Why does glued heat shrink tubing have the function of sealing and waterproofing? Why does glued heat shrinkable tubing have the function of being called waterproof heat shrinkable tubing? Why does glued heat shrinkable tubing have the function of being waterproof? Can glued heat shrink tubing reach IP67? Editor DUWAI Yi will answer these two questions in detail next.

Why does adhesive heat shrink tubing have waterproof function?

    The answer is simple, it depends on its production process and structure. Because it has a double-layer structure and is made of double-layer composite processing inside and outside, the waterproof heat-shrinkable tube is produced by the co-extrusion process of polyolefin and hot-melt adhesive for the bonding layer, so it is called glued heat-shrinkable tube. The outer layer is made of high-quality polyolefin polymerized and has strong wear resistance, insulation, and anti-corrosion functions; the inner layer is hot melt adhesive, which has a low melting point, strong adhesion, and excellent sealing and mechanical buffering properties. Because the inner wall is coated with a hot melt adhesive sealing layer, it has a waterproof function and is often used in waterproof and moisture-proof places. Its structure is as follows

Can glued heat shrink tubing reach IP67?

    First of all, we need to figure out what IP67 means: without damaging the shell, 6 means that the entire dust cannot enter the gap beyond the shell, 7 means that under normal temperature and pressure, when the shell is temporarily immersed in 1 meter of water for 30 minutes, it will No harmful effects. To put it simply, IP67 means that dust cannot enter the object and the entire diameter cannot exceed the gap of the shell. It is resistant to short-term immersion. Under normal temperature and pressure, temporary immersion of the shell in 1M deep water will not cause harmful effects.

    After the adhesive heat shrinkable tube shrinks on the surface of the component, the hot melt glue on the inner wall of the adhesive heat shrinkable tube will flow and fill the gap between the entire heat shrinkable tube and the component. After the heating is completed, it will quickly condense under normal temperature and the heat will be released. The shrink tube is tightly bonded to the components. In the absence of external damage, dust and water vapor cannot enter the protective part of the double-wall heat shrink tube. Therefore, the glued heat shrinkable tube can reach IP67 protection level. After our actual measurement, the glued heat shrink tube shrank on the cable. Place a piece of water absorption test paper on the cable covered by the glued heat shrink tube. Place it in 1 meter of water. Take it out for half an hour and peel off the glued heat shrink tube. The test strips on the protected areas of tubes and cables are dry and have no discoloration. Therefore, the glued heat shrink tube can meet IP67 waterproof and dustproof requirements.

    The waterproof heat shrinkable tube is designed to be waterproof and dustproof. The cable protection of the water pump can work in the water for a long time, which shows that its waterproof performance is very good. This product has been proven through long-term use and is a very good protective product in water and buried wires. In industrial applications, IP protection must be considered, and for standard industrial systems in enclosed buildings, IP54 protection against dust and splashing water is used. In the automotive industry, IP65 dust and water spray protection is generally used. The protection level of adhesive heat shrinkable tubes can reach IP67, which can be used in industrial systems and the automotive industry to provide consumers with better protection levels.