Electrical insulating paper and stationary induction electrical apparatus using the same

Electrical insulating paper used while being immersed in electrical insulating oil, the electrical insulating paper comprising:

• a paper base material mainly containing cellulose;
• an adsorption layer formed on an entire surface of the paper base material by adsorption;
• and
• a moisture barrier layer formed by being chemically bonded to the adsorption layer, wherein
• the moisture barrier layer consists of an amphipathic molecule containing both a hydrophobic hydrocarbon group and a hydrophilic functional group in one molecule,
• the amphipathic molecule is chemically bonded to the adsorption layer via the hydrophilic functional group,
• the adsorption layer includes at least one of urea, thiourea, hexamethylenetetramine, melamine, dicyandiamide, and polyacrylamide,
• the hydrophilic functional group in the amphipathic molecule contains at least one of an aldehyde group, a hydroxyl group, a carboxyl group, and a glycidyl group, and
• the hydrophobic hydrocarbon group covers the surface of the paper base material.