聚氨酯拖链电缆与普通拖链电缆的区别就是外护套材料换成聚氨酯材料，使电缆更加耐弯曲、耐折、耐磨、耐油，用于连续往复运动下的移动使用。聚氨酯拖链电缆组成成分：
导体：精细无氧裸铜丝，多股绞合；
绝缘：高强度进口PE材料；
内护套：高强度特种复合护套专用材料；
屏蔽：防氧化镀锡铜网编织屏蔽，编织密度≥85%以上，可有效防止来自内部和外部的干扰；
外护套：高强度进口PUR材料；
护套颜色：灰色，黑色，橙色，绿色；
额定电压：<0.5mm，300/300V；≥0.5mm，300/500V；
使用温度范围：固定安装：-40℃~80℃；移动使用：0℃~70℃；
最小弯曲半径：固定安装：5X电缆外径；移动使用：7.5X电缆外径；
聚氨酯拖链电缆应用于数控机床，立车，玻璃机械，木工机械，机器人机械手，切割机，雕刻机，门窗机械等多种自动化机械设备。
二、聚氨酯拖链电缆特性
1、耐磨性：聚氨酯材质具有高耐磨损性能，替代丁腈护套拖链电缆线适用于高耐磨环境；
2、耐油性：对于长时间接触或浸泡油污的环境下的电缆，特别是具有腐蚀性的油污，聚氨酯护套的拖链电缆线满足需求，且可在这样的环境下长时间移动弯曲使用，其性能是常规丁腈材质护套电缆不可替代的；
3、防水性：对于长时间接触水或者直接浸泡在水中，如应用于远洋水下设备的高柔性电缆，以防海水专用聚氨酯材质作为护套，防水性能优异，耐水解；
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4、温度范围：聚氨酯拖链电缆产品，其瞬间高温可达105℃，长时间的工作温度范围在-40~+90℃，具有优异的高低温性能；
5、聚氨酯护套材质较之于弹性体丁腈，具有更加优异的耐机械性能，随设备的长时间循环往复移动弯曲，能够适用于更高的移动速度和加速度的场合和环境。
三、聚氨酯拖链电缆型号规格
聚氨酯拖链电缆型号就是根据通用拖链电缆型号表示，只不过为了区分普通拖链电缆型号在后面加PUR（聚氨酯）例如：
TRVV-PUR：铜芯聚氨酯护套拖链电缆，一般有(2-14)*(4-6)mm2、(2-61)*(0.75-2.5)mm2近六十余种规格；
TRVVP-PUR：铜芯聚氨酯护套、软护套镀锡铜丝网编织屏蔽拖链电缆，一般有(7-61)*(0.75-1.5)mm2近五十余种规格；
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TRVVSP-PUR：铜芯聚氨酯护套对绞总屏蔽拖链电缆，有(4-61)*(0.5-2.5)mm2、(4-37)*(1.5-2.5)mm2六十余种规格；
RVVYP-PUR：铜芯聚氨酯特殊护套耐油总屏蔽拖链电缆，有(7-61)*(0.75-1.5)mm2近六十余种规格
