CN108468231B - Color matching compensation method for alcoholysis and repolymerization of regenerated polyester - Google Patents
Color matching compensation method for alcoholysis and repolymerization of regenerated polyester Download PDFInfo
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- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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- 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
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- D06P1/22—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 vat dyestuffs including indigo
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- 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
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- 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
- D06P3/348—Material containing ester groups using reactive dyes
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- D06P3/36—Material containing ester groups using dispersed dyestuffs
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Abstract
The invention relates to a color matching compensation method for alcoholysis repolymerization of regenerated polyester, which comprises the steps of firstly performing coarse color matching on regenerated polyester chips by adopting an RGB ternary color matching method, then adding the regenerated polyester chips into an alcohol solution containing a catalyst for degradation to generate monomers and/or oligomers, performing polymerization on the monomers and/or oligomers after separation and purification to generate a polymer melt, and finally performing fine color matching on the polymer melt to realize online automatic color matching compensation, wherein the coarse color matching refers to a process of adjusting the color of the regenerated polyester to be close to that of a target product by adding a dye, and the fine color matching refers to a process of adjusting the color of the regenerated polyester after the coarse color matching to be closer to that of the target product by adding the dye. The method overcomes the defects of poor stability, low accuracy, time and labor consumption and the like of manual color matching in the prior art, realizes online automatic color matching compensation by adopting an RGB (red, green and blue) ternary color matching method, improves the stability and the accuracy of color matching, and has good application prospect.
Description
Technical Field
The invention belongs to the field of color matching methods for recycled polyesters, and particularly relates to a color matching compensation method for alcoholysis repolymerization of recycled polyesters.
Background
Polyester is used as a petroleum-based synthetic polymer material which is not easy to degrade, the social reserve of waste products is very large, and in view of the pressure of environmental protection and various resources, research on recycling of polyester is becoming a hot spot of people's attention. The waste polyester alcoholysis repolymerization is to utilize reversibility of polycondensation reaction, depolymerize the waste polyester into a monomer or a polymerization intermediate, and after separation and purification, the waste polyester can be repolymerized into high-quality regenerated polyester. Therefore, the closed type cyclic regeneration of the waste polyester can be realized, and the alcoholysis regeneration method has absolute advantages in the theory for recovering the waste polyester textiles with high impurity content.
Currently, a manual color matching method is adopted in the color matching process. The skilled artisan relies on experience to determine the dyeing recipe. The manual color matching method has poor stability, low one-time accuracy and time and labor waste, and the color of the polyester can be changed along with the processing technology in the processing process. Therefore, the invention provides a method for automatic online color matching in the recycled polyester processing engineering.
Disclosure of Invention
The invention aims to overcome the defects of poor stability, low accuracy, time and labor waste and the like caused by manual color matching in the prior art, and provides a color matching compensation method for alcoholysis and repolymerization of regenerated polyester, which is a method for directly preparing fiber finished products from waste polyester raw materials. The invention adopts RGB three primary colors principle to distribute a color component with an intensity value in the range of 0-255. The color with different shades can be obtained by adjusting the related numbers, and the color is described and measured by a mathematical method. Before the regenerated polyester raw material is added into the alcoholysis reaction kettle and in the spinning process, the color difference between the regenerated polyester raw material and the color of the polymer and the color of the target product is automatically detected by an RGB color detection system, and the color is converted into RGB hexadecimal color code numerical values. The difference in color code values is compared. And then feeding the data back to a dye feeding system, and automatically adding the dye with the color code higher/lower than the corresponding R, G, B color code value to ensure that the difference value of the color codes is smaller than the specified error range. And the online automatic and accurate color matching compensation is realized by twice color matching before feeding and in the polymerization process. The waste polyester alcoholysis repolymerization is to utilize reversibility of polycondensation reaction, depolymerize the waste polyester into a monomer or a polymerization intermediate, and after separation and purification, the waste polyester can be repolymerized into high-quality regenerated polyester. Therefore, the closed type cyclic regeneration of the waste polyester can be realized, and the alcoholysis regeneration method has absolute advantages in the theory for recovering the waste polyester textiles with high impurity content.
In order to achieve the purpose, the invention adopts the technical scheme that:
a color matching compensation method for alcoholysis repolymerization of recycled polyester adopts an RGB ternary color matching method to respectively perform coarse color matching and fine color matching before and after the polymerization of the recycled polyester, thereby realizing online automatic color matching compensation;
the rough matching refers to a process of adjusting the color of the regenerated polyester to be close to that of a target product by adding a dye; the fine color matching refers to a process of adjusting the color of the recycled polyester after coarse color matching to be closer to the color of the target product by adding a dye.
As a preferred technical scheme:
the color matching compensation method for alcoholysis repolymerization of the regenerated polyester comprises the following specific steps: firstly, coarsely coloring regenerated polyester chips, then adding the regenerated polyester chips into an alcohol solution containing a catalyst for degradation to generate monomers and/or oligomers, polymerizing the monomers and/or oligomers after separation and purification to generate a polymer melt, and finally finely coloring the polymer melt.
The color matching compensation method for alcoholysis repolymerization of the recycled polyester is characterized in that the coarse color matching is carried out in a feeding device, and the fine color matching is carried out in a polymerization kettle; the feeding device and the polymerization kettle are both simultaneously provided with the RGB color sensing system and the automatic dye feeding system, so that the product color can be detected on line, the color of the product can be compared with the color of a target product, the color difference is compared with the color position database, and the data is fed back to the dye feeding system, so that automatic color matching is realized.
The color matching compensation method for alcoholysis repolymerization of the recycled polyester comprises the steps that the RGB color sensing system comprises a color sensor, an illumination light source, a signal processing circuit and a single chip microcomputer; the color sensor realizes color detection by measuring the reflectance of three primary colors constituting the color of the object, and the illumination light source constitutes an illumination system with white light emitting diodes.
The method for compensating color matching of alcoholysis repolymerization of recycled polyester comprises a feedback signal processor, an RGB dye color recognizer, a dye hopper, a dye weigher and a dye feeding device.
The color matching compensation method for alcoholysis repolymerization of the recycled polyester comprises the following steps:
firstly, under the irradiation of an illumination light source, a signal generated by a color sensor sensing the color of a measured object is amplified by a signal processing circuit and then is sent to a single chip microcomputer for processing, the single chip microcomputer sends the processed signal to a color locus database, and the illumination light source uses a white light emitting diode to form an annular 45 degree (illumination)/0 degree (measurement) annular illumination system;
then, the color locus database converts the signals into RGB hexadecimal color codes and compares the RGB hexadecimal color codes with the RGB hexadecimal color codes of the target product, when the error between more than one numerical value in the R, G, B hexadecimal color codes and the RGB hexadecimal color codes of the target product is larger than a set value, the single chip receives signals generated by the color sensor and amplified by the signal processing circuit and then processes the signals to obtain color difference values, the color difference value signals are sent to the feedback signal processor for processing, the feedback signal processor identifies the colors of the dyes through the RGB dye color identifier and sends the processed color difference value signals to the dye weighing device and the dye hopper with the corresponding color, the dye hopper feeds the dyes into the dye weighing device until the weight reaches the target value, and the dye weighing device feeds the dyes into the dye feeding device;
finally, the dye feeding device gradually adds the dye matched with the required hexadecimal color code, and the dye is repeatedly identified and processed by the color sensor and the singlechip until the error is less than or equal to a set value;
the color location database is composed of 16777216 colors which can be represented by RGB hexadecimal color codes.
In the color matching compensation method for alcoholysis repolymerization of the recycled polyester, the set value in the coarse color matching is 20, and the set value in the fine color matching is 5.
The color matching compensation method for alcoholysis repolymerization of the recycled polyester comprises the steps of mixing the alcohol solution with the solvent, wherein the alcohol solution is methanol, ethylene glycol, propylene glycol, 1, 4-butanediol, glycerol or pentaerythritol; the catalyst is zinc acetate, manganese acetate, cobalt acetate, lead acetate, sodium carbonate, sodium bicarbonate, sodium sulfate, potassium sulfate, titanium phosphate or ionic liquid.
The color matching compensation method for alcoholysis repolymerization of the recycled polyester is characterized in that the cation of the ionic liquid is
Wherein R is1，R2，R3，R4The alkyl groups have different carbon atoms, and R is the alkyl group; the anion of the ionic liquid is PF6 -、BF4 -、CH3SO3 -、F3CSO3 -、(F3CSO2)3C-、Br-Or Cl-. Although only three ionic liquids are illustrated in the examples, ionic liquids meeting the above conditions may also be suitable for use in the present invention.
Has the advantages that:
the color matching compensation method for alcoholysis repolymerization of the regenerated polyester, disclosed by the invention, has the advantages that the color difference between the color and the color of a target product in the processing process is detected by utilizing an RGB color detection system, the color difference is compared with a color position database, then the data is fed back to a dye feeding system, and the required color and the required amount of dye are automatically added, so that the online automatic color matching compensation is realized, the stability and the accuracy are more excellent, the defects of unstable and inaccurate color matching and the like caused by manual color matching in the prior art are overcome, and the application prospect is very wide.
Drawings
FIG. 1 is a schematic diagram of a color matching compensation method for alcoholysis repolymerization of a recycled polyester according to the invention.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
A color matching compensation method for alcoholysis repolymerization of recycled polyester is shown in figure 1 and comprises the following steps:
(1) establishing a color matching database comprising recycled polyester data, dye formula data and color location data, wherein the recycled polyester data comprises: lot number, name, color, raw material category; the dye formula data included: reactive dyes, vat dyes and disperse dyes, wherein 1) the reactive dye data comprises: the type of reactive dye, the fuel dosage of the padding liquor, the wetting agent dosage of the padding liquor, the caustic soda dosage of the fixing liquor, the trisodium phosphate dosage of the fixing liquor, the soda dosage of the fixing liquor, the salt dosage of the fixing liquor, the liquor dosage of the fixing liquor and the concentration of the soaping liquor; 2) vat dye data include: dye dosage of padding liquor, diffusant dosage of padding liquor, color type of padding liquor, caustic soda dosage of reducing liquor, insurance dosage of reducing liquor, color type of reducing liquor, hydrogen peroxide dosage of oxidizing liquor, liquid soap dosage of soaping liquor and soda dosage of soaping liquor; 3) the disperse dye data include: disperse dye name, migration resistance dose, permeation dose, baking soda amount, urea amount, threne dye amount, coating amount, peregal amount, and total binder liquid amount; the color bit data includes: 16777216 colors can be represented by RGB hexadecimal color code.
(2) Classifying waste regenerated polyester, cleaning, crushing, physically separating, cleaning, drying, coarsely mixing colors, depolymerizing, separating, purifying, polymerizing, finely mixing colors and spinning.
The rough color matching refers to adding dye into a feeding device provided with an RGB color sensing system and an automatic dye feeding system to adjust the color of regenerated polyester chips to be close to that of a target product, wherein the RGB color sensing system comprises a color sensor, an illumination light source, a signal processing circuit and a single chip microcomputer, the color sensor realizes color detection by measuring the reflection ratio of three primary colors forming the object color, and the illumination light source forms an illumination system by using white light emitting diodes; the automatic dye feeding system comprises a feedback signal processor, an RGB dye color recognizer, a dye hopper, a dye weighing device and a dye feeding device.
The fine color matching means that methanol containing zinc acetate is added into a polymerization kettle provided with an RGB color sensing system and an automatic dye feeding system for degradation to generate monomers and/or oligomers, the monomers and/or oligomers are separated and purified and then polymerized to generate polymer melt, and finally dye is added into the polymer melt to adjust the color of the regenerated polyester after coarse color matching to enable the color of the regenerated polyester to be closer to that of a target product.
The process of coarse color matching or fine color matching specifically comprises the following steps:
firstly, under the irradiation of an illumination light source, a signal generated by a color sensor sensing the color of a measured object is amplified by a signal processing circuit and then is sent to a single chip microcomputer for processing, and the single chip microcomputer sends the processed signal to a color locus database;
then, the color locus database converts the signals into RGB hexadecimal color codes and compares the RGB hexadecimal color codes with the RGB hexadecimal color codes of the target product, when the error between more than one numerical value in the R, G, B hexadecimal color codes and the RGB hexadecimal color codes of the target product is larger than a set value, the single chip receives signals generated by the color sensor and amplified by the signal processing circuit and then processes the signals to obtain color difference values, the color difference value signals are sent to the feedback signal processor for processing, the feedback signal processor identifies the colors of the dyes through the RGB dye color identifier and sends the processed color difference value signals to the dye weighing device and the dye hopper with the corresponding color, the dye hopper feeds the dyes into the dye weighing device until the weight reaches the target value, and the dye weighing device feeds the dyes into the dye feeding device;
and finally, gradually adding the dye matched with the required hexadecimal color code into the dye feeding device, and repeatedly identifying and processing the dye by the color sensor and the single chip until the error is less than or equal to a set value, wherein the set value in the coarse color matching is 20, and the set value in the fine color matching is 5.
Example 2
A color matching compensation method for alcoholysis repolymerization of regenerated polyester basically corresponds to the step of example 1, except that in the fine color matching process, the added alcohol solution containing the catalyst is ethylene glycol containing manganese acetate.
Example 3
A color matching compensation method for alcoholysis repolymerization of recycled polyester basically corresponds to the step of example 1, except that in the fine color matching process, the added alcohol solution containing the catalyst is propylene glycol containing cobalt acetate.
Example 4
A color matching compensation method for alcoholysis repolymerization of recycled polyester basically corresponds to the step of example 1, except that in the fine color matching process, the added alcohol solution containing the catalyst is 1, 4-butanediol containing lead acetate.
Example 5
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the steps are basically the same as those in example 1, except that in the fine color matching process, the alcohol solution containing the catalyst is glycerol containing sodium carbonate.
Example 6
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the steps are basically the same as those in example 1, except that in the fine color matching process, the alcohol solution containing the catalyst is pentaerythritol of sodium bicarbonate.
Example 7
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the steps are basically the same as those in example 1, except that in the fine color matching process, the alcohol solution containing the catalyst is methanol of sodium sulfate.
Example 8
A color matching compensation method for alcoholysis repolymerization of recycled polyester is basically the same as that in example 1, except that in the fine color matching process, the alcohol solution containing a catalyst is ethylene glycol of potassium sulfate.
Example 9
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the steps are basically the same as those in example 1, except that in the fine color matching process, the added alcohol solution containing the catalyst is propylene glycol of titanium phosphate.
Example 10
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the steps are basically the same as those in example 1, except that in the fine color matching process, the added alcohol solution containing the catalyst is propylene glycol of chlorinated-1 butyl-3 methyl imidazole salt.
Example 11
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the procedure is basically the same as that in example 1, except that in the fine color matching process, the alcohol solution containing the catalyst is ethylene glycol of 1-butyl-3-methylimidazole hexafluorophosphate.
Example 12
A color matching compensation method for alcoholysis repolymerization of recycled polyester, the steps are basically the same as those in example 1, except that in the fine color matching process, the alcohol solution containing the catalyst is pentaerythritol of 1-butyl-3 methylimidazolium tetrafluoroborate.
Claims (5)
1. A color matching compensation method for alcoholysis repolymerization of recycled polyester is characterized by comprising the following steps: coarse color matching and fine color matching are respectively carried out before and after the polymerization of the recycled polyester by adopting an RGB ternary color matching method, so that online automatic color matching compensation is realized;
the rough matching refers to a process of adjusting the color of the regenerated polyester to be close to that of a target product by adding a dye; the fine matching refers to a process of adjusting the color of the regenerated polyester after coarse matching to be closer to the color of a target product by adding a dye;
the coarse color matching is carried out in a feeding device, and the fine color matching is carried out in a polymerization kettle; the feeding device and the polymerization kettle are both simultaneously provided with an RGB color sensing system and an automatic dye feeding system;
the RGB color sensing system comprises a color sensor, an illumination light source, a signal processing circuit and a single chip microcomputer; the color sensor realizes color detection by measuring the reflection ratio of three primary colors forming the object color, and the illumination light source forms an illumination system by using a white light-emitting diode;
the automatic dye feeding system comprises a feedback signal processor, an RGB dye color recognizer, a dye hopper, a dye weigher and a dye feeding device;
the coarse color matching or the fine color matching process comprises the following steps:
firstly, under the irradiation of an illumination light source, a signal generated by a color sensor sensing the color of a measured object is amplified by a signal processing circuit and then is sent to a single chip microcomputer for processing, and the single chip microcomputer sends the processed signal to a color locus database;
then, the color locus database converts the signals into RGB hexadecimal color codes and compares the RGB hexadecimal color codes with the RGB hexadecimal color codes of the target product, when the error between more than one numerical value in the R, G, B hexadecimal color codes and the RGB hexadecimal color codes of the target product is larger than a set value, the single chip receives signals generated by the color sensor and amplified by the signal processing circuit and then processes the signals to obtain color difference values, the color difference value signals are sent to the feedback signal processor for processing, the feedback signal processor identifies the colors of the dyes through the RGB dye color identifier and sends the processed color difference value signals to the dye weighing device and the dye hopper with the corresponding color, the dye hopper feeds the dyes into the dye weighing device until the weight reaches the target value, and the dye weighing device feeds the dyes into the dye feeding device;
finally, the dye feeding device gradually adds the dye matched with the required hexadecimal color code, and the dye is repeatedly identified and processed by the color sensor and the singlechip until the error is less than or equal to a set value;
the color location database is composed of 16777216 colors which can be represented by RGB hexadecimal color codes.
2. The color matching compensation method for alcoholysis repolymerization of recycled polyester as claimed in claim 1, which comprises the following steps: firstly, coarsely coloring regenerated polyester chips, then adding the regenerated polyester chips into an alcohol solution containing a catalyst for degradation to generate monomers and/or oligomers, polymerizing the monomers and/or oligomers after separation and purification to generate a polymer melt, and finally finely coloring the polymer melt.
3. The method of claim 1, wherein the coarse color matching setting is 20 and the fine color matching setting is 5.
4. The method for color matching compensation of alcoholysis repolymerization of recycled polyesters according to claim 2, wherein said alcohol solution is methanol, ethylene glycol, propylene glycol, 1, 4-butanediol, glycerol or pentaerythritol; the catalyst is zinc acetate, manganese acetate, cobalt acetate, lead acetate, sodium carbonate, sodium bicarbonate, sodium sulfate, potassium sulfate, titanium phosphate or ionic liquid.
5. The method of claim 4, wherein the cation of the ionic liquid is
Wherein R is1，R2，R3，R4The alkyl groups have different carbon atoms, and R is the alkyl group; the anion of the ionic liquid is PF6 -、BF4 -、CH3SO3 -、F3CSO3 -、(F3CSO2)3C-、Br-Or Cl-。
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| JP2007254904A (en) * | 2006-03-22 | 2007-10-04 | Komatsu Seiren Co Ltd | Polyester-based textile product for recycling, method for decoloring polyester-based textile product for recycling, and method for recycling polyester-based textile product |
| CN102750403A (en) * | 2012-05-28 | 2012-10-24 | 嘉兴学院 | Formula screening and correction method for spun-dyed yarn color matching |
| CN104785397A (en) * | 2015-04-01 | 2015-07-22 | 电子科技大学 | Full-automatic color measurement color blending paint spraying system |
| CN107523895A (en) * | 2017-07-20 | 2017-12-29 | 东华大学 | A kind of coloured regenerative polyester staple fiber and preparation method thereof |
| CN107652423A (en) * | 2017-09-18 | 2018-02-02 | 浙江理工大学 | A kind of method that Waste Polyester alcoholysis method prepares regeneration low-melting point polyester |
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