The wall thickness of the heat shrink tubing, can be divided into a wall thickness before shrinking and after shrinking completely. Because the applicable size of the wrapped object is different, the actual shrinkage will not be achieved. Therefore, the wall thickness before shrinking is more suitable as a standard for evaluating the performance index of the heat shrink tubing.

Wall thickness is the most intuitive indicator of performance and price of heat shrinkable tubes. In terms of price, the thicker the wall thickness and extruding the same length, the more material will be required, the relative cost will be higher, and the price will be a bit more expensive. That's why you get the same performance specifications of products, different manufacturers have different prices. One important factor is wall thickness. A slight change in wall thickness can affect sensitive prices.

However, this is not to say that the thicker the better, the performance is also an important consideration. In some cases, the thicker is better than the thinner, such as where insulation protection and tensile strength are required. On the contrary, sometimes the thinner Thick is good, like space tight or temperature sensitive. This needs to be combined with the actual needs of customers. Some customers need a very thin effect after shrinking, so they must have ultra-thin wall thickness before shrinking. You might think that ultra-thin ones are cheaper than relatively thick ones. This is not necessarily the case, and the factor of technical requirements must also be considered. Because the thinner, the more difficult the production will be. This involves the concept of wall thickness uniformity, which is also one of the important factors affecting the performance of heat shrink tubing.

The uniformity of wall thickness can be understood as the difference between the thickest and the thinnest thickness of the heat shrink tubing. The smaller the difference, the more uniform the proof. Because the heat shrink tubing will inevitably produce different wall thickness during the production process, as long as it is controlled within the normal range, it is still acceptable. This is the positive and negative tolerance on the wall thickness indicated in the specifications. The uniformity of the wall thickness must test the accuracy of the machine on the one hand, and the technology of the production master on the other. The thinner the wall thickness, the higher the requirements for uniformity and the higher the technical requirements for people and machines. Because small deviations can have a fatal effect on the heat shrink tube. When choosing the heat shrink tubing, not only the wall thickness, but also the positive and negative tolerances of the wall thickness, take a few more cuts, and measure whether the wall thickness is within the range and whether it is uniform.

The parameter of wall thickness seems simple, but in practical applications, it is often easy to be ignored. If the wall thickness is selected properly, the desired effect can be obtained; otherwise, the effect may not be achieved and the product performance will be affected.