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CN105713147A - 一种辐照交联同轴电缆用材料及其制备方法 - Google Patents

一种辐照交联同轴电缆用材料及其制备方法 Download PDF

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CN105713147A
CN105713147A CN201610272989.0A CN201610272989A CN105713147A CN 105713147 A CN105713147 A CN 105713147A CN 201610272989 A CN201610272989 A CN 201610272989A CN 105713147 A CN105713147 A CN 105713147A
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钱东力
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ZHONGSHAN FANYA ELECTRIC INDUSTRY Co Ltd
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Abstract

本发明公开了一种辐照交联同轴电缆用材料及其制备方法，该辐照交联同轴电缆用材料采用发泡交联电缆材料作发泡层生产，所述发泡交联电缆材料包括以下重量份组份：LDPE 90～95份，TMPTA 5～10份，AC 0.1～0.5份，然后采用皮?泡?皮三层共挤挤塑机分别熔融挤出、冷却、收盘、辐照制备而得。本发明材料组成简单，添加助剂减少，提高了材料的介质损耗角，并且制得的产品环保，安全，使用寿命长，耐化学性，耐辐射，耐热性能可达到耐环境温度105℃。

Description

一种辐照交联同轴电缆用材料及其制备方法
【技术领域】
本发明涉及一种辐照交联同轴电缆用材料及其制备方法，属于电缆技术领域。
【背景技术】
现在常规通讯用同轴电缆的耐热温度约为80℃，在环境温度较高的状态下传输性能不稳定，容易造成衰减增大，信号失真。通常氟塑料同轴电缆使用温度达200℃，但其含氟量较高会带来环保问题而是使用受到局限。另一方面，为了提高加工性能，在材料中添加多种助剂，但这些添加助剂会严重影响通迅电缆的电气性能。
【发明内容】
本发明的目的是为了克服现有技术的缺陷，提供一种环保安全，耐热耐气候，而又能满足通讯电缆要求的电气性能指标，使用寿命长的辐照发泡交联同轴电缆用材料。
本发明的另一目的是提供一种上述辐照发泡交联同轴电缆材料的制备方法。
本发明为实现上述目的，采用以下技术方案：
一种辐照交联同轴电缆材料，其特征在于采用发泡交联电缆材料生产，所述发泡交联电缆材料包括以下重量份组份：
LDPE 90～95份
TMPTA 5～10份
AC 0.1～0.5份。
本发明一种辐照交联同轴电缆材料，其特征在于所述发泡交联电缆材料包括以下重量份组份：
LDPE 93～95份
TMPTA 5～8份
AC 0.3～0.5份。
本发明一种辐照交联同轴电缆材料，其特征在于所述发泡交联电缆材料包括以下重量份组份：
LDPE 90～93份
TMPTA 8～10份
AC 0.1～0.3份。
本发明一种辐照交联同轴电缆材料，其特征在于所述发泡交联电缆材料包括以下重量份组份：
LDPE 92～94份
TMPTA 5～8份
AC 0.2～0.3份。
其中LDPE(低密度聚乙烯)为电缆用绝缘材料，熔融指数小于1.8g/10min,介电常数不大于2.3，介质损耗角小于0.00007；TMPTA(三羟甲基丙烷三丙烯酸酯)为敏化剂；AC(偶氮二甲酰胺)为发泡剂。
本发明一种辐照交联同轴电缆材料，其特征在于通过以下制备方法制得发泡交联电缆材料：将各组分混合均匀加入双螺杆挤塑机中熔融挤出，冷却后再干燥切粒即可。
制备发泡交联电缆材料的双螺杆挤塑机各区段加热温度具体设定如下：
1区：140～160℃，2区：150～170℃，3区：160～170℃，4区：155～175℃。
本发明一种辐照交联同轴电缆用材料的制备方法，其特征在于包括以下步骤：
a、将本发明的发泡交联电缆用材料加入烘干机，于温度80-85℃下干燥120min；
b、将烘干后的发泡交联电缆材料加入长径比为1:35的发泡挤塑机中，注入压力为18～24MPa的氮气挤制发泡层，在内皮挤塑机和外皮挤塑机中分别加入105℃辐照交联聚乙烯电缆料用来挤制内皮层和外皮层，采用皮－泡－皮三层共挤挤塑机熔融挤出并冷却；
c、收盘后送辐照机对芯线进行电子束轰击辐照，辐照剂量为16M。
其中步骤b中内皮层和外皮层用材料为外购标准的105℃辐照交联聚乙烯电缆料，皮-泡-皮中的泡为发泡层，采用本发明发泡交联电缆材料并注入氮气物理发泡而成。
本发明三层共挤挤塑机的各区加热温度设定如表1所示。
表1：
项目 1区(℃) 2～7区(℃) 8区(℃) 9区(℃)
内皮挤塑机 140～160C 170～180 —— ——
发泡挤塑机 155～165C 160～180 165～190 180～230
外皮挤塑机 140～160 170～180 190～200 ——
本发明内皮层增加了金属导体与发泡绝缘层的附着力；外皮层能确保交联发泡过程的电缆绝缘芯线外表面平整光滑，外径圆整、稳定，以确保同轴电缆阻抗和驻波比性能达标。
本发明辐照交联同轴电缆绝缘芯线是采用交联发泡材料生产，利用电子加速器产生的高能电子束轰击绝缘层，将分子链打断形成高分子自由基，然后高分子自由基重新组合成交联键，从而使原来的线性分子结构改变成三维网状的分子结构而形成发泡交联绝缘层。
辐照交联发泡同轴电缆具有环保、安全、寿命长、有特殊的耐热性、耐化学性、耐辐射等特点。普通同轴电缆工作的耐环境温度一般为75℃，辐照交联发泡同轴电缆工作的耐环境温度可达105℃。
与现有技术相比，本发明有如下优点：
本发明材料组成简单，添加助剂减少，提高了材料的介质损耗角，并且制得的产品环保，安全，使用寿命长，耐化学性，耐辐射，耐热性能可达到耐环境温度105℃。
【具体实施方式】
一种辐照交联同轴电缆材料，采用发泡交联电缆材料与交联聚乙烯电缆材料经皮-泡-皮三层共挤挤塑生产，其中发泡交联电缆材料包括以下重量份组份：LDPE 90～95份，TMPTA 5～10份，AC 0.1～0.5份；
其中发泡交联电缆材料制备时将各组份混合均匀加入双螺杆挤塑机中熔融挤出，冷却后再干燥切粒即可；
制备辐照交联同轴电缆材料时，先将发泡交联电缆材料加入烘干机，于温度80～85℃下干燥120min，然后将烘干后的发泡交联电缆材料加入长径比为1:35的发泡挤塑机中，注入压力为18～24MPa的氮气挤制发泡层，在内皮挤塑机和外皮挤塑机中分别加入105℃交联聚乙烯电缆料挤制内皮层和外皮层，采用皮－泡－皮三层共挤挤塑机熔融挤出并冷却，收盘后送辐照机以16M辐照剂量对芯线进行电子束轰击辐照即可。
以下通过具体实施方式对本发明做进一步更详细的说明。
实施例1：
将以下重量份组份混合均匀由双螺杆挤塑机制备发泡交联电缆材料：LDPE 90份，TMPTA 10份，AC 0.5份。
将制得的发泡交联电缆材料加入烘干机料斗中，于80℃烘干120min，然后将处理后的发泡交联电缆材料加入发泡挤塑机料斗内，注入氮气，压力为20MPa，将105℃交联聚乙烯电缆材料分别加入内皮挤塑机和外皮挤塑机料斗内，采用三层共挤挤塑机分别熔融→挤出→冷却→收盘→辐照工艺生产即可。
三层共挤挤塑机的各区加热温度设定如下：
实施例2：
将以下重量份组份混合均匀由双螺杆挤塑机制备发泡交联电缆材料：LDPE 93份，TMPTA 8份，AC 0.3份。
将制得的发泡交联电缆材料加入烘干机料斗中，于83℃烘干120min，然后将处理后的发泡交联电缆材料加入发泡挤塑机料斗内，注入氮气，压力为18MPa，将105℃交联聚乙烯电缆材料分别加入内皮挤塑机和外皮挤塑机料斗内采用三层共挤熔融→挤出→冷却→收盘→辐照工艺生产即可。
三层共挤挤塑机的各区加热温度设定如下：
实施例3：
将以下重量份组份混合均匀由双螺杆挤塑机制备发泡交联电缆材料：LDPE 95份，TMPTA 5份，AC 0.5份。
将制得的发泡交联电缆材料加入烘干机料斗中，于85℃烘干120min，然后将处理后的发泡交联电缆材料加入发泡挤塑机料斗内，注入氮气，压力为24MPa，将105℃交联聚乙烯电缆材料分别加入内皮挤塑机和外皮挤塑机料斗内采用三层共挤熔融→挤出→冷却→收盘→辐照工艺生产即可。
三层共挤挤塑机的各区加热温度设定如下：
以上实施例1-3制备的辐照交联同轴电缆材料，耐环境温度均可达到105℃。

Claims (6)

1.一种辐照交联同轴电缆材料，其特征在于采用发泡交联电缆材料生产，所述发泡交联电缆材料包括以下重量份组份：
LDPE 90～95份
TMPTA 5～10份
AC 0.1～0.5份。
2.根据权利要求1所述的一种辐照交联同轴电缆材料，其特征在于所述发泡交联电缆材料包括以下重量份组份：
LDPE 93～95份
TMPTA 5～8份
AC 0.3～0.5份。
3.根据权利要求1所述的一种辐照交联同轴电缆材料，其特征在于所述发泡交联电缆材料包括以下重量份组份：
LDPE 90～93份
TMPTA 8～10份
AC 0.1～0.3份。
4.根据权利要求1所述的一种辐照交联同轴电缆材料，其特征在于所述发泡交联电缆材料包括以下重量份组份：
LDPE 92～94份
TMPTA 5～8份
AC 0.2～0.3份。
5.根据权利要求1-4中任一项所述的一种辐照交联同轴电缆材料，其特征在于通过以下制备方法制得发泡交联电缆材料：将各组分混合均匀加入双螺杆挤塑机中熔融挤出，冷却后再干燥切粒即可。
6.一种权利要求5所述辐照交联同轴电缆材料的制备方法，其特征在于包括以下步骤：
a、将发泡交联电缆材料加入烘干机，于温度80～85℃下干燥120min；
b、将烘干后的发泡交联电缆材料加入长径比为1:35的发泡挤塑机中，注入压力为18～24MPa的氮气挤制发泡层，在内皮挤塑机和外皮挤塑机中分别加入105℃交联聚乙烯电缆料挤制内皮层和外皮层，采用皮－泡－皮三层共挤挤塑机熔融挤出并冷却；
c、收盘后送辐照机对芯线进行电子束轰击辐照，辐照剂量为16M。
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