Transformer Cellulose-Based Pressboard:

Insulation PB is composed of fiber, is a very hydrophilic material, with hygroscopic, its moisture content with the environmental temperature and humidity change and change, and the cardboard water content has a great impact on the cardboard performance, because the customer must consider the characteristics in the use process:

1. Within a certain range, the tensile strength of cardboard with cardboard water content enhancement and decline.

2. Within a certain range, the cardboard elongation increases with the cardboard water content.

3. Cardboard expansion rate with the increase of cardboard water content and increase, but the three directions of cardboard (longitudinal, transverse, thick to) the degree of influence is not the same, so in the determination of cardboard processing precision geometry size must be considered cardboard water content change to the impact of the size.