Thermal endurance of high temperature fiber reinforced cellulose insulation [for transformers]

Advancements have been made in the thermal endurance of cellulose-based insulating papers by reinforcing the cellulose matrix with a high temperature synthetic fiber. This new insulating material is made by adding synthetic fibers to the cellulose pulp along with a binder material that bonds the synthetic fiber into the cellulose matrix. The high temperature fibers form a reinforcing backbone that gives the paper mechanical integrity, even after the cellulose component has thermally degraded. The authors describe how this new material has been used to improve the thermal durability of liquid-filled power transformers