The application of heat shrinkable tubing in automobile harnesses comes from foreign technology. It is mainly used in the connection of various cable harnesses to play the role of insulation protection and sealing.

Heat shrinkable tubing is a kind of radiation cross-linked polyolefin heat shrink tube sleeve, also known as EVA material. It has soft and elastic, sealing, flame retardant, insulation, and temperature resistance, and will shrink when heated. It is widely used in the insulation and sealing protection of various wire harnesses, solder joints and inductors, and the rust and corrosion prevention of metal pipes/rods. It is often used on the wire joint. Select the appropriate heat shrinkable tubing and put it on the wire joint. Heat it with a hot air gun. The radiation cross-linked polyolefin heat shrink tube sleeve, shrinks and the joint are firmly sleeved. Its production process has its very special place. In production, polymer materials will experience a glass state and a high elastic state with the temperature from low to high. The performance in the glass state is close to plastic and that in the high elastic state is close to rubber. The material used in the heat shrinkable tubing is glassy at room temperature and becomes highly elastic after heating. One of the key links is irradiation, which means that the linear structure of the polymer is interrupted by the radiation source of the electron accelerator to make it become a network structure, and has the function of structural memory. At present, the gap between the quality of domestic radiation cross-linked polyolefin heat shrink tube sleeve and that of foreign countries is mainly in the control of irradiation except for the raw material formula.

In addition, according to whether the product contains glue, it is divided into single wall pipe and double wall pipe. Single wall pipe generally plays the role of connection insulation protection, and the price is relatively low. Domestic manufacturers have very mature technology in this kind of product; Because the double wall pipe contains glue, in addition to the above characteristics, it also has the function of sealing. Because the control of glue dose and glue viscosity requires a lot of experimental data inspection, it has high technical requirements for the manufacturer. Double wall pipe is widely used in automobile harness because the waterproof requirement of automobiles is very high.

In addition to this feature, the overall performance of the automobile harness heat shrinkable tube is also higher than the requirements of ordinary industries, such as anti-aging, hardness, flexibility, etc. at the same time, because it is a rubber product, the heat shrinkable tubing must have environmental ROHS certification, and some characteristics can be seen only in practical application.

Xiamen MJ Industrial Tech Co.,Ltd professional in producing ROHS,Reach,Halogen free,CSA,UL,EN45545 certified braided sleeving more than 10 years, welcome to visit our website: www.mj-ist.com for more details.