RF coaxial cables are cables with two concentric conductors, while conductors and shielding layers share the same axis. RF coaxial cable insulation material is composed of physical foaming polyethylene isolated copper wire conductor, in the inner layer insulating material outside is another layer of annular conductor, that is, external conductor, external conductor (tissue shielding layer) using copper belt molding, welding, tattoo, or the use of aluminum tube structure, or the use of woven structure, and then the entire cable by PVC material package.

We live in the home of the limited television is the RF coaxial cable, we have not encountered the coaxial cable and joints often fall off the TV channel signal is not good situation, and when we use black tape winding with the package after the TV signal back to normal, the reason is obviously the cable leakage caused by the signal transmission is not good results, The best way to solve this method is to use heat shrinkable tube, ordinary single-walled heat shrinkable tube is not enough, to know that most coaxial cables are used outdoors, should also consider waterproof effect. The environment-friendly double-walled tube is composed of radiant crosslinked polyolefin material and Hot melt adhesive double layer, the outer polyolefin insulation, flame retardant, physicochemical and electrical properties are excellent, the inner layer hot melt adhesive can buffer the mechanical strain and the sealing property is strong. The main functions are insulation, sealing, waterproofing, anti-corrosion, anti-leakage, etc., widely used in all kinds of wire harness, wire and cable and metal pipe rod, such as sealing insulation, waterproof and anti-corrosion and other fields.

Coaxial cable using double-walled heat shrinkable tube protection can prevent signal leakage, and the seal insulation waterproof effect is the best.

双壁热缩管在射频同轴电缆组件中的保护

射频同轴电缆是指有两个同心导体，而导体和屏蔽层又共用同一轴心的电缆。射频同轴电缆绝缘材料采用物理发泡聚乙烯隔离铜线导体组成，在里层绝缘材料的外部是另一层环形导体即外导体，外导体（组织屏蔽层）采用铜带成型、焊接、扎纹；或是采用铝管结构；或是采用编织结构， 然后整个电缆由聚氯乙烯材料的护套包住。

我们生活中家里的有限电视用的就是射频同轴电缆，大家有没有遇到过同轴电缆与接头经常脱落导致电视频道信号不好的情况，而当我们用黑胶布缠绕带包裹之后电视信号又恢复正常了，原因很显然是电缆外漏导致信号传输不好的结果，而解决此办法的最好方法就是使用热缩管，普通的单壁热缩管还不行，要知道大多数同轴电缆都是户外使用的，还应考虑防水效果。环保双壁管由辐射交联聚烯烃材料和热熔胶双层构成，外层聚烯烃绝缘、阻燃、理化电气性能优异，内层热熔胶能缓冲机械应变和密封性强。主要功能是绝缘、密封、防水、防腐、防漏气等，广泛应用于各类线束、电线电缆和金属管棒等的密封绝缘、防水防腐等领域。

同轴电缆使用双壁热缩管保护后一来可以防止信号外漏，二来密封绝缘防水效果都是最佳的。