Process for preparing multi-colored dyed polyamide substrates in

Details Process for preparing multi-colored dyed polyamide substrates in Process for preparing multi-colored dyed polyamide substrates in

1990-12-13

1992-07-21

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Process of printing permanently on substrate, other than...

Resist or reserve

8446, 8924, 8929, D06P 512

Patent

active

051319144

ABSTRACT:
This is a method for producing multi-colored polyamide dyeings which is particularly useful in the multi-colored dyeing of polyamide carpets. In this method, a three-component dyeing system is employed which comprises a fiber reactive dye, an anionic resist and an acid-type dye. The anionic resist is a water-soluble, fiber substantative compound which displaces and/or prevents the fiber-reactive dye form fixing in that portion of the carpet which has been treated with the resist. The anionic resist, however, will not displace the acid-type dye component nor does it prevent fixation of the acid-type dye component. The invention may be practiced by first printing the polyamide substrate in a predetermined pattern with a printing paste containing the acid-type dye and the anionic resist. The substrate is then flooded or blotch printed with the fiber reactive dye and steamed to fix the dyes. Alternatively, the substrate may be first flooded or blotch printed with the fiber reactive dye. The acid-type dye and anionic resist are then printed on top of the fiber reactive dye. The anionic resist displaces the fiber-reactive dye and the dyes are fixed by steaming. The method produce fine distinct color patterns with essentially no blurring or mixing of the colors between the printed and unprinted portions of the substrate.

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