CN112981982A - Polyester yarn dyeing method based on disperse dye - Google Patents
Polyester yarn dyeing method based on disperse dye Download PDFInfo
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- CN112981982A CN112981982A CN202110212167.4A CN202110212167A CN112981982A CN 112981982 A CN112981982 A CN 112981982A CN 202110212167 A CN202110212167 A CN 202110212167A CN 112981982 A CN112981982 A CN 112981982A
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- 229920000728 polyester Polymers 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000000986 disperse dye Substances 0.000 title claims abstract description 19
- 238000009970 yarn dyeing Methods 0.000 title claims abstract description 18
- 238000004043 dyeing Methods 0.000 claims abstract description 242
- 239000000975 dye Substances 0.000 claims abstract description 117
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 28
- 229920004933 Terylene® Polymers 0.000 claims description 26
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 26
- 238000004321 preservation Methods 0.000 claims description 15
- 238000005457 optimization Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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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
- D06P1/16—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 dispersed, e.g. acetate, dyestuffs
-
- 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
- D06P3/54—Polyesters using dispersed dyestuffs
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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Abstract
The invention discloses a polyester yarn dyeing method based on disperse dyes, which comprises the following steps of S1: according to different dyeing properties of different polyester yarn materials and different total dye concentration ranges, carrying out dyeing classification and forming dyeing classification information; step S2: different dyeing processes are used according to different dyeing classifications in the dyeing classification information; step S3: selecting dyes of the current dyeing process, and combining into a fixed color triangle according to the compatibility of the dyes to obtain dye color triangle data. The polyester yarn dyeing method based on the disperse dye disclosed by the invention has the advantages that the dyeing process of a dyeing enterprise is standardized, the dyeing efficiency can be improved, the dyeing problem is reduced, the dyeing reproducibility is improved, once the dyeing enterprise has a stable and reproducible dyeing data source, the further optimization of the dyeing formula is facilitated, the once-dyeing success rate is improved, the pollution discharge is reduced, the dyeing cost is reduced and the like.
Description
Technical Field
The invention belongs to the technical field of polyester yarn dyeing, and particularly relates to a polyester yarn dyeing method based on disperse dyes.
Background
At present, because various disperse dyes provided by various dye manufacturers in China are various, and various dye factories have different technical levels due to different product requirements, dyeing processes are divided into five-flower eight, and no standard specification exists for dyeing polyester yarns by using common disperse dyes. The non-standard dyeing easily causes defects such as reduction of dyeing efficiency, more dyeing color defects and the like, consequently, dyeing is not reproduced, the success rate of dyeing at one time is low, the sewage treatment pressure is increased, the enterprise cost is finally wasted, and the national environment is polluted.
Disclosure of Invention
The invention mainly aims to provide a polyester yarn dyeing method based on disperse dyes, which standardizes the dyeing process of a dyeing enterprise, can improve the dyeing efficiency, reduce the dyeing problem and improve the dyeing reproducibility, and once the dyeing enterprise has a stable and reproducible dyeing data source, the dyeing enterprise is favorable for further optimizing the dyeing formula, so that the once-through success rate of dyeing is improved, the pollution discharge is reduced, the dyeing cost is reduced, the economic benefit of the enterprise can be improved finally, and the pollution to the environment can be reduced.
In order to achieve the above purpose, the invention provides a polyester yarn dyeing method based on disperse dyes, which comprises the following steps:
step S1: according to different dyeing properties of different polyester yarn materials and different total dye concentration ranges, carrying out dyeing classification and forming dyeing classification information;
step S2: different dyeing (heat preservation) processes are used according to different dyeing classifications in the dyeing classification information;
step S3: selecting dyes of the current dyeing process, and combining into a fixed color triangle according to the compatibility of the dyes to obtain dye color triangle data.
As a further preferable embodiment of the above technical means, step S1 is specifically implemented as the following steps:
step S1.1: dyeing and classifying the polyester filaments under different total dye concentrations;
step S1.2: dyeing and classifying the polyester high elasticity under different total dye concentrations;
step S1.3: dyeing and classifying the polyester core-spun yarn under different total dye concentrations;
step S1.4: dyeing and classifying the polyester staple fibers under different total dye concentrations;
step S1.5: and (4) dyeing and classifying the terylene low elasticity under different total dye concentrations.
As a further preferred embodiment of the above technical solution, step S1.1 is specifically implemented as the following steps:
step S1.1.1: the dyeing of polyester filaments at a total dye concentration of 0-0.2% is classified as first filament dyeing (CFPDNWG);
step S1.1.2: the dyeing of polyester filaments at a total dye concentration of 0.2% -0.5% is classified as secondary filament dyeing (CFPDNPG);
step S1.1.3: the dyeing of polyester filament yarn at a total dye concentration of 0.5% -1.0% is classified as third filament dyeing (CFPDNMG);
step S1.1.4: the dyeing of the polyester filament yarn at a total dye concentration of 1.0% -2.0% is classified as fourth filament dyeing (CFPDNDG);
step S1.1.5: dyeing of polyester filaments at a total dye concentration of greater than 2.0% is classified as fifth filament dyeing (CFPDNVG).
As a further preferred embodiment of the above technical solution, step S1.2 is specifically implemented as the following steps:
step S1.2.1: the dyeing of polyester high-elasticity at the total dye concentration of 0-0.2 percent is classified as first high-elasticity dyeing (HTPDNWG);
step S1.2.2: the dyeing of the polyester high-elasticity dye at the total dye concentration of 0.2-0.5 percent is classified as second high-elasticity dyeing (HTPDNPG);
step S1.2.3: the dyeing of polyester high elasticity at the total dye concentration of 0.5-1.0% is classified as third high elasticity dyeing (HTPDNMG);
step S1.2.4: the dyeing of the polyester high-elasticity at the total dye concentration of 1.0-2.0% is classified as fourth high-elasticity dyeing (HTPDNDG);
step S1.2.5: dyeing of polyester high stretch at a total dye concentration of greater than 2.0% is classified as a fifth high stretch dyeing (HTPDNVG).
As a further preferred embodiment of the above technical solution, step S1.3 is specifically implemented as the following steps:
step S1.3.1: the dyeing of the polyester core-spun yarn at a total dye concentration of 0-0.2% is classified as a first core-spun dyeing (PPCDNWG);
step S1.3.2: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 0.2-0.5% is classified as second core-spun dyeing (PPCDNPG);
step S1.3.3: the dyeing of the polyester core-spun yarn at the total dye concentration of 0.5-1.0% is classified as third core-spun dyeing (PPCDNMG);
step S1.3.4: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 1.0-2.0% is classified as fourth core-spun dyeing (PPCDNDG);
step S1.3.5: dyeing of core polyester at a total dye concentration of greater than 2.0% is classified as a fifth core dyeing (PPCDNVG).
As a further preferred embodiment of the above technical solution, step S1.4 is specifically implemented as the following steps:
step S1.4.1: the dyeing of the polyester staple fibers at a total dye concentration of 0-0.2% is classified as first staple dyeing (SSPDNWG);
step S1.4.2: the dyeing of the polyester staple fibers at the total dye concentration of 0.2 to 0.5 percent is classified as second staple dyeing (SSPDNPG);
step S1.4.3: the dyeing of the polyester staple fiber under the total dye concentration of 0.5 to 1.0 percent is classified as third staple fiber dyeing (SSPDNMG);
step S1.4.4: the dyeing of the polyester staple fiber under the total dye concentration of 1.0-2.0% is classified as fourth staple fiber dyeing (SSPDNDG);
step S1.4.5: dyeing of polyester staple fibers at a total dye concentration of greater than 2.0% is classified as fifth staple dyeing (SSPDNVG).
As a further preferred embodiment of the above technical solution, step S1.5 is specifically implemented as the following steps:
step S1.5.1: the dyeing of the terylene low elasticity at the dye total concentration of 0-0.2% is classified as the first low elasticity dyeing (TXPDNWG);
step S1.5.2: the dyeing of the terylene low elasticity at the dye total concentration of 0.2 to 0.5 percent is classified as the second low elasticity dyeing (TXPDNPG);
step S1.5.3: the dyeing of the terylene low stretch at the dye total concentration of 0.5 to 1.0 percent is classified as third low stretch dyeing (TXPDMNG);
step S1.5.4: the dyeing of the terylene low elasticity at the dye total concentration of 1.0-2.0% is classified as fourth low elasticity dyeing (TXPNDG);
step S1.5.5: dyeing of polyester low stretch at a total dye concentration of greater than 2.0% is classified as a fifth low stretch dyeing (TXPDNVG).
As a further preferable embodiment of the above technical means, step S2 is specifically implemented as the following steps:
step S2.1: using a corresponding dyeing heat preservation process for the dyed and classified polyester filaments;
step S2.2: using a corresponding dyeing heat preservation process for the dyed classified terylene high elasticity;
step S2.3: using a corresponding dyeing heat preservation process for the dyed and classified polyester core-spun yarns;
step S2.4: using a corresponding dyeing heat preservation process for the dyed classified polyester staple fibers;
step S2.5: and (3) using a corresponding dyeing heat-preserving technology for the dyed and classified terylene low elasticity.
Drawings
FIG. 1 is a color triangle schematic diagram of a polyester yarn dyeing method based on disperse dyes according to the invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
In the preferred embodiment of the present invention, those skilled in the art should note that the polyester filament, polyester high stretch, polyester core, polyester short fiber, polyester low stretch, etc. related to the present invention can be regarded as the prior art.
Preferred embodiments.
The invention discloses a polyester yarn dyeing method based on disperse dyes, which comprises the following steps:
step S1: according to different dyeing properties of different polyester yarn materials and different total dye concentration ranges, carrying out dyeing classification and forming dyeing classification information;
step S2: carrying out different dyeing (heat preservation) processes according to different dyeing classifications in the dyeing classification information;
step S3: selecting dyes of the current dyeing process, and combining into a fixed color triangle according to the compatibility of the dyes to obtain dye color triangle data.
Specifically, step S1 is implemented as the following steps:
step S1.1: dyeing and classifying the polyester filaments under different total dye concentrations;
step S1.2: dyeing and classifying the polyester high elasticity under different total dye concentrations;
step S1.3: dyeing and classifying the polyester core-spun yarn under different total dye concentrations;
step S1.4: dyeing and classifying the polyester staple fibers under different total dye concentrations;
step S1.5: and (4) dyeing and classifying the terylene low elasticity under different total dye concentrations.
Preferably, first, different dyeing processes are used according to different dyeing properties of each material and different total dye concentration ranges to classify the materials into the following dyeing classes (see the following attached table 1):
attached table 1
More specifically, step S1.1 is embodied as the following steps:
step S1.1.1: the dyeing of polyester filaments at a total dye concentration of 0-0.2% is classified as first filament dyeing (CFPDNWG);
step S1.1.2: the dyeing of polyester filaments at a total dye concentration of 0.2% -0.5% is classified as secondary filament dyeing (CFPDNPG);
step S1.1.3: the dyeing of polyester filament yarn at a total dye concentration of 0.5% -1.0% is classified as third filament dyeing (CFPDNMG);
step S1.1.4: the dyeing of the polyester filament yarn at a total dye concentration of 1.0% -2.0% is classified as fourth filament dyeing (CFPDNDG);
step S1.1.5: dyeing of polyester filaments at a total dye concentration of greater than 2.0% is classified as fifth filament dyeing (CFPDNVG).
Further, step S1.2 is embodied as the following steps:
step S1.2.1: the dyeing of polyester high-elasticity at the total dye concentration of 0-0.2 percent is classified as first high-elasticity dyeing (HTPDNWG);
step S1.2.2: the dyeing of the polyester high-elasticity dye at the total dye concentration of 0.2-0.5 percent is classified as second high-elasticity dyeing (HTPDNPG);
step S1.2.3: the dyeing of polyester high elasticity at the total dye concentration of 0.5-1.0% is classified as third high elasticity dyeing (HTPDNMG);
step S1.2.4: the dyeing of the polyester high-elasticity at the total dye concentration of 1.0-2.0% is classified as fourth high-elasticity dyeing (HTPDNDG);
step S1.2.5: dyeing of polyester high stretch at a total dye concentration of greater than 2.0% is classified as a fifth high stretch dyeing (HTPDNVG).
Further, step S1.3 is embodied as the following steps:
step S1.3.1: the dyeing of the polyester core-spun yarn at a total dye concentration of 0-0.2% is classified as a first core-spun dyeing (PPCDNWG);
step S1.3.2: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 0.2-0.5% is classified as second core-spun dyeing (PPCDNPG);
step S1.3.3: the dyeing of the polyester core-spun yarn at the total dye concentration of 0.5-1.0% is classified as third core-spun dyeing (PPCDNMG);
step S1.3.4: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 1.0-2.0% is classified as fourth core-spun dyeing (PPCDNDG);
step S1.3.5: dyeing of core polyester at a total dye concentration of greater than 2.0% is classified as a fifth core dyeing (PPCDNVG).
Preferably, step S1.4 is embodied as the following steps:
step S1.4.1: the dyeing of the polyester staple fibers at a total dye concentration of 0-0.2% is classified as first staple dyeing (SSPDNWG);
step S1.4.2: the dyeing of the polyester staple fibers at the total dye concentration of 0.2 to 0.5 percent is classified as second staple dyeing (SSPDNPG);
step S1.4.3: the dyeing of the polyester staple fiber under the total dye concentration of 0.5 to 1.0 percent is classified as third staple fiber dyeing (SSPDNMG);
step S1.4.4: the dyeing of the polyester staple fiber under the total dye concentration of 1.0-2.0% is classified as fourth staple fiber dyeing (SSPDNDG);
step S1.4.5: dyeing of polyester staple fibers at a total dye concentration of greater than 2.0% is classified as fifth staple dyeing (SSPDNVG).
Preferably, step S1.5 is embodied as the following steps:
step S1.5.1: the dyeing of the terylene low elasticity at the dye total concentration of 0-0.2% is classified as the first low elasticity dyeing (TXPDNWG);
step S1.5.2: the dyeing of the terylene low elasticity at the dye total concentration of 0.2 to 0.5 percent is classified as the second low elasticity dyeing (TXPDNPG);
step S1.5.3: the dyeing of the terylene low stretch at the dye total concentration of 0.5 to 1.0 percent is classified as third low stretch dyeing (TXPDMNG);
step S1.5.4: the dyeing of the terylene low elasticity at the dye total concentration of 1.0-2.0% is classified as fourth low elasticity dyeing (TXPNDG);
step S1.5.5: dyeing of polyester low stretch at a total dye concentration of greater than 2.0% is classified as a fifth low stretch dyeing (TXPDNVG).
Preferably, step S2 is embodied as the following steps:
step S2.1: using a corresponding dyeing heat preservation process for the dyed and classified polyester filaments;
step S2.2: using a corresponding dyeing heat preservation process for the dyed classified terylene high elasticity;
step S2.3: using a corresponding dyeing heat preservation process for the dyed and classified polyester core-spun yarns;
step S2.4: using a corresponding dyeing heat preservation process for the dyed classified polyester staple fibers;
step S2.5: and (3) using a corresponding dyeing heat-preserving technology for the dyed and classified terylene low elasticity.
Next, each staining classification corresponds to the following reference staining process (see attached table 2 below):
attached table 2
For example, for a dyeing classified as CFPDNWG (polyester filaments at a total dye concentration of 0-0.2%), the dyeing liter insulation process is: the method comprises the steps of increasing the temperature to 80 ℃ from the initial temperature at a speed of 5 ℃ per minute, then increasing the temperature to 110 ℃ from 80 ℃ at a speed of 2 ℃ per minute, then increasing the temperature to 132 ℃ from 110 ℃ at a speed of 3 ℃ per minute, and finally keeping the temperature for 25 minutes to finish dyeing and heat preservation, wherein some steps relate to reduction cleaning, and the purpose is to increase the color fastness of the terylene and enable the dye carried by the dyed terylene to reach the legal standard so as to prevent forbidden dye or overproof and the like.
Finally, selecting dyes, and combining into a fixed color triangle according to the compatibility of the dyes. For example, the domestic Longsheng dye is shown in the following attached Table 3 and figure 1 of the attached drawings.
Attached table 3
It should be noted that the technical features of the polyester filament, the polyester high stretch, the polyester core, the polyester staple fiber, the polyester low stretch, etc. related to the patent application of the present invention should be regarded as the prior art, the specific structure, the working principle, the control mode and the spatial arrangement mode of the technical features may be conventional choices in the field, and should not be regarded as the invention point of the patent of the present invention, and the patent of the present invention is not further specifically described.
It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.
Claims (8)
1. A polyester yarn dyeing method based on disperse dyes is characterized by comprising the following steps:
step S1: according to different dyeing properties of different polyester yarn materials and different total dye concentration ranges, carrying out dyeing classification and forming dyeing classification information;
step S2: different dyeing processes are used according to different dyeing classifications in the dyeing classification information;
step S3: selecting dyes of the current dyeing process, and combining into a fixed color triangle according to the compatibility of the dyes to obtain dye color triangle data.
2. The method for dyeing polyester yarn based on disperse dye according to claim 1, wherein the step S1 is implemented by the following steps:
step S1.1: dyeing and classifying the polyester filaments under different total dye concentrations;
step S1.2: dyeing and classifying the polyester high elasticity under different total dye concentrations;
step S1.3: dyeing and classifying the polyester core-spun yarn under different total dye concentrations;
step S1.4: dyeing and classifying the polyester staple fibers under different total dye concentrations;
step S1.5: and (4) dyeing and classifying the terylene low elasticity under different total dye concentrations.
3. The polyester yarn dyeing method based on disperse dyes according to claim 2, characterized in that step S1.1 is implemented as the following steps:
step S1.1.1: the dyeing of the polyester filament yarn under the condition that the total concentration of the dye is 0-0.2 percent is classified as first filament yarn dyeing;
step S1.1.2: the dyeing of the polyester filament yarn under the condition that the total concentration of the dye is 0.2-0.5 percent is classified as second filament dyeing;
step S1.1.3: the dyeing of the polyester filament yarn under the condition that the total concentration of the dye is 0.5-1.0% is classified as third filament dyeing;
step S1.1.4: the dyeing of the polyester filament yarn under the condition that the total dye concentration is 1.0-2.0% is classified as fourth filament dyeing;
step S1.1.5: the dyeing of the polyester filament yarn at a total dye concentration of more than 2.0% is classified as the fifth filament dyeing.
4. The polyester yarn dyeing method based on disperse dyes according to claim 2, characterized in that step S1.2 is implemented as the following steps:
step S1.2.1: the dyeing of the polyester high-elasticity at the total dye concentration of 0-0.2 percent is classified as first high-elasticity dyeing;
step S1.2.2: the dyeing of the terylene high elasticity under the total dye concentration of 0.2-0.5 percent is classified as second high elasticity dyeing;
step S1.2.3: the dyeing of the terylene high elasticity under the total dye concentration of 0.5-1.0% is classified as third high elasticity dyeing;
step S1.2.4: the dyeing of the terylene high elasticity under the total dye concentration of 1.0-2.0% is classified as fourth high elasticity dyeing;
step S1.2.5: the dyeing of polyester high stretch at a total dye concentration of greater than 2.0% is classified as a fifth high stretch dyeing.
5. The polyester yarn dyeing method based on disperse dyes according to claim 2, characterized in that step S1.3 is implemented as the following steps:
step S1.3.1: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 0-0.2 percent is classified as first core-spun dyeing;
step S1.3.2: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 0.2-0.5% is classified as second core-spun dyeing;
step S1.3.3: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 0.5-1.0% is classified as third core-spun dyeing;
step S1.3.4: the dyeing of the polyester core-spun yarn under the condition that the total concentration of the dye is 1.0-2.0% is classified as fourth core-spun dyeing;
step S1.3.5: dyeing of the polyester core-spun yarn at a total dye concentration of more than 2.0% is classified as fifth core-spun dyeing.
6. The polyester yarn dyeing method based on disperse dyes according to claim 2, characterized in that step S1.4 is implemented as the following steps:
step S1.4.1: the dyeing of the polyester staple fibers under the condition that the total concentration of the dye is 0-0.2 percent is classified as first staple fiber dyeing;
step S1.4.2: the dyeing of the polyester staple fibers under the condition that the total concentration of the dye is 0.2-0.5 percent is classified as second staple dyeing;
step S1.4.3: the dyeing of the polyester staple fibers under the condition that the total dye concentration is 0.5-1.0 percent is classified as third staple dyeing;
step S1.4.4: the dyeing of the polyester staple fibers under the condition that the total dye concentration is 1.0-2.0 percent is classified as fourth staple dyeing;
step S1.4.5: the dyeing of the polyester staple fibers at a total dye concentration of more than 2.0% is classified as fifth staple dyeing.
7. The polyester yarn dyeing method based on disperse dyes according to claim 2, characterized in that step S1.5 is implemented as the following steps:
step S1.5.1: the dyeing of the terylene low elasticity at the dye total concentration of 0-0.2 percent is classified as first low elasticity dyeing;
step S1.5.2: the dyeing of the terylene low elasticity at the dye total concentration of 0.2-0.5 percent is classified as the second low elasticity dyeing;
step S1.5.3: the dyeing of the terylene low elasticity at the dye total concentration of 0.5-1.0% is classified as third low elasticity dyeing;
step S1.5.4: the dyeing of the terylene low stretch at the dye total concentration of 1.0-2.0% is classified as fourth low stretch dyeing;
step S1.5.5: the dyeing of the polyester low stretch at a total dye concentration of more than 2.0% is classified as a fifth low stretch dyeing.
8. The polyester yarn dyeing method based on disperse dyes according to claim 2, characterized in that the step S2 is implemented as the following steps:
step S2.1: using a corresponding dyeing heat preservation process for the dyed and classified polyester filaments;
step S2.2: using a corresponding dyeing heat preservation process for the dyed classified terylene high elasticity;
step S2.3: using a corresponding dyeing heat preservation process for the dyed and classified polyester core-spun yarns;
step S2.4: using a corresponding dyeing heat preservation process for the dyed classified polyester staple fibers;
step S2.5: and (3) using a corresponding dyeing heat-preserving technology for the dyed and classified terylene low elasticity.
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