Nonwoven fabric and method for producing same
AssigneesJnc Corporation, Jnc Fibers Corporation
InventorHirokazu Terada
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Abstract
The present invention addresses the problem of providing a nonwoven fabric that is bulky, has excellent softness, and has high strength. Provided is a nonwoven fabric in which the points at which heat fusible composite fibers intersect with each other are fused by heat. The nonwoven fabric has a high-density-side surface layer where the fiber density is 5 to 20 fibers/mm2. The ratio of the fiber density of the high-density-side surface layer and the fiber density of a low-density-side surface layer of the nonwoven fabric is 1.4 or less. The strength per unit basis weight of the nonwoven fabric is 0.40 N/50 mm or greater.
Claims8
A nonwoven fabric in which points at which heat fusible composite fibers intersect with each other are fused by heat, the nonwoven fabric comprising:
- a high-density-side surface layer having a fiber density of 5 to 20 fibers/mm2,
- wherein a ratio of the fiber density of the high-density-side surface layer and a fiber density of a low-density-side surface layer of the nonwoven fabric is 1.4 or less, and
- a strength per unit basis weight of the nonwoven fabric is 0.40 N/50 mm or greater, wherein a specific volume is 100 cm3/g or greater.
A method for producing a nonwoven fabric, the method comprising:
- forming a web containing heat fusible composite fibers;
- and
- fusing points at which the heat fusible composite fibers intersect with each other by heat under no pressure using superheated steam gas,
- wherein a blowing pressure of the superheated steam gas is less than 0.1 kPa, and a blowing speed of the superheated steam gas is less than 0.1 m/minute.
Dependencies are inferred from the claim text.