US4539255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture-permeable waterproof fabric
Assignee: KANEBO Ltd 5-17-4 SUMIDA SUMIDA-KU TOKYO JAPAN A CORP OF JAPAN
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Filing: 1983-09-16
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Granted: 1985-09-03
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Expires: 2003-09-16
Abstract
Abstract The moisture-permeable waterproof fabric according to the invention comprises a polyamino acid modified polyurethane film having a thickness of 2 to 20 microns and a fabric bonded on the polyurethane film by a polyurethane adhesive in an amount of at least 10 g/m 2 . The polyamino acid modification ratio of the polyurethane film is within the range of 2 to 20%. The total amount of the adhesive and the polyurethane film is not more than 50 g/m 2 .
Inventors
- 👤 Keishi Sato
- 👤 Takeshi Nishida
- 👤 Toji Kamiya
- 👤 Yutaka Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/40; B32B7/00; B32B7/04; B32B7/12; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; B32B2307/00; B32B2307/70; B32B2307/726; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249979; Y10T428/24998; Y10T428/249982; Y10T428/249984; Y10T428/249985; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31562; Y10T428/31565; Y10T428/31591; Y10T442/00; Y10T442/30; Y10T442/3854
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A moisture-permeable waterproof fabric having a water resistance measured by JIS D-1092 of more than 2000 mm and a moisture-permeability measured by JIS K-6328 of at least 800 g/m 2 ·24 hr, which comprises a polyamino acid modified polyurethane film having a thickness of 2 to 20 microns and a fabric bonded on said polyurethane film by a polyurethane adhesive in an amount of at least 10 g/m 2 , the polyamino acid modification ratio of said polyurethane film being within the range of 2 to 20% and the total amount of said adhesive and said polyurethane film being not more than 50 g/m 2 .
Claim 2
Dependent Claim
106 words
A moisture-permeable waterproof fabric having a water resistance measured by JIS D-1092 of more than 2000 mm and a moisture-permeability measured by JIS K-6328 of at least 800 g/m 2 ·24 hr, which comprises a polyamino acid modified polyurethane film having a thickness of 2 to 20 microns and a fabric bonded on said polyurethane film by a polyurethane adhesive in an amount of at least 10 g/m 2 , the polyamino acid modification ratio of said polyurethane film being within the range of 2 to 20% and the total amount of said adhesive and said polyurethane film being not more than 50 g/m 2 .
Claim 3
Dependent Claim
31 words
A moisture-permeable waterproof fabric as defined in claim 1, wherein said adhesive comprises a polyamino acid modified polyurethane in which the modification ratio is within the range of 2 to 20%.
Claim 4
Dependent Claim
27 words
A moisture-permeable waterproof fabric as defined in claim 1, wherein the polyamino acid modification ratio of said polyurethane film is within the range of 3 to 12%.
Claim 5
Dependent Claim
21 words
A moisture-permeable waterproof fabric as defined in claim 1, wherein said polyurethane film has a thickness of 3 to 10 microns.
Claim 6
Dependent Claim
52 words
A moisture-permeable waterproof fabric as defined in claim 1, wherein said polyurethane film is made from a mixture of at least one polyurethane modified with polyamino acid in a modification ratio of 5 to 50% and at least one polyurethane modified with polyamino acid in a modification ratio of 0 to 5%.
Claim 7
Dependent Claim
30 words
A moisture-permeable waterproof fabric as defined in claim 1, wherein fibers of said fabric in the part bonded with said polyurethane film are crimpy yarn consisting of a thermoplastic polymer.
Claim 8
Dependent Claim
29 words
A moisture-permeable waterproof fabric as defined in claim 1, wherein said adhesive only adheres on the surface of said fabric so that said fabric is maintained to be porous.
References Cited (Backward Citations)
US3663266A
Cited
JPS5227681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |