Jacketing tube is a kind of insulation protection heat shrinkable tube commonly used on electric cables. The main material of this type of product is PE. After two processes of radiation crosslinking and heating expansion, it has the function of heat shrinkage, and the shrinkage ratio is about 3:1. , The caliber ranges from 50-350mm. It can be used as heat-shrinkable inner sheath, outer sheath, and outer insulating waterproof sheath in cable accessories.
Performance: Radiation cross-linked heat-shrinkable sheath is usually used for insulation protection of medium and low voltage power products and waterproofing of divergence of communication products. The inner wall of the product is coated with a spiral, direct-coated high-performance hot-melt adhesive. For the sealing effect, you can choose products without glue on the inner wall and glue on the inner wall.
First of all, the heat-shrinkable middle wall tube emphasizes that the wall thickness is medium thickness, which is slightly thinner than the jacket tube. Secondly, the hot-melt glue is used for the glued heat-shrinkable middle wall tube, which is directly coated with 75 calibers and spiral coating is used for specifications of 75 calibers and above. The difference is obvious from the appearance, and it is a mechanically fully coated glue. Products; The protective sleeve is usually hand-applied with glue at both ends, or it can be fully glued. The glue layer applied is cold glue, and the waterproof performance is not as good as that of the middle-wall protective sleeve. Again, due to the different gluing methods, under normal circumstances, the maximum diameter of heat-shrinkable mid-wall pipes is 200, while heat-shrinkable jacket pipes can achieve 300. The main reason is that the large-diameter spiral gluing equipment for mid-wall pipes is more expensive.
In addition, the formula of the polyethylene substrate of the two products is different, and the material of the middle wall tube is softer. Finally, due to the many differences above, there are many differences in the usage of heat-shrinkable mid-wall tubes and heat-shrinkable sheath tubes. Heat-shrinkable mid-wall tubes are mainly used for the middle connection of cables, and can also be used in other products such as automobiles. The sheath is basically used as the inner and outer sheath of the cable connection.