Will the heat shrink tube continue to shrink if it is heated? First of all, let me tell you the conclusion. Heat shrinkable tubes will not shrink indefinitely. This is determined by the shrinkage ratio of the heat shrinkable tube's production design. For example, if the heat shrinkable tube shrinks 2 times, no matter how it is heated, the inner diameter of the heat shrinkable tube will only shrink by 2 times at most. Therefore, when choosing heat shrinkable tubes, you also need to choose heat shrinkable tubes with corresponding shrinkage ratios in advance.

    The commonly used shrinkage ratios of heat shrinkable tubes are generally 2:1, 3:1 and 4:1. The highest shrinkage ratio can be 6:1, which is also the highest shrinkage ratio that heat shrinkable tubes can achieve at present. This shrinkage ratio is also easy to understand. 2:1 means that a heat shrinkable tube with an inner diameter of 2mm can shrink to a minimum of 1mm when heated continuously. 3:1 is a heat shrinkable tube with an inner diameter of 3mm. It can be shrunk to 1mm with constant heating, and so on.

    Another situation is that the outer diameter of the product that needs to be wrapped is 1.5mm. If you choose a heat shrink tube with an inner diameter of 2mm and keep heating it, it will only shrink to 1.5mm, not 1mm. It will only shrink to the point where it needs to be wrapped. The size of the product can no longer be reduced.

    If the product size span is large, please choose a heat shrink tube with a larger shrinkage ratio so that the product can be completely covered. Heat shrinkable tubing will not shrink indefinitely, nor will it shrink all the time when heated. At most, it can only shrink to the extruded size before expansion.