CN109448897A - 抗弯曲疲劳同轴电缆及其生产工艺 - Google Patents
抗弯曲疲劳同轴电缆及其生产工艺 Download PDFInfo
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Abstract
本发明公开了一种抗弯曲疲劳同轴电缆，包括由内至外依次设置的导体、绝缘层、外部导体层、遮蔽体层、内部耐高温不变形材料层、外被体层及外部耐高温不变形材料层；所述内部耐高温不变形材料层及外部耐高温不变形材料层所用材质为牌号为150CA20的聚醚醚酮本发明还公开了其生产工艺，本发明通过外被体层内外耐高温不变形材料层的设置，加强了同轴电缆其抗弯曲的性能，甚至在内外耐高温不变形材料层的端部通过与耐高温不变形材料层相同材质的连接杆加强整体的抗弯曲性能；采用环氧大豆油提高了外被体层的稳定性，外被体层的配比增加了同轴电缆的抗疲劳性能。
Description
技术领域
本发明涉及一种抗弯曲疲劳同轴电缆及其生产工艺。
背景技术
同轴电缆其表面的塑料层通过挤塑与内部导线结合，塑料包覆导线以形成最后的产品，电缆表面的塑料层通过螺杆挤塑而成，螺杆一般分：输送段、熔融段、混炼段、排气段、均化段5个段。输送段用于输送物料，防止溢料。熔融段通过热传递和摩擦剪切，使物料充分熔融和均化。混炼段，使物料组分尺寸进一步细化与均匀，形成理想的结构，具分布性与分散性混合功能。排气段用来排出水汽、低分子量物质等杂质。均化(计量)段，输送和增压，建立一定压力，使模口处物料有一定的致密度，同时进一步混合，最终达到顺利挤出造粒的目的。目前同轴电缆其外被体层的抗弯曲性能不够好，抗疲劳性不佳。
发明内容
本发明的目的在于，克服现有技术中存在的缺陷，提供一种抗弯曲疲劳同轴电缆及其生产工艺，加强了同轴电缆其抗弯曲的性能，提高了外被体层的稳定性，增加了同轴电缆的抗疲劳性能。
为实现上述目的，本发明的技术方案是设计一种抗弯曲疲劳同轴电缆及其生产工艺，抗弯曲疲劳同轴电缆包括由内至外依次设置的导体、绝缘层、外部导体层、遮蔽体层、内部耐高温不变形材料层、外被体层及外部耐高温不变形材料层；所述内部耐高温不变形材料层及外部耐高温不变形材料层所用材质为牌号为150CA20的聚醚醚酮。通过外被体层内外耐高温不变形材料层的设置，加强了同轴电缆其抗弯曲的性能，甚至在内外耐高温不变形材料层的端部通过与耐高温不变形材料层相同材质的连接杆加强整体的抗弯曲性能。
进一步的技术方案是，导体为镀锡合金，导体由七根合金丝线绞合而成，每根合金丝线的直径为0.025mm；所述绝缘层材料为可熔性聚四氟乙烯；所述外部导体层为缠绕在绝缘层外的镀锡合金；所述遮蔽体层为绕包在外部导体层的铜包带。
进一步的技术方案是，外被体层由100重量份的聚对苯二甲酸乙二醇酯、8～12重量份的环氧大豆油、2～6重量份的十溴二苯乙烷、8～10重量份的三氧化二锑、15～20重量份的氢氧化镁、8～10重量份的阻燃粉体、1～2重量份的润滑剂、2～3重量份的钙锌复合稳定剂。采用非吸湿的环氧大豆油可以起到辅助稳定剂的作用，特别是与钙锌复合稳定剂配合使用，可有效提高热稳定性。从而可以在保证材料稳定性的同时，减低钙锌复合稳定剂的份量，提高材料的抗吸湿性和稳定性。三氧化二锑的加入增加了同轴电缆外被体层的阻燃性能，三氧化二锑蒸气稀释可燃性气体。氢氧化镁及阻燃粉体对成壳性和持久性有增效作用。
生产所述抗弯曲疲劳同轴电缆的工艺，包括如下步骤：
S1：将所述导体通入绝缘层挤出机，在导体外包覆挤出的绝缘层形成半成品；
S2：将前述半成品及作为外部导体层的镀锡合金带经过设置在放线架与外护套挤出机之间的镀锡合金带纵包装置以形成缠绕在绝缘层外的镀锡合金；
S3：将S2步骤形成的半成品进入护套机的护套挤出模具，依次挤包所述内部耐高温不变形材料层、外被体层及外部耐高温不变形材料层，从而形成所述同轴电缆。
进一步的技术方案是，外被体层的挤出工序为通过塑料进料装置将外被体层原料送入加热装置中加热熔融再通过气泵中的高压气体压喷到挤出机中，挤出机的温度250℃、挤出速度70m/min；外被体层厚度为0.1mm；可溶性聚四氟乙烯为粒径3mm的圆形片状。在内部耐高温不变形材料层及外部耐高温不变形材料层端部设置防变形卡口件，在内层耐高温不变形材料层和外层耐高温不变形材料层之间一体设置径向的防变形柱，防变形柱连接内层耐高温不变形材料层和外层耐高温不变形材料层，相邻防变形柱设置成三角形布置。在端部设置防变形卡口件，加强了整个电缆的抗弯曲、防变形能力，并且一体设置采用与内层耐高温不变形材料层材质相同的材质制成的防变形柱，从径向加强整个电缆的抗弯曲、防变形能力，大大加强了本电缆抗弯曲抗疲劳的性能。
本发明的优点和有益效果在于：通过外被体层内外耐高温不变形材料层的设置，加强了同轴电缆其抗弯曲的性能，甚至在内外耐高温不变形材料层的端部通过与耐高温不变形材料层相同材质的连接杆加强整体的抗弯曲性能；采用环氧大豆油提高了外被体层的稳定性，外被体层的配比增加了同轴电缆的抗疲劳性能。采用非吸湿的环氧大豆油可以起到辅助稳定剂的作用，特别是与钙锌复合稳定剂配合使用，可有效提高热稳定性。从而可以在保证材料稳定性的同时，减低钙锌复合稳定剂的份量，提高材料的抗吸湿性和稳定性。三氧化二锑的加入增加了同轴电缆外被体层的阻燃性能，三氧化二锑蒸气稀释可燃性气体。氢氧化镁及阻燃粉体对成壳性和持久性有增效作用。通过材料及结构两方面同时进行技术改进，增强了同轴电缆的抗弯曲抗疲劳的性能。
附图说明
图1是本发明一种抗弯曲疲劳同轴电缆实施例一的示意图；
图2是图1增加防变形卡口件、防变形柱后的示意图；
图3是内部耐高温不变形材料层、外部耐高温不变形材料层部分的立体图。
图中：1、导体；2、绝缘层；3、外部导体层；4、遮蔽体层；5、内部耐高温不变形材料层；6、外被体层；7、外部耐高温不变形材料层；8、防变形卡口件；9、防变形柱。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
实施例一：
如图1、图2、图3所示(为便于图示，图1未示出防变形卡口件、防变形柱)，本发明是一种抗弯曲疲劳同轴电缆及其生产工艺，抗弯曲疲劳同轴电缆包括由内至外依次设置的导体1、绝缘层2、外部导体层3、遮蔽体层4、内部耐高温不变形材料层5、外被体层6及外部耐高温不变形材料层7；所述内部耐高温不变形材料层5及外部耐高温不变形材料层7所用材质为牌号为150CA20的聚醚醚酮。导体1为镀锡合金，导体1由七根合金丝线绞合而成，每根合金丝线的直径为0.025mm；所述绝缘层2材料为可熔性聚四氟乙烯；所述外部导体层3为缠绕在绝缘层2外的镀锡合金；所述遮蔽体层4为绕包在外部导体层3的铜包带。外被体层6由100重量份的聚对苯二甲酸乙二醇酯、8重量份的环氧大豆油、2重量份的十溴二苯乙烷、8重量份的三氧化二锑、15重量份的氢氧化镁、8重量份的阻燃粉体、1重量份的润滑剂、2重量份的钙锌复合稳定剂。
生产所述抗弯曲疲劳同轴电缆的工艺，包括如下步骤：
S1：将所述导体1通入绝缘层2挤出机，在导体1外包覆挤出的绝缘层2形成半成品；
S2：将前述半成品及作为外部导体层3的镀锡合金带经过设置在放线架与外护套挤出机之间的镀锡合金带纵包装置以形成缠绕在绝缘层2外的镀锡合金；
S3：将S2步骤形成的半成品进入护套机的护套挤出模具，依次挤包所述内部耐高温不变形材料层5、外被体层6及外部耐高温不变形材料层7，从而形成所述同轴电缆。外被体层6的挤出工序为通过塑料进料装置将外被体层6原料送入加热装置中加热熔融再通过气泵中的高压气体压喷到挤出机中，挤出机的温度250℃、挤出速度70m/min；外被体层6厚度为0.1mm；可溶性聚四氟乙烯为粒径3mm的圆形片状。在内部耐高温不变形材料层5及外部耐高温不变形材料层7端部设置防变形卡口件8，在内层耐高温不变形材料层5和外层耐高温不变形材料层7之间一体设置径向的防变形柱9，防变形柱9连接内层耐高温不变形材料层5和外层耐高温不变形材料层7，相邻防变形柱9设置成三角形布置。
实施例二：
与实施例一的不同在于，外被体层由100重量份的聚对苯二甲酸乙二醇酯、12重量份的环氧大豆油、6重量份的十溴二苯乙烷、10重量份的三氧化二锑、20重量份的氢氧化镁、10重量份的阻燃粉体、2重量份的润滑剂、3重量份的钙锌复合稳定剂。
实施例三：
与实施例一的不同在于，外被体层由100重量份的聚对苯二甲酸乙二醇酯、10重量份的环氧大豆油、4重量份的十溴二苯乙烷、9重量份的三氧化二锑、17重量份的氢氧化镁、9重量份的阻燃粉体、1.5重量份的润滑剂、2.5重量份的钙锌复合稳定剂。
对比例一：
与实施例一的不同在于，抗弯曲疲劳同轴电缆包括由内至外依次设置的导体、绝缘层、外部导体层、遮蔽体层、及外被体层；外被体层其材质为聚对苯二甲酸乙二醇酯。
对比例二：
抗弯曲疲劳同轴电缆的外被体层，其按重量百分比包括有如下组份：聚氯乙烯粉46份，碳酸钙24份，钙锌安定剂2.5份，三氧化二锑2.0份，聚乙烯蜡0.5份，邻苯二甲酸二异壬酯9.0份，邻苯二甲酸二癸酯15.0份，大豆油1.0份。
各实施例及对比例的测试数据如下表：
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
Claims (5)
1.抗弯曲疲劳同轴电缆，其特征在于，包括由内至外依次设置的导体、绝缘层、外部导体层、遮蔽体层、内部耐高温不变形材料层、外被体层及外部耐高温不变形材料层；所述内部耐高温不变形材料层及外部耐高温不变形材料层所用材质为牌号为150CA20的聚醚醚酮。
2.根据权利要求1所述的抗弯曲疲劳同轴电缆，其特征在于，所述导体为镀锡合金，导体由七根合金丝线绞合而成，每根合金丝线的直径为0.025mm；所述绝缘层材料为可熔性聚四氟乙烯；所述外部导体层为缠绕在绝缘层外的镀锡合金；所述遮蔽体层为绕包在外部导体层的铜包带。
3.根据权利要求2所述的抗弯曲疲劳同轴电缆，其特征在于，所述外被体层由100重量份的聚对苯二甲酸乙二醇酯、8～12重量份的环氧大豆油、2～6重量份的十溴二苯乙烷、8～10重量份的三氧化二锑、15～20重量份的氢氧化镁、8～10重量份的阻燃粉体、1～2重量份的润滑剂、2～3重量份的钙锌复合稳定剂。
4.生产如权利要求1至3中任一项所述抗弯曲疲劳同轴电缆的工艺，其特征在于，包括如下步骤：
S1：将所述导体通入绝缘层挤出机，在导体外包覆挤出的绝缘层形成半成品；
S2：将前述半成品及作为外部导体层的镀锡合金带经过设置在放线架与外护套挤出机之间的镀锡合金带纵包装置以形成缠绕在绝缘层外的镀锡合金；
S3：将S2步骤形成的半成品进入护套机的护套挤出模具，依次挤包所述内部耐高温不变形材料层、外被体层及外部耐高温不变形材料层，从而形成所述同轴电缆。
5.根据权利要求4所述的抗弯曲疲劳同轴电缆的生产工艺，其特征在于，所述外被体层的挤出工序为通过塑料进料装置将外被体层原料送入加热装置中加热熔融再通过气泵中的高压气体压喷到挤出机中，挤出机的温度250℃、挤出速度70m/min；外被体层厚度为0.1mm；可溶性聚四氟乙烯为粒径3mm的圆形片状。
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