In recent decades, the world has seen a rising number of Heat Shrink Tubing. Take China for an example, as China opens its door to the outside world, huge number of Heat Shrink Tubing swarm into China either for business or for instruction and many of them are widely application in different areas. In my opinion, both advantages and challenges exist in this new trend. Heat Shrink Tubing (or, commonly, heat shrink) is a tube which shrinks in diameter when heated. Its diameter and thickness can vary, and there are three main categories, thin-wall, medium-wall and thick-wall tube. It is rated by its expansion ratio, a comparative of the differences in expansion and recovery rate. Heat shrink is used to insulate wires offering abrasion resistance and environmental protection for conductors, connections, joints and terminals in electrical engineering. It can also be used to repair wires or bundle them together by Heat shrink tubing wholesalers, to protect wires or small parts from minor abrasion, and to create cable entry seals, offering environmental sealing protection between bulkheads and adding sealability to electrical junction boxes.
One application that has used this product in large quantities since the early 1970s is the covering of fibreglass helical antennas used extensively for 27 MHz CB Radio. Many millions of these antennas have been coated with this versatile plastic shrink tube product.