Patent US4554121A successfully refreshed from Google Patents.
US4554121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming latent-contractable elastomeric composite yarns
Assignee: Akzona Inc
•
Filing: 1983-10-06
•
Granted: 1985-11-19
•
Expires: 2003-10-06
Abstract
Abstract This invention relates to a process for forming composite yarns comprising an elastic filament and at least one relatively inelastic filament, which process comprises entangling a latent-contractable elastomer producing polymer filament with a relatively inelastic filament while the latent-contractable filament is relatively unelongated (less than tension maintained 100% elongation) or preferably substantially unelongated (merely taut) to produce a composite yarn which can be formed into a yarn package with minimum stored energy compared to conventional elastomeric yarn packages and which yarn can be processed (e.g., knitted or woven) into goods on equipment normally employed for non-elastic fiber processing; and yet which composite yarn upon actuation of the latent contraction within the polymeric filament provides a composite yarn which is elastic.
Inventors
- 👤 Aloysius A. J. Kramers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:53
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/32; D02G3/328; D01; D01D; D01D5/00; D01D5/08; D01F; D01F6/00; D01F6/78; D01F6/84
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
A process for producing a latent-contractable elastomeric composite yarn, comprising: (a) an elastomer component consisting of at least one essentially undrawn latent contractable polymer filament which, upon heat treatment, contracts at least 15% of its original length to provide an elastomeric filament, and (b) at least one relatively inelastic companion filament, said process comprising feeding said filaments (a) and (b) into an air jet adapted to intermingle said filaments to provide a unitary composite yarn, said filament (a) being fed to said air jet in at least a taut, essentially non-elastically tension-elongated condition, but at less than 100% elastically tension-elongated, while said filament (b) is fed at a rate about equal to the feed rate of (a) or greater than the feed rate of (a) to provide an intermingled unitary composite yarn which, when heat treated, is an elastic yarn wherein the filament (b) becomes load bearing at less than about 95% of the break elongation of said filament (a).
Claim 2
Dependent Claim
160 words
A process for producing a latent-contractable elastomeric composite yarn, comprising: (a) an elastomer component consisting of at least one essentially undrawn latent contractable polymer filament which, upon heat treatment, contracts at least 15% of its original length to provide an elastomeric filament, and (b) at least one relatively inelastic companion filament, said process comprising feeding said filaments (a) and (b) into an air jet adapted to intermingle said filaments to provide a unitary composite yarn, said filament (a) being fed to said air jet in at least a taut, essentially non-elastically tension-elongated condition, but at less than 100% elastically tension-elongated, while said filament (b) is fed at a rate about equal to the feed rate of (a) or greater than the feed rate of (a) to provide an intermingled unitary composite yarn which, when heat treated, is an elastic yarn wherein the filament (b) becomes load bearing at less than about 95% of the break elongation of said filament (a).
Claim 3
Dependent Claim
20 words
The process of claim 1, wherein the filament (a) contracts at least 40% of its original length upon heat treatment.
Claim 4
Dependent Claim
17 words
The process of claim 1, wherein the filament (a) is relatively less elastic prior to heat treatment.
Claim 5
Dependent Claim
26 words
The process of claims 1, 2 or 3, wherein the filament (a) is fed to the air jet in a taut but essentially elastically unelongated condition.
Claim 6
Dependent Claim
39 words
The process of claims 1, 2 or 3, wherein the intermingled unitary yarn is collected as a package wound upon a hollow core with the filament (a) in an elastically unelongated state or elastically elongated less than about 100%.
Claim 7
Dependent Claim
22 words
The process of claim 5, wherein the filament is fed to the air jet in a taut but essentially elastically unelongated condition.
Claim 8
Dependent Claim
24 words
The process of claims 1 or 2 where the latent contractable polymer is a melt extruded, segmented, inherently elastic polyester-polyester or polyester-polyester thermoplastic polymer.
Claim 9
Dependent Claim
22 words
The process of claim 4 where the latent contractable polymer is a melt extruded, segmented, inherently elastic polyester-polyester or polyester-polyether thermoplastic polymer.
References Cited (Backward Citations)
CA761720A
Cited
CA657774A
Cited
CA784813A
Cited
US1860030A
Cited
GB711279A
Cited
US2783609A
Cited
US2990671A
Cited
US3017740A
Cited
US3041812A
Cited
US3013379A
Cited
US2985995A
Cited
US3115691A
Cited
GB996874A
Cited
US3234725A
Cited
GB1091422A
Cited
US3303640A
Cited
US3357954A
Cited
US3679633A
Cited
US3342028A
Cited
US3353345A
Cited
US3364537A
Cited
US3357076A
Cited
US3476850A
Cited
US3412547A
Cited
US3408435A
Cited
US3609953A
Cited
US3701755A
Cited
US3880976A
Cited
US3701248A
Cited
US3537803A
Cited
US3998921A
Cited
US3812668A
Cited
US3991548A
Cited
US3973387A
Cited
US3940917A
Cited
US4262114A
Cited
US4467595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |