Electrical Insulating Cardboard with Excellent Insulation Strength and Mechanical Properties

The thick electric insulating paperboard which is made in the wet paperboard machine is divided into a hot pressing method and a cold pressing method according to the drying method. The so-called cold pressing method is a process in which one or more sheets of paper are successively or intermittently removed from the wet paperboard on a common hydraulic machine, and then dried by a special machine drying device to make the product reach the standard moisture.

In the so-called hot pressing method, the formed wet cardboard is treated by a special hot press. The dewatering and drying of the wet paperboard are carried out simultaneously in the hot press, and finally the paperboard moisture is brought to the process specified by the process. The paperboard produced by the cold pressing method is soft, has good processing performance and good bending performance. However, compared with the paperboard produced by the hot pressing method, there are still disadvantages such as uneven moisture of the paperboard, large shrinkage ratio and small tightness range. The products produced by the hot pressing method not only have good mechanical properties, high insulation strength, but also uniform thickness and flat surface. Different tightness products can be produced according to different purposes.

With the development of the electrical industry, high insulation. Insulated crepe paper with high strength, high temperature resistance and adaptability to various environments. Copper-clad laminates for printed circuits are also rapidly evolving due to the needs of the electronics industry. China’s electrical and electronic laminates have gradually developed after liberation. China’s thermosetting laminates have formed a relatively complete series.