WATER DISINTEGRABLE FIBER SHEET HAVING HIGH STRENGTH AGAINST SURFACE FRICTION AND METHOD FOR PRODUCING THE SAME SHEET

摘要

PROBLEM TO BE SOLVED: To eliminate the problem that a cleaning sheet made of a water disintegrable fiber sheet which is conventionally flushed and discarded lacks balance between water disintegrability and strength. SOLUTION: A water disintegrable fiber sheet is formed out of fibers comprising >=3 mass % of fibrillated rayon composed of a main body with a specific fiber length and fibrils extending from the main body and having a beating degree of <=700 cc. The fibrils extending from the fibrillated rayon are interlaced with at least either of other fibril and other fiber, and the fiber sheet has a dry surface-friction strength of >=3 times when measured by the JIS P-8136 abrasion resistance testing method. The existence of fibrils leads to improvement in frictional strength on the surface of the fiber sheet.