CN115216982A - Natural dry baking-free process water-based paint digital direct injection method - Google Patents

Natural dry baking-free process water-based paint digital direct injection method Download PDF

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CN115216982A
CN115216982A CN202210977138.1A CN202210977138A CN115216982A CN 115216982 A CN115216982 A CN 115216982A CN 202210977138 A CN202210977138 A CN 202210977138A CN 115216982 A CN115216982 A CN 115216982A
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printing
layer
slurry
aqueous dispersion
adopting
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CN115216982B (en
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喻盛
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/30—Ink jet printing
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    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
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    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/5214—Polymers of unsaturated compounds containing no COOH groups or functional derivatives thereof
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    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention discloses a water-based paint digital direct injection method in a natural dry baking-free process, which comprises the following steps of: (1) Carrying out surface treatment on the area of the fabric to be printed by adopting a low-temperature plasma device to roughen the surface of the area; (2) Adopting the priming slurry to prime the surface of the treated fabric; (3) Printing an anti-sublimation layer on the priming layer by adopting anti-sublimation layer slurry; (4) Printing a white layer on the anti-sublimation layer by adopting white slurry; (5) Printing an ink absorption layer on the white layer by adopting ink absorption layer slurry; (6) Adopting water-based textile coating ink to spray and print patterns on the ink absorption layer; (7) printing a cover layer on the pattern by using cover slurry; and (8) pressing and ironing at 100-120 ℃ for 6-8 seconds. After printing is finished, the digital direct injection method provided by the invention can be used for pressing at low temperature for 6-8 seconds, and after pressing, the printing is naturally dried at room temperature without baking, so that the energy is saved by 60-80%, the baking-free process is adopted, and the processing cost is saved.

Description

Natural dry baking-free process water-based paint digital direct injection method
Technical Field
The invention relates to a digital spraying method, in particular to a digital direct spraying method of a water-based paint in a natural drying baking-free process.
Background
The production process of the digital direct injection printing greatly shortens the production route of the traditional process, does not need plate making, has high printing speed and greatly reduces the proofing cost. The production process of digital printing gets rid of the processes of color separation, production and silk screen production in the production process of the traditional printing, thereby greatly shortening the production time. In addition, the proofing cost is greatly reduced due to the simplification of the process. Under the market competition rule that time is money, efficiency is life, shortening of the proofing period and reduction of the proofing cost undoubtedly bring more market opportunities to enterprises.
However, the current digital direct injection printing needs high-temperature baking at 130-160 ℃, and after high-temperature baking, the fabric shrinks by 3-10%, the size is unstable, the cost of the fabric is increased, and part of chemical fiber fabrics are wrinkled and deformed, so that the fabric cannot be accepted. Such as the digital method of somebody in the united states: spraying treating fluid on the surface of the fabric, and heating; digital direct injection; baking at 155-160 deg.c for 5-12 min. The disadvantages are as follows: the adaptability to fabrics is poor, the fabric is limited to the all-cotton plain weave application, and other fabrics containing chemical fibers are cracked and fall off after being washed for 3 times by washing water according to the national standard 4N after being printed, and do not reach the standard; the baking time is as long as 5-12 minutes, and part of the chemical fiber fabric is seriously deformed and shrinks by 3-10%. In addition, high-temperature baking is adopted, the total energy consumption and labor cost of each cut piece is about RMB 0.3-0.5 yuan, and the cost is high.
Disclosure of Invention
The invention provides a digital direct injection method of water-based paint in a natural dry baking-free process.
The technical scheme provided by the invention is as follows: a water-based paint digital direct injection method for a natural dry baking-free process comprises the following steps:
(1) Surface treatment: carrying out surface treatment on the area of the fabric to be printed by adopting a low-temperature plasma device to roughen the surface of the area;
(2) Printing a bottom layer: adopting the priming slurry to prime the surface of the treated fabric;
(3) Printing an anti-sublimation layer: printing an anti-sublimation layer on the priming layer by adopting anti-sublimation layer slurry;
(4) Printing a white layer: printing a white layer on the anti-sublimation layer by adopting white slurry;
(5) Printing an ink absorption layer: printing an ink absorption layer on the white layer by adopting ink absorption layer slurry;
(6) Digital direct injection spray painting: adopting water-based textile coating ink to spray and paint patterns on the ink absorption layer;
(7) Printing a cover surface layer: printing a cover layer on the pattern by using cover paste;
(8) And (3) low-temperature pressing: pressing at 100-120 deg.C for 6-8 s.
In the step (1), if the surface energy of the fabric is less than 50 dynes, low-temperature plasma treatment is needed, and if the surface energy of the fabric is more than 50 dynes, low-temperature plasma treatment is not needed.
In the step (2), the bottom slurry is printed for 1-2 times by using a 120-150-mesh screen plate, and after one printing, the surface is dried by hot air at the temperature of 60-80 ℃ and the air volume of 500-1000M3/Hr.
The formula of the primer slurry comprises: 100 g of silicon modified polyurethane aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier and 1-3 g of nonionic thickener; 0.5-1 g of anion organic silicon surfactant, 0.1-0.5 g of non-ionic fluorocarbon surfactant and 3-8 g of aziridine crosslinking agent.
In the step (3), the anti-sublimation sizing agent is printed for 2-3 times by a 100-135 mesh screen printing plate, and after each printing, the surface is dried by hot air at 60-80 ℃ and the air volume is 500-1000M3/Hr.
The formula of the anti-sublimation slurry comprises: 100 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of non-ionic emulsifier, 1-2 g of non-ionic thickening agent, 8-10 g of activated carbon powder, 1-3 g of silver ion antibacterial powder and 0.1-0.3 g of aziridine crosslinking agent.
In the step (4), the white slurry is printed for 2-3 times by using a 120-150 mesh screen plate, and after each printing, the surface is dried by hot air at the temperature of 60-80 ℃ and the air volume of 500-1000M3/Hr.
The formula of the white slurry comprises: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 20-30 g of titanium dioxide and 0.1-0.3 g of aziridine crosslinking agent.
In the step (5), the ink absorption slurry is printed for 1-2 times by using a 120-150-mesh screen plate, after the first time of printing, the surface is dried by hot air at the temperature of 60-80 ℃, the air volume is 500-1000M3/Hr, and after the second time of printing, the surface does not need to be dried.
The formula of the ink-absorbing slurry comprises the following components: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 5-10 g of titanium dioxide, 4-6 g of hydrophilic nano silicon dioxide powder, 5-8 g of ethylene-vinyl acetate copolymer aqueous dispersion emulsion, 4-6 g of ethylene-acrylic acid copolymer aqueous dispersion emulsion, 4-6 g of polyvinyl alcohol aqueous dispersion emulsion and 0.5-1 g of aziridine crosslinking agent.
In the step (7), the slurry is printed for 1-2 times by using a 120-150 screen printing plate, and after each printing, the surface is dried by hot air at the temperature of 60-80 ℃ with the air volume of 500-1000M3/Hr.
The formula of the cover layer slurry comprises the following components: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 5-8 g of organosilicon synthetic wax polymerization anti-sticking emulsion and 0.5-1 g of aziridine crosslinking agent.
The technical effects are as follows:
(1) The low-temperature plasma device is used for treating the surface of the fabric, so that the surface roughness is promoted, the contact area is increased, the surface hydrophilic groups are increased, and the hydrophilicity is increased.
(2) In the formula of the primer slurry, 2 surfactants and water-soluble organic solvent diethylene glycol are selected to promote the resin and the surface material to form affinity groups.
(3) The sizing agent of each layer of the invention, except the anti-sublimation sizing agent, uses self-crosslinking silicon modified polyurethane aqueous dispersion, and is supplemented with water-soluble aziridine crosslinking agent, and can self-crosslink under natural conditions without high temperature to form a structure compact affinity group.
(4) The invention uses hydrophilic nano-scale silicon dioxide as an ink absorber and low-melting point (lower than 130 ℃) thermoplastic resin as an auxiliary material, the pH value of the slurry is close to neutral, the resin system and the white layer and the transparent layer can be naturally fused, and high temperature and long-time heating are not needed.
The ink absorbing slurry is added with ethylene-vinyl acetate copolymer aqueous dispersion, ethylene-acrylic acid copolymer aqueous dispersion emulsion and polyvinyl alcohol aqueous dispersion emulsion, can be melted at 100-120 ℃, pressed at 120 ℃ to form liquid, is fused with water-based textile coating ink, and forms a solid embedded structure after being cooled, so that the fastness of a washing water resistance test and a tearing resistance test is achieved.
Hydrophilic nano silicon dioxide is used as an ink absorbent, an aziridine crosslinking agent with the pH value of 8-9 can be added into ink absorption layer slurry at the pH value of 7-7.5, the aziridine crosslinking agent can react with carboxyl at room temperature, and the curing agent can be cured at room temperature after 1% of the solid content of acrylic acid or polyurethane is added. The coating crosslinked by the aziridine crosslinking agent can obviously improve the water resistance, chemical resistance, dry and wet friction resistance, surface anti-sticking property and coating fastness of the coating. In the prior art, acidic alumina solution is mostly adopted to adjust ink absorption layer slurry, aziridine crosslinking agent with the pH value of 8-9 cannot be added at the pH value of 4-4.5, the ink absorption layer slurry cannot be cured at room temperature, and the ink absorption layer slurry can be cured only by high-temperature baking.
(5) After printing is finished, the digital direct injection method provided by the invention can be used for pressing at low temperature for 6-8 seconds, and after pressing, the printing is naturally dried at room temperature without baking, so that the energy is saved by 60-80%, and the development requirement is met.
(6) The digital direct injection method provided by the invention can synchronously finish pressing in an automatic assembly line machine, thereby avoiding the baking process, saving 2 persons and saving the cost by 0.2-0.3 yuan/piece.
(7) The digital direct injection method provided by the invention can be applied to deep-color chemical fibers, particularly down jacket fabrics, does not need high temperature to influence the shrinkage and deformation of the fabrics, and fills the gap in the market.
(8) The digital direct injection method provided by the invention does not use a strongly irritant organic solvent, the production environment is clean and environment-friendly, and the discharge standard of VOC is reached.
Detailed Description
Examples
(1) Surface treatment: and (3) carrying out surface treatment on the area of the fabric to be printed by adopting a low-temperature plasma device to roughen the surface of the fabric. The fabric surface energy is less than 50 dyne, and low-temperature plasma treatment is needed, and the fabric surface energy is more than 50 dyne, and low-temperature plasma treatment is not needed.
(2) Printing a bottom layer: and (4) adopting the priming slurry to prime the surface of the treated fabric.
And printing the bottom paste 1-2 times by using a 120-150-mesh screen plate, and after printing once, drying the surface by using hot air at the temperature of 60-80 ℃ and with the air volume of 500-1000M3/Hr.
The formula of the primer slurry comprises: 100 g of silicon modified polyurethane aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier and 1-3 g of nonionic thickener; 0.5-1 g of organic silicon surfactant, 0.1-0.5 g of non-ionic fluorocarbon surfactant and 3-8 g of aziridine crosslinking agent.
(3) Printing an anti-sublimation layer: and printing the anti-sublimation layer on the priming layer by adopting the anti-sublimation layer slurry.
Printing the anti-sublimation sizing agent for 2-3 times by using a 100-135 mesh screen plate, and after printing once, carrying out hot air drying on the surface at 60-80 ℃ and with the air volume of 500-1000M3/Hr.
The formula of the anti-sublimation slurry comprises the following components: 100 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of non-ionic emulsifier, 1-2 g of non-ionic thickening agent, 8-10 g of activated carbon powder, 1-3 g of silver ion antibacterial powder and 0.1-0.3 g of aziridine crosslinking agent.
(4) Printing a white layer: and printing a white layer on the anti-sublimation layer by using white slurry.
And (3) printing the white slurry 2-3 times by using a 120-150-mesh screen plate, and drying the surface by hot air at the temperature of 60-80 ℃ and the air volume of 500-1000M3/Hr after printing once.
The formula of the white slurry comprises: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 20-30 g of titanium dioxide and 0.1-0.3 g of aziridine crosslinking agent.
(5) Printing an ink absorption layer: and printing an ink absorption layer on the white layer by adopting ink absorption layer slurry.
Printing ink absorption slurry for 1-2 times by using a 120-150 mesh screen plate, drying the surface by hot air at the temperature of 60-80 ℃ after the first time of printing, wherein the air volume is 500-1000M3/Hr, and drying the surface after the second time of printing is not needed.
The ink-absorbing slurry formula comprises: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 5-10 g of titanium dioxide, 4-6 g of hydrophilic nano silicon dioxide powder, 5-8 g of ethylene-vinyl acetate copolymer aqueous dispersion emulsion, 4-6 g of ethylene-acrylic acid copolymer aqueous dispersion emulsion, 4-6 g of polyvinyl alcohol aqueous dispersion emulsion and 0.5-1 g of aziridine crosslinking agent.
(6) Digital direct injection spray painting: and (3) adopting water-based textile coating ink to spray and paint patterns on the ink absorption layer.
(7) Printing a cover surface layer: the coverstock was printed over the pattern using a coverstock slurry.
And (3) printing the cover paste for 1-2 times by using a 120-150 screen printing plate, and drying the surface by hot air at the temperature of 60-80 ℃ after printing once, wherein the air volume is 500-1000M3/Hr.
The formula of the cover surface layer slurry comprises the following components: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 5-8 g of organosilicon synthetic wax polymerization anti-sticking emulsion and 0.5-1 g of aziridine crosslinking agent.
(8) And (3) low-temperature pressing: pressing at 100-120 deg.c for 6-8 sec.
In the above examples, non-ionic emulsifiers: dongguan City of Shang Dynasty RX-218. Nonionic thickener: dongguan City Rong Xian Huai RX-619 thickening agent. Anionic silicone surfactant: silok-8141, a high molecular Polymer Co., srocco, guangzhou. Non-ionic fluorocarbon surfactant: guangzhou Hui New Material Ltd FS-8500.
The above detailed description is directed to an example of the present invention, which is not intended to limit the scope of the invention, but is intended to include all equivalent implementations or modifications without departing from the spirit and scope of the present invention.

Claims (10)

1. A water-based paint digital direct injection method for a natural dry baking-free process is characterized by comprising the following steps:
(1) Surface treatment: carrying out surface treatment on the area of the fabric to be printed by adopting a low-temperature plasma device to roughen the surface of the area;
(2) Printing a bottom layer: adopting the priming slurry to prime the surface of the treated fabric;
(3) Printing an anti-sublimation layer: printing an anti-sublimation layer on the priming layer by adopting anti-sublimation layer slurry;
(4) Printing a white layer: printing a white layer on the anti-sublimation layer by adopting white slurry;
(5) Printing an ink absorption layer: printing an ink absorption layer on the white layer by adopting ink absorption layer slurry;
(6) Digital direct injection spray painting: adopting water-based textile coating ink to spray and print patterns on the ink absorption layer;
(7) Printing a cover surface layer: printing a cover layer on the pattern by using cover paste;
(8) And (3) low-temperature pressing: pressing at 100-120 deg.c for 6-8 sec.
2. The digital direct injection method of water-based paint in natural dry no-bake process according to claim 1, wherein in step (5), the ink-absorbing slurry is printed for 1-2 times by a 120-150 mesh screen, and after the first printing, the surface is dried by hot air at 60-80 ℃ with an air flow of 500-1000M3/Hr.
3. The digital direct injection method of water-based paint in natural dry no-bake process according to claim 2, wherein the ink-absorbing slurry formulation comprises: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 5-10 g of titanium dioxide, 4-6 g of hydrophilic nano silicon dioxide powder, 5-8 g of ethylene-vinyl acetate copolymer aqueous dispersion emulsion, 4-6 g of ethylene-acrylic acid copolymer aqueous dispersion emulsion, 4-6 g of polyvinyl alcohol aqueous dispersion emulsion and 0.5-1 g of aziridine crosslinking agent.
4. The method according to claim 1, wherein in step (1), the fabric surface energy is less than 50 dynes, and the low temperature plasma treatment is required.
5. The digital direct injection method of water-based paint in natural dry baking-free process according to claim 1, wherein in the step (2), the priming paste is printed for 1-2 times by a 120-150 mesh screen printing, and after each printing, the surface is dried by hot air at 60-80 ℃ and with 500-1000M3/Hr air volume; the formula of the primer slurry comprises: 100 g of silicon modified polyurethane aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier and 1-3 g of nonionic thickener; 0.5-1 g of anionic organic silicon surfactant, 0.1-0.5 g of non-ionic fluorocarbon surfactant and 3-8 g of aziridine crosslinking agent.
6. The digital direct injection method of water-based paint in natural dry no-bake process according to claim 1, wherein in step (3), the anti-sublimation paste is printed for 2-3 times by a 100-135 mesh screen printing plate, and after each printing, the surface is dried by hot air at 60-80 ℃ and with 500-1000M3/Hr of air volume
The formula of the anti-sublimation slurry comprises: 100 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 8-10 g of activated carbon powder, 1-3 g of silver ion antibacterial powder and 0.1-0.3 g of aziridine crosslinking agent.
7. The digital direct injection method of water-based paint in natural dry no-bake process according to claim 1, wherein in step (4), the white slurry is printed with 120-150 mesh screen for 2-3 times, and after each printing, the surface is dried with hot air at 60-80 ℃ and 500-1000M3/Hr of air volume.
8. The method according to claim 7, wherein the white slurry formulation is selected from the group consisting of: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 20-30 g of titanium dioxide and 0.1-0.3 g of aziridine crosslinking agent.
9. The digital direct injection method of water-based paint in natural dry no-bake process according to claim 7, wherein in step (7), the surface paste is printed 1-2 times by using 120-150 mesh screen, and after each printing, the surface is dried by hot air at 60-80 ℃ with an air flow rate of 500-1000M3/Hr.
10. The method according to claim 9, wherein the formulation of the cover coat slurry is as follows: 30 g of silicon modified polyurethane aqueous dispersion, 70 g of acrylic acid aqueous dispersion, 5-8 g of polyethylene glycol, 5-8 g of diethylene glycol, 1-2 g of nonionic emulsifier, 1-2 g of nonionic thickener, 5-8 g of organosilicon synthetic wax polymerization anti-sticking emulsion and 0.5-1 g of aziridine crosslinking agent.
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