US4096226A
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Integrated spin-draw-texturizing process for manufacture of texturized polyamide filaments
Assignee: BASF SE
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Filing: 1977-05-12
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Granted: 1978-06-20
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Expires: 1997-05-12
Abstract
Abstract Integrated process for continuous spinning, drawing and texturizing of synthetic linear high molecular weight polyamide polymers, in which the following steps are effected in immediate succession: (a) melt-spinning filaments of said synthetic linear high polyamide polymers, preferably poly-ε-caprolactam, at temperatures of between 260° and 295° C and a spin-draw ratio of between 1:10 and 1:60, (b) drawing the spun filaments on at least two forwarding elements, of which the initial element has a surface temperature of between 50° and 120° C and the final element has a surface temperature of between 80° and 350° C, at a draw ratio such that the drawn filament, on leaving the drawing stage, has an extensibility of between 10 and 50% and preferably of between 20 and 35%, and (c) texturizing said filaments at a velocity of between 800 and 3,000 m/min by an air jet process and preferably between 1,600 and 2,000 m/min, the overfeed in the texturizing stage being from 10 to 50% at a filament temperature, prior to texturization, of between 50° and 180° C and preferably of between 100° to 130° C.
Inventors
- 👤 Wolfgang Martin
- 👤 Dieter Herion
- 👤 Dimiter Bayew
- 👤 Wolfgang Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:54
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/20; D02G1/205; D01; D01D; D01D13/00; D01D13/02; D01D5/00; D01D5/12; D01D5/16; D01F; D01F6/00; D01F6/58; D01F6/60; D02G1/16; D02G1/165; D02J; D02J1/00; D02J1/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
255 words
In an integrated process for the manufacture of a texturized yarn by a continuous melt-spinning, drawing and texturizing of a fiber-forming synthetic linear high molecular weight polymer selected from the group consisting of poly-ε-caprolactam and polyhexamethylene adipamide wherein the steps of spinning, drawing and texturizing are combined in immediate succession, the improvement which comprises: a. melt-spinning filaments of said fiber-forming polymer at a temperature of between 260° C and 295° C and at a spin-draw melt attenuation ratio of between 1:10 and 1:60; b. drawing the spun filaments only on forwarding elements for the development of a uniform tensile strength and modulus of elasticity, said spun filaments being collected as a bundle leaving the melt-spinning stage and directly wound on at least two forwarding elements, of which the initial elements have a surface temperature of between 50° C and 120° C and the final element has a surface temperature of between 80° C and 350° C at a draw ratio such that the drawn filaments on leaving the drawing stage, have an extensibility of between 10 and 50%; and c. air-texturizing said filaments as a collected yarn leaving the drawing stage at a velocity of between 800 and 3,000 m/min, the overfeed in the texturizing stage being from 10 to 50% at a filament temperature, prior to texturization, of between 50° C and 180° C, the spinning, drawing and texturizing yielding a yarn with a total final denier of from 100 to 3,600 dtex and an individual filament denier of from 3 to 30 dtex.
Claim 2
Dependent Claim
255 words
In an integrated process for the manufacture of a texturized yarn by a continuous melt-spinning, drawing and texturizing of a fiber-forming synthetic linear high molecular weight polymer selected from the group consisting of poly-ε-caprolactam and polyhexamethylene adipamide wherein the steps of spinning, drawing and texturizing are combined in immediate succession, the improvement which comprises: a. melt-spinning filaments of said fiber-forming polymer at a temperature of between 260° C and 295° C and at a spin-draw melt attenuation ratio of between 1:10 and 1:60; b. drawing the spun filaments only on forwarding elements for the development of a uniform tensile strength and modulus of elasticity, said spun filaments being collected as a bundle leaving the melt-spinning stage and directly wound on at least two forwarding elements, of which the initial elements have a surface temperature of between 50° C and 120° C and the final element has a surface temperature of between 80° C and 350° C at a draw ratio such that the drawn filaments on leaving the drawing stage, have an extensibility of between 10 and 50%; and c. air-texturizing said filaments as a collected yarn leaving the drawing stage at a velocity of between 800 and 3,000 m/min, the overfeed in the texturizing stage being from 10 to 50% at a filament temperature, prior to texturization, of between 50° C and 180° C, the spinning, drawing and texturizing yielding a yarn with a total final denier of from 100 to 3,600 dtex and an individual filament denier of from 3 to 30 dtex.
Claim 3
Dependent Claim
15 words
A process as claimed in claim 1 in which the linear high polymer is poly-ε-caprolactam.
Claim 4
Dependent Claim
41 words
A process as claimed in claim 2, in which a poly-ε-caprolactam having a relative viscosity, measured on a solution of 1 g of poly-ε-caprolactam in 100 ml of 96% sulfuric acid at 25° C of between 2.3 and 3.5 is used.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1, in which the capillary cross-section of the individual filaments has a polylobate shape.
Claim 6
Dependent Claim
23 words
A process as claimed in claim 1, in which the undrawn yarn has a shrinkage in boiling water of between -10 and +10%.
Claim 7
Dependent Claim
34 words
A process as claimed in claim 1, in which the filaments are drawn in two stages, the amount of drawing in the first stage being from two-thirds to three-quarters of the total draw ratio.
Claim 8
Dependent Claim
53 words
A process as claimed in claim 1 wherein the spin-draw melt attenuation ratio is from 1:20 to 1:40, the final forwarding element has a surface temperature of from 140° to 180° C, and the draw ratio in step (b) is sufficient to give the drawn filaments an extensibility of from 20 to 35%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |