The physical foaming method has a series of advantages and benefits, such as high foaming degree, low dielectric constant ε and dielectric loss angle TG δ, reducing cable attenuation, good foaming uniformity, fine foaming hole, airtight, high production efficiency, etc. it adapts to the requirements of higher transmission frequency and wider transmission cable bandwidth in the development of communication. Physical foaming insulation is widely used in CATV, digital transmission system, low attenuation transmission test and other cables.
The key parts of the physical foaming insulation production line equipment are: gas injection and gas flow control system, extruder and head, cooling water tank length and traction control, diameter / capacitance automatic feedback control system.
The newly developed PP insulator has been used in the top five cable factories in Asia. PP is the main raw material, and dispersant and setting agent are added. Compared with PE, it has a wider range of temperature resistance, stronger support and better electrical performance.
PE /PP Physical Foaming Insulation Material For Communication Cable is mainly used in the manufacturing of RF RF coaxial cable in the field of mobile communication, CATV coaxial cable in radio and television system and railway digital signal cable developed in recent years. The application fields of the above three types of cables are different, and their performance index requirements are also different, so the corresponding requirements for foaming insulation materials are also different.
