CN116453750A - 环保型轻质化差分信号多芯屏蔽电缆 - Google Patents
环保型轻质化差分信号多芯屏蔽电缆 Download PDFInfo
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Abstract
本发明公开了一种环保型轻质化差分信号多芯屏蔽电缆，包括两个椭圆形差分信号线芯绞合形成中心线芯体，中心线芯体外部包覆有聚酯纤维平织布内绕包层，若干所述差分信号线芯围绕聚酯纤维平织布内绕包层外部共同绞合形成缆芯，缆芯外部依次包覆有聚酯纤维平织布外绕包层、PPS导电纤维屏蔽层和硅烷接枝交联高密度聚乙烯外护套，差分信号线芯包括并排间隔布置的两个内导体且共同包覆在硅烷接枝交联低密度聚乙烯内绝缘层内，内导体外表面包覆有耐热隔离层，硅烷接枝交联低密度聚乙烯内绝缘层外部包覆有尼龙树脂绕包层。该电缆符合环保电缆要求，基于轻质轻量化制备所需，耐热性能优异，保证差分信号传输速率和信号传输稳定性。
Description
技术领域
本发明涉及电缆技术领域，特别是涉及一种环保型轻质化差分信号多芯屏蔽电缆。
背景技术
屏蔽电缆用于高速数据传输应用，通过屏蔽电缆路的电信号可以比通过非屏蔽电缆路由的电信号向外部环境辐射更少的EMI/RFI。通过屏蔽电缆传输的电信号可以比通过非屏蔽电缆的信号被更好地保护免受环境EMI/RFI的干扰。屏蔽电缆的信号导体通常成对布置，以传递差分信号。然而，普通的差分信号电缆通常采用发泡树脂绝缘层，比如发泡聚乙烯、发泡氟树脂绝缘层等，在导体发热时，容易造成绝缘层变形、劣化，绝缘性能变差，传送特性不稳定，大大影响电缆的电气特性，耐用性差。并且，目前在无卤低烟阻燃环保型的电线电缆日益推广应用趋势下，兼顾轻质轻量化电缆设计所需，重点研发环保型差分信号电缆是当前的主要课题之一。
发明内容
本发明针对现有技术的不足，所要解决的技术问题是提供一种环保型轻质化差分信号多芯屏蔽电缆，采用无卤低烟无毒阻燃材料，符合环保电缆要求，基于轻质轻量化制备所需，耐热性能优异，保证差分信号传输速率和信号传输稳定性，确保电缆的电气特性，耐用性更好。
本发明是通过以下技术方案使上述技术问题得以解决。
环保型轻质化差分信号多芯屏蔽电缆，包括两个椭圆形差分信号线芯绞合形成中心线芯体，所述中心线芯体外部包覆有聚酯纤维平织布内绕包层，若干所述差分信号线芯围绕所述聚酯纤维平织布内绕包层外部共同绞合形成缆芯，所述缆芯外部依次包覆有聚酯纤维平织布外绕包层、PPS导电纤维屏蔽层和硅烷接枝交联高密度聚乙烯外护套，所述差分信号线芯包括并排间隔布置的两个内导体且共同包覆在硅烷接枝交联低密度聚乙烯内绝缘层内，所述内导体外表面包覆有耐热隔离层，所述耐热隔离层为内外双层芳纶捻线互为逆向螺旋绕包编织形成圆筒形支撑网体，所述支撑网体上周向均匀布设有若干聚丙烯腈基碳纤维，所述硅烷接枝交联低密度聚乙烯内绝缘层外部包覆有尼龙树脂绕包层。
作为优选，所述内导体为若干为若干镀锡铜单丝和若干对位型全芳香族共聚酰胺拉伸纤维丝绞合构成，所述镀锡铜单丝线径为0.0,2mm至0.04mm。
作为优选，所述耐热隔离层厚度为0.03mm至0.15mm。
作为优选，所述差分信号线芯的长短轴比为1.5:1至4:1。
作为优选，所述聚酯纤维平织布内绕包层和所述聚酯纤维平织布外绕包层厚度均为0.1mm至0.5mm。
作为优选，所述尼龙树脂绕包层为尼龙带搭盖绕包结构且搭盖率为15%至20%。
作为优选，所述尼龙树脂绕包层厚度为0.1mm至0.2mm。
作为优选，所述PPS导电纤维屏蔽层为PPS导电纤维束螺旋缠绕结构，所述导电纤维束为若干PPS纤维绞合并涂覆铜导电涂层形成，屏蔽密度为90%至95%。
作为优选，所述硅烷接枝交联高密度聚乙烯外护套厚度为0.5mm至1.8mm。
作为优选，所述硅烷接枝交联高密度聚乙烯外护套内表面设有EVA粘接层。
本发明的有益效果：
1.电缆的差分信号线芯及各层皆满足欧盟“ROHS指令”，符合环保电缆要求，不含有对人体健康有害物质，对环境无污染，有益于环境保护及可再生处理。
2.差分信号线芯的内导体外表面增加耐热隔离层，耐热隔离层采用耐热性能优异的芳纶捻线和聚丙烯腈基碳纤维编织构成，增加内导体柔韧性的同时，热稳定性优异，有效防止内导体发热时向绝缘层传导热量，提高电缆的耐热性和散热性，有效防止绝缘层变形、劣化及性能变差，保证差分信号传输速率和信号传输稳定性，延缓使用寿命，耐用性更好。
3.采用PPS导电纤维屏蔽层有助于轻质轻量化生产，屏蔽密度为90%至95%能够有效的抑制来自外部信号的干扰，确保低压差分信号传输速率和信号传输稳定性，保证电缆稳定可靠的电气特性。
4.内导体采用镀锡铜单丝和对位型全芳香族共聚酰胺拉伸纤维丝绞合构成，对位型全芳香族共聚酰胺拉伸纤维丝提高内导体的抗拉伸强度，提高耐弯曲特性，不易断线断芯，耐久使用。
附图说明
图1为本发明实施例的断面结构示意图。
图中：1-差分信号线芯，2-聚酯纤维平织布内绕包层，3-聚酯纤维平织布外绕包层，4- PPS导电纤维屏蔽层，5-硅烷接枝交联高密度聚乙烯外护套，6-内导体，7-耐热隔离层，8-硅烷接枝交联低密度聚乙烯内绝缘层，9-尼龙树脂绕包层。
实施方式
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
如图1所示，本发明实施例的环保型轻质化差分信号多芯屏蔽电缆，包括两个椭圆形差分信号线芯1绞合形成中心线芯体，所述中心线芯体外部包覆有聚酯纤维平织布内绕包层2，若干所述差分信号线芯1围绕所述聚酯纤维平织布内绕包层2外部共同绞合形成缆芯。所述差分信号线芯1的长短轴比为1.5:1至4:1。所述差分信号线芯1包括并排间隔布置的两个内导体6且共同包覆在硅烷接枝交联低密度聚乙烯内绝缘层8内，具体的说，所述内导体6为若干为若干镀锡铜单丝和若干对位型全芳香族共聚酰胺拉伸纤维丝绞合构成，所述镀锡铜单丝线径为0.0,2mm至0.04mm。所述内导体6外表面包覆有耐热隔离层7，所述耐热隔离层7为内外双层芳纶捻线互为逆向螺旋绕包编织形成圆筒形支撑网体，所述支撑网体上周向均匀布设有若干聚丙烯腈基碳纤维，所述耐热隔离层7厚度优选为0.03mm至0.15mm。所述硅烷接枝交联低密度聚乙烯内绝缘层8外部包覆有尼龙树脂绕包层9。在一个实施方式中，所述尼龙树脂绕包层9为尼龙带搭盖绕包结构且搭盖率为15%至20%。所述尼龙树脂绕包层9厚度为0.1mm至0.2mm。
所述缆芯外部依次包覆有聚酯纤维平织布外绕包层3、PPS导电纤维屏蔽层4和硅烷接枝交联高密度聚乙烯外护套5，进一步的，所述硅烷接枝交联高密度聚乙烯外护套5内表面设有EVA粘接层。所述聚酯纤维平织布内绕包层2和所述聚酯纤维平织布外绕包层3厚度为0.1mm至0.5mm。在一个实施方式中，所述PPS导电纤维屏蔽层4为PPS导电纤维束螺旋缠绕结构，所述导电纤维束为若干PPS纤维绞合并涂覆铜导电涂层形成，屏蔽密度为90%至95%。所述硅烷接枝交联高密度聚乙烯外护套5厚度为0.5mm至1.8mm。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。
Claims (10)
1.环保型轻质化差分信号多芯屏蔽电缆，其特征是：包括两个椭圆形差分信号线芯（1）绞合形成中心线芯体，所述中心线芯体外部包覆有聚酯纤维平织布内绕包层（2），若干所述差分信号线芯（1）围绕所述聚酯纤维平织布内绕包层（2）外部共同绞合形成缆芯，所述缆芯外部依次包覆有聚酯纤维平织布外绕包层（3）、PPS导电纤维屏蔽层（4）和硅烷接枝交联高密度聚乙烯外护套（5），所述差分信号线芯（1）包括并排间隔布置的两个内导体（6）且共同包覆在硅烷接枝交联低密度聚乙烯内绝缘层（8）内，所述内导体（6）外表面包覆有耐热隔离层（7），所述耐热隔离层（7）为内外双层芳纶捻线互为逆向螺旋绕包编织形成圆筒形支撑网体，所述支撑网体上周向均匀布设有若干聚丙烯腈基碳纤维，所述硅烷接枝交联低密度聚乙烯内绝缘层（8）外部包覆有尼龙树脂绕包层（9）。
2.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述内导体（6）为若干为若干镀锡铜单丝和若干对位型全芳香族共聚酰胺拉伸纤维丝绞合构成，所述镀锡铜单丝线径为0.0,2mm至0.04mm。
3.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述耐热隔离层（7）厚度为0.03mm至0.15mm。
4.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述差分信号线芯（1）的长短轴比为1.5:1至4:1。
5.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述聚酯纤维平织布内绕包层（2）和所述聚酯纤维平织布外绕包层（3）厚度均为0.1mm至0.5mm。
6.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述尼龙树脂绕包层（9）为尼龙带搭盖绕包结构且搭盖率为15%至20%。
7.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述尼龙树脂绕包层（9）厚度为0.1mm至0.2mm。
8.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述PPS导电纤维屏蔽层（4）为PPS导电纤维束螺旋缠绕结构，所述导电纤维束为若干PPS纤维绞合并涂覆铜导电涂层形成，屏蔽密度为90%至95%。
9.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述硅烷接枝交联高密度聚乙烯外护套（5）厚度为0.5mm至1.8mm。
10.根据权利要求1所述的环保型轻质化差分信号多芯屏蔽电缆，其特征是：所述硅烷接枝交联高密度聚乙烯外护套（5）内表面设有EVA粘接层。
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