Fibrillated rayon-containing, water-decomposable fibrous sheet
AssigneeUni-Charm Corporation
InventorsNaohito Takeuchi, Jyoji Shimizu, Kazuya Okada, Toshiyuki Tanio, Takayoshi Konishi
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Abstract
Conventional water-decomposable fibrous sheets for cleaning sheets capable of being disposed of in toilets and others do not have well-balanced decomposability in water and strength. The water-decomposable fibrous sheet containing from 5 to 100% by mass of fibrillated rayon having a fiber length of at most 10 mm and having a degree of beating of at most 700 cc, optionally along with other fibers having a length of at most 10 mm, has good decomposability in water and high wet strength. When subjected to water-jetting treatment, it becomes more bulky to have a soft feel.
Claims13
A water-decomposable fibrous sheet, comprising from 3 to 20% by mass of fibrillated rayon comprising primary fibers and microfibers extending therefrom, and a balance being non-fibrillated rayon and pulp having a length of at most 10 mm, wherein:
- primary fibers have a length in a range of from 2.5 to 6.5 mm at a peak of mass distribution thereof;
- microfibers having a length of at most 1 mm account for from 0.1 to 50% by mass of a self-weight of the fibrillated rayon;
- and the microfibers are hydroentangled with each other or with other fibers.
Dependencies are inferred from the claim text.