The difference between heat shrink tube and cold shrink tube
The difference between heat shrink tube and cold shrink tube: 1. The main raw materials used in the production are different
The raw materials of heat shrink products are mainly polyolefins. The main raw materials for heat shrink tubes and heat shrink cable accessories produced by our company are PE, and other manufacturers will make PVC heat shrink tubes and Mylar tubes. In the case of a cold shrink tube, a material superior in electrical properties and physical properties of silicone rubber is its main raw material.
The difference between heat shrink tube and cold shrink tube: 2. Different crafts and processes
The heat shrink tube is produced by the manufacturer's own formula through granulation-continuous extrusion-irradiation-continuous or segmental expansion, and the production process steps are very complicated. The cold shrinking production process is relatively small, and is formed by the high-temperature vulcanization of the injection molding equipment and the pressure equipment, and the support strip is added to keep it in an expanded state.
The difference between heat shrink tube and cold shrink tube: 3. Different principles of shrinkage
The heat shrink tube is modified by electron accelerator irradiation to make the material have a "memory function", and is expanded by a high-temperature oil-bath in the production process, so that the heat shrink tube shrinks when it encounters a heat source. When the cold shrink tube is used, it does not need heat source heating. It only needs to withdraw the inner white support strip to retract. This is because the material of the cold shrink tube silicone rubber has a constant shrinkage elasticity. It is like the rubber band used in our daily life. Similarly, the support that has been in the state of expansion has naturally contracted to its original size.