Indigo-free fabric with denim visual appearance
AssigneeSwiss Performance Chemicals AG
InventorMickael MHEIDLE
Life of this patent
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Abstract
An indigo-free fabric and its manufacturing method are disclosed. The indigo-free fabric has the visual appearance of a denim. The indigo-free fabric contains at least 70 wt % of cellulose fibers. The indigo-free manufacturing process includes inkjet printing a parallel straight lines pattern on at least part of the fabric, wherein each of the one or more inks contains a reactive dye and preferably has a viscosity from 5 cP to 9 cP, more preferably from 6 to 7 cP, at 25° C. and a shear rate 200-400 s−1.
Claims19
An indigo-free process for manufacturing a fabric having a visual appearance of a denim comprising the following steps:
- a) providing a non-coloured fabric containing at least 70 wt-% cellulose fibers;
- b) contacting the non-coloured fabric with an alkali solution;
- c) inkjet printing a parallel straight lines pattern on a back side of the fabric, or a region of said back side of the fabric, with one or more inks, to provide a visual appearance of a back side of a denim,
- wherein
- each of the one or more inks contains a reactive dye;
- d) drying the fabric;
- e) inkjet printing a front side of the fabric, or a region of said front side of the fabric, with one or more inks, to provide a visual appearance of a front side of a denim, wherein
- each of the one or more inks contains a reactive dye;
- f) fixing the reactive dyes to the fabric;
- and
- g) optionally washing and drying the fabric.
An indigo-free fabric having a visual appearance of a denim, wherein
- a back side of the fabric, or a region of said back side, has an inkjet printed parallel straight lines pattern and a visual appearance of a back side of a denim,
- a front side of the fabric, or a region of said front side, has an inkjet printed pattern having the visual appearance of a front side of a denim, and
- said fabric contains at least 70 wt-% of cellulose fibers containing hydroxyl groups substituted with a moiety of general formula Chr-L-, wherein Chr is a chromogen, and -L- is a linker connecting the chromogen to the oxygen of the hydroxyl group.
Dependencies are inferred from the claim text.