Master row heat shrinkable tube is used for insulation protection of busbar of substation, high and low voltage switchgear, which can make the structure of switchgear compact (shorten the distance between phases) and prevent accidental short circuit accidents. The heat-shrinkable tube of the mother row has the following characteristics:
1. The main exhaust pipe has strong flame retardancy and self-extinguishing performance.
2. Continuous heat resistance in distribution cabinet
3. Thicker wall, good insulation and impact resistance
4. Superior softness, can be covered on the bent mother row. After being covered, bending can also be carried out.
The heat shrinkable tube of the master row is usually used for the insulation protection of the master row of the power bus, the high and low voltage switchgear (10KV, 35KV switchgear), the master row of the distribution cabinet, and other types of copper bars, as well as for the waterproof and anti-corrosion of the pipes.
According to the use environment and temperature grade, high temperature shrinkable sleeve can be divided into 125 temperature shrinkable tube, 135 temperature shrinkable tube, 150 temperature shrinkable tube, 175 temperature shrinkable tube, 200 temperature shrinkable tube, 260 temperature shrinkable tube, medical shrinkable tube. High temperature shrinkable sleeve has the advantages of high temperature resistance, high mechanical strength and good chemical resistance. It is widely used in cable insulation protection, insulation treatment or stress relief at the end or connection, covering and insulation protection of wire processing, solder joint protection, double-wall heat shrinkable tube coating of electronic components, insulation protection of resistors and capacitors, anti-rust and anti-corrosion treatment of metal products, marking or color marking of wires. etc.
With its excellent performance, high temperature shrinkable sleeve is not only used as special material in aerospace, advanced technology and military technology departments, but also used in various departments of national economy. Its application scope has been extended to metal smelting, construction, electronic and electrical, textile, automobile, machinery, chemical and light industry, etc. With the improvement of the production level of domestic silicone and other raw materials, there will be tremendous reserves. Large space for development.
Because the material of heat-shrinkable tube is made of crosslinked polyolefin, the strength of crosslinked molecular bond also determines the selection of heat-shrinkable high-temperature heat-shrinkable tube. If the crosslinking degree is not high, the product with careful recycling can also be selected. Because of the use of plasticizer, the performance of raw material can be imitated, but the shrinkage rate is not high. The shrinkage force is closely related to the strength of molecular bond, and the strength of molecular bond is strong. The higher the degree, the higher the contraction rate and the greater the contraction force. As long as the cross-linked molecular bonds are strong, the shrinkage rate will be large, so heating the heat-shrinkable tube to the high elastic state during production can make it expand, cooling rapidly while maintaining expansion, this state will be fixed, heating in use, it will return to the high elastic state, but when the load is gone, it will retract. This is the principle of heat shrinkable tubes.