To optimize the production process of ultra-thin fiberboard and improve its production efficiency and quali-ty.This article explores the effects of fiber size and ratio on ultra-thin fiberboard through screening and recombina-tion.The results show that under the same hot pressing conditions,the higher the content of coarse fibers,the higher the water absorption thickness expansion rate of ultra-thin fiberboard.The static bending strength and elastic modulus of ultra-thin fiberboard prepared with single size fibers increase with the increase of fiber size.Ultrathin fi-berboards prepared with mixed fibers of different sizes reach their maximum static bending strength and elastic modu-lus when the ratio of coarse fibers,medium length fibers,and fine fibers is 6:3:1.
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