Waterless dyeing device and method for bobbin yarn, and product

Abstract

A waterless dyeing device for cone yarn, a waterless dyeing method and a produce are provided; wherein the device comprising: a dye autoclave (1); a dyeing autoclave (2); a recycle autoclave (6); a dyeing circulation system in which the dye autoclave (1), the dyeing autoclave (2) and the recycle autoclave (6) are in fluid communication with; wherein further comprises: a cone yarn inlet formed on the top of the dyeing autoclave (2), which is provided with a sealing cap (7); a cone yarn center shaft (10) vertically disposed at the center inside the dyeing autoclave, which is a perforated outlet tube with fluid discharge holes opened on the side wall; an intake pipe (13) disposed on the bottom of the dying autoclave (2) which is in communication with the cone yarn center shaft (10); a dyeing autoclave outlet (9) disposed on the dying autoclave (2); and a CO2 container (4), a pressure pump, a circulation pump (3) and conduits which are included in the dyeing circulation system. The dyes are disposed in the dye autoclave (1) and the cone yarns are disposed inside the dyeing autoclave (2), CO2 is introduced into the dye autoclave (1) to dissolve the dyes gradually, and the CO2 carrying the dyes to the dyeing autoclave (2) to dye and diffuse. The present invention has the advantages of being high in production efficiency, even in dyeing effect and high in safety, and is suitable for waterless dyeing of polyester cone yarns.

Claims

1. A waterless dyeing device for cone yarn comprising: a dye autoclave; a dyeing autoclave; a recycle autoclave; a dyeing circulation system that is in fluid communication with the dye autoclave, the dyeing autoclave and the recycle autoclave; a cone yarn inlet formed on the top of the dyeing autoclave, which is provided with a sealing cap; a cone yarn center shaft vertically disposed at the center inside the dyeing autoclave, which is a perforated outlet tube with fluid discharge holes opened on the side wall; an intake pipe disposed on the bottom of the dyeing autoclave which is in communication with the cone yarn center shaft; a dyeing autoclave outlet disposed on the dyeing autoclave; and a CO.sub.2 container, a pressure pump, a circulation pump and conduits which are included in the dyeing circulation system; wherein the dye autoclave includes three or more dye containers disposed in parallel, and an intake disposed on the bottom of each of the dye containers has a valve configured to control fluid amount; the CO.sub.2 container is respectively connected to each of the valves on the intakes of the dye containers through conduits and an outlet of each of the dye containers are in communication with the intake pipe of the dyeing autoclave through conduits; the dyeing autoclave outlet is in communication with a circulation pump through conduits, and the circulation pump is respectively connected to each of the valves on the intakes of each of the dye containers; a branch joint of the dyeing autoclave outlet is connected to the recycle autoclave through conduits and over a pressure release valve, the recycle autoclave is connected to a condenser through conduits, the condenser is in communication with the CO.sub.2 container, and the CO.sub.2 container is connected to the pressure pump; each of the dye containers is provided with a heating jacket and electrical heating wires are wound on the conduits connected to the dye containers; wherein the dyeing autoclave is a cylindrical autoclave vertically placed, and a self-sealing coil is disposed on the sealing cap; a sealing ring underneath cone yarn surrounding the cone yarn center shaft is disposed on the bottom surface inside the dyeing autoclave, the dyeing autoclave outlet is disposed on the upper portion of the side wall of the dyeing autoclave; and wherein the recycle autoclave is an elongated cylindrical autoclave, and within which a three-dimensional duplex strainer is arranged.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a flow chart of a waterless dyeing device for cone yarn according to an embodiment of the present invention;

(2) FIG. 2 is a schematic view of a dyeing autoclave of a waterless dyeing device for cone yarn according to an embodiment of the present invention.

(3) Wherein in FIG. 1 and FIG. 2, 1—dye autoclave; 2—dyeing autoclave; 3—circulation pump; 4—CO.sub.2 container; 5—condenser; 6—recycle autoclave; 7—sealing cap; 8—self-sealing coil; 9—dyeing autoclave outlet; 10—cone yarn center shaft; 11—side wall of dying autoclave; 12—sealing ring underneath cone yarn; 13—intake pipe.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(4) Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings FIG. 1 and FIG. 2. A waterless dyeing device for cone yarn comprises a dye autoclave 1, a dying autoclave 2 and a recycle autoclave 6, further includes a dyeing circulation system in which the dye autoclave 1, the dyeing autoclave 2 and the recycle autoclave 6 are in fluid communication with. The dyeing autoclave 1 includes a cone yarn inlet on the top which is provided with a sealing cap 7. A cone yarn center shaft 10 is vertically disposed at the center inside the dyeing autoclave 2, and the cone yarn center shaft 10 is a perforated outlet tube with fluid discharge holes opened on the side wall. An intake pipe 13 is disposed on the bottom of the dying autoclave 2, which is in communication with the cone yarn center shaft 10 (the outlet tube). A dyeing autoclave outlet 9 is disposed on the dying autoclave 2. The dyeing circulation system further comprises a CO.sub.2 container 4, a pressure pump, a circulation pump 3 and conduits.

(5) Specifically, the dye autoclave 2 includes three dye containers in parallel, an intake disposed on the bottom of each of the three dye containers is provided a valve configured to control fluid amount. The CO.sub.2 container 4 is respectively connected to each of the valves on the intakes of each of the three dye containers through conduits, and an outlet of each of the three dye containers is in communication with the intake pipe 13 of the dyeing autoclave 2 through conduits. The dyeing autoclave outlet 9 is in communication with a circulation pump 3 through conduits, and the circulation pump 3 is respectively connected to each of the valves on the intakes of each of the three dye containers; a branch joint of the dyeing autoclave outlet 9 is connected to the recycle autoclave 6 through conduits and over a pressure release valve, the recycle autoclave 6 is connected to a condenser 5 through conduits, the condenser 5 is in communication with the CO.sub.2 container 4, and the CO.sub.2 container 4 is connected to the pressure pump. Each of the three dye containers is enveloped with a heating jacket and those conduits connected to the dye containers are being wound on by electrical heating wires.

(6) The dyeing autoclave 2 is a cylindrical autoclave vertically placed, and a self-sealing coil 8 is disposed on the sealing cap 7. A sealing ring underneath cone yarn 12 surrounding the cone yarn center shaft 10 (the outlet tube) is disposed on the bottom surface inside the dyeing autoclave 2. The dyeing autoclave outlet 9 is disposed on the upper portion of the side wall 11 of the dyeing autoclave 2.

(7) The recycle autoclave 6 is an elongated cylindrical autoclave, and within which a three-dimensional duplex filter is arranged.

(8) Referring to FIG. 1 and FIG. 2, a waterless dyeing method using the aforementioned waterless dyeing device is provided, which includes pretreatment and dyeing. To be specific, the dyeing comprises the following steps:

(9) Step 1: selecting a dye or a dye combination; drying and grounding the selected dyes which were purified; weighing required dyes and put them in corresponding dye containers respectively; adjusting the opening amount of each of the valves on the intake of the dye container according to the solubility of the dyes in supercritical CO.sub.2 fluid; arranging the cone yarns after pretreatment within the dyeing autoclave and mounting the cone yarn on the cone yarn center shaft.

(10) Step 2: activating the pressure pump and guiding CO.sub.2 into the dye containers; starting the heating jackets and the electrical heating wires and keeping them working until the temperature and pressure inside the dye containers reaching to set values, starting the circulation pump; at this point, the dyes begin to dissolve and flow with CO.sub.2 fluid to the dyeing autoclave for dyeing and diffusing, which is going to last for a period of time.

(11) Step 3: carrying out a recycle and separation process: opening the pressure release valve and introducing the fluid into a separating autoclave for separation; the separated CO.sub.2 is guided to enter into the condenser within which CO.sub.2 turns into liquid and being recovered in the CO.sub.2 container.

(12) Step 4: opening the dyeing autoclave and taking out the cone yarns after dyeing.

(13) Specifically, in the Step 1, the dyes are preferably disperse dye press cakes; firstly dissolving the disperse dye in organic solvents, and then filtering, drying, and grounding to obtain required high solubility disperse dyes with a purification degree higher than 99.7%; the D50 dye is preferably selected with a granularity of 0.05 mm, the cone yarn is polyester cone yarn, such as polyester filament or polyester staple yarn.

(14) In the Step 2, the set value of pressure in the dye containers lays between 8 MPa to 30 MPa and the set value of temperature in the dye containers lays between 60° C. to 120° C. The circulation dyeing time on the cone yarns at the dyeing pressure and temperature is 50 minutes to 360 minutes. The supercritical fluid containing dyes is in full contact with the dyes loaded within the dye autoclave in circulating at first and then effect the dyeing of cone yarns in the dyeing autoclave, so as to realize a diffusion-absorption-desorption dyeing process.

(15) In the Step 3, after dyeing the fluid firstly flows through the separation autoclave to release pressure, and then starts the process of gas-solid separation. As the pressure is being released, the supercritical CO.sub.2 turns into gaseous CO.sub.2 and accompanying impurities are precipitated. The gaseous CO.sub.2 passes through a 3D dimensional duplex filter and stored in the CO.sub.2 container for the next cycle.

(16) Preferably, the diameter-height ratio of the above-mentioned polyester cone yarn is in the range from 0.5:1 to 1.4:1.

(17) Further, a cone yarn which is produced by the aforementioned waterless dyeing method is provided, wherein the cone yarn could be polyester filament yarn or polyester staple yarn.

(18) Further, a textile which is produced by the above-mentioned polyester filament yarn is provided, wherein the textile includes textile fabrics, garment products, shoes, caps, accessories and the like.

(19) The textile fabrics include pure polyester knitted fabrics, pure polyester woven fabrics, fabrics interwoven with other yarns or composite fabrics.

(20) Garment products comprise knitted underwear, shirts, sportswear, uniforms, skirts, jackets, suits, and the like.

(21) Accessories include tie, scarf and the like.

(22) The test results of various performance indicators of the product produced by the method or device disclosed by the present invention:

(23) First of all, GB/T.3921.1-1997 Textiles—Tests for color fastness—Color fastness to washing: Test 1; GB7565-87 Textiles—Tests for color fastness—Specification for STANDARD adjacent fabric—Cotton and viscose and GB/T 6151-1997 Textiles-Tests for color fastness—General principle of testing are used to evaluate the color fastness of the textile fabrics produced on the basis of the disclosure by the present invention. The result shows that the color fastness to rubbing or washing of the textile fabrics dyed by the present invention are satisfied with the requirements of GB18401-2003 National general safety technical code for textile products, and the abrasion color fastness can reach to 3 to 4 grades, the color fastness to washing can reach to 4 to 5 grades.

(24) Secondly, GB/T 3979-1997 Methods for the measurement of object color is used to evaluate the color difference of the textile fabrics produced on the basis of the disclosure by the present invention: observing the color difference A£ at three different positions which respectively distributed on the inside surface, in the middle part or on the outside surface of the textile fabrics in weaving by the cone yarn. The result shows that the measured color difference A£ is in a range from 0.5 to 0.7 between the three positions, which lower than any color difference grade. The above test results prove that: the products produced on the basis of the disclosure of the present invention could fully meet the requirements of relevant national quality standards, and suitable for the mass production of polyester cone yarn.

(25) While the invention has been specifically described in connection with certain specific embodiments thereof, it is to be understood that this is by way of illustration and not of limitation. Reasonable variation and modification are possible within the scope of the forgoing disclosure and drawings without departing from the spirit of the invention which is defined in the appended claims. This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.