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US 11,377,789 B2Granted
Water-free fabric dyeing process and dye compositions
AssigneeGreen Theme Technologies Inc.
InventorsGary S. Selwyn, Chris B. Cooper, Aaron T. Caudill
Life of this patent
Estimating the term…
Abstract
A non-aqueous fabric dyeing method using a non-aqueous dyeing composition is described. The dyeing composition is a fluid at room temperature; contains no more than 5% water, no more than 5% VOCs and no more than 2.5% by weight vinyl monomers. The dye composition includes an organic dye that is solid at temperatures up to 130° C. and which sublimes or boils at 130 to 220° C., and further includes a carrier that is a liquid in the temperature range of 130 to 220° C.
Claims13
A fabric dyeing process comprising the steps of:
- A. at a temperature of 10 to 100° C., applying a fluid dye composition using a non-immersive method to at least one surface of a fabric at an application weight of 2.5 to 250 grams of the dye composition per square meter of fabric, wherein the dye composition comprises a) a carrier phase that is liquid in the temperature range of 20° C. to 220° C.;
- said carrier phase having dissolved or suspended therein b) 2.5 to 300 grams, per liter of the dye composition, of at least one organic dye that is solid at temperatures below 130° C. and has a sublimation or boiling temperature of 130° C. to 220° C., and
- B. curing the dye composition by heating the fabric with the applied dye composition to a temperature at least equal to the boiling or sublimation temperature of the at least one organic dye for a period of at least 30 seconds, such that the dye boils or sublimes and at least a portion thereof penetrates into the fabric,
- wherein the dye composition contains no more than 5% by weight water, no more than 5% by weight of volatile organic compounds and no more than 2.5% by weight of vinyl monomers, and the dye composition has a viscosity of at least 50 centistokes to at most 5000 centistokes at 25° C.,
- wherein in step A the fabric is moved continuously through a dye application station where the dye composition is applied to the fabric and the dye is applied with a gravure coater.
2 more elements
A fabric dyeing process comprising the steps of:
- A. at a temperature of 10 to 100° C., applying a fluid dye composition using a non-immersive method to at least one surface of a fabric at an application weight of 2.5 to 250 grams of the dye composition per square meter of fabric, wherein the dye composition comprises a) a carrier phase that is liquid in the temperature range of 20° C. to 220° C.;
- said carrier phase having dissolved or suspended therein b) 2.5 to 300 grams, per liter of the dye composition, of at least one organic dye that is solid at temperatures below 130° C. and has a sublimation or boiling temperature of 130° C. to 220° C., and
- B. curing the dye composition by heating the fabric with the applied dye composition to a temperature at least equal to the boiling or sublimation temperature of the at least one organic dye for a period of at least 30 seconds, such that the dye boils or sublimes and at least a portion thereof penetrates into the fabric,
- wherein the dye composition contains no more than 5% by weight water, no more than 5% by weight of volatile organic compounds and no more than 2.5% by weight of vinyl monomers, and the dye composition has a viscosity of at least 50 centistokes to at most 5000 centistokes at 25° C.,
- wherein in step A the fabric is moved continuously through a dye application station where the dye composition is applied to the fabric, the fabric with applied dye composition is formed into a roll, and step B is performed on the roll in a closed vessel.
2 more elements
Dependencies are inferred from the claim text.