Touch ink tipping paper and production process thereof

Abstract

The invention discloses touch ink tipping paper, which comprises a raw paper layer, the food-grade primer is pre-coated on the surface of the raw paper layer; the touch ink is printed on the upper side of the food-grade primer and comprises the following components in percentage by weight: 50-60% of waterborne polyurethane resin, 5-10% of food-grade silicon dioxide microspheres, 3-7% of nano cellulose, 8-12% of pearlescent pigment, 3-5% of polyethylene wax emulsion, 0.5-1% of auxiliaries and the balance of deionized water. The food-grade silicon dioxide microspheres provide the touch feeling, the microspheres with the diameters of 20 micrometers provide the fine and smooth frosted feeling, and the microspheres with the diameters of 50 micrometers are rougher. And the polyethylene wax improves the smoothness and enhances the dry and comfortable touch feeling. The touch printing ink is prepared from the food-grade silicon dioxide microspheres and the polyethylene wax emulsion, so that the touch feeling is improved, the sensory enjoyment of a smoker is enhanced, and meanwhile, the touch printing ink is suitable for food contact and is safe and stable; in addition, the pearlescent pigment provides a metal pearlescent effect and can be matched with touch to enhance the anti-counterfeiting characteristic.

Description

Technical Field

[0001] The present invention belongs to the field of cigarette tipping paper, and specifically relates to a tactile ink tipping paper and its production process. Background Art

[0002] With the improvement of people's living standards, smokers are increasingly pursuing the sensory enjoyment given by cigarettes. At present, tipping paper is generally printed and formed on paper-based materials using ink technology. Although it has diverse colors, it is inevitable to cause aesthetic fatigue and affect the consumption quality. With the development of the economy, smokers have higher requirements for the functions of cigarettes. Ordinary smooth cigarette tipping paper can no longer meet the pursuits of young people nowadays. For the market, how to change the structure of cigarette tipping paper, improve the touch, enhance novelty, and strengthen anti-counterfeiting has become the top priority.

[0003] Therefore, a cigarette tipping paper printed with tactile ink is urgently needed to be studied. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a tactile ink tipping paper and its production process, avoiding the troubles of the single structure of the conventional cigarette tipping paper, the lack of surface touch that can be directly in contact with food, and insufficient anti-counterfeiting performance.

[0005] To solve the above technical problem, the present invention discloses a tactile ink tipping paper, comprising: Base paper layer; Food-grade primer pre-coated on the surface of the base paper layer; Tactile ink printed on the upper side of the food-grade primer. The tactile ink includes, by percentage: aqueous polyurethane resin: 50 - 60%, food-grade silica microspheres: 5 - 10%, nanocellulose: 3 - 7%, pearlescent pigment: 8 - 12%, polyethylene wax emulsion: 3 - 5%, additives: 0.5 - 1%, deionized water: the balance. The food-grade silica microspheres provide the touch, among which 20μm microspheres provide a delicate matte feeling, and 50μm ones are rougher. The polyethylene wax improves the smoothness and enhances the dry touch.

[0006] The present invention discloses a production process of the tactile ink tipping paper, comprising the following steps: S1. Preparation of tactile ink: S11. Resin activation, select aqueous polyurethane with a solid content of 40 - 50% and a pH value of 7 - 8, and place the aqueous polyurethane in an environment of 20 - 25°C 24 hours in advance to avoid uneven viscosity caused by low temperature; S12. Microsphere dispersion, provide food-grade silica microspheres with a particle size of 10 - 50μm, and pre-wet them with ethanol before use, and let them stand for 10 minutes to prevent scattering; S13. Preparation: Add water-based resin to a mixing tank, slowly add deionized water to account for 30% of the total amount, and stir at a low speed of 500-800 rpm for 5 minutes to initially reduce the viscosity; gradually add iron oxide red pigment to the resin-water mixture, increase the speed to 1200-1500 rpm, and disperse for 15-20 minutes until the fineness is ≤15μm; slowly add pre-wetted silica microspheres and nanocellulose to the system, simultaneously increase the speed to 2000-2500 rpm, and disperse for 30 minutes to ensure that the microspheres are evenly suspended; add leveling agent, defoamer, wetting agent and other additives in sequence, reduce the speed to 800 rpm, and stir for 10 minutes; filter and mature to obtain the tactile ink; S2. Base paper processing: S21. Pretreatment: cleaning the surface of the base paper to remove dust and static electricity; S21. Pre-apply food-grade primer at a temperature of 20-25°C and a humidity of 50-60% to improve ink adhesion. S3. Printing press printing: S31. Gravure inking: tactile ink is injected into the ink tank, the gravure roller is immersed in the ink tank, and the excess ink is scraped off by the reverse scraper, leaving only the ink in the cells; S32 ink transfer, the embossing roller presses the base paper after the primer is dried to the gravure roller at a pressure of 0.2-0.3MPa and a speed of 80-120m / min; S33 segmented drying, using hot air drying three-stage method to dry the tactile ink; S4. Cutting, punching and storage.

[0007] According to one embodiment of the present invention, in step S12, the ratio of food-grade silica microspheres to ethanol is 1:1.

[0008] According to one embodiment of the present invention, after adding the additive in step S13, deionized water is used to adjust the final viscosity to ensure that the ink completely flows out of the pores of the Tu-4 cup within 30-45 seconds at 25°C. The amount added each time is ≤2%, and the mixture is stirred for 5 minutes and then retested.

[0009] According to one embodiment of the present invention, in step S13, the ink is filtered with a 200-mesh filter to remove undispersed particles; and the ink is left to stand and mature for 24 hours to stabilize the system and avoid tactile stratification.

[0010] According to one embodiment of the present invention, the food-grade primer in step S21 is a water-based acrylic primer with a solid content of 5-8%.

[0011] According to one embodiment of the present invention, the reverse scraper angle in step S31 is 55-65°.

[0012] According to an embodiment of the present invention, in step S31, the cell depth of the gravure roll is 20-40 μm, and the tactile strength corresponds to 20 μm → 40 μm from deep to shallow.

[0013] According to an embodiment of the present invention, in S33, the three-stage drying method includes: the first stage, drying at 80 °C with a wind speed of 10 m / s for 3 seconds; the second stage, drying at 95 °C with a wind speed of 15 m / s for 5 seconds; the third stage, drying at 60 °C with a wind speed of 5 m / s for 2 seconds.

[0014] According to an embodiment of the present invention, the thickness of the tactile ink is 8-12 μm, and the tactile effect is positively correlated with the film thickness. Excessive thickness is prone to cracking.

[0015] Compared with the prior art, the present invention can achieve the following technical effects: By configuring the tactile ink with food-grade silica microspheres and polyethylene wax emulsion, the touch is improved, and the nanocellulose provides support to enhance the sensory enjoyment of the inhaler. At the same time, the tactile ink is suitable for food contact and has stable safety.

[0016] The pearlescent pigment provides a metallic pearlescent effect, which can cooperate with the touch itself to enhance the anti-counterfeiting property.

[0017] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned technical effects simultaneously. Detailed Embodiment [[ID=X]]

[0018] The following will be described in detail in conjunction with embodiments to fully understand how the present invention applies technical means to solve technical problems and achieve the realization process of technical effects, and to implement accordingly.

[0019] Embodiment 1, the present invention discloses a tactile ink tipping paper, including: a base paper layer, a food-grade primer, and a tactile ink.

[0020] Among them, the base paper layer serves as the base paper and can be selected from one of ordinary type, silver-white transfer type, transparent type, high-gloss type, laser type, and direct plating type tipping paper.

[0021] The food-grade primer is pre-coated on the surface of the base paper layer to avoid insufficient smoothness of the paper surface and improve the ink adhesion. It can be preferably a water-based acrylic undercoat with a solid content of 5-8%.

[0022] The tactile ink is printed on the upper side of the food-grade primer. The tactile ink includes, by percentage: waterborne polyurethane resin: 50 - 60%, food-grade silica microspheres: 5 - 10%, nanocellulose: 3 - 7%, pearlescent pigment: 8 - 12%, polyethylene wax emulsion: 3 - 5%, additives: 0.5 - 1%, deionized water: the balance. The food-grade silica microspheres provide the tactile feeling, where 20μm microspheres provide a delicate matte feeling and 50μm ones are coarser. The polyethylene wax improves the smoothness and enhances the dry touch. The additives can be leveling agents, defoaming agents, and wetting agents. The nanocellulose provides strength support.

[0023] Example 2, the present invention discloses a production process of a tactile ink tipping paper, which includes the following steps: S1. Preparation of tactile ink: S11. Resin activation, select waterborne polyurethane with a solid content of 40 - 50% and a pH value of 7 - 8, and place the waterborne polyurethane in an environment of 20 - 25°C 24 hours in advance to avoid uneven viscosity caused by low temperature; S12. Microsphere dispersion, provide food-grade silica microspheres with a particle size of 10 - 50μm, which need to be pre-wetted with ethanol before use in a ratio of 1:1, and let stand for 10 minutes to prevent scattering; at this time, use a fineness meter to detect the fineness of the ink (≤15μm) to ensure that the tactile microspheres (such as silica) are not agglomerated; S13. Blending, add waterborne resin to the stirring tank, slowly add deionized water, accounting for 30% of the total amount, stir at a low speed of 500 - 800 rpm for 5 minutes to initially reduce the viscosity; gradually add iron oxide red pigment to the resin-water mixture, increase the rotation speed to 1200 - 1500 rpm, and disperse for 15 - 20 minutes until the fineness ≤ 15μm; slowly add the pre-wetted silica microspheres and nanocellulose to the system, simultaneously increase the rotation speed to 2000 - 2500 rpm, and disperse for 30 minutes to ensure that the microspheres are evenly suspended; sequentially add additives such as leveling agent, defoaming agent, and wetting agent, reduce the rotation speed to 800 rpm, and stir for 10 minutes; filter and cure to obtain the tactile ink; S2. Treatment of the base paper substrate: S21. Pretreatment, clean the surface of the base paper to remove dust and static electricity; S21. Pre-coat the primer, pre-coat the food-grade primer in an environment with a temperature of 20 - 25°C and a humidity of 50 - 60% to improve the ink adhesion; S3. Printing by the printing press: S31. Gravure inking, inject the tactile ink into the ink tank, immerse the gravure roll in the ink tank, and scrape off the excess ink through a reverse squeegee at an angle of 55 - 65° to avoid ink splashing and only retain the ink in the cells; use gravure printing, which has high precision and strong tactile levels and is suitable for complex patterns.

[0024] S32. Ink transfer: The impression roller presses the base paper after drying the primer against the gravure roller, with a pressure of 0.2 - 0.3 MPa and a speed of 80 - 120 m / min. S33. Sectional drying: The tactile ink is dried by a three - stage drying method using hot air. S4. Slitting and punching for warehousing.

[0025] For further improvement, after adding the additive in step S13, deionized water is used to adjust the final viscosity to ensure that at 25°C, the time for the ink to completely flow out from the orifice of the coating - 4 cup is 30 - 45 s. The addition amount each time ≤ 2%, and re - measure after stirring for 5 minutes.

[0026] For further improvement, in step S13, the ink is filtered through a 200 - mesh sieve to remove undispersed particles; let it stand and mature for 24 hours to stabilize the system and avoid tactile delamination.

[0027] For further improvement, in step S31, the cell depth of the gravure roller is 20 - 40 μm, and the tactile strength corresponds to 20 μm → 40 μm from strong to weak. The tactile strength is jointly determined by the cell depth and the microsphere content. Printing pressure: 0.2 - 0.3 MPa to avoid crushing the microsphere structure. The line number of the anilox roller: 150 - 200 LPI (higher line number can improve the tactile fineness).

[0028] For further improvement, the three - stage drying method in S33 includes: the first stage, drying at 80°C with a wind speed of 10 m / s for 3 s; the second stage, drying at 95°C with a wind speed of 15 m / s for 5 s; the third stage, drying at 60°C with a wind speed of 5 m / s for 2 s.

[0029] For further improvement, the thickness of the tactile ink is 8 - 12 μm, and the tactile effect is positively correlated with the film thickness. Excessive thickness is prone to cracking.

[0030] In this embodiment, the touch is uniform, the ink adhesion is strong, and the touch does not weaken after drying. Example 3

[0031] The present invention discloses a production process of a tactile ink tipping paper, including the following steps: S1. Preparation of tactile ink: S11. Resin activation: Select an aqueous polyurethane with a solid content of 40 - 50% and a pH value of 7 - 8, and place the aqueous polyurethane in an environment of 20 - 25°C 24 hours in advance to avoid uneven viscosity caused by low temperature. S12. Microsphere dispersion: Provide food - grade silica microspheres with a particle size of 10 - 50 μm. They need to be pre - wetted with ethanol before use, with a ratio of 1:1, and let it stand for 10 min to prevent scattering; at this time, use a fineness meter to detect the fineness of the ink (≤ 15 μm) to ensure that there is no agglomeration of tactile microspheres (such as silica). S13. Blending: Add waterborne resin into a stirring tank, slowly add deionized water, which accounts for 30% of the total amount, stir at a low speed of 500 - 800 rpm for 5 min to initially reduce the viscosity; gradually add iron oxide red pigment into the resin - water mixture, increase the rotation speed to 1200 - 1500 rpm, disperse for 15 - 20 min until the fineness ≤ 15 μm; slowly add pre - wetted silica microspheres and nano - cellulose into the system, simultaneously increase the rotation speed to 2000 - 2500 rpm, disperse for 30 min to ensure the uniform suspension of the microspheres; sequentially add additives such as leveling agent, defoaming agent, and wetting agent, reduce the rotation speed to 800 rpm, and stir for 10 min; filter and age to obtain the tactile ink; S2. Treatment of the base paper substrate: S21. Pretreatment: Clean the surface of the base paper to remove dust and static electricity; S21. Pre - coat primer: Under the environment of temperature: 20 - 25 °C, humidity: 50 - 60%, pre - coat a food - grade primer to improve the ink adhesion; S3. Printing by the printing press: S31. Gravure inking: Inject the tactile ink into the ink trough, immerse the gravure roll into the ink trough, and scrape off the excess ink through a reverse doctor blade at an angle of 55 - 65° to avoid ink splashing and only retain the ink in the cells; Use gravure printing, which has high precision and strong tactile levels and is suitable for complex patterns.

[0032] S32. Ink transfer: The impression roll presses the base paper after drying the primer against the gravure roll, with a pressure of 0.2 - 0.3 MPa and a speed of 80 - 120 m / min; S33. Drying: Directly dry the tactile ink by hot air, dry at 80 °C with a wind speed of 10 m / s for 10 seconds; S4. Slitting, punching and warehousing.

[0033] In this embodiment, the touch is uniform and the ink adhesion is strong, but the touch weakens after drying. It is determined that the microspheres are over - impacted by the hot air, and it is necessary to cooperate with the step - by - step temperature - rising drying method in Example 2. Example 4

[0034] The present invention discloses a production process of a tactile ink tipping paper, including the following steps: S1. Preparation of tactile ink: S11. Resin activation: Select a waterborne polyurethane with a solid content of 40 - 50% and a pH value of 7 - 8, and place the waterborne polyurethane in an environment of 20 - 25 °C 24 hours in advance to avoid uneven viscosity caused by low temperature; S12. Preparation: Add water-based resin to a mixing tank, slowly add deionized water to account for 30% of the total amount, and stir at a low speed of 500-800 rpm for 5 minutes to initially reduce the viscosity; gradually add iron oxide red pigment to the resin-water mixture, increase the speed to 1200-1500 rpm, and disperse for 15-20 minutes until the fineness is ≤15μm; slowly add pre-wetted silica microspheres and nanocellulose to the system, simultaneously increase the speed to 2000-2500 rpm, and disperse for 30 minutes to ensure uniform suspension of the microspheres; add additives such as leveling agent, defoamer, and wetting agent in sequence, reduce the speed to 800 rpm, and stir for 10 minutes; filter and mature to obtain the tactile ink; S2. Base paper processing: S21. Pretreatment: cleaning the surface of the base paper to remove dust and static electricity; S21. Pre-apply food-grade primer at a temperature of 20-25°C and a humidity of 50-60% to improve ink adhesion. S3. Printing press printing: S31. Gravure inking: tactile ink is injected into the ink tank, the gravure roller is immersed in the ink tank, and the excess ink is scraped off by a reverse scraper at an angle of 55-65° to avoid ink splashing, leaving only the ink in the mesh cells; gravure printing is used, which has high precision and strong tactile layering, and is suitable for complex patterns.

[0035] S32 ink transfer, the embossing roller presses the base paper after the primer is dried to the gravure roller at a pressure of 0.2-0.3MPa and a speed of 80-120m / min; S33 drying, by direct hot air drying tactile ink, 80 ℃ at a wind speed of 10m / s drying for 10 seconds; S4. Cutting, punching and storage.

[0036] In this embodiment, the touch is uneven, the microspheres are poorly dispersed, and the ink adhesion is strong, but the touch is weakened after drying. It is determined that the microspheres have not been dispersed and are excessively impacted by hot air after drying.

[0037] In summary, the present invention uses food-grade silica microspheres and polyethylene wax emulsion to formulate a tactile ink, thereby improving the tactile feel and enhancing the sensory enjoyment of the smoker. At the same time, the tactile ink is suitable for food contact and is safe and stable. In addition, the pearlescent pigment provides a metallic pearlescent effect, which can enhance the anti-counterfeiting properties in conjunction with the tactile feel itself.

[0038] The foregoing description has shown and described several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. Any changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A tactile ink tipping paper, characterized in that, Comprising: Base paper layer; Food-grade primer pre-coated on the surface of the base paper layer; Tactile ink printed on the upper side of the food-grade primer, and the tactile ink comprises, by percentage: aqueous polyurethane resin: 50 - 60%, food-grade silica microspheres: 5 - 10%, nanocellulose: 3 - 7%, pearlescent pigment: 8 - 12%, polyethylene wax emulsion: 3 - 5%, additives: 0.5 - 1%, deionized water: the balance.

2. A production process of the tactile ink tipping paper as described in claim 1, characterized in that, Including the following steps: S1. Preparation of tactile ink: S11. Resin activation, select aqueous polyurethane with a solid content of 40 - 50% and a pH value of 7 - 8, and place the aqueous polyurethane in an environment of 20 - 25°C 24 hours in advance; S12. Microsphere dispersion, provide food-grade silica microspheres with a particle size of 10 - 50μm, which need to be pre-wetted with ethanol before use and left standing for 10 minutes; S13. Blending, add aqueous resin to a stirring tank, slowly add deionized water, accounting for 30% of the total amount, stir at a low speed of 500 - 800 rpm for 5 minutes to initially reduce the viscosity; gradually add iron oxide red pigment to the resin-water mixture, increase the rotation speed to 1200 - 1500 rpm, and disperse for 15 - 20 minutes until the fineness ≤ 15μm; slowly add the pre-wetted silica microspheres and nanocellulose to the system, simultaneously increase the rotation speed to 2000 - 2500 rpm, and disperse for 30 minutes to ensure that the microspheres are evenly suspended; sequentially add additives such as leveling agent, defoaming agent, and wetting agent, reduce the rotation speed to 800 rpm, and stir for 10 minutes; filter and age to obtain the tactile ink; S2. Treatment of the base paper substrate: S21. Pretreatment, clean the surface of the base paper to remove dust and static electricity; S21. Pre-coat the primer, pre-coat the food-grade primer in an environment with a temperature of 20 - 25°C and a humidity of 50 - 60%; S3. Printing by a printing press: S31. Gravure inking, inject the tactile ink into the ink trough, immerse the gravure roll in the ink trough, and scrape off the excess ink with a reverse squeegee, only retaining the ink in the cells; S32. Ink transfer, the impression roll presses the base paper after drying the primer against the gravure roll, with a pressure of 0.2 - 0.3 MPa and a speed of 80 - 120 m / min; S33. Sectional drying, dry the tactile ink by a three-stage drying method using hot air; S4. Slitting, punching and warehousing.

3. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Wherein the ratio of the food-grade silica microspheres to ethanol in step S12 is 1:

1.

4. The production process of the tactile ink tipping paper according to claim 2, characterized in that Wherein in step S13, the final viscosity is adjusted with deionized water after adding the additives to ensure that at 25°C, the time for the ink to completely flow out from the orifice of the coating-4 cup is 30 - 45 s.

5. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Wherein in step S13, the ink is filtered through a 200-mesh sieve to remove undispersed particles; left standing and aged for 24 hours.

6. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Wherein the food-grade primer in step S21 is an aqueous acrylic undercoat with a solid content of 5 - 8%.

7. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Wherein the angle of the reverse squeegee in step S31 is 55 - 65°.

8. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Wherein the cell depth of the gravure roll in step S31 is 20 - 40μm.

9. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Among them, the three-stage drying method in S33 includes: the first stage, drying at 80°C with a wind speed of 10 m / s for 3 seconds; the second stage, drying at 95°C with a wind speed of 15 m / s for 5 seconds; the third stage, drying at 60°C with a wind speed of 5 m / s for 2 seconds.

10. The production process of the tactile ink tipping paper according to claim 2, characterized in that, Among them, the thickness of the tactile ink is 8-12 μm.