| abstract |
Provided are: a method for producing a spun-bonded nonwoven fabric having superior flexibility, having favorable drape including feel, and promoting bleedout of an additive; and a spun-bonded nonwoven fabric obtained by the production method. Specifically, provided are: (1) a method for producing a spun-bonded nonwoven fabric by means of annealing processing a spun-bonded nonwoven fabric formed using a crystalline resin composition (I) containing 1-50 mass% of a low-crystalline olefinic polymer (a) having a modulus of elasticity of 10-450 MPa, a high-crystalline olefinic polymer (b) (the amount of component (b) contained is the remaining portion) having a modulus of elasticity of 500-2000 MPa, and 1-20,000 mass ppm of an additive (c); (2) a method for producing a spun-bonded nonwoven fabric by means of annealing processing a spun-bonded nonwoven fabric formed using a core-sheath composite fiber having as the sheath component the crystalline resin composition (I), and having as the core component a crystalline resin composition (II) containing a high-crystalline olefininc polymer (b') having a modulus of elasticity of 500-2,000 MPa; and a spun-bonded nonwoven fabric obtained by the production methods. |