CN110804340A - Single-component silk-screen printing ink for treatment-free PET (polyethylene terephthalate) material - Google Patents
Single-component silk-screen printing ink for treatment-free PET (polyethylene terephthalate) material Download PDFInfo
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- C09D11/00—Inks
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- C09D11/10—Printing inks based on artificial resins
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
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Abstract
The invention discloses a single-component silk-screen printing ink for a treatment-free PET material, which comprises the following components in parts by weight: 5-20 parts of saturated polyester resin, 10-30 parts of organic silicon modified resin, 30-60 parts of solvent, 0.5-1 part of defoaming agent, 0.5-1 part of flatting agent, 2-5 parts of dispersing agent, 5-25 parts of pigment, 5-20 parts of filler and 0.5-1 part of wax powder, wherein the solvent is one or a mixture of two of ketone solvent and ester solvent. The raw materials are selected as the components of the single-component silk-screen printing ink, the finally prepared silk-screen printing ink has excellent water resistance, acid resistance and alkali resistance, and excellent temperature resistance, scratch resistance and scratch resistance, and meanwhile, the problem of poor adhesive force of the existing silk-screen printing ink applied to a non-processed PET material is effectively solved, the processing technology of the PET material is reduced, the service time of the printing ink is optimized, the production efficiency is improved, and more diversified choices can be provided on the design of a printing scheme of the PET material.
Description
Technical Field
The invention relates to a screen printing ink, in particular to a single-component screen printing ink for a treatment-free PET material.
Background
The PET material has excellent physical property, chemical property, dimensional stability, recoverability and transparency, and can be widely applied to the fields of photosensitive materials, electrons, electrical insulation, reflecting materials and industrial films. The surface tension of PET material is too low, and physical or chemical treatment is usually needed to improve the surface tension to improve the printing adaptability, but the physical treatment (such as corona treatment, flame treatment and the like) has timeliness, particularly in high-temperature and high-humidity environment, the surface tension of the PET material after the physical treatment is easier to attenuate, and the chemical treatment (such as thermosetting coating, chemical liquid etching and the like) increases the operation process, increases the cost and also generates VOC emission. Most PET materials need to be subjected to the physical or chemical treatment, the printing ink has enough adhesive force to meet the printing applicability, untreated PET materials can only meet the coating requirement by virtue of two-component reaction printing ink or thermosetting printing ink, if the two-component reaction printing ink needs to be prepared at present, the redundant printing ink is wasted after the reaction time is exceeded, and if the thermosetting printing ink needs to be heated by baking equipment to be cured into a film, so that the existing screen printing ink and the preparation technology need to be improved.
Disclosure of Invention
Aiming at the defects of poor ink adhesion, time-consuming pretreatment of the PET material and the like in the prior art, the invention provides a novel single-component silk-screen ink for a treatment-free PET material.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a single-component silk-screen printing ink for a treatment-free PET material comprises the following components in parts by weight:
5-20 parts of saturated polyester resin,
10-30 parts of organic silicon modified resin,
30-60 parts of a solvent,
0.5 to 1 part of defoaming agent,
0.5 to 1 part of a leveling agent,
2-5 parts of a dispersing agent,
5-25 parts of a pigment,
5-20 parts of a filler,
0.5 to 1 part of wax powder,
the solvent is one or a mixture of two of ketone solvent and ester solvent, and the preparation method comprises the following steps:
s1, taking 10-30% of the total weight of the solvent and the saturated polyester resin in the weight ratio, putting the saturated polyester resin into a container, heating the saturated polyester resin to 60 ℃, and stirring the saturated polyester resin for 30-60 minutes at a linear speed of 7-10 m/S to disperse the saturated polyester resin in the solvent to obtain a mixed resin liquid A with a solid content of 50%;
s2, taking 20-30% of the total weight of the solvent and the organic silicon modified resin in the weight ratio, putting the organic silicon modified resin into a container, heating to 60 ℃, and stirring for 30-60 minutes at a linear speed of 7-10 m/S to disperse the organic silicon modified resin in the solvent to obtain a mixed resin liquid B with a solid content of 50%;
s3, putting the residual solvent and the dispersant in the weight ratio into a container, stirring for 10 minutes at a linear speed of 3-5 m/S, and dissolving the dispersant in the solvent to obtain a mixed dispersion liquid;
s4, adding the pigment, the filler and the wax powder in the weight ratio into the mixed dispersion liquid, and stirring for 30 minutes at a linear speed of 7-10 m/S to obtain slurry subjected to dispersion treatment;
s5, mixing the mixed resin liquid A with the slurry, and stirring for 30 minutes at a linear speed of 7-10 m/S to obtain pre-dispersed color paste;
and S6, transferring the pre-dispersed color paste into a turbine sand mill for grinding, controlling the grinding temperature at 30-40 ℃, grinding the pre-dispersed color paste into particles with the diameter D90=500nm, adding the mixed resin liquid B, the leveling agent in the weight ratio and the defoaming agent in the weight ratio, stirring for 10 minutes at a linear speed of 3-5 m/S, and removing mechanical impurities and coarse particles through filtering equipment after stirring uniformly to obtain the single-component silk-screen printing ink for the treatment-free PET material.
The solvent selected in the invention is one or a mixture of two of ketone solvent and ester solvent, and the solvent can better dissolve the components and can adjust the viscosity and the volatilization drying speed of the finally prepared ink.
The raw materials are selected as the components of the single-component silk-screen printing ink, so that the finally prepared product has excellent water resistance, acid resistance and alkali resistance, and excellent temperature resistance, scratch resistance and scratch resistance. Meanwhile, the finally prepared silk-screen printing ink belongs to single-component naturally-dried printing ink for the treatment-free PET material, effectively solves the problem that the existing silk-screen printing ink is poor in adhesive force when applied to the treatment-free PET material, reduces the treatment process of the PET material, optimizes the service time of the printing ink, improves the production efficiency, and can provide more diversified choices in the design of the printing scheme of the PET material.
In step S1, the stirring linear speed is selected to be 7-10 m/S, and stirring is performed for 30-60 minutes to disperse the saturated polyester resin in the solvent to prepare uniform and stable mixed resin liquid a, wherein if the stirring speed is too high, the resin liquid is likely to generate heat in the preparation process, thereby affecting the stability of the mixed resin liquid a; if the stirring speed is too low, the phenomenon of uneven dispersion is easily caused.
In step S2, the organic silicon modified resin is added to the solvent and stirred for 30-60 minutes, so that the organic silicon modified resin is fully dispersed in the solvent to prepare uniform and stable mixed resin liquid B.
In step S3 of the present invention, the dispersant is added to the solvent and fully stirred for 10 minutes to obtain a stable mixed dispersion, which can make the stability of the final product better.
In step S4 of the present invention, the pigment, the filler and the wax powder are added to the mixed dispersion liquid and stirred for 30 minutes, and the pigment and the filler are subjected to surface adsorption treatment, so that the pigment and the filler fully adsorb the dispersion liquid, and the wax powder is fully dispersed in the solvent, thereby performing defoaming and anti-settling effects, and improving the glossiness of the finally prepared ink.
In step S5, the mixed resin liquid A and the slurry are fully stirred for 30 minutes, the molecular chain of the saturated polyester resin, the pigment and the filler are mixed and wound, and the stable pre-dispersed color paste is obtained after full dispersion treatment.
In the step S6, the prepared pre-dispersing color paste is fully ground, so that the particle size in the pre-dispersing color paste is further refined and is more uniform, and the mixed resin liquid B, the leveling agent and the defoaming agent are added, uniformly stirred and filtered to obtain the stable single-component silk-screen printing ink for the treatment-free PET material.
The organic silicon modified resin and the saturated polyester resin are selected as main raw materials of the silk-screen printing ink, so that the hardness and flexibility of ink layers of the silk-screen printing ink can be balanced, and the drying speed of the printing ink is accelerated; the two resins are thermoplastic resins, can be dried through natural volatilization of a solvent, and do not need to add curing agents or catalysts of other components, so that the naturally-dried single-component silk-screen printing ink for the treatment-free PET material with excellent performance can be finally prepared.
Preferably, the one-component silk-screen printing ink for the treatment-free PET material has the advantages that the glass transition temperature of the saturated polyester resin is 5-30 ℃, the hydroxyl value is 2-6 mgKOH/g, the molecular weight is 1000-5000, and the solid content is more than 99.5%.
The hydroxyl value of the saturated polyester resin is controlled to be 2-6 mgKOH/g, the molecular weight is controlled to be 1000-5000, and the saturated polyester resin with low molecular weight is easy to dissolve in ketone ester solvents. When the saturated polyester resin with low molecular weight is mixed with the pigment and the filler, the pigment and the filler are easier to permeate into the resin, and pigment particles and filler particles can be better wrapped and dispersed.
Preferably, the single-component screen printing ink for the treatment-free PET material is prepared by using one of organic silicon modified saturated polyester resin, organic silicon modified polyurethane resin and organic silicon modified acrylic resin.
The resin has strong chemical resistance, such as alcohol resistance, acid resistance, alkali resistance and the like, and has better adhesion and compatibility to PET base materials with the same properties.
Preferably, the one-component silk-screen printing ink for the treatment-free PET material has the glass transition temperature of 50-70 ℃, the hydroxyl value of 5-10 mgKOH/g, the molecular weight of 10000-15000 and the solid content of more than 99.5%.
The hydroxyl value of the organic silicon modified saturated polyester resin is controlled to be 5-10 mgKOH/g, the molecular weight is controlled to be 10000-15000, the organic silicon modified saturated polyester resin with high molecular weight enables the structure of the printing ink to be more compact, the adhesion to a PET material is stronger, and the physical property and the chemical stability of the prepared screen printing ink layer are better.
Preferably, the single-component silk-screen printing ink for the treatment-free PET material is a non-silicone oil defoaming agent.
The defoaming agent is a non-silicon defoaming agent, has excellent defoaming, foam inhibiting and foam breaking effects, and can effectively reduce the surface tension of the silk-screen printing ink, so that the silk-screen printing ink is easy to coat and adsorb.
Preferably, the single-component silk-screen printing ink for the treatment-free PET material is prepared by using fluorocarbon modified polyacrylate high polymer as the leveling agent.
The leveling agent can effectively reduce the viscosity of the printing ink, eliminate shrinkage cavities and enable the surface of the printing ink to be smoother.
Preferably, the dispersant is a high molecular weight block copolymer containing pigment affinity groups.
The dispersing agent can effectively avoid the conditions of sedimentation and flocculation of solid particles in the preparation process, and improve the luster and the tinting strength of the ink.
Preferably, the pigment is an inorganic or organic environmental-friendly pigment without halogen.
The pigment is an inorganic or organic environment-friendly pigment without halogen, and can make the tinting strength of the ink better.
Preferably, the single-component silk-screen printing ink for the treatment-free PET material is prepared from one or a mixture of two of talcum powder and nano calcium carbonate.
The filler can improve the solid content of the printing ink, enhance the physical properties of the silk-screen printing ink and reduce the production cost.
Preferably, the single-component silk-screen printing ink for the treatment-free PET material is prepared from one of polyethylene wax, polytetrafluoroethylene wax and polyamide wax.
The wax powder can provide excellent scratch resistance and wear resistance, so that the ink cannot smear the back or fall off during batch production printing, and the appearance quality of printed products is improved.
Compared with the prior art, the invention has the outstanding beneficial effects that:
1. the ink adopts the saturated polyester resin and the organic silicon modified resin as main raw materials, the two components are tightly combined to be used as a binder of the ink, and the adhesion performance of the ink can be further improved by using the two components in the proportion. The finally prepared single-component silk-screen printing ink has higher practicability, other components such as curing agents or catalysts do not need to be added when the single-component silk-screen printing ink is used, the utilization rate of the single-component silk-screen printing ink is improved, and the defect that the traditional multi-component printing ink needs to be prepared on site when used is overcome. After the silk-screen printing ink prepared by the invention is coated, a stable continuous film can be formed only by natural drying without being heated by an oven, so that the defect that the traditional thermosetting silk-screen printing ink needs to be heated when being cured is overcome, the process time is saved, and the cost is reduced;
2. the finally prepared silk-screen printing ink has excellent water resistance, acid resistance, alkali resistance and scratch resistance, overcomes the defect of poor adhesive force when the existing silk-screen printing ink is printed on a treatment-free PET material, reduces baking equipment, simplifies the process and can obviously improve the printing production efficiency.
Detailed Description
The invention will now be described in further detail with reference to specific embodiments, but they are not intended to limit the invention:
example 1
A single-component silk-screen printing ink for a treatment-free PET material comprises the following components in parts by weight:
20 parts of saturated polyester resin, namely 20 parts of saturated polyester resin,
30 parts of organic silicon modified resin, namely,
60 parts of a solvent, namely, a solvent,
1 part of defoaming agent, namely 1 part,
1 part of a leveling agent, namely 1 part,
5 parts of a dispersing agent, namely,
25 parts of a pigment, namely adding 25 parts of a pigment,
20 parts of a filler, namely, a filler,
1 part of wax powder, namely 1 part of wax powder,
the solvent is one or a mixture of two of ketone solvent and ester solvent, and the preparation method comprises the following steps:
s1, taking 30% of the total weight of the solvent and the saturated polyester resin in the weight ratio, putting the saturated polyester resin into a container, heating the saturated polyester resin to 60 ℃, and stirring the saturated polyester resin for 60 minutes at a linear speed of 10 m/S to disperse the saturated polyester resin in the solvent to obtain mixed resin liquid A with the solid content of 50%;
s2, taking 30% of the total weight of the solvent and the organic silicon modified resin in the weight ratio, putting the organic silicon modified resin into a container, heating to 60 ℃, stirring for 60 minutes at a linear speed of 10 m/S, and dispersing the organic silicon modified resin in the solvent to obtain mixed resin liquid B with the solid content of 50%;
s3, putting the residual solvent and the dispersant in the weight ratio into a container, stirring for 10 minutes at a linear speed of 5 m/S, and dissolving the dispersant in the solvent to obtain a mixed dispersion liquid;
s4, adding the pigment, the filler and the wax powder in the weight ratio into the mixed dispersion liquid, and stirring for 30 minutes at a linear speed of 10 m/S to obtain slurry subjected to dispersion treatment;
s5, mixing the mixed resin liquid A with the slurry, and stirring for 30 minutes at a linear speed of 10 m/S to obtain pre-dispersed color paste;
and S6, transferring the pre-dispersed color paste into a turbine sand mill for grinding, controlling the grinding temperature at 40 ℃, grinding the pre-dispersed color paste into particles with the diameter D90=500nm, adding the mixed resin liquid B, the leveling agent in the weight ratio and the defoaming agent in the weight ratio, stirring for 10 minutes at the linear speed of 5 m/S, and removing mechanical impurities and coarse particles through filtering equipment after stirring uniformly to obtain the single-component silk-screen printing ink for the treatment-free PET material.
Preferably, the saturated polyester resin has a glass transition temperature of 30 ℃, a hydroxyl value of 6mgKOH/g, a molecular weight of 5000 and a solid content of more than 99.5%.
Preferably, the organic silicon modified resin is one of organic silicon modified saturated polyester resin, organic silicon modified polyurethane resin and organic silicon modified acrylic resin.
Preferably, the organosilicon modified saturated polyester resin has a glass transition temperature of 70 ℃, a hydroxyl value of 10mgKOH/g, a molecular weight of 15000 and a solid content of more than 99.5%.
Preferably, the defoaming agent is a non-silicone oil type defoaming agent.
Preferably, the leveling agent is a fluorocarbon modified polyacrylate high polymer.
Preferably, the dispersant is a high molecular weight block copolymer containing pigment affinic groups.
Preferably, the pigment is an inorganic or organic environmental-friendly pigment without halogen.
Preferably, the filler is one or a mixture of two of talcum powder and nano calcium carbonate.
Preferably, the wax powder is one of polyethylene wax, polytetrafluoroethylene wax and polyamide wax.
Example 2
A single-component silk-screen printing ink for a treatment-free PET material comprises the following components in parts by weight:
5 parts of saturated polyester resin, namely 5 parts of saturated polyester resin,
10 parts of organic silicon modified resin, namely 10 parts of organic silicon modified resin,
30 parts of a solvent, namely, a solvent,
0.5 part of defoaming agent, 0.5 part of,
0.5 part of a leveling agent,
2 parts of a dispersing agent, namely 2 parts of,
5 parts of a pigment, namely adding 5 parts of a pigment,
5 parts of a filler, namely adding a filler,
0.5 part of wax powder,
the solvent is one or a mixture of two of ketone solvent and ester solvent, and the preparation method comprises the following steps:
s1, taking 10% of the total weight of the solvent and the saturated polyester resin in the weight ratio, putting the saturated polyester resin into a container, heating the saturated polyester resin to 60 ℃, and stirring the saturated polyester resin for 30 minutes at a linear speed of 7 m/S to disperse the saturated polyester resin in the solvent to obtain mixed resin liquid A with the solid content of 50%;
s2, taking 20% of the total weight of the solvent and the organic silicon modified resin in the weight ratio, putting the organic silicon modified resin into a container, heating to 60 ℃, stirring for 30 minutes at a linear speed of 7 m/S, and dispersing the organic silicon modified resin in the solvent to obtain mixed resin liquid B with the solid content of 50%;
s3, putting the residual solvent and the dispersant in the weight ratio into a container, stirring for 10 minutes at a linear speed of 3 m/S, and dissolving the dispersant in the solvent to obtain a mixed dispersion liquid;
s4, adding the pigment, the filler and the wax powder in the weight ratio into the mixed dispersion liquid, and stirring for 30 minutes at a linear speed of 7 m/S to obtain slurry subjected to dispersion treatment;
s5, mixing the mixed resin liquid A with the slurry, and stirring for 30 minutes at a linear speed of 7 m/S to obtain pre-dispersed color paste;
and S6, transferring the pre-dispersed color paste into a turbine sand mill for grinding, controlling the grinding temperature at 30 ℃, grinding the pre-dispersed color paste into particles with the diameter D90=500nm, adding the mixed resin liquid B, the leveling agent in the weight ratio and the defoaming agent in the weight ratio, stirring for 10 minutes at a linear speed of 3 m/S, and removing mechanical impurities and coarse particles through filtering equipment after stirring uniformly to obtain the single-component silk-screen printing ink for the treatment-free PET material.
Preferably, the saturated polyester resin has a glass transition temperature of 5 ℃, a hydroxyl value of 2mgKOH/g, a molecular weight of 1000, and a solid content of more than 99.5%.
Preferably, the organic silicon modified resin is one of organic silicon modified saturated polyester resin, organic silicon modified polyurethane resin and organic silicon modified acrylic resin.
Preferably, the glass transition temperature of the organic silicon modified saturated polyester resin is 50 ℃, the hydroxyl value is 5mgKOH/g, the molecular weight is 10000, and the solid content is more than 99.5%.
Preferably, the defoaming agent is a non-silicone oil type defoaming agent.
Preferably, the leveling agent is a fluorocarbon modified polyacrylate high polymer.
Preferably, the dispersant is a high molecular weight block copolymer containing pigment affinic groups.
Preferably, the pigment is an inorganic or organic environmental-friendly pigment without halogen.
Preferably, the filler is one or a mixture of two of talcum powder and nano calcium carbonate.
Preferably, the wax powder is one of polyethylene wax, polytetrafluoroethylene wax and polyamide wax.
Example 3
A single-component silk-screen printing ink for a treatment-free PET material comprises the following components in parts by weight:
12.5 parts of saturated polyester resin,
20 parts of organic silicon modified resin, namely 20 parts of organic silicon modified resin,
45 parts of a solvent, namely, a solvent,
0.75 part of defoaming agent, 0.75 part of,
0.75 part of a leveling agent,
3.5 parts of a dispersing agent, namely,
15 parts of a pigment, namely adding 15 parts of a pigment,
12.5 parts of a filler, namely,
0.75 part of wax powder,
the solvent is one or a mixture of two of ketone solvent and ester solvent, and the preparation method comprises the following steps:
s1, taking 20% of the total weight of the solvent and the saturated polyester resin in the weight ratio, putting the saturated polyester resin into a container, heating the saturated polyester resin to 60 ℃, and stirring the saturated polyester resin for 45 minutes at a linear speed of 8.5 m/S to disperse the saturated polyester resin in the solvent to obtain a mixed resin liquid A with the solid content of 50%;
s2, taking 24% of the total weight of the solvent and the organic silicon modified resin in the weight ratio, putting the organic silicon modified resin into a container, heating to 60 ℃, stirring for 45 minutes at a linear speed of 8.5 m/S, and dispersing the organic silicon modified resin in the solvent to obtain mixed resin liquid B with the solid content of 50%;
s3, putting the residual solvent and the dispersant in the weight ratio into a container, stirring for 10 minutes at a linear speed of 4 m/S, and dissolving the dispersant in the solvent to obtain a mixed dispersion liquid;
s4, adding the pigment, the filler and the wax powder in the weight ratio into the mixed dispersion liquid, and stirring for 30 minutes at a linear speed of 8.5 m/S to obtain slurry subjected to dispersion treatment;
s5, mixing the mixed resin liquid A with the slurry, and stirring for 30 minutes at a linear speed of 8.5 m/S to obtain pre-dispersed color paste;
and S6, transferring the pre-dispersed color paste into a turbine sand mill for grinding, controlling the grinding temperature at 35 ℃, grinding the pre-dispersed color paste into particles with the diameter D90=500nm, adding the mixed resin liquid B, the leveling agent in the weight ratio and the defoaming agent in the weight ratio, stirring for 10 minutes at a linear speed of 4 m/S, and removing mechanical impurities and coarse particles through filtering equipment after stirring uniformly to obtain the single-component silk-screen printing ink for the treatment-free PET material.
Preferably, the saturated polyester resin has a glass transition temperature of 17.5 ℃, a hydroxyl value of 4mgKOH/g, a molecular weight of 3000, and a solid content of more than 99.5%.
Preferably, the organic silicon modified resin is one of organic silicon modified saturated polyester resin, organic silicon modified polyurethane resin and organic silicon modified acrylic resin.
Preferably, the glass transition temperature of the organic silicon modified saturated polyester resin is 60 ℃, the hydroxyl value is 7.5mgKOH/g, the molecular weight is 12500, and the solid content is more than 99.5%.
Preferably, the defoaming agent is a non-silicone oil type defoaming agent.
Preferably, the leveling agent is a fluorocarbon modified polyacrylate high polymer.
Preferably, the dispersant is a high molecular weight block copolymer containing pigment affinic groups.
Preferably, the pigment is an inorganic or organic environmental-friendly pigment without halogen.
Preferably, the filler is one or a mixture of two of talcum powder and nano calcium carbonate.
Preferably, the wax powder is one of polyethylene wax, polytetrafluoroethylene wax and polyamide wax.
Example 4
A single-component silk-screen printing ink for a treatment-free PET material comprises the following components in parts by weight:
8 parts of saturated polyester resin, namely 8 parts of saturated polyester resin,
12 parts of organic silicon modified resin, namely 12 parts of organic silicon modified resin,
60 parts of a solvent, namely, a solvent,
0.5 part of defoaming agent, 0.5 part of,
0.5 part of a leveling agent,
3 parts of a dispersing agent, namely 3 parts of,
8 parts of a pigment, namely adding 8 parts of pigment,
7 parts of a filler, namely adding a filler,
1 part of wax powder, namely 1 part of wax powder,
the solvent is one or a mixture of two of ketone solvent and ester solvent, and the preparation method comprises the following steps:
s1, taking 13.3 percent of the total weight of the solvent and the saturated polyester resin in the weight ratio, putting the saturated polyester resin into a container, heating the saturated polyester resin to 60 ℃, and stirring the saturated polyester resin for 45 minutes at a linear speed of 7 m/S to disperse the saturated polyester resin in the solvent to obtain a mixed resin liquid A with the solid content of 50 percent;
s2, taking 20% of the total weight of the solvent and the organic silicon modified resin in the weight ratio, putting the organic silicon modified resin into a container, heating the container to 60 ℃, and stirring the mixture for 60 minutes at a linear speed of 10 m/S to disperse the organic silicon modified resin in the solvent to obtain mixed resin liquid B with the solid content of 50%;
s3, putting the residual solvent and the dispersant in the weight ratio into a container, stirring for 10 minutes at a linear speed of 3 m/S, and dissolving the dispersant in the solvent to obtain a mixed dispersion liquid;
s4, adding the pigment, the filler and the wax powder in the weight ratio into the mixed dispersion liquid, and stirring for 30 minutes at a linear speed of 10 m/S to obtain slurry subjected to dispersion treatment;
s5, mixing the mixed resin liquid A with the slurry, and stirring for 30 minutes at a linear speed of 10 m/S to obtain pre-dispersed color paste;
and S6, transferring the pre-dispersed color paste into a turbine sand mill for grinding, controlling the grinding temperature at 30 ℃, grinding the pre-dispersed color paste into particles with the diameter D90=500nm, adding the mixed resin liquid B, the leveling agent in the weight ratio and the defoaming agent in the weight ratio, stirring for 10 minutes at a linear speed of 3 m/S, and removing mechanical impurities and coarse particles through filtering equipment after stirring uniformly to obtain the single-component silk-screen printing ink for the treatment-free PET material.
Preferably, the saturated polyester resin has a glass transition temperature of 7 ℃, a hydroxyl value of 6mgKOH/g, a molecular weight of 1500 and a solid content of more than 99.5%.
Preferably, the organic silicon modified resin is one of organic silicon modified saturated polyester resin, organic silicon modified polyurethane resin and organic silicon modified acrylic resin.
Preferably, the organosilicon modified saturated polyester resin has a glass transition temperature of 70 ℃, a hydroxyl value of 10mgKOH/g, a molecular weight of 15000 and a solid content of more than 99.5%.
Preferably, the defoaming agent is a non-silicone oil type defoaming agent.
Preferably, the leveling agent is a fluorocarbon modified polyacrylate high polymer.
Preferably, the dispersant is a high molecular weight block copolymer containing pigment affinic groups.
Preferably, the pigment is an inorganic or organic environmental-friendly pigment without halogen.
Preferably, the filler is one or a mixture of two of talcum powder and nano calcium carbonate.
Preferably, the wax powder is one of polyethylene wax, polytetrafluoroethylene wax and polyamide wax.
Example 5
Taking the finally prepared screen printing ink in the 4 embodiments, taking the screen printing ink which is produced by the existing Dongguan Rong color ink coating science and technology company and is of the type PET-501 as a comparative example 1, using a 250-mesh screen plate to screen print the 5 screen printing inks on a 70-silk PET material which is not subjected to any treatment, and testing the adhesive force, the fineness and the hardness of the screen printing ink, wherein the screen printing ink and the comparative example performance parameters obtained in the embodiments of the invention are shown in a table 1:
in summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.
Claims (10)
1. The utility model provides a single component silk screen printing ink for exempting from to handle PET material which characterized in that: comprises the following components in parts by weight:
5-20 parts of saturated polyester resin,
10-30 parts of organic silicon modified resin,
30-60 parts of a solvent,
0.5 to 1 part of defoaming agent,
0.5 to 1 part of a leveling agent,
2-5 parts of a dispersing agent,
5-25 parts of a pigment,
5-20 parts of a filler,
0.5 to 1 part of wax powder,
the solvent is one or a mixture of two of ketone solvent and ester solvent, and the preparation method comprises the following steps:
s1, taking 10-30% of the total weight of the solvent and the saturated polyester resin in the weight ratio, putting the saturated polyester resin into a container, heating the saturated polyester resin to 60 ℃, and stirring the saturated polyester resin for 30-60 minutes at a linear speed of 7-10 m/S to disperse the saturated polyester resin in the solvent to obtain a mixed resin liquid A with a solid content of 50%;
s2, taking 20-30% of the total weight of the solvent and the organic silicon modified resin in the weight ratio, putting the organic silicon modified resin into a container, heating to 60 ℃, and stirring for 30-60 minutes at a linear speed of 7-10 m/S to disperse the organic silicon modified resin in the solvent to obtain a mixed resin liquid B with a solid content of 50%;
s3, putting the residual solvent and the dispersant in the weight ratio into a container, stirring for 10 minutes at a linear speed of 3-5 m/S, and dissolving the dispersant in the solvent to obtain a mixed dispersion liquid;
s4, adding the pigment, the filler and the wax powder in the weight ratio into the mixed dispersion liquid, and stirring for 30 minutes at a linear speed of 7-10 m/S to obtain slurry subjected to dispersion treatment;
s5, mixing the mixed resin liquid A with the slurry, and stirring for 30 minutes at a linear speed of 7-10 m/S to obtain pre-dispersed color paste;
and S6, transferring the pre-dispersed color paste into a turbine sand mill for grinding, controlling the grinding temperature at 30-40 ℃, grinding the pre-dispersed color paste into particles with the diameter D90=500nm, adding the mixed resin liquid B, the leveling agent in the weight ratio and the defoaming agent in the weight ratio, stirring for 10 minutes at a linear speed of 3-5 m/S, and removing mechanical impurities and coarse particles through filtering equipment after stirring uniformly to obtain the single-component silk-screen printing ink for the treatment-free PET material.
2. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the glass transition temperature of the saturated polyester resin is 5-30 ℃, the hydroxyl value is 2-6 mgKOH/g, the molecular weight is 1000-5000, and the solid content is more than 99.5%.
3. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the organic silicon modified resin is one of organic silicon modified saturated polyester resin, organic silicon modified polyurethane resin and organic silicon modified acrylic resin.
4. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the glass transition temperature of the organic silicon modified saturated polyester resin is 50-70 ℃, the hydroxyl value is 5-10 mgKOH/g, the molecular weight is 10000-15000, and the solid content is more than 99.5%.
5. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the defoaming agent is a non-silicone oil defoaming agent.
6. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the leveling agent is fluorocarbon modified polyacrylate high polymer.
7. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the dispersant is a high molecular weight block copolymer containing pigment affinity groups.
8. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the pigment is an inorganic or organic environmental-friendly pigment without halogen.
9. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the filler is one or a mixture of two of talcum powder and nano calcium carbonate.
10. The one-component silk-screen ink for the treatment-free PET material is characterized by comprising the following components in parts by weight: the wax powder is one of polyethylene wax, polytetrafluoroethylene wax and polyamide wax.
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Application publication date: 20200218 |