Most of the previous heat shrink tubes are made of PVC, but its performance in all aspects is not very satisfactory, after upgrading to PET heat shrink tubes, the result is completely different. PET heat shrink tubes have non-toxic and environmentally friendly characteristics, will not cause harm to humans and the environment; and its mechanical strength, high temperature resistance and electrical insulation properties are greatly exceeded by the PVC heat shrink tubes, very popular among users. It is very popular among users.
In fact, PET heat-shrinkable tube is a special type of polyolefin material heat-shrinkable sleeve, which is heated to brittle at room temperature and then has the functions of high-temperature shrinkage, insulation corrosion and flame retardant. As PET heat shrink tubing is made of hot melt adhesive double layer co-extruded and polyolefin halogen free flame retardant material, so the outer layer is insulated and low temperature shrinkage, the inner layer has good adhesion and low melting point.
Since the double-layer PET heat shrink tube plays an important role, its quality is also quite important, once the use of poor quality products will cause serious consequences. Since there is a temperature range between the heating and shrinking temperature of high quality PET heat shrink tubing and the softening and melting temperature of heat shrink tubing, it remains in good shape during the heating and shrinking process.
However, inferior PET heat shrink tubing is softened and melted while heated to shrink temperature, leaving air usually enclosed in the heat shrink tubing and the heat shrink tubing in a softened state to eliminate air bubbles, which tend to form a lot of scars and holes on the surface of the tubing.
The poor quality of PET heat shrink tube is not only due to axial shrinkage, but also axial slenderness and unevenness of the processed product heat pipe. In this case, often take the blade will be stretched out of the PET heat shrinkable tube cut off on the surface of the measures to solve the problem.