Highly absorbent composite and method of making the same

摘要

A composite structure mainly composed of hydratable fine fibers in the form of microfibril and a water swellable solid body, the fibers being obtained from cellulose or derivatives thereof, and at least part of the surface of the solid body is covered with the fine fibers. The absorbent composite can be formed in various form of, for example, particle, pellet, sheet and the like, especially of a sheet type with a supporting sheet of a non-woven fabric. The present invention further provides a method of making the composite structure.

主权项

1. A method of making an absorbent sheet comprising the steps of:
preparing a three component dispersion slurry by adding and dispersing a short-cut staple fiber component and absorbent polymer particles in a dispersion liquid where hydratable fine fibers in the form of microfibril are dispersed in a dispersion medium, the short-cut staple fiber component having longer fiber length than average diameter of the absorbent polymer particles; forming a slurry layer by spreading said three component dispersion slurry on at least either surface of a supporting sheet; and removing said dispersion medium from said slurry layer and then drying, wherein the ratio (P/Q) of weight (P) of said hydratable fine fibers in the form of microfibril to weight (Q) of said short-cut staple fiber component is in the range of from 1/5 to 5/1.