US4418116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester binder filaments and fibers
Assignee: EIDP Inc
•
Filing: 1981-11-03
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Granted: 1983-11-29
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Expires: 2001-11-03
Abstract
Abstract Novel improved copolyester binder filaments and fibers consist essentially of the terephthalate of ethylene and diethylene glycols with the mol percent of the latter being in the range of 20 to 45 percent.
Inventors
- 👤 Paul T. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:14
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; D01F6/00; D01F6/78; D01F6/84; D04; D04H; D04H1/00; D04H1/40; D04H1/54; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/29; Y10T428/2904; Y10T428/2905; Y10T428/2909; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/298; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/635; Y10T442/69; Y10T442/692
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A copolyester binder filament wherein the copolyester consists essentially of a terephthalate of ethylene and diethylene glycols and the mol percent of diethylene glycol based on the mols of terephthalate is within the range of 25 to 35%, with the binder filaments having a crystallinity based on fiber density of less than 25%, and the copolyester having a crystalline half-time at 150° C. of greater than 2 minutes.
Claim 2
Dependent Claim
68 words
A copolyester binder filament wherein the copolyester consists essentially of a terephthalate of ethylene and diethylene glycols and the mol percent of diethylene glycol based on the mols of terephthalate is within the range of 25 to 35%, with the binder filaments having a crystallinity based on fiber density of less than 25%, and the copolyester having a crystalline half-time at 150° C. of greater than 2 minutes.
Claim 3
Dependent Claim
17 words
A filament of claim 1 having a denier within the range of from about 1 to 20.
Claim 4
Dependent Claim
22 words
A filament of claim 1 which is a crimped fiber having an extended length within the range of 2.5 to 12 cm.
Claim 5
Dependent Claim
15 words
A filament of claim 1 having a crystalline melting point of less than 200° C.
Claim 6
Dependent Claim
17 words
A filament of claim 1 wherein the copolyester consists of the terephthalate of ethylene and diethylene glycols.
Claim 7
Dependent Claim
94 words
A blend of filaments suitable for making a heat-bonded filament structure consisting essentially of filaments of poly(ethylene terephthalate) and from 5 to 35% by weight of binder filaments of a copolyester which consists essentially of a terephthalate of ethylene and diethylene glycols in which copolyester the mol percent of diethylene glycol based on mols of terephthalate is within the range of 25 to 35%, with the binder filaments having a crystallinity based on fiber density of less than 25%, and the copolyester having a crystalline half-time at 150° C. of greater than two minutes.
Claim 8
Dependent Claim
94 words
A blend of filaments suitable for making a heat-bonded filament structure consisting essentially of filaments of poly(ethylene terephthalate) and from 5 to 35% by weight of binder filaments of a copolyester which consists essentially of a terephthalate of ethylene and diethylene glycols in which copolyester the mol percent of diethylene glycol based on mols of terephthalate is within the range of 25 to 35%, with the binder filaments having a crystallinity based on fiber density of less than 25%, and the copolyester having a crystalline half-time at 150° C. of greater than two minutes.
Claim 9
Dependent Claim
13 words
A filament blend of claim 6 in the form of a fiberfill batt.
Claim 10
Dependent Claim
13 words
A filament blend of claim 6 in the form of a nonwoven sheet.
References Cited (Backward Citations)
US3554976A
Cited
US3989788A
Cited
US4068036A
Cited
US4025592A
Cited
US4129675A
Cited
GB1601586A
Cited
US4328278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |