The selection of heat shrinkable tube specifications
Heat-shrinkable tubing is a special type of heat-shrinkable tubing made of polyolefin material. The outer layer is made of high-quality soft glue-linked polyolefin, and the inner layer is made of hot melt adhesive. It has good insulation, anti-corrosion, abrasion resistance and other characteristics. Mainly used in many different applications of wire harnesses and cable assemblies. There are many applications in commercial electronics, military industry, trucks, automobiles and ships, communications, aerospace and other fields.
There are many specifications for heat shrinkable tubing, so how do you choose the most suitable product?
In fact, the selection of heat shrinkable tube specifications needs to be determined according to the size of the covered object. In order to determine the proper inner diameter, it is necessary to know the maximum and minimum perimeter of the material to be covered. In order to obtain the maximum perimeter, select the appropriate "provided" inner diameter of the heat shrink tube, and leave an extra 20% to 30% margin, which will provide enough space for the heat shrink tube to fit any abnormal shape. For the minimum circumference, choose a smaller shrinking inner diameter to ensure that the heat shrink tube fully shrinks and tightly wraps the object.
The selection of heat shrinkable tube specifications is also determined according to the "shrinkage rate" parameter of the heat shrinkable tube. There are several shrinkage options for heat shrink tubing, such as 2 times, 3 times, and 4 times. The high shrinkage rate enables the heat shrinkable tube to better wrap the connector body and still shrink to a smaller diameter, such as wires or cables. Generally, we recommend that the ratio of the inner diameter of the heat shrinkable tube provided and the size of the object to be protected should not exceed 40% to achieve effective coverage.
When choosing the specifications of the heat shrinkable tube, colleagues should also consider the length of the shrinkable tube. It should be noted that the heat shrinkable tube will also shrink longitudinally by 5-7% when heated. Therefore, when we choose the length, we should adjust it to ensure that it can be completely covered.
The selection of heat shrinkable tube specifications should also consider the wall thickness of the heat-shrinkable tube. The wall thickness of the heat-shrinkable tube has a difference in thickness. When selecting this parameter, the application scenario and environment should be considered.
In summary, the following factors should be considered when selecting a suitable heat shrinkable tube: the inner diameter, shrinkage rate and length of the covered material should be based on the size of the object being wrapped. Determine the appropriate wall thickness according to the use occasion and environment. The characteristics of the heat shrinkable tube, the temperature of the working environment and the temperature of the shrinkage determine the application field.