阅读说明：本技术 一种高可视对比度反光膜的制造方法 (Method for manufacturing high-visual-contrast reflective film ) 是由 郑小平 舒林飞 胡敏超 苏国芳 叶成斌 王晨 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种高可视对比度反光膜的制造方法,包括以下步骤：取基材涂布树脂液A,得到面层；将热塑性树脂转印到面层上,得到印刷块；在面层上涂布UV树脂液,形成UV树脂层；UV树脂层上植珠玻璃微珠,得玻璃微珠层；用单面胶带带走印刷块以及与印刷块对应部分,得到一层中空玻璃微珠块；接着涂布树脂液B,形成颜色层并形成颜色层薄部、颜色层厚部；接着进行真空蒸镀,形成金属层；在离型层表面涂布压敏胶形成压敏胶层与金属层粘合,得到高可视对比度反光膜。本发明以上步骤的相互配合,通过玻璃微珠选择性扣除和区间内颜色的深浅对比性,从而得到一种高可视对比度反光膜,增强了警示效果,提升了防伪的技术门槛,更难被仿造和串改。(The invention discloses a method for manufacturing a reflective film with high visual contrast, which comprises the following steps: coating the base material with the resin liquid A to obtain a surface layer; transferring the thermoplastic resin onto the surface layer to obtain a printing block; coating UV resin liquid on the surface layer to form a UV resin layer; planting glass beads on the UV resin layer to obtain a glass bead layer; taking the printing block and the part corresponding to the printing block away by using a single-sided adhesive tape to obtain a layer of hollow glass bead block; then coating the resin liquid B to form a color layer and form a color layer thin part and a color layer thick part; then carrying out vacuum evaporation to form a metal layer; and coating a pressure-sensitive adhesive on the surface of the release layer to form a pressure-sensitive adhesive layer to be adhered with the metal layer, so as to obtain the high-visual-contrast reflective film. The steps are mutually matched, and the high-visible-contrast reflective film is obtained by selectively deducting the color depth contrast in the interval through the glass beads, so that the warning effect is enhanced, the anti-counterfeiting technical threshold is improved, and the anti-counterfeiting reflective film is more difficult to counterfeit and alter.)

1. A method for manufacturing a reflective film with high visual contrast is characterized in that: the method comprises the following steps:

(1) taking a base material, coating the resin liquid A on the surface of the base material, and drying the base material in an oven to obtain a surface layer (1);

(2) transferring the thermoplastic resin onto the surface layer (1) by using a printing plate roller engraved with characters or patterns, thereby obtaining a printing block (2) on the surface layer (1);

(3) coating a UV resin liquid on one side of a surface layer (1) printed with a printing block (2), forming a UV resin layer (3) on the surface of the surface layer (1), wherein the UV resin layer (3) covers the printing block (2);

(4) transferring the glass beads onto the UV resin layer (3) through a bead planting device, and then irradiating the glass beads through a UV lamp to obtain a glass bead layer (4);

(5) taking a single-sided adhesive tape (5) to adhere to a UV resin layer (3) and a glass bead layer (4), and taking away a printing block (2) and parts, corresponding to the printing block (2), on the UV resin layer (3) and the glass bead layer (4) through the single-sided adhesive tape (5), so as to obtain a layer of hollow glass bead blocks (6) on the surface of a surface layer (1);

(6) coating a resin liquid B on the surfaces of the hollow glass bead block (6) and the surface layer (1) through a coating machine, drying and curing the resin liquid B to form a color layer (7), forming a color layer thin part (71) on the color layer (7) above the hollow glass bead block (6), and forming a color layer thick part (72) on the color layer (7) at the position of the non-hollow glass bead block (6);

(7) carrying out vacuum evaporation on the surface of the color layer (7) through a vacuum evaporation machine, and forming a metal layer (8) on the surface of the color layer (7);

(8) a release paper or a release film is taken to form a release layer (10), a pressure-sensitive adhesive layer (9) is formed on the surface of the release layer (10) by coating pressure-sensitive adhesive and drying, and the release layer (10) is adhered to the metal layer (8) through the pressure-sensitive adhesive layer (9) to obtain the high-visual-contrast reflective film.

2. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the resin liquid A in the step (1) and the resin liquid B in the step (6) are acrylic resin, fluorine-modified acrylic resin, polyvinyl butyral resin or aliphatic polyurethane resin, wherein the resin liquid B contains color.

3. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the thickness of the surface layer (1) in the step (1) is 20-80 micrometers, the drying temperature of the oven is 50-150 ℃, and the drying time of the oven is 3-6 minutes.

4. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the thermoplastic resin in the step (2) is one or a mixture of more than two of acrylic thermoplastic resin, polyurethane thermoplastic resin, cellulose acetate and PVC resin.

5. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the thickness of the printing block (2) in the step (2) is 1-6 microns.

6. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the particle size of the glass beads in the step (4) is 40-60 micrometers, the sedimentation rate of the glass beads is 55-75%, the distance between the bottom ends of the glass beads and the top end of the printing block (2) is 1-5 micrometers, the power of the UV lamp is 5000-12000 watts, and the irradiation time is 30-120 seconds.

7. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the single-sided adhesive tape (5) in the step (5) is an organic silicon pressure-sensitive adhesive tape, and the stripping force of the single-sided adhesive tape (5) is 500 g/cm-1000 g/cm.

8. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the color layer (7) in the step (6) is a thermosetting acrylic resin layer, the drying temperature is 70-155 ℃, and the drying time is 5-15 minutes.

9. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the thickness of the color layer thin portion (71) in the step (6) is 28-38 μm, and the thickness of the color layer thick portion (72) is 42-71 μm.

10. The method for manufacturing a reflective film with high visual contrast according to claim 1, wherein: the pressure-sensitive adhesive layer (9) in the step (8) is an acrylic pressure-sensitive adhesive layer, the thickness of the pressure-sensitive adhesive layer (9) is 30-60 micrometers, the drying temperature is 60-110 ℃, and the drying time is 2-5 minutes.

Technical Field

The invention relates to a method for manufacturing a reflective film, in particular to a method for manufacturing a reflective film with high visual contrast.

Background

The reflective film is a retroreflective material which is made into a film and can be directly applied, and can effectively reflect incident light so as to remind pedestrians and drivers of the current road conditions, object outlines and the like, so that the reflective film is commonly used in the traffic safety field of warning labels and the like. At present, generally, the conventional reflective film is mainly used for printing patterns and watermarks in a coating or carrying out some anti-counterfeiting marks by utilizing laser etching, the methods have lower technical thresholds relatively, the relative ratio is easy to imitate and alter, the visible contrast in a unit interval of a product is low, strong contrast parallax is not easy to exist, the warning effect is poor, and the improvement is needed.

Disclosure of Invention

The invention provides a novel method for manufacturing a reflective film with high visual contrast, aiming at the defects that the anti-counterfeiting mark technology in the prior art has lower threshold, the relative ratio is easier to imitate and alter, the visual contrast in a unit interval of a product is low, strong contrast parallax is not easy to exist, the warning effect is poorer, and the like.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a method for manufacturing a reflective film with high visual contrast comprises the following steps:

(1) taking a base material, coating the resin liquid A on the surface of the base material, and drying the base material in an oven to obtain a surface layer;

(2) transferring the thermoplastic resin onto the surface layer by using a printing plate roller engraved with characters or patterns, thereby obtaining a printing block on the surface layer;

(3) coating UV resin liquid on one side of the surface layer printed with the printing block, and forming a UV resin layer on the surface of the surface layer, wherein the UV resin layer covers the printing block;

(4) transferring the glass beads onto the UV resin layer through a bead planting device, and then irradiating the glass beads through a UV lamp to obtain a glass bead layer;

(5) bonding the single-sided adhesive tape with the UV resin layer and the glass bead layer, and taking the printing blocks and the parts, corresponding to the printing blocks, on the UV resin layer and the glass bead layer away by the single-sided adhesive tape, so as to obtain a layer of hollow glass bead blocks on the surface of the surface layer;

(6) coating a resin liquid B on the surfaces of the hollow glass bead block and the surface layer through a coating machine, drying and curing the resin liquid B to form a color layer, forming a color layer thin part above the hollow glass bead block by the color layer, and forming a color layer thick part at the position of the non-hollow glass bead block by the color layer;

(7) carrying out vacuum evaporation on the surface of the color layer by using a vacuum evaporation machine, and forming a metal layer on the surface of the color layer;

(8) and taking release paper or a release film to form a release layer, coating a pressure-sensitive adhesive on the surface of the release layer, drying to form a pressure-sensitive adhesive layer, and bonding the release layer with the metal layer through the pressure-sensitive adhesive layer to obtain the high-visual-contrast reflective film.

The surface layer obtained in the step (1) can play a supporting role, so that powerful foundation support is provided for subsequent steps, and meanwhile, the surface layer serving as the outermost layer also plays a role in protecting the inner layer structure and improving the aging resistance and radiation resistance of the product. In the step (2), the thermoplastic resin is coated on the surface layer in a printing mode, so that the production speed can be greatly increased, the production efficiency is improved, meanwhile, the printing plate roller is provided with patterns or characters which can be customized, so that the transferred thermoplastic resin is also provided with the patterns or characters, and the printing block is made of the thermoplastic material, so that the adhesion force between the printing block and the surface layer is very low, which lays a foundation for obtaining the hollow glass bead block subsequently, and the anti-counterfeiting characteristic is greatly improved. And (3) coating the UV resin liquid on one side printed with the printing block on the surface layer so as to provide support for fixing the subsequent glass beads, and simultaneously, well bonding the UV resin liquid and the glass beads to prevent the beads from falling off so as to avoid reducing the performance of the product. Step (4) through plant the pearl device with the even transfer of glass microballon to the UV resin layer, illumination through the UV lamp can be more accurate control glass microballon sink into the degree of depth on the UV resin layer to guarantee that the product has better contrary reflectance and improve the visual contrast of product. And (5) taking away and separating the printing block and the UV resin layer and the glass beads above the printing block by using the adhesiveness of the single-sided adhesive tape, so as to obtain a hollow structure. And (6) coating a layer of colored resin liquid B on the surfaces of the hollow glass bead block and the surface layer to obtain a color layer, wherein the color concentration of the color layer is different due to the difference of the thickness of the color layer thin part and the color layer thick part of the color layer, so that the contrast of the finally obtained reflective film is further improved. And (7) forming a metal layer with high purity and compactness on the surface of the color layer in a vacuum evaporation mode, and reflecting incident light back through the metal layer so as to realize the retro-reflection effect of the reflective film. And (8) attaching a release layer with a pressure-sensitive adhesive layer on the metal layer, so that the obtained reflective film can be attached to different substrates when in use, and the use and operation are more convenient.

The steps are mutually matched, and the high-visual-contrast reflective film is obtained by selectively deducting the color depth contrast in the interval through the glass beads, so that the visual contrast under the condition of dark light can be effectively enhanced, the warning effect is enhanced, the personal safety is ensured, the anti-counterfeiting technical threshold is improved, and the anti-counterfeiting and falsification are more difficult.

Preferably, in the above method for producing a reflective film with high visual contrast, the resin solution a in the step (1) and the resin solution B in the step (6) are acrylic resin, fluorine-modified acrylic resin, polyvinyl butyral resin, or aliphatic polyurethane resin, and the resin solution B contains a color.

Because the reflective film product is generally used outdoors more, the resin can ensure that the product has better weather resistance and chemical resistance, and the resin has better transparency, thereby reducing the condition that the visual contrast of the whole product is weakened due to the transparency problem of the resin and avoiding influencing the product performance.

Preferably, in the method for manufacturing the reflective film with high visual contrast, the thickness of the surface layer in the step (1) is 20-80 micrometers, the drying temperature of the oven is 50-150 ℃, and the drying time of the oven is 3-6 minutes.

The surface layer is made of the thickness and dried by the oven temperature and the oven drying time, so that the surface layer has better supporting performance.

Preferably, in the method for manufacturing a reflective film with high visual contrast, the thermoplastic resin in the step (2) is one or a mixture of two or more of an acrylic thermoplastic resin, a polyurethane thermoplastic resin, cellulose acetate and a PVC resin.

The resin can better control the adhesive force between the printing block and the surface layer, and the too large or too small adhesive force can easily cause the poor contrast visibility of the reflective film due to the poor removal of the printing block, the UV resin layer and the glass beads above the printing block, and the product appearance and performance are affected.

Preferably, in the method for manufacturing a reflective film with high visual contrast, the thickness of the printing block in the step (2) is 1-6 μm.

The condition that the UV resin layer and the glass beads above the printing block corresponding to the printing block cannot be completely or cannot be removed can be caused when the thickness of the printing block is less than 1 micron, and the printing block is larger than 6 microns, so that the printing block is too thick, the problem that the product performance is reduced due to the fact that the depth of the subsequent glass beads trapped in the UV resin layer is uneven is solved.

Preferably, in the manufacturing method of the reflective film with high visual contrast, the particle size of the glass beads in the step (4) is 40-60 micrometers, the sedimentation rate of the glass beads is 55% -75%, the distance between the bottom ends of the glass beads and the top end of the printing block is 1-5 micrometers, the power of the UV lamp is 5000-12000W, and the irradiation time is 30-120 seconds.

The particle size of the glass beads is selected to be 40-60 micrometers, the power of a UV lamp is selected to be 5000-12000W, the irradiation time is 30-120 seconds, the sinking speed of the glass beads in the UV resin layer can be better controlled, the sinking depth (sedimentation rate) of the glass beads in the UV resin layer can be better controlled, when the sedimentation rate of the UV resin layer is less than 55%, the situation that the glass beads are sunk into the UV resin layer too shallowly to cause the glass beads to fall off is easily caused, and when the sedimentation rate is higher than 75%, the situation that the printed block, the UV resin layer above the printed block and the glass beads are difficult to separate after the single-sided adhesive tape is attached is easily caused.

Preferably, in the method for manufacturing the reflective film with high visual contrast, the single-sided adhesive tape in the step (5) is an organic silicon pressure-sensitive adhesive tape, and the peeling force of the single-sided adhesive tape is 500 g/cm-1000 g/cm.

The organic silicon pressure-sensitive adhesive tape has better cohesive strength, higher holding viscosity and higher peeling strength, is not easy to glue residue after being peeled off, and can better take away the printing block and the parts corresponding to the printing block on the UV resin layer and the glass bead layer.

Preferably, in the method for manufacturing a reflective film with high visual contrast, the color layer in the step (6) is a thermosetting acrylic resin layer, the drying temperature is 70-155 ℃, and the drying time is 5-15 minutes.

The thermosetting acrylic resin has the advantages of excellent fullness, gloss and hardness, no discoloration and no yellowing during high-temperature baking, and can make the color of a color layer more stable.

Preferably, in the above method for manufacturing a reflective film with high visual contrast, the thickness of the thin color layer in step (6) is 28-38 μm, and the thickness of the thick color layer is 42-71 μm.

The thin portion of colour layer selects for use foretell thickness scope with colour thickness portion, makes the thin department brighter, the thick department darker, can effectively strengthen the visual contrast nature under the darker condition of light to the warning effect has been strengthened, thereby can further guarantee personal safety.

Preferably, in the manufacturing method of the reflective film with high visual contrast, the pressure-sensitive adhesive layer in the step (8) is an acrylic pressure-sensitive adhesive layer, the thickness of the pressure-sensitive adhesive layer is 30-60 micrometers, the drying temperature is 60-110 ℃, and the drying time is 2-5 minutes.

The acrylic pressure-sensitive adhesive has strong adaptability during coating, high drying speed, strong adhesive force to the surface of an object, good leveling property and transparency, and the adhesion effect of the pressure-sensitive adhesive layer can be better by selecting the thickness, the material, the drying temperature and the drying time.

Drawings

FIG. 1 is a schematic view of a structure of a glass bead layer formed in the present invention;

FIG. 2 is a schematic view of the structure of the present invention when a single-sided adhesive tape is bonded;

FIG. 3 is a schematic view of a structure of a hollow glass bead block according to the present invention;

FIG. 4 is a schematic structural diagram of a color layer formed in the present invention;

FIG. 5 is a schematic structural diagram of a metal layer formed in the present invention;

fig. 6 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be described in further detail below with reference to the accompanying figures 1-6 and the detailed description, but they are not intended to limit the invention: