Waterproof packaging carton color printing production process

Abstract

The invention discloses a color printing production process for a waterproof packaging carton. Comprising the following steps: preparation of printing ink: uniformly mixing deionized water, waterborne acrylate resin, waterborne polyurethane emulsion, ultra-high molecular weight polydimethylsiloxane, polyethylene glycol diacrylate, N-dimethylaminoethanol, 2-amino-2-methyl propanol and pigment according to a set mass part, and uniformly stirring to obtain the printing ink, wherein the printing ink is prepared by the following steps: uniformly mixing deionized water, waterborne acrylate resin, waterborne polyurethane emulsion, ultra-high molecular weight polydimethylsiloxane, polyethylene glycol diacrylate, N-dimethylaminoethanol, 2-amino-2-methyl propanol and pigment; the pH value of the printing ink is regulated to 8-9 by adopting a pH value regulator; and performing waterproof treatment on the ink. According to the waterproof packaging carton color printing production process, the water-based ink waterproof agent is added, and the waterproof performance of patterns printed by water-based ink is improved. And the used ultra-high molecular weight polydimethylsiloxane can improve the wear resistance of printed patterns. N-dimethylaminoethanol can reduce the minimum film forming temperature of the emulsion, and 2-amino-2-methyl propanol can accelerate the curing speed.

Description

Technical Field

[0001] The invention relates to a color printing production process for a waterproof packaging paper box, belonging to the technical field of printing. Background Art

[0002] With the development of modern science and technology, printing technology is no longer just for books. It also designs printing in many fields such as express packaging. With the application in different fields, the printing technology and the ink used for printing have been diversified. With the rapid development of logistics and express delivery in China, the use of cartons is also increasing. However, the rainy season and rainy days are a headache for express delivery and logistics. If the cartons are not waterproof, they will become soft and easily damaged once they are exposed to rain. In addition, if the color-printed packaging carton is exposed to rain, the printed pattern will be blurred. The usual practice is to apply a layer of waterproof coating on the outside of the pattern, but this method has one more process and increases the production cost. How to study a waterproof packaging carton color printing production process has become a problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a waterproof packaging paper box color printing production process, which adopts waterproof water-based ink to make the prepared color printed packaging paper box have a waterproof effect.

[0004] To solve the above technical problems, the purpose of the present invention is achieved as follows:

[0005] The present invention relates to a waterproof packaging paper box color printing production process, which is characterized by comprising the following steps:

[0006] S2. Preparation of ink: Deionized water, aqueous acrylic resin, aqueous polyurethane emulsion, ultra-high molecular weight polydimethylsiloxane, polyethylene glycol diacrylate, N-dimethylaminoethanol, 2-amino-2-methylpropanol, and pigment are uniformly mixed according to set mass fractions, and a pH value adjuster is used to adjust the pH value of the ink to 8-9;

[0007] S2. Waterproofing treatment of ink: adding 3-5% of water-based ink waterproofing agent to the prepared ink and stirring evenly to obtain waterproof water-based ink;

[0008] S3, surface treatment of the packaging paper box: N-trimethyl chitosan, lactic acid, water-based amino resin and deionized water are uniformly stirred, injected into a high-pressure spray gun, and uniformly sprayed on the surface of the packaging paper box to be printed, and dried at high temperature and reduced pressure to obtain a packaging paper box to be printed;

[0009] S4. Debugging of printing press: Debug the parameters of printing press according to the paper to be printed and prepare for printing;

[0010] S5. Printing: injecting the prepared waterproof water-based ink of various colors into a printing machine for printing, drying at high temperature and normal pressure, and irradiating with ultraviolet light at the same time, and then obtaining a packaging paper box print.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the ink includes 100 parts by mass of deionized water, 10-15 parts by mass of aqueous acrylic resin, 5-10 parts by mass of aqueous polyurethane emulsion, 3-5 parts by mass of ultra-high molecular weight polydimethylsiloxane, 3-5 parts by mass of polyethylene glycol diacrylate, 5-8 parts by mass of N-dimethylaminoethanol, 5-10 parts by mass of 2-amino-2-methylpropanol and an appropriate amount of pigment.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: the preparation process of the aqueous polyurethane emulsion is as follows:

[0013] First, remove water from polytetrahydrofuran diol and 1,4-butanediol at 80°C under reduced pressure and vacuum conditions for later use;

[0014] The isocyanate index was determined to be 0.9, polytetrahydrofuran diol, 1,4-butanediol, isophorone diisocyanate, and dimethylol propionic acid were added to a three-necked flask equipped with a reflux condenser, a nitrogen protection device, and an electric stirrer, and N,N-dimethylacetamide was added as a solvent. The mixture was stirred in a constant temperature oil bath at 60°C for 0.5h, then the temperature was raised to 80°C, and the catalyst dibutyltin dilaurate was added. The mixture was reacted at 80°C and 360r / min for 1h. Trimethylolpropane, monolaurin, and anthraquinone compounds were added and the reaction was continued for 1h until the NCO content reached the theoretical value. The mixture was cooled to 40°C, and an appropriate amount of acetone was added to adjust the viscosity of the system. A measured amount of triethylamine was added for neutralization, and then water was added for dispersion and emulsification under high-speed stirring. The acetone was removed by vacuum distillation to obtain an aqueous polyurethane emulsion.

[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: the molecular weight of the water-based acrylic resin is controlled between 6000-15000.

[0016] On the basis of the above scheme and as a preferred scheme of the above scheme: the pigment is a mixture of one or more of carbon black, titanium dioxide, iron red, phthalocyanine blue, and lead chrome yellow.

[0017] The beneficial effects of the present invention are as follows: the present invention relates to a waterproof packaging paper box color printing production process, adding a water-based ink waterproofing agent to improve the waterproof performance of the pattern printed by the water-based ink. The ultra-high molecular weight polydimethylsiloxane used can improve the wear resistance of the printed pattern. N-dimethylaminoethanol can reduce the minimum film-forming temperature of the emulsion, and 2-amino-2-methylpropanol can accelerate the curing speed. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments.

[0019] Embodiment 1

[0020] A waterproof packaging paper box color printing production process involved in this embodiment includes the following steps:

[0021] S2. Preparation of ink: The ink is prepared by uniformly mixing deionized water, aqueous acrylic resin, aqueous polyurethane emulsion, ultra-high molecular weight polydimethylsiloxane, polyethylene glycol diacrylate, N-dimethylaminoethanol, 2-amino-2-methylpropanol and pigment according to set weight fractions, and adjusting the pH value of the ink to 8-9 with a pH adjuster.

[0022] Furthermore, the ink includes 100 parts by mass of deionized water, 10-15 parts by mass of water-based acrylic resin, 5-10 parts by mass of water-based polyurethane emulsion, 3-5 parts by mass of ultra-high molecular weight polydimethylsiloxane, 3-5 parts by mass of polyethylene glycol diacrylate, 5-8 parts by mass of N-dimethylaminoethanol, 5-10 parts by mass of 2-amino-2-methylpropanol and an appropriate amount of pigment. The molecular weight of the water-based acrylic resin is controlled between 6000 and 15000.

[0023] In this embodiment, the ink includes 100 parts by mass of deionized water, 10 parts by mass of aqueous acrylic resin, 10 parts by mass of aqueous polyurethane emulsion, 3 parts by mass of ultra-high molecular weight polydimethylsiloxane, 5 parts by mass of polyethylene glycol diacrylate, 5 parts by mass of N-dimethylaminoethanol, 10 parts by mass of 2-amino-2-methylpropanol and 5 parts by mass of pigment. The pigment is a mixture of one or more of carbon black, titanium dioxide, iron red, phthalocyanine blue and lead chrome yellow. The color of the pigment is selected according to the color type of the actual printed pattern.

[0024] Further, the preparation process of the aqueous polyurethane emulsion is as follows:

[0025] First, remove water from polytetrahydrofuran diol and 1,4-butanediol at 80°C under reduced pressure and vacuum conditions for later use;

[0026] The isocyanate index was determined to be 0.9, polytetrahydrofuran diol, 1,4-butanediol, isophorone diisocyanate, and dimethylol propionic acid were added to a three-necked flask equipped with a reflux condenser, a nitrogen protection device, and an electric stirrer, and N,N-dimethylacetamide was added as a solvent. The mixture was stirred in a constant temperature oil bath at 60°C for 0.5h, then the temperature was raised to 80°C, and the catalyst dibutyltin dilaurate was added. The mixture was reacted at 80°C and 360r / min for 1h. Trimethylolpropane, monolaurin, and anthraquinone compounds were added and the reaction was continued for 1h until the NCO content reached the theoretical value. The mixture was cooled to 40°C, and an appropriate amount of acetone was added to adjust the viscosity of the system. A measured amount of triethylamine was added for neutralization, and then water was added for dispersion and emulsification under high-speed stirring. The acetone was removed by vacuum distillation to obtain an aqueous polyurethane emulsion.

[0027] S2. Waterproof treatment of ink: add 3% water-based ink waterproofing agent to the prepared ink and stir evenly to obtain waterproof water-based ink. The water-based ink waterproofing agent is selected as water-based ink waterproofing agent ADS3W6024, and the water-based ink waterproofing agent is water-soluble, environmentally friendly, non-ionic, acid-resistant, alkali-resistant, hard water-resistant, highly water-soluble and emulsion-stable.

[0028] S3, surface treatment of the packaging paper box: N-trimethyl chitosan, lactic acid, aqueous amino resin and deionized water are uniformly stirred, injected into a high-pressure spray gun, and uniformly sprayed on the surface of the packaging paper box to be printed, and dried at high temperature and reduced pressure to obtain a packaging paper box to be printed. Specifically in this embodiment, N-trimethyl chitosan, lactic acid, aqueous amino resin and deionized water are uniformly mixed in a ratio of 5 parts by mass, 10 parts by mass, 20 parts by mass and 50 parts by mass.

[0029] S4. Debugging of printing press: Debug the parameters of printing press according to the paper to be printed and prepare for printing.

[0030] S5. Printing: Inject the prepared waterproof water-based ink of various colors into a printing machine to print according to a set pattern, dry at high temperature and normal pressure, and irradiate with ultraviolet light at the same time, and then obtain a packaging paper box print.

[0031] Embodiment 2

[0032] A waterproof packaging paper box color printing production process involved in this embodiment includes the following steps:

[0033] S2. Preparation of ink: The ink is prepared by uniformly mixing deionized water, aqueous acrylic resin, aqueous polyurethane emulsion, ultra-high molecular weight polydimethylsiloxane, polyethylene glycol diacrylate, N-dimethylaminoethanol, 2-amino-2-methylpropanol and pigment according to set weight fractions, and adjusting the pH value of the ink to 8-9 with a pH adjuster.

[0034] Furthermore, the ink includes 100 parts by mass of deionized water, 10-15 parts by mass of water-based acrylic resin, 5-10 parts by mass of water-based polyurethane emulsion, 3-5 parts by mass of ultra-high molecular weight polydimethylsiloxane, 3-5 parts by mass of polyethylene glycol diacrylate, 5-8 parts by mass of N-dimethylaminoethanol, 5-10 parts by mass of 2-amino-2-methylpropanol and an appropriate amount of pigment. The molecular weight of the water-based acrylic resin is controlled between 6000 and 15000.

[0035] In this embodiment, the ink includes 100 parts by mass of deionized water, 15 parts by mass of aqueous acrylic resin, 5 parts by mass of aqueous polyurethane emulsion, 5 parts by mass of ultra-high molecular weight polydimethylsiloxane, 3 parts by mass of polyethylene glycol diacrylate, 8 parts by mass of N-dimethylaminoethanol, 5 parts by mass of 2-amino-2-methylpropanol and 5 parts by mass of pigment. The pigment is a mixture of one or more of carbon black, titanium dioxide, iron red, phthalocyanine blue and lead chrome yellow. The color of the pigment is selected according to the color type of the actual printed pattern.

[0036] Further, the preparation process of the aqueous polyurethane emulsion is as follows:

[0037] First, remove water from polytetrahydrofuran diol and 1,4-butanediol at 80°C under reduced pressure and vacuum conditions for later use;

[0038] The isocyanate index was determined to be 0.9, polytetrahydrofuran diol, 1,4-butanediol, isophorone diisocyanate, and dimethylol propionic acid were added to a three-necked flask equipped with a reflux condenser, a nitrogen protection device, and an electric stirrer, and N,N-dimethylacetamide was added as a solvent. The mixture was stirred in a constant temperature oil bath at 60°C for 0.5h, then the temperature was raised to 80°C, and the catalyst dibutyltin dilaurate was added. The mixture was reacted at 80°C and 360r / min for 1h. Trimethylolpropane, monolaurin, and anthraquinone compounds were added and the reaction was continued for 1h until the NCO content reached the theoretical value. The mixture was cooled to 40°C, and an appropriate amount of acetone was added to adjust the viscosity of the system. A measured amount of triethylamine was added for neutralization, and then water was added for dispersion and emulsification under high-speed stirring. The acetone was removed by vacuum distillation to obtain an aqueous polyurethane emulsion.

[0039] S2. Waterproof treatment of ink: add 3% water-based ink waterproofing agent to the prepared ink and stir evenly to obtain waterproof water-based ink. The water-based ink waterproofing agent is selected as water-based ink waterproofing agent ADS3W6024, and the water-based ink waterproofing agent is water-soluble, environmentally friendly, non-ionic, acid-resistant, alkali-resistant, hard water-resistant, highly water-soluble and emulsion-stable.

[0040] S3, surface treatment of the packaging paper box: N-trimethyl chitosan, lactic acid, aqueous amino resin and deionized water are uniformly stirred, injected into a high-pressure spray gun, and uniformly sprayed on the surface of the packaging paper box to be printed, and dried at high temperature and reduced pressure to obtain a packaging paper box to be printed. Specifically in this embodiment, N-trimethyl chitosan, lactic acid, aqueous amino resin and deionized water are uniformly mixed in a ratio of 10 parts by mass, 15 parts by mass, 25 parts by mass and 50 parts by mass.

[0041] S4. Debugging of printing press: Debug the parameters of printing press according to the paper to be printed and prepare for printing.

[0042] S5. Printing: Inject the prepared waterproof water-based ink of various colors into a printing machine to print according to a set pattern, dry at high temperature and normal pressure, and irradiate with ultraviolet light at the same time, and then obtain a packaging paper box print.

[0043] The waterproof test was conducted on the packaging paper boxes prepared in Example 1 and Example 2, and both achieved good waterproof performance. When water was sprinkled on the printed surface, it would slide off the surface without forming water drops.

[0044] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A waterproof packaging paper box color printing production process, characterized in that: The steps include: S2. Preparation of ink: Deionized water, aqueous acrylic resin, aqueous polyurethane emulsion, ultra-high molecular weight polydimethylsiloxane, polyethylene glycol diacrylate, N-dimethylaminoethanol, 2-amino-2-methylpropanol, and pigment are uniformly mixed according to set mass fractions, and a pH value adjuster is used to adjust the pH value of the ink to 8-9; S2. Waterproofing treatment of ink: adding 3-5% of water-based ink waterproofing agent to the prepared ink and stirring evenly to obtain waterproof water-based ink; S3, surface treatment of the packaging paper box: N-trimethyl chitosan, lactic acid, water-based amino resin and deionized water are uniformly stirred, injected into a high-pressure spray gun, and uniformly sprayed on the surface of the packaging paper box to be printed, and dried at high temperature and reduced pressure to obtain a packaging paper box to be printed; S4. Debugging of printing press: Debug the parameters of printing press according to the paper to be printed and prepare for printing; S5. Printing: injecting the prepared waterproof water-based ink of various colors into a printing machine for printing, drying at high temperature and normal pressure, and irradiating with ultraviolet light at the same time, and then obtaining a packaging paper box print.

2. A waterproof packaging paper box color printing production process according to claim 1, characterized in that: The ink comprises 100 parts by mass of deionized water, 10-15 parts by mass of aqueous acrylic resin, 5-10 parts by mass of aqueous polyurethane emulsion, 3-5 parts by mass of ultra-high molecular weight polydimethylsiloxane, 3-5 parts by mass of polyethylene glycol diacrylate, 5-8 parts by mass of N-dimethylaminoethanol, 5-10 parts by mass of 2-amino-2-methylpropanol and an appropriate amount of pigment.

3. The waterproof packaging paper box color printing production process according to claim 1 is characterized in that: The preparation process of the aqueous polyurethane emulsion is as follows: First, remove water from polytetrahydrofuran diol and 1,4-butanediol at 80°C under reduced pressure and vacuum conditions for later use; The isocyanate index was determined to be 0.9, polytetrahydrofuran diol, 1,4-butanediol, isophorone diisocyanate, and dimethylol propionic acid were added to a three-necked flask equipped with a reflux condenser, a nitrogen protection device, and an electric stirrer, and N,N-dimethylacetamide was added as a solvent. The mixture was stirred in a constant temperature oil bath at 60°C for 0.5h, then the temperature was raised to 80°C, and the catalyst dibutyltin dilaurate was added. The mixture was reacted at 80°C and 360r / min for 1h. Trimethylolpropane, monolaurin, and anthraquinone compounds were added and the reaction was continued for 1h until the NCO content reached the theoretical value. The mixture was cooled to 40°C, and an appropriate amount of acetone was added to adjust the viscosity of the system. A measured amount of triethylamine was added for neutralization, and then water was added for dispersion and emulsification under high-speed stirring. The acetone was removed by vacuum distillation to obtain an aqueous polyurethane emulsion.

4. A waterproof packaging paper box color printing production process according to claim 1, characterized in that: The molecular weight of the water-based acrylic resin is controlled between 6000 and 15000.

5. The waterproof packaging paper box color printing production process according to claim 1, characterized in that: The pigment is a mixture of one or more of carbon black, titanium dioxide, iron oxide red, phthalocyanine blue and lead chrome yellow.