Patent US4107374A successfully refreshed from Google Patents.
US4107374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabric usable as a substratum sheet for artificial leather
Assignee: Asahi Kasei Corp
•
Filing: 1975-09-11
•
Granted: 1978-08-15
•
Expires: 1995-09-11
Abstract
Abstract A non-woven fabric usable as a substratum sheet for artificial leather having a relatively high flexural rigidity is prepared by a process in hich fibrous bundles, each consisting of a plurality of extremely fine filaments or fibers having a denier of 0.005 to 0.5, is provided while allowing the filaments or fibers to spontaneously adhere to each other without using an adhesive, the fibrous bundles are massed into the form of sheet or web, and the sheet or web is then subjected to a non-woven fabric forming operation in which the fibrous bundles are entangled with each other.
Inventors
- 👤 Tetsuhiro Kusunose
- 👤 Tsukasa Shima
- 👤 Hiroshi Henmi
- 👤 Sadahiko Yasui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:58
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/10; D04H3/16; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/64; Y10T442/68; Y10T442/682; Y10T442/684; Y10T442/688; Y10T442/689; Y10T442/69
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A non-woven fabric usable as a substratum sheet of artificial leathers, comprising numerous fibrous bundles, each comprising a plurality of extremely fine filaments or fibers having a denier of 0.005 to 0.5 and spontaneously adhered to each other side-by-side without using an adhesive, a portion of said fibrous bundles being divided into thin fibrous bundles and individual filaments or fibers, said thin fibrous bundles, said individual filaments or fibers and the remaining fibrous bundles being entangled with each other to form a body of non-woven fabric.
Claim 2
Dependent Claim
86 words
A non-woven fabric usable as a substratum sheet of artificial leathers, comprising numerous fibrous bundles, each comprising a plurality of extremely fine filaments or fibers having a denier of 0.005 to 0.5 and spontaneously adhered to each other side-by-side without using an adhesive, a portion of said fibrous bundles being divided into thin fibrous bundles and individual filaments or fibers, said thin fibrous bundles, said individual filaments or fibers and the remaining fibrous bundles being entangled with each other to form a body of non-woven fabric.
Claim 3
Dependent Claim
20 words
A non-woven fabric as claimed in claim 1, to which each fibrous bundle comprises regenerated cellulose rayon filaments or fibers.
Claim 4
Dependent Claim
17 words
A non-woven fabric as claimed in claim 2, in which said regenerated cellulose rayon is cuprammonium rayon.
Claim 5
Dependent Claim
17 words
A non-woven fabric as claimed in claim 2, in which said regenerated cellulose rayon is viscose rayon.
Claim 6
Dependent Claim
25 words
A non-woven fabric as claimed in claim 3, in which said cuprammonium rayon fibrous bundle has a flexural rigidity of 15 to 500 mg/100 denier.
Claim 7
Dependent Claim
20 words
A non-woven fabric as claimed in claim 1, in which each fibrous bundle comprises a synthetic polymer filament or fibers.
Claim 8
Dependent Claim
44 words
A non-woven fabric as claimed in claim 1, in which the sum weight of the individual filaments or fibers and the thin fibrous bundles, each composed of 5 individual filaments or fibers or less, is in an amount of 5 to 95% by weight.
Claim 9
Dependent Claim
90 words
An artificial leather comprising a non-woven fabric impregnated with an elastic synthetic polymer, said non-woven fabric comprising numerous fibrous bundles, each comprising a plurality of extremely fine filaments or fibers having a denier of 0.005 to 0.5 spontaneously adhered to each other side-by-side without using an adhesive, a portion of said fibrous bundles being divided into thin fibrous bundles and individual filaments or fibers, said thin fibrous bundles, said individual filaments or fibers and the remaining fibrous bundles being entangled with each other to form a body of non-woven fabric.
Claim 10
Dependent Claim
90 words
An artificial leather comprising a non-woven fabric impregnated with an elastic synthetic polymer, said non-woven fabric comprising numerous fibrous bundles, each comprising a plurality of extremely fine filaments or fibers having a denier of 0.005 to 0.5 spontaneously adhered to each other side-by-side without using an adhesive, a portion of said fibrous bundles being divided into thin fibrous bundles and individual filaments or fibers, said thin fibrous bundles, said individual filaments or fibers and the remaining fibrous bundles being entangled with each other to form a body of non-woven fabric.
References Cited (Backward Citations)
US3554854A
Cited
US3932687A
Cited
US3706613A
Cited
US3716614A
Cited
US3914501A
Cited
US3705226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |