Patent US1658455A successfully refreshed from Google Patents.
Patent US4515854A successfully refreshed from Google Patents.
US4515854A
Expired / Lapsed
US
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Entangled fibrous mat having good elasticity and methods for the production thereof
Assignee: Kuraray Co Ltd
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Filing: 1984-04-30
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Granted: 1985-05-07
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Expires: 2004-04-30
Abstract
Abstract An entangled fibrous mat comprising an elastic polymer fiber A and a nonelastic polymer fiber B, said fiber A having voids therein and being in a taut condition within the mat; while said fiber B is in a slack condition and is highly elastic and flexible, rich in fullness, and firm-bodied, thus being very suitable for use as a substrate for artificial leather.
Inventors
- 👤 Kunio Kogame
- 👤 Yoshihiro Tanba
- 👤 Masaru Makimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:14
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/42; D04H1/4282; D04H1/4291; D04H1/4326; D04H1/4334; D04H1/435; D04H1/4358; D04H1/4382; D04H1/43825; D04H1/43835; D04H1/58; D04H1/587; D04H1/64; D06; D06N; D06N3/00; D06N3/0002; D06N3/0004; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T442/00; Y10T442/60; Y10T442/601; Y10T442/602; Y10T442/682; Y10T442/697
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
An entangled fibrous mat comprising a fiber A consisting essentially of an elastic polymer and a fiber B consisting essentially of a nonelastic polymer, said fiber A formed by removing, after entanglement with fiber B, nonelastic polymer from a fiber comprising a nonelastic polymer and an elastic polymer, thereby forming axially extending long voids therein, said fiber A being in a taut condition within the mat and said fiber B being in a slack condition.
Claim 2
Dependent Claim
75 words
An entangled fibrous mat comprising a fiber A consisting essentially of an elastic polymer and a fiber B consisting essentially of a nonelastic polymer, said fiber A formed by removing, after entanglement with fiber B, nonelastic polymer from a fiber comprising a nonelastic polymer and an elastic polymer, thereby forming axially extending long voids therein, said fiber A being in a taut condition within the mat and said fiber B being in a slack condition.
Claim 3
Dependent Claim
39 words
A fibrous mat as claimed in claim 1, wherein said fiber B is formed by removing, from a fiber composing of at least two nonelastic polymers, at least one polymer so as to leave at least one other polymer.
Claim 4
Dependent Claim
28 words
A fibrous mat as claimed in claim 1, wherein the weight ratio of said fiber A to said fiber B is within the range of 85:15 to 15:85.
Claim 5
Dependent Claim
19 words
A fibrous mat as claimed in claim 1, wherein said fibrous mat is provided with a binder resin therein.
Claim 6
Dependent Claim
16 words
A fibrous mat as claimed in claim 1, wherein said elastic polymer is a polyurethane elastomer.
Claim 7
Dependent Claim
27 words
A fibrous mat as claimed in claim 1, wherein said nonelastic polymer comprises at least one polymer selected from the group consisting of polyesters, polyamides and polyolefins.
Claim 8
Dependent Claim
16 words
A fibrous mat as claimed in claim 4, wherein said binder resin is a polyurethane elastomer.
Claim 9
Dependent Claim
36 words
The fibrous mat as claimed in claim 1 wherein portions of said entangled fibers are generally oriented parallel to the surface of the mat and other portions are generally oriented into the thickness of the mat.
Claim 10
Dependent Claim
16 words
The fibrous mat as claimed in claim 8 wherein said fibers are entangled by needle punching.
Claim 11
Independent Claim
104 words
A method of producing a fibrous mat having good elasticity which comprises blending a fiber C comprising an elastic polymer and nonelastic polymer and a fiber D comprising a nonelastic polymer, forming a web from the fiber blend, subjecting the web to treatment for entanglement, and subjecting the resulting fibrous mat to the following steps (1) and (2) in the order of (1)-(2) or (2)-(1): (1) the step of subjecting the fibrous mat to shrinkage such that the elastic polymer-containing fiber shrinks to a greater extent than the substantially elastic polymer-free fiber; (2) the step of removing the nonelastic polymer from said fiber C.
Claim 12
Independent Claim
104 words
A method of producing a fibrous mat having good elasticity which comprises blending a fiber C comprising an elastic polymer and nonelastic polymer and a fiber D comprising a nonelastic polymer, forming a web from the fiber blend, subjecting the web to treatment for entanglement, and subjecting the resulting fibrous mat to the following steps (1) and (2) in the order of (1)-(2) or (2)-(1): (1) the step of subjecting the fibrous mat to shrinkage such that the elastic polymer-containing fiber shrinks to a greater extent than the substantially elastic polymer-free fiber; (2) the step of removing the nonelastic polymer from said fiber C.
Claim 13
Dependent Claim
36 words
A method as claimed in claim 10, wherein a step (3) of impregnating the fibrous mat with a binder resin followed by coagulation is combined with the steps (1) and (2) in either of said orders.
Claim 14
Dependent Claim
40 words
A method as claimed in claim 11, wherein, when fiber D is a fiber comprising two or more nonelastic polymers, a step (4) of removing at least one polymer is combined with the steps (1)-(3) in either of said orders.
Claim 15
Dependent Claim
16 words
A method as claimed in claim 12, wherein steps (3) and (4) are carried out simultaneously.
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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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |