US4210690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spun nonwoven fabric of polyester filaments for use as backing material for a deep-drawable tufted carpet
Assignee: Carl Freudenberg KG
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Filing: 1978-09-29
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Granted: 1980-07-01
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Expires: 1998-09-29
Abstract
Abstract A spun nonwoven fabric of polyester filaments for use as backing for a deep-drawable tufted carpet, wherein the polyester filaments hve uniformly distributed therethrough about 0.1 to 1% by weight of a diol-modified copolyester containing units of at least two different doils. For example, polyethylene terephthalate granulate is mixed with polyethylene butylene terephthalate copolymer and spun into a nonwoven web which is calendered and then tufted to form a carpet which can be deep-drawn with a three-dimensional shape. If desired, polyethylene terephthalte-adipate copolymer fibers can be co-spun into the web as binding fibers.
Inventors
- 👤 Ludwig Hartmann
- 👤 Ivo Ruzek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/005; D04H3/009; D04H3/011; D01; D01F; D01F6/00; D01F6/78; D01F6/84; D04H13/00; D04H3/08; D04H3/14; D04H3/153; D04H3/16; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T442/00; Y10T442/60; Y10T442/681
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A spun nonwoven fabric of polyester filaments for use as backing for a deep-drawable tufted carpet, wherein the polyester filaments have uniformly distributed therethrough about 0.1 to 1% by weight of a diol-modified copolyester containing units of at least two different diols; the diol composition of the copolyester differing from that of the polyester.
Claim 2
Dependent Claim
54 words
A spun nonwoven fabric of polyester filaments for use as backing for a deep-drawable tufted carpet, wherein the polyester filaments have uniformly distributed therethrough about 0.1 to 1% by weight of a diol-modified copolyester containing units of at least two different diols; the diol composition of the copolyester differing from that of the polyester.
Claim 3
Dependent Claim
41 words
A spun nonwoven fabric according to claim 1, wherein the diol-modified copolyester contains about 10 to 100 mole percent of an α,ω-diol, based on the diol component, which α,ω-diol is different from that of the α,ω-diol in the predominantly polyester filaments.
Claim 4
Dependent Claim
20 words
A spun nonwoven fabric according to claim 2, wherein the α,ω-diol is propanediol-1,3; 2-methylpropanediol-1,3; butanediol-1,4; 2-methylbutanediol-1,4; 2,2-dimethylbutanediol-1,5; 3-methylpentanediol-1,5 or 3,3-dimethylpentanediol-1,5.
Claim 5
Dependent Claim
23 words
A spun nonwoven fabric according to claim 3, wherein the polyester filaments comprise polyethylene terephthalate, and the α,ω-diol modified copolyester is the terephthalate.
Claim 6
Dependent Claim
46 words
A spun nonwoven fabric according to claim 4, wherein the polyester filaments comprise about 10 to 50% by weight of polyester binding fiber other than polyethylene terephthalate, about 10 to 90% of the acid units of the binding fiber being at least of two different acids.
Claim 7
Dependent Claim
17 words
A spun nonwoven fabric according to claim 5, carrying tufting and heat shaped into a three-dimensional structure.
Claim 8
Dependent Claim
76 words
A process for the manufacture of a spun nonwoven fabric according to claim 1, comprising feeding a polyethylene terephthalate granulate to a spinning extruder, feeding to the extruder a granulate of the diol-modified copolyester, melting both granulates in the extruder, spinning the melt through a spinneret to form a row of filaments, drawing the filaments by air streams, collecting the drawn filaments as a web permeable to air, and uniting the web into a nonwoven fabric.
References Cited (Backward Citations)
US3338992A
Cited
US3595731A
Cited
US3837988A
Cited
US3687759A
Cited
US3692618A
Cited
US3691004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |