Nonwoven fabric, sanitary material and method of manufacturing nonwoven fabric

Abstract

A nonwoven fabric comprising a fiber, and a ratio of daughter lamellae is 0.10 or less.

1 . A nonwoven fabric comprising a fiber,
 wherein a ratio of daughter lamellae is 0.10 or less.   
     
     
         2 . The nonwoven fabric according to  claim 1 , wherein the ratio of daughter lamellae is 0.09 or less. 
     
     
         3 . The nonwoven fabric according to  claim 1 , wherein a fineness of the fiber is 0.8 d or less. 
     
     
         4 . The nonwoven fabric according to  claim 3 , wherein the fineness of the fiber is 0.6 d or less. 
     
     
         5 . The nonwoven fabric according to  claim 1 , wherein the fiber contains a thermoplastic resin. 
     
     
         6 . The nonwoven fabric according to  claim 5 , wherein the thermoplastic resin contains a propylene homopolymer. 
     
     
         7 . The nonwoven fabric according to  claim 6 , wherein a melt flow rate (MFR) of the propylene homopolymer is from 10 g/10 min to 100 g/10 min. 
     
     
         8 . The nonwoven fabric according to  claim 1 , comprising a spunbond nonwoven fabric. 
     
     
         9 . A sanitary material, comprising the nonwoven fabric according to  claim 1 . 
     
     
         10 . A method of manufacturing a nonwoven fabric comprising discharging a thermoplastic resin or a resin composition containing the thermoplastic resin from a nozzle, supplying a cooling air to filaments made of the discharged thermoplastic resin or resin composition, and melt-spinning the filaments,
 wherein the thermoplastic resin has a mesophase ratio of 22% or more, and   wherein a ratio of cooling air volume per 1 m width (m 3 /h/m) with respect to discharge volume per nozzle hole (g/min) is from 10,000 to 40,000.   
     
     
         11 . The method of manufacturing a nonwoven fabric according to  claim 10 , wherein the ratio of cooling air volume per 1 m width (m 3 /h/m) with respect to discharge volume per nozzle hole (g/min) is from 15,000 to 40,000. 
     
     
         12 . The method of manufacturing a nonwoven fabric according to  claim 11 , wherein the ratio of cooling air volume per 1 m width (m 3 /h/m) with respect to discharge volume per nozzle hole (g/min) is from 30,000 to 40,000. 
     
     
         13 . The method of manufacturing a nonwoven fabric according to  claim 10 , wherein the nonwoven fabric includes a spunbond nonwoven fabric. 
     
     
         14 . The method of manufacturing a nonwoven fabric according to  claim 10 , wherein a temperature of the cooling air is from 15° C. to 30° C.