Wet-laid nonwoven fabric sheet

Abstract

A wet-laid nonwoven fabric sheet includes at least three types of thermoplastic fibers having different fiber diameters, in which the wet-laid nonwoven fabric sheet has a fiber diameter ratio (R/r) of a fiber diameter R of a fiber having a maximum fiber diameter to a fiber diameter r of a fiber having a minimum fiber diameter of 30≤R/r≤150, an average pore size of 0.10 μm to 15 μm, and a maximum frequency of a pore size distribution of 70% or more.

1 - 6 . (canceled) 
     
     
         7 . A wet-laid nonwoven fabric sheet, comprising:
 at least three types of thermoplastic fibers having different fiber diameters, wherein the wet-laid nonwoven fabric sheet has a fiber diameter ratio (R/r) of a fiber diameter R of a fiber having a maximum fiber diameter to a fiber diameter r of a fiber having a minimum fiber diameter of 30≤R/r≤150, an average pore size of 0.10 μm to 15 μm, and a maximum frequency of a pore size distribution of 70% or more.   
     
     
         8 . The wet-laid nonwoven fabric sheet according to  claim 7 , wherein the fiber diameter r is 0.10 μm to 1.0 μm. 
     
     
         9 . The wet-laid nonwoven fabric sheet according to  claim 7 , having a porosity of 70% or more. 
     
     
         10 . The wet-laid nonwoven fabric sheet according to  claim 7 , having a basis weight of 10 g/m 2  to 500 g/m 2 . 
     
     
         11 . The wet-laid nonwoven fabric sheet according to  claim 7 , having a ratio (L/r) of a fiber length L to the fiber diameter r in the fiber having the minimum fiber diameter of 3,000 to 6,000. 
     
     
         12 . A textile product at least partially comprising the wet-laid nonwoven fabric sheet according to  claim 7 .