With the rapid development of power, electronics, communication and other industries, China has become the largest cable manufacturer in the world. The popularization and application of Cable Materials For Foaming Insulation technology in communication cable has played a huge role in promoting the development of communication industry.
In the communication cable, there are two kinds of foaming modes of insulating materials: chemical foaming and physical foaming. Because the foaming degree of chemical foaming is low, and the residual of foaming agent has a certain degree of negative impact on the electrical indicators of the cable. Therefore, the current application is not as wide as physical foaming.
Physical foaming technology (including N2 and CO2) 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.
