| abstract |
An ultrafine fiber sheet having a small fiber diameter, a functional group introduced on the fiber surface, a durable adsorptivity to a target chemical substance, excellent flexibility, and excellent mechanical strength, and production thereof Methods and uses thereof are provided. A sheet comprising ultrafine fibers having an average fineness of 0.5 dtex or less, wherein water-soluble thermoplastic PVA is present in the sheet structure, and a PVA hydroxyl group is modified by 1 to 80 mol%. It is a fiber sheet. [Selection] Figure 1 |