Fine cellulose fibers and production method therefor, nonwoven fabric, and fiber-reinforced resin and production method therefor

Abstract

An embodiment of the present disclosure provides fine cellulose fibers that satisfy, in measurement using an automatic fiber shape analyzer, all of (i) the length weighted average fiber length of fibers having a fiber length of at least 100 μm is 110-500 μm, (ii) the average fiber diameter is at most 42.5 μm, (iii) the fine fiber area ratio is at most 90%, (iv) the number frequency of fibers having a fiber length of 20-56 μm is at most 97% among fibers having a fiber length of less than 100 μm, (v) the number frequency of fibers having a fiber length of at least 411 μm is at most 54% among fibers having a fiber length of at least 100 μm, and (vi) the average fiber diameter is 20-150 nm in terms of specific surface area.

Dependencies are inferred from the claim text.