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US 9,091,021 B2Granted
Method of dyeing cellulosic substrates
AssigneeOasis Dyeing Systems, LLC
InventorTimothy Scott Heller
Life of this patent
Estimating the term…
Abstract
The present invention is related to methods for dyeing a traveling cellulosic substrate. The methods include steps of cationizing a cellulosic substrate followed by applying foam including one or more dyes to the cationized cellulosic substrate.
Claims21
A method for dyeing a continuously traveling cellulosic substrate, consisting of:
- (a) cationizing a cellulosic substrate, wherein the cellulosic substrate comprises cotton, rayon, linen, or combinations thereof and includes a top surface and a bottom surface and wherein the cellulosic substrate is cationized by applying a liquid composition comprising 2,3-epoxypropyltrimethylammonium chloride;
- (b) collecting the cellulosic substrate by a wrapping-and-rolling step performed by wrapping the substrate onto an uptake roll and rotating the substrate on the uptake roll from about 1 to 12 hours;
- (c) applying a foam composition comprising a dye amount of one or more dyes comprised of fiber-reactive dyes, direct dyes, or combinations thereof, wherein the foam composition is applied in the absence of added sodium chloride or sodium sulfate salts via at least one applicator head in which each applicator head has a parabolic distribution chamber and a head slot that is disposed transversely with the continuously traveling substrate such that the foam composition is continuously applied to the traveling substrate through the applicator head, to provide a dyed substrate having between about 95 to 100% of the dye amount from the foam composition bound to the cellulosic substrate;
- and
- (d) optionally:
- (i) generating the foam composition including one or more dyes,
- (ii) washing the cellulosic substrate,
- (iii) steaming the cellulosic substrate,
- (iv) removing liquid from the cellulosic substrate,
- (v) collecting the dyed substrate,
- (vi) steaming the dyed substrate,
- (vii) washing the dyed substrate,
- (viii) removing liquid from the dyed substrate,
- or combinations thereof.
11 more elements
A method for dyeing a continuously traveling cellulosic substrate, consisting of:
- (a) a pre-treatment step performed by cationizing a cellulosic substrate with a liquid composition, wherein the cellulosic substrate comprises cotton, rayon, linen, or combinations thereof and includes a top surface and a bottom surface;
- (b) generating a foam composition including one or more dyes;
- (c) collecting the cellulosic substrate by a wrapping-and-rolling step, the wrapping and rolling step performed by wrapping the substrate onto an uptake roll and rotating the substrate on the uptake roll from about 1 to 12 hours;
- (d) a dyeing step performed by applying the foam composition to at least one surface of the continuously traveling substrate, the foam composition being applied to the at least one surface of the continuously traveling substrate via at least one applicator head comprising a parabolic distribution chamber and a head slot that is disposed transversely with the continuously traveling substrate such that the foam composition is continuously applied to the traveling substrate through the applicator head to provide a dyed substrate having between about 95 to 100% of the dye amount from the foam composition bound to the cellulosic substrate;
- and
- (d) optionally:
- (i) washing the cellulosic substrate,
- (ii) steaming the cellulosic substrate,
- (iii) removing liquid from the cellulosic substrate,
- (iv) collecting the dyed substrate,
- (v) steaming the dyed substrate,
- (vi) washing the dyed substrate,
- (vii) removing liquid from the dyed substrate, or combinations thereof.
10 more elements
Dependencies are inferred from the claim text.