CN116162382B - Separable ink-absorbing coating for digital printing of clothing label - Google Patents

Separable ink-absorbing coating for digital printing of clothing label Download PDF

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Publication number
CN116162382B
CN116162382B CN202211704645.4A CN202211704645A CN116162382B CN 116162382 B CN116162382 B CN 116162382B CN 202211704645 A CN202211704645 A CN 202211704645A CN 116162382 B CN116162382 B CN 116162382B
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coating
mass
ink
powder
reaction
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CN116162382A (en
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肖振华
陈启智
肖海根
陈启慧
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Jian Tiancheng New Material Co ltd
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Jian Tiancheng New Material Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0023—Digital printing methods characterised by the inks used
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
    • C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
    • C08G65/3311—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing a hydroxy group
    • C08G65/3318—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing a hydroxy group heterocyclic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates

Abstract

The invention discloses a detachable ink-absorbing coating for digital printing of clothing labels, which comprises the following raw materials in parts by mass: 2-18 parts of composite release agent, 0.2-1 part of dispersing agent, 0.1-1 part of wetting agent, 0.1-1 part of glycol, 0.1-1 part of matte powder, 0.1-1 part of thickening agent, 0.1-0.8 part of sodium chloride or calcium chloride, 50-60 parts of water, and 1-15 parts of fluorocarbon emulsion or acrylic emulsion or the combination of two emulsions, wherein the composite release agent comprises the following components in percentage by mass: (1-1.25) aluminum stearate and barium sulfate. The detachable ink-absorbing coating for digital printing of the clothing label can break through the distance limitation in the clothing label manufacturing process and has the effects of releasing and absorbing ink.

Description

Separable ink-absorbing coating for digital printing of clothing label
Technical Field
The invention belongs to the technical field of clothing printing, and particularly relates to a detachable ink-absorbing coating for digital printing of clothing labels.
Background
The digital printing is to input the pattern into a computer in a digital form, edit the pattern by a computer printing color separation and tracing system (CAD), and then directly spray special dye liquor to textiles by a micro-piezoelectric ink jet nozzle controlled by the computer to form the required pattern. The digital printing technology is a high and new technology product which integrates mechanical and electronic information technologies into a whole and is gradually formed along with the continuous development of computer technology.
Digital printing is divided into digital direct spray printing and digital thermal transfer printing. Digital direct jet printing means that the desired pattern is printed directly on various materials by a digital printer. Digital thermal transfer printing requires printing patterns on special paper in advance, and then transferring the printed patterns to various materials by a thermal transfer printing mode, such as: t-shirts, underwear, sportswear, and the like.
Most of the existing clothing labels adopt a direct spray printing mode, so that the distance between a consignor and a digital printing unit is limited, long-distance cooperation is inconvenient, and the process is complicated. The digital thermal transfer printing manufacturing process breaks through the distance limitation between the trusted party and the digital printing enterprise. At present, the thermal transfer ink-absorbing coating and the release coating for the clothing label are difficult to be simultaneously released and absorbed, the combination coating is required to be formed by separate coating, the process is complex, and the compatibility between the coatings is difficult to control.
In summary, how to design a detachable ink-absorbing coating for digital printing of a clothing label not only can break through the distance limitation in the clothing label manufacturing process, but also has the effects of releasing and absorbing ink, which is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a detachable ink-absorbing coating for digital printing of clothing labels, wherein the detachable ink-absorbing coating can be simultaneously realized through a composite release agent and sodium chloride, meanwhile, the invention also carries out special treatment on the raw materials of the composite release agent, thereby enhancing the release effect, and the sodium chloride is directly added into the coating, so that the invention also adds a specific nonionic dispersing agent to reduce the influence of strong electrolyte sodium chloride.
The invention realizes the above purpose through the following technical scheme:
the detachable ink-absorbing coating for digital printing of the clothing label comprises the following raw materials in parts by mass: 2-18 parts of composite release agent, 0.2-1 part of dispersing agent, 0.1-1 part of wetting agent, 0.1-1 part of glycol, 0.1-1 part of matte powder, 0.1-1 part of thickening agent, 0.1-0.8 part of sodium chloride or calcium chloride, 50-60 parts of water, and 1-15 parts of fluorocarbon emulsion or acrylic emulsion or the combination of two emulsions, wherein the composite release agent comprises the following components in percentage by mass: (1-1.25) aluminum stearate and barium sulfate.
The wetting agent is polyoxyethylene alkylphenol ether or polyoxyethylene fatty alcohol ether, the matte powder is silica matte powder, and the thickening agent is cellulose ethers, specifically carboxymethyl cellulose, hydroxyethyl cellulose or hydroxypropyl methyl cellulose. The solid content of the fluorocarbon emulsion and the acrylic emulsion is 40-50%.
The preparation process of the detachable ink-absorbing coating comprises the following steps:
uniformly mixing aluminum stearate, barium sulfate, a dispersing agent, a wetting agent, matte powder, a thickening agent, sodium chloride or calcium chloride to obtain a mixture, uniformly mixing ethylene glycol, water, fluorocarbon emulsion or acrylic emulsion, then adding the mixture, and fully and uniformly stirring to obtain the release ink-absorbing coating.
Further, the barium sulfate is used after being coated, and the specific steps are as follows: drying barium sulfate, spraying the mixture of molten polyethylene wax and pumice powder onto the surface of the dried barium sulfate, and cooling at normal temperature.
Further, the mass ratio of the barium sulfate to the polyethylene wax to the pumice powder is 1: (0.06-0.2): (0.03-0.1), wherein the melting point of the polyethylene wax is 95-100 ℃, and the particle size of the pumice powder is 0.1-0.3 mm.
The invention also provides a dispersant in the detachable ink-absorbing coating, and the preparation method comprises the following steps:
s1, carrying out esterification reaction on 10-undecen-1-ol and gluconic acid under the condition of a catalyst, wherein the reaction temperature is 100-110 ℃, and the reaction time is 3-6 hours, so as to obtain an esterification product;
s2, uniformly mixing acrylic acid and potassium hydroxide in a reaction kettle, introducing propylene oxide after vacuum dehydration, and cooling after the reaction is finished at the reaction temperature of 170-190 ℃ and the pressure of 0.2-0.3 MPa to obtain polyoxyethylene acrylate;
and S3, carrying out polyaddition reaction on the esterified product obtained in the step S1 and the polyoxyethylene acrylate obtained in the step S2 under the condition of an initiator, wherein the reaction temperature is 70-80 ℃, and the reaction time is 3-4 h, thus obtaining the dispersing agent.
Further, the molar ratio of 10-undecen-1-ol, gluconic acid, acrylic acid and propylene oxide is 1: (1.1-1.2): (1-2): (10-30).
Further, in the step S1, the catalyst is concentrated sulfuric acid, and the addition amount of the catalyst is 1-3% of the total mass of the reaction raw materials.
In the step S2, the adding amount of potassium hydroxide is 1-4% of the molar mass of the acrylic acid, and the reaction time is 6-8 h.
In the step S3, the initiator is ammonium persulfate/sodium bisulfite, benzoyl peroxide// N, N-diethylaniline or tertiary butyl hydroperoxide/sodium metabisulfite, and the addition amount of the initiator is 0.2-0.6% of the total mass of the reaction raw materials.
The invention also provides a method for preprocessing the pumice powder in the detachable ink-absorbing coating, wherein the pumice powder is preprocessed and then used, and the specific method comprises the following steps:
immersing pumice powder in an anionic surfactant aqueous solution for 10-30 min, centrifuging to remove water and drying; soaking the porous nano powder in a cationic surfactant aqueous solution for 20-40 min, centrifuging to remove water and drying; dispersing the soaked pumice powder and the porous nano powder in a dispersing machine (1000-2000 r/min) for 1-2 h to finish pretreatment.
Further, the anionic surfactant aqueous solution is a fatty acid salt aqueous solution with the mass concentration of 3-5%, the adding amount of the anionic surfactant aqueous solution is 3-6 times of the mass of the pumice powder, the cationic surfactant aqueous solution is a quaternary ammonium salt aqueous solution with the mass concentration of 2-4%, the adding amount of the cationic surfactant aqueous solution is 3-5 times of the mass of the porous nano powder, and the porous nano powder is porous nano ceramic powder.
Further, the curing conditions of the detachable ink-absorbing coating are as follows: coating a layer of wet slurry on the PET film, wherein the coating thickness is 5g/m based on the mass of the dry slurry 2 The coating speed is 40m/3 min-5 min (namely, the total duration is 3-5 min for a coating drying line is 40 m), and the temperature is set as follows: baking at 80-95 deg.C for 10-20 s, baking at 110-120 deg.C for 60-100 s, baking at 130-140 deg.C for 40-60 s, baking at 115-125 deg.C for 20-50 s, and baking at 90-100 deg.C for 50-70 s.
The invention also provides an application of the detachable ink-absorbing coating on digital printing of clothing labels, and the application process conditions of the detachable ink-absorbing coating are as follows: the temperature is 150-165 ℃, the pressure is 4 kg, and the ironing machine is used for ironing for 10-15 seconds.
Coating the detachable ink-absorbing coating on a carrier film (optional PET film), curing and forming, then printing a required pattern by digital ink-jet printing, spreading hot melt adhesive powder after the printed film is dried, drying thoroughly, and finally pressing the printed pattern on a clothing product, wherein the pressing treatment process parameters are as follows: preferably at 160℃and a pressure of 4 kg, preferably 10 seconds. And removing the carrier film from the garment product after the ironing treatment, and thus completing the manufacture of the garment label.
The invention has the beneficial effects that:
(1) From taking type effect: the barium sulfate is powdery in the coating and sinks onto the bottom carrier, the melting point of the aluminum stearate is lower than the pressing temperature, and when the cured coating is at the pressing temperature of 150-165 ℃, the aluminum stearate is melted and then forms a film, so that the coating is separated from the carrier, and the product can be released.
(2) Ink absorption function: the coating contains sodium chloride, and has the function of absorbing water and ink, and the ink absorption amount per square is 10-80 g. In the prior art, the printing carrier is pretreated by sodium chloride to achieve the purpose of ink absorption, and the ink absorption effect is lower than that of directly adding sodium chloride into the coating.
(3) The compatibility of the resin emulsion and sodium chloride selected by the invention is superior to that of other resins such as polyurethane, and the like, so that the ink absorbing effect and the coating performance can be improved, and the emulsion has the film forming and color developing effects.
(4) According to the invention, after the barium sulfate is coated with the surface polyethylene wax, the barium sulfate can be uniformly dispersed before the coating is solidified, and the polyethylene wax is melted during heating and solidification to enable the lower layer of the barium sulfate, so that the release effect of the barium sulfate is realized, and meanwhile, the uniformity of the barium sulfate can be ensured.
(5) According to the invention, pumice powder is also added when the surface of the barium sulfate is coated, so that the overall weight is reduced, and the barium sulfate is favorably dispersed in the emulsion.
(6) Because the coating of the invention adopts sodium chloride as a strong electrolyte, the system stability can be influenced in the coating, and the invention adopts a nonionic dispersant which consists of a lipophilic hydrocarbon main chain, hydrophilic gluconic acid branched chains and polyoxyethylene acrylate branched chains, can obviously improve the dispersing capability of the dispersant, has stable performance and is less influenced by the sodium chloride.
(7) The dispersibility of aluminum stearate in the coating is improved after the nonionic dispersant is added, but the pumice stone for the barium sulfate coating treatment is easily separated from the molten polyethylene wax when the coating is solidified and floats on the surface of the coating, so that the release effect of the aluminum stearate is affected. Therefore, the invention also pretreats the pumice powder and then mixes and fills the pumice powder with the porous nano powder, and the filled pumice powder can initially absorb moisture after the coating begins to solidify the polyethylene wax and is melted, so that the pumice powder can increase weight and cannot float on the surface, and the influence on the stearic acid release effect is avoided.
(8) In order to promote the filling of the porous nano powder to the pumice powder, the invention also carries out surface anion treatment on the pumice powder, carries out surface cation treatment on the porous nano powder, and enhances the adsorption of the two.
(9) When the detachable ink-absorbing coating is dried and cured, the heating and cooling sections in different stages are adopted, the heating section can volatilize free water in the drying coating and volatilize moisture absorbed by pumice powder and porous nano powder in the drying coating in sequence, the purpose of full curing is achieved, and the subsequent cooling section can further improve the curing effect.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a detachable ink-absorbing coating for digital printing of clothing labels, which comprises the following raw materials in parts by mass: 10 parts of composite release agent, 0.5 part of dispersing agent, 0.6 part of wetting agent (polyoxyethylene alkylphenol ether), 0.5 part of glycol, 0.5 part of silicon dioxide matte powder, 0.6 part of thickening agent (carboxymethyl cellulose), 0.4 part of sodium chloride, 55 parts of water and 8 parts of fluorocarbon emulsion, wherein the composite release agent comprises the following components in percentage by mass: 1.12 aluminum stearate and barium sulfate.
The preparation process of the detachable ink-absorbing coating comprises the following steps:
uniformly mixing aluminum stearate, barium sulfate, a dispersing agent, a wetting agent, matte powder, a thickening agent and sodium chloride to obtain a mixture, uniformly mixing ethylene glycol, water, fluorocarbon emulsion or acrylic emulsion, then adding the mixture, and fully and uniformly stirring to obtain the release type ink-absorbing coating.
Coating the detachable ink-absorbing coating on a carrier film (optional PET film) for curing (drying at 120 ℃ until the coating is completely cured) to form, then printing a required pattern by digital ink-jet printing, and then pressing the printed film on a clothing product, wherein the pressing treatment process parameters are as follows: the temperature is 160 ℃, the pressure is 4 kg, and the ironing machine is used for ironing for 10 seconds. And removing the carrier film from the garment product after the ironing treatment, and thus completing the manufacture of the garment label.
Example 2
The embodiment provides a detachable ink-absorbing coating for digital printing of clothing labels, wherein barium sulfate is used after being coated, and the specific steps are as follows: drying barium sulfate, spraying the mixture of molten polyethylene wax and pumice powder onto the surface of the dried barium sulfate, and cooling at normal temperature.
The mass ratio of the barium sulfate to the polyethylene wax to the pumice powder is 1:0.12:0.06, the melting point of the polyethylene wax is 95 ℃, and the particle size of the pumice powder is 0.1mm.
The remainder was the same as in example 1.
Example 3
On the basis of the embodiment 2, the embodiment also provides a dispersing agent in the detachable ink-absorbing coating, and the preparation method comprises the following steps:
s1, carrying out esterification reaction on 10-undecen-1-ol and gluconic acid under the condition of a concentrated sulfuric acid catalyst (the addition amount is 2% of the total mass of the reaction raw materials), wherein the reaction temperature is 105 ℃, and the reaction time is 3-4.5 h, so as to obtain an esterification product;
s2, uniformly mixing acrylic acid and potassium hydroxide (the addition amount is 2.5% of the molar mass of the acrylic acid) in a reaction kettle, introducing propylene oxide after vacuum dehydration, and cooling after the reaction is completed at the reaction temperature of 180 ℃ under the pressure of 0.25MPa for 7 hours to obtain polyoxyethylene acrylate;
and S3, carrying out polyaddition reaction on the esterified product obtained in the step S1 and polyoxyethylene acrylic ester obtained in the step S2 under the condition that an initiator (ammonium persulfate/sodium bisulphite, the addition amount of which is 0.4% of the total mass of the reaction raw materials), wherein the reaction temperature is 75 ℃, and the reaction time is 3.5h, so as to obtain the dispersing agent.
Wherein, the mol ratio of the 10-undecen-1-ol, the gluconic acid, the acrylic acid and the propylene oxide is 1:1.15:1.5:20.
the remainder was the same as in example 2.
Example 4
On the basis of the embodiment 3, the embodiment also provides a method for preprocessing the pumice powder in the detachable ink-absorbing coating, wherein the pumice powder is preprocessed and then used, and the specific method comprises the following steps:
immersing pumice powder in a fatty acid salt aqueous solution with the mass concentration of 4% (the addition amount of the fatty acid salt aqueous solution is 4.5 times of the mass of the pumice powder) for 20min, centrifuging to remove water and drying; soaking porous nanometer powder (porous nanometer ceramic powder) in quaternary ammonium salt water solution with mass concentration of 3% (the addition amount is 4 times of the mass of the porous nanometer powder) for 30min, centrifuging to remove water, and oven drying; dispersing the soaked pumice powder and the porous nano powder in a dispersing machine (1000 r/min) for 1.5h to finish pretreatment.
The curing conditions of the detachable ink-absorbing coating are as follows: coating a layer of wet slurry on the PET film, wherein the coating thickness is 5g/m based on the mass of the dry slurry 2 The coating speed was 40m/3min (i.e. 40 meters of coating oven line, total duration 3 min), and the temperature was set to: baking at 95 deg.C 10s, 60s at 120 ℃, 40s at 140 ℃, 20s at 125 ℃ and 50s at 100 ℃.
The remainder was the same as in example 3.
Example 5
The embodiment provides a detachable ink-absorbing coating for digital printing of clothing labels, which comprises the following raw materials in parts by mass: 2 parts of composite release agent, 0.2 part of dispersing agent, 0.1 part of wetting agent (polyoxyethylene fatty alcohol ether), 0.1 part of glycol, 0.1 part of silicon dioxide matte powder, 0.1 part of thickening agent (carboxymethyl cellulose, hydroxyethyl cellulose or hydroxypropyl methyl cellulose), 0.1 part of calcium chloride, 50 parts of water and 1 part of acrylic emulsion, wherein the composite release agent comprises the following components in percentage by mass: 1, aluminum stearate and barium sulfate.
The application process conditions of the detachable ink-absorbing coating on the digital printing of the clothing label are as follows: the temperature is 150 ℃, the pressure is 4 kg, and the ironing machine is 12 seconds.
The barium sulfate is used after being coated, and the specific steps are as follows: drying barium sulfate, spraying the mixture of molten polyethylene wax and pumice powder onto the surface of the dried barium sulfate, and cooling at normal temperature.
The mass ratio of the barium sulfate to the polyethylene wax to the pumice powder is 1:0.06:0.03, wherein the melting point of the polyethylene wax is 95 ℃, and the particle size of the pumice powder is 0.3mm.
The embodiment also provides a dispersing agent in the detachable ink-absorbing coating, and the preparation method comprises the following steps:
s1, carrying out esterification reaction on 10-undecen-1-ol and gluconic acid under the condition of a concentrated sulfuric acid catalyst (the addition amount is 1% of the total mass of the reaction raw materials), wherein the reaction temperature is 100 ℃, and the reaction time is 6 hours, so as to obtain an esterification product;
s2, uniformly mixing acrylic acid and potassium hydroxide (the addition amount is 1% of the molar mass of the acrylic acid) in a reaction kettle, vacuum dehydrating, introducing propylene oxide, reacting at 170 ℃ under the pressure of 0.2MPa for 8 hours, and cooling after the reaction to obtain polyoxyethylene acrylate;
and S3, carrying out polyaddition reaction on the esterified product obtained in the step S1 and polyoxyethylene acrylic ester obtained in the step S2 under the condition that an initiator (benzoyl peroxide// N, N-diethylaniline is added in an amount of 0.2% of the total mass of the reaction raw materials), wherein the reaction temperature is 70 ℃, and the reaction time is 3 hours, thus obtaining the dispersing agent.
Wherein, the mol ratio of the 10-undecen-1-ol, the gluconic acid, the acrylic acid and the propylene oxide is 1:1.1:1:10.
the embodiment also provides a method for preprocessing the pumice powder in the detachable ink-absorbing coating, wherein the pumice powder is preprocessed and then used, and the method comprises the following specific steps:
immersing pumice powder in a fatty acid salt aqueous solution with the mass concentration of 3% (the addition amount of the fatty acid salt aqueous solution is 3 times of the mass of the pumice powder) for 10min, centrifuging to remove water and drying; soaking porous nano powder (porous nano ceramic powder) in a quaternary ammonium salt aqueous solution with the mass concentration of 2% (the adding amount of the quaternary ammonium salt aqueous solution is 3 times that of the porous nano powder) for 20min, centrifuging to remove water and drying; dispersing the soaked pumice powder and the porous nano powder in a dispersing machine for 1h to finish pretreatment.
The curing conditions of the detachable ink-absorbing coating are as follows: coating a layer of wet slurry on the PET film, wherein the coating thickness is 5g/m based on the mass of the dry slurry 2 The coating speed was 40m/4min (i.e. 40 meters of coating oven line, total duration 4 min), and the temperature was set to: drying at 88 ℃ for 15s, drying at 115 ℃ for 80s, drying at 135 ℃ for 50s, drying at 120 ℃ for 35s, and drying at 95 ℃ for 60s.
The remainder was the same as in example 4.
Example 6
The embodiment provides a detachable ink-absorbing coating for digital printing of clothing labels, which comprises the following raw materials in parts by mass: 18 parts of composite release agent, 1 part of dispersing agent, 1 part of wetting agent (polyoxyethylene fatty alcohol ether), 1 part of glycol, 1 part of silicon dioxide matte powder, 1 part of thickening agent (hydroxypropyl methyl cellulose), 0.8 part of sodium chloride, 60 parts of water and 15 parts of combination of acrylic emulsion and fluorocarbon emulsion (the ratio of the two is 1:1), wherein the composite release agent comprises the following components in percentage by mass: 1.25 aluminum stearate and barium sulfate.
The application process conditions of the detachable ink-absorbing coating on the digital printing of the clothing label are as follows: the temperature is 165 ℃, the pressure is 4 kg, and the ironing machine is used for ironing for 15 seconds.
The barium sulfate is used after being coated, and the specific steps are as follows: drying barium sulfate, spraying the mixture of molten polyethylene wax and pumice powder onto the surface of the dried barium sulfate, and cooling at normal temperature.
The mass ratio of the barium sulfate to the polyethylene wax to the pumice powder is 1:0.2:0.1, wherein the melting point of the polyethylene wax is 100 ℃, and the particle size of the pumice powder is 0.1mm.
The embodiment also provides a dispersing agent in the detachable ink-absorbing coating, and the preparation method comprises the following steps:
s1, carrying out esterification reaction on 10-undecen-1-ol and gluconic acid under the condition of a concentrated sulfuric acid catalyst (the addition amount is 3% of the total mass of the reaction raw materials), wherein the reaction temperature is 110 ℃, and the reaction time is 3 hours, so as to obtain an esterification product;
s2, uniformly mixing acrylic acid and potassium hydroxide (the addition amount is 4% of the molar mass of the acrylic acid) in a reaction kettle, vacuum dehydrating, introducing propylene oxide, reacting at 190 ℃ under the pressure of 0.3MPa for 6 hours, and cooling after the reaction to obtain polyoxyethylene acrylate;
and S3, carrying out polyaddition reaction on the esterified product obtained in the step S1 and polyoxyethylene acrylic ester obtained in the step S2 under the condition that an initiator (tert-butyl hydroperoxide/sodium metabisulfite, the addition amount of which is 0.6% of the total mass of the reaction raw materials), wherein the reaction temperature is 80 ℃, and the reaction time is 4 hours, thus obtaining the dispersing agent.
Wherein, the mol ratio of the 10-undecen-1-ol, the gluconic acid, the acrylic acid and the propylene oxide is 1:1.2:2:30.
the embodiment also provides a method for preprocessing the pumice powder in the detachable ink-absorbing coating, wherein the pumice powder is preprocessed and then used, and the method comprises the following specific steps:
immersing pumice powder in a fatty acid salt water solution with the mass concentration of 5% (the addition amount of the pumice powder is 6 times of the mass of the pumice powder) for 30min, centrifuging to remove water and drying; soaking porous nanometer powder (porous nanometer ceramic powder) in quaternary ammonium salt water solution with mass concentration of 4% (the addition amount is 5 times of the mass of the porous nanometer powder) for 40min, centrifuging to remove water, and oven drying; dispersing the soaked pumice powder and the porous nano powder in a dispersing machine for 2 hours to finish pretreatment.
The curing conditions of the detachable ink-absorbing coating are as follows: coating a layer of wet slurry on the PET film, wherein the coating thickness is 5g/m based on the mass of the dry slurry 2 The coating speed was 40m/5min (i.e. 40 meters of coating oven line, total duration 5 min), and the temperature was set to: baking at 80 ℃ for 20s, baking at 110 ℃ for 100s, baking at 130 ℃ for 60s, baking at 115 ℃ for 50s, and baking at 90 ℃ for 70s.
The remainder was the same as in example 4.
Comparative example 1
This comparative example differs from example 4 in that the composite release agent was replaced with aluminum stearate.
Comparative example 2
This comparative example differs from example 4 in that the composite release agent was replaced with barium sulfate.
Comparative example 3
The difference between this comparative example and example 4 is that the mass ratio of aluminum stearate to barium sulfate is 1:0.5.
comparative example 4
The difference between this comparative example and example 4 is that the mass ratio of aluminum stearate to barium sulfate is 1:1.7.
comparative example 5
This comparative example differs from example 4 in that the barium sulfate coating treatment was performed without using pumice powder.
Comparative example 6
The comparative example differs from example 4 in that the release ink-receptive coating does not contain sodium chloride, and the release ink-receptive coating is applied after the substrate (support) is immersed in an aqueous solution of sodium chloride (sodium chloride: water=0.4:55) for 1 hour.
Comparative example 7
The comparative example differs from example 4 in that the mass part of sodium chloride in the releasable ink-receptive coating is 0.05 part.
Comparative example 8
The comparative example differs from example 4 in that the mass part of sodium chloride in the releasable ink-receptive coating is 1 part.
Comparative example 9
This comparative example differs from example 4 in that the fluorocarbon emulsion is replaced by an aqueous polyurethane emulsion.
Comparative example 10
This comparative example differs from example 5 in that the dispersant is sodium dodecylbenzenesulfonate.
Comparative example 11
This comparative example differs from example 5 in that the dispersant is a polyoxyethylene fatty acid ester.
Comparative example 12
The difference between the comparative example and the example 6 is that the specific pretreatment method of the pumice powder is as follows: dispersing the pumice powder and the porous nano powder in a dispersing machine for 2 hours.
Comparative example 13
The present comparative example differs from example 6 in that the curing temperature conditions of the releasable ink-receptive coating are: baking at 80 deg.C for 20s, baking at 110 deg.C for 100s, and baking at 130 deg.C for 60s.
Comparative example 14
The present comparative example differs from example 6 in that the curing temperature conditions of the releasable ink-receptive coating are: baking at 110 deg.c for 100s and at 130 deg.c for 60s.
Comparative example 15
The present comparative example differs from example 6 in that the curing temperature conditions of the releasable ink-receptive coating are: baking at 130 deg.C for 60s,115 deg.C for 50s, and 90 deg.C for 70s.
Comparative example 16
The present comparative example differs from example 6 in that the curing temperature conditions of the releasable ink-receptive coating are: baking at 110deg.C for 5min.
Comparative example 17
The present comparative example differs from example 6 in that the curing temperature conditions of the releasable ink-receptive coating are: and baking at 130 ℃ for 5min.
Comparative example 18
The present comparative example differs from example 6 in that the curing temperature conditions of the releasable ink-receptive coating are: and baking at 115 ℃ for 5min.
1. Basic film performance detection of the detachable ink-absorbing coating prepared by the invention
The detachable ink-absorbing coatings prepared in examples 1 to 6 and comparative examples 1 to 5, 9 and 12 to 18 were subjected to basic performance detection, and the detection items were:
(1) Visual inspection (appearance)
A. The film surface is smooth and uniform, and no obvious flaws exist.
B. The back side has a slight streak area of about 2%, the front side has a slight streak area of about 1%, and a slight small bubble area of about 2% is acceptable.
C. The back side has a slight streak area of about 5%, the front side has a slight streak area of about 3%, and the slight small bubble area is about 5%, which is acceptable.
(2) White ink printer (printing drying test)
After printing, the color of the product is checked, and the maximum ink carrying quantity (60% of white ink is completely free from piling ink flowing ink (qualified) to 100% (grade A) and 100% of color ink (grade A) is obtained, and the drying temperature is 145 ℃/3 minutes:
A. the printing color is clear and uniform, the phenomena of ink flying, ink blushing, ink flowing, cracking and the like are avoided, and the printing color is acceptable, and the phenomena of foaming, cracking, edge whitening and the like are avoided after drying.
B. The printing color is clear and uniform, ink flows and is piled up, and the printing color is unacceptable.
C. The printing primary color is clear but bluish, and the phenomena of ink flying, ink corona, ink bleeding, cracking and the like are avoided, and the phenomena of cracking and edge whitening are avoided after drying, so that the printing primary color is unacceptable.
D. The printing color is clear and uniform, the phenomena of ink flying, ink blushing, ink flowing, cracking and the like are avoided, the phenomenon of foaming, cracking and slight edge whitening is avoided after drying, and the printing is acceptable.
(3) Pneumatic pressing machine (pressing test)
The lamination effect of the pressing test pattern is good, the temperature is 150-160 ℃, and the pressing time is 8-10 seconds:
A. second OK, wen Si OK, cold tearing OK, no tearing phenomenon and good adhesive force.
B. Second OK, wen Si NG tape edge cocked, cold tear OK, unacceptable.
C. Second tearing OK, wen Si OK, cold tearing NG are tight, tearing is not movable, and unacceptable.
(4) Siemens drum washing machine (washing resistance test)
The pattern should be intact, not easy to deglue, not crack/fade/not delaminate/not wrinkle (machine wash temperature 40 ℃/1200 turns/1.5H/times, machine wash resistance 10 times):
A. the pattern should be intact for 10 machine washes.
B. The machine washing is carried out for 8 times, and the degumming, cracking and wrinkling are not acceptable.
C. The machine washing is carried out for 1 time, and the patterns fall off and are not acceptable.
(5) Pine drier (drying test after washing machine)
Drying temperature duration 60 ℃/1H, and clothes weight about 2kg:
A. the product is free from cracking and adhesion after drying.
B. The product is not cracked and slightly adhered after being dried, and is unacceptable.
C. Cracking and adhesion after drying are unacceptable.
The results of the above tests are specifically shown in Table 1 below.
TABLE 1
As can be seen from Table 1, the release ink-receptive coatings prepared in examples 4, 5 and 6 of the present invention were satisfactory in all tests and excellent in performance.
Wherein, compared with comparative example 1, after the coating treatment is carried out on the barium sulfate in example 2, the release effect of the barium sulfate is improved, so that the coating passes the pressing test and the product is qualified. On the basis of the embodiment 2, the embodiment 3 also provides a specific dispersing agent, which promotes the dispersion of powder materials (such as aluminum stearate and barium sulfate) in the coating, but also promotes the floating of polyethylene wax in the barium sulfate coating when the polyethylene wax is melted, and influences the release effect, so that the pressing test is failed. On the basis of the embodiment 3, the pumice powder is pretreated in the embodiment 4, and specific curing conditions are adopted, so that the appearance of the coating and the ironing test effect are improved, and the product is qualified.
Compared with the example 4, the comparative examples 1-5 change the raw material composition and the proportion of the composite release agent, and the result is that the pressing test is not qualified; comparative example 9 after the fluorocarbon emulsion was changed to the aqueous polyurethane emulsion, the coating appearance, the print drying test and the water washing resistance were all affected, and the product was failed.
Compared with the example 6, the comparative example 12 directly disperses the pumice powder and the porous nano powder, and the results influence the appearance of the coating, the printing and drying test and the pressing test, and the product is unqualified; comparative examples 13 to 18 each had a coating effect inferior to that of example 6 by changing the curing temperature conditions of the coating.
2. Ink absorption of the detachable ink absorption coating prepared by the invention
The ink-receptive coatings prepared in examples 4 to 6 and comparative examples 6 to 9 of the present invention were tested for ink-receptive properties according to the Bai Mo printer (print-dry test) described above, wherein the coating thickness was 5g/m dry paste 2 The maximum ink carrying amount (60% white ink, no piling ink at all (pass) to 100% (grade a), and 100% color ink (grade a) results are shown in table 2 below.
TABLE 2
As is clear from the results in Table 2, the maximum ink-carrying amounts of the release ink-absorbing coatings prepared in examples 4 to 6 of the present invention were all 100%, and the ink-absorbing properties were excellent.
Wherein, comparative example 6 directly treats the substrate with sodium chloride, affecting the ink absorbency of the coating; comparative examples 7 and 8 changed the amount of sodium chloride added; although the ink absorption properties of the final comparative examples 6 to 8 were acceptable, the effects were inferior to those of examples 4 to 6. The comparative example 9 uses an aqueous polyurethane emulsion, and as a result, the maximum ink carrying amount is not acceptable and the ink absorbing performance is poor.
3. Slurry dispersion stability of the prepared detachable ink-absorbing coating
Slurries of the releasable ink-receptive coatings were prepared according to the methods of examples 4, 5, 6 and comparative examples 10, 11 of the present invention, and then the dispersion of the slurries was observed at different times under the same environment, as shown in table 3 below.
TABLE 3 Table 3
As is clear from the results shown in Table 3, the dispersants prepared in examples 4, 5 and 6 of the present invention are excellent in dispersion effect, are not layered, and are excellent in dispersion stability, as compared with comparative examples 10 and 11.
In comparison with example 5, comparative examples 10 and 11, in which the dispersant of the present invention was changed to sodium dodecylbenzenesulfonate and polyoxyethylene fatty acid ester, the powder dispersion effect in the coating was affected, and delamination occurred to different extents after standing for different times.
The invention has the beneficial effects that: the detachable ink-absorbing coating for digital printing of the clothing label has the effects of releasing and absorbing ink and good coating performance.
Finally, it should be noted that the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiment, but may be modified or some of the technical features thereof may be replaced by other technical solutions described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. The utility model provides a can be from black coating is inhaled to detachable that is used for clothing label digital printing which characterized in that: the material comprises the following raw materials in parts by mass: 2-18 parts of composite release agent, 0.2-1 part of dispersing agent, 0.1-1 part of wetting agent, 0.1-1 part of glycol, 0.1-1 part of matte powder, 0.1-1 part of thickening agent, 0.1-0.8 part of sodium chloride or calcium chloride, 50-60 parts of water, and 1-15 parts of fluorocarbon emulsion or acrylic emulsion or the combination of two emulsions, wherein the composite release agent comprises the following components in percentage by mass: (1-1.25) aluminum stearate and barium sulfate;
the barium sulfate is used after being coated, and the specific steps are as follows: drying barium sulfate, spraying a mixture of molten polyethylene wax and pumice powder on the surface of the dried barium sulfate, and cooling the mixture at normal temperature;
the mass ratio of the barium sulfate to the polyethylene wax to the pumice powder is 1: (0.06-0.2): (0.03-0.1);
the preparation method of the dispersing agent comprises the following steps:
s1, carrying out esterification reaction on 10-undecen-1-ol and gluconic acid under the condition of a catalyst, wherein the reaction temperature is 100-110 ℃, and the reaction time is 3-6 hours, so as to obtain an esterification product;
s2, uniformly mixing acrylic acid and potassium hydroxide in a reaction kettle, introducing propylene oxide after vacuum dehydration, and cooling after the reaction is finished at the reaction temperature of 170-190 ℃ and the pressure of 0.2-0.3 MPa to obtain polyoxyethylene acrylate;
s3, carrying out polyaddition reaction on the esterified product obtained in the step S1 and polyoxyethylene acrylate obtained in the step S2 under the condition of an initiator, wherein the reaction temperature is 70-80 ℃ and the reaction time is 3-4 h, so as to obtain the dispersing agent;
the molar ratio of the 10-undecen-1-ol, the gluconic acid, the acrylic acid and the propylene oxide is 1: (1.1-1.2): (1-2): (10-30);
in the step S1, the catalyst is concentrated sulfuric acid, the adding amount of the catalyst is 1-3% of the total mass of the reaction raw materials,
in the step S2, the adding amount of potassium hydroxide is 1-4% of the molar mass of the acrylic acid, and the reaction time is 6-8 hours;
in the step S3, the initiator is ammonium persulfate/sodium bisulfite, benzoyl peroxide/N, N-diethylaniline or tertiary butyl hydroperoxide/sodium metabisulfite, and the addition amount of the initiator is 0.2-0.6% of the total mass of the reaction raw materials;
the pumice powder is pretreated and then used, and the specific method comprises the following steps:
immersing pumice powder in an anionic surfactant aqueous solution for 10-30 min, centrifuging to remove water and drying; soaking the porous nano powder in a cationic surfactant aqueous solution for 20-40 min, centrifuging to remove water and drying; dispersing the soaked pumice powder and the porous nano powder in a dispersing machine for 1-2 hours to finish pretreatment;
the anionic surfactant aqueous solution is a fatty acid salt aqueous solution with the mass concentration of 3-5%, the addition amount of the anionic surfactant aqueous solution is 3-6 times of the mass of pumice powder, the cationic surfactant aqueous solution is a quaternary ammonium salt aqueous solution with the mass concentration of 2-4%, the addition amount of the cationic surfactant aqueous solution is 3-5 times of the mass of porous nano powder, and the porous nano powder is porous nano ceramic powder;
the curing conditions of the detachable ink-absorbing coating are as follows: coating a layer of wet slurry on the PET film, wherein the coating thickness is 5g/m based on the mass of the dry slurry 2 The coating speed is 40 m/(3 min-5 min), and the temperature is set as follows: baking at 80-95 deg.C for 10-20 s, baking at 110-120 deg.C for 60-100 s, baking at 130-140 deg.C for 40-60 s, baking at 115-125 deg.C for 20-50 s, and baking at 90-100 deg.C for 50-70 s.
2. Use of a detachable ink-receptive coating according to claim 1 for digital printing of garment labels, characterized in that: the application process conditions of the detachable ink-absorbing coating are as follows: the temperature is 150-165 ℃, the pressure is 4 kg, and the ironing machine is used for ironing for 10-15 seconds.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2772035A1 (en) * 1997-12-04 1999-06-11 Ceca Sa ANTISTATIC AGENT AND ANTI-ACID FOR POLYMERIC COMPOSITION, USE OF THE AGENT IN POLYMER COMPOSITIONS AND POLYMERIC COMPOSITIONS OBTAINED
CN107699067A (en) * 2016-08-04 2018-02-16 上海艾乐影像材料有限公司 Mould release, mould release membrance, composite membrane, ink-jet printing media and its preparation method and application
CN108822617A (en) * 2018-04-02 2018-11-16 合肥佳洋电子科技有限公司 A kind of clothes printing ink and preparation method thereof
CN115233497A (en) * 2022-07-18 2022-10-25 宜兴市佳普林新材料有限公司 Method for manufacturing quick-drying paint ink transfer paper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2772035A1 (en) * 1997-12-04 1999-06-11 Ceca Sa ANTISTATIC AGENT AND ANTI-ACID FOR POLYMERIC COMPOSITION, USE OF THE AGENT IN POLYMER COMPOSITIONS AND POLYMERIC COMPOSITIONS OBTAINED
CN107699067A (en) * 2016-08-04 2018-02-16 上海艾乐影像材料有限公司 Mould release, mould release membrance, composite membrane, ink-jet printing media and its preparation method and application
CN108822617A (en) * 2018-04-02 2018-11-16 合肥佳洋电子科技有限公司 A kind of clothes printing ink and preparation method thereof
CN115233497A (en) * 2022-07-18 2022-10-25 宜兴市佳普林新材料有限公司 Method for manufacturing quick-drying paint ink transfer paper

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