A dark color reflective film with slitting positioning cursor
Patent Information
- Application Number
- CN202522116252.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-30
AI Technical Summary
但若是深色反光膜，定位标与周边反光膜的颜色差异偏小，光电传感器无法感知到，给分切(或激光打标)带来困难
[0012]本实用新型的有益效果是：与现有技术相比，本实用新型结构设计合理，通过面膜层的下表面与植珠层的上表面之间设置紫外荧光定位标和印刷水印层，同时结合现有紫外荧光传感器来识别，使得深色反光膜也能精密分切(或激光打标)，结构设计合理、制造方便、容易被光电传感器感知识别、分切精密且实用性好。
Smart Images
Figure CN224841141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of reflective film technology, specifically to a dark reflective film with a cutting and positioning cursor. Background Technology
[0002] In the production of existing microbead-type reflective films, especially those used for vehicle license plates, manufacturers or customers often request watermark patterns or laser-printed patterns for anti-counterfeiting purposes. Whether printed or laser-printed, the watermark patterns are relatively light, generally gray. For printed watermark patterns, positioning marks are used for easy cutting; for laser-printed watermarks, positioning marks are also needed for accurate positioning of the laser-printed pattern, facilitating final cutting. For light-colored reflective films, dark colors such as black or blue are generally chosen for the positioning marks. The greater the color contrast between the dark dots and the light-colored reflective film, the easier it is for the photoelectric sensor used for cutting (or laser marking) to detect and identify, achieving precise cutting (laser marking). However, for dark-colored reflective films, the color difference between the positioning marks and the surrounding reflective film is too small for the photoelectric sensor to detect, making cutting (or laser marking) difficult. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dark reflective film with a cutting positioning cursor that has a reasonable structural design, is easy to manufacture, is easily detected and identified by photoelectric sensors, has precise cutting and good practicality.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a dark reflective film with a cutting and positioning cursor, comprising a bead layer, a reflective layer, an adhesive backing layer and a release layer, wherein a laser watermark layer is disposed on the reflective layer, and a focusing layer is disposed between the upper surface of the laser watermark layer and the lower surface of the bead layer; A mask layer is disposed on the upper surface of the bead layer, and an ultraviolet fluorescent positioning mark and a printed watermark layer are disposed between the lower surface of the mask layer and the upper surface of the bead layer. A carrier film layer is disposed on the upper surface of the mask layer.
[0005] The present invention is further configured such that: the reflective layer is an aluminum-plated layer with a thickness of 400-1200 nanometers; the laser watermark layer is formed by a laser marking machine scanning a laser onto the upper surface of the reflective layer through a laser head, and the upper surface of the reflective layer forms a laser watermark through laser scanning.
[0006] The present invention is further configured such that: the ultraviolet fluorescent positioning mark is printed by gravure ink, the ink being composed of resin, ultraviolet fluorescent material, solvent and auxiliary materials; wherein the resin is a mixture of one or more resins selected from polyurethane resin, acrylate resin, polyester resin, chloroacetic acid resin, chloroether resin, and aldehyde-ketone resin.
[0007] The present invention is further configured such that the size of the ultraviolet fluorescent positioning mark is between 2mm×2mm and 10mm×10mm.
[0008] The present invention is further configured such that: the printed watermark layer is formed by color gravure printing, and the printed watermark layer is gray, which is made of black ink, solvent and transparent resin.
[0009] The present invention is further configured such that: the bead layer comprises polyacrylate resin and glass microspheres, the glass microspheres are adhered to the polyacrylate resin, the glass microspheres have a refractive index of 2.21 and a particle size of 38-63 micrometers.
[0010] The present invention is further configured such that: the adhesive backing layer is a polyacrylate pressure-sensitive adhesive, the release layer is release paper, the adhesive backing layer is coated on the release layer, and the adhesive backing layer is bonded together with the reflective layer after drying.
[0011] The present invention is further configured such that: the carrier film layer is a PET film or a TPU film, and the thickness of the carrier film layer is 50-75 micrometers.
[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model has a reasonable structural design. By setting an ultraviolet fluorescent positioning mark and a printed watermark layer between the lower surface of the film layer and the upper surface of the bead layer, and combining it with the existing ultraviolet fluorescent sensor for identification, the dark reflective film can also be precisely cut (or laser marked). The structure is reasonable, easy to manufacture, easy to be sensed and identified by photoelectric sensors, and has precise cutting and good practicality.
[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the mask layer in an embodiment of the present invention. Detailed Implementation
[0015] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0016] See Figure 1 and Figure 2 The present invention discloses a dark reflective film with a cutting positioning cursor, comprising a bead layer 1, a reflective layer 2, an adhesive backing layer 3 and a release layer 4. A laser watermark layer 5 is provided on the reflective layer 2, and a focusing layer 6 is provided between the upper surface of the laser watermark layer 5 and the lower surface of the bead layer 1. A mask layer 7 is disposed on the upper surface of the bead layer 1, and an ultraviolet fluorescent positioning mark 8 and a printed watermark layer 9 are disposed between the lower surface of the mask layer 7 and the upper surface of the bead layer 1. A carrier film layer 10 is disposed on the upper surface of the mask layer 7.
[0017] The reflective layer 2 is an aluminum-plated layer with a thickness of 400-1200 nanometers. The laser watermark layer 5 is formed on the upper surface of the reflective layer by a laser marking machine using a laser head.
[0018] The ultraviolet fluorescent positioning mark 8 is printed with gravure ink, which is composed of resin, ultraviolet fluorescent material, solvent and auxiliary materials; wherein the resin is a mixture of one or more resins selected from polyurethane resin, acrylate resin, polyester resin, chloroacetic acid resin, chloroether resin and aldehyde-ketone resin.
[0019] The ink composition mainly consists of resin, ultraviolet fluorescent material, solvent, and auxiliary materials. The resin is a mixture of one or more resins selected from polyurethane resin, acrylate resin, polyester resin, vinyl chloride resin, vinyl chloride ether resin, and aldehyde-ketone resin. It is transparent and adheres well to both the face film layer and the resin layer. A combination of vinyl chloride ether resin and aldehyde-ketone resin is preferred, accounting for 10-25%. The ultraviolet fluorescent powder is predominantly whitish, accounting for 1-5%, with BASF OB being a preferred fluorescent whitening agent. The remainder is solvent with a moderate boiling point, such as butyl acetate or methyl isobutyl ketone. The printing roller is 200 mesh, and the baking temperature is 90℃-135℃ for 1-5 minutes.
[0020] The size of the ultraviolet fluorescent positioning mark 8 is between 2mm×2mm and 10mm×10mm.
[0021] The printed watermark layer 9 is formed by color gravure printing. The printed watermark layer 9 is gray and is made of black ink, solvent and transparent resin.
[0022] The bead layer 1 comprises polyacrylate resin and glass microspheres, with the glass microspheres adhered to the polyacrylate resin. The glass microspheres have a refractive index of 2.21 and a particle size of 38-63 micrometers.
[0023] The adhesive backing layer 3 is a polyacrylate pressure-sensitive adhesive, the release layer 4 is a release paper, the adhesive backing layer 3 is coated on the release layer 4, and after the adhesive backing layer 3 dries, it is bonded together with the reflective layer 2.
[0024] The carrier film layer 10 is a PET film or a TPU film, and the thickness of the carrier film layer 10 is 50-75 micrometers.
[0025] This invention involves printing a watermark on the inner dark surface of a reflective film that requires a watermark, while simultaneously printing fluorescent positioning marks in multiple colors; then, a series of processes are completed to produce the reflective film. The manufacturing process is as follows: Carrier layer + face film layer resin coating and drying (face film layer) + (printing colored ink) watermark / printing UV fluorescent dot marker + bead layer coating and drying + focusing layer resin coating and drying + aluminum plating layer + adhesive backing layer (coated and dried on the release layer and then bonded to the aluminum plating surface) + release carrier film + (face film layer A printing) / (laser printing watermark) + positioning and slitting into finished products.
[0026] Preferably, the mask layer 7 includes a mask surface layer 71, a mask base layer 72, and a mask bottom layer 73.
[0027] Mask Surface Layer 71: After the basic reflective film process is completed, the carrier film is peeled off, and colored ink is printed on the mask base layer 72. Printing methods include screen printing, flexographic printing, and gravure printing. Drying temperature is 70℃-100℃, and time is 2-8 minutes. The ink thickness is 1-5 micrometers, and it is transparent. The ink mainly consists of resin, weather-resistant organic transparent pigments, solvents, and auxiliary materials. The resins mainly include polyacrylate resin, polyurethane resin, polyester resin, aldehyde-ketone resin, chlorinated ether resin, and polyvinyl butyral resin. Polyacrylate resin is preferred.
[0028] Mask base layer 72: Colored ink is added to the mask layer resin, coated onto a carrier film, and then dried. The carrier film is a PET film with a thickness of 50-75 micrometers, which is heat resistant and does not require corona treatment.
[0029] The mask layer resin is one of polyacrylate, polyester resin, or polyvinyl butyral resin, preferably polyester resin. It contains UV absorber 329 (0.1-0.5 parts / 100 parts resin), histamine 770 (0.1-0.5 parts / 100 parts resin), and antioxidant 1010 (0.1-1.0 parts / 100 parts resin). It also contains curing agents such as amino resin (Cytec-325, 6-15 parts / 100 parts) and cellulose acetate butyrate (Eastman 381, 0.5 parts / 100 parts resin). The drying temperature is 90℃-145℃, and the time is 5-10 minutes. The dried thickness is 25-55 micrometers.
[0030] Mask Base Layer 73: The mask base layer 73 is printed with colored ink, generally using gravure printing. The ink mainly consists of transparent resin, weather-resistant organic transparent pigments, solvents, and auxiliary materials. The resins mainly include polyacrylate resin, polyurethane resin, polyester resin, aldehyde-ketone resin, chlorinated ether resin, and polyvinyl butyral resin, etc. Polyacrylate resin is preferred. Drying temperature is 90-135℃, time is 2-5 minutes, and the dry thickness is 0.5-2 micrometers.
[0031] For a specific product, only one method needs to be selected for the mask surface layer 71, mask base layer 72, and mask bottom layer 73; the choice depends on the specific application of the product. For example, for blue car license plates in China, blue ink needs to be printed on the mask surface layer 71; for dark green license plates, green ink needs to be added to the resin in the mask base layer 72, coated, and dried. If the reflective film has a corresponding pattern, it needs to be gravure-printed on the mask bottom layer 73, at which point the mask layer has already been coated and dried.
[0032] If it is laser watermarking, the watermark is printed according to the positioning mark after the carrier film is peeled off, and then it is cut. A laser marking machine uses a laser head to scan the surface of reflective layer 2, etching the aluminum plating layer through the surface layer, bead layer, and focusing layer of reflective layer 2. The etched aluminum plating layer appears gray when viewed from the surface of reflective layer 2. The laser head power is 20W, and the wavelength is 1064nm.
[0033] As an excellent process, watermarks and dot marks are also printed after the film layer is completed, located between the film layer and the resin layer. Since there is a specified spacing between the watermarks and dot marks, they are completed by color gravure printing.
[0034] The bead layer 1 is formed by coating and drying a mixture of polyacrylate resin, isocyanate resin, and solvent. The polyacrylate resin contains hydroxyl groups, and the isocyanate resin can be biuret, added at a rate of 8-12 parts per 100 parts of resin, or Asahi Kasei's E405-80T, added at a rate of 16-22 parts per 100 parts of resin. After coating and drying, high-refractive-index glass microspheres adhere to the coating. The high-refractive-index glass microspheres have a refractive index of 2.21 and particle sizes of 38-45 micrometers, 45-53 micrometers, and 53-63 micrometers, with different particle sizes selected according to different product requirements. The thickness of the dried adhesive coating is 12-24 micrometers; the larger the microsphere particle size, the thicker the coating. The glass microspheres are embedded in the adhesive layer, with a portion exposed above the adhesive, accounting for 10-50% of the microsphere particle size. The drying temperature is 70-150℃, and the time is 5-10 minutes.
[0035] The focusing layer resin is either polyacrylate resin or polyvinyl butyral resin. Polyacrylate resin is preferred, with Cytec 325 amino resin added at a rate of 3-8 parts per 100 parts of resin. The resin is coated onto the bead layer and dried at 70-150°C for 3-10 minutes, resulting in a dry thickness of 8-20 micrometers. The dry thickness will vary depending on the particle size of the glass microspheres.
[0036] The focused reflective film is placed in a vacuum chamber and evacuated to 10°C. -2 -10 -5 Pa, then the aluminum wire is heated, volatilized into aluminum vapor, and the reflective film is wound up and down, condensing the aluminum vapor on the focusing layer to form an aluminum film. The thickness is 300-1200 Å.
[0037] Peeling the carrier film: peeling speed 5-25 meters / minute, carrier film rewinding.
[0038] In practical applications, ultraviolet fluorescent dot markers require a dedicated ultraviolet sensor to excite the fluorescent material to emit light and enable identification. The sensor is connected to a laser marking machine or slitting machine to perform laser marking and slitting.
[0039] Working principle: Emission: The sensor emits a beam of ultraviolet light of a specific wavelength (usually long-wave UVA, such as 365nm, which is relatively safe).
[0040] Excitation: This UV light shines on the target object containing fluorescent material.
[0041] Emission: When fluorescent materials are excited, they absorb UV energy and immediately release another type of visible light with a longer wavelength (such as bright green, blue, or yellow).
[0042] Reception: The photodetector inside the sensor (usually equipped with a filter) specifically detects this particular visible light, while ignoring the weak UV light reflected back.
[0043] This invention uses an ultraviolet fluorescent positioning mark and a printed watermark layer between the lower surface of the mask layer and the upper surface of the bead layer, combined with an existing ultraviolet fluorescent sensor for identification, so that even dark reflective films can be precisely cut (or laser marked). The structure is reasonable, easy to manufacture, easily detected and identified by photoelectric sensors, and has precise cutting and good practicality.
[0044] The above description of the specific embodiments of this utility model is only used to further illustrate this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made to this utility model by technical engineers based on the above description of the utility model shall fall within the scope of protection of this utility model.
Claims
1. A dark reflective film with a slit positioning cursor, comprising a bead layer (1), a reflective layer (2), an adhesive backing layer (3), and a release layer (4), characterized in that: A laser watermark layer (5) is provided on the reflective layer (2), and a focusing layer (6) is provided between the upper surface of the laser watermark layer (5) and the lower surface of the bead layer (1). A mask layer (7) is provided on the upper surface of the bead layer (1), and an ultraviolet fluorescent positioning mark (8) and a printed watermark layer (9) are provided between the lower surface of the mask layer (7) and the upper surface of the bead layer (1). A carrier film layer (10) is provided on the upper surface of the mask layer (7).
2. The dark reflective film with a slit positioning cursor according to claim 1, characterized in that: The reflective layer (2) is an aluminum-plated layer with a thickness of 400-1200 nanometers. The laser watermark layer (5) is formed by a laser marking machine scanning the laser onto the upper surface of the reflective layer through a laser head. The upper surface of the reflective layer (2) is formed by laser scanning.
3. The dark reflective film with a slit positioning cursor according to claim 2, characterized in that: The ultraviolet fluorescent positioning mark (8) is printed by gravure ink, which is composed of resin, ultraviolet fluorescent material, solvent and auxiliary materials; wherein the resin is a mixture of one or more resins selected from polyurethane resin, acrylate resin, polyester resin, chloroacetic acid resin, chloroether resin and aldehyde-ketone resin.
4. A dark reflective film with a slit positioning cursor according to claim 3, characterized in that: The size of the ultraviolet fluorescent positioning mark (8) is between 2mm×2mm and 10mm×10mm.
5. A dark reflective film with a slit positioning cursor according to claim 4, characterized in that: The printed watermark layer (9) is formed by color gravure printing. The printed watermark layer (9) is gray and is made of black ink, solvent and transparent resin.
6. A dark reflective film with a slit positioning cursor according to claim 5, characterized in that: The bead layer (1) includes polyacrylate resin and glass microspheres. The glass microspheres are adhered to the polyacrylate resin and have a refractive index of 2.21 and a particle size of 38-63 micrometers.
7. A dark reflective film with a slit positioning cursor according to claim 6, characterized in that: The adhesive backing layer (3) is a polyacrylate pressure-sensitive adhesive, the release layer (4) is a release paper, the adhesive backing layer (3) is coated on the release layer (4), and after the adhesive backing layer (3) dries, it is bonded together with the reflective layer (2).
8. A dark reflective film with a slit positioning cursor according to claim 7, characterized in that: The carrier film layer (10) is a PET film or a TPU film, and the thickness of the carrier film layer (10) is 50-75 micrometers.