Patent ID: 9200392
Filing Date: 2015-12-01
Classification: B01D,B32B,D01D,D04H,H01M,Y02E,Y10T

Abstract:
1. A production process for a melt-blown nonwoven fabric, comprising spinning out a molten thermoplastic resin through a nozzle having a number of holes lined up, said holes having a diameter of 0.05 mm to 0.4 mm, said molten resin having been forcedly fed to a melt-blowing die, and accumulating fibers on a moving collection plate, said fibers being obtained by drawing and thinning the molten resin by air gushed out from slits provided so as to interpose a line of the holes therebetween, said air having a temperature not lower than 280° C. and a flow rate of 200 Nm 3 /hr/m to 1000 Nm 3 /hr/m, wherein: a cooling fluid of not higher than 30° C. is horizontally fed along a nozzle surface from side surfaces of outlets of the slits from which the air is gushed out, and through an attachment to introduce the cooling fluid for cooling the spun thermoplastic resin fibers which has been mounted on the tip of the melt-blowing die without any space between the attachment and the tip of the melt-blowing die, to cool the spun thermoplastic resin fibers, said surfaces facing away from the line of the holes.