Fiber sheet and method for producing the same

Abstract

To improve the strength of a fiber sheet such as paper.SOLUTION: A fiber sheet according to the embodiment of the present invention contains cellulose fibers that satisfy the following conditions (A) to (C), and the proportion of the cellulose fibers that satisfy (A) to (C) among all the cellulose fibers contained in the fiber sheet is 50 mass% or more: (A) the cellulose fibers have an anionic functional group, at least a part of which is in a salt form; (B) the number average fiber width is 1 μm or more; and (C) when an aqueous suspension having a cellulose fiber concentration of 0.2 mass% and adjusted to 20°C, is filtered using a filter with an opening of 60 μm, the content of the cellulose fibers in the filtrate is 0.06 mass% or less.SELECTED DRAWING: None

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