Nonwoven fabric containing ultra-fine fibers, leather-like sheet, and production methods thereof
AssigneeToray Industries, Inc.
InventorsTomoyuki Horiguchi, Kyoko Yokoi, Kentaro Kajiwara
Life of this patent
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Abstract
To provide a nonwoven fabric containing ultra-fine fibers suitable as a leather-like sheet, and also a leather-like sheet with an excellent compactness. A nonwoven fabric containing ultra-fine fibers, characterized in that it contains staple fibers with a fiber fineness of 0.0001 to 0.5 decitex and a fiber length of 10 cm or less, and has a weight per unit area of 100 to 550 g/m2, an apparent density of 0.280 to 0.700 g/cm3, a tensile strength of 70 N/cm or more, and a tear strength of 3 to 50 N.
Claims15
A nonwoven fabric, containing ultra-fine fibers and does not contain an elastomer, which contains staple fibers with a fiber fineness of 0.0001 to 0.5 decitex and a fiber length of 2 cm to 10 cm and at least substantially all of the ultra-fine fibers are uniformly entangled with each other such that there is substantially no entanglement between bundles of ultra-fine fibers in the thickness direction, and has a weight per unit area of 100 to 550 g/m2, an apparent density of 0.280 to 0.700 g/cm3, a tensile strength of 70 N/cm or more, a 10% modulus in the length direction is 8 N/cm or more and a tear strength of 3 to 50 N.
An artificial leather sheet which contains a dyed nonwoven fabric containing ultra-fine fibers with a fiber fineness of 0.0001 to 0.5 decitex, a fiber length of 2 cm to 10 cm, and at least substantially all of the ultra-fine fibers are uniformly entangled with each other such that there is substantially no entanglement between bundles of ultra-fine fibers in the thickness direction, a weight per unit area of 100 to 550 g/m2 and an apparent density of 0.230 to 0.700 g/cm3, a tensile strength of 70 N/cm or more, and has a tear strength of 3 to 50 N and satisfies the following formula:
- Tensile strength (N/cm)≧0.45×Weight per unit area (g/m2)−40;
- and which does not contain an elastomer.
Dependencies are inferred from the claim text.