US4035464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyamide-6 filament yarns
Assignee: Bayer AG
•
Filing: 1975-07-11
•
Granted: 1977-07-12
•
Expires: 1995-07-11
Abstract
Abstract The invention relates to a process for the continuous production of a stretched and interlaced polyamide-6 filament yarn wherein the filaments are interlaced before stretching.
Inventors
- 👤 Harry Kubitzek
- 👤 Georg Hinrichsen
- 👤 Wolfgang Giessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:43
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/221; D01; D01D; D01D5/00; D01D5/12; D01D5/16; D01F; D01F6/00; D01F6/58; D01F6/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
A process for the continuous production of stretched and twisted polyamide-6 filament yarns from polyamide-6 melts by extruding the melt through spinnerets, cooling the filaments by blowing air onto them in the spinning duct, wetting the bundle of filaments with an aqueous preparation and running off the filament yarn with a take-off unit around which the filament yarn passes at least once, followed by direct stretching with a stretching unit and winding into package form, wherein, before stretching, the filament yarn is interlaced in such a way that it has a hook-drop value of at most 200 mm and wherein the filament yarn is treated after stretching at temperature above 110° C.
Claim 2
Dependent Claim
112 words
A process for the continuous production of stretched and twisted polyamide-6 filament yarns from polyamide-6 melts by extruding the melt through spinnerets, cooling the filaments by blowing air onto them in the spinning duct, wetting the bundle of filaments with an aqueous preparation and running off the filament yarn with a take-off unit around which the filament yarn passes at least once, followed by direct stretching with a stretching unit and winding into package form, wherein, before stretching, the filament yarn is interlaced in such a way that it has a hook-drop value of at most 200 mm and wherein the filament yarn is treated after stretching at temperature above 110° C.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1, wherein the filament yarn is treated after stretching at temperatures in the range from 115° to 130° C.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1 wherein the hook-drop value is at most 100 mm.
References Cited (Backward Citations)
US3279164A
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US3529413A
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US3457338A
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US3452130A
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US3555808A
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US3719442A
Cited
US3803282A
Cited
JPS4736457U
Cited
US3733801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |