Preparation process of laser water transfer printing film

Abstract

The invention relates to the field of laser water transfer printing films, in particular to a preparation process of a laser water transfer printing film, which comprises the following steps: S1, preparing the following raw materials in percentage by weight: 35% of waterborne polyesteramine, 55% of UV (ultraviolet) curing acrylate, 5% of dispersing agent, 0.2% of flatting agent, 4.5% of nano silicon dioxide suspension and 0.3% of defoaming agent; s2, 35% of water-based polyesteramine and 55% of UV curing acrylic ester are heated to a reaction kettle and stirred at a low speed, meanwhile, the temperature is increased to 40 DEG C through heating, after stirring is conducted till the temperature is proper, 5% of a dispersing agent and 0.2% of a flatting agent are added, stirring is conducted for 10 minutes till the average value is achieved, and a first primary coating is obtained; during preparation of the coating, the optically variable pigment and the aluminum powder are heated, so that a metal reflecting layer is formed on the surface when an imaging layer is coated, the production cost is reduced, the metal texture is better, meanwhile, the wear resistance is improved, a tensioning roller is additionally arranged during conveying detection, the tensioning degree of a base material during conveying is guaranteed, the surface flatness is guaranteed during detection, detection is convenient, and the production efficiency is improved. The influence of substrate bending on the detection accuracy is avoided.

Description

Technical Field

[0001] The present invention relates to the field of laser water transfer printing films, and particularly to the preparation process of laser water transfer printing films. Background Art

[0002] A water transfer printing film is a special material for overall surface printing, mainly used for the three-dimensional surface treatment of irregular objects. Generally, it is used in the water transfer printing process. The water transfer printing film is placed in water, and an activator is sprayed to separate the graphic layer from the carrier, facilitating the transfer operation. The technical core of the water transfer printing film lies in using water pressure to perform polymer hydrolysis on the transfer paper or plastic film with a color pattern, thereby realizing the transfer of the pattern. In production, the optical effect of the laser water transfer printing film can form a unique pattern, which is difficult to imitate, with a better overall optical effect and a more complex master plate process.

[0003] However, in the preparation process of the laser water transfer printing film, multiple processes are required to form a protective layer, an imaging layer, and a reflective layer on the surface of the carrier, resulting in a relatively high processing cost. At the same time, when the finished product passes the inspection, the flatness of the carrier surface directly affects the optical effect, and inaccurate inspection results are likely to occur when the flatness of the carrier is poor. Summary of the Invention

[0004] In order to overcome the problem that inaccurate inspection results are likely to occur when the flatness of the carrier is poor.

[0005] The technical solution of the present invention is: a preparation process of a laser water transfer printing film, specifically including the following steps: S1. Prepare raw materials according to the following weight percentages: 35% of water-based polyester amine, 55% of UV-curable acrylate, 5% of dispersant, 0.2% of leveling agent, 4.5% of nano-silica suspension, and 0.3% of defoaming agent; S2. Put 35% of water-based polyester amine and 55% of UV-curable acrylate into a heating reaction kettle, and perform low-speed stirring. At the same time, heat up to 40 degrees. After stirring until the temperature is appropriate, add 5% of dispersant and 0.2% of leveling agent, and stir for 10 minutes until uniform to obtain the primary coating one; S3. Add 4.5% of nano-silica suspension to the primary coating one obtained in S2, increase the stirring speed, stir for 20 minutes, then add 0.3% of defoaming agent, and continue to stir for 15 minutes to obtain the primary coating two; S4. Add photochromic pigment and aluminum powder to the primary coating two obtained in S3, and perform high-speed dispersion for 30 minutes through a high-speed dispersant. After the dispersion is completed, add a thickening agent to adjust the coating viscosity to 2000 - 5000 mPa·s to obtain the primary coating three; S5. Filter the primary coating three obtained in S4 to remove undispersed particles to obtain the final coating product; S6. Coating the coating product obtained in S5 on the surface of the substrate by the slot coating process, with a coating speed of 10 - 20 m / min and a coating thickness of 5 - 8 μm, and then forming an imaging layer in the coating by the laser holographic embossing process; S7. A drying and curing device synchronously processes the substrate by UV curing and thermal curing, and winds up the finished product after inspection; Among them, the drying and curing device in S7 includes a winding table and a drying oven. The lower end of the winding table is fixedly installed with a support frame, the upper end of the winding table is fixedly connected to the drying oven, a winding device is arranged on the upper end of the winding table on the side of the drying oven, and a detection box is arranged at the right end of the drying oven, and an optical detection device is arranged in the detection box.

[0006] Preferably, the finished substrate is conveyed through the winding table, wound up by the winding device, and cured when passing through the drying oven. The cured substrate enters the detection box, and the optical detection device detects its imaging effect, ensuring the product quality.

[0007] Preferably, in step S2, the stirring temperature is controlled at 40 ± 2 °C, and the low-speed stirring speed is within 200 rpm.

[0008] Preferably, in step S3, the stirring speed needs to be increased to 800 - 1200 rpm, and the nano-silica suspension needs to be diluted according to 1:5, the total amount of defoamer is 0.3%, and it is added in two times.

[0009] Preferably, in step S4, the addition amount of the thickener is 0.5% - 1%, and the thickener is HEUR-H50 or HEURASE.

[0010] Preferably, in step S5, three-stage filtration treatment is required, and the three filter meshes are 20 μm, 10 μm, and 5 μm respectively.

[0011] Preferably, turning rollers are arranged on the left side of the upper end of the winding table, and both the front and rear ends of the turning rollers are rotatably connected to side mounting plates, and the lower ends of the side mounting plates are fixedly connected to the turning rollers.

[0012] Preferably, a UV LED surface light source is fixedly installed on the inner top of the drying oven, a heating plate is arranged on the inner top of the drying oven on the side of the UV LED surface light source, and heating tubes are arranged on the heating plate and are equally spaced.

[0013] Preferably, a tension roller is arranged inside the detection box, limiting rollers are arranged on both sides of the tension roller inside the detection box, the two limiting rollers and the tension roller are not on the same horizontal plane, guiding grooves are opened at both the front and rear ends of the detection box, sliding seats are slidably installed in the guiding grooves, the upper and lower ends of the sliding seats are movably connected to the inner walls of the guiding grooves through springs, and both ends of the tension roller are rotatably connected to the sliding seats.

[0014] Preferably, the winding device includes a first movable seat and a second movable seat. Spline seats are rotatably mounted on the surfaces of the first movable seat and the second movable seat. An adjusting component is provided between the lower ends of the first movable seat and the second movable seat and the winding table. A winding roller is provided between the two spline seats. Spline grooves are provided at both ends of the winding roller. A driving motor is fixedly connected to the outside of the surface of the second movable seat through a bracket. A first transmission wheel is fixedly connected to the output end of the driving motor. A second transmission wheel is fixedly connected to the front end of the spline seat extending to the outside of the second movable seat. The first transmission wheel and the second transmission wheel are connected by a belt drive.

[0015] Preferably, the adjusting component includes a displacement groove. A displacement groove is provided on the right side of the upper end surface of the winding table. A double-headed screw rod is provided in the displacement groove. The two ends of the double-headed screw rod are rotatably connected to the two ends of the displacement groove, and the front end of the double-headed screw rod extends to the outside of the winding table and is fixedly installed with a turning handle. The threads at both ends of the double-headed screw rod are opposite and the pitches are the same. The two ends of the double-headed screw rod are respectively threadedly connected to the first movable seat and the second movable seat. Guide rods are fixedly connected to both sides of the double-headed screw rod inside the displacement groove. The guide rods are slidably connected to the first movable seat and the second movable seat.

[0016] Advantages of the present invention: In the preparation process of the laser water transfer printing film, the heat-sensitive photochromic pigment and aluminum powder are heated during the coating production, so that when the imaging layer is coated, a metal reflection layer is formed on the surface, reducing the production cost, making the metallic texture better, and at the same time increasing the wear resistance. During the conveying and detection, a tensioning roller is added. Through the elasticity of the springs on both sides, the tensioning roller can move, ensuring the tension of the substrate during conveying and ensuring the flatness of the surface during detection, facilitating detection and avoiding the bending of the substrate from affecting the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic structural diagram of the winding table of the preparation process of the laser water transfer printing film of the present invention; Figure 2 Shown is a schematic structural diagram of the drying oven of the preparation process of the laser water transfer printing film of the present invention; Figure 3 Shown is a schematic structural diagram of the detection box of the preparation process of the laser water transfer printing film of the present invention; Figure 4 Shown is of the present invention Figure 3 The enlarged structural diagram at A in; Figure 5 Shown is a schematic structural diagram of the double-headed screw rod of the preparation process of the laser water transfer printing film of the present invention.

[0018] Description of the drawing reference numerals: 1. Rewinding table; 2. Drying oven; 21. UV LED surface light source; 22. Heating plate; 3. Detection box; 31. Tensioning roller; 32. Limiting roller; 33. Guide groove; 34. Sliding seat; 4. Steering roller; 41. Side mounting plate; 5. First movable seat; 51. Double-headed lead screw; 52. Guide rod; 6. Second movable seat; 61. Driving motor; 7. Spline seat. Detailed implementation manners

[0019] The present invention will be further described below in conjunction with the drawings and embodiments. Embodiment

[0020] Please refer to Figures 1-5 , the present invention provides an embodiment: a preparation process of a laser water transfer printing film, specifically including the following steps: S1. Prepare raw materials according to the following weight percentages: 35% of water-based polyester amine, 55% of UV-curable acrylate, 5% of dispersant, 0.2% of leveling agent, 4.5% of nano-silica suspension, and 0.3% of defoaming agent; S2. Put 35% of water-based polyester amine and 55% of UV-curable acrylate into a reaction kettle, and carry out low-speed stirring. At the same time, heat up to 40 °C. After stirring until the temperature is appropriate, add 5% of dispersant and 0.2% of leveling agent, and stir for 10 minutes until uniform to obtain the primary coating one; S3. Add 4.5% of nano-silica suspension to the primary coating one obtained in S2, and increase the stirring speed. After stirring for 20 minutes, add 0.3% of defoaming agent and continue to stir for 15 minutes to obtain the primary coating two; S4. Add photochromic pigment and aluminum powder to the primary coating two obtained in S3, and carry out high-speed dispersion for 30 minutes through a high-speed dispersant. After the dispersion is completed, add a thickening agent to adjust the coating viscosity to 2000 - 5000 mPa·s to obtain the primary coating three; S5. Filter the primary coating three obtained in S4 to remove undispersed particles to obtain the final coating product; S6. Coating the coating product obtained in S5 on the surface of the substrate by a slit coating process, with a coating speed of 10 - 20 m / min and a coating thickness of 5 - 8 μm, and then forming an imaging layer in the coating by a laser holographic embossing process; S7. Drying and curing equipment, synchronously process the substrate by UV curing and thermal curing, and wind up the finished product after inspection; Among them, the drying and curing equipment in S7 includes a winding table 1 and a drying oven 2. A support frame is fixedly installed at the lower end of the winding table 1. The upper end of the winding table 1 is fixedly connected to the drying oven 2. A winding device is arranged on the upper end of the winding table 1 on the side of the drying oven 2. And a detection box 3 is arranged at the right end of the drying oven 2. An optical detection device is arranged in the detection box 3. The finished base material is conveyed through the winding table 1, wound by the winding device, and cured when passing through the drying oven 2. The cured base material enters the detection box 3, and the optical detection device detects its imaging effect to ensure product quality. The optical detection device is an existing device.

[0021] In the embodiment of the present invention, in step S2, the stirring temperature is controlled at 40±2 degrees, and the low-speed stirring speed is within 200 rpm. The control of temperature can prevent the resin from curing prematurely, and reducing the stirring speed can reduce the generation of bubbles.

[0022] In the embodiment of the present invention, in step S3, the stirring speed needs to be increased to 800 rpm - 1200 rpm, and the nano-silica suspension needs to be diluted according to 1:5. The total amount of defoamer is 0.3%, and it is added in two times to avoid excessive defoaming affecting the surface tension.

[0023] In the embodiment of the present invention, in step S4, the addition amount of the thickener is 0.5% - 1%, and the thickener is HEUR-H50 or HEURASE. In the viscosity adjustment, the dilution degree can be adjusted by adding deionized water to prevent over-dilution from affecting the film-forming effect.

[0024] In the embodiment of the present invention, in step S5, three-stage filtration treatment is required. The three filter meshes are 20um, 10um, and 5um respectively, which can effectively remove dispersed particles and ensure the quality of the coating.

[0025] In the embodiment of the present invention, turning rollers 4 are arranged on the left side of the upper end of the winding table 1. Both the front and rear ends of the turning rollers 4 are rotatably connected to side mounting plates 41. The lower ends of the side mounting plates 41 are fixedly connected to the turning rollers 4. The finished base material enters the winding table 1 after being guided by the turning rollers 4.

[0026] In the embodiment of the present invention, a UVLED surface light source 21 is fixedly installed at the top inside the drying oven 2. A heating plate 22 is arranged on the side of the UVLED surface light source 21 at the top inside the drying oven 2. Heating tubes are arranged on the heating plate 22 and are equally spaced. Synchronous drying treatment is carried out by using the UV light source and the heating and drying method, reducing the drying time and improving the production efficiency.

[0027] In the embodiment of the present invention, a tension roller 31 is arranged inside the detection box 3. Limiting rollers 32 are arranged on both sides of the tension roller 31 inside the detection box 3. The two limiting rollers 32 and the tension roller 31 are not on the same horizontal plane. Guide grooves 33 are formed at the front and rear ends of the detection box 3. A sliding seat 34 is slidably installed in the guide grooves 33. The upper and lower ends of the sliding seat 34 are movably connected to the inner wall of the guide grooves 33 through springs. The two ends of the tension roller 31 are rotatably connected to the sliding seat 34. The tension roller 31 ensures the conveying flatness of the finished base material, thereby ensuring the accuracy of the detection result. Embodiment

[0028] On the basis of Embodiment 1, a winding device is arranged on the upper end of the winding table 1 on the side of the drying box 2. The winding device includes a first movable seat 5 and a second movable seat 6. Spline seats 7 are rotatably installed on the surfaces of the first movable seat 5 and the second movable seat 6. An adjusting component is arranged between the lower ends of the first movable seat 5 and the second movable seat 6 and the winding table 1. A winding roller is arranged between the two spline seats 7. Spline grooves are formed at both ends of the winding roller. A driving motor 61 is fixedly connected to the outside of the surface of the second movable seat 6 through a bracket. The output end of the driving motor 61 is fixedly connected to a first transmission wheel. The front end of the spline seat 7 extends to the outside of the second movable seat 6 and is fixedly connected to a second transmission wheel. The first transmission wheel and the second transmission wheel are connected by a belt. The two ends of the winding roller are connected to the spline seats 7, which facilitates the driving motor 61 to drive the winding roller to rotate and realize uniform winding.

[0029] In the embodiment of the present invention, the adjusting component includes a displacement groove. A displacement groove is formed on the right side of the upper end surface of the winding table 1. A double-headed lead screw 51 is arranged in the displacement groove. The two ends of the double-headed lead screw 51 are rotatably connected to the two ends of the displacement groove. The front end of the double-headed lead screw 51 extends to the outside of the winding table 1 and is fixedly installed with a turning handle. The threads at both ends of the double-headed lead screw 51 are opposite and have the same pitch. The two ends of the double-headed lead screw 51 are respectively threadedly connected to the first movable seat 5 and the second movable seat 6. Guide rods 52 are fixedly connected to both sides of the double-headed lead screw 51 inside the displacement groove. The guide rods 52 are slidably connected to the first movable seat 5 and the second movable seat 6. By rotating the double-headed lead screw 51, the first movable seat 5 and the second movable seat 6 can be moved, which is convenient for taking out the winding roller for replacement and improves the convenience.

[0030] When working, the finished substrate turns after passing through the turning roller 4 and enters the drying box 2, where it is synchronously dried by using a UV light source and a heating and drying method, reducing the drying time and improving the production efficiency. At the same time, the cured substrate enters the detection box 3. When the substrate passes through the tension roller 31 and the limiting roller 32, a triangular path is formed, one side of which is parallel to the detection device. Then, through the movement of the tension roller 31, the substrate maintains good flatness, ensuring the accuracy of the detection result. Finally, the substrate is wound by the winding roller. The two ends of the winding roller are connected to the spline seat 7, which facilitates the driving motor 61 to drive the winding roller to rotate and achieve uniform winding. In addition, by rotating the rotating double-headed screw rod 51, the first movable seat 5 and the second movable seat 6 move, which is convenient for taking out the winding roller for replacement, improving the convenience.

[0031] Through the above steps, the finished substrate is conveyed through the winding table 1 and wound by the winding device. When passing through the drying box 2, it is cured. The cured substrate enters the detection box 3, and the optical detection device performs detection imaging on it, ensuring the product quality and solving the problem that inaccurate detection results are easily caused when the flatness of the carrier is poor.

[0032] At the same time, the content not described in detail in this specification belongs to the well-known prior art of those skilled in the art.

Claims

1. Preparation process of laser water transfer printing film, characterized in that Specifically, it includes the following steps: S1. Prepare raw materials according to the following weight percentages: 35% of waterborne polyester amine, 55% of UV-curable acrylate, 5% of dispersant, 0.2% of leveling agent, 4.5% of nano-silica suspension, and 0.3% of defoamer; S2. Put 35% of waterborne polyester amine and 55% of UV-curable acrylate into a reaction kettle, and carry out low-speed stirring. At the same time, heat up to 40 degrees. After stirring until the temperature is appropriate, add 5% of dispersant and 0.2% of leveling agent, and stir for 10 minutes until uniform to obtain the first primary coating; S3. Add 4.5% of nano-silica suspension to the first primary coating obtained in S2, and increase the stirring speed. After stirring for 20 minutes, add 0.3% of defoamer and continue to stir for 15 minutes to obtain the second primary coating; S4. Add photochromic pigment and aluminum powder to the second primary coating obtained in S3, and carry out high-speed dispersion for 30 minutes through a high-speed dispersant. After the dispersion is completed, add a thickener to adjust the coating viscosity to 2000 - 5000 mPa·s to obtain the third primary coating; S5. Filter the third primary coating obtained in S4 to remove undispersed particles to obtain the final coating product; S6. Coating the coating product obtained in S5 on the surface of the substrate through a slot coating process, with a coating speed of 10 - 20 m / min and a coating thickness of 5 - 8 μm, and then forming an imaging layer in the coating through a laser holographic embossing process; S7. Use drying and curing equipment to synchronously treat the substrate through UV curing and thermal curing, and wind up the finished product after inspection; Among them, the drying and curing equipment in S7 includes a winding table (1) and a drying oven (2). A support frame is fixedly installed at the lower end of the winding table (1), and the upper end of the winding table (1) is fixedly connected to the drying oven (2). A winding device is arranged on the upper end of the winding table (1) on the side of the drying oven (2), and a detection box (3) is arranged at the right end of the drying oven (2). An optical detection device is arranged in the detection box (3).

2. The preparation process of the laser water transfer printing film according to claim 1, wherein: In step S2, the stirring temperature is controlled at 40 ± 2 degrees, and the low-speed stirring speed is within 200 rpm.

3. The preparation process of the laser water transfer printing film according to claim 1, characterized in that: In step S3, the stirring speed needs to be increased to 800 - 1200 rpm, and the nano-silica suspension needs to be diluted according to a ratio of 1:

5. The total amount of defoamer is 0.3%, and it is added in two times.

4. The preparation process of the laser water transfer printing film according to claim 1, wherein: In step S4, the addition amount of the thickener is 0.5% - 1%, and the thickener is HEUR-H50 or HEURASE.

5. The preparation process of the laser water transfer printing film according to claim 1, wherein: In step S5, three-stage filtration treatment is required, and the three filter meshes are 20 μm, 10 μm, and 5 μm respectively.

6. The preparation process of the laser water transfer printing film according to claim 1, characterized in that: Steering rollers (4) are arranged on the left side of the upper end of the winding table (1). Both the front and rear ends of the steering rollers (4) are rotatably connected to side mounting plates (41), and the lower ends of the side mounting plates (41) are fixedly connected to the steering rollers (4).

7. The preparation process of the laser water transfer printing film according to claim 1, characterized in that: A UV LED surface light source (21) is fixedly installed at the top inside the drying oven (2). A heating plate (22) is arranged on the side of the UV LED surface light source (21) at the top inside the drying oven (2). Heating tubes are arranged on the heating plate (22), and the heating tubes are evenly distributed.

8. The preparation process of the laser water transfer printing film according to claim 1, characterized in that: A tension roller (31) is provided inside the detection box (3). Limiting rollers (32) are provided on both sides of the tension roller (31) inside the detection box (3). The two limiting rollers (32) and the tension roller (31) are not on the same horizontal plane. Guide grooves (33) are provided at both the front and rear ends of the detection box (3). A sliding seat (34) is slidably installed in the guide grooves (33). Both the upper and lower ends of the sliding seat (34) are movably connected to the inner wall of the guide grooves (33) through springs. And both ends of the tension roller (31) are rotatably connected to the sliding seat (34).

9. The preparation process of the laser water transfer printing film according to claim 1, characterized in that: The winding device includes a first movable seat (5) and a second movable seat (6). Spline seats (7) are rotatably installed on the surfaces of the first movable seat (5) and the second movable seat (6). An adjusting assembly is provided between the lower ends of the first movable seat (5) and the second movable seat (6) and the winding table (1). A winding roller is provided between the two spline seats (7). Spline grooves are provided at both ends of the winding roller. A driving motor (61) is fixedly connected to the outside of the surface of the second movable seat (6) through a bracket. The output end of the driving motor (61) is fixedly connected to a first transmission wheel. The front end of the spline seat (7) extends to the outside of the second movable seat (6) and is fixedly connected to a second transmission wheel. The first transmission wheel and the second transmission wheel are connected by a belt.

10. The preparation process of the laser water transfer printing film according to claim 9, characterized in that: The adjusting assembly includes a displacement groove. A displacement groove is provided on the right side of the upper end surface of the winding table (1). A double-headed screw rod (51) is provided in the displacement groove. Both ends of the double-headed screw rod (51) are rotatably connected to both ends of the displacement groove. And the front end of the double-headed screw rod (51) extends to the outside of the winding table (1) and is fixedly installed with a turning handle. The threads at both ends of the double-headed screw rod (51) are opposite and the pitches are the same. Both ends of the double-headed screw rod (51) are respectively threadedly connected to the first movable seat (5) and the second movable seat (6). Guide rods (52) are fixedly connected to both sides of the double-headed screw rod (51) inside the displacement groove. The guide rods (52) are slidably connected to the first movable seat (5) and the second movable seat (6).

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