Back to results
US 4,121,899 AGranted
Condensation dyeing
AssigneeMilliken Research Corporation
InventorsThomas Van Chambers, Julian J. Hirshfeld
Life of this patent
Estimating the term…
Abstract
Fibers are dyed by applying an aqueous dyeing formulation to the fibers, cooling them and condensing halogenated hydrocarbon vapors upon the cool, wet fibers. Residual halogenated hydrocarbon is removed by exposing the fibers to heat.
Claims35
A method of dyeing fibers, which comprises the steps of:
- applying an aqueous dyeing formulation containing a dyestuff which is suitable for dyeing said fibers to the fibers;
- cooling the fibers while still wet to a first temperature;
- exposing the cooled, undried fibers to vapors of a halogenated hydrocarbon having a boiling point which is higher than said first temperature, the boiling point of said halogenated hydrocarbon being between 25.degree. C. and 65.degree. C.;
- and
- condensing said halogenated hydrocarbon on the fibers to promote dyeing;
- and
- removing said halogenated hydrocarbon from the fibers.
4 more elements
A method of dyeing fabrics which are blends of polyester and another fiber, comprising the steps of:
- applying an aqueous dyeing formulation to the fabric, said dyeing formulation containing a first dyestuff which is suitable for dyeing polyester and a second dyestuff which is suitable for dyeing the other fiber;
- and a coacervating agent;
- cooling the wet fabric to a first temperature;
- exposing the cooled, undried fabric to vapors of a halogenated hydrocarbon having a boiling point which is higher than said first temperature, the boiling point of said halogenated hydrocarbon being between 25.degree. C. and 65.degree. C. and condensing said halogenated hydrocarbon on the fabric to promote dyeing;
- and
- removing said halogenated hydrocarbon from the fabric.
3 more elements
Dependencies are inferred from the claim text.