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US 7,235,110 B2Granted
Method for dyeing fabric materials with indigo, other vat dyes, and sulfur dyes
OwnerMelvin Alpertinventor
Life of this patent
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Abstract
A method for surface dyeing a range of textile materials, in the form of yarn, fabric, or garments, includes: a) preparing a dyebath including dye particles and an additive, such as an anionic acrylic copolymer, causing the particles to become charged; b) preparing the textile material by applying an additive, such as a cationic polyamide, forming a substrate with a charge attracting the particles, c) immersing the textile material in the dyebath; d) chemically reducing the dye particles retained on the textile material to a leuco form; and e) oxidizing the dye material.
Claims33
A method for dyeing a textile material, wherein the method comprises:
- a) preparing a dyebath including pigment particles of a vat dye or of a sulfur dye and a first additive causing the pigment particles to become electrically charged in a first polarity;
- b) preparing the textile material for dyeing by applying a second additive to the textile material to form a substrate on the textile material having an ionic charge with a polarity opposite the first polarity;
- c) immersing the textile material prepared in step b) in the dyebath prepared in step a) to cause the pigment particles to be ionically attracted to the substrate and retained thereon;
- d) chemically reducing the pigment particles retained on the substrate to form a reduced form of the pigment particles entering the textile material;
- and
- e) oxidizing the reduced form of the pigment particles to form pigment within the textile material.
3 more elements
Dependencies are inferred from the claim text.