To talk about how to use glued heat shrinkable tubes, we must first look at the physical properties of glued double-walled tubes. Only by understanding the material properties of glued heat shrinkable tubes can we do it in a targeted manner, and the effect will be twice the result with half the effort.
The outer layer of the adhesive heat shrinkable tube is made of cross-linked polyolefin material and the inner layer is made of hot melt adhesive. The outer layer material has the advantages of insulation, anti-corrosion and wear resistance, while the inner layer has the advantages of low melting point, waterproof, sealing and high adhesion, and can withstand temperatures ranging from minus 45 degrees to 125 degrees.
Case analysis and precautions:
1. The heat shrink tube is too close to the heating equipment, and the baking movement is too slow, destroying the material of the heat shrink tube. You must pay attention to the distance between the fire and the heat shrink tube, that is, a distance of 20-30 cm and moving up and down or left and right evenly. When heating and shrinking, do not exceed the upper temperature limit of the heat shrinkable tube. For heat shrinkable tubes, if the temperature exceeds the upper temperature limit, our product will "melt" and return to its original state.
2. Choose the appropriate heating tool. When heating and baking, the outer flame of the flame is at a 45-degree angle with the surface of the heat shrink tube. Be sure to move back and forth to heat the heat shrink tube as a whole. Slowly heat from one end to the other. It should be uniform, avoid bubbles, ensure the shape of the heat shrink tube after shrinkage, and trim it after cooling.
3. Heat shrinkable tubes have different heat shrinkage ratios. The specifications of heat shrinkable tubes generally refer to the product of the maximum allowable inner diameter of the casing after shrinkage and the shrinkage ratio. For example, the shrinkage ratio of heat-shrinkable tubes is 2:1, which means that you can choose heat-shrinkable tubes that are twice the diameter of your product. For example, if the diameter of the quilt cover is 20mm, we can choose a heat shrink tube with a maximum diameter of 40mm.
4. For linear objects such as wires, just choose a heat-shrinkable sleeve with the same outer diameter as the product; for busbar protection in power stations, electrical cabinets, etc., use busbar heat-shrinkable sleeves; if there are requirements for sealing, use waterproof heat-shrinkable sleeves Tube.