US4612228A
Expired / Lapsed
US
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Ultrafine fiber entangled sheet
Assignee: Toray Industries Inc
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Filing: 1984-04-23
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Granted: 1986-09-16
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Expires: 2004-04-23
Abstract
Abstract An artificial grain leather sheet free of rubber-like elasticity and characterized by excellent softness and strength composed of ultrafine super-entangled synthetic fibers having a denier of less than about 0.5 and a resin. The sheet has a body portion and a grain surface portion wherein the ultrafine fibers are supertangled at a multiplicity of entangling points, with the average distance between entangling points being less than about 200 microns and the fiber density coefficient near the surface being greater than about 30.
Inventors
- 👤 Hiroyasu Kato
- 👤 Kenkichi Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:09
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/48; D04H1/49; D04H1/42; D04H1/4382; D04H1/43825; D04H1/4383; D04H1/43838; D04H1/58; D04H1/64; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/64; Y10T442/682; Y10T442/684; Y10T442/688
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
86 words
Artificial grain leather comprising a sheet composed of a resin and a multiplicity of entangled synthetic fibers having a denier of less than about 0.5, said sheet having a body portion and having a grain surface portion wherein the fibers are superentangled at a multiplicity of entangling points, the average distance between the entangling points in said grain surface portion being less than about 200 microns, and the fiber density coefficient, when measured at a surface portion of 30 microns thickness, being greater than about 30.
Claim 2
Dependent Claim
86 words
Artificial grain leather comprising a sheet composed of a resin and a multiplicity of entangled synthetic fibers having a denier of less than about 0.5, said sheet having a body portion and having a grain surface portion wherein the fibers are superentangled at a multiplicity of entangling points, the average distance between the entangling points in said grain surface portion being less than about 200 microns, and the fiber density coefficient, when measured at a surface portion of 30 microns thickness, being greater than about 30.
Claim 3
Dependent Claim
18 words
Artificial leather as defined as claim 1, wherein said body portion is essentially free from any resin binder.
Claim 4
Dependent Claim
27 words
Artificial leather as defined in claim 1, having a grain surface and a back surface, and wherein the back surface is essentially free of any resin binders.
Claim 5
Dependent Claim
29 words
Artificial leather as defined in claim 1, which has a non-porous resin layer on the grain portion of said surface, said resin layer being less than 20 microns thick.
Claim 6
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the fiber density coefficient is more than 30 when measured at a surface portion of 30 microns thickness.
Claim 7
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the fiber density coefficient is more than 30 when measured at a surface portion of 20 microns thickness.
Claim 8
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the fiber density coefficient is more than 30 when measured at a surface portion of 10 micron thickness.
Claim 9
Dependent Claim
16 words
Artificial leather as defined in claim 1, wherein said fiber density coefficient is more than 40.
Claim 10
Dependent Claim
16 words
Artificial leather as defined in claim 1, wherein said fiber density coefficient is more than 50.
Claim 11
Dependent Claim
21 words
Artificial leather as defined in claim 1, wherein said average distance between the entangling points is less than about 150 microns.
Claim 12
Dependent Claim
21 words
An artificial leather as defined in claim 1, wherein said distance between the entangling points is less than about 100 microns.
Claim 13
Dependent Claim
38 words
An artificial leather having a grained surface and having a back surface, wherein said back surface portion has a superentangled fiber layer having a distance between the entangling points of the fibers of less than about 200 microns.
Claim 14
Dependent Claim
38 words
An artificial leather having a grained surface and having a back surface, wherein said back surface portion has a superentangled fiber layer having a distance between the entangling points of the fibers of less than about 200 microns.
Claim 15
Dependent Claim
18 words
Artificial leather as defined in claim 12, wherein said average distance is less than about about 150 microns.
Claim 16
Dependent Claim
36 words
An artificial leather as defined in either of claims 12 and 13, wherein said back surface have a fiber density coefficient of greater than about 10, and a resin density coefficient of less than about 5.
Claim 17
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the weight ratio of the fibers based on the total weight of said leather is greater than 80%.
Claim 18
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the weight ratio of the fibers based on the total weight of said leather is greater than 85%.
Claim 19
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the weight ratio of the fibers based on the total weight of said leather is greater than 90%.
Claim 20
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the weight ratio of the fibers based on the total weight of said leather is greater than 95%.
Claim 21
Dependent Claim
26 words
Artificial leather as defined in claim 1, wherein the weight ratio of the fibers based on the total weight of said leather is greater than 97%.
Claim 22
Dependent Claim
50 words
Artificial leather which comprises a fiber sheet, said fiber sheet comprising a multiplicity of ultrafine fibers branching from bundles of ultrafine fine fibers or comprising said ultrafine fibers and said bundles of ultrafine fibers throughout its thickness, said ultrafine fibers and bundles of ultrafine fibers being entangled with one another.
Claim 23
Dependent Claim
50 words
Artificial leather which comprises a fiber sheet, said fiber sheet comprising a multiplicity of ultrafine fibers branching from bundles of ultrafine fine fibers or comprising said ultrafine fibers and said bundles of ultrafine fibers throughout its thickness, said ultrafine fibers and bundles of ultrafine fibers being entangled with one another.
Claim 24
Dependent Claim
24 words
Artificial leather as defined in claim 20, wherein a resin is disposed as a non-porous layer on a grain surface of said artificial leather.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |