The degree of polymerization of insulating paper refers to the degree of bonding between the fibers in the paper, which can also be understood as the strength of the connection between the fibers. The higher the degree of polymerization, the tighter the connection between the fibers, and the higher the strength and stability of the paper.

Insulating paper is usually made from natural cellulosic materials, such as wood pulp fibers. During the manufacturing process, the cellulosic material forms pulp in water, which is then passed through the steps of filtration, pressing and drying to form paper.

Different types of cellulosic materials have different structures and properties, so their degree of polymerization in the pulp may vary. For example, hardwood fibers usually have a higher degree of polymerization than softwood fibers.


The way the pulp is prepared affects the degree of fiber dispersion and the connectivity between fibers. Mechanical pulping methods may result in the presence of fiber bundles, which can reduce the degree of polymerization, while chemical pulping methods can better disperse the fibers and increase the degree of polymerization. The production process for paper includes steps such as pressing, drying and calendering, which can affect the strength of the connections between fibers. Proper pressing and drying can promote the bonding of fibers and increase the degree of polymerization.

Insulating papers with a high degree of polymerization have better strength and tensile properties, providing higher electrical insulation and mechanical strength. They are widely used in electrical equipment such as power transformers, motors and capacitors. In addition, high degree of polymerization paper can also provide better temperature resistance and chemical stability to adapt to a variety of environmental conditions and application requirements.

Polymerization degree of insulating paper is an important indicator of paper quality, and manufacturers usually control the selection of raw materials and optimize the production process to achieve higher polymerization degree. At the same time, the polymerization of paper can also be evaluated through measurement and testing methods to ensure that it meets the requirements of a specific application.