US5445653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dyeing nylon to produce colorfast fiber which resists further dyeing
Assignee: Ascend Performance Materials Operations LLC
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Filing: 1994-03-28
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Granted: 1995-08-29
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Expires: 2014-03-28
Abstract
Abstract A method of dyeing nylon, particularly cationic dyeable Type 6 and 66 nylon and light dyeable Type 66 nylon, so that the dyed fiber will resist taking on further dye and will have a high degree of wash and bleed fastness when the dyed fiber is subjected to a further high temperature aqueous dye bath. The method includes providing a bifunctional dye solution having a very low pH, i.e. no higher than 1.5. The dye is applied to the fiber with a degree of wet pick-up exceeding 100% by weight of the fiber. The fiber is then steamed, washed, and dried, and contacted by an alkaline solution, such as a trisodium phosphate solution. Thereafter, the fiber is autoclaved. Such a dyed nylon fiber can be combined with an undyed nylon fiber to produce a textile product. When such a product is subjected to a dyeing operation, to provide the undyed nylon with a color different from the color of the previously-dyed fiber, the previously-dyed fiber will not bleed or wash out, and will resist taking on the dye being used to color the undyed nylon.
Inventors
- 👤 Robert R. Hixson
- 👤 Randy J. Rawlston
- 👤 Hobert C. Sweatman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:11
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67366; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/248; D06P5/00; D06P5/20; D06P5/2044; D06P5/2061
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
122 words
A method of dyeing cationic dyeable Type 6 and 66 nylon and light dyeable Type 66 nylon, so that the dyed fiber will resist taking on further dye and will have a high degree of wash and bleed fastness when the dyed fiber is subjected to a further high temperature aqueous dyebath, the method comprising the steps of: providing a bifunctional fiber reactive dye solution capable of forming both ionic and covalent bonds with the amine groups of tile fiber, the dye solution having a pH no higher than 1.5, applying the dye to the fiber with a degree of wet pick up exceeding 100% by weight of the fiber, contacting the fiber with an alkaline solution, and thereafter autoclaving the fiber.
Claim 2
Independent Claim
122 words
A method of dyeing cationic dyeable Type 6 and 66 nylon and light dyeable Type 66 nylon, so that the dyed fiber will resist taking on further dye and will have a high degree of wash and bleed fastness when the dyed fiber is subjected to a further high temperature aqueous dyebath, the method comprising the steps of: providing a bifunctional fiber reactive dye solution capable of forming both ionic and covalent bonds with the amine groups of tile fiber, the dye solution having a pH no higher than 1.5, applying the dye to the fiber with a degree of wet pick up exceeding 100% by weight of the fiber, contacting the fiber with an alkaline solution, and thereafter autoclaving the fiber.
Claim 3
Dependent Claim
26 words
A method as defined in claim 1 including the steps of steaming, washing, and drying the fiber prior to contacting the fiber with the alkaline solution.
Claim 4
Dependent Claim
31 words
A method as defined in claim 1 wherein the fiber is contacted with the alkaline solution before autoclaving by spraying it directly onto the fiber during the skeining or reeling operation.
Claim 5
Dependent Claim
15 words
A method as defined in claim 1 wherein the bifunctional fiber reactive dye is previnylized.
Claim 6
Dependent Claim
16 words
A method as defined in claim 1 wherein the alkaline solution is a trisodium phosphate solution.
Claim 7
Dependent Claim
19 words
A method as defined in claim 1 wherein the pH of the dye solution is between 0.5 and 1.5.
Claim 8
Dependent Claim
30 words
A method as defined in claim 1 wherein the dye is applied to the fiber with a degree of wet pick-up of at least 200% by weight of the nylon.
Claim 9
Dependent Claim
18 words
A method as defined in claim 7 wherein the degree of wet pick-up is between 200% and 350%.
Claim 10
Dependent Claim
59 words
A method as defined in claim 1 including the steps of combining the fiber dyed by the method set forth in claim 1 with an undyed polyamide fiber to produce a textile product, and then contacting the textile product with an aqueous dye bath having a color different from that of the color of the bifunctional fiber dye solution.
Claim 11
Independent Claim
135 words
A method of dyeing cationic dyeable Type 6 and 66 nylon and light dyeable Type 66 nylon, so that the dyed fiber will resist taking on further dye and will have a high degree of wash and bleed fastness when the dyed fiber is subjected to a further high temperature aqueous dyebath, the method comprising the steps of: providing a bifunctional fiber reactive dye solution capable of forming both ionic and covalent bonds with the amine groups of the fiber, the dye solution having a pH no higher than 1.5, applying the dye to the fiber with a degree of wet pick-up exceeding 100% by weight of the fiber, steaming, washing, and drying the fiber, thereafter spraying an alkaline solution directly onto the fiber during the skeining or reeling operation, and thereafter autoclaving the fiber.
Claim 12
Independent Claim
135 words
A method of dyeing cationic dyeable Type 6 and 66 nylon and light dyeable Type 66 nylon, so that the dyed fiber will resist taking on further dye and will have a high degree of wash and bleed fastness when the dyed fiber is subjected to a further high temperature aqueous dyebath, the method comprising the steps of: providing a bifunctional fiber reactive dye solution capable of forming both ionic and covalent bonds with the amine groups of the fiber, the dye solution having a pH no higher than 1.5, applying the dye to the fiber with a degree of wet pick-up exceeding 100% by weight of the fiber, steaming, washing, and drying the fiber, thereafter spraying an alkaline solution directly onto the fiber during the skeining or reeling operation, and thereafter autoclaving the fiber.
References Cited (Backward Citations)
US4693725A
Cited
US5131918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |