Claims
- 1. A process of preparing a stain-resistant, lightfast nylon carpet comprising the steps of:
- (a) dyeing cationic-dyeable nylon fibers by 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,
- (b) forming the then printed nylon fibers into a carpet,
- (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.
- 2. The process of claim 1, 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.
- 3. The process of claim 1 in which the nylon fibers are dyed at a pH of from about 4.0 to about 6.5.
- 4. The process of claim 1 in which, subsequent to dye fixation of step (d), a fluorocarbon repellant is applied to the fibers.
- 5. The process of claim 1 in which sodium sulfate is also present in the print paste of step (a), step (c) or both.
- 6. A process of preparing a stain resistant, multicolored, cationic dyeable nylon yarn comprising the successive steps of (a) applying to a cationic dyeable nylon yarn a print paste containing an acid dye at a pH of about 2.0 to less than 6.5 and fixing the acid dye to the yarn to produce a desired base shade; and (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.
- 7. A process of preparing a stain resistant, multicolored, cationic dyeable nylon yarn comprising the successive steps of (a) applying to a cationic dyeable nylon yarn a print paste containing a premetallized acid dye at a pH of about 2.0 to less than 6.5 and fixing the premetallized acid dye to the 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.
- 8. A process of preparing stain-resistant, lightfast nylon yarn comprising printing 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.
- 9. The process of claim 8 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.
- 10. The process of claim 9 in which the nylon yarn contains COOH groups.
- 11. A process of dyeing heatset cationic-dyeable nylon yarn comprising printing 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.
- 12. A process of preparing a stain-resistant, lightfast nylon yarn comprising printing heatset cationic-dyeable nylon yarn with a premetallized acid dye at a pH of from about 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.
- 13. The process of claim 11 or 12 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.
- 14. The process of claim 11 or 12 in which the nylon yarn is dyed at a pH of from about 4.0 to about 6.0.
- 15. The process of claim 11 or 12 in which, subsequent to dye fixation, a fluorocarbon repellant is applied to the yarn.
- 16. The process of dyeing 100% cationic dyeable nylon yarn comprising applying to said yarn a print paste 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.
- 17. A process of preparing a stain-resistant, lightfast nylon yarn comprising printing 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.
- 18. The process of claim 16 or 17 in which the nylon yarn contains SO.sub.3 H 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 yarn dyeable with a cationic or basic dye.
- 19. The process of claim 16 or 17 in which the nylon yarn is dyed at a pH of from about 4.0 to about 6.5.
- 20. The process of claim 16 or 17, in which, subsequent to dye fixation, a fluorocarbon repellant is applied to the yarn.
- 21. The process of claim 16 or 17 in which sodium sulfate is also present in the print paste.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 08/533,817, filed Sep. 25, 1995, now U.S. Pat. No. 5,571,290 which is a 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.
This invention relates to improving the stain resistance, lightfastness and ozone resistance of nylon, especially nylon carpet.
US Referenced Citations (13)
Foreign Referenced Citations (8)
Number |
Date |
Country |
1221574 |
Sep 1989 |
JPX |
1221574 |
Sep 1989 |
JPX |
1223908 |
Sep 1989 |
JPX |
1223908 |
Sep 1989 |
JPX |
1260061 |
Oct 1989 |
JPX |
1072885 |
Oct 1989 |
JPX |
1272885 |
Oct 1989 |
JPX |
1260061 |
Oct 1989 |
JPX |
Non-Patent Literature Citations (1)
Entry |
DuPont Fibers Technical Information Nylon Bulletin N-218 2/68 DuPont Nylon Styling Yarns for Carpets Feb. 1986. |
Divisions (1)
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Number |
Date |
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Parent |
552178 |
Jul 1990 |
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Continuations (1)
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Number |
Date |
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Parent |
051682 |
Apr 1993 |
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Continuation in Parts (4)
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Number |
Date |
Country |
Parent |
533817 |
Sep 1995 |
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Parent |
335951 |
Nov 1994 |
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Parent |
787220 |
Nov 1991 |
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Parent |
519237 |
May 1990 |
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