，该材料可应用于铁路、船舶、工业以及油气等行业的线缆护套工艺。全新的Cogegum GFR380与同类硅烷接枝无卤阻燃（HFFR）材料相比，具有更出色的柔韧性与非凡的阻燃特性，并将在第六届中国国际线缆及线材技术展览会（WireChina2014）上面向亚洲市场隆重推出。     

异型结构特种圆-扁电缆的研制

针对特殊使用场合电子设备中空间狭小、结构复杂的特点,研制了一种圆形结构与扁平带状结构一体化的异型电缆,其可满足特殊使用场合对电缆机械性能和电气可靠性较高的要求。该电缆选择了新型交联乙烯-四氟乙烯共聚物（X-ETFE）作为绝缘材料,甲基乙烯基硅橡胶作为护套材料,以确保电缆的整体柔软性和成型性。通过特殊设计的模具,采用高温模压工艺进行了该电缆的成型。     

光缆耐鼠咬能力评估方法研究

通过测量护套材料碎屑颗粒的体积,计算用于评估非金属材料耐鼠咬能力的标准化耐鼠咬指数,并介绍了根据鼠啃咬力大小的研究结果,采用合金材料制作的代表其平均啃咬能力的仿真鼠牙。使用仿真鼠牙,对常用的复合金属带进行了穿刺试验,以评估光缆耐鼠咬能力。     

PEBA作为柔性电缆护套材料的工艺探讨

介绍了热塑性弹性体PEBA材料,作为嵌段型共聚物的PA改性材料,除具有聚酰胺本身优异的机械性能和电气性能外,提高了材料的柔顺性、出众的低温抗冲击性能和优异的加工性能,将该种材料成功的运用在生产柔性电缆护套材料中,并对其加工工艺进行了探讨。     

Electromagnetic Modeling of the Jacket in Cable-in-Conduit Conductors

Most magnets designed for thermonuclear fusion experiments rely on the cable-in-conduit conductor technology. These cables are made of several hundreds or thousands of multifilamentary superconducting strands. The strands are refrigerated by a flow of liquid helium in forced convection through a conduit, usually made of aluminum or stainless steel. The complexity of the manufacturing techniques makes it very difficult to perform direct voltage measurements inside the jacket of these cables. Voltage taps are usually placed on the jacket outer surface, deriving relevant information about the inner cable electrical characteristics. In the present study, an electromagnetic model is presented that allows us to take into account the presence of the jacket and its interactions with the superconducting cable. Some unexpected qualitative behaviors of the voltage signals detected on the jacket, whose interpretation is currently under debate in the scientific community, are reproduced by the model.     

Development and testing of a fire-resistant optical cable

A new type of fire-resistant optical cable has been developed. It is based on the loose tube concept employing special mica and glass tape wrappings together with a new type of buffer jacket material to provide the desired properties. With this design, ordinary acrylate-coated fibers are used. The cable has the unique property that during fire it converts from a cable, which mostly consists of organic materials, to a ceramic loose-tube structure that gives the fiber sufficient protection to prevent damage during fire. The cable has been tested according to IEC 331 which specifies a 750°C flame exposure for 3 h, and passed that test with negligible loss increase even at temperatures up to 900°C.     

水线光缆

1 GYTA33产品说明:金属加强构件、松套层绞填充式、铝-聚乙烯粘接护套、单细圆钢丝铠装、聚乙烯外护层通信用室外光缆。产品说明:金尾加强构件、松套层绞填充式、铝-聚乙烯粘接护套、纵包皱纹钢带铠装、聚乙烯护层、双细圆钢丝铠装、聚乙烯外护套通倌用室外光缆。     

水线光缆

1GYTA33产品说明:金属加强构件、松套层绞填充式、铝-聚乙烯粘接护套、单细圆钢丝铠装、聚乙烯外护层通信用室外光缆。     

Propagation Along a Braided Coaxial Cable in a Circular Tunnel

The modes of propagation along a coaxial structure contained within a circular tunnel are considered. The primary objective is to develop an approximate impedance boundary condition at the outer surface of the shielded cable that can be used in previously developed formalisms for axial conductors in tunnels. It is assumed that the metal braid can be characterized by a surface-transfer impedance. We also account for the possibility that a Iossy film exists on the outer surface of the dielectric jacket of the cable.     

Hydraulic pressure dependence of optical loss in jacketed optical fibre

Hydraulic pressure dependence of fibre loss is examined for several jacket structures. It is found that a liquid-filled pipe structure exhibits small loss increase, 0.9 dB/km at a pressure of 500 kg/cm2, and is promising for use in a submarine optical cable     

Loss stability assurance against hydrogen for submarine opticalfiber cable

Hydrogen generation resulting from electrochemical reactions between cable metals and condensed water or moisture permeated through the cable jacket was studied. It was found that hydrogen generation increases exponentially as time elapses and tends to saturation after about one month. Partial pressure distribution along the cable of hydrogen generated in the immersed range of a damaged cable was analyzed by means of the diffusion equation and the optical loss increase was estimated. It was shown that a water-blocking resin effectively prevents water penetration and hydrogen diffusion along the cable