Processing method of holographic transfer printing positioning embossed lining paper

Abstract

The invention discloses a processing method of holographic transfer printing positioning embossed lining paper. The processing method comprises the following steps: S1, base material pretreatment: carrying out plasma treatment on a selected paper base material; s2, base material coating, wherein one side of the paper base material subjected to plasma treatment is coated with a nano coating, and a nano coating is obtained; s3, holographic transfer printing, wherein the holographic image-text on the nickel plate is transferred to the nano coating through mold pressing to obtain a hologram layer; s4, printing: spraying dilute acid liquid on the hologram layer, and then printing ink paint on the information layer sprayed with the dilute acid liquid to obtain an ink layer; s5, knurling treatment is conducted, specifically, knurling treatment is conducted on the printed paper base material; s6, antibacterial treatment: spraying an antibacterial coating on the ink layer subjected to embossing treatment to form an antibacterial coating; and S7, slitting and packaging. According to the process technology, the anti-counterfeiting performance of the product is improved, and the phenomenon of counterfeiting or imitation is avoided; and the production quality of products is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of product packaging materials, and particularly relates to a processing method of holographic transfer printing positioning embossed liner paper. Background Art

[0002] Liner paper is a type of paper used inside packaging. It's typically made from aluminum foil, a material that effectively prevents wrinkles and has a tendency to recover. Liner paper is primarily used in cigarette packaging to prevent wrinkles and protect the product from damage. Furthermore, within the inner packaging, lining paper can enhance the product's overall aesthetics. The general production process for lining paper includes base paper production, coating, laminating, printing, and embossing. Embossing refers to the formation of a concave and convex pattern on the surface of the lining paper to improve its folding properties and aesthetics. During use, lining paper produced using this production process has been found to: First, directly printing ink on the paper substrate without pre-treatment results in low adhesion and poor ink-to-paper bonding. Furthermore, existing inks have low viscosity and high fluidity, leading to severe dispersion after printing, which can seriously affect print quality and hinder drying, significantly impacting production efficiency. Second, existing lining paper lacks anti-counterfeiting technology, making it a frequent target for counterfeiting and imitation during use. Therefore, it is an objective need to develop a processing method for holographic transfer printing positioning embossed lining paper which has a reasonable method, low processing cost, can improve product quality and improve product anti-counterfeiting performance. Summary of the Invention

[0003] In order to solve the technical problems in the background technology of poor bonding ability between ink and paper substrate, poor environmental performance and insufficient anti-counterfeiting ability, the purpose of the present invention is to provide a method for processing holographic transfer printing positioning embossed liner paper with a reasonable method, low processing cost, and the ability to improve product quality and product anti-counterfeiting performance.

[0004] The processing method of the holographic transfer printing positioning embossed liner paper of the present invention is carried out according to the following steps: Substrate pretreatment: Plasma treatment is performed on the selected paper substrate to increase the surface adhesion of the paper substrate to more than 50mN / m. The power of the plasma treatment is 5-10Kw, the frequency is 40kHz, and the air pressure is 600-1000kPa; S2. Substrate coating: coating one side of the plasma-treated paper substrate with a nano coating to obtain a nano coating, and then drying the nano coating. The coating amount of the nano coating is 3-5 g / m², the coating speed is 75-85 m / min, and the drying temperature of the nano coating is 100-140°C. S3. Holographic transfer: The pre-designed holographic pattern is copied onto a nickel plate using electron beam etching technology. The holographic pattern on the nickel plate is then transferred to the nanocoating by molding to obtain a holographic layer. The molding temperature of the holographic layer is 80-100°C and the molding pressure is 6-8 MPa. The holographic layer is then fixed by UV light curing, with a resolution of 5000 dpi. The UV light curing wavelength is 360-380 nm and the energy is 800-850 mJ / cm². S4 printing: Spray dilute acid on the holographic layer, then print ink on the information layer sprayed with dilute acid to obtain an ink layer, dry the ink layer, and cool it down after drying. The ink printing pressure is 700-800N, the printing speed is 100-120m / min, the ink dosage is 1.5-2g / m², the drying temperature of the ink layer is 60-70℃, and the cooling is done by air cooling. S5. Embossing treatment: Emboss the printed paper substrate with a preheating temperature of 60-80°C and an embossing pressure of 5-15N / mm². S6. Antibacterial treatment: spray antibacterial coating on the embossed ink layer to form an antibacterial coating. The amount of antibacterial coating is 0.8-1g / m². S7. Cutting and packaging: The paper substrate after antibacterial treatment is cut and packaged to obtain the finished product.

[0005] Compared with the existing technology: the advantages of the present invention are: First, before holographic transfer, the paper substrate is first subjected to plasma treatment and nano-coating treatment. This can improve the adhesion of the paper substrate and allow the holographic image to be completely transferred to the paper substrate after molding. This can effectively improve the transfer quality of the holographic image. At the same time, transferring the holographic image to the paper substrate can improve the anti-counterfeiting performance of the product and avoid the phenomenon of forgery or imitation. Secondly, the present invention adds an acid spraying step on the holographic layer before printing the ink coating. This can reduce the viscosity of the ink coating, improve the fluidity of the ink coating, and allow the ink coating to fully bond with the holographic layer, greatly improving the firmness of the bond between the ink layer and the holographic layer, avoiding the appearance of ink falling during use, and effectively improving production quality. At the same time, after the acid spraying is carried out before the ink printing, the pH value of the ink coating will slowly decrease after contact with the dilute acid solution, and the viscosity of the ink coating will gradually increase, which can improve drying efficiency and avoid the problem of poor printing quality caused by the diffusion of the highly fluid ink coating. This can improve drying efficiency while improving printing quality. The improved drying efficiency can also reduce drying time and temperature for subsequent drying, which plays a role in energy saving. In addition, by improving the ink coating formula, the present invention can effectively improve the adhesion of the ink itself, further improve the bonding ability of the ink coating with the holographic layer, and thus significantly improve the firmness of the lining paper, thereby improving the production quality of the product. The present device has the advantages of reasonable method, easy operation, good product quality, and good anti-counterfeiting effect, and is easy to promote and use. DETAILED DESCRIPTION

[0006] The present invention will be further described below with reference to the embodiments, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention shall fall within the scope of protection of the present invention. Example 1

[0007] The method for processing the holographic transfer printing positioning embossed liner paper described in Example 1 is carried out according to the following steps: S1. Substrate pretreatment: Plasma treatment is performed on the selected paper substrate to increase the surface adhesion of the paper substrate to above 50mN / m. The power of the plasma treatment is 5kW, the frequency is 40kHz, and the air pressure is 600kPa. Plasma treatment can improve the adhesion of the paper substrate and improve the adhesion between the paper substrate and the nano-layer. S2. Substrate Coating: A nanocoating is applied to one side of a plasma-treated paper substrate to obtain a nanocoating. The nanocoating is then dried. The coating weight is 3 g / m², the coating speed is 75 m / min, and the drying temperature is 100°C. The nanocoating is made of a water-based acrylic resin and nano-SiO2 in a mass ratio of 30:1. The dried nanocoating forms a microporous structure that enhances the adhesion of the subsequent holographic layer transfer. S3. Holographic transfer: The pre-designed holographic image is copied onto the nickel plate using electron beam etching technology. The holographic image on the nickel plate is then transferred to the nano-coating by molding to obtain a holographic layer. The molding temperature of the holographic layer is 80°C and the molding pressure is 6MPa. The holographic layer is then fixed by UV light curing, so that the resolution of the holographic layer reaches 5000dpi. The wavelength of UV light curing is 360nm and the energy is 800mJ / cm². The transfer of the holographic image on the nickel plate to the nano-coating by molding can greatly improve the quality of information transfer on the nickel plate. The use of UV light curing can ensure the clarity and integrity of the holographic image. S4 printing: spraying dilute acid on the holographic layer. No specific pattern is required in this process. Only the dilute acid is sprayed according to the area to be printed. Then, ink coating is printed on the information layer sprayed with dilute acid to obtain an ink layer. The pH value of the dilute acid is less than 1. It is prepared by using ordinary hydrochloric acid and the ink layer is dried. After drying, the ink coating printing pressure is 700N, the printing speed is 100m / min, the amount of ink coating is 1.5g / m², the drying temperature of the ink layer is 60℃, and the cooling is carried out by air cooling. The ink coating is a raw material in parts by weight. : 30 parts of sulfonated polyester resin, 20 parts of pigment, 1 part of graphene, 3 parts of glycerol, 3 parts of vegetable oil, 4 parts of fatty acid methyl ester, 1 part of dispersant, 0.2 parts of antioxidant, 0.5 parts of defoamer, the vegetable oil is soybean oil, the dispersant is a metal soap substance, the defoamer is tributyl phosphate, the pigment is carbon black, and the antioxidant is tea polyphenol; using graphene, sulfonated polyester resin, pigment, glycerol, etc. as the main raw materials of ink coating can improve the adhesion of ink and modify the dispersion performance of ink during the printing process, while enhancing the aging resistance of the lining paper, and obtaining higher quality printing effect; S5. Embossing treatment: Emboss the printed paper substrate with a preheating temperature of 60°C and an embossing pressure of 5N / mm². S6. Antibacterial treatment: Spray antibacterial coating on the embossed ink layer to form an antibacterial coating. The amount of antibacterial coating is 0.8g / m². The antibacterial coating is a polyvinyl alcohol solution containing 1% nanosilver. After antibacterial treatment, the antibacterial rate of the lining paper can be improved, preventing the lining paper from being infected by bacteria, thereby extending the service life of the lining paper. S7. Cutting and packaging: The paper substrate after antibacterial treatment is cut and packaged to obtain the finished product. Example 2

[0008] The method for processing the holographic transfer printing positioning embossed liner paper described in Example 2 is carried out according to the following steps: S1. Substrate pretreatment: Plasma treatment is performed on the selected paper substrate to increase the surface adhesion of the paper substrate to above 50mN / m. The power of the plasma treatment is 8kW, the frequency is 40kHz, and the air pressure is 800kPa. Plasma treatment can improve the adhesion of the paper substrate and improve the adhesion between the paper substrate and the nano-layer. S2. Substrate Coating: A nanocoating is applied to one side of a plasma-treated paper substrate to form a nanocoating. The nanocoating is then dried. The coating weight is 4 g / m², the coating speed is 80 m / min, and the drying temperature is 120°C. The nanocoating is made of a water-based acrylic resin and nano-SiO2 in a mass ratio of 40:1. The dried nanocoating forms a microporous structure that enhances the adhesion of the subsequent holographic layer transfer. S3. Holographic transfer: The pre-designed holographic image is copied onto the nickel plate using electron beam etching technology. The holographic image on the nickel plate is then transferred to the nano-coating by molding to obtain a holographic layer. The molding temperature of the holographic layer is 90°C and the molding pressure is 7MPa. The holographic layer is then fixed by UV light curing, so that the resolution of the holographic layer reaches 5000dpi. The wavelength of UV light curing is 370nm and the energy is 830mJ / cm². The transfer of the holographic image on the nickel plate to the nano-coating by molding can greatly improve the quality of information transfer on the nickel plate. The use of UV light curing can ensure the clarity and integrity of the holographic image. S4 printing: spraying dilute acid on the holographic layer. No specific pattern is required in this process. Only the dilute acid is sprayed according to the area to be printed. Then, ink coating is printed on the information layer sprayed with dilute acid to obtain an ink layer. The pH value of the dilute acid is less than 1. It is prepared by using ordinary hydrochloric acid and the ink layer is dried. After drying, the ink coating printing pressure is 750N, the printing speed is 110m / min, the amount of ink coating is 1.8g / m², the drying temperature of the ink layer is 65℃, and the cooling is carried out by air cooling. The ink coating is made of raw materials in parts by weight: sulfonated 35 parts of polyester resin, 23 parts of pigment, 1.5 parts of graphene, 4 parts of glycerol, 4 parts of vegetable oil, 8 parts of fatty acid methyl ester, 2 parts of dispersant, 0.5 parts of antioxidant, and 0.8 parts of defoamer, wherein the vegetable oil is peanut oil, the dispersant is a metal soap substance, the defoamer is an organosilicon emulsion, the pigment is phthalocyanine blue, and the antioxidant is tert-butyldiphenol; using graphene, sulfonated polyester resin, pigment, glycerol, etc. as the main raw materials of ink coating can improve the adhesion of ink and modify the dispersibility of ink during the printing process, while enhancing the aging resistance of the lining paper, thereby obtaining a higher quality printing effect; S5. Embossing treatment: Emboss the printed paper substrate with a preheating temperature of 70°C and an embossing pressure of 10N / mm². S6. Antibacterial treatment: Spray antibacterial coating on the embossed ink layer to form an antibacterial coating. The dosage of the antibacterial coating is 0.9g / m². The antibacterial coating is a polyvinyl alcohol solution containing 1% nanosilver. The antibacterial treatment can improve the antibacterial rate of the lining paper, prevent the lining paper from being infected by bacteria, and thus extend the service life of the lining paper. S7. Cutting and packaging: The paper substrate after antibacterial treatment is cut and packaged to obtain the finished product. Example 3

[0009] The method for processing the holographic transfer printing positioning embossed liner paper described in Example 3 is carried out according to the following steps: S1. Substrate pretreatment: Plasma treatment is performed on the selected paper substrate to increase the surface adhesion of the paper substrate to above 50mN / m. The power of the plasma treatment is 10KW, the frequency is 40kHz, and the air pressure is 1000kPa. Plasma treatment can improve the adhesion of the paper substrate and improve the adhesion between the paper substrate and the nano-layer. S2. Substrate Coating: A nanocoating is applied to one side of a plasma-treated paper substrate to form a nanocoating. The nanocoating is then dried. The coating weight is 5 g / m², the coating speed is 85 m / min, and the drying temperature is 140°C. The nanocoating is made of a water-based acrylic resin and nano-SiO2 in a mass ratio of 50:1. The dried nanocoating forms a microporous structure that enhances the adhesion of the subsequent holographic layer transfer. S3. Holographic transfer: The pre-designed holographic image is copied onto the nickel plate using electron beam etching technology. The holographic image on the nickel plate is then transferred to the nano-coating by molding to obtain a holographic layer. The molding temperature of the holographic layer is 100°C and the molding pressure is 8MPa. The holographic layer is then fixed by UV light curing, so that the resolution of the holographic layer reaches 5000dpi. The wavelength of UV light curing is 380nm and the energy is 850mJ / cm². The transfer of the holographic image on the nickel plate to the nano-coating by molding can greatly improve the quality of information transfer on the nickel plate. The use of UV light curing can ensure the clarity and integrity of the holographic image. S4 printing: spraying dilute acid on the holographic layer. No specific pattern is required in this process. Only the dilute acid is sprayed according to the area to be printed. Then, ink coating is printed on the information layer sprayed with dilute acid to obtain an ink layer. The pH value of the dilute acid is less than 1. It is prepared by ordinary hydrochloric acid and the ink layer is dried. After drying, the ink coating printing pressure is 800N, the printing speed is 120m / min, the amount of ink coating is 2g / m², the drying temperature of the ink layer is 70℃, and the cooling is carried out by air cooling. The ink coating is made of the following raw materials in parts by weight: 40 parts of sulfonated polyester resin, 25 parts of pigment, 2 parts of graphene 6 parts, glycerin, 5 parts of vegetable oil, 10 parts of fatty acid methyl ester, 3 parts of dispersant, 1 part of antioxidant, 1 part of defoaming agent, wherein the vegetable oil is corn oil, sunflower oil and tung oil, the dispersant is a metal soap substance, the defoaming agent is polyether modified polysiloxane, the pigments are permanent yellow GG, direct red 83 and titanium chrome green, and the antioxidants are tocopherol, flavonoids, butylated hydroxyanisole and butylated hydroxytoluene; using graphene, sulfonated polyester resin, pigment, glycerin, etc. as the main raw materials of ink coating can improve the adhesion of ink and modify the dispersibility of ink during the printing process, while enhancing the aging resistance of the lining paper, thereby obtaining a higher quality printing effect; S5. Embossing treatment: Emboss the printed paper substrate with a preheating temperature of 80°C and an embossing pressure of 15N / mm². S6. Antibacterial treatment: Spray antibacterial coating on the embossed ink layer to form an antibacterial coating. The dosage of the antibacterial coating is 1g / m². The antibacterial coating is a polyvinyl alcohol solution containing 1% nanosilver. The antibacterial treatment can improve the antibacterial rate of the lining paper, prevent the lining paper from being infected by bacteria, and thus extend the service life of the lining paper. S7. Cutting and packaging: The paper substrate after antibacterial treatment is cut and packaged to obtain the finished product.

[0010] The manufacturing processes of Examples 1 to 3 are reasonable. By improving the manufacturing process, on the one hand, the anti-counterfeiting performance of the product is improved, avoiding the occurrence of forgery or imitation; on the other hand, the firmness of the bond between the ink layer and the holographic layer is improved, avoiding the occurrence of ink falling during use, which can effectively improve the production quality of the product. After the products are used, the customer recognition and praise rate are high.

Claims

1. A method for processing holographic transfer printing positioning embossed lining paper, characterized in that: Follow these steps: S1. Substrate pretreatment: Plasma treatment is performed on the selected paper substrate to increase the surface adhesion of the paper substrate to more than 50mN / m. The power of the plasma treatment is 5-10Kw, the frequency is 40kHz, and the pressure is 600-1000kPa; S2. Substrate coating: coating one side of the plasma-treated paper substrate with a nano coating to obtain a nano coating, and then drying the nano coating. The coating amount of the nano coating is 3-5 g / m², the coating speed is 75-85 m / min, and the drying temperature of the nano coating is 100-140°C. S3. Holographic transfer: The pre-designed holographic pattern is copied onto a nickel plate using electron beam etching technology. The holographic pattern on the nickel plate is then transferred to the nanocoating by molding to obtain a holographic layer. The molding temperature of the holographic layer is 80-100°C and the molding pressure is 6-8 MPa. The holographic layer is then fixed by UV light curing, with a resolution of 5000 dpi. The UV light curing wavelength is 360-380 nm and the energy is 800-850 mJ / cm². S4 printing: Spray dilute acid on the holographic layer, then print ink on the information layer sprayed with dilute acid to obtain an ink layer, dry the ink layer, and cool it down after drying. The ink printing pressure is 700-800N, the printing speed is 100-120m / min, the ink dosage is 1.5-2g / m², the drying temperature of the ink layer is 60-70℃, and the cooling is done by air cooling. S5. Embossing treatment: Emboss the printed paper substrate with a preheating temperature of 60-80°C and an embossing pressure of 5-15N / mm². S6. Antibacterial treatment: spray antibacterial coating on the embossed ink layer to form an antibacterial coating. The amount of antibacterial coating is 0.8-1g / m²; S7. Cutting and packaging: The paper substrate after antibacterial treatment is cut and packaged to obtain the finished product.

2. The method for processing holographic transfer printing positioning embossed liner paper according to claim 1, characterized in that: In step S2, the nano coating is prepared by using water-based acrylic resin and nano-SiO2, and the mass ratio of the water-based acrylic resin to the nano-SiO2 is 30-50:

1.

3. The method for processing holographic transfer printing positioning embossed liner paper according to claim 1, characterized in that: In step S4, the ink coating is composed of the following raw materials in parts by weight: 30 to 40 parts of sulfonated polyester resin, 20 to 25 parts of pigment, 1 to 2 parts of graphene, 3 to 6 parts of glycerol, 3 to 5 parts of vegetable oil, 4 to 10 parts of fatty acid methyl ester, 1 to 3 parts of dispersant, 0.2 to 1 part of antioxidant, and 0.5 to 1 part of defoaming agent.

4. The method for processing holographic transfer printing positioning embossed liner paper according to claim 3, characterized in that: The vegetable oil is at least one of soybean oil, corn oil, sunflower oil, tung oil and peanut oil.

5. The method for processing holographic transfer printing positioning embossed liner paper according to claim 4, characterized in that: The dispersant is a metal soap substance.

6. The method for processing holographic transfer printing positioning embossed liner paper according to claim 4, characterized in that: The defoaming agent is at least one of tributyl phosphate, polyether-modified polysiloxane, and silicone emulsion.

7. The method for processing holographic transfer printing positioning embossed liner paper according to claim 4, characterized in that: The pigment is at least one of carbon black, permanent yellow GG, direct red 83, titanium chrome green, and phthalocyanine blue.

8. The method for processing holographic transfer printing positioning embossed liner paper according to claim 4, characterized in that: The antioxidant is at least one of tea polyphenols, tocopherol, flavonoids, butylated hydroxyanisole, butylated hydroxytoluene, and tert-butylated diphenol.

9. The method for processing holographic transfer printing positioning embossed liner paper according to claim 1, characterized in that: In step S6: the antibacterial coating is a polyvinyl alcohol solution containing 1% nanosilver.