Laser etching film

Abstract

The utility model discloses a laser etching film which comprises a protective layer, a metal coating, a texture layer, a base material layer and a gum layer which are connected in sequence, and the thickness of the metal coating is 0.01-1 mu m. According to the utility model, through the multi-layer structural design, the metal coating is ablated by laser and the color of the texture layer is revealed during use, so that the laser etching effect is realized, the use of laser developing paint is avoided, and the cost is greatly reduced. During laser etching, light firstly reaches the protective layer and then reaches the metal coating, and selective ablation can be realized by controlling the energy and pulse width of laser. The thickness of the metal coating is very thin, the metal coating is easy to vaporize to form an etching track under the ablation action of laser, and meanwhile, due to the fact that the required laser energy is low and the power is below 5W, the label printing speed is higher, and the label printing efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of label films, in particular to a laser etching film. Background Art

[0002] Traditional nameplates or labels are mainly made of metal materials. When preparing, the metal material needs to be die-cut first to obtain a nameplate or label with the required size, and then the content is printed or engraved on the surface to make the required nameplate or label. Finally, the metal nameplate or label needs to be fixed at the four corners with four rivets or welded to the mechanical equipment. Because this fixing method is more cumbersome, flexible labels have appeared on the market.

[0003] The main material of the flexible label is polymer film, which can significantly increase the die-cutting speed of the label and reduce the die-cutting cost. The back of the label has its own adhesive, and no rivets are required. It can be directly pasted on the designated surface, which significantly improves efficiency.

[0004] Among flexible labels, laser etching is technically difficult. In order to achieve marking, laser color-developing paint is used, which changes color under the action of laser. However, this kind of paint is technically difficult and expensive, so improvements need to be made to the above problems. Summary of the invention

[0005] The utility model provides a new laser etching film to solve the defects of the laser color developing coating technology in the prior art, such as great difficulty and high price.

[0006] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0007] A laser etching film comprises a protective layer, a metal plating layer, a texture layer, a substrate layer and a back adhesive layer which are connected in sequence, wherein the thickness of the metal plating layer is 0.01 μm to 1 μm.

[0008] Laser etched film is the material used for laser labels. There is no content recorded on the original surface of the laser etched film. After printing by a laser marking machine, the marking content is recorded on the surface of the etched film to obtain a label.

[0009] The utility model adopts a multi-layer structure design. When in use, the laser ablates the metal coating to reveal the color of the texture layer, thereby achieving a laser etching effect and avoiding the use of laser color-developing paint, which greatly reduces the cost of the utility model. During laser etching, the light first reaches the protective layer and then reaches the metal coating. By controlling the energy and pulse width of the laser, selective ablation can be achieved. The thickness of the metal coating is very thin and it is easy to vaporize under the ablation of the laser to form an etching track. At the same time, because the required laser energy is relatively low, the power is less than 5W, so the label printing speed of the utility model is faster and more efficient.

[0010] The protective layer has the properties of wear resistance and pollution resistance, and also has excellent anti-aging performance and water and oxygen barrier performance. The utility model has glossiness, and has the properties of scratch resistance, wear resistance and pollution resistance. The protective layer also has good adhesion to the metal coating. The metal coating has a strong light reflection effect, which can show the metal morphology of the coating. The texture layer has a decorative effect and also has good adhesion to the metal coating. The substrate layer is the basic structural layer of the utility model and plays a bearing role. The adhesive layer is used to attach the utility model to the surface of more machines, equipment, and workpieces, and ensure the fastness of the attachment.

[0011] When cutting, the utility model can adjust the control program, increase the laser power, and directly cut the entire film material without die-cutting. The label of the utility model has anti-counterfeiting and self-destruction properties, which effectively prevents the label from being tampered with and replaced later. Anti-counterfeiting is to prepare anti-counterfeiting marks on the surface of the etched film by printing or laser engraving. The self-destructive property is reflected in that the label of the utility model cannot be reused after the first pasting, because the label will be destroyed during the peeling process, and the marked content will be damaged, thereby achieving self-destruction and information tamper-proofing. The utility model can print black fonts on a silver surface, and the font color can also be customized to achieve label differentiation.

[0012] Preferably, in the above-mentioned laser etching film, the metal coating is formed by vacuum evaporation deposition.

[0013] Vacuum evaporation technology can ensure the uniform distribution of metal coating on the surface of the substrate, forming a continuous and defect-free film. Through vacuum evaporation deposition, the adhesion between the metal coating and other layers is enhanced, improving the stability and durability of the overall structure. Vacuum evaporation deposition technology allows precise control of the thickness of the metal coating, which helps to achieve the fineness and depth control of laser etching. The metal coating has a high reflectivity, which can improve the visual effect of the label and make the color of the texture layer after laser etching more vivid. Compared with traditional electroplating or chemical plating, vacuum evaporation technology can reduce material waste and environmental pollution, while reducing production costs.

[0014] Preferably, in the laser etching film described above, the material of the metal coating is aluminum, nickel, copper or stainless steel.

[0015] A variety of metal materials are available to meet the needs of more application scenarios and increase the applicability and flexibility of the product. Metal materials such as aluminum, nickel, copper and stainless steel have good corrosion resistance, which can improve the durability of laser etching films in various environments. Moreover, these metal materials have high reflectivity, which helps to improve the visual effect after laser etching and make the etched pattern clearer and more visible. These metal materials have good ductility and formability during processing, which is conducive to achieving high-precision laser etching effects. These metal materials have good thermal stability at high temperatures, which helps to maintain the stability of the material during laser etching and reduce thermal deformation.

[0016] Preferably, in the laser etching film described above, the thickness of the protective layer is 3 μm to 20 μm, and the protective layer is a UV coating of a polyurethane acrylate system.

[0017] The thickness of the protective layer is in the range of 3μm to 20μm, which provides better physical protection and enhances the wear resistance of the laser etched film. The UV coating of the polyurethane acrylate system has good chemical corrosion resistance and can resist the erosion of a variety of chemicals. The UV coating can effectively block ultraviolet rays, protect the laser etched film from aging and fading caused by ultraviolet rays, and extend the service life of the laser etched film. The UV coating usually has a high gloss, which can improve the surface aesthetics of the laser etched film. The UV coating of the polyurethane acrylate system has strong adhesion to the metal coating, ensuring the stability of the overall structure. The protective layer can prevent the penetration of pollutants and maintain the cleanliness and clarity of the laser etched film. The protective layer can block moisture and oxygen, prevent the laser etched film from being eroded by water and oxygen, and maintain the long-term stability of the laser etched film. The UV coating of the polyurethane acrylate system has good temperature resistance and is suitable for more environmental conditions.

[0018] Preferably, in the above-mentioned laser etching film, the thickness of the texture layer is 5μm to 20μm, the texture depth of the texture layer is 1μm to 10μm, the texture of the texture layer is a metal brushed texture or a metal frosted texture, and the material of the texture layer is a UV resin containing 1% to 10% UV color paste.

[0019] Precise control of the thickness and depth of the texture layer provides a fine decorative effect and enhances the visual appeal of the product. Metal brushed texture and metal frosted texture provide a variety of surface treatment options to meet more needs. The texture depth design of the texture layer increases the three-dimensional and layered sense of the product and enhances the appearance texture of the product. The specific thickness and material of the texture layer combined with laser etching technology can achieve a clear marking effect. The UV resin material containing 1% to 10% UV color paste allows the color of the texture layer to be changed, increasing the diversity of the product. The UV resin has good adhesion to the metal plating layer and the substrate layer, ensuring the stability of the overall structure. The rapid curing characteristics of UV resin improves production efficiency and is suitable for large-scale production. No harmful substances are produced during the curing process of UV resin, which meets environmental protection requirements. UV resin has good anti-aging properties and extends the service life of the product. The thickness and material of the texture layer can be adjusted according to different application requirements to adapt to more usage environments.

[0020] Preferably, in the laser etching film described above, the thickness of the substrate layer is 30 μm to 100 μm, and the material of the substrate layer is PET, PC or acrylic.

[0021] The thickness range of the substrate layer provides sufficient physical strength and structural stability, ensuring the overall durability and reliability of the laser etched film. PET, PC, and acrylic achieve more application requirements. PET, PC, and acrylic have good transparency and glossiness, which helps to improve the appearance quality of the final product. PET, PC, and acrylic are easy to process and more convenient for subsequent processing. PET, PC, and acrylic have good chemical corrosion resistance and can resist chemicals that may be encountered in daily use. PET, PC, and acrylic can remain stable over a wide range of temperatures and are suitable for use in more environmental conditions. PET, PC, and acrylic are widely used in industrial production and have good cost-effectiveness, which helps to reduce production costs. PET, PC, and acrylic are easy to recycle after being discarded, which helps to reduce the impact on the environment. The thickness and material of the substrate layer provide good impact resistance, allowing the product to withstand a certain degree of physical impact. The substrate layer has thermal stability to avoid deformation due to temperature changes during laser etching. The low density of PET, PC, and acrylic makes the laser etched film light, easy to carry and use. The thickness of the substrate layer can be adjusted according to different usage requirements to adapt to different loads and application conditions. The material of the substrate layer has good compatibility with the protective layer, metal plating layer, texture layer and adhesive layer, ensuring the integrity and functionality of the overall structure.

[0022] Preferably, in the laser etching film described above, the thickness of the back adhesive layer is 20 μm to 40 μm, and a release layer is provided on the outer surface of the back adhesive layer.

[0023] The adhesive layer provides sufficient adhesion in the above thickness range to ensure that the laser etched film can be firmly attached to various surfaces. The presence of the release layer protects the adhesive layer from contamination and damage, maintains its stickiness, and prolongs the product life. The thickness and material of the adhesive layer can be adjusted according to different pasting surfaces and environmental conditions to achieve the best pasting effect. The adhesive layer in the above thickness range helps to reduce the generation of air bubbles during the pasting process and ensure smooth label adhesion.

[0024] Preferably, the above-mentioned method for preparing a laser-etched film comprises the following steps:

[0025] S1, taking a substrate layer, and performing UV transfer processing on the upper surface of the substrate layer to obtain a texture layer, wherein the texture layer is made of a UV resin containing 1% to 10% UV color paste;

[0026] S2, performing vacuum evaporation deposition on the surface of the texture layer to obtain a metal coating;

[0027] S3, coating the surface of the metal coating to form a protective layer;

[0028] S4, performing back glue treatment on the lower surface of the substrate layer, and then laminating the release layer to form a back glue layer to obtain a laser etching film.

[0029] The texture layer is quickly obtained through UV transfer processing, which improves production efficiency and shortens the production cycle. UV transfer technology allows precise control of the thickness and pattern of the texture layer, ensuring the consistency and high quality of the product. The use of UV resin containing 1% to 10% UV color paste as the texture layer material ensures compatibility with subsequent processes. The UV color paste in the UV resin provides customizable color options, which can change the label font color and enhance the decorative effect of the product. Through the multi-layer structure design, the organic combination of the protective layer, the metal plating layer and the texture layer is achieved, and the overall performance is improved. Compared with traditional solvent-based coatings, UV curing technology is more environmentally friendly and reduces VOCs emissions. The various steps in the preparation method are suitable for automated production lines, which improves production efficiency and reduces labor costs. The rapid curing characteristics of UV resin speed up the production process and increase the production speed. The utility model reduces production costs while ensuring product quality through an optimized preparation process. When in use, by adjusting the laser power, the film material can be directly cut without the need for an additional die-cutting process, thereby improving the efficiency of use.

[0030] Preferably, in the above-mentioned method for preparing a laser etching film, in step S2, vacuum evaporation deposition adopts roll-to-roll vacuum plating equipment, and in step S3, coating adopts micro-concave coating method.

[0031] Roll-to-roll vacuum plating equipment supports continuous production, improving production efficiency and output. Roll-to-roll equipment can ensure the uniform distribution of metal coating on the substrate, avoiding the problem of local over-thickness or over-thinness. The roll-to-roll process allows production at a higher speed, shortening the production time of a single product. Roll-to-roll equipment reduces material waste and improves material utilization. Roll-to-roll equipment is usually combined with an automated control system to reduce manual intervention and reduce human errors. The micro-concave coating method can accurately control the coating amount to ensure the uniformity and consistency of the protective layer. The micro-concave coating technology provides a smooth and bubble-free coating surface, improving the appearance and performance of the final product. The micro-concave coating method is suitable for more viscosity coatings and increases the adaptability of the process. Micro-concave coating reduces defects that may occur during the coating process, such as orange peel effect or pinholes. Roll-to-roll vacuum plating and micro-concave coating processes reduce the use of solvents and are more environmentally friendly. Roll-to-roll equipment and micro-concave coating technology are easy to expand to a larger production scale and improve production efficiency. Roll-to-roll equipment can adapt to materials of more widths and shapes, improving the applicability of production.

[0032] Preferably, in the above-mentioned method for preparing a laser etching film, in step S1, the UV transfer speed is 8m / min to 10m / min, and in step S2, the coating speed of vacuum evaporation deposition is 200m / min to 300m / min.

[0033] The high speed of UV transfer and vacuum evaporation ensures the rapid progress of the production process and significantly improves production efficiency. Fast transfer and coating speeds reduce the residence time of a single product on the production line and shorten the overall production cycle. Increasing the speed can increase production without increasing equipment and manpower, which helps to reduce the production cost per unit product. Carrying out UV transfer and vacuum evaporation at speeds in the above range helps to maintain the uniformity of the coating and the quality of the texture layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0036] Example 1

[0037] A laser etching film comprises a protective layer 1, a metal coating layer 2, a texture layer 3, a substrate layer 4, and a back adhesive layer 5 which are connected in sequence, wherein the thickness of the metal coating layer 2 is 0.01 μm.

[0038] Preferably, the metal coating 2 is formed by vacuum evaporation deposition.

[0039] Preferably, the metal coating 2 is made of aluminum, nickel, copper or stainless steel.

[0040] Preferably, the thickness of the protective layer 1 is 3 μm, and the protective layer 1 is a UV type coating of a polyurethane acrylate system.

[0041] Preferably, the thickness of the texture layer 3 is 5 μm, the texture depth of the texture layer 3 is 1 μm, the texture of the texture layer 3 is a metal brushed texture or a metal frosted texture, and the material of the texture layer 3 is a UV resin containing 1% UV color paste.

[0042] Preferably, the thickness of the substrate layer 4 is 30 μm, and the material of the substrate layer 4 is PET, PC or acrylic.

[0043] Preferably, the thickness of the adhesive layer 5 is 20 μm, and a release layer is provided on the outer surface of the adhesive layer 5 .

[0044] Preferably, a method for preparing a laser-etched film comprises the following steps:

[0045] S1, taking a substrate layer 4, and performing UV transfer processing on the upper surface of the substrate layer 4 to obtain a texture layer 3, wherein the material of the texture layer 3 is a UV resin containing 1% UV color paste;

[0046] S2, performing vacuum evaporation deposition on the surface of the texture layer 3 to obtain a metal coating 2;

[0047] S3, coating the surface of the metal coating 2 to form a protective layer 1;

[0048] S4, performing back adhesive treatment on the lower surface of the substrate layer 4, and then laminating the release layer to form a back adhesive layer 5, thereby obtaining a laser etching film.

[0049] Preferably, in step S2, vacuum evaporation deposition is performed using roll-to-roll vacuum plating equipment, and in step S3, coating is performed using a micro-concave coating method.

[0050] Preferably, in step S1, the UV transfer speed is 8 m / min, and in step S2, the coating speed of vacuum evaporation deposition is 200 m / min.

[0051] Example 2

[0052] A laser etching film comprises a protective layer 1, a metal coating layer 2, a texture layer 3, a substrate layer 4, and a back adhesive layer 5 which are connected in sequence, wherein the thickness of the metal coating layer 2 is 1 μm.

[0053] Preferably, the metal coating 2 is formed by vacuum evaporation deposition.

[0054] Preferably, the metal coating 2 is made of aluminum, nickel, copper or stainless steel.

[0055] Preferably, the protective layer 1 has a thickness of 20 μm and is a UV coating of a polyurethane acrylate system.

[0056] Preferably, the thickness of the texture layer 3 is 20 μm, the texture depth of the texture layer 3 is 10 μm, the texture of the texture layer 3 is a metal brushed texture or a metal frosted texture, and the material of the texture layer 3 is a UV resin containing 10% UV color paste.

[0057] Preferably, the thickness of the substrate layer 4 is 100 μm, and the material of the substrate layer 4 is PET, PC or acrylic.

[0058] Preferably, the thickness of the adhesive layer 5 is 40 μm, and a release layer is disposed on the outer surface of the adhesive layer 5 .

[0059] Preferably, a method for preparing a laser-etched film comprises the following steps:

[0060] S1, taking a substrate layer 4, and performing UV transfer processing on the upper surface of the substrate layer 4 to obtain a texture layer 3, wherein the material of the texture layer 3 is a UV resin containing 10% UV color paste;

[0061] S2, performing vacuum evaporation deposition on the surface of the texture layer 3 to obtain a metal coating 2;

[0062] S3, coating the surface of the metal coating 2 to form a protective layer 1;

[0063] S4, performing back adhesive treatment on the lower surface of the substrate layer 4, and then laminating the release layer to form a back adhesive layer 5, thereby obtaining a laser etching film.

[0064] Preferably, in step S2, vacuum evaporation deposition is performed using roll-to-roll vacuum plating equipment, and in step S3, coating is performed using a micro-concave coating method.

[0065] Preferably, in step S1, the UV transfer speed is 10 m / min, and in step S2, the coating speed of vacuum evaporation deposition is 300 m / min.

[0066] Example 3

[0067] A laser etching film comprises a protective layer 1, a metal coating layer 2, a texture layer 3, a substrate layer 4, and a back adhesive layer 5 which are connected in sequence, wherein the thickness of the metal coating layer 2 is 0.505 μm.

[0068] Preferably, the metal coating 2 is formed by vacuum evaporation deposition.

[0069] Preferably, the metal coating 2 is made of aluminum, nickel, copper or stainless steel.

[0070] Preferably, the thickness of the protective layer 1 is 11.5 μm, and the protective layer 1 is a UV coating of a polyurethane acrylate system.

[0071] Preferably, the thickness of the texture layer 3 is 12.5 μm, the texture depth of the texture layer 3 is 5.5 μm, the texture of the texture layer 3 is a metal brushed texture or a metal frosted texture, and the material of the texture layer 3 is a UV resin containing 5.5% UV color paste.

[0072] Preferably, the thickness of the substrate layer 4 is 65 μm, and the material of the substrate layer 4 is PET, PC or acrylic.

[0073] Preferably, the thickness of the adhesive layer 5 is 30 μm, and a release layer is disposed on the outer surface of the adhesive layer 5 .

[0074] Preferably, a method for preparing a laser-etched film comprises the following steps:

[0075] S1, taking a substrate layer 4, and performing UV transfer processing on the upper surface of the substrate layer 4 to obtain a texture layer 3, wherein the material of the texture layer 3 is a UV resin containing 5.5% UV color paste;

[0076] S2, performing vacuum evaporation deposition on the surface of the texture layer 3 to obtain a metal coating 2;

[0077] S3, coating the surface of the metal coating 2 to form a protective layer 1;

[0078] S4, performing back adhesive treatment on the lower surface of the substrate layer 4, and then laminating the release layer to form a back adhesive layer 5, thereby obtaining a laser etching film.

[0079] Preferably, in step S2, vacuum evaporation deposition is performed using roll-to-roll vacuum plating equipment, and in step S3, coating is performed using a micro-concave coating method.

[0080] Preferably, in step S1, the UV transfer speed is 9 m / min, and in step S2, the coating speed of vacuum evaporation deposition is 250 m / min.

[0081] Example 4

[0082] The laser etched films obtained in the above embodiments and the existing Astatite Technology CA006 laser etched film were taken as a comparative example to test the wear resistance, moisture resistance, heat aging performance and color fastness performance. The test method is as follows:

[0083] 1. Abrasion resistance test: GB / T 25978-2018 "Road Vehicle Signs and Labels" is used for testing. Test method: It should be pasted on the same cardboard substrate provided by the manufacturer of the Taber abrasion tester, using a CS-10 grinding wheel, and the Taber abrasion tester, under a load of 500g, at a speed of 30r / min, for 200 wear cycles.

[0084] 2. Moisture resistance test: GB / T 25978-2018 "Road Vehicle Signs and Labels" is used for testing. Test method: Place the test sample at 40℃±2℃, 100%RH for 144h. After the test, place it in a standard environment for 1h and visually inspect it.

[0085] 3. Thermal aging performance test: GB / T 25978-2018 "Road Vehicle Signs and Labels" is used for testing. Test method: Place at 90℃±2℃ for 1000h, and after the test, place in standard environment for 1h and visually inspect.

[0086] 4. Color fastness performance test: GB / T 25978-2018 "Road Vehicle Signs and Labels" is used for testing. Test method: Place the test sample in an aging box, which uses a xenon lamp as the light source. The front of the test sample is irradiated with light with a wavelength of 300nm to 400nm. The cumulative radiation energy received by the test sample should reach 28MJ / m 2 During the test, the humidity of the aging box was 0% to 20% RH, and the blackboard temperature was 100°C ± 3°C.

[0087] The performance test results are shown in the following table:

[0088] Table 1: Performance test comparison table

[0089]

[0090] Under the same conditions, the printing speed of Examples 1-3 is 2000 mm / s, and the printing speed of the comparative example is 800 mm / s to 1000 mm / s.

[0091] The printing energy required for Examples 1-3 is 20% to 30%, while the comparative example requires 70% to 80%.

[0092] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A laser etched film, characterized in that: It comprises a protective layer (1), a metal plating layer (2), a texture layer (3), a substrate layer (4), and a back adhesive layer (5) which are connected in sequence, wherein the thickness of the metal plating layer (2) is 0.01 μm to 1 μm.

2. A laser etching film according to claim 1, characterized in that: The metal coating (2) is formed by vacuum evaporation deposition.

3. The laser etched film according to claim 1, characterized in that: The material of the metal coating (2) is aluminum, nickel, copper or stainless steel.

4. The laser etched film according to claim 1, characterized in that: The thickness of the protective layer (1) is 3 μm to 20 μm, and the protective layer (1) is a UV type coating of a polyurethane acrylate system.

5. The laser etching film according to claim 1, characterized in that: The thickness of the texture layer (3) is 5 μm to 20 μm, the texture depth of the texture layer (3) is 1 μm to 10 μm, the texture of the texture layer (3) is a metal brushed texture or a metal frosted texture, and the material of the texture layer (3) is a UV resin containing 1% to 10% UV color paste.

6. The laser etching film according to claim 1, characterized in that: The thickness of the substrate layer (4) is 30 μm to 100 μm, and the material of the substrate layer (4) is PET, PC or acrylic.

7. The laser etched film according to claim 1, characterized in that: The thickness of the adhesive layer (5) is 20 μm to 40 μm, and a release layer is provided on the outer surface of the adhesive layer (5).

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