Abstract: Provided is a natural dyeing method of a fiber using an indigo plant. The natural dyeing method includes dissolving a water-soluble pigment present in leaves of the indigo plant in water to mix the water containing the water-soluble pigment with lime powder and air, concentrating the resulting mixture into an insoluble pigment, mixing the concentrated indigo plant dye with caustic soda to reduce the resulting mixture into a water-soluble pigment through microbial fermentation, immersing a fiber in the soluble indigo plant dye solution to dye the fiber, and bringing the dyed fiber into contact with air to convert the soluble indigo plant dye solution into the insoluble pigment again, thereby completing natural dyeing using the indigo plant. Therefore, the natural dyeing can be performed at a very fast dyeing rate, and the fiber can show excellent color fastness. Also, the fiber cannot be easily discolored by water or detergent, and can be useful in preventing water pollution or dermatitis.

Abstract: A dyeing apparatus and method for continuous dyeing of a fabric article with dye, the apparatus including: (a) a dyeing vessel for containing a high-density liquid; (b) a heating mechanism, thermally associated with the dyeing vessel, for heating a dye fixation zone within the vessel to a temperature above 70° C.; (c) a continuous transport mechanism for continuously transporting the fabric article, through a dye impregnation chamber, and through the dye fixation zone of the dyeing vessel, and (d) a dye-dispensing mechanism for delivering a dye liquor within the dye impregnation chamber, so as to impregnate with the dye, the fabric article passing through the chamber, and wherein the dyeing vessel is dimensioned and configured such that a height of the high-density liquid delivers a hydrostatic pressure of at least 0.1 bar gauge to the dye fixation zone, so as to effect fixation of the dye in the fabric article.

Abstract: A process for improving the properties of knit fabrics containing bicomponent polyester fibers, by heat-setting the fabrics, while stretched cross-directionally, prior to dyeing, is provided.

Abstract: Textiles made of synthetic fibers and synthetic fiber blended fabrics are constructed in the form of a garment then dyed while avoiding setting permanent creases and permanent wrinkles in the garment. The process includes selecting a synthetic or synthetic blended fabric for the dyeing process by determining the fabric's shrinkage in the warp and fill directions, for instance no greater than 6%, constructing a garment from the fabric selected, then dyeing the constructed garment in an aqueous dyebath at a temperature in the range of 220 to 260° F. for a time sufficient to achieve a desired shade and levelness of color followed by drying and optionally pressing the dyed garment.

Abstract: The invention relates to a process for dyeing a thread with indigo, characterized in that it comprises the following steps:a. prewashing a thread F by passing it through a prewash arrangement (1) comprising two or more tanks (2) containing a prewash solution (10, 15);b. then dyeing the thread by passing it through a dyeing arrangement (30) comprising a series of tanks (35) each containing a solution of reduced indigo, and when passing from one tank (35) to another, the thread is subjected to oxidation by exposure to the air transforming the reduced indigo into indigo, which then dyes the thread by impregnation, the oxidation by exposure to the air being achieved in such a way that when passing from the first tank (35) to the eighth in succession, if the value x is given to the oxidation between the first and second tanks, the result will be:After the 8th tank the oxidation value=8x;c. washing and initial drying the thread by passing it through a washing and initial drying arrangement (40).d.

Abstract: A method and apparatus for pattern dyeing of textile substrates in which the dyeing is done in two stages. In the first stage, a dye is uniformly applied in a manner that allows the dye to fix on contact. The uniformly dyed substrate is then moved under a series of spaced arrays, each array being associated with a separate color and being comprised of a plurality of individually controlled liquid dye applicators. Liquid dye of a given color is selectively applied through one or more dye applicators as the substrate passes under the array associated with that color. The applied dye remains unfixed until the substrate passes under all the arrays and the patterning is complete, whereupon all dye applied by the dye applicators is fixed by steaming or other appropriate application of energy to the substrate.

Abstract: The present invention relates to a process for the continuous dyeing of cellulose fibre yarns with reactive dyes and to an apparatus for carrying out this process.The process essentially comprises steps of impregnating yarn which has been continuously unwound at high speed from one or several supports (1) and rewound onto one or several supports (3) with at least one fibre-reactive dye in aqueous solution and at least one alkaline reagent in aqueous solution, and fixing the dye.The invention can be applied especially in the technical field of dyeing cellulose fibres.

Abstract: The invention is a method of producing a melt spun synthetic polymeric filament which has the superior deep dyeability thereof. The method includes the steps of application of a dye dispersed in water to the filaments during the drawing of the filament, and heat setting the surface dyed filaments to uniformly diffuse the dye throughout the total cross section of the filaments.

Abstract: A method, apparatus, and related dye compositions for dyeing textiles which operates at atmospheric pressures, is open to the atmosphere, and does not require the steaming of the textile to set or fix the dye to the textile; specifically, a multi-temperature textile dyeing method which achieves a more complete and even dyeing of the textile in a shorter period of time.

Abstract: A method of dyeing a webbing of a seat belt device having a step of padding a dye to a raw material for a webbing and a subsequent step of introducing the webbing into a hot blow furnace and color developing, wherein a webbing in a moistened state by padding of the dye is introduced into a hot blow furnace and drying and color development are conducted in the hot blow furnace.

Abstract: A method and apparatus which utilizes a novel dye solution for dyeing carpet in which the dye solution is heated to a temperature higher than the boiling point of water thus allowing fixation of the dye on the carpet without the need for a steam fixator.

Abstract: A dyeing method for dyeing plastic lenses or the like employed as lenses for eye glasses and exhibiting excellent dyeability. The lens is dipped into a dyeing solution while being moved by a combination of a small-amplitude short-cycle time up and down reciprocating motion superimposed on a large-amplitude long-cycle time up and down reciprocating motion. The lens is minutely oscillated according to the small-amplitude short-cycle time up and down reciprocating motion while being periodically moved up and down in the dyeing solution according to the large-amplitude long-cycle time up and down reciprocating motion. The lowest position of the lens obtained by the large-amplitude long-cycle time up and down reciprocating motion is raised gradually. Also disclosed is a dyeing apparatus which is used to carry out that dyeing method.

Abstract: The invention is concerned with a method of producing in-line dyed fibers, in a gel state, characterized in that it essentially consists of extruding the spinning dope in a coagulum bath, stretching the resulting filaments, scrubbing said filaments to remove residual solvent, passing the resulting filament tow through a dyeing bath at an overall rate in excess of 4 cm.sup.3 bath per second per square centimeter of tow surface area. The overall rate, being preferably in the 4 to 10 cm.sup.3 /sec per cm.sup.2 range, is achieved by means of crossflows to the forward advance direction of said tow, and alternately directed to and from said tow, the tow residence time in the dyeing bath being no longer than 5 seconds. The tow is then subjected to a dye fixing heat treatment, and is then scrubbed, finished, and dried. The method is particularly suitable for use with substantially acrylic and modacrylic fibers.

Abstract: The method of dyeing a continuously moving carpet pile fabric with a base color and thereafter applying other color dyes onto the base color and fixing all of the dyes without the use of steam. The dyeing process employs a dye applicator to which a heated dye solution is supplied and this dye is sprayed onto the carpet while at a temperature of approximately 185.degree. F. to 205.degree. F. to provide the base color. The base color dye is applied with a wet pick-up of approximately 200 percent to 300 percent. Thereafter while the carpet is still hot from the wetting by the hot dye, other color dyes at substantially ambient temperatures are independently sprayed onto the carpet at spaced locations while the carpet is still in the temperature range of approximately 165.degree. F. to 175.degree. F. The total amount of additional dye applied subsequent to the base color dye provides a wet pick-up of approximately 120 percent.

Abstract: The method of dyeing a continuously moving carpet pile fabric with a heated base color dye and either thereafter applying other color dyes onto the base color or applying the other color dyes prior to the base color, all of the dyes being fixed by the heat of the base color dye and without the use of steam. The dyeing process employs a dye applicator to which is heated dye solution is supplied and this dye is sprayed onto the carpet while at a temperature of approximately 185.degree. F. to 205.degree. F. to provide the base color. The base color dye is applied with a wet pick-up of approximately 200 percent to 300 percent. The other color dyes, which are pattern colors, at substantially ambient temperatures are independently sprayed onto the carpet at spaced locations either before the heated dye is applied or subsequent to the hot dye while the carpet is still in the temperature range of approximately 165.degree. F. to 175.degree. F.

Abstract: The very economical padding methods for applying liquid treatment agents and which have largely become established for flat-lying material are also interesting for dyeing and finishing tubular textile material. In the latter case, the use of this technique is however opposed by the finding that on impregnating circular-knitted goods on a pad mangle the squeeze edges are marked on both sides of the tube, which gives rise, for example, to undesirable color differences. According to the invention, this adverse phenomenon and the problems arising therefrom can be avoided if, through maintaining a relatively high liquor pick-up by the textile material and through mechanical shifting of the edges, the liquor is enabled to level out any unevenness produced on squeezing.

Abstract: Process for dyeing cellulose fibres and textile materials containing cellulose fibres with water-soluble reactive dyestuffs by the exhaustion method, characterized in that it is carried out using dye liquors, the particular fibre-reactive reactive dyestuff content of which is less than 10% of the total content of fixed dyestuff in the end dyeing.

Abstract: An improved process for dyeing of diverse fibre material, especially textile fibres, by applying to the fibre material at a temperature below the absorption temperature of the dyestuffs a concentrated aqueous dye liquor and with a goods to liquor ratio of 1:1.5 to 1:4, the said aqueous dye liquor containing at least one dyestuff which, in the case of the substrate to be dyed, has affinity to the fibres and which is either soluble or dispersible in water and 0.2 to 10 g/l, preferably 2 to 5 g/l, of a non-foaming anionic dispersing agent from the class of aromatic sulphonic acids or the water-soluble salts thereof, and finishing of the dyeing by means of a heat treatment, e.g. introduction of saturated steam, superheated steam or hot air, preferably by heating from without, at temperatures of 95.degree. to 140.degree. C.