CN115679720A - Cold transfer printing method for acid dye - Google Patents
Cold transfer printing method for acid dye Download PDFInfo
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- CN115679720A CN115679720A CN202211479964.XA CN202211479964A CN115679720A CN 115679720 A CN115679720 A CN 115679720A CN 202211479964 A CN202211479964 A CN 202211479964A CN 115679720 A CN115679720 A CN 115679720A
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- 238000010023 transfer printing Methods 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000000980 acid dye Substances 0.000 title claims abstract description 40
- 239000004744 fabric Substances 0.000 claims abstract description 90
- 238000000576 coating method Methods 0.000 claims description 65
- 239000011248 coating agent Substances 0.000 claims description 60
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 48
- 239000003795 chemical substances by application Substances 0.000 claims description 47
- 238000007639 printing Methods 0.000 claims description 44
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 39
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 39
- 238000001035 drying Methods 0.000 claims description 33
- 238000010025 steaming Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 16
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- 239000000463 material Substances 0.000 claims description 12
- 238000010008 shearing Methods 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
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- 238000005406 washing Methods 0.000 claims description 11
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- 238000002360 preparation method Methods 0.000 claims description 4
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- 238000009501 film coating Methods 0.000 claims description 3
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- 239000000975 dye Substances 0.000 abstract description 18
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Abstract
The invention discloses a cold transfer printing method of an acid dye, belonging to the technical field of textile dyeing methods; firstly, preparing a transfer printing film, and carrying out cold transfer printing on the pretreated plant on the basis; compared with the prior art, the transfer printing method has the advantages that plate making is not needed, the application range of the fabric is wide, the dye utilization rate is high, the transfer printing film can be repeatedly utilized, and the major breakthrough of no paper consumption, no steam consumption and small discharge capacity in the transfer printing process is realized.
Description
Technical Field
The invention relates to the technical field of textile dyeing methods, in particular to an acid dye cold transfer printing method.
Background
The acid dye printing is mainly performed by the traditional flat rotary screen printing, and the problems of high plate making cost, long production period and high energy consumption exist. Digital printing has the advantages of maximum utilization of dye in production, flexible size of the printing, no limitation of color register number, and obvious advantages in energy saving and consumption reduction, and thus becomes a hot point of research in recent years. However, digital printing has limitations on fabric flatness and gram weight, is not suitable for heavy fabrics, knitted fabrics with poor dimensional stability and jacquard fabrics, and has the problems of high ink price and easy blockage of a digital printing nozzle by fiber batting.
The transfer printing has the characteristics of high dye utilization rate, small printing paste usage amount and small discharge capacity. However, only disperse dye thermal transfer printing is really used for large-scale production at present, and the processing objects are only limited to terylene.
Therefore, how to solve the problems of high energy consumption and large pollution commonly existing in the acid dye flat rotary screen printing technology, effective connection is formed between the traditional flat rotary screen printing technology and the modern digital printing and transfer printing technology, the steam consumption is reduced, the colored sewage discharge is reduced, and the technical problem to be solved is urgently needed by a plurality of printing and dyeing enterprises.
In order to solve the problems, the invention provides a method for cold transfer printing of acid dyes.
Disclosure of Invention
The invention aims to provide a method for cold transfer printing of acid dyes to solve the problems mentioned in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for cold transfer printing of acid dyes comprises the steps of firstly preparing a transfer printing film, and carrying out cold transfer printing on a pretreated plant on the basis of the transfer printing film; the method specifically comprises the following steps:
s1, adopting a BOPP film as a transfer printing carrier base material, and coating an ink-absorbing release agent on the BOPP film;
s2, inputting the designed pattern image into a computer, spray-printing acid dye ink on the BOPP film coated with the ink-absorbing release agent and prepared in the S1 by using a digital printing machine to form a pattern, preparing a transfer film, and drying the transfer film;
s3, performing pickling pretreatment on the fabric;
s4, cold transfer printing is carried out on the pretreated fabric by adopting a rolling mill, and the fabric and the transfer film simultaneously complete a transfer printing process through a group of compression rollers;
s5, steaming and fixing the fabric subjected to cold transfer printing;
and S6, after color fixing is finished, washing, soaping and drying the fabric in sequence, and finishing printing work.
Preferably, the BOPP film used in S1 has a thickness of 0.1 to 1mm, preferably 0.1mm, 0.3mm, 0.5mm, and 1mm.
Preferably, the BOPP film coating operation mentioned in S1 specifically includes the following:
s1.1, a coating liquid preparation process: preparing 1% of ink-absorbing release agent, adding deionized water into the ink-absorbing release agent, and stirring and mixing uniformly to obtain a coating liquid; placing the obtained coating liquid in a high-shear dispersion emulsifying machine for shearing treatment for 10-20 min;
s1.2, coating process: injecting the coating liquid subjected to shearing treatment in the S1.2 into a transfer coating machine to finish the coating operation; among them, the coating thickness is preferably 0.1 to 0.4mm.
Preferably, the said ink-receptive release agent mentioned in S1 is QP100MH dow hydroxyethyl cellulose.
Preferably, the drying temperature in the S2 is 30-40 ℃, and the drying time is 4-8 min.
Preferably, the fabric mentioned in S3 is silk or chinlon fabric; the conditions of the pickling pretreatment are as follows: padding in 0.5-3g/L acetic acid solution at room temperature, wherein the liquid carrying rate is 70-120%.
Preferably, in S4, the pressure of the pressure roller is 130-160 kPa, and the transfer time is 20-50S.
Preferably, the steaming temperature in the S5 is 100 ℃, and the steaming time is 5-20 min.
Compared with the prior art, the invention provides an acid dye cold transfer printing method, which has the following beneficial effects:
(1) The cold transfer printing film prepared by the invention has high dye transfer rate, can replace transfer printing paper, realizes cyclic utilization, and breaks through the technical bottlenecks of low dye transfer rate and difficult recycling of the existing transfer printing paper;
(2) The cold transfer printing method of the acid dye has the characteristics of high dye utilization rate and cyclic utilization of the cold transfer printing film, and realizes the major breakthrough of no paper consumption and small discharge capacity in the transfer printing process. The defects that the traditional flat rotary screen printing is limited by the size of the pattern, the color register number and the plate making cost are high are overcome, and the defects that the digital printing has limitation on the structure, the flatness and the gram weight of the fabric are also overcome.
Drawings
FIG. 1 is a schematic process flow diagram of a cold transfer printing method for acid dyes according to the present invention;
fig. 2 is a schematic diagram illustrating the influence of the drying time of the transfer film on the cold transfer printing performance in embodiment 3 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1:
referring to fig. 1, a method for cold transfer printing of acid dyes is characterized in that a transfer film is prepared first, and on the basis of the transfer film, cold transfer printing is performed on the pretreated plants; the method specifically comprises the following steps:
s1, adopting a 0.1-1 mm BOPP film as a transfer printing carrier base material, and coating QP100MH ceramic hydroxyethyl cellulose as an ink absorption release agent on the BOPP film;
the BOPP film coating operation specifically includes the following:
s1.1, a coating liquid preparation process: preparing 1% of ink-absorbing release agent, adding deionized water into the ink-absorbing release agent, and stirring and mixing uniformly to obtain a coating liquid; placing the obtained coating liquid in a high-shear dispersion emulsifying machine for shearing treatment for 10-20 min;
s1.2, coating process: injecting the coating liquid subjected to shearing treatment in the S1.2 into a transfer coating machine to finish the coating operation; wherein, the coating thickness is preferably 0.1-0.4 mm;
s2, inputting the designed pattern image into a computer, spray-printing acid dye ink on the BOPP film coated with the ink-absorbing release agent prepared in the S1 by using a digital printing machine to form a pattern, preparing a transfer film, and drying the transfer film for 4-8 min at the temperature of 30-40 ℃;
s3, performing pickling pretreatment on the silk or nylon fabric, namely padding the silk or nylon fabric in 0.5-3g/L acetic acid solution at room temperature, wherein the liquid carrying rate is 70-120%;
s4, cold transfer printing is carried out on the pretreated fabric by adopting a rolling mill, the fabric and the transfer film simultaneously complete a transfer printing process through a group of compression rollers with the pressure of 130-160 kPa, and the transfer printing time is 20-50S;
s5, steaming and fixing the fabric subjected to cold transfer printing at 100 ℃, wherein the steaming time is 5-20 min;
and S6, after color fixing is finished, washing, soaping and drying the fabric in sequence, and finishing printing work.
Based on the above, the best technical solution obtained by combining the example analysis is as follows:
(1) A BOPP film with the thickness of 0.5mm is used as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) The preparation process of the coating liquid comprises the following steps: adding 1% of ink absorbing release agent into deionized water, stirring and mixing uniformly, and placing the prepared coating liquid into a high-shear dispersion emulsifying machine for shearing treatment for 10min.
(3) The coating process comprises the following steps: the coating solution was applied to the surface of a BOPP film with a film thickness of 0.2mm using a transfer coating machine.
(4) Preparing a transfer printing film: inputting the designed pattern image into a computer, directly spraying and printing the acid dye ink on the BOPP film coated with the ink-absorbing parting agent by using a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(5) Carrying out immersion acid pretreatment on the fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 80 percent.
(6) And (3) cold transfer printing process: and (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s.
(7) And (3) steaming fixation process: and steaming the fabric subjected to cold transfer printing at the steaming temperature of 100 ℃ for 8min.
(8) And then, washing, soaping and drying the fabric, and finishing printing.
Example 2:
the influence of the dosage of the release agent on the viscosity, the water holding capacity and the transfer printing performance of the coating liquid is a method for cold transfer printing of the acid dye, which comprises the following steps:
(1) A BOPP film with the thickness of 0.5mm is used as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And stirring and mixing the ink absorption release agent and the deionized water uniformly, and placing the mixture in a high-shear dispersion emulsifying machine for shearing treatment for 10min to prepare the coating liquid. The coating solution is applied to the surface of the BOPP film by a transfer coating machine, and the thickness of the coating film is 0.2mm.
(3) Inputting the designed pattern image into a computer, directly spraying and printing the acid dye ink on the BOPP film coated with the ink-absorbing parting agent by using a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(4) And (3) carrying out acid dipping pretreatment on the silk fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 80 percent.
(5) And (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s. And steaming the fabric subjected to the cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing printing.
Coating liquid is prepared under the conditions that the mass fractions of the ink absorption release agent are 0.5 percent, 1 percent, 1.5 percent and 2 percent respectively, the viscosity, the water holding capacity and the K/S value of the printed product of the coating liquid are measured, and the results are shown in table 1.
TABLE 1 influence of Release agent dosage on coating fluid viscosity, water holding Properties and transfer printing Properties
The coating liquid has proper viscosity, and the viscosity is generally higher than 4500 mPas, so that the requirement of digital printing can be met. The viscosity is too low, and the ink-jet ink can not uniformly cover the surface of the transfer printing carrier substrate; too high viscosity results in poor strike-through and incomplete patterning. The water holding capacity indicates the hydration ability of the coating liquid, and the better the water holding capacity, the stronger the hydration ability of the coating liquid. The water holding capacity of the general coating liquid is about 0.2cm, and the phenomenon of bleeding does not occur during digital printing.
As can be seen from Table 1, within a certain range, the K/S value of the fabric is increased along with the increase of the dosage of the release agent, and the obtained pattern is clearer, so that the substrate and the wet fabric are favorably and closely attached during transfer printing. When the amount exceeds 1%, K/S is rather decreased, probably because the increase in viscosity hinders the release of the dye from the release agent, which is disadvantageous for dyeing the fabric.
Example 3:
influence of transfer printing film drying time on cold transfer printing performance
A method for cold transfer printing of acid dyes comprises the following steps:
(1) A BOPP film with the thickness of 0.5mm is used as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And stirring and mixing the ink absorption release agent and the deionized water uniformly, and placing the mixture in a high-shear dispersion emulsifying machine for shearing treatment for 10min to prepare the coating liquid. The coating solution was applied to the surface of a BOPP film with a film thickness of 0.2mm using a transfer coating machine.
(3) Inputting the designed pattern image into a computer, directly spraying and printing acid dye ink on the BOPP film coated with the ink-absorbing parting agent by a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for different times at 40 ℃.
(4) Carrying out acid dipping pretreatment on the silk fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 80 percent.
(5) And (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s. And steaming the fabric subjected to cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing printing.
By adopting the process, the drying time of the transfer printing film is adjusted to be 0min, 2min, 4min, 6min, 8min and 10min respectively, and the K/S value of the cold transfer printing fabric is tested, as shown in figure 2.
As can be seen from fig. 2, in the first 6min, the color depth K/S value of the front surface of the printed fabric gradually increases with the increase of the drying time, because the liquid carrying rate of the fabric is a determined value, the viscosity of the release agent of the transfer film determines the degree of adhesion between the release agent and the fabric, and when the humidity is high, the viscosity of the release agent is low, the amount of the transferred color paste is small, the pattern is incomplete, and the printed pattern is exudation. As the drying time increases, the viscosity increases and the amount of slurry carried away by the fabric transfer increases. When the drying time exceeds 6min, the K/S value of the front surface of the printed fabric is gradually reduced because the color paste has larger drying degree, smaller humidity and smaller viscosity, the degree of adhesion with the fabric is reduced under the same liquid carrying rate, the amount of the color paste transferred to the fabric is reduced, and most of the color paste is remained on the transfer printing film.
Example 4:
influence of film thickness on surface of BOPP film on cold transfer printing performance
A method for cold transfer printing of acid dyes comprises the following steps:
(1) A BOPP film with the thickness of 0.5mm is used as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And stirring and mixing the ink absorption release agent and the deionized water uniformly, and placing the mixture in a high-shear dispersion emulsifying machine for shearing treatment for 10min to prepare the coating liquid. The coating solution was applied to the BOPP film surface using a transfer coater.
(3) Inputting the designed pattern image into a computer, directly spraying and printing acid dye ink on the BOPP film coated with the ink-absorbing parting agent by adopting a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(4) And (3) carrying out acid dipping pretreatment on the silk fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 80 percent.
(5) And (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s. And steaming the fabric subjected to the cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing printing.
By adopting the process, the thickness of the coating film is adjusted to be 0.1mm, 0.2mm, 0.3mm and 0.4mm respectively, and the K/S value of the cold transfer printing fabric is tested and shown in Table 2.
TABLE 2 influence of film thickness on Cold transfer printing Properties
As can be seen from Table 2, the film thickness has a large influence on the transfer printing properties. When the thickness of the coating film is less than 0.2mm, the problems of small ink supply amount and uneven printing are easily caused. When the thickness of the coating film is more than 0.2mm, the ink layer is not easy to dry, the fluidity of the ink is poor, and the transfer printing effect is also affected.
Example 5:
effect of Pickling concentration on Cold transfer printing Properties
A method for cold transfer printing of acid dyes comprises the following steps:
(1) A BOPP film with the thickness of 0.5mm is used as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And (3) stirring and mixing the ink-absorbing release agent and deionized water uniformly, placing the mixture into a high-shear dispersion emulsifying machine, and performing shear treatment for 10min to prepare a coating liquid. The coating solution was applied to the surface of a BOPP film with a film thickness of 0.2mm using a transfer coating machine.
(3) Inputting the designed pattern image into a computer, directly spraying and printing the acid dye ink on the BOPP film coated with the ink-absorbing parting agent by using a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(4) Carrying out acid dipping pretreatment on the silk fabric: the acetic acid solution was padded at room temperature with a liquid pick-up of 80%.
(5) And (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s. And steaming the fabric subjected to cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing printing.
By adopting the process, the concentration of the acetic acid solution in the pickling pretreatment is adjusted to be 1,2,3,4g/L respectively, and the K/S value of the cold transfer printing fabric is tested and shown in Table 3.
TABLE 3 Effect of acetic acid solution concentration on Cold transfer printing Performance
As can be seen from Table 3, the concentration of the acetic acid solution has a large influence on the performance of the transfer printing, and the color yield is the highest when the concentration of the acetic acid solution is 2 g/L. The acid dye has higher dyeing capability on silk fiber and can dye in a weak acid bath, so the pH value of the cloth surface must be adjusted according to the structure and the performance of the dye. The transfer printing is generally regulated by padding with an acetic acid solution. When the pH value is near the isoelectric point of the silk, the dye and the fiber are combined mainly by ionic bonds; when the pH value is larger than the isoelectric point of silk, the dye dyes the fiber mainly by hydrogen bonds and Van der Waals attraction.
Example 6:
influence of immersion acid pretreatment cloth surface liquid rate on cold transfer printing performance
A method for cold transfer printing of acid dyes comprises the following steps:
(1) A BOPP film with the thickness of 0.5mm is adopted as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And stirring and mixing the ink absorption release agent and the deionized water uniformly, and placing the mixture in a high-shear dispersion emulsifying machine for shearing treatment for 10min to prepare the coating liquid. The coating solution was applied to the surface of a BOPP film with a film thickness of 0.2mm using a transfer coating machine.
(3) Inputting the designed pattern image into a computer, directly spraying and printing acid dye ink on the BOPP film coated with the ink-absorbing parting agent by adopting a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(4) Carrying out acid dipping pretreatment on the silk fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rates are 70%, 80%, 90%, 100% and 110% respectively.
(5) And (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s. And steaming the fabric subjected to cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing printing.
By adopting the process, the liquid carrying rates in the pickling pretreatment are respectively changed to be 70%, 80%, 90%, 100% and 110%. The cold transfer printed fabrics were tested for K/S values as shown in Table 4.
TABLE 4 influence of liquid pickup on Cold transfer printing Performance
As can be seen from Table 4, when the liquid carrying rate is low, the dye transfer rate is low; when the liquid carrying rate reaches a certain value, the sufficient transfer rate of the dye can be ensured. However, if the liquid carrying rate of the fabric is too high, the pH value of the cloth surface is increased, and in addition, the transfer printing pattern also has a bleeding phenomenon, so that the transfer printing effect is influenced. Therefore, the proper fabric liquid carrying rate is a key factor for determining the cold transfer printing effect, and can be adjusted according to the variety and the model of the fabric.
Example 7:
effect of transfer pressure on Cold transfer printing Performance
A method for cold transfer printing of acid dyes comprises the following steps:
(1) A BOPP film with the thickness of 0.5mm is adopted as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And stirring and mixing the ink absorption release agent and the deionized water uniformly, and placing the mixture in a high-shear dispersion emulsifying machine for shearing treatment for 10min to prepare the coating liquid. The coating solution was applied to the surface of a BOPP film with a film thickness of 0.2mm using a transfer coating machine.
(3) Inputting the designed pattern image into a computer, directly spraying and printing the acid dye ink on the BOPP film coated with the ink-absorbing parting agent by using a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(4) Carrying out acid dipping pretreatment on the silk fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 80 percent.
(5) And (3) cold transfer printing is carried out on the pretreated fabric by adopting a rolling mill, the fabric and the transfer film simultaneously pass through a group of press rolls to complete the transfer printing process, the pressure of the press rolls is respectively adjusted to 130, 140, 150 and 160kPa, and the transfer printing time is 30s. And steaming the fabric subjected to cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing printing.
Using the above process, the K/S values of the cold transfer printed fabrics were tested with varying transfer pressures, as shown in Table 5.
TABLE 5 Effect of transfer pressure on Cold transfer printing Performance
As can be seen from Table 5, the K/S value transfer pressure of the fabric increases during the transfer, which is probably because more color paste, which is a carrier of the dye, is extruded onto the fabric as the transfer pressure increases, and the amount of the naturally carried dye increases, so that more dye is transferred and diffused to the fabric. When the pressure exceeds 150kPa, the transfer ratio is improved, but blurring of the pattern is caused.
And (3) analysis summary:
in combination with the contents described in examples 1 to 7, it is possible to obtain:
1. the acid dye cold transfer printing method developed by the invention has the characteristics of high dye utilization rate and recyclable cold transfer printing film, and realizes the major breakthrough of no paper consumption and small discharge capacity in the transfer printing process.
2. Better transfer printing effect can be obtained by controlling parameters of the transfer printing film base material, a parting agent coating process, an acid dipping pretreatment process, a transfer printing process and the like.
3. The comprehensive optimal embodiment is as follows:
(1) A BOPP film with the thickness of 0.5mm is used as a transfer printing carrier base material, and an ink absorption release agent is coated on the surface of the BOPP film.
(2) And (3) stirring and mixing the ink-absorbing release agent and deionized water uniformly, placing the mixture into a high-shear dispersion emulsifying machine, and performing shear treatment for 10min to prepare a coating liquid. The coating solution was applied to the surface of a BOPP film with a film thickness of 0.2mm using a transfer coating machine.
(3) Inputting the designed pattern image into a computer, directly spraying and printing acid dye ink on the BOPP film coated with the ink-absorbing parting agent by adopting a digital printing machine to form a pattern, preparing a transfer printing film, and drying the transfer printing film for 6min at 40 ℃.
(4) Carrying out acid dipping pretreatment on the silk fabric: padding 2g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 80 percent.
(5) And (3) carrying out cold transfer printing on the pretreated fabric by adopting a rolling mill, simultaneously finishing the transfer printing process by the fabric and the transfer film through a group of press rolls, adjusting the pressure of the press rolls to be 150kPa, and carrying out the transfer printing for 30s. And steaming the fabric subjected to the cold transfer printing at the steaming temperature of 100 ℃ for 8min. And then, washing, soaping and drying the fabric, and finishing transfer printing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A method for cold transfer printing of acid dyes is characterized in that firstly, a transfer printing film is prepared, and on the basis, cold transfer printing is carried out on a pretreated plant; the method specifically comprises the following steps:
s1, adopting a BOPP film as a transfer printing carrier base material, and coating an ink absorption release agent on the BOPP film;
s2, inputting the designed pattern image into a computer, spray-printing acid dye ink on the BOPP film coated with the ink-absorbing release agent and prepared in the S1 by using a digital printing machine to form a pattern, preparing a transfer film, and drying the transfer film;
s3, performing pickling pretreatment on the fabric;
s4, cold transfer printing is carried out on the pretreated fabric by adopting a rolling mill, and the fabric and the transfer film simultaneously complete a transfer printing process through a group of press rolls;
s5, steaming and fixing the fabric subjected to cold transfer printing;
and S6, after color fixing is finished, washing, soaping and drying the fabric in sequence, and finishing printing work.
2. An acid dye cold transfer printing process according to claim 1, wherein the BOPP film used in S1 has a thickness of 0.1 to 1mm, preferably 0.1mm, 0.3mm, 0.5mm and 1mm.
3. The acid dye cold transfer printing method according to claim 1, wherein the BOPP film coating operation mentioned in S1 comprises the following steps:
s1.1, a coating liquid preparation process: preparing 1% of ink-absorbing release agent, adding deionized water into the ink-absorbing release agent, and stirring and mixing uniformly to obtain a coating liquid; placing the obtained coating liquid in a high-shear dispersion emulsifying machine for shearing treatment for 10-20 min;
s1.2, a coating process: injecting the coating liquid subjected to shearing treatment in the S1.2 into a transfer coating machine to finish the coating operation; among them, the coating thickness is preferably 0.1 to 0.4mm.
4. An acid dye cold transfer printing process according to claim 1, wherein said ink-receptive release agent in S1 is preferably QP100MH dow hydroxyethyl cellulose.
5. The cold transfer printing method for acid dyes according to claim 1, characterized in that the drying temperature in S2 is 30-40 ℃ and the drying time is 4-8 min.
6. The cold transfer printing method for acid dyes according to claim 1, characterized in that the fabric mentioned in S3 is silk or nylon fabric; the conditions of the pickling pretreatment are as follows: padding 0.5-3g/L of acetic acid solution at room temperature, wherein the liquid carrying rate is 70-120%.
7. The cold transfer printing method for acid dyes according to claim 1, characterized in that the pressure of the pressure roller in S4 is 130-160 kPa, and the transfer time is 20-50S.
8. The acid dye cold transfer printing method according to claim 1, wherein the steaming temperature in S5 is 100 ℃, and the steaming time is 5-20 min.
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Application publication date: 20230203 |