RUST-PREVENTIVE SHEET

摘要

A rust-preventive sheet is disclosed as a packaging material for preventing the corrosion of silver and copper products. In the sheet, the ability of zinc oxide to adsorb hydrogen sulfide is sufficiently exhibited. The rust-preventive sheet is obtained by coating or impregnating at least one side of a support with a coating fluid obtained by mixing a binder with zinc oxide which has an average particle diameter as measured with a laser diffraction type particle size analyzer of 0.2-1.0 µm, excluding 0.2 µm, and has a hydrogen sulfide adsorption of 0.01-1.0 mmol/g. The mass proportion between the ingredients (zinc oxide/solid matter of binder) in the coating fluid is preferably from 95/5 to 70/30. The rust-preventive sheet preferably has a gas permeability higher than that of the support itself by 200 sec or less.