Continuous yarn dyeing: uniformly coating running yarn with dye liquid, drying and fixing with heat
AssigneeJ. & P. Coats Limited
InventorRonald B. Love
Life of this patent
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Abstract
A process for continuously dyeing yarn comprises coating the surface of a continuously moving yarn with a uniform coating of dye liquid deposited at a rate such that the amount of dye liquid deposited per unit area of yarn surface is less than the same unit area of the yarn absorb naturally then heating the coated yarn so as first to remove substantially all the liquid from the dye and then to cause the dye to penetrate and become fixed in the yarn.
Claims8
A process for continuously dyeing yarn which comprises continuously coating a moving yarn with a uniform coating of dye liquid deposited on the surface of the yarn at a rate such that the amount of dye liquid applied per unit of surface area of the yarn fibres is less than the minimum natural sorptive ability of the same unit of surface area of the yarn fibres to take up dye, and heating the coated yarn first to cause any liquid present in the dye coating on the surface of the yarn to be substantially removed then to cause the dye to penetrate below the surface of the yarn and become fixed in the yarn.
Dependencies are inferred from the claim text.