| 摘要 |
PROBLEM TO BE SOLVED: To provide cellulosic electric insulating paper which is not required to impregnate resin or oil even if a paper manufactured by a known paper machine is used, which is excellent in electric insulation, heat resistance, and processability, and especially which has excellent electric insulation even in a high-humidity environment.SOLUTION: The electric insulation includes at least three thermoplastic resin layers and two paper layers alternately laminated, both outermost layers being the thermoplastic resin layers, the thermoplastic resin layers are formed on the paper layer by the melt extrusion laminating method, and the paper layer is formed of pulp fibers of which Canadian Standard Freeness is 400-600 ml and contains a rosin sizing agent. |
