CN111235920A - Dyeing process of regenerated polyester - Google Patents
Dyeing process of regenerated polyester Download PDFInfo
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- CN111235920A CN111235920A CN202010072440.3A CN202010072440A CN111235920A CN 111235920 A CN111235920 A CN 111235920A CN 202010072440 A CN202010072440 A CN 202010072440A CN 111235920 A CN111235920 A CN 111235920A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/39—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using acid dyes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/653—Nitrogen-free carboxylic acids or their salts
- D06P1/6533—Aliphatic, araliphatic or cycloaliphatic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/34—Material containing ester groups
- D06P3/52—Polyesters
- D06P3/521—Polyesters using acid dyes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
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Abstract
The invention provides a dyeing process of regenerated terylene, which is characterized by comprising the following steps: (1) high-temperature presetting: performing high-temperature presetting on the regenerated polyester fabric; (2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) by using an oil removal agent; (3) dyeing: placing the regenerated polyester fabric subjected to pretreatment and oil removal in the step (2) into a dye solution for dyeing; (4) cleaning: introducing water into the dyeing solution subjected to dyeing in the step (3), and cooling and cleaning the dyed regenerated polyester fabric; (5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4). The dyeing process of the regenerated polyester solves the defect of unstable dyeing color light caused by much knitting oil on the surface of the regenerated polyester fabric, and solves the problems of low strength and poor color fastness of the regenerated polyester fabric.
Description
Technical Field
The invention belongs to the technical field of textile printing and dyeing, and relates to a dyeing process of regenerated terylene.
Background
The regenerated Polyester (recycled Polyester) is Polyester fiber prepared by crushing, cleaning and melt spinning waste Polyester bottle chips. The polyester fiber is more environment-friendly, is gradually accepted by the market and has wide development prospect. Some international famous brands also choose the regenerated polyester fiber as the raw material to develop new products for popularization. However, the regenerated polyester has high oil content and high rigidity, and has inferior strength and heat resistance to common polyester, which brings certain difficulty to the post-processing. The dyed color of the regenerated terylene is not as bright as that of the common terylene, and the risk of dyeing color difference exists, such as improper process control, easy dyeing and even transverse dyeing.
CN102199885A discloses a dyeing and finishing method of fabric, in particular to a dyeing and finishing method of regenerated fabric, especially to a dyeing and finishing method of regenerated polyester fabric. The invention also relates to a regenerated polyester fabric. A dyeing and finishing method of a regenerated polyester fabric comprises the following steps of: a) and a pretreatment step; b) and a dyeing step; c) and a cleaning step; d) and heat setting; e) and a napping process; the dyeing temperature of the dyeing process is 120-135 ℃, however, the oil content of the regenerated terylene is high, the pretreatment process of the dyeing and finishing method cannot effectively remove oil from the regenerated terylene stretch fabric, and dyeing color difference is easily caused, so that the difficulty of subsequent processing is increased.
CN106048932A discloses a dyeing method of regenerated polyester fabric, which comprises the following steps: A. pretreatment: pouring the degreasing agent into a dye vat, heating to remove oil; B. dyeing-reduction washing: adding water and an auxiliary agent into a dye vat, adding the well-prepared dye to form a dyeing solution, heating for dyeing, adding a reduction washing solution for washing, and finally draining water from the dye vat and washing with water; C. shaping of a finished product: and controlling the setting temperature to be 150-170 ℃ and rolling the fabric by a hydrophilic groove padder. However, the regenerated polyester fabric treated by the dyeing method has the risk of dyeing color difference, and is easy to dye and even to stretch.
Therefore, there is a need to develop a dyeing and finishing process suitable for regenerated polyester fabrics to solve the quality problems of color spots, scutching, poor fastness and the like existing after the current regenerated polyester is dyed and finished.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a dyeing process of regenerated terylene, which solves the defect of unstable dyeing color light caused by much knitting oil on the surface of regenerated terylene fabric, adopts acid dyeing liquid for dyeing, adopts different temperature programming according to different depth dyes, and solves the problems of lower strength and poorer color fastness of the regenerated terylene fabric.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a dyeing process of regenerated terylene, which comprises the following steps:
(1) high-temperature presetting: performing high-temperature presetting on the regenerated polyester fabric;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) by using an oil removal agent;
(3) dyeing: placing the regenerated polyester fabric subjected to pretreatment and oil removal in the step (2) into a dye solution for dyeing;
(4) cleaning: introducing water into the dyed dye solution obtained in the step (3), and cooling and cleaning the dyed regenerated polyester fabric;
(5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4).
In the invention, the dyeing process of the regenerated terylene is high-temperature presetting → pretreatment degreasing → dyeing → cleaning → shaping. The high-temperature presetting can reduce or eliminate uneven tension generated in spinning drafting and weaving processing of the regenerated polyester elastic fabric, and can avoid excessive relaxation and curling of the regenerated polyester elastic fabric to cause dyeing and dyeing. Due to the instability of the dry heat shrinkage rate or the boiling water shrinkage rate of the regenerated polyester, different shrinkages can be generated during the heating treatment of printing and dyeing processing, so that the width of cloth is different, and irregular strip-shaped crease is formed. Therefore, the heat setting process of the regenerated polyester knitted fabric is more strictly controlled than that of the common polyester knitted fabric.
The regenerated terylene (as shown in figure 2) has high oil content, and compared with the original terylene (as shown in figure 3), the regenerated terylene has poor whiteness and luster and is dull and dull. The dyeing process is easy to lead disperse dye to gather to generate color points, and the oil removal process needs to be carried out on the regenerated terylene stretch fabric to ensure the dyeing quality.
Preferably, the high temperature pre-setting in step (1) is performed at 180 to 190 ℃, for example, 180 ℃, 181 ℃, 182 ℃, 183 ℃, 184 ℃, 185 ℃, 186 ℃, 187 ℃, 188 ℃, 189 ℃, 190 ℃, preferably 185 ℃.
Preferably, the high temperature presetting time in the step (1) is 30-40 s, such as 30s, 31s, 32s, 33s, 34s, 35s, 36s, 37s, 38s, 39s, 40 s.
Preferably, the oil removing agent in the step (2) is an oil removing agent LYS.
Preferably, the dosage of the oil remover LYS is 1-3 g/L, for example, 1g/L, 1.2g/L, 1.4g/L, 1.6g/L, 1.8g/L, 2g/L, 2.2g/L, 2.4g/L, 2.6g/L, 2.8g/L, 3g/L, and preferably 2 g/L.
Preferably, the temperature of the oil removal in the step (2) is 65 to 75 ℃, for example, 60 ℃, 62 ℃, 64 ℃, 66 ℃, 68 ℃, 70 ℃, 72 ℃, 74 ℃, 76 ℃, 78 ℃, 80 ℃, preferably 70 ℃.
Preferably, the time for removing the oil in the step (2) is 10-20 min, for example, 10min, 11min, 12min, 13min, 14min, 15min, 16min, 17min, 18min, 19min, 20min, preferably 15 min.
Preferably, the dye liquor in the step (3) comprises the following components by mass:
in the dye liquor of the invention, the mass concentration of the dye is 0.1-10% (o.w.f), and may be, for example, 0.1% (o.w.f), 0.2% (o.w.f), 0.3% (o.w.f), 0.4% (o.w.f), 0.5% (o.w.f), 0.6% (o.w.f), 0.7% (o.w.f), 0.8% (o.w.f), 0.9% (o.w.f), 1% (o.w.f), 2% (o.w.f), 3% (o.w.f), 4% (o.w.f), 5% (o.w.f), 6% (o.w.f), 7% (o.w.f), 8% (o.w.f), 9% (o.w.f), 10% (o.w.f).
In the dye liquor, the mass concentration of the buffer solution is 0.5-2 g/L, for example, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1.0g/L, 1.1g/L, 1.2g/L, 1.3g/L, 1.4g/L, 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L and 2 g/L.
In the dye solution, the mass concentration of the leveling agent is 0.5-2.5 g/LL, and can be, for example, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1.0g/L, 1.1g/L, 1.2g/L, 1.3g/L, 1.4g/L, 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L, 2g/L, 2.1g/L, 2.2g/L, 2.3g/L, 2.4g/L and 2.5 g/L. The leveling agent can slow down the dyeing rate of the disperse dye, play a role in leveling and reduce the risk of dyeing flowers.
In the dye liquor, the mass concentration of the swelling agent is 0.5-2 g/L, preferably 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1.0g/L, 1.1g/L, 1.2g/L, 1.3g/L, 1.4g/L, 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L and 2 g/L. The regenerated polyester fiber has complicated raw material source, large change of the intrinsic viscosity range and different impurity content. During spinning, defects such as hard doubling or double coarse fibers are easily generated, and the defects can be broken and scattered through opening and carding during spinning, the number of the defects is increased, the quality of finished yarns is influenced, and transverse defects are easily generated during dyeing. The swelling agent can improve the swelling rate of the regenerated polyester fiber at a lower temperature, 1g/L of the swelling agent OD is most suitable to be added during actual dyeing production, and the problem of the cross-linking of the regenerated polyester fiber can be obviously improved.
In the dye liquor, the mass concentration of the softening agent in the bath is 0.5-2 g/L, and can be 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1.0g/L, 1.1g/L, 1.2g/L, 1.3g/L, 1.4g/L, 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L and 2g/L, for example. The softening agent is a softening agent in a bath, and the function of the softening agent in the bath is to reduce the friction factor of the fabric and equipment, thereby reducing the generation of fabric scratches and crease marks.
Preferably, the dye includes any one of a light color series dye, a medium color series dye, or a dark color series dye.
In the present invention, the dye is independently selected from any one of disperse yellow, disperse red, disperse blue or disperse black or a combination of at least two thereof. The dyes with different shade systems are obtained by adding dyes with different mixture colors.
Preferably, the buffer solution is a mixed solution of acetic acid and sodium acetate.
Preferably, the mass ratio of acetic acid to sodium acetate is (1-3): 1, and may be, for example, 1:1, 1.2:1, 1.4:1, 1.6:1, 1.8:1, 2:1, 2.2:1, 2.4:1, 2.6:1, 2.8:1, 3:1, and preferably 2: 1. In the proportion, the buffer solution can be used for stably adjusting the pH value to be 4.0-4.5, the dyeing effect is good, the dye uptake cannot be influenced, and color difference cannot be caused.
Preferably, the leveling agent is a leveling agent P.
Preferably, the dye is a light-color dye, and the mass concentration of the leveling agent in the dye solution is 1.5-2.5 g/L, such as 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L, 2.0g/L, 2.1g/L, 2.3g/L, 2.4g/L, 2.5g/L, and preferably 2.0 g/L.
Preferably, the dye is a medium-color dye, and the mass concentration of the leveling agent in the dye solution is 1.5-2.5 g/L, such as 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L, 2g/L, 2.1g/L, 2.3g/L, 2.4g/L, 2.5g/L, preferably 1.5 g/L;
preferably, the dye is a dark dye, and the mass concentration of the leveling agent in the dye solution is 1.0-2.5 g/L, such as 1.0g/L, 1.1g/L, 1.2g/L, 1.3g/L, 1.4g/L, 1.5g/L, 1.6g/L, 1.7g/L, 1.8g/L, 1.9g/L, 2g/L, 2.1g/L, 2.3g/L, 2.4g/L, 2.5g/L, preferably 1.0 g/L;
preferably, the swelling agent is a swelling agent OD.
Preferably, the in-bath softener is in-bath softener CN.
Preferably, the pH value of the dye liquor in the step (3) is 4.0-4.5, such as 4.0, 4.1, 4.2, 4.3, 4.4, 4.5.
Preferably, the bath ratio of the dyeing in the step (3) is 1 (5-15), and may be, for example, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, preferably 1: 10.
Preferably, the dyeing temperature in step (3) is 80-130 ℃, for example, 80 ℃, 85 ℃, 90 ℃, 95 ℃, 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃.
Preferably, the specific temperature rise process of the dyeing in the step (3) is as follows: heating to 120-130 deg.C (such as 120 deg.C, 121 deg.C, 122 deg.C, 123 deg.C, 124 deg.C, 125 deg.C, 127 deg.C, 128 deg.C, 129 deg.C, 130 deg.C) at a rate of 0.5-2.0 deg.C/min (such as 0.5 deg.C/min, 0.6 deg.C/min, 0.8 deg.C/min, 0.9 deg.C/min, 1.0 deg.C/min, 1.1 deg.C/min, 1.2 deg.C/min, 1.3 deg.C/min, 1.4 deg.C/min, 1.5 deg.C/min, 1.6 deg.C/min, 1.7 deg.C/min, 1.C/min, 1.9 deg.C/min, 2.C/min), and holding at 50 deg.C for 10-30 min (such as 10min, 12min, 14min, 16min, 18min, 20min, 22min, 24 min.
Preferably, the dyeing in the step (3) adopts a sectional heating dyeing method. Before the step of heating and dyeing in sections, adding a softening agent and a part of leveling agent into the soaked regenerated polyester fabric subjected to pretreatment and oil removal in the step (2) to prepare a working solution, then adding a buffer solution to adjust the pH of the working solution to 4.0-4.5, heating to 50 ℃ at the speed of 3 ℃/min, then adding a dye and the rest of the leveling agent to prepare a dyeing solution, and then performing a step of heating and dyeing with phenolic acid.
The increase of the dyeing temperature can increase the kinetic energy of dye molecules in the dye bath and on the fiber, reduce the aggregation phenomenon of the dye molecules in the dye bath, promote the fiber expansion, facilitate the entry of the dye molecules into the fiber and achieve the purpose of uniform and thorough dyeing. Because the regenerated polyester fiber crystals are not arranged tightly, the dyeing of the regenerated polyester fabric is faster than that of the primary polyester fiber under the same condition. The temperature-raising control dyeing method is characterized by that the temperature-raising rate is strictly controlled according to the dyeing property of dye between the initial dyeing temperature and dyeing equilibrium temperature, and the temperature-raising is slowed down in the temperature range with high dyeing rate, and even the dyeing is heat-preserved for a certain time at said temperature, then the temperature-raising dyeing is continued. In addition, the heating rate is optimized according to the dye uptake of light, medium and dark dyes.
Preferably, the specific temperature rise process of the dyeing in the step (3) is as follows: the specific temperature rise process of the dyeing is as follows: adding a dye solution at the temperature of 50 ℃, heating to 80-100 ℃ at the speed of 1.0-2.0 ℃/min, heating to 100-115 ℃ at the speed of 0.5-1.0 ℃/min, heating to 120-130 ℃ at the speed of 0.8-1.5 ℃/min, and finally keeping the temperature at 120-130 ℃ for 10-30 min;
preferably, the dye in the dye solution in the step (3) is a light color dye, and the specific temperature rise process of the dyeing is as follows: adding dye liquor at 50 deg.C, heating to 80 deg.C at a rate of 2.0 deg.C/min, heating to 100 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1.0 deg.C/min, and holding at 125 deg.C for 15 min;
preferably, the dye in the dye solution in the step (3) is a medium-color dye, and the specific temperature rise process of the dyeing is as follows: adding dye liquor at 50 deg.C, heating to 90 deg.C at a rate of 2.0 deg.C/min, heating to 105 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1.0 deg.C/min, and holding at 125 deg.C for 20 min;
preferably, the dye in the dye solution in the step (3) is a dark dye, and the specific temperature rise process of the dyeing is as follows: adding dye liquor at 50 deg.C, heating to 100 deg.C at 2.0 deg.C/min, heating to 115 deg.C at 0.5 deg.C/min, heating to 125 deg.C at 1.0 deg.C/min, and holding at 125 deg.C for 25 min.
Preferably, the specific process of cooling and cleaning in the step (4) is as follows: and introducing clear water into the regenerated polyester-containing dyeing solution for cleaning and diluting, and discharging the diluted dyeing solution.
Preferably, said diluted liquor is discharged using a plate heat exchanger.
The regenerated terylene is generated by adopting regenerated raw materials, and the alkali resistance of the regenerated terylene is poor. In the invention, the plate heat exchanger is adopted to discharge high-temperature dyeing residual liquid in the dyeing and cooling process, the flow of clear water is controlled to be mixed with the dye liquor in the dye vat, and the discharged dyeing residual liquid can reduce the temperature and discharge. The temperature of the dye vat can be reduced, and the phenomenon that the temperature is too low and is too fast to reduce due to the fact that the temperature of injected water is too low can be avoided. The clear water is injected in the cooling process, so that the concentrations of the dye and the auxiliary agent of the dye liquor in the dye vat can be continuously reduced, the residual loose color on the surface of the fabric is cleaned, and the color fastness of the fabric is improved. In addition, no auxiliary agent is added in the cooling cleaning process, and the non-auxiliary agent cooling cleaning process not only can shorten or reduce the post-dyeing treatment process, but also completely avoids the use of caustic soda and sodium hydrosulfite.
Preferably, the cooling cleaning in the step (4) adopts a sectional cooling cleaning.
Preferably, the specific cooling process of the cooling and cleaning in the step (4) is as follows: introducing clean water at a temperature of 120 to 130 ℃ (e.g., 120 ℃, 121 ℃, 122 ℃, 123 ℃, 124 ℃, 125 ℃, 126 ℃, 127 ℃, 128 ℃, 129 ℃, 130 ℃), cooling to 100 to 120 ℃ (e.g., 100 ℃, 102 ℃, 104 ℃, 106 ℃, 108 ℃, 110 ℃, 112 ℃, 114 ℃, 116 ℃, 118 ℃, 120 ℃) at a rate of 2.0 to 3.0 ℃/min (e.g., 2.0 ℃/min, 2.1 ℃/min, 2.2 ℃/min, 2.3 ℃/min, 2.4 ℃/min, 2.5 ℃/min, 2.6 ℃/min, 2.7 ℃/min, 2.8 ℃/min, 2.9 ℃/min, 3.0 ℃/min), and further cooling to 1.0 to 2.0 ℃/min (e.g., 1.0 ℃/min, 1.1 ℃/min, 1.2 ℃/min, 1.3 ℃/min, 1.4 ℃/min, 1.5 ℃/min, 1.6 ℃/min, Cooling to 90-100 deg.C (such as 90 deg.C, 91 deg.C, 92 deg.C, 93 deg.C, 94 deg.C, 95 deg.C, 96 deg.C, 97 deg.C, 98 deg.C, 99 deg.C, 100 deg.C) at a rate of 1.7 deg.C/min, 1.8 deg.C/min, 1.9 deg.C/min, 2.0 deg.C/min), and cooling to 65-75 deg.C (such as 65 deg.C, 66 deg.C, 67 deg.C, 68 deg.C, 69 deg.C, 70 deg.C, 71 deg.C. The temperature reduction process also has strict requirements, and if the temperature reduction speed is too high, the polyester fabric shrinks too fast, so that creases are easily generated; if the temperature is too slow, the energy consumption is large.
Preferably, the specific cooling process of the cooling and cleaning in the step (4) is as follows: introducing clean water at 125 deg.C, cooling to 110 deg.C at 2.5 deg.C/min, cooling to 95 deg.C at 1.5 deg.C/min, and cooling to 70 deg.C at 2.0 deg.C/min.
Preferably, the shaping in step (5) is carried out by using a heat setting machine.
Preferably, the temperature for the shaping in the step (5) is 100 to 130 ℃, for example, 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃.
Preferably, the dyeing process specifically comprises the following steps:
(1) high-temperature presetting: performing high-temperature pre-setting on the regenerated polyester fabric for 30-40 s at 180-190 ℃;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) for 10-20 min at 65-75 ℃ by using 1-3 g/L of an oil removal agent;
(3) dyeing: placing the regenerated polyester fabric subjected to pretreatment and oil removal in the step (2) in a dye solution, and carrying out sectional type heating dyeing at 80-130 ℃;
the dye solution comprises the following components in percentage by mass:
(4) cleaning: introducing clear water into the dye solution obtained in the step (3) to carry out sectional cooling cleaning on the dyed regenerated polyester fabric at the temperature of 130-70 ℃, and discharging the diluted dye solution by adopting a plate heat exchanger;
(5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4) by using a heat setting machine at the temperature of 100-130 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the dyeing process of the invention can improve the dye-uptake of the dye, solve the quality problems of poor color spot, color point, transverse rise and fastness of the current regenerated terylene after dyeing and finishing, ensure that each color fastness of the superfine terylene fabric reaches more than 4 grades, improve the dyeing performance, obtain ideal dyeing effect and simultaneously have the advantages of environmental protection and low energy consumption.
Drawings
FIG. 1 is a process flow diagram of the dyeing process of the regenerated terylene.
Fig. 2 is a fiber diagram of regenerated polyester.
FIG. 3 is a fiber diagram of a primary polyester.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention. (wherein, FIG. 1 is a process flow chart of the dyeing process of the regenerated terylene in the invention)
The regenerated Polyester stretch fabrics 500KG (82% Polyester + 18% Lycra) in the examples and comparative examples provided below were 75D/72F PETy +40D Lycra, 155CM in width, 170g/m in grammage2(ii) a Degreasing agent LYS (high chemical engineering), softening agent CN (Jointex) in bath, and homogenizingDye P (clarien corporation), swelling agent D (sumimai chemical), glacial acetic acid (guangdong shangshan chemical), sodium acetate (guangzhou cambodia chemical), dye: series of disperse dyes of the SE type (commercially available).
The following examples and comparative examples are provided below and the equipment and equipment used for staining and detection: AK-DSL dye vat (Taiwan Asia rock Co., Ltd., China), Datacolor 650 spectrophotometer (Datacolor Co., Ltd.), pH meter (Shanghai Nobo environmental protection science and technology Co., Ltd.).
Example 1
The embodiment provides a dyeing process of light apricot color (light color system) regenerated terylene, which is characterized by comprising the following steps:
(1) high-temperature presetting: performing high-temperature pre-setting on the regenerated polyester fabric for 35s at 185 ℃;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) for 15min at 70 ℃ by using 2g/L of oil removal agent LYS;
(3) dyeing: placing the regenerated polyester fabric subjected to oil removal pretreatment in the step (2) into a dye vat, adding water for soaking according to a bath ratio of 1:10, adding a softening agent CN, an expanding agent D, an 3/4 leveling agent P and a buffer solution (glacial acetic acid and sodium acetate) according to the following formula, heating to 50 ℃ at a speed of 3 ℃/min, adding the rest 1/4 leveling agent P and a dye into the dye vat, uniformly mixing, and carrying out sectional heating dyeing, wherein the specific heating process of dyeing is as follows: adding dye liquor at 50 deg.C, heating to 80 deg.C at a rate of 2.0 deg.C/min, heating to 100 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1 deg.C/min, and holding at 125 deg.C for 15 min;
the dye solution comprises the following components in percentage by mass:
the pH value of the dye solution is 4.0;
(4) cleaning: and (4) introducing clear water into the dye liquor obtained in the step (3) to carry out sectional type cooling cleaning on the dyed regenerated polyester fabric, wherein the specific cooling process of the cooling cleaning is as follows: introducing clean water at 125 deg.C, cooling to 115 deg.C at 2.5 deg.C/min, cooling to 95 deg.C at 1.5 deg.C/min, and cooling to 70 deg.C at 2.0 deg.C/min, and discharging diluted dye solution with plate heat exchanger;
(5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4) by using a heat setting machine at 120 ℃.
Example 2
The difference from the example 1 is only that the mass concentration of the leveling agent in the dye solution is 0.5g/L, and the rest is the same as the example 1.
Example 3
The difference from the example 1 is that the mass concentration of the leveling agent in the dye solution is 1.0g/L, and the rest is the same as the example 1.
Example 4
The difference from the example 1 is that the mass concentration of the leveling agent in the dye solution is 1.5g/L, and the rest is the same as the example 1.
Example 5
The difference from the example 1 is only that the mass concentration of the leveling agent in the dye solution is 2.5g/L, and the rest is the same as the example 1.
Example 6
The difference from the example 1 is only that the mass concentration of glacial acetic acid in the dye liquor is 0.6g/L, the mass concentration of sodium acetate is 0.6g/L, and the rest is the same as the example 1.
Example 7
The difference from the example 1 is only that the mass concentration of glacial acetic acid in the dye liquor is 0.9g/L, the mass concentration of sodium acetate is 0.3g/L, and the rest is the same as the example 1.
Example 8
The difference from the example 1 is that the dyeing in the step (3) does not adopt a sectional heating dyeing method, and the specific heating process is as follows: raising the temperature to 125 ℃ at the rate of 1.0 ℃/min under the temperature condition of 50 ℃, finally preserving the heat at 125 ℃ for 20min, and finally preserving the heat at 125 ℃ for 15min, wherein the rest is the same as the example 1.
Example 9
The difference from the embodiment 1 is that the cooling cleaning in the step (4) does not adopt a sectional cooling cleaning method, and the specific cooling process is as follows: clean water is introduced at a temperature of 125 ℃ and the temperature is reduced to 70 ℃ at a rate of 1.0 ℃/min, and the rest is the same as that of the embodiment 1.
Example 10
The difference from example 1 is that the temperature for high-temperature pre-setting in step (1) is 170 ℃ and the other steps are the same as example 1.
Example 11
The difference from example 1 is that the temperature for high-temperature pre-setting in step (1) is 190 ℃ and the other steps are the same as example 1.
Example 12
The embodiment provides a dyeing process of a sapphire blue (medium color system) regenerated polyester, which is characterized by comprising the following steps:
(1) high-temperature presetting: performing high-temperature presetting on the regenerated polyester fabric at 185 ℃ for 30 s;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) for 15min at 70 ℃ by using 2g/L of oil removal agent LYS;
(3) dyeing: placing the regenerated polyester fabric subjected to oil removal pretreatment in the step (2) into a dye vat, adding water for soaking according to a bath ratio of 1:9, adding a softening agent CN, an expanding agent D, an 3/4 leveling agent P and a buffer solution (glacial acetic acid and sodium acetate) according to the following formula, heating to 50 ℃ at a speed of 3 ℃/min, adding the rest 1/4 leveling agent P and a dye into the dye vat, uniformly mixing, and carrying out sectional heating dyeing, wherein the specific heating process of dyeing is as follows: adding dye liquor at 50 deg.C, heating to 90 deg.C at a rate of 2.0 deg.C/min, heating to 105 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1.0 deg.C/min, and holding at 125 deg.C for 20 min;
the dye solution comprises the following components in percentage by mass:
the pH value of the dye solution is 4.2, and the bath ratio of the dyeing is 1: 9;
(4) cleaning: and (4) introducing clear water into the dye liquor obtained in the step (3) to carry out sectional type cooling cleaning on the dyed regenerated polyester fabric, wherein the specific cooling process of the cooling cleaning is as follows: introducing clean water at 125 deg.C, cooling to 115 deg.C at 2.5 deg.C/min, cooling to 95 deg.C at 1.5 deg.C/min, and cooling to 70 deg.C at 2.0 deg.C/min, and discharging diluted dye solution with plate heat exchanger;
(5) shaping: and (5) shaping the regenerated polyester fabric cleaned in the step (4) at 100 ℃ by using a heat setting machine.
Example 13
The difference from the example 12 is that the mass concentration of the leveling agent in the dye solution is 0.5g/L, and the rest is the same as the example 1.
Example 14
The difference from the example 12 is that the mass concentration of the leveling agent in the dye solution is 1.0g/L, and the rest is the same as the example 1.
Example 15
The difference from the example 12 is that the mass concentration of the leveling agent in the dye solution is 2.0g/L, and the rest is the same as the example 1.
Example 16
The difference from the example 12 is that the mass concentration of the leveling agent in the dye solution is 2.5g/L, and the rest is the same as the example 1.
Example 17
The embodiment provides a dyeing process of black (dark color system) regenerated terylene, which is characterized by comprising the following steps:
(1) high-temperature presetting: performing high-temperature presetting on the regenerated polyester fabric for 40s at 185 ℃;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) for 15min at 70 ℃ by using 2g/L of oil removal agent LYS;
(3) dyeing: placing the regenerated polyester fabric subjected to oil removal pretreatment in the step (2) into a dye vat, adding water for soaking according to a bath ratio of 1:9, adding a softening agent CN, an expanding agent D, an 3/4 leveling agent P and a buffer solution (glacial acetic acid and sodium acetate) according to the following formula, heating to 50 ℃ at a speed of 3 ℃/min, adding the rest 1/4 leveling agent P and a dye into the dye vat, uniformly mixing, and carrying out sectional heating dyeing, wherein the specific heating process of dyeing is as follows: adding dye liquor at 50 deg.C, heating to 100 deg.C at a rate of 2.0 deg.C/min, heating to 115 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1.0 deg.C/min, and holding at 125 deg.C for 25 min;
the dye solution comprises the following components in percentage by mass:
the pH value of the dye solution is 4.5;
(4) cleaning: and (4) introducing clear water into the dye liquor obtained in the step (3) to carry out sectional type cooling cleaning on the dyed regenerated polyester fabric, wherein the specific cooling process of the cooling cleaning is as follows: introducing clean water at 125 deg.C, cooling to 115 deg.C at 2.5 deg.C/min, cooling to 95 deg.C at 1.5 deg.C/min, and cooling to 70 deg.C at 2.0 deg.C/min, and discharging diluted dye solution with plate heat exchanger;
(5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4) by using a heat setting machine at 130 ℃.
Example 18
The difference from the example 17 is that the mass concentration of the leveling agent in the dye solution is 0.5g/L, and the rest is the same as the example 1.
Example 19
The difference from the example 17 is that the mass concentration of the leveling agent in the dye solution is 1.5g/L, and the rest is the same as the example 1.
Example 20
The difference from the example 17 is that the mass concentration of the leveling agent in the dye solution is 2.0g/L, and the rest is the same as the example 1.
Example 21
The difference from the example 17 is that the mass concentration of the leveling agent in the dye solution is 2.5g/L, and the rest is the same as the example 1.
Comparative example 1
The difference from the example 1 is that the regenerated polyester fabric is directly subjected to the pretreatment of the step (2) for degreasing, and is not subjected to high-temperature presetting, and the rest is the same as the example 1.
Comparative example 2
The difference from the example 1 is that the cleaning in the step (4) does not adopt a mode of adding clean water for cooling and cleaning, but 1.0g/L of the auxiliary agent malic acid cleaning agent is added into the dye vat dyed in the step (3), and the rest is the same as the example 1.
Test example 1
Respectively carrying out dye uptake tests on the regenerated terylene treated by the dyeing process of the examples 1-21 and the regenerated terylene treated by the comparative examples 1-2, and observing the effect of each cloth cover, wherein the test method of the dye uptake comprises the following steps: the absorbance of the dye solution before and after dyeing was measured with a spectrophotometer, and the% dye uptake (%) (1-nA) was calculated according to the following equation1/mA0) X 100%, wherein: m/n represents the dilution factor of the dye solution before/after dyeing, A0/A1Represents the absorbance of the dye solution before/after dyeing after being diluted by m/n times, and the specific results are shown in the table 1:
TABLE 1
The above test data shows that the dyeing process of the invention can improve the dye uptake of the dye when dyeing the regenerated terylene, and solves the quality problems of colored patterns, colored dots, transverse rise and poor fastness of the regenerated terylene after dyeing and finishing. In addition, when the regenerated terylene is dyed, the higher the dosage of the leveling agent is, the more beneficial the control of the dyeing initial dye-uptake and the guarantee of dyeing uniformity are, and the too high dye-uptake of the leveling agent is reduced. In contrast, comparative example 1, which did not undergo the high temperature pre-setting treatment, was prone to excessive relaxation and edge curl and staining.
Test example 2
The regenerated terylene treated by the dyeing process of the embodiment 1 to 21 and the regenerated terylene treated by the comparative example 1 to 2 are respectively subjected to mass production color difference test by using a Datacolor computer color tester, 1. the color difference △ E (CMC 2:1) data is measured by using the Datacolor computer color tester at a D65 light source to obtain the color difference of a dyed sample, 2.△ E values take the standard color of a customer, 3. the customer standard △ E is less than or equal to 0.6 for receiving goods, and the specific test results are shown in Table 2:
TABLE 2
From the test results, the dyeing process of the invention is adopted to dye the regenerated terylene, which solves the quality problems of poor color spot, color point, transverse rise and fastness existing after the dyeing and finishing of the regenerated terylene at present, ensures that the color reaches the standard of △ E being less than or equal to 0.6, improves the dyeing performance, and obtains ideal dyeing effect, but does not use sectional temperature rise dyeing when dyeing is not used or sectional temperature drop dyeing when cleaning and cooling are not used, and the color effect is different from the standard of △ E being less than or equal to 0.6, while the comparative example 1 does not carry out high-temperature pre-setting treatment, or the color effect of the regenerated terylene which is cleaned by adding an auxiliary agent in the comparative example 2 is greatly different from the standard of △ E being less than or equal to 0.6.
Test example 3
The color fastness tests were carried out on the regenerated polyester fibers treated by the dyeing processes of examples 1 to 21 and the regenerated polyester fibers treated by comparative examples 1 to 2, respectively, wherein the fastness to soaping was measured with reference to AATCC Test Method 61-2004; the perspiration color fastness is determined by referring to AATCC Test Method 15-2009; the water stain fastness is determined by referring to AATCC Test Method 107-2009; light fastness was determined with reference to AATCC Test Method 16E (10h) -2008. The specific test results are shown in table 3:
TABLE 3
| Test items | Soaping fastness (grade) | Fastness to perspiration (grade) | Fastness to water (grade) | Light fastness (grade) |
| Example 1 | 4～5 | 4～5 | 4～5 | 4 |
| Example 2 | 4～5 | 4～5 | 4～5 | 4 |
| Example 3 | 4～5 | 4～5 | 4～5 | 4 |
| Example 4 | 4～5 | 4～5 | 4～5 | 4 |
| Example 5 | 4～5 | 4～5 | 4～5 | 4 |
| Example 6 | 4 | 4 | 4 | 4 |
| Example 7 | 4 | 4 | 4 | 4 |
| Example 8 | 4 | 4 | 4 | 4 |
| Example 9 | 4～5 | 4～5 | 4～5 | 4 |
| Example 10 | 3 | 3 | 3 | 3 |
| Example 11 | 3 | 3 | 3 | 3 |
| Example 12 | 4～5 | 4 | 4 | 4 |
| Example 13 | 4～5 | 4 | 4 | 4 |
| Example 14 | 4～5 | 4 | 4 | 4 |
| Example 15 | 4～5 | 4 | 4 | 4 |
| Example 16 | 4～5 | 4 | 4 | 4 |
| Example 17 | 4 | 4 | 4 | 4 |
| Example 18 | 4 | 4 | 4 | 4 |
| Example 19 | 4 | 4 | 4 | 4 |
| Example 20 | 4 | 4 | 4 | 4 |
| Example 21 | 4 | 4 | 4 | 4 |
| Comparative example 1 | 4 | 4 | 4 | 4 |
| Comparative example 2 | 4 | 4 | 4 | 4 |
The test results show that the dyeing process of the invention is adopted to dye the regenerated terylene, which solves the quality problems of color spots, color points, transverse rise and poor fastness existing after the prior regenerated terylene is dyed and finished, ensures that each color fastness of the superfine terylene fabric reaches more than 4 grades, improves the dyeing performance and obtains ideal dyeing effect.
Test example 4
Color difference analysis of large-scale finished product of regenerated polyester elastic fabric
The dyeing process of the embodiment 1 is adopted to dye the regenerated polyester fabric for 15 batches, and the dyed regenerated polyester fabric of each batch is subjected to 555 color separation for the light apricot color difference by using a Datacolor color measuring and matching system, wherein the 1 st 5 of the 555SortCode represents the shade; 2 nd 5 represents the shade; the 3 rd 5 represents colored light. 555 is the average value of 1-18 shades, shades and colors. The coffee color 555Sort Code is 221 (the difference between the maximum value and the minimum value of the shade, the shade and the color), and the sum of the differences is 5(2+2+ 1). The sum is less than 5, 5-7 reaches the standard, and more than 7 does not pass (the factory standard), and the specific test results are shown in table 4:
TABLE 4
| Cloth numbering | △L | △C | △H | △E CMC | 555 color separation |
| 1 | 0.15 | -0.14 | -0.09 | 0.22 | 645 |
| 2 | 0.22 | 0.05 | -0.02 | 0.23 | 655 |
| 3 | 0.16 | -0.19 | -0.04 | 0.26 | 645 |
| 4 | 0.08 | -0.07 | 0.01 | 0.11 | 555 |
| 5 | -0.13 | 0.05 | -0.12 | 0.18 | 454 |
| 6 | 0.21 | -0.23 | 0.05 | 0.32 | 645 |
| 7 | 0.21 | -0.1 | -0.01 | 0.23 | 645 |
| 8 | -0.08 | 0.07 | -0.01 | 0.11 | 555 |
| 9 | 0.16 | -0.14 | -0.02 | 0.21 | 645 |
| 10 | -0.07 | 0.25 | -0.03 | 0.26 | 565 |
| 11 | 0.03 | -0.12 | -0.21 | 0.25 | 544 |
| 12 | 0.22 | -0.09 | -0.14 | 0.28 | 644 |
| 13 | 0.21 | -0.23 | -0.15 | 0.34 | 644 |
| 14 | 0.14 | -0.26 | -0.06 | 0.3 | 645 |
| 15 | 0.24 | -0.05 | 0.03 | 0.25 | 655 |
From the test results in the table, it can be known that, when the dyeing process of the embodiment 1 is used for dyeing the regenerated polyester fabric for 15 batches, the color difference of the large-scale finished product is less than 7, and the dyeing effect is ideal.
The applicant states that the present invention is illustrated by the above examples to the dyeing process of the regenerated polyester fiber, but the present invention is not limited to the above examples, that is, the present invention is not meant to be implemented by relying on the above examples. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. The dyeing process of the regenerated terylene is characterized by comprising the following steps:
(1) high-temperature presetting: performing high-temperature presetting on the regenerated polyester fabric;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) by using an oil removal agent;
(3) dyeing: placing the regenerated polyester fabric subjected to pretreatment and oil removal in the step (2) into a dye solution for dyeing;
(4) cleaning: introducing water into the dyed dye solution obtained in the step (3), and cooling and cleaning the dyed regenerated polyester fabric;
(5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4).
2. The dyeing process of the regenerated terylene according to claim 1, characterized in that the high temperature presetting temperature in the step (1) is 180-190 ℃, preferably 185 ℃;
preferably, the high-temperature presetting time in the step (1) is 30-40 s.
3. The dyeing process of the regenerated terylene according to claim 1 or 2, characterized in that the oil removing agent in step (2) is an oil removing agent LYS;
preferably, the dosage of the oil removing agent LYS is 1-3 g/L, preferably 2 g/L;
preferably, the temperature of the oil removal in the step (2) is 65-75 ℃, and preferably 70 ℃;
preferably, the time for removing the oil in the step (2) is 10-20 min, and preferably 15 min.
4. The dyeing process of the regenerated terylene according to any one of claims 1 to 3, characterized in that the dye solution in the step (3) comprises the following components by mass concentration:
preferably, the dye includes any one of light color series dye, medium color series dye or dark color series dye;
preferably, the buffer solution is a mixed solution of acetic acid and sodium acetate;
preferably, the mass ratio of the acetic acid to the sodium acetate is (1-3) to 1, preferably 2: 1;
preferably, the leveling agent is a leveling agent P;
preferably, the dye is a light-color dye, and the mass concentration of the leveling agent in the dye solution is 1.5-2.5 g/L, preferably 2.0 g/L;
preferably, the dye is a medium-color dye, and the mass concentration of the leveling agent in the dye solution is 1.5-2.5 g/L, preferably 1.5 g/L;
preferably, the dye is a dark color dye, and the mass concentration of the leveling agent in the dye solution is 1.0-2.5 g/L, preferably 1.0 g/L;
preferably, the swelling agent is a swelling agent OD;
preferably, the in-bath softener is in-bath softener CN.
5. The dyeing process of the regenerated terylene according to any one of claims 1 to 4, characterized in that the pH value of the dyeing solution in the step (3) is 4.0 to 4.5;
preferably, the bath ratio of the dyeing in the step (3) is 1 (5-15), and preferably 1: 10.
6. The dyeing process of the regenerated terylene according to any one of claims 1 to 5, characterized in that the dyeing temperature in the step (3) is 80 to 130 ℃;
preferably, the specific temperature rise process of the dyeing in the step (3) is as follows: the specific temperature rise process of the dyeing is as follows: heating to 120-130 ℃ at the speed of 0.5-2.0 ℃/min under the temperature condition of 50 ℃, and finally, preserving the heat for 10-30 min at the temperature of 120-130 ℃.
7. The dyeing process of the regenerated terylene according to any one of claims 1 to 5, characterized in that the dyeing in the step (3) adopts a sectional heating dyeing method;
preferably, the specific temperature rise process of the dyeing in the step (3) is as follows: the specific temperature rise process of the dyeing is as follows: adding a dye solution at the temperature of 50 ℃, heating to 80-100 ℃ at the speed of 1.0-2.0 ℃/min, heating to 100-115 ℃ at the speed of 0.5-1.0 ℃/min, heating to 120-130 ℃ at the speed of 0.8-1.5 ℃/min, and finally keeping the temperature at 120-130 ℃ for 10-30 min;
preferably, the dye in the dye solution in the step (3) is a light color dye, and the specific temperature rise process of the dyeing is as follows: adding dye liquor at 50 deg.C, heating to 80 deg.C at a rate of 2.0 deg.C/min, heating to 100 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1.0 deg.C/min, and holding at 125 deg.C for 15 min;
preferably, the dye in the dye solution in the step (3) is a medium-color dye, and the specific temperature rise process of the dyeing is as follows: adding dye liquor at 50 deg.C, heating to 90 deg.C at a rate of 2.0 deg.C/min, heating to 105 deg.C at a rate of 0.5 deg.C/min, heating to 125 deg.C at a rate of 1.0 deg.C/min, and holding at 125 deg.C for 20 min;
preferably, the dye in the dye solution in the step (3) is a dark dye, and the specific temperature rise process of the dyeing is as follows: adding dye liquor at 50 deg.C, heating to 100 deg.C at 2.0 deg.C/min, heating to 115 deg.C at 0.5 deg.C/min, heating to 125 deg.C at 1.0 deg.C/min, and holding at 125 deg.C for 25 min.
8. The dyeing process of the regenerated terylene according to any one of claims 1 to 7, characterized in that the specific process of cooling and cleaning in the step (4) is as follows: introducing clear water into the regenerated polyester-containing dyeing solution for cleaning and diluting, and discharging the diluted dyeing solution;
preferably, the diluted dye liquor is discharged by a plate heat exchanger;
preferably, the cooling cleaning in the step (4) adopts a sectional cooling cleaning method;
preferably, the specific cooling process of the cooling and cleaning in the step (4) is as follows: introducing clean water at the temperature of 120-130 ℃, cooling to 100-120 ℃ at the speed of 2.0-3.0 ℃/min, cooling to 90-100 ℃ at the speed of 1.0-2.0 ℃/min, and finally cooling to 65-75 ℃ at the speed of 1.5-2.5 ℃/min;
preferably, the specific cooling process of the cooling and cleaning in the step (4) is as follows: introducing clean water at 125 deg.C, cooling to 110 deg.C at 2.5 deg.C/min, cooling to 95 deg.C at 1.5 deg.C/min, and cooling to 70 deg.C at 2.0 deg.C/min.
9. The dyeing process of the regenerated terylene according to any one of claims 1 to 8, characterized in that the shaping in the step (5) is carried out by a heat setting machine;
preferably, the temperature for shaping in the step (5) is 100-130 ℃.
10. The dyeing process of the regenerated terylene according to any one of claims 1 to 9, characterized in that the dyeing process comprises the following steps:
(1) high-temperature presetting: performing high-temperature pre-setting on the regenerated polyester fabric for 30-40 s at 180-190 ℃;
(2) oil removal by pretreatment: carrying out oil removal treatment on the regenerated polyester fabric pre-shaped in the step (1) for 10-20 min at 65-75 ℃ by using 1-3 g/L of an oil removal agent;
(3) dyeing: placing the regenerated polyester fabric subjected to pretreatment and oil removal in the step (2) in a dye solution, and carrying out sectional type heating dyeing at 80-130 ℃;
the dye solution comprises the following components in percentage by mass:
(4) cleaning: introducing clear water into the dye solution obtained in the step (3) to carry out sectional cooling cleaning on the dyed regenerated polyester fabric at the temperature of 130-70 ℃, and discharging the diluted dye solution by adopting a plate heat exchanger;
(5) shaping: and (4) shaping the regenerated polyester fabric cleaned in the step (4) by using a heat setting machine at the temperature of 100-130 ℃.
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| CN113502666A (en) * | 2021-06-18 | 2021-10-15 | 吴江瑞嘉纺织有限公司 | High-color-fastness dyeing and finishing process for regenerated polyester fabric |
| CN114486722A (en) * | 2022-01-05 | 2022-05-13 | 杭州帛阳新材料科技有限公司 | Method, device and equipment for improving color fastness qualification rate and storage medium |
| CN114486722B (en) * | 2022-01-05 | 2024-04-16 | 杭州帛阳新材料科技有限公司 | Color fastness qualification rate improving method, device, equipment and storage medium |
| CN114645447A (en) * | 2022-04-22 | 2022-06-21 | 互太(番禺)纺织印染有限公司 | Fabric containing Sorona fibers and dyeing and finishing process and application thereof |
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