CN113372782B - Metal or oxide evaporation enhanced PET (polyethylene terephthalate) online coating liquid - Google Patents
Metal or oxide evaporation enhanced PET (polyethylene terephthalate) online coating liquid Download PDFInfo
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- 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
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/064—Copolymers with monomers not covered by C09D133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2433/12—Homopolymers or copolymers of methyl methacrylate
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Abstract
The invention relates to the technical field of online coating liquid, in particular to PET online coating liquid enhanced by metal or oxide evaporation, which comprises the following components in percentage by mass: 12-25% of water-based acrylic emulsion, 65-80% of deionized water, 5-10% of isopropanol, 1-2% of water-based anti-adhesion agent SNOWTEXZL and 0.1-0.5% of water-based wetting and leveling agent SURFYNOL 440; wherein the water-based acrylic emulsion comprises the following components in percentage by mass: 4-6% of cyclotrimethylolpropane methylal acrylate monomer, 19-23% of methyl methacrylate, 11-13% of N-butyl acrylate, 0.4-1.2% of acrylic acid, 2-3.2% of N-hydroxymethyl acrylamide, 0.1-0.2% of initiator/ammonium persulfate, 0.03-0.05% of sodium bicarbonate, 0.9-1% of reactive emulsifier DNS-86, 0.6-0.7% of DMAE and 55-60% of deionized water. According to the invention, because the coating is carried out before the film is transversely stretched, the coating liquid does not contact with the roller in the drying process, the possibility of generating wire wiping is greatly reduced, and the high yield of the product is ensured.
Description
Technical Field
The invention relates to the technical field of online coating liquid, in particular to PET online coating liquid enhanced by metal or oxide evaporation.
Background
The PET film is widely used in the packaging industry, the decoration industry or the optical field, further processing treatment is often required on the surface of the PET film, such as aluminum plating, silver plating or aluminum oxide, but the adhesion with a PET base film is weak, the requirement cannot be met even through a corona treatment mode on the surface of the PET film, some manufacturers adopt an off-line coating pretreatment agent to enhance the interlayer adhesion of a vapor deposition layer, but the problem of service time limit is often existed in the use process, and the coating of the pretreatment layer is thick, the boiling resistance experiment and the anti-adhesion property cannot completely meet the requirement. The coating process cannot be widely adapted to the requirements of downstream customers, so that the use is inconvenient and the product quality fluctuates, and off-line coating can contact more rollers in the coating process, so that the mechanical scratch of the film finally influences the appearance of the product.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an on-line PET coating liquid to solve the problems.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the PET online coating liquid for metal or oxide evaporation reinforcement comprises the following components in percentage by mass:
wherein the water-based acrylic emulsion comprises the following components in percentage by mass:
the preparation method of the water-based acrylic emulsion comprises the following steps: the method comprises the following specific steps:
the method comprises the following steps: uniformly stirring 35-40% of deionized water, 0.3-0.4% of reaction type emulsifier DNS-86 and 0.03-0.05% of sodium bicarbonate, adding the mixture into a four-neck flask provided with a stirrer, a thermometer, a reflux condenser tube and a dropping funnel, adding 0.07-0.1% of Acrylic Acid (AA) and 3-4% of Methyl Methacrylate (MMA) into the four-neck flask, stirring and heating to 75-80 ℃. Uniformly mixing 0.03-0.05% of initiator ammonium persulfate and 0.5-1% of deionized water, dripping into the four-neck flask within 5 minutes, and reacting for about 30 minutes until the emulsion becomes light blue to obtain seed emulsion;
step two: uniformly mixing 0.3-0.5% of Acrylic Acid (AA), 1-3% of N-Butyl Acrylate (BA), 14-15% of Methyl Methacrylate (MMA) and 1-2% of NMA N-hydroxymethyl acrylamide to obtain a first mixed monomer, uniformly mixing 0.2-0.3% of a reactive emulsifier DNS-86, 0.03-0.05% of initiator ammonium persulfate and 7-9% of deionized water, adding the mixture into the first mixed monomer, stirring until a stable first pre-emulsion is formed, and dropwise adding the first pre-emulsion into the seed emulsion in the step one within 1.5 hours;
step three: uniformly mixing 0.3-0.5% of Acrylic Acid (AA), 9-12% of N-Butyl Acrylate (BA), 1-3% of Methyl Methacrylate (MMA), 4-6% of cyclotrimethylolpropane methylal acrylate monomer EM212 and 1-2% of NMA N-hydroxymethyl acrylamide to obtain a second mixed monomer, uniformly mixing 0.2-0.3% of reaction type emulsifier DNS-86, 0.03-0.05% of initiator/ammonium persulfate and 7-9% of deionized water, adding the mixture into the second mixed monomer, stirring until a stable second pre-emulsion is formed, dropwise adding the second pre-emulsion into the second emulsion within 1.5 hours, preserving heat for 2 hours, cooling, adding 0.6-0.7% of DMAE and 7-8% of deionized water, neutralizing, filtering and discharging to obtain the water-based polyacrylic emulsion A.
As a further scheme of the invention, the preparation method of the PET online coating liquid comprises the following specific steps:
sequentially adding 12-25% of water-based acrylic emulsion, 65-80% of deionized water, 5-10% of isopropanol, 1-2% of water-based anti-adhesion agent SNOWTEX ZL and 0.1-0.5% of water-based wetting and leveling agent SURFYNOL440, stirring and dispersing uniformly, and filtering to remove impurities and foams to obtain the PET online coating liquid.
As a further scheme of the invention, the solid content of the water-based polyacrylic acid emulsion is 30-50%.
As a further scheme of the invention, the solid content of the PET online coating liquid is 5-15%.
As a further scheme of the invention, the PET online coating liquid is applied to the bonding of a PET base film and a metal evaporation or oxide layer.
As a further scheme of the invention, the application method comprises the following steps: the prepared PET online coating liquid is coated on a 250 mu transparent PET base film by a 3 mu wire rod, transversely stretched by 3.2 times, and heat-set at 230 ℃ for 10 seconds to obtain a precoat layer with the dry film thickness of about 100 nanometers.
As the technical scheme is adopted, the invention has the advantages and positive effects that: hard sections and soft sections are distributed on an emulsion core and an emulsion shell through the sectional design of high polymer materials used by the online coating liquid so as to adjust the flexibility after film forming, the cyclotrimethylolpropane methylal acrylate monomer is distributed on the shell through sectional polymerization to enhance the adhesive force of a vapor deposition layer, and the self-crosslinking monomer N-hydroxymethyl acrylamide improves the boiling resistance of the coating. Meanwhile, the drying is realized by utilizing the energy in the film manufacturing process, so that the energy is saved, the high-temperature fusion of the pretreatment layer and the base film is realized, and the extremely high peeling strength is achieved. The coating liquid is coated before the film is transversely stretched in the online coating process, and the coating liquid does not contact with the roller in the drying process, so that the possibility of producing wire wiping is greatly reduced, and the high yield of the product is ensured.
Detailed Description
The present invention is further illustrated by the following examples, but the scope of the present invention is not limited to the following examples.
The sources of the raw materials in the examples are as follows:
the preparation method of the water-based acrylic emulsion comprises the following steps:
step one, 154 g of deionized water, 1.5 g of reactive emulsifier DNS-86 and 0.15 g of sodium bicarbonate are uniformly stirred and added into a four-neck flask provided with a stirrer, a thermometer, a reflux condenser and a dropping funnel, then 0.3 g of acrylic acid and 14.7 g of methyl methacrylate are added into the four-neck flask, stirred and heated to 75-80 ℃. Uniformly mixing 0.15 g of initiator/ammonium persulfate and 3g of deionized water, dripping into the four-neck flask within 5 minutes, and reacting for about 30 minutes until the seed emulsion becomes light blue;
step two, uniformly mixing 1.35 g of acrylic acid, 7.5 g of N-butyl acrylate, 58.1 g of methyl methacrylate and 4.7 g of NMA N-hydroxymethyl acrylamide to obtain a first mixed monomer, uniformly mixing 1.15 g of a reactive emulsifier DNS-86, 0.15 g of an initiator/ammonium persulfate and 29 g of deionized water, adding the first mixed monomer, stirring until a stable first pre-emulsion is formed, and dropwise adding the first pre-emulsion into the seed emulsion in the step one within 1.5 hours;
step three, uniformly mixing 1.35 g of acrylic acid, 40g of N-butyl acrylate, 7.5 g of methyl methacrylate, 18.125 g of cyclotrimethylolpropane methylal acrylate monomer and 4.7 g of N-hydroxymethyl acrylamide to obtain a second mixed monomer, uniformly mixing 1.15 g of a reactive emulsifier DNS-86, 0.15 g of an initiator/ammonium persulfate and 29 g of deionized water, adding the second mixed monomer, stirring until a stable second pre-emulsion is formed, dropwise adding the second pre-emulsion into the emulsion obtained in the step two within 1.5 hours, keeping the temperature for 2 hours, reducing the temperature, adding 2.6 g of DMAE and 33 g of deionized water, filtering and discharging to obtain the water-based polyacrylic acid emulsion A with the solid content of 40%.
Example 1
Sequentially adding the water-based acrylic emulsion A, deionized water, isopropanol, the water-based anti-adhesion agent SNOWTEX ZL (70-100nm) and the water-based wetting leveling agent SURFYNOL440 in the proportion in sequence, stirring and dispersing uniformly, and filtering to remove impurities and foams to obtain the PET online coating liquid with the solid content of 10%.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3 mu wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
Example 2
The water-based acrylic emulsion A, deionized water, isopropanol, the water-based anti-adhesion agent SNOWTEX ZL (70-100nm) (solid content is 40%) and the water-based wetting and leveling agent SURFYNOL440 are sequentially added according to the proportion, stirred and dispersed uniformly, and filtered to remove impurities and foams. Thus obtaining the PET on-line coating liquid with the solid content of 5.2 percent.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3 mu wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
Comparative example 1
The non-soft segment polymerization water-based acrylic emulsion B comprises the following steps:
(1) uniformly stirring 40g of water, 0.38g of a reactive emulsifier DNS-86 (Guangzhou double bond trade company, Ltd.) and 0.04g of sodium bicarbonate, adding the mixture into a four-neck flask provided with a stirrer, a thermometer, a reflux condenser and a dropping funnel, adding 0.08g of Acrylic Acid (AA), 3.7g of Methyl Methacrylate (MMA) into the four-neck flask, stirring and heating the mixture to 80 ℃, uniformly mixing 0.04g of initiator/ammonium persulfate and 0.8g of deionized water, and dropping the mixture into the four-neck flask within 5 minutes to react for about 30 minutes until the seed emulsion is light blue;
(2) uniformly mixing 0.68g of Acrylic Acid (AA), 12g of N-Butyl Acrylate (BA), 16.6g of Methyl Methacrylate (MMA) and 2.3g of NMA N-hydroxymethyl acrylamide, uniformly mixing 0.6g of a reactive emulsifier DNS-86, 0.08g of an initiator/ammonium persulfate and 14.6g of deionized water, adding a mixed monomer, stirring until a stable pre-emulsion is formed, and dropwise adding the pre-emulsion into a seed emulsion within 3 hours; and (3) preserving the temperature for 2 hours, reducing the temperature, adding 0.63g of DMEA and 7.47g of deionized water, neutralizing, filtering and discharging to obtain the water-based polyacrylic emulsion B with the solid content of 40%.
Sequentially adding the water-based acrylic emulsion B, deionized water, isopropanol, the water-based anti-adhesion agent SNOWTEX ZL (70-100nm) (with the solid content of 40%) and the water-based wetting and leveling agent SURFYNOL440 in the above proportion, stirring and dispersing uniformly, filtering to remove impurities and foams. Thus obtaining the PET on-line coating liquid with the solid content of 10 percent.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3 mu wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
Comparative example 2
Sequentially adding the waterborne polyester MD-1200, the deionized water, the isopropanol, the waterborne anti-adhesion agent SNOWTEX ZL (70-100nm) and the waterborne wetting leveling agent SURFYNOL440 in the proportion in sequence, stirring and dispersing uniformly, and filtering to remove impurities and foams to obtain the PET online coating liquid with the solid content of 10%.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3 mu wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
Comparative example 3
Sequentially adding the waterborne polyurethane 4221 (with the solid content of 40%), deionized water, isopropanol, a waterborne anti-adhesion agent SNOWTEX ZL (70-100nm) (with the solid content of 40%) and a waterborne wetting and leveling agent SURFYNOL440 in the proportion according to the sequence, stirring and dispersing uniformly, and filtering to remove impurities and foams. Thus obtaining the PET on-line coating liquid with the solid content of 10 percent.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3 mu wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
Comparative example 4
Sequentially adding the waterborne polyurethane AP-201, deionized water, isopropanol, a waterborne anti-adhesion agent SNOWTEX ZL (70-100nm) and a waterborne wetting leveling agent SURFYNOL440 in the proportion in sequence, stirring and dispersing uniformly, and filtering to remove impurities and foams to obtain the PET online coating liquid with the solid content of 10%.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3-wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
Comparative example 5
The water-based acrylic emulsion A-1127 (with the solid content of 44%), deionized water, isopropanol, the water-based anti-adhesion agent SNOWTEX ZL (70-100nm) (with the solid content of 40%) and the water-based wetting leveling agent SURFYNOL440 are sequentially added according to the proportion, stirred and dispersed uniformly, filtered to remove impurities and foams. Thus obtaining the PET on-line coating liquid with the solid content of 10 percent.
And (3) a drying process: coating the prepared PET online coating liquid on a 250 mu transparent PET base film by using a 3-wire rod, transversely stretching by 3.2 times, carrying out heat setting at 230 ℃ for 10 seconds to obtain a pretreatment layer with the dry film thickness of about 100 nanometers, and cooling to room temperature for performance test.
The light transmittance is carried out according to GB/T2410-2008;
haze is carried out according to GB/T2410-2008;
surface tension was performed according to GB/T14216-2008;
the alumina coating Baige test was performed according to GB/T9286-1998;
oxygen transmission (cc/m) of MFB3510 plated with alumina + barrier coating224h)0.3-0.9, the index adhesion is less than or equal to grade 1, and the visual appearance is not obviously changed;
and (3) testing adhesive force, namely marking hundreds grids on the surface of the product at the intervals of 1mm up, down, left and right by using a hundred-grid cutter, standing for 90 +/-30 seconds, testing by using a 810 adhesive tape, pressing for 3 times, instantly pulling up in the direction of 90 degrees, and stripping the paint on the surface to be less than or equal to 5 percent.
And (3) hardness testing: the Mitsubishi Uni pencil forms an angle of 45 degrees with the surface to be tested, 500g of load moves 3-5 cm on the surface of the object to be tested for testing, and the surface of the product is not damaged.
Table 1 shows the results of performance tests on the transparent PET base film prepared in the above example
If the precoating layer has poor heat resistance, the result of good flexibility is that the evaporated particles are relatively large, the adhesion with the evaporated layer is good, and the barrier property is poor. If the precoat layer is too heat resistant, poor flexibility results in poor embedding of the evaporated particles into the precoat layer, poor adhesion to the evaporated layer, and poor barrier properties.
From the above, it can be seen from table 1 that the present invention enhances the adhesion between PET and a vapor deposition layer by using the cyclic trimethylolpropane formal acrylate monomer EM212, and adjusts the heat resistance and flexibility by means of the stepwise polymerization during the polymerization of the aqueous acrylic resin. The ideal metal and oxide evaporation process can be described by the following model: the evaporated particles are relatively dense and partially embedded in the precoat.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (6)
1. The metal or oxide evaporation enhanced PET online coating liquid is characterized in that: the online coating liquid comprises the following components in percentage by mass:
12-25% of water-based acrylic emulsion
65-80% of deionized water
5-10% of isopropanol
1-2% of water-based anti-adhesion agent SNOWTEX ZL
SURFYNOL 4400.1-0.5% of water-based wetting and leveling agent
The preparation method of the water-based acrylic emulsion comprises the following steps: the method comprises the following specific steps:
the method comprises the following steps: uniformly stirring 35-40% of deionized water, 0.3-0.4% of a reactive emulsifier DNS-86 and 0.03-0.05% of sodium bicarbonate, adding the mixture into a four-neck flask provided with a stirrer, a thermometer, a reflux condenser tube and a dropping funnel, adding 0.07-0.1% of acrylic acid and 3-4% of methyl methacrylate into the four-neck flask, stirring and heating the mixture to 75-80 ℃, uniformly mixing 0.03-0.05% of initiator ammonium persulfate and 0.5-1% of deionized water, dropping the mixture into the four-neck flask within 5 minutes, reacting for 30 minutes until the emulsion becomes light blue, and obtaining a seed emulsion;
step two: uniformly mixing 0.3-0.5% of acrylic acid, 1-3% of N-butyl acrylate, 14-15% of methyl methacrylate and 1-2% of N-hydroxymethyl acrylamide to obtain a first mixed monomer, uniformly mixing 0.2-0.3% of a reactive emulsifier DNS-86, 0.03-0.05% of an initiator ammonium persulfate and 7-9% of deionized water, adding the mixture into the first mixed monomer, stirring until a stable first pre-emulsion is formed, and dropwise adding the first pre-emulsion into the seed emulsion in the first step within 1.5 hours;
step three: uniformly mixing 0.3-0.5% of acrylic acid, 9-12% of N-butyl acrylate, 1-3% of methyl methacrylate, 4-6% of cyclotrimethylolpropane methylal acrylate monomer EM212 and 1-2% of N-hydroxymethyl acrylamide to obtain a second mixed monomer, uniformly mixing 0.2-0.3% of a reactive emulsifier DNS-86, 0.03-0.05% of an initiator ammonium persulfate and 7-9% of deionized water, adding the mixture into the second mixed monomer, stirring until a stable second pre-emulsion is formed, dropwise adding the second pre-emulsion into the second emulsion within 1.5 hours, keeping the temperature for 2 hours, reducing the temperature, adding 0.6-0.7% of DMAE and 7-8% of deionized water, filtering and discharging to obtain the water-based acrylic emulsion.
2. The metal or oxide vapor deposition-enhanced PET in-line coating liquid as claimed in claim 1, wherein: the preparation method of the PET online coating liquid comprises the following specific steps:
sequentially adding 12-25% of water-based acrylic emulsion, 65-80% of deionized water, 5-10% of isopropanol, 1-2% of water-based anti-adhesion agent SNOWTEX ZL and 0.1-0.5% of water-based wetting and leveling agent SURFYNOL440, stirring and dispersing uniformly, and filtering to remove impurities and foams to obtain the PET online coating liquid.
3. The metal or oxide vapor deposition-enhanced PET in-line coating liquid as claimed in claim 1, wherein: the solid content of the water-based acrylic emulsion is 30-50%.
4. The metal or oxide vapor deposition-enhanced PET in-line coating liquid as claimed in claim 2, wherein: the solid content of the PET online coating liquid is 5-15%.
5. The metal or oxide vapor deposition-enhanced PET in-line coating liquid as claimed in claim 2, wherein: the PET online coating liquid is applied to bonding of a PET base film and a vapor plating metal or oxide layer.
6. The metal or oxide vapor deposition-enhanced PET in-line coating liquid as claimed in claim 5, wherein: the application method comprises the following steps: the PET on-line coating liquid was coated on a 250 μ transparent PET base film with a 3 μ wire rod, transversely stretched by 3.2 times, and heat-set at 230 ℃ for 10 seconds to obtain a pretreatment layer having a dry film thickness of 100 nm.
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| CN104369495B (en) * | 2014-10-23 | 2016-06-29 | 海南赛诺实业有限公司 | The plating pellumina of a kind of autohension acrylic emulsion coating and manufacture method thereof |
| CN110563878B (en) * | 2018-06-06 | 2022-05-27 | 广州慧谷化学有限公司 | Polyacrylate resin, dispersoid and gloss oil for plastic film and preparation method thereof |
| CN111087512A (en) * | 2019-10-18 | 2020-05-01 | 江苏富琪森新材料有限公司 | Acrylic emulsion for PET film coating material and preparation method thereof |
| CN111187387A (en) * | 2019-12-11 | 2020-05-22 | 广东东方一哥新材料股份有限公司 | Metal anticorrosion emulsion and preparation method thereof |
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