Highly absorbent composite compositions, absorbent sheets provided with the compositions, and process for producing the same
AssigneeDSG International Limited
InventorsMigaku Suzuki, Ryoichi Matsumoto, Shingo Mori
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Abstract
A composite structure mainly composed of hydratable fine fibers in the form of microfibril and a water swellable solid body, the fine fibers being obtained from cellulose or a derivative 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.
Claims31
An absorbent sheet which comprises an absorbent layer consisting of an absorbent composite comprising hydratable fine fibers in the form of microfibril obtained from cellulose or a derivative thereof and absorbent polymer particles,
- and a sheet supporting said absorbent layer,
- wherein the ratio of said hydratable fine fibers in the form of microfibril to said absorbent polymer particles is 0.3 to 20 percent by weight and said absorbent polymer particles are bonded together by said hydratable fine fibers in the form of microfibril.
An absorbent sheet comprising a liquid pervious supporting sheet, and an absorbent layer consisting of
- an absorbent composite comprising hydratable fine fibers in the form of microfibril and absorbent polymer particles, wherein said absorbent layer is bonded on at least one surface of said supporting sheet and forms a plurality of highly absorbing areas which have an absorbing capacity higher than the remaining areas and are distributed in a desired pattern on said liquid pervious supporting sheet and
- the ratio of said hydratable fine fibers in the form of microfibril to said absorbent polymer particles is 0.3 to 20 percent by weight.
An absorbent sheet having a supporting sheet and an absorbent layer provided on at least one surface of said supporting sheet, said absorbent layer comprising hydratable fine fibers in the form of microfibril, absorbent polymer particles, and a short-cut staple fiber component having a fiber length longer than the average diameter of said absorbent polymer particles, whereby said absorbent sheet has an improved dimensional stability when wet or swollen
- wherein the ratio of said hydratable fine fibers in the form of microfibril to said absorbent polymer particles is 0.3 to 20 percent by weight.
Dependencies are inferred from the claim text.