Rayon yarn for wet-laid nonwoven fabric and method for producing same, wet-laid nonwoven fabric and method for producing same, and hydrolyzable paper

The present invention pertains to a rayon yarn for use in a wet-laid nonwoven fabric and having an average crimp rate of 16-45%, inclusive. This rayon yarn for use in a wet-laid nonwoven fabric is produced by using a method for producing a rayon yarn by discharging viscose from a spinning nozzle into a spinning bath, forming a line of yarn by solidifying and regenerating the viscose, and withdrawing, extending, and scouring the line of yarn, wherein the extension is separated into two stages of extension, the rate of extension in the first extension stage is 30% or less, and the rate of extension in the second extension stage is 3.0% or less. The present invention further pertains to a wet-laid nonwoven fabric containing the abovementioned rayon yarn for use in a wet-laid nonwoven fabric, and a hydrolyzable paper containing the abovementioned wet-laid nonwoven fabric. The present invention provides: a rayon yarn for use in a wet-laid nonwoven fabric and exhibiting prescribed crimping, favorable water dispersion properties when dry, and interlacing properties when forming a nonwoven fabric; a method for producing the same; a wet-laid nonwoven fabric; a method for producing the same; and a hydrolyzable paper.