Claims
- 1. A process of printing cationic-dyeable nylon fibers comprising applying to said fibers a print paste containing an acid dye or a premetallized acid dye at a pH of from about 2.0 to about 6.5 and fixing the dye to the fibers.
- 2. A process of preparing a stain-resistant, lightfast nylon carpet comprising the steps of:
- (a) dyeing cationic-dyeable nylon fibers in a dyebath with an acid dye or a premetallized acid dye at a pH of from about 2.0 to about 6.5 to dye the nylon fibers,
- (b) forming a carpet from said dyed fibers
- (c) applying to the dyed nylon carpet a print paste containing an acid dye or premetallized acid dye and dyeing the nylon fibers contacted with the print paste; and thereafter,
- (d) heating the dye-laden fibers to fix the dye into the fibers.
- 3. The process of claims 1 or 2, in which the nylon fibers contain SO.sub.3 H or COOH or both SO.sub.3 H and COOH groups receptive to cationic or basic dyes in an amount sufficient to render the cationic fiber dyeable with a cationic or basic dye.
- 4. The process of claims 1 or 2, in which the nylon fibers are dyed at a pH of from about 4.0 to about 6.5.
- 5. The process of claims 1 or 2, in which, subsequent to dye fixation, a fluorocarbon repellant is applied to the fibers.
- 6. The process of claim 2, in which sodium sulfate is also present in the dyebath, the print paste or both.
- 7. A printed nylon carpet having improved stain resistance composed of cationic-dyeable fibers dyed at a pH of from about 2.0 to about 6.5 with an acid dye or a premetallized acid dye and overprinted at a pH of from about 2.0 to about 6.5 with an acid dye or premetallized acid dye.
- 8. A printed nylon carpet composed of cationic-dyeable nylon and dyed at a pH of from about 2.0 to about 6.5 to a predetermined depth of shade with an acid dye and overprinted with an acid dye or a premetallized acid dye, the carpet being resistant to acid type stains and exhibiting improved fastness to light as compared to cationic-dyeable nylon dyed to a similar depth of shade with a cationic dye.
- 9. A process of preparing stain-resistant, lightfast nylon yarn comprising dyeing cationic-dyeable yarn with a premetallized acid dye at a pH of about 4.0 to less than about 6.5 and fixing the dye to the yarn.
- 10. The process of claim 9, in which the nylon yarn contains SO.sub.3 H groups or COOH groups or both SO.sub.3 H and COOH groups receptive to cationic or basic dyes in an amount sufficient to render the cationic fiber dyeable with a cationic or basic dye.
- 11. The process of claim 10, in which the nylon yarn contains COOH groups.
- 12. A process of dyeing heatset cationic-dyeable nylon yarn comprising dyeing said yarn with a premetallized acid dye at a pH of from about 2.0 to less than about 6.5 and fixing the dye to the yarn.
- 13. A process of preparing a stain-resistant, lightfast nylon yarn comprising dyeing heatset cationic-dyeable nylon yarn with a premetallized acid dye at a pH of from 2.0 to less than about 6.5 to dye the nylon yarn and heating the dye-laden yarn to fix the dye into the yarn.
- 14. The process of claims 12 or 13, in which the nylon yarn contains SO.sub.3 H or COOH or both SO.sub.3 H and COOH groups receptive to cationic or basic dyes in an amount sufficient to render the cationic yarn dyeable with a cationic or basic dye.
- 15. The process of claims 12 or 13, in which the nylon yarn is dyed at a pH of from about 4.0 to about 6.0.
- 16. The process of claims 12 or 13, in which, subsequent to dye fixation, a fluorocarbon repellant is applied to the yarn.
- 17. The process of dyeing 100% cationic dyeable nylon yarn comprising dyeing said yarn in a dyebath containing at least one acid dye and devoid of cationic dyes at a pH of from about 2.0 to less than about 6.5 and fixing the dye to the cationic dyeable yarn.
- 18. A process of preparing a stain-resistant, lightfast nylon yarn comprising dyeing cationic-dyeable nylon yarn with an acid dye at a pH of from about 2.0 to less than about 6.5 to impart the requisite depth of shade to the nylon yarn and heating the dye-laden yarn to fix the dye into the yarn.
- 19. The process of claims 17 or 18, in which the nylon yarn contains SO.sub.3 H and/or COOH groups receptive to cationic or basic dyes in an amount sufficient to render the cationic yarn dyeable with a cationic or basic dye.
- 20. The process of claims 17 or 18, in which the nylon yarn is dyed at a pH of from about 4.0 to about 6.5.
- 21. The process of claims 17 or 18, in which, subsequent to dye fixation, a fluorocarbon repellant is applied to the yarn.
- 22. The process of claims 17 or 18, in which sodium sulfate is also present in the dyebath.
- 23. A process of preparing a stain resistant, multicolored, cationic dyeable nylon yarn comprising the successive steps of (a) dyeing a cationic dyeable nylon yarn in a dyebath with an acid dye at a pH of about 2.0 to less than 6.5 and fixing the acid dye to yarn to produce a desired base shade; (b) overprinting the dyed cationic dyeable yarn of step (a) by applying a print paste containing an acid dye or a premetallized acid dye to produce a multicolored stain-resistant nylon yarn.
- 24. A process of preparing a stain resistant, multicolored, cationic dyeable nylon yarn comprising the successive steps of (a) dyeing a cationic dyeable nylon yarn in a dyebath with a premetallized acid dye at a pH of about 2.0 to less than 6.5 and fixing the acid dye to yarn to produce a desired base shade, (b) overprinting the dyed cationic dyeable yarn of step (a) by applying a print paste containing an acid dye or a premetallized acid dye to produce a multicolored stain-resistant nylon yarn.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is continuation-in-part of earlier application Ser. No. 08/335,951 filed Nov. 3, 1994, now U.S. Pat. No. 5,466,527, which is a continuation of Ser. No. 08/051,682 filed Apr. 23, 1993, abandoned, which is a continuation-in-part of application Ser. No. 07/787,220 filed Nov. 4, 1991, abandoned, which, is a division of application Ser. No. 07/552,178 filed Jul. 12, 1990, now U.S. Pat. No. 5,085,667, which is a continuation-in-part of earlier application Ser. No. 07/519,237 filed May 4, 1990, abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (4)
| Number |
Date |
Country |
| 1-221574 |
Sep 1989 |
JPX |
| 1-223908 |
Sep 1989 |
JPX |
| 1-272885 |
Oct 1989 |
JPX |
| 1-260061 |
Oct 1989 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
| Parent |
552178 |
Jul 1990 |
|
Continuations (1)
|
Number |
Date |
Country |
| Parent |
51682 |
Apr 1993 |
|
Continuation in Parts (3)
|
Number |
Date |
Country |
| Parent |
335951 |
Nov 1994 |
|
| Parent |
787220 |
Nov 1991 |
|
| Parent |
519237 |
May 1990 |
|
Patent Grant
5571290
