Patent ID: 7384583

Claim:
A method for manufacturing spun-bonded nonwoven fabrics, which comprises: quenching a multiple number of continuous filaments melt-spun through spinning nozzles with quench air fed to quenching chamber, drawing the filaments with drawing air, and depositing the filaments on a moving collector surface, wherein the quench air fed to the quenching chamber is divided into at least 2 streams in a vertical direction, and an air velocity ratio (V 1 /V n ) of the quench air velocity in the uppermost stream (V 1 ) to that in the lowermost stream (V n ) is in range of 0.01≦V 1 /V n <0.7, and a velocity V m of the quench air in a m th stream (wherein n≧m≧2) from a top satisfies V m ≧V m−1 , wherein the quench air works as the drawing air at a drawing section formed as a narrowed path, and wherein the temperature in the lowermost stream is higher by at least 10° C. than that in the uppermost stream.