Laser label film

Abstract

The utility model provides a kind of laser label film, it includes laser absorption layer, fluorescent material layer and adhesive layer which are sequentially laminated;Wherein, the laser absorption layer and the fluorescent material layer have the color difference of visual identification, and laser absorption layer is set to the part after absorbing laser in this layer and the fluorescent material layer peels off;And, the fluorescent material layer includes resin material, and, fluorescent material layer includes fluorescent region, the fluorescent region further contains fluorescent substance, the fluorescent substance is selected from one or more in material which has the fluorescence characteristic after being irradiated via infrared waveband light, visible light waveband light or ultraviolet waveband light;The thickness of the fluorescent material layer is 20~120 μm;The thickness of the laser absorption layer is 2~20 μm.The laser label film can effectively prevent laser etching flexible label from being counterfeited by specific fluorescent material layer, to meet the demand of anti-counterfeiting.

Description

Technical Field

[0001] This utility model belongs to the field of label technology and relates to a laser label film. Background Technology

[0002] Labels are marking tools used to identify product targets, categories, or contents. Based on their form, they can be divided into physical labels, online labels, and electronic labels. Physical labels, as brief signs indicating information such as the product name, weight, volume, and purpose, can be further subdivided by their application method into general labels and self-adhesive labels, the latter being the most common type.

[0003] Flexible labels (also known as "laser labels" or "tamper-evident product labels") are special paper signs made using laser etching technology, offering the advantages of replacing traditional metal signs. Thanks to the indelible nature of laser etching, these labels effectively prevent information tampering and are widely used in industries such as automotive manufacturing, instrumentation, and electronics.

[0004] Reference 1 discloses a flexible label for vehicle nameplates, comprising a weather-resistant coating, a weather-resistant polyester film, an adhesive, and a glassine release liner. The weather-resistant coating is applied to the surface of the weather-resistant polyester film and then dried. The adhesive is transferred to the glassine release liner using a coating machine. The weather-resistant polyester film is bonded to the adhesive to form the flexible label. This flexible label for vehicle nameplates can replace the previously used metal nameplates. The flexible paper label is laser-etched, making it difficult to tamper with. Compared to traditional aluminum nameplate marking, laser label etching offers advantages such as tamper-proofing, cost savings, flexible marking, and no need for inventory.

[0005] However, it should be noted that while existing flexible labels achieve tamper-proof functionality through laser etching, they do not yet possess anti-counterfeiting features. Due to the lack of a unique identification structure, these labels are easily counterfeited and fail to meet the market's actual needs for product anti-counterfeiting.

[0006] References:

[0007] Reference 1: CN118667461A Utility Model Content

[0008] Problems to be solved by utility models

[0009] "Laser labels" are a special type of sign that uses laser etching technology. The surface pattern is formed by laser etching of the surface layer (laser absorption layer). Because the exposed part of the surface layer after etching is a different color from the surface layer, the pattern formed on the surface layer can be observed better.

[0010] Furthermore, for anti-counterfeiting purposes, the current method involves adding fluorescent material to the adhesive layer of the label. When the label is used and affixed to a (metal) component, the fluorescent material can penetrate into the substrate to varying degrees, leaving an imprint on the substrate. Furthermore, if the label is illegally peeled off, it is also possible to detect from the substrate whether a laser label has been affixed there.

[0011] Despite the aforementioned shortcomings, it still has limitations in terms of anti-counterfeiting features, and the anti-counterfeiting effect based on the adhesive layer remains limited.

[0012] The technical problem this invention aims to solve is to provide a novel laser label film. This laser label film, through a specific identifiable structure, can effectively prevent the counterfeiting of laser-etched flexible labels, thereby meeting anti-counterfeiting requirements. This invention adds fluorescent material (i.e., the "fluorescent material layer" of this invention) to the color material layer previously used to provide contrasting colors. This not only provides color difference to form visual patterns in the etched and exposed portion of the laser absorption layer, but also further provides multiple fluorescent optical properties in the exposed area, thus offering more and more convenient anti-counterfeiting methods.

[0013] Solution for solving the problem

[0014] Through long-term research, the inventors discovered that the above-mentioned technical problems can be solved by implementing the following technical solution:

[0015] [1]. A laser label film comprising a laser absorption layer, a fluorescent material layer and an adhesive layer stacked sequentially;

[0016] The laser absorption layer and the fluorescent material layer have a visually identifiable color difference, and the laser absorption layer is configured such that the portion of the laser absorbed in the layer is peeled off from the fluorescent material layer.

[0017] Furthermore, the fluorescent material layer includes a resin material, and the fluorescent material layer includes a fluorescent region, the fluorescent region further comprising a fluorescent substance, the fluorescent substance being selected from one or more materials that exhibit fluorescent properties after being irradiated by infrared light, visible light, or ultraviolet light;

[0018] The thickness of the fluorescent material layer is 20–120 μm;

[0019] The thickness of the laser absorption layer is 2–20 μm.

[0020] [2]. According to the laser label film described in [1], wherein,

[0021] The thickness of the fluorescent material layer is 30–100 μm.

[0022] [3]. The laser label film according to [1] or [2], wherein,

[0023] The fluorescent material layer includes one or more regions with different fluorescence properties.

[0024] [4]. The laser label film according to any one of [1]-[3], wherein,

[0025] The fluorescence properties include one or both of the fluorescence wavelength and the fluorescence intensity.

[0026] [5]. The laser label film according to any one of [1]-[4], wherein,

[0027] The surface area of ​​the fluorescent material layer facing the laser absorption layer accounts for 1% to 99% of the total surface area.

[0028] [6]. The laser label film according to any one of [1]-[5], wherein,

[0029] The total content of fluorescent substances in the fluorescent material layer is 0.1% to 20%.

[0030] [7]. The laser label film according to any one of [1]-[6], wherein,

[0031] The fluorescent material in the fluorescent material layer includes organic phosphors and / or inorganic phosphors; the organic phosphors include naphthol triazole-based or benzoxazole-based phosphors, or the organic phosphors are one or more of diaminostilbene, sodium fluorescein, thiosulfate T, succinate red, rhodamine B, acridine orange, diphenylmethane-based, triphenylmethane-based, xanthene-based, thiazide-based, or thiazolium-based phosphors; the inorganic phosphors include inorganic metal chlorine-based, silicate-based, halide-based, or sulfide-based phosphors, or the inorganic phosphors are green-emitting inorganic phosphors, red-emitting inorganic phosphors, or blue-emitting inorganic phosphors.

[0032] [8]. The laser label film according to any one of [1]-[7], wherein,

[0033] The laser absorption layer is set as the surface layer of the label film.

[0034] [9]. The laser label film according to [1]-[8], wherein,

[0035] The thickness of the adhesive layer is 10–80 μm.

[0036]

[10] . The laser label film according to any one of [1]-[9], wherein,

[0037] The adhesive layer also has a release substrate layer on the side away from the fluorescent material layer.

[0038] Effects of the utility model

[0039] The laser label film provided by this utility model has excellent anti-counterfeiting performance. When verifying the authenticity of the label on the surface to be attached, the authenticity can be identified by the invisible mark printed on the fluorescent material layer, which fluoresces under specific light. Furthermore, due to the fluorescent area in the fluorescent material layer, when an uninformed person counterfeits the label, they will only notice that the laser absorption layer allows light to pass through the etched recesses, while the invisible mark printed on the fluorescent material layer will remain unnoticed. Thus, multiple anti-counterfeiting measures can be used to meet the requirements for anti-counterfeiting. Attached Figure Description

[0040] Figure 1 A schematic diagram of the structure of a laser label film according to an embodiment of the present invention is shown.

[0041] Explanation of reference numerals in the attached figures:

[0042] Figure 1 In the diagram, 1 is the laser absorption layer; 2 is the fluorescent material layer; 2-1 is the fluorescent region; 3 is the adhesive layer; and 4 is the release substrate layer. Detailed Implementation

[0043] The specific embodiments of this utility model are further described below with reference to the accompanying drawings and technical solutions. The description of the technical features described below is based on representative embodiments and specific examples of this utility model, but this utility model is not limited to these embodiments and specific examples. It should be noted that:

[0044] In this specification, the range of values ​​referred to as "value A to value B" refers to the range including the endpoint values ​​A and B.

[0045] In this specification, the numerical range indicated by "above" or "below" refers to the numerical range that includes the stated number.

[0046] In this specification, the word "may" has two meanings: to perform a certain process and not to perform a certain process.

[0047] In this specification, the terms "optional" or "optional" are used to indicate the use or omission of certain substances, components, procedures, application conditions, etc.

[0048] In this specification, references to "some specific / preferred embodiments," "other specific / preferred embodiments," "implementation," etc., refer to specific elements (e.g., features, structures, properties, and / or characteristics) related to that embodiment, which are included in at least one of the embodiments described herein and may or may not be present in other embodiments. Furthermore, it should be understood that these elements may be combined in any suitable manner in various embodiments.

[0049] It should be understood that the accompanying drawings are not drawn to scale, but are merely appropriately simplified depictions to illustrate the various features of the basic principles of this invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and environment in which they will be used.

[0050] See Figure 1 This illustrates the multilayer structure of a laser label film in a specific embodiment of the present invention. Specifically, the laser label film comprises, from top to bottom, a laser absorption layer, a fluorescent material layer, an adhesive layer, and a release substrate layer, stacked sequentially.

[0051] (Laser absorption layer)

[0052] In this invention, the laser absorption layer is set as the surface layer of the label film, possessing laser shielding properties, and patterns can be formed by laser etching. This layer can be obtained commercially or by self-production based on existing technology.

[0053] In this invention, there are no particular restrictions on the type and thickness of the laser absorption layer; it can be set with reference to the type and thickness of the surface layer of conventional label films in the art.

[0054] In some specific embodiments, the laser absorption layer contains a resin and a colorant, and the colorant in the laser absorption layer does not have fluorescent properties.

[0055] In some specific embodiments, the resin in the laser absorption layer may be selected from at least one of acrylic resin, alkyd resin, fluororesin, polyolefin resin, polyester resin, polyurethane resin, and polycarbonate. Considering weather resistance and processability, at least one of acrylic resin, polyolefin resin, and polyester resin is preferred. Considering suitability during coloring or dispersibility of coloring agents, acrylic resin is preferred.

[0056] For acrylic resins, they can be polymers with one or more (meth)acrylic acids and their derivatives as monomers, and can be homopolymers or copolymers.

[0057] In some specific embodiments, the colorant in the laser absorption layer can be a pigment or dye. As a pigment or dye that does not possess fluorescent properties, it can be as follows:

[0058] Yellow: Coloring agents of isoindoline, isoindoline, quinoline, anthraquinone, pyrazolone, flavanone, benzimidazolone, nickel azo, etc.

[0059] Red: Coloring agents of anthraquinone, dinaphthalene, quinacrine, indigo, etc.

[0060] Blue: Coloring agents such as phthalocyanine, styrax, anthraquinone, and cobalt.

[0061] Green: Colorants such as phthalocyanine, emerald green, chromium oxide, and cadmium.

[0062] Brown: Iron oxide series coloring agent, or a combination of isoindole ketone series yellow coloring agent, naphthalene-benzene series red coloring agent and phthalocyanine series blue coloring agent;

[0063] Orange: Single color can be anthraquinone, pyrazolone, violet ketone, naphthalene-benzene, quinacrine, or isoindoleone yellow colorant and naphthalene-benzene red colorant can be used together;

[0064] White: Colorants based on phthaloyl, zinc, lead, etc.

[0065] Black: Colorants such as carbon black, aniline black, dinaphthalene-impregnated benzene black, and titanium black.

[0066] In some specific implementations, at least one of the following can be added to the laser absorption layer: hardener, antioxidant, leveling agent, UV inhibitor, dispersant, stabilizer, and catalyst. Considering secondary oxidation, it is best to add any two or more additives, and different additives can be selected according to the material of the resin to prevent oxidation and yellowing.

[0067] Furthermore, without affecting the technical effect of this invention, in order to give the laser absorption layer a certain metallic luster, metal oxides or metal components can be added to the laser absorption layer. For example, these can be metal oxides such as titanium oxide, zinc oxide, iron oxide, and aluminum oxide, or metals such as aluminum, zinc, and copper, or their alloys, can be added directly. The proportions of these metal oxides or metal components can be adjusted according to optical requirements to achieve the desired metallic luster effect.

[0068] In some specific implementations, when the laser absorption layer is too thick, the etching efficiency of the laser beam will be significantly reduced, making it difficult to completely etch through with a single laser irradiation, potentially resulting in defects such as blurred printing or broken lines. To achieve complete etching, the laser power needs to be increased, which may negatively impact the underlying structure (e.g., the fluorescent material layer described later). Therefore, from the perspective of laser processing suitability, the thickness of the laser absorption layer is preferably less than 20 μm, and more preferably less than 15 μm.

[0069] On the other hand, when the thickness of the laser absorption layer is insufficient, the following technical defects may occur: insufficient coverage of the underlying layer (such as the fluorescent material layer), resulting in a transparent appearance in non-etched areas; and reduced color contrast formed by laser etching, affecting the clarity of the markings. Therefore, from the perspective of ensuring good visual presentation, the thickness of the laser absorption layer is preferably 2 μm or more, and more preferably 5 μm or more.

[0070] In some specific implementation schemes, considering both the reliability of the above-mentioned process and the visual effect, the thickness of the laser absorption layer can be 2 to 20 μm, preferably 5 to 15 μm, for example, it can be 2 μm, 3 μm, 5 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, etc.

[0071] (Fluorescent material layer)

[0072] In this invention, the fluorescent material layer itself can be obtained from the prior art. It is usually set as the information display layer of the label film in actual use. After the laser absorption layer at the corresponding position is removed by laser etching, the fluorescent material layer is exposed. Under specific light irradiation, a visual information mark is formed. The information mark includes, but is not limited to, graphic information such as Chinese characters, numbers, symbols, barcodes or QR codes.

[0073] In some specific implementations, the fluorescent material layer comprises conventional resin materials and fluorescent substances found in the prior art.

[0074] In some specific embodiments, the resin material in the fluorescent material layer can be selected from at least one of acrylic resin, alkyd resin, fluororesin, polyolefin resin, polyester resin, polyurethane resin, and polycarbonate. Considering weather resistance and processability, at least one of acrylic resin, polyolefin resin, and polyester resin is preferred. However, considering the anti-counterfeiting performance of the fluorescent material layer, acrylic resin is preferred.

[0075] In some specific embodiments, the fluorescent material is selected from one or more materials that exhibit fluorescent properties after being irradiated by infrared light (>700nm), visible light (400-700nm), or ultraviolet light (<400nm).

[0076] In some specific implementations, the fluorescent material layer includes one or more regions with different fluorescent properties.

[0077] In some specific implementations, the fluorescence characteristic includes one or both of the fluorescence wavelength and the fluorescence intensity.

[0078] In some specific embodiments, the fluorescent material in the fluorescent material layer is an organic phosphor and / or an inorganic phosphor; the organic phosphor includes naphthol triazole or benzoxazole, or the organic phosphor is one or more of diaminostilbene, sodium fluorescein, thiosulfate T, succinate red, rhodamine B, acridine orange, diphenylmethane, triphenylmethane, xanthene, thiazide, or thiazole; the inorganic phosphor includes inorganic metal chlorine, silicate, halide, or sulfide, or the inorganic phosphor is a green-emitting inorganic phosphor, a red-emitting inorganic phosphor, or a blue-emitting inorganic phosphor.

[0079] Green luminescent inorganic phosphors: Zn₂GeO₄:Mn, ZnO:Zn, ZnS:Cu, ZnS:(Cu,Al), (Zn,Cd)S:(Cu,Al), ZnS:(Cu,Au,Al), Zn₂SiO₄:Mn, ZnS:(Cu,Ag), (Zn,Cd)S:Cu, Gd₂O₂S:Tb, La₂O₂S:Tb, Y₂SiO₅:(Ce,Tb), CeMgAl 11 O 19 :Tb、ZnS:(Cu,Co)、LaOBr:(Tb,Tm)、La2O2S:Tb、BaMg2Al 16 O 27 (Eu, Mu) etc.

[0080] Red luminescent inorganic phosphors include: Y₂O₃:Eu, Y(P,V)O₄:Eu, S:Eu, 0.5MgF₂·3.5MgO·GeO₂:Mn, YVO₄:Eu, (Y,Gd)BO₃:Eu, etc.

[0081] Blue luminescent inorganic phosphors: Sr5(PO4)3Cl:Eu, BaMg2Al 16 O 27 Eu, BaMgAl 10 O 17 :Eu, ZnS:Ag, CaWO4, Y2SiO5:Ce, ZnS: (Ag, Ga, Cl), Sr2P2O7:Eu, CaS:Bi, CaSrS:Bi, etc.

[0082] It should be noted that the laser absorption layer and the fluorescent material layer have a visually identifiable color difference to ensure that the two can be clearly distinguished.

[0083] In some specific implementations, at least one of the following can be added to the fluorescent material layer: a hardener, an antioxidant, a leveling agent, a UV protectant, a dispersant, a stabilizer, and a catalyst.

[0084] In this invention, the thickness of the fluorescent material layer can be 20–120 μm, preferably 30–100 μm, and more preferably 40–80 μm. For example, it can be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, etc. This thickness setting provides good fluorescence properties and mechanical strength. Furthermore, it blocks the laser during laser etching of the laser absorption layer, preventing the laser from passing through and causing unnecessary damage. In particular, the fluorescent material can also assist in blocking the laser.

[0085] In some specific embodiments, the surface area of ​​the fluorescent region, measured from the surface of the fluorescent material layer facing the laser absorption layer, is 1% to 99%, preferably 5% to 90%.

[0086] In some specific embodiments, the total content of fluorescent material in the fluorescent material layer is 0.1% to 20%, preferably 1% to 10%, for example, it can be 0.5%, 1%, 3%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, etc.

[0087] (Adhesive layer)

[0088] In this invention, there are no particular limitations on the material of the adhesive layer; pressure-sensitive adhesives or hot melt adhesives with re-peel properties commonly used in the art can be used. For pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, polysiloxane pressure-sensitive adhesives, polyester pressure-sensitive adhesives, polyurethane pressure-sensitive adhesives, polyamide pressure-sensitive adhesives, etc., are typically selected. For usable hot melt adhesives, various thermoplastic resins can be selected, such as PA hot melt adhesives, TPU hot melt adhesives, EVA hot melt adhesives, PES hot melt adhesives, etc.

[0089] In some specific embodiments, the thickness of the adhesive layer is 10–80 μm, preferably 30–50 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, etc. When the thickness of the adhesive layer is less than 10 μm, it may result in insufficient adhesion, making it difficult to achieve the desired adhesion effect; while when the thickness of the adhesive layer is greater than 80 μm, it may cause a decrease in the cohesive force of the adhesive layer, affecting the overall performance. By controlling the thickness of the adhesive layer within the above range, sufficient adhesion can be provided while ensuring that the laser label film can be firmly adhered to the surface of the substrate.

[0090] (Peeling off the substrate layer)

[0091] In this invention, when the laser label film is not in use, the adhesive layer also has a release substrate layer on the side away from the fluorescent material layer.

[0092] In some specific implementations, when the laser label film is not in use, the release substrate layer serves to support and protect the adhesive layer from contamination and damage, maintaining its adhesion and extending the product's lifespan. Furthermore, there are no particular limitations on the material of the release substrate layer; for example, it can be selected from resin films such as polyolefins, polyesters, polyacrylates, or polycarbonates, composite films of resin films and fiber layers (such as non-woven fabrics), or paper films, etc.

[0093] In some specific implementations, the thickness of the release substrate layer can be 80μm to 180μm, preferably 100μm to 150μm, for example, it can be 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, etc.

[0094] (Other functional layers)

[0095] To achieve more functions, those skilled in the art can further add other functional layers between, inside or outside the laser absorption layer, fluorescent material layer and adhesive layer of the laser label film as needed. For example, these may include, but are not limited to, watermark layers, printing layers, corona layers, etc.

[0096] Example

[0097] Example 1:

[0098] The laser tag film of this embodiment can be prepared by the following method:

[0099] The raw materials involved in this embodiment are sourced as follows: black pigment (JQ1980) and white pigment (JQ1001) are manufactured by Hangzhou Zhongfucai New Material Co., Ltd.; acrylic resin (KP-1876), acrylic resin (PE-121) and additives (cellulose acetate butyrate, CAB) are manufactured by Enshiai (Hangzhou) Film Co., Ltd.; melamine resin (MS-11) is provided by Sanwa Kemikal of Japan; and isocyanate (COLONATE HK) and fluorescent agent (kalightB) are provided by Meisei Shokai of Japan.

[0100] 1) Preparation of laser absorption layer

[0101] Mix and stir according to the following ratio to obtain mixed resin 1.

[0102] 100 10 2 5 10

[0103] A doctor blade coater is used to coat the surface of substrates such as PET with a thickness of 10 μm. The coating speed is 10 m / min, the oven temperature is 150℃, and the drying time is 5 min. After drying, the coating is rolled up to form the absorbent layer.

[0104] 2) Preparation of fluorescent material layer

[0105] Mix and stir according to the following ratio to obtain mixed resin 2.

[0106] 100 20 5 5 10

[0107] A doctor blade coater is used to coat the absorber layer to a thickness of 50 μm. The coating speed is 8 m / min, the oven temperature is 150℃, and the drying time is 5 min. After drying, the material is rolled up to form the fluorescent material layer.

[0108] 3) Adhesive coating

[0109] Mix and stir according to the following ratio to obtain mixed resin 3.

[0110] 100 5 10

[0111] Using a doctor blade coating machine, an adhesive is applied to the surface of the release paper to a thickness of 30 μm. The coating speed is 15 m / min, the oven temperature is 90℃, and the drying time is 2 min. After drying, it is bonded to the fluorescent material layer to form the product.

[0112] Comparative Example 1:

[0113] The preparation method is the same as in Example 1, except that the thickness of the laser absorption layer is 25 μm.

[0114] Comparative Example 2:

[0115] The preparation method is the same as in Example 1, except that the thickness of the laser absorption layer is 1 μm.

[0116] Comparative Example 3:

[0117] The preparation method is the same as in Example 1, except that there is no fluorescent agent in the mixed resin 2.

[0118] Result comparison:

[0119] Example 1 5 5 5 Comparative Example 1 5 2 2 Comparative Example 2 2 4 4 Comparative Example 3 5 5 1

[0120] "5" indicates a good evaluation result for resistance to alteration, while "1" indicates a poor evaluation result for resistance to alteration. The lower the score, the greater the deviation.

[0121] Industrial availability

[0122] The laser label film provided by this invention can be prepared and used industrially.

Claims

1. A laser label film, characterized in that, It includes a laser absorption layer, a fluorescent material layer, and an adhesive layer stacked sequentially; The laser absorption layer and the fluorescent material layer have a visually identifiable color difference, and the laser absorption layer is configured such that the portion of the laser absorbed in the layer is peeled off from the fluorescent material layer. Furthermore, the fluorescent material layer includes a resin material, and the fluorescent material layer includes a fluorescent region, the fluorescent region further comprising a fluorescent substance, the fluorescent substance being selected from one or more materials that exhibit fluorescent properties after being irradiated by infrared light, visible light, or ultraviolet light; The thickness of the fluorescent material layer is 20–120 μm; The thickness of the laser absorption layer is 2–20 μm.

2. The laser label film according to claim 1, characterized in that, The thickness of the fluorescent material layer is 30–100 μm.

3. The laser label film according to claim 1 or 2, characterized in that, The fluorescent material layer includes one or more regions with different fluorescence properties.

4. The laser label film according to claim 1 or 2, characterized in that, The fluorescence properties include one or both of the fluorescence wavelength and the fluorescence intensity.

5. The laser label film according to claim 1 or 2, characterized in that, The surface area of ​​the fluorescent material layer facing the laser absorption layer accounts for 1% to 99% of the total surface area.

6. The laser label film according to claim 1 or 2, characterized in that, The total content of fluorescent substances in the fluorescent material layer is 0.1% to 20%.

7. The laser label film according to claim 1 or 2, characterized in that, The fluorescent material in the fluorescent material layer includes organic phosphors and / or inorganic phosphors; the organic phosphors include naphthol triazole-based or benzoxazole-based phosphors, or the organic phosphors are one or more of diaminostilbene, sodium fluorescein, thiosulfate T, succinate red, rhodamine B, acridine orange, diphenylmethane-based, triphenylmethane-based, xanthene-based, thiazide-based, or thiazolium-based phosphors; the inorganic phosphors include inorganic metal chlorine-based, silicate-based, halide-based, or sulfide-based phosphors, or the inorganic phosphors are green-emitting inorganic phosphors, red-emitting inorganic phosphors, or blue-emitting inorganic phosphors.

8. The laser label film according to claim 1 or 2, characterized in that, The laser absorption layer is set as the surface layer of the label film.

9. The laser label film according to claim 1 or 2, characterized in that, The thickness of the adhesive layer is 10–80 μm.

10. The laser label film according to claim 1 or 2, characterized in that, The adhesive layer also has a release substrate layer on the side away from the fluorescent material layer.

Images