Abstract: A fiber nonwoven fabric includes a fiber containing an aromatic polyether ketone, and a coefficient of variation in a fiber diameter of the fiber is 100% or less.

Abstract: A nonwoven fabric, including fibers, in which the fibers have an elongational viscosity, as measured under conditions at an elongational strain rate of 2.5×102 (1/s) and a temperature of 160° C., of from 430 Pa·s to 1200 Pa·s, and a ratio of the elongational viscosity (Pa·s) to a shear viscosity (Pa·s) of the fiber, as measured under conditions at a shear strain rate of 2.5×102 (1/s) and a temperature of 160° C., is from 35 to 65.

Abstract: A melt-blown nonwoven fabric includes polybutylene terephthalate, in which an intrinsic viscosity of the melt-blown nonwoven fabric is 0.45 dl/g or more and 0.60 dl/g or less.

Abstract: A nonwoven fabric, including fibers, in which the fibers have an elongational viscosity, as measured under conditions at an elongational strain rate of 2.5×102 (1/s) and a temperature of 160° C., of from 430 Pa·s to 1200 Pa·s, and a ratio of the elongational viscosity (Pa·s) to a shear viscosity (Pa·s) of the fiber, as measured under conditions at a shear strain rate of 2.5×102 (1/s) and a temperature of 160° C., is from 35 to 65.

Abstract: Provided is a melt-blown nonwoven fabric including a propylenic polymer that shows at least one peak top at a position of a molecular weight of 20,000 or higher and at least one peak top at a position of a molecular weight of less than 20,000 in a discharge curve obtained by gel permeation chromatography, that has an intrinsic viscosity [?] of from 0.35 dl/g to 0.50 dl/g.

Abstract: Provided is a melt-blown nonwoven fabric including a propylenic polymer that shows at least one peak top at a position of a molecular weight of 20,000 or higher and at least one peak top at a position of a molecular weight of less than 20,000 in a discharge curve obtained by gel permeation chromatography, and has an intrinsic viscosity [?] of from 0.50 (dl/g) to 0.75 (dl/g).

Abstract: A meltblown nonwoven fabric is provided having thermoplastic resin fibers having an average fiber diameter of 0.1 to 10 ?m, a bulk density of not more than 36 kg/m3 and an air permeability, as measured by a Frazier type method at basis weight of 200 g/m2, of 3 to 100 cc/cm2/sec. The meltblown nonwoven fabric has a low bulk density and is excellent in sound absorption performance, oil adsorption performance, heat insulation performance, dust collection performance and filtration performance. Since the meltblown nonwoven fabric can be formed from one kind of a resin composition, it can be simply and easily produced as compared with the case of using mixed fibers or conjugated fibers formed from many kinds of resins, and the resulting meltblown nonwoven fabric can have uniformity and no variability of properties.

Abstract: An object of the invention is to obtain nonwoven fabric laminates which may be hot embossed to maintain high wear resistance (fuzz resistance) without any decrease in waterproofness (barrier properties) and which have excellent tensile strength and flexibility. The invention provides a nonwoven fabric laminate including a meltblown nonwoven fabric (A) and a spunbond nonwoven fabric stacked on at least one surface of the meltblown nonwoven fabric, the meltblown nonwoven fabric including a fiber of an ethylene polymer resin composition containing an ethylene polymer (a) and an ethylene polymer wax (b) having a weight average molecular weight of less than 6,000 and a softening point exceeding 110° C., the spunbond nonwoven fabric including a fiber formed form an ethylene polymer (y), or from an ethylene polymer (y) and a polyester polymer (x).