Currently, there has generated a heated discussion over whether Heat Shrink Tubing is application in our daily life and industrial work or not. In my opinion, I think that it plays a cruicial role in our society. For this reason, firstly, we should know the principles of it.
To some extent, it is different from other tubes. Heat Shrink Tubing 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, 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.
From other aspects, it is easily seen that One application that has used this product in large quantities since the early 1970s is the covering of fiberglass helical antennas used extensively for 27 MHz CB Radio. Many millions of these antennas have been coated with this versatile plastic shrink tube product.