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The basic knowledge of heat shrink tube

2023-03-15
In the purchase of heat shrinkable tube, often purchasers ask about the relevant technical parameters of heat shrinkable tube. In the last article, we mainly introduced the internal diameter, wall thickness, shrinkage rate and related indexes of the initial shrinkage temperature of the heat shrink tube. This paper will introduce the complete shrinkage temperature and working temperature of the heat shrink tube, two technical indexes.

1. Full contraction temperature

The complete shrinkage temperature of the heat shrink tube refers to the temperature at which the heat shrink tube can achieve complete shrinkage. For example, when the heat shrink tube is heated to 84℃, it will not immediately change back to its original shape like a rubber band. The shrinkage of the heat shrink tube is a gradual process. Heat it to the final shrinkage temperature, if it is 120℃, then it can be completely contracted.

2. Operating temperature

This temperature is an important parameter of the heat shrink tube. The working temperature sometimes refers to the rated temperature, which is the temperature at which the casing can work normally and continuously. The previous initial temperature and full shrinkage temperature refer to the temperature at which the processing heat shrink tube can be shrunk, taking the Φ6 heat shrink tube as an example.

When the temperature reaches 84℃, the tube starts to shrink, and then slowly shrinks to the size of 5 and 4. When the temperature reaches the final shrinkage temperature of 120℃, the tube completely shrinks to 3, tightly wrapped on the surface of the object, and then the process of processing and heating is over. For example, the normal working temperature of the heat shrink tube is -55℃ to 125℃. We know that many times the products will be sold to different places. Some places are cold and some places are hot, so it has a certain range of application. Once the temperature exceeds the normal use may not be able to ensure the service life of the heat shrink tube, may not work normally. 

The Operating temperature is the temperature at which the heat shrink tube can play an insulating and protective role. If the temperature exceeds this, it may not be able to play a role.

heat shrinkable tube

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The basics of heat shrinkable tubes

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Common problems with heat shrinkable tube
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