Fibrous nonwoven fabric

Abstract

Provided is a fibrous nonwoven fabric including a resin composition (C) containing a high-crystalline polyolefin (A) and a low-crystalline polyolefin (B), wherein a half-crystallization time (t c ) of the resin composition (C) is 1.2 to 2.0 times a half-crystallization time (t a ) of the high-crystalline polyolefin (A).

1 . A fibrous nonwoven fabric comprising a resin composition (C) comprising a high-crystalline polyolefin (A) and a low-crystalline polyolefin (B), the fibrous nonwoven fabric satisfying the following conditions (1) and (2):
 (1) a half-crystallization time (t a ) of the high-crystalline polyolefin (A) and a half-crystallization time (t b ) of the low-crystalline polyolefin (B) satisfy a relation of t a <t b ; and   (2) a half-crystallization time (t c ) of the resin composition (C) is 1.2 to 2.0 times the half-crystallization time (t a ) of the high-crystalline polyolefin (A).   
     
     
         2 . The fibrous nonwoven fabric according to  claim 1 , wherein a fineness of fibers constituting the fibrous nonwoven fabric is 0.2 to 1.3 deniers. 
     
     
         3 . The fibrous nonwoven fabric according to  claim 2 , wherein the fineness of fibers constituting the fibrous nonwoven fabric is 0.2 to 0.8 deniers. 
     
     
         4 . The fibrous nonwoven fabric according to  claim 1 , wherein an initial elastic modulus of the high-crystalline polyolefin (A) is 500 to 2,000 MPa, and an initial elastic modulus of the low-crystalline polyolefin (B) is 5 MPa or more and less than 500 MPa. 
     
     
         5 . The fibrous nonwoven fabric according to  claim 1 , wherein when molding the fibrous nonwoven fabric, molding is performed in a discharge amount per hole of 0.1 to 0.5 g/min. 
     
     
         6 . A spunbonded nonwoven fabric constituted of fibers having a fineness of 0.2 to 1.0 denier. 
     
     
         7 . The fibrous nonwoven fabric according to  claim 2  wherein an initial elastic modulus of the high-crystalline polyolefin (A) is 500 to 2,000 MPa, and an initial elastic modulus of the low crystalline polyolefin (B) is 5 MPa or more and less than 500 MPa. 
     
     
         8 . The fibrous nonwoven fabric according to  claim 3 , wherein an initial elastic modulus of the high-crystalline polyolefin (A) is 500 to 2,000 MPa, and an initial elastic modulus of the low crystalline polyolefin (B) is 5 MPa or more and less than 500 MPa. 
     
     
         9 . The fibrous nonwoven fabric according to  claim 2 , wherein when molding the fibrous nonwoven fabric, molding is performed in a discharge amount per hole of 0.1 to 0.5 g/min. 
     
     
         10 . The fibrous nonwoven fabric according to  claim 3 , wherein when molding the fibrous nonwoven fabric, molding is performed in a discharge amount per hole of 0.1 to 0.5 g/min. 
     
     
         11 . The fibrous nonwoven fabric according to  claim 4 , wherein when molding the fibrous nonwoven fabric, molding is performed in a discharge amount per hole of 0.1 to 0.5 g/min.