Waterproof effect of Heat Shrinkable Double-walled Tube

The waterproof function of Heat Shrinkable Double-walled Tube needs to be introduced from its production technology and structure. Because it has a double layer structure, inside and outside the double layer composite processing, waterproof heat shrinkable tube is produced by flame retardant polyolefin and adhesive layer co-extrusion material, so it is called double wall heat shrinkable tube. The outer layer is made of high quality polyolefin polymerization, with strong wear resistance, insulation, corrosion prevention and other functions; The inner layer is hot melt adhesive with low melting point, strong adhesion, excellent sealing and mechanical buffering performance.

For example: high quality heat shrinkable tube heating shrinkage temperature and heat shrinkable tube softening melting temperature between a temperature interval, so the heat shrinkable tube in the process of heating shrinkage still maintain a good shape, with the movement of the heating area can be the heat shrinkable tube inside the air emptied. But inferior in heat shrinkable tube heating temperature and shrinkage of soft melting at the same time, so there are often air sealed in heat shrinkable tube, bumpy appearance to the heat shrinkable tube, in order to eliminate air bubbles will need to be in the heat shrinkable tube is in a state of softening with steel needle out there deflated, because in the process of thermal shrinkage tube cooling contraction, the eye of a needle on the surface heat shrinkable tube forming many scars and empty, The protective effect of the coating will not be achieved. So the quality of heat shrinkable tube is very important.