Laser engraving label production method and laser engraving label

Abstract

This invention discloses a method for manufacturing laser-engraved labels and a laser-engraved label. The method includes: an engraving coating preparation process, a contrast coating preparation process, and a label preparation process. The label preparation process includes: preparing a release substrate, applying the engraving coating to the release substrate, and baking to form a laser-engraved film attached to the release substrate; preparing a label substrate, applying the contrast coating to the label substrate, and baking to form a contrast coating film attached to the label substrate; laminating the laser-engraved film to the underside of the contrast coating film, and setting release paper on the upper surface of the label substrate through an adhesive layer to obtain a laser-engraved label. This label has good weather resistance, wear resistance, and corrosion resistance, and can maintain stable anti-counterfeiting performance in various harsh environments. This makes the laser label less prone to damage or failure during long-term use, providing durable and reliable anti-counterfeiting protection for goods.

Description

Technical Field

[0001] This invention relates to the field of label manufacturing, and in particular to a method for producing laser-engraved labels and a laser-engraved label. Background Technology

[0002] With the continuous development of information technology, object labeling is becoming increasingly important. For example, electronic devices, machines, and automobiles all require labels for identification. Currently, laser-engravable labels on the market primarily replace traditional metal labels. These labels utilize laser engraving technology, making them difficult to tamper with and the label material difficult to tear off. Compared to traditional metal labels, flexible labels offer advantages such as lower cost and better tamper-proof performance.

[0003] However, due to the high technical barriers, there are very few domestic companies that can produce laser engraving materials. Compared with imported laser labels, domestic laser labels are inferior in terms of weather resistance, wear resistance, and corrosion resistance. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a method for manufacturing laser-engraved labels, the resulting laser-engraved labels having good weather resistance, wear resistance, and corrosion resistance.

[0005] The present invention also proposes a laser-engraved label.

[0006] A laser-engraved label manufacturing method according to a first aspect of the present invention includes: an engraving coating preparation step, a contrast coating preparation step, and a label manufacturing step;

[0007] The carving coating preparation process is used to prepare carving coating, and the comparison coating process is used to prepare comparison coating. The carving coating contains polymethyl methacrylate and a first color paste, and the comparison coating contains polymethyl methacrylate and a second color paste. The first color paste and the second color paste have different colors. At least one of the carving coating and the comparison coating contains modified acrylic resin.

[0008] The label preparation process includes the following steps:

[0009] Prepare a release substrate, apply the engraving coating to the release substrate, form an engraving coating layer on the end face of the release substrate, and bake the engraving coating layer to form a laser engraved film attached to the release substrate.

[0010] Prepare a label substrate, apply the contrast coating to the label substrate, form a contrast coating layer on the lower end surface of the label substrate, and bake the contrast coating layer to form a contrast coating film attached to the label substrate;

[0011] The laser-engraved film is laminated to the underside of the contrast coating film, and release paper is applied to the upper surface of the label substrate through an adhesive layer to obtain a laser-engraved label.

[0012] The laser engraving label manufacturing method according to the present invention has at least the following beneficial effects: the laser engraving label has good weather resistance, wear resistance and corrosion resistance, and can maintain stable anti-counterfeiting performance in various harsh environments, making the laser label less prone to damage or failure during long-term use, and providing durable and reliable anti-counterfeiting protection for goods.

[0013] According to some embodiments of the present invention, the first color paste is a black color paste and the second color paste is a white color paste.

[0014] According to some embodiments of the present invention, the white slurry comprises TiO2.

[0015] According to some embodiments of the present invention, the black paste comprises carbon black.

[0016] According to some embodiments of the present invention, the engraving coating comprises modified acrylic resin and polymethyl methacrylate, and the engraving coating comprises the following components by weight: 30-90 parts modified acrylic resin, 5-30 parts polymethyl methacrylate, 5-10 parts polyester polyol resin, 5-10 parts epoxy resin, 10-40 parts first color paste, 0.1-2 parts ultraviolet absorber, 0.1-2 parts antioxidant, 1-10 parts laser engraving agent, 0.01-0.5 parts leveling agent, and 10-20 parts organic solvent.

[0017] According to some embodiments of the present invention, the comparative coating comprises polymethyl methacrylate, and the comparative coating comprises the following components by weight: 50-80 parts epoxy resin, 5-20 parts polymethyl methacrylate, 5-20 parts polyurethane resin, 1-10 parts dispersant, 0.01-0.5 parts leveling agent, and 20-40 parts second color paste.

[0018] According to some embodiments of the present invention, after the laser-engraved film is laminated with the contrast coating film, the release substrate is peeled off, and a transparent layer is formed on the outer surface of the laser-engraved film, the transparent layer comprising polymethyl methacrylate.

[0019] According to some embodiments of the invention, the transparent layer also contains pigments that absorb radiation in invisible areas.

[0020] According to some embodiments of the present invention, the release substrate is a PET release film.

[0021] According to some embodiments of the present invention, the label substrate is a fragile paper material or a polyester PET material.

[0022] According to some embodiments of the present invention, the adhesive layer is a pressure-sensitive adhesive layer.

[0023] According to a second aspect of the present invention, the laser-engraved label is manufactured by the laser-engraved label manufacturing method of any of the first aspects of the present invention described above.

[0024] The laser-engraved label according to the embodiments of the present invention has at least the following beneficial effects: the laser-engraved label has good weather resistance, wear resistance and corrosion resistance. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the structure of a laser-engraved label according to an embodiment of the present invention.

[0027] Figure label:

[0028] Label substrate 100, laser engraving film 200, contrast coating film 300, adhesive layer 400, release paper 500, transparent layer 600. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0031] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0032] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0033] The laser engraving label manufacturing method according to an embodiment of the present invention includes: an engraving coating preparation process, a contrast coating preparation process, and a label manufacturing process;

[0034] The process of preparing the carving coating is used to prepare the carving coating, and the process of preparing the comparative coating is used to prepare the comparative coating. The carving coating contains polymethyl methacrylate and a first color paste, and the comparative coating contains polymethyl methacrylate and a second color paste. The first color paste and the second color paste have different colors. At least one of the carving coating and the comparative coating contains a modified acrylic resin.

[0035] The label manufacturing process includes the following steps:

[0036] Prepare a release substrate, apply the engraving coating to the release substrate, form an engraving coating layer on the end face of the release substrate, and bake the engraving coating layer to form a laser engraving film 200 attached to the release substrate.

[0037] Prepare label substrate 100, apply contrast coating to label substrate 100 to form contrast coating layer on the lower end surface of label substrate 100, and bake contrast coating layer to form contrast coating film 300 attached to label substrate 1000.

[0038] A laser-engraved film 200 is laminated to the underside of a contrast coating film 300, and a release paper 500 is applied to the upper surface of the label substrate 100 via an adhesive layer 400 to produce a laser-engraved label.

[0039] The resulting laser-engraved labels have good weather resistance, wear resistance, and corrosion resistance, and can maintain stable anti-counterfeiting performance in various harsh environments. This makes the laser labels less prone to damage or failure during long-term use, providing durable and reliable anti-counterfeiting protection for goods.

[0040] Specifically, both the laser engraving film 200 and the contrast coating film 300 contain polymethyl methacrylate material. Polymethyl methacrylate material has good optical properties, toughness, processability and weather resistance, which makes the laser engraved label have good weather resistance, wear resistance and corrosion resistance.

[0041] Furthermore, the laser-engraved film 200 and the contrast coating film 300 are equipped with first and second color pastes of different colors, which can achieve better display effect after laser engraving and achieve better anti-counterfeiting effect.

[0042] Furthermore, at least one of the engraving coating and the contrast coating contains modified acrylic resin. Modified acrylic resin has good physical and mechanical properties, heat resistance, impact resistance, and good weather resistance, which makes the overall physical properties of the laser-engraved label better, and more heat-resistant, wear-resistant, and durable.

[0043] In some embodiments of the present invention, the release substrate is a carrier for forming the laser-engraved film 200. After the laser-engraved film 200 is laminated with the contrast coating film 300, the release substrate can be peeled off, or the release substrate can be peeled off during use.

[0044] In some embodiments of the present invention, the coating thickness of the engraving coating layer is 3-9 μm, the baking temperature is 110-130℃, and the coating speed is 15-20 m / min, which can obtain a laser engraved film 200 with better physical properties.

[0045] In some embodiments of the present invention, the coating thickness of the comparative coating layer is 3-9 μm, the baking temperature is 100-110℃, and the coating speed is 15-20 m / min, which can obtain a comparative coating film 300 with better physical properties.

[0046] In some embodiments of the present invention, the laser-engraved film 200 and the contrast coating film 300 are hot-pressed together. After hot pressing, the release substrate is peeled off. At this time, the thickness of the label substrate 100, the contrast coating film 300 and the laser-engraved film 200 is 60-80μm, so that the laser-engraved label has a certain degree of flexibility.

[0047] In some embodiments of the present invention, the hot pressing speed is 1-10 m / min to achieve a better hot pressing composite effect.

[0048] In some embodiments of the present invention, the adhesive layer 400 is a thermal adhesive layer. A thermal adhesive layer is coated on the upper surface of the substrate 100 and a release paper 500 is attached to facilitate the storage and use of the laser-engraved label.

[0049] In some embodiments of the present invention, the thickness of the thermal adhesive layer is 10-30 μm to maintain the good flexibility of the laser-engraved label.

[0050] In some embodiments of the present invention, the first color paste is black paste and the second color paste is white paste, which provides a good contrast effect and makes the anti-counterfeiting effect of the laser-engraved label better.

[0051] It is conceivable that, in some embodiments of the present invention, the first color paste and the second color paste may also be other different colors, which will not be described in detail here.

[0052] In some embodiments of the present invention, the white paste includes TiO2, that is, the white paste is titanium dioxide pigment. Titanium dioxide is a stable inorganic compound, which is titanium white, has strong adhesion, is not prone to chemical changes, and has stable performance, so that the contrast coating film 300 has a better contrast effect and better durability.

[0053] In some embodiments of the present invention, the black paste includes carbon black, that is, the black paste is a carbon black color paste, which has a good color development effect, and the main component of carbon black is C (carbon), which has stable performance and good durability.

[0054] In some embodiments of the present invention, the engraving coating comprises modified acrylic resin and polymethyl methacrylate. The engraving coating comprises the following components by weight: 30-90 parts modified acrylic resin, 5-30 parts polymethyl methacrylate, 5-10 parts polyester polyol resin, 5-10 parts epoxy resin, 10-40 parts first color paste, 0.01-0.5 parts leveling agent, and 10-20 parts organic solvent. The laser engraving film 200 obtained can meet the requirements of laser engraving (etching) and has good physical and chemical properties, as well as good weather resistance and wear resistance.

[0055] In some embodiments of the present invention, the engraving coating further includes the following components by weight: 0.1-2 parts of ultraviolet absorber and 0.1-2 parts of antioxidant, which makes the laser engraving film 200 have good stability and strong anti-aging properties, and makes the laser engraving label have a long service life.

[0056] In some embodiments of the present invention, the engraving coating further includes the following components by weight: 1-10 parts of laser engraving agent. The laser engraving agent can improve the laser absorption rate of the laser engraving film 200, making it easier for the laser engraving film 200 to be laser engraved. The use of the laser engraving agent can improve the quality of the plastic surface after laser engraving, making the marking clearer and more delicate.

[0057] In some embodiments of the present invention, the modified acrylic resin is any one of GA1160, DA112, and DA1100.

[0058] In some embodiments of the present invention, the epoxy resin is any one of SM601, 7160, and TT708.

[0059] In some embodiments of the present invention, the first color paste (black paste) is any one of KJ66300 and SJ6111.

[0060] In some embodiments of the present invention, the laser engraving agent is any one of 702 or XL-LD.

[0061] In some embodiments of the present invention, the leveling agent is any one of LD9310, BYK316, etc.

[0062] In some embodiments of the present invention, the organic solvent is any one of ethyl acetate, xylene, and methyl ethyl ketone.

[0063] In some embodiments of the present invention, the release substrate is a PET release film.

[0064] In some embodiments of the present invention, the preparation process of the engraving coating is as follows: first, organic solvent, modified acrylic resin, polymethyl methacrylate, polyester polyol resin, epoxy resin and first color paste are put into a mixing tank and stirred evenly; then, leveling agent, ultraviolet absorber, antioxidant, laser engraving agent and leveling agent are added to the mixing tank and stirred continuously until evenly mixed to obtain an engraving coating that can be laser engraved.

[0065] In some embodiments of the present invention, the comparative coating comprises polymethyl methacrylate, and the comparative coating comprises the following components by weight: 50-80 parts epoxy resin, 5-20 parts polymethyl methacrylate, 5-20 parts polyurethane resin, 1-10 parts dispersant, 0.01-0.5 parts leveling agent, and 20-40 parts second color paste. The resulting comparative coating film 300 has better physical and chemical properties.

[0066] In some embodiments of the present invention, the epoxy resin is any one of SM601, 7160, and TT708.

[0067] In some embodiments of the present invention, the dispersant is either LD64190 or LD66204.

[0068] In some embodiments of the present invention, the leveling agent is any one of LD9310, BYK316, etc.

[0069] In some embodiments of the present invention, the second color paste (white paste) is any one of KJ6350 and JK6211.

[0070] In some embodiments of the present invention, the label substrate is a fragile paper material or a polyester PET material.

[0071] In some embodiments of the present invention, after the laser-engraved film is laminated with the contrast coating film, the release substrate is peeled off, and a transparent layer is formed on the outer surface of the laser-engraved film. The transparent layer includes polymethyl methacrylate to further improve the wear resistance and durability of the laser-engraved label.

[0072] In some embodiments of the present invention, the thickness of the transparent layer is 40-200 μm, so that the laser-engraved label has good wear resistance and can maintain a certain degree of flexibility.

[0073] In some embodiments of the invention, the transparent layer also contains pigments that absorb radiation in invisible areas to further enhance the visual effect of the laser-engraved label.

[0074] Specifically, pigments that absorb radiation in invisible areas mainly include infrared reflective pigments and ultraviolet fluorescent pigments. Whether they reduce the surface temperature of an object by reflecting infrared rays or enhance visual effects by emitting fluorescence, they have unique functionality and visual effects.

[0075] According to a second aspect of the present invention, the laser-engraved label is manufactured by the laser-engraved label manufacturing method of any of the first aspects of the present invention, and has good weather resistance, wear resistance and corrosion resistance.

[0076] like Figure 1 As shown, in some embodiments of the present invention, the laser-engraved label consists of, from top to bottom, release paper 500, adhesive layer 400, label substrate 100, contrast coating film 300, laser-engraved film 200, and transparent layer 600.

[0077] To better understand the above technical solution, the following will provide a detailed explanation of the technical solution in conjunction with specific implementation methods.

[0078] Example 1

[0079] The label manufacturing process includes the following steps:

[0080] Prepare a release substrate, apply the engraving coating to the release substrate, form an engraving coating layer on the end face of the release substrate, and bake the engraving coating layer to form a laser engraving film 200 attached to the release substrate.

[0081] Prepare label substrate 100, apply contrast coating to label substrate 100 to form contrast coating layer on the lower end surface of label substrate 100, and bake contrast coating layer to form contrast coating film 300 attached to label substrate 1000.

[0082] The laser-engraved film 200 is laminated to the underside of the contrast coating film 300 by hot pressing. The release substrate is then peeled off, and the thickness of the semi-finished product is 60μm. A thermal adhesive layer is coated on the upper surface of the substrate 100 and a release paper 500 is attached. The thickness of the thermal adhesive layer is 10μm, thus producing the laser-engraved label.

[0083] The engraving coating layer has a thickness of 3μm, a baking temperature of 110℃, and a coating speed of 15m / min.

[0084] The coating thickness was 3 μm, the baking temperature was 100℃, and the coating speed was 15 m / min.

[0085] The engraving coating comprises the following components by weight: 30 parts modified acrylic resin, 5 parts polymethyl methacrylate, 5 parts polyester polyol resin, 5 parts epoxy resin, 10 parts black paste, 0.1 parts ultraviolet absorber, 0.1 parts antioxidant, 1 part laser engraving agent, 0.01 parts leveling agent, and 10 parts organic solvent.

[0086] The comparative coating comprises the following components by weight: 50 parts epoxy resin, 5 parts polymethyl methacrylate, 5 parts polyurethane resin, 1 part dispersant, 0.01 parts leveling agent, and 20 parts white paste.

[0087] The laser-engraved labels produced by the above process have good flexibility, good weather resistance, wear resistance and corrosion resistance, and high laser engraving clarity.

[0088] Example 2

[0089] The label manufacturing process includes the following steps:

[0090] Prepare a release substrate, apply the engraving coating to the release substrate, form an engraving coating layer on the end face of the release substrate, and bake the engraving coating layer to form a laser engraving film 200 attached to the release substrate.

[0091] Prepare label substrate 100, apply contrast coating to label substrate 100 to form contrast coating layer on the lower end surface of label substrate 100, and bake contrast coating layer to form contrast coating film 300 attached to label substrate 1000.

[0092] The laser-engraved film 200 is laminated to the underside of the contrast coating film 300 by hot pressing. The release substrate is then peeled off, and the thickness of the semi-finished product is 80μm. A thermal adhesive layer is coated on the upper surface of the substrate 100 and a release paper 500 is attached. The thickness of the thermal adhesive layer is 30μm, thus producing the laser-engraved label.

[0093] The engraving coating layer has a thickness of 9μm, a baking temperature of 130℃, and a coating speed of 20m / min.

[0094] The coating thickness was 9 μm, the baking temperature was 110℃, and the coating speed was 20 m / min.

[0095] The engraving coating comprises the following components by weight: 90 parts modified acrylic resin, 30 parts polymethyl methacrylate, 10 parts polyester polyol resin, 10 parts epoxy resin, 40 parts black paste, 2 parts ultraviolet absorber, 2 parts antioxidant, 10 parts laser engraving agent, 0.5 parts leveling agent, and 20 parts organic solvent.

[0096] The comparative coating comprises the following components by weight: 80 parts epoxy resin, 20 parts polymethyl methacrylate, 20 parts polyurethane resin, 10 parts dispersant, 0.5 parts leveling agent, and 40 parts white paste.

[0097] The laser-engraved labels produced by the above process have good flexibility, good weather resistance, wear resistance and corrosion resistance, and high laser engraving clarity.

[0098] Example 3

[0099] The label manufacturing process includes the following steps:

[0100] Prepare a release substrate, apply the engraving coating to the release substrate, form an engraving coating layer on the end face of the release substrate, and bake the engraving coating layer to form a laser engraving film 200 attached to the release substrate.

[0101] Prepare label substrate 100, apply contrast coating to label substrate 100 to form contrast coating layer on the lower end surface of label substrate 100, and bake contrast coating layer to form contrast coating film 300 attached to label substrate 1000.

[0102] The laser-engraved film 200 is laminated to the underside of the contrast coating film 300 by hot pressing. The release substrate is then peeled off, and the thickness of the semi-finished product is 70μm. A thermal adhesive layer is coated on the upper surface of the substrate 100 and a release paper 500 is attached. The thickness of the thermal adhesive layer is 20μm, thus producing the laser-engraved label.

[0103] The engraving coating layer has a thickness of 6μm, a baking temperature of 120℃, and a coating speed of 18m / min.

[0104] The coating thickness was 6 μm, the baking temperature was 105℃, and the coating speed was 18 m / min.

[0105] The engraving coating comprises the following components by weight: 60 parts modified acrylic resin, 20 parts polymethyl methacrylate, 8 parts polyester polyol resin, 7 parts epoxy resin, 25 parts black paste, 1 part ultraviolet absorber, 1 part antioxidant, 6 parts laser engraving agent, 0.2 parts leveling agent, and 15 parts organic solvent.

[0106] The comparative coating comprises the following components by weight: 65 parts epoxy resin, 12 parts polymethyl methacrylate, 13 parts polyurethane resin, 6 parts dispersant, 0.2 parts leveling agent, and 30 parts white paste.

[0107] The laser-engraved labels produced by the above process have good flexibility, good weather resistance, wear resistance and corrosion resistance, and high laser engraving clarity.

[0108] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A method for manufacturing laser-engraved labels, characterized in that, include: The process of preparing engraving coatings, the process of preparing contrast coatings, and the process of preparing labels; The carving coating preparation process is used to prepare the carving coating, and the comparison coating process is used to prepare the comparison coating. The carving coating contains polymethyl methacrylate and a first color paste, and the comparison coating contains polymethyl methacrylate and a second color paste. The first color paste and the second color paste have different colors. The carving coating contains modified acrylic resin and polymethyl methacrylate. The carving coating comprises the following components by weight: 30-90 parts modified acrylic resin, 5-30 parts polymethyl methacrylate, 5-10 parts polyester polyol resin, 5-10 parts epoxy resin, 10-40 parts first color paste, 0.01-0.5 parts leveling agent, and 10-20 parts organic solvent. The label preparation process includes the following steps: Prepare a release substrate, apply the engraving coating to the release substrate, form an engraving coating layer on the end face of the release substrate, and bake the engraving coating layer to form a laser engraved film attached to the release substrate. Prepare a label substrate, apply the contrast coating to the label substrate, form a contrast coating layer on the lower end surface of the label substrate, and bake the contrast coating layer to form a contrast coating film attached to the label substrate; The laser-engraved film is laminated to the underside of the contrast coating film, and release paper is applied to the upper surface of the label substrate through an adhesive layer to obtain a laser-engraved label.

2. The laser engraving label manufacturing method according to claim 1, characterized in that, The first color paste is black, and the second color paste is white.

3. The laser engraving label manufacturing method according to claim 1, characterized in that, The comparative coating comprises polymethyl methacrylate, and the comparative coating comprises the following components by weight: 50-80 parts epoxy resin, 5-20 parts polymethyl methacrylate, 5-20 parts polyurethane resin, 0.01-0.5 parts leveling agent, and 20-40 parts second color paste.

4. The laser engraving label manufacturing method according to claim 1, characterized in that, After the laser-engraved film is laminated with the contrast coating film, the release substrate is peeled off, and a transparent layer is formed on the outer surface of the laser-engraved film. The transparent layer includes polymethyl methacrylate.

5. The laser engraving label manufacturing method according to claim 4, characterized in that, The transparent layer also contains pigments that absorb radiation in invisible areas.

6. The laser engraving label manufacturing method according to claim 1, characterized in that, The release substrate is a PET release film.

7. The laser engraving label manufacturing method according to claim 1, characterized in that, The label substrate is made of fragile paper or polyester PET.

8. The laser engraving label manufacturing method according to claim 1, characterized in that, The adhesive layer is a pressure-sensitive adhesive layer.

9. A laser-engraved label, characterized in that, include: The laser-engraved label is manufactured using the laser-engraved label manufacturing method according to any one of claims 1-8.

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