阅读说明：本技术 一种防镭射膜制备方法 (Preparation method of laser-proof film ) 是由 李鹏飞 张旭光 钟妹 于 2021-01-15 设计创作，主要内容包括：本发明涉及一种防镭射膜制备方法,包括基膜和底纹纸,所述底纹纸包括纸张本体和设置在纸张本体上的调幅网点,依次包括以下步骤：步骤一底纹纸制备、步骤二基膜涂布、步骤三模压、步骤四镀铝和步骤五分切；本发明的优点：由于步骤一采用调节调幅网点和调整线条的数量来模拟所需的图文信息,通过调幅网点来表现图像的层次,并通过调整线条来增强图文折光效果,使其能模拟不同的图文信息,使其适应不同的客户需求,图文可变性强,修改方便,制作快捷周期短,客户可直观看到整体效果,制作成本仅占模具制作的20％左右,客户不需要为定做模具而长时间等待,能快速响应客户的各类印量需求,而且制作后的防镭射膜表面图文折光效果突出。(The invention relates to a preparation method of a laser-proof film, which comprises a base film and shading paper, wherein the shading paper comprises a paper body and amplitude modulation mesh points arranged on the paper body, and the preparation method sequentially comprises the following steps: preparing base line paper, coating a base film, performing mould pressing, performing aluminizing and cutting; the invention has the advantages that: the first step is to adjust the number of amplitude modulation dots and adjusting lines to simulate the required image-text information, the image levels are represented by the amplitude modulation dots, and the image-text refraction effect is enhanced by adjusting the lines, so that different image-text information can be simulated, different customer requirements can be met, the image-text variability is strong, the modification is convenient, the production is rapid and short, the customer can visually see the whole effect, the production cost only accounts for about 20% of that of the mold production, the customer does not need to wait for a long time for customizing the mold, various printing quantity requirements of the customer can be rapidly responded, and the image-text refraction effect on the surface of the laser-proof film after production is outstanding.)

1. A preparation method of a laser-proof film comprises a base film and is characterized in that: still include the ground tint paper, the ground tint paper includes the paper body and sets up the amplitude modulation site on the paper body, still be equipped with the adjustment lines of reinforcing picture and text refraction effect on the paper body, include following step in proper order:

the method comprises the following steps: preparing the base pattern paper: simulating the required graphic information by adjusting the number of amplitude modulation dots and adjusting lines;

step two: coating a base film: coating a coating on a base film uniformly through a coating machine, and baking through five sections of baking ovens, wherein the speed of the coating machine is 100-120 m/min, the coating weight of a release layer coating in each square PET base film is 5.12-6.05 g, the temperature of a first section of box body is 20-25% lower than that of a second section of box body, the temperature of a third section of box body is 10-20% higher than that of the second section of box body, the temperature of a fourth section of box body is equal to that of the third section of box body, the temperature of a fifth section of box body is equal to that of the second section of box body, and the temperature of the first section of box body is 85-100 ℃;

step three: die pressing: pressing the image-text information simulated in the first step on the base film processed in the second step, wherein the mould pressing temperature is 180-190 ℃;

step four: aluminum plating: coating an aluminum layer on the surface of the base film after the third step by vacuum aluminum plating, wherein the vacuum degree during plating is 1.3 multiplied by 10^-2～1.3×10^-3Pa, the temperature during plating is 1200-1400 ℃;

step five: slitting: and cutting the base film treated in the step four.

2. The method for preparing a laser-proof film according to claim 1, wherein the method comprises the following steps: in the step one, the image-text information is adjusted by adjusting the size, shape or area of the adjusting screen dots.

3. The method for preparing a laser-proof film according to claim 1, wherein the method comprises the following steps: the adjusting lines are printed on the paper body through printing ink.

4. The method of claim 3, wherein the step of preparing the laser-proof film comprises the following steps: the adjusting lines are arranged on the paper body in the horizontal direction or/and the vertical direction.

5. The method for preparing a laser-proof film according to claim 1, wherein the method comprises the following steps: the coating in the second step comprises the following components: 25.7-31.4 parts by mass of an acrylate copolymer, 8.03-9.11 parts by mass of cellulose acetate propionate, 28.06-35.84 parts by mass of n-propyl acetate and 15.21-17.56 parts by mass of n-propanol.

6. The method for preparing a laser-proof film according to claim 1, wherein the method comprises the following steps: the temperature of the five sections of the oven in the second step is 95 ℃, 120 ℃, 135 ℃ and 120 ℃ respectively.

7. The method for preparing a laser-proof film according to claim 1, wherein the method comprises the following steps: in the fourth step, the thickness of the aluminum layer is 280-320 angstroms.

8. The method for preparing a laser-proof film according to claim 1, wherein the method comprises the following steps: and cutting the base film in the step five by a cutting machine, wherein the cutting machine is controlled by a PLC.

Technical Field

The invention relates to a preparation method of a laser-proof film.

Background

The prior laser film adopts the anti-counterfeiting technical means, usually adopts the dot matrix photoetching technology, the true color holographic technology, the multiple and dynamic imaging technology and the like, transfers the molded anti-counterfeiting holographic image to a base material, and then uses the compounding, hot stamping, transferring and other modes to ensure that the surface of the package obtains a certain laser effect. In order to realize the effect, the image-text mould needs to be manufactured separately, the mould manufacturing period is long, the price is high, and the use cost of a user is increased.

Disclosure of Invention

The invention aims to provide a method for preparing a laser-proof film, which can shorten the manufacturing period and effectively reduce the manufacturing cost.

In order to solve the technical problems, the invention is realized by the following technical scheme: a preparation method of a laser-proof film comprises a base film and ground-print paper, wherein the ground-print paper comprises a paper body and amplitude-modulated mesh points arranged on the paper body, the paper body is also provided with adjusting lines for enhancing the image-text refraction effect, and the preparation method sequentially comprises the following steps:

the method comprises the following steps: preparing the base pattern paper: simulating the required graphic information by adjusting the number of amplitude modulation dots and adjusting lines;

step two: coating a base film: coating a coating on a base film uniformly through a coating machine, and baking through five sections of baking ovens, wherein the speed of the coating machine is 100-120 m/min, the coating weight of a release layer coating in each square PET base film is 5.12-6.05 g, the temperature of a first section of box body is 20-25% lower than that of a second section of box body, the temperature of a third section of box body is 10-20% higher than that of the second section of box body, the temperature of a fourth section of box body is equal to that of the third section of box body, the temperature of a fifth section of box body is equal to that of the second section of box body, and the temperature of the first section of box body is 85-100 ℃;

step three: die pressing: pressing the image-text information simulated in the first step on the base film processed in the second step, wherein the mould pressing temperature is 180-190 ℃;

step four: aluminum plating: coating an aluminum layer on the surface of the base film after the third step by vacuum aluminum plating, wherein the vacuum degree during plating is 1.3 multiplied by 10^-2～1.3×10^-3Pa, the temperature during plating is 1200-1400 ℃;

step five: slitting: and cutting the base film treated in the step four.

Preferably, in the step one, the size, shape or area of the screen dot is adjusted to adjust the graphic and text information.

Preferably, the adjusting lines are printed on the paper body through ink.

Preferably, the adjusting lines are arranged on the paper body in the horizontal direction or/and the vertical direction.

Preferably, the coating in the second step comprises the following components: 25.7-31.4 parts by mass of an acrylate copolymer, 8.03-9.11 parts by mass of cellulose acetate propionate, 28.06-35.84 parts by mass of n-propyl acetate and 15.21-17.56 parts by mass of n-propanol.

Preferably, the temperatures of the five sections of ovens in the second step are 95 ℃, 120 ℃, 135 ℃ and 120 ℃.

Preferably, the thickness of the aluminum layer in the fourth step is 280-320 angstroms.

Preferably, the base film in the fifth step is cut by a cutting machine, and the cutting machine is controlled by a PLC.

In conclusion, the invention has the advantages that: the laser-proof film is prepared by the preparation method of the backing paper in the first step, the coating of the base film in the second step, the die pressing in the third step, the aluminizing in the fourth step and the slitting in the fifth step, because the required graphic information is simulated by adjusting the number of amplitude modulation dots and adjusting lines in the first step, the image level is expressed by the amplitude modulation dots, and the graphic refraction effect is enhanced by adjusting the lines, the laser-proof film can simulate different graphic information, so that the laser-proof film is suitable for different customer requirements, has strong graphic variability, convenient modification and short manufacturing quick period, can be directly seen by customers, has the manufacturing cost of only accounting for about 20 percent of the manufacturing cost of the die, does not need to wait for a long time for customizing the die, can quickly respond to various printing quantity requirements of the customers, has outstanding graphic refraction effect on the surface of the manufactured laser-proof film, high smoothness, bright color, beautiful appearance, the grade of the product can be well improved.

Detailed Description

The first embodiment is as follows:

a preparation method of a laser-proof film comprises a base film and ground-print paper, wherein the ground-print paper comprises a paper body and amplitude-modulated mesh points arranged on the paper body, the paper body is also provided with adjusting lines for enhancing the image-text refraction effect, and the preparation method sequentially comprises the following steps:

the method comprises the following steps: preparing the base pattern paper: simulating the required graphic information by adjusting the number of amplitude modulation dots and adjusting lines;

step two: coating a base film: uniformly coating a coating on a base film through a coating machine, and baking the base film through a five-section baking oven, wherein the speed of the coating machine is 100-120 m/min, the coating weight of the release layer coating in each square of the PET base film is 5.12-6.05 g, and the coating comprises the following components: 31.4 parts by mass of acrylate copolymer, 9.11 parts by mass of cellulose acetate propionate, 28.06 parts by mass of n-propyl acetate and 17.56 parts by mass of n-propanol, wherein the temperatures of the five sections of ovens are 95 ℃, 120 ℃, 135 ℃ and 120 ℃ respectively;

step three: die pressing: pressing the image-text information simulated in the first step on the base film processed in the second step, wherein the mould pressing temperature is 180-190 ℃;

step four: aluminum plating: coating an aluminum layer on the surface of the base film after the third step by vacuum aluminum plating, wherein the vacuum degree during plating is 1.3 multiplied by 10^-2～1.3×10^-3Pa, the temperature during plating is 1200-1400 ℃;

step five: slitting: and cutting the base film treated in the step four.

The laser-proof film is prepared by the preparation method of the backing paper in the first step, the coating of the base film in the second step, the die pressing in the third step, the aluminizing in the fourth step and the slitting in the fifth step, because the required graphic information is simulated by adjusting the number of amplitude modulation dots and adjusting lines in the first step, the image level is expressed by the amplitude modulation dots, and the graphic refraction effect is enhanced by adjusting the lines, the laser-proof film can simulate different graphic information, so that the laser-proof film is suitable for different customer requirements, has strong graphic variability, convenient modification and short manufacturing quick period, can be directly seen by customers, has the manufacturing cost of only accounting for about 20 percent of the manufacturing cost of the die, does not need to wait for a long time for customizing the die, can quickly respond to various printing quantity requirements of the customers, has outstanding graphic refraction effect on the surface of the manufactured laser-proof film, high smoothness, bright color, beautiful appearance, the grade of the product can be well improved.

In the step one, the image-text information is adjusted by adjusting the size, shape or area of the adjusting mesh points, the adjusting mesh points can be adjusted according to different image-text information, various printing quantity requirements of customers can be responded quickly, the adjusting mesh points are printed on the paper body through printing ink, the printing ink can enable the adjusting mesh points to be printed on the paper body quickly, the adjusting mesh points can be printed according to actual requirements, the adjusting mesh points are arranged on the paper body in the horizontal direction or/and the vertical direction, the distance between the adjusting mesh points can be controlled, the adjusting mesh points can meet different customer requirements, and the practical performance is good.

The thickness of aluminium lamination is 280 ~ 320 angstroms in step four, and practicality is good, and the washing and the protection of aluminium lamination in the subsequent handling of being convenient for, when aluminium lamination thickness is less than 280 angstroms, the aluminium lamination is damaged easily, and reliability is poor, and when aluminium lamination thickness is greater than 320 angstroms, the aluminium lamination is difficult not to wash, easily influences follow-up technology, and practicality is poor, and the base film in step five is cut through the cutting machine and is handled, just the cutting machine passes through PLC control, and PLC control can set up the parameter according to cutting the requirement, and control effect is good, and practicality is good, the operation of being convenient for, and reliability is good, makes it can adapt to different product demands.

Example two:

the method for preparing a laser-proof film according to the first embodiment of the present invention includes the following steps: the coating in the second step comprises the following components: 25.7 parts by mass of an acrylic copolymer, 8.03 parts by mass of cellulose acetate propionate, 35.84 parts by mass of n-propyl acetate, and 15.21 parts by mass of n-propanol.

Example three:

the method for preparing a laser-proof film according to the first and second embodiments of the present invention has the following differences: the coating in the second step comprises the following components: 26.5 parts by mass of acrylate copolymer, 8.68 parts by mass of cellulose acetate propionate, 32.25 parts by mass of n-propyl acetate and 16.79 parts by mass of n-propanol, so that the prepared coating has good transferability, the toughness of the generated film can be reduced, the edge cutting treatment is convenient, and the quality of the product is improved.

Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.