Double-walled heat shrinkable tubes and single-walled heat shrinkable tubes are both heat shrinkable tubes, and both have the function of heating and shrinking. The only difference between the two is the shape, structure and application site. As you can easily understand from the name, single-wall heat shrink tubing refers to only one layer; while double-wall heat shrink tubing refers to a double-layer structure with sealing and waterproof glue on the inner wall, which is co-extruded during production, so it is called Double-wall heat shrink tubing, the differences between the two are introduced in detail below.

1. Differences in morphological structure:

    Double-wall heat shrink tubing has a double-layer structure, so it is called double-wall heat shrink tubing. The outer layer is a protective layer, and the inner wall has a layer of hot melt adhesive. It is produced through co-extrusion, which has better sealing and protection effects.

Single-wall heat shrink tubing has only one layer, so it is called single-wall heat shrink tubing. There is no hot melt adhesive on the inner wall, only a protective layer.

    You can clearly see from the picture that on the left is a double-walled heat shrinkable tube. After shrinking, there is a sealing and waterproof hot melt adhesive layer on the inner wall. The single-wall heat shrinkable tube on the right has only a single-layer structure.

2. Different application places:

    Single-walled tubes are used in environments that do not require waterproofing. They only serve as low-voltage insulation, such as bundling wire harnesses and protecting electronic components. Single-walled heat shrinkable tubes are mainly used for insulation and component protection.

    Double-walled heat shrinkable tubing is used in environments that require waterproof and dustproof sealing. Hot melt adhesive has excellent adhesion performance and can also prevent displacement and shock absorption. The main functions of double-wall heat shrink tubing are waterproof, dustproof, and multi-wire harness fixation.

3. Differences in wall thickness:

    Due to its double-layer structure, the wall thickness of double-walled heat shrinkable tubes will be thicker than ordinary heat shrinkable tubes. For double-walled heat shrinkable tubes and ordinary heat shrinkable tubes with the same inner diameter, double-walled heat shrinkable tubes will be at least 50% thicker than ordinary heat shrinkable tubes. above

    After cutting, the inner wall of the double-wall heat shrink tube on the left has a mirror effect, and a layer of hot melt glue can be clearly seen, while the single wall heat shrink tube on the right has a matte effect. The difference from the actual product is very simple.