Transparent cable cable insulation material materials h […]
Transparent cable cable insulation material materials have been used in audio lines for a long time. With the popularization of audio and video at home and abroad, the problems of using transparent cable materials are becoming more and more concentrated. They are mainly: poor transparency and durability. Transparent material After the extruded wire is left for a period of time, there will be blushing and fogging, and the transparency will decrease. Discoloration of copper wire. After the wire is placed, the surface of the copper wire is dull and different degrees of oxidation appear. The emergence of the above problems shows that the stability system and compatibility of some of our transparent materials still need to be improved.
In addition, foreign companies also use it for the outer cover of flexible control cables. One is beautiful, the other is to prevent the shielding layer from being damaged, and sometimes it can also be used as an insulation layer for a dedicated ground wire. Plasticizers and stabilizers must be added during the process to prevent decomposition. Generally phthalic acid is the main plasticizer; tribasic lead sulfate, dibasic lead phosphite, lead stearate, cadmium stearate, etc. are commonly used stabilizers for cable materials. These stabilizers have insulation Good performance, excellent stability and low price, but it contains heavy metals lead and cadmium.
With the increasing awareness of environmental protection, people have increasingly considered the impact on the human body and the environment when choosing PVC products. The global demand for banning heavy metal stabilizers is increasing day by day, but due to technical and economic reasons, The promotion of new products has great resistance. The use of cable materials containing lead, cadmium and mercury is prohibited. This draft helps speed up the research, promotion and application of new materials worldwide. There are many auxiliary companies in countries all over the world that have actively carried out the research and development of new products and alternatives.
In general, the substitutes for lead and cadmium are concentrated in the series of barium-zinc, calcium-zinc, magnesium, organic tin and their composite stabilizers. Although barium-zinc also contains heavy metal barium, its toxicity is extremely low and its content is very low. Some companies directly develop new products that do not contain barium. But the replacement of lead stabilizers is very difficult. One of the reasons is that the price of lead stabilizers is low, and the prices of substitutes are generally more than three times higher. The second reason is that the lead stabilizers have good insulation performance, and other stabilizers cannot compare with them. The calcium-zinc system used in cable materials has strong water absorption, which affects the electrical performance.