Polyvinyl-alcohol-based fiber, fiber structure, and method for manufacturing same

Abstract

A polyvinyl alcohol fiber that is excellent in water absorption properties, water solubility and mechanical strength; a fiber structure including the polyvinyl alcohol fiber; and a method for producing the polyvinyl alcohol fiber are provided. The polyvinyl alcohol fiber includes 1 mol % or more of at least one functional group selected from a sulfonic acid group, a sulfonate group, a maleic acid group, an itaconic acid group, an acrylic acid group, and a methacrylic acid group. The polyvinyl alcohol fiber has a degree of cross-linking of 0% and a tensile strength of 3 cN/dtex or more.

Dependencies are inferred from the claim text.