US5298315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite nonwoven fabric
Assignee: Asahi Kasei Corp
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Filing: 1993-06-22
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Granted: 1994-03-29
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Expires: 2013-06-22
Abstract
Abstract A composite nonwoven fabric comprising a staple fiber nonwoven fabric A constituted with a staple fiber of 0.3 denier or less and a staple fiber of 0.5 denier or more, the content of which is determined to a specific value, and a filament nonwoven fabric B. With regard to the fiber arrangement of the staple fiber in the staple fiber nonwoven fabric A, the proportion of a parallel component thereof against a surface of the nonwoven fabric is high, and the staple fiber nonwoven fabric A and the filament nonwoven fabric B are interlaced with each other near the boundary area therebetween, and the staple fiber of the staple fiber nonwoven fabric A is not deeply inserted. The composite nonwoven fabric has superior air permeability and water resistance and when deformation caused by bending or compression occurs, a leakage of liquid is not likely to occur.
Inventors
- 👤 Minoru Fukui
- 👤 Toshiko Kiyotaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:53
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/08; B32B5/022; D; D04; D04H; D04H5/00; D04H5/06; D04H5/08; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2262/06; B32B2262/062; B32B2307/00; B32B2307/70; B32B2307/724; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10S428/913; Y10T; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/66; Y10T442/663; Y10T442/666; Y10T442/668
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
A composite nonwoven fabric comprising a staple fiber nonwoven fabric (A) having the following constitutions (1) to (3) and a filament nonwoven fabric (B) formed such that filaments are partially bonded with each other, wherein a part of the staple fibers constituting the staple fiber nonwoven fabric (B) and interlaced with the filaments constituting the filament nonwoven fabric (B) so as to produce a layered body of the staple fiber nonwoven fabric (A) and the filament nonwoven fabric (B), and the number N of the staple fibers inserted to a depth of one to two or more of the thickness of the filament nonwoven fabric (B) in a region having a length of 500 μm in an optional cross section of the composite nonwoven fabric is 20 or less; (1) F+G≧50% by weight 1/7≦F/G≦4/3 wherein F: ratio of a staple fiber having a fineness of 0.3 denier or less in all the staple fibers G: ratio of a staple fiber having a fineness of 0.5 denier or more in all the staple fibers (2) Weight per unit area: 10 g/m 2 to 40 g/m 2 (3) Mean orientation degree (Z) of the staple fibers: 2.0 to 10.
Claim 2
Dependent Claim
197 words
A composite nonwoven fabric comprising a staple fiber nonwoven fabric (A) having the following constitutions (1) to (3) and a filament nonwoven fabric (B) formed such that filaments are partially bonded with each other, wherein a part of the staple fibers constituting the staple fiber nonwoven fabric (B) and interlaced with the filaments constituting the filament nonwoven fabric (B) so as to produce a layered body of the staple fiber nonwoven fabric (A) and the filament nonwoven fabric (B), and the number N of the staple fibers inserted to a depth of one to two or more of the thickness of the filament nonwoven fabric (B) in a region having a length of 500 μm in an optional cross section of the composite nonwoven fabric is 20 or less; (1) F+G≧50% by weight 1/7≦F/G≦4/3 wherein F: ratio of a staple fiber having a fineness of 0.3 denier or less in all the staple fibers G: ratio of a staple fiber having a fineness of 0.5 denier or more in all the staple fibers (2) Weight per unit area: 10 g/m 2 to 40 g/m 2 (3) Mean orientation degree (Z) of the staple fibers: 2.0 to 10.
Claim 3
Dependent Claim
25 words
A composite nonwoven fabric according to claim 1, wherein an apparent density of the staple fiber nonwoven fabric (A) is 0.1 g/cm 2 or more.
Claim 4
Dependent Claim
40 words
A composite nonwoven fabric according to claim 1, wherein a mean elongation of the filament nonwoven fabric (B) is 40% or less; wherein; the mean elongation is a value obtained by averaging breaking elongations measured in two mutual perpendicular directions.
Claim 5
Dependent Claim
46 words
A composite nonwoven fabric according to claim 1, wherein the staple fiber nonwoven fabric (A) is composed of at least a regenerated cellulose group fiber and the ratio of the regenerated cellulose group fiber is 50% by weight or more and 80% by weight or less.
Claim 6
Dependent Claim
52 words
A composite nonwoven fabric according to claim 1, wherein the staple fiber nonwoven fabric (A) is composed of a regenerated cellulose group fiber and a polyester group fiber, and the ratio of the polyester group fiber is one to three or more and one or less against the regenerated cellulose group fiber.
Claim 7
Dependent Claim
46 words
A composite nonwoven fabric according to claim 1, wherein the staple fiber nonwoven fabric (A) is composed of at least a fibrillated acrylic group pulp, and the ratio of the fibrillated acrylic group pulp is 5% by weight or more and 15% by weight or less.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |