Because heat shrink tubing has the function of heating and shrinking, there are two inner diameter sizes. One is the diameter before shrinkage, and the other is the diameter after shrinkage. Many users who are new to heat shrink tubing cannot distinguish the specifications and sizes of heat shrink tubing. Does it refer to the size before shrinkage or the size after shrinkage? As a heat shrinkable tube manufacturer, I can tell you responsibly: The size of the heat shrinkable tube refers to the inner diameter before shrinkage.

Interpretation of heat shrink tube specifications

    Please follow the DUWAI editor to explain in detail what else is known about the specifications and dimensions of heat shrink tubes. When marking the dimensions of heat shrink tubes, the method of (inner diameter before shrinkage/inner diameter after shrinkage) is generally used. For example, if it is marked φ3.0/1.5mm, 3.0 refers to the inner diameter before shrinkage, and 1.5 after the slash refers to the inner diameter after shrinkage. This method is very simple and clear, and you can know the inner diameter before shrinkage and after shrinkage at a glance. Therefore, when marking heat shrinkable tubes, both the inner diameter before shrinkage and after shrinkage are marked. You can quickly know the shrinkage rate. 3.0/1.5 is twice the shrinkage rate.

    However, when purchasing heat shrink tubing, the default size is usually the size before shrinkage. If the heat shrink tubing is φ3.0mm, the heat shrink tubing manufacturer will interpret it as the size of 3.0mm before shrinkage. Additional attention is required here. This is why I told you earlier that the heat shrinkable tube specifications refer to the inner diameter before shrinkage.

    There are many specifications of heat shrinkable tubes. As long as you learn how to mark the specifications of heat shrinkable tubes, you can easily choose the appropriate heat shrinkable tube and you will be handy when using it. Everyone must keep in mind the specifications of heat shrinkable tubes. Size refers to size before shrinkage.