Wear-resistant scratch-resistant magnetic temperature change film

Abstract

The utility model discloses a wear-resistant scratch-resistant magnetic temperature change film, and relates to the technical field of temperature change films. The wear-resistant and scratch-resistant magnetic temperature change film sequentially comprises a scratch-resistant layer, a temperature change layer, a PET layer, a composite adhesive layer, a flexible base material layer, a magnetic layer, an adhesive layer and a release layer. Through collaborative design of a multi-layer structure, the key problems that an existing temperature change film is insufficient in wear resistance, single in function, limited in application scene and the like are effectively solved. Specifically, by introducing an anti-scraping layer and a magnetic layer and using a flexible base material, multifunctional integration of wear-resistant protection, magnetic adsorption, flexible attachment and high-strength bonding is achieved, the durability and interaction experience of the temperature change film are improved, the application bottleneck of the temperature change film in complex environments (such as outdoors, curved surfaces and metal surfaces) is broken through, and the temperature change film has a wide application prospect. The anti-counterfeiting property, the decorative property and the functionality are realized, and an innovative path is provided for the technical upgrading of the intelligent identification material.

Description

Technical Field

[0001] This utility model relates to the field of thermochromic film technology, and in particular to a wear-resistant and scratch-resistant magnetic thermochromic film. Background Technology

[0002] With the rapid development of 5G and information technology, product labeling technology is facing diversified and intelligent innovation demands. In the era of information explosion, visual sensory experience has become one of the core elements that consumers focus on. Product labeling not only needs to fulfill the basic function of information transmission, but also needs to meet users' higher requirements for interactivity, aesthetics, and functionality. For example, the widespread use of voice-controlled devices, color-changing mugs, and nightlights all rely on innovative labeling technologies to achieve sensory interaction. However, traditional labeling methods such as direct writing and laser marking are limited by background color interference and functional limitations, making it difficult to simultaneously achieve high readability, anti-counterfeiting, and user experience. New labeling materials are urgently needed to overcome these technological bottlenecks.

[0003] Against this backdrop, thermochromic films, as an emerging intelligent labeling material, dynamically display colors and patterns by sensing temperature changes, endowing products with a unique interactive experience and anti-counterfeiting functions. For example, human touch triggers a color change, creating a visual contrast with pre-set patterns, significantly enhancing the fun and security of the label. However, existing thermochromic films still have significant drawbacks: firstly, the surface lacks wear-resistant and scratch-resistant protection, and long-term use can easily lead to functional failure due to physical wear; secondly, their function is limited, and their adhesion is weak, restricting their application potential in complex scenarios (such as curved surface bonding and metal surface fixing).

[0004] Therefore, how to solve problems such as insufficient wear resistance and limited functionality of thermochromic films through material and structural innovation while retaining their core advantages has become a key technical challenge for improving the overall performance of smart signage materials. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is the deficiency and defect mentioned in the background art, and provides a wear-resistant and scratch-resistant film with thermochromic properties, high adhesion, and magnetic properties.

[0006] To address the above problems, the present invention proposes the following technical solutions:

[0007] A wear-resistant and scratch-resistant magnetic thermochromic film comprises, in sequence, a scratch-resistant layer, a thermochromic layer, a PET layer, a composite adhesive layer, a flexible substrate layer, a magnetic layer, an adhesive layer, and a release layer.

[0008] A further technical solution is that the anti-scratch layer is obtained by UV resin photocuring, has a pencil hardness of 4H or higher, and a thickness of 1-5μm.

[0009] A further technical solution is that the thermochromic layer is made of a thermochromic film with a color-changing temperature above 35°C and a thickness of 10-35μm.

[0010] A further technical solution is that the PET layer is a transparent engineering plastic film with a thickness of 10-25μm.

[0011] A further technical solution is that the composite adhesive layer is a water-based acrylic adhesive with a thickness of 1-5 μm.

[0012] A further technical solution is that the flexible substrate layer is made of any one of PVC, EVA, TPU, or TPE flexible film.

[0013] A further technical solution is that the flexible substrate layer is provided with a pattern.

[0014] A further technical solution is that the magnetic layer is made of iron powder material and contains magnetism.

[0015] A further technical solution is that the adhesive layer is an acrylic adhesive.

[0016] A further technical solution is that the release layer is a silicone oil release film with light release force.

[0017] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:

[0018] This utility model provides a wear-resistant and scratch-resistant magnetic thermochromic film, comprising, in sequence, a scratch-resistant layer, a thermochromic layer, a PET layer, a composite adhesive layer, a flexible substrate layer, a magnetic layer, an adhesive layer, and a release layer. Through the synergistic design of the multi-layer structure, it effectively solves key problems such as insufficient wear resistance, limited functionality, and restricted application scenarios of existing thermochromic films. Specifically, by introducing a scratch-resistant layer, a magnetic layer, and using a flexible substrate, it achieves multi-functional integration of wear-resistant protection, magnetic adsorption, flexible bonding, and high-strength adhesion. This not only improves the durability and interactive experience of the thermochromic film but also overcomes its application bottleneck in complex environments (such as outdoors, curved surfaces, and metal surfaces), combining anti-counterfeiting, decorative, and functional properties, providing an innovative path for the technological upgrading of intelligent identification materials. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 A schematic diagram of the wear-resistant and scratch-resistant magnetic temperature-changing film structure provided in the embodiment of this utility model.

[0023] Figure Labels

[0024] 1. Scratch-resistant layer; 2. Temperature-sensitive layer; 3. PET layer; 4. Composite adhesive layer; 5. Flexible substrate layer; 6. Magnetic layer; 7. Adhesive layer; 8. Release layer. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] See Figure 1The figure shows a schematic diagram of the wear-resistant and scratch-resistant magnetic thermochromic film structure provided in this embodiment. As can be seen from the figure, the wear-resistant and scratch-resistant magnetic thermochromic film includes, in sequence, a scratch-resistant layer 1, a thermochromic layer 2, a PET layer 3, a composite adhesive layer 4, a flexible substrate layer 5, a magnetic layer 6, an adhesive layer 7, and a release layer 8.

[0029] In a specific embodiment, the anti-scratch layer 1 is obtained by UV resin photocuring, has a pencil hardness of 4H or higher, and a thickness of 1-5μm.

[0030] In this embodiment, the thickness of the anti-scratch layer 1 is 4μm.

[0031] In this embodiment, a UV-curable resin with a thickness of 1-5μm is used as the outermost layer, which significantly improves the surface hardness and wear resistance, avoids functional failure of the temperature-sensitive layer due to physical scratches or environmental corrosion, and extends the service life.

[0032] Understandably, UV-curable resins are typically composed of polyfunctional acrylic resins, photoinitiators, and curing agents. Under UV light, the initiator decomposes to produce many free radicals. These free radicals then undergo free radical polymerization with the polyfunctional groups on the acrylic resin, resulting in rapid curing and the formation of a very hard coating. Because of its high degree of polymerization, the coating's hardness increases dramatically, reaching over 4H pencil hardness, and exhibiting excellent wear and scratch resistance.

[0033] The anti-scratch layer 1 in this embodiment only requires UV light irradiation to cure, which is a very clean, environmentally friendly and simple manufacturing process that does not produce byproducts.

[0034] In this embodiment, the anti-scratch layer 1 is set on the outermost layer. On the one hand, it provides wear and scratch resistance, and on the other hand, it can protect the thermochromic film in the thermochromic layer, preventing the thermochromic film from being exposed to the air for a long time, which would cause corrosion, scratches and photothermal damage.

[0035] In specific implementation, the thermochromic layer 2 is made of a thermochromic film with a color-changing temperature above 35°C and a thickness of 10-35μm.

[0036] It should be noted that in this embodiment, the thermochromic film displays the color of the film itself at room temperature, and forms a single colorless and transparent color above a specific temperature (e.g., 35°C), which contrasts sharply with the color of the room temperature marking, thus revealing the pattern on the surface of the film material below the coating, which serves as an anti-counterfeiting measure and also brings consumers a brand-new experience.

[0037] In this embodiment, the thickness of the thermochromic layer 2 is 25 μm.

[0038] In specific implementations, the PET layer 3 is a transparent engineering plastic film with a thickness of 10-25 μm. In this embodiment, the thickness of the PET layer 3 is 10 μm.

[0039] In specific implementation, the composite adhesive layer 4 is a water-based acrylic adhesive with a thickness of 1-5 μm. Water-based acrylic adhesives have strong adhesion, especially to flexible substrates with low surface energy. Moreover, because they are water-based, the solvent is generally deionized water, which has no corrosive effect on flexible substrates.

[0040] In this embodiment, the thickness of the composite adhesive layer 4 is 2μm.

[0041] In specific implementation, the flexible substrate layer 5 is made of any one of PVC, EVA, TPU, or TPE flexible film.

[0042] Flexible films are chosen for their ability to adhere tightly to the surface of the object being adhered to, and they can also achieve perfect adhesion to objects with curved surfaces. The thickness of the flexible film should ideally be 2-10 μm.

[0043] In this embodiment, the flexible substrate layer 5 is a PVC flexible film with a thickness of 2μm.

[0044] In practice, the flexible substrate layer 5 has a pattern. The pattern can be text, numbers, photos, QR codes, graphics, or other identification information, and can also be customized according to consumer needs. Generally, the pattern is formed on the surface of the flexible substrate using screen printing, gravure printing, or spraying methods.

[0045] In practice, the magnetic layer 6 is made of iron powder and contains magnetism. The thickness of the magnetic layer 6 can be designed according to requirements, generally 4-25 μm. The introduction of the magnetic layer 6 enables the wear-resistant and scratch-resistant magnetic thermochromic film to firmly adhere to the surface of metal or non-metal products, greatly expanding the application range of thermochromic marking films.

[0046] In this embodiment, the thickness of magnetic layer 6 is 6 μm.

[0047] In specific implementation, the adhesive layer 7 is an acrylic adhesive, which is a special acrylic ester adhesive with temperature resistance and anti-aging properties, and can firmly bond ceramic, wood products, stone, glass, plastic and other objects.

[0048] The thickness of the adhesive layer 7 can be designed according to actual needs. In this embodiment, the thickness of the adhesive layer 7 is 10μm.

[0049] In practice, the release layer 8 is a silicone oil release film with light release force, which can both protect the adhesive layer and make it easy to remove.

[0050] The thickness of the release layer 8 can be designed according to actual needs. In this embodiment, the thickness of the release layer 8 is 10μm.

[0051] The following describes the preparation process of the wear-resistant and scratch-resistant magnetic thermochromic film provided in this embodiment:

[0052] Step S100: The pattern information to be marked is pre-printed on the surface of the flexible substrate using screen printing technology to obtain a flexible substrate layer 5 containing the pattern.

[0053] In step S200, a magnetic material is coated onto the other side of the flexible substrate layer 5 obtained in step S100 using a roller coating method to form a magnetic layer 6. Specifically, a slurry made of magnetic iron powder is roller-coated onto the other side of the flexible substrate layer 5, and after drying, the magnetic layer 6 is obtained. The thickness can be designed according to requirements.

[0054] In step S300, a thermochromic material is coated onto the surface of the engineering film PET using a roller coating or spray coating method to form a PET layer 3 with the thermochromic layer 2 attached. Specifically, a thermochromic coating is used, which, after drying into a film, provides a thermochromic layer, giving the material a color-changing function and a magical color-changing property. Different colors of thermochromic coatings can be selected from the market according to different consumer needs.

[0055] Step 400: Apply another layer of UV resin to the thermochromic layer 2 using a textured roller coating method, and cure it with UV light to obtain the scratch-resistant layer 1. The scratch-resistant layer 1 serves to protect the thermochromic layer 2 and provides wear-resistant and scratch-resistant properties.

[0056] In step S500, a layer of composite adhesive is applied to the other side of the PET layer 4 to obtain the composite adhesive layer 4. The composite adhesive layer 4 is then attached to the patterned surface of the flexible substrate layer 5 to firmly bond the PET to the substrate with the pre-designed pattern.

[0057] In step S600, a layer of heat-resistant acrylic adhesive is applied to the surface of the release film and bonded to the magnetic layer 6 of S500 to obtain the finished wear-resistant and scratch-resistant magnetic thermochromic film.

[0058] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0059] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0064] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0065] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A wear-resistant and scratch-resistant magnetic thermochromic film, characterized in that, It consists of, in sequence, a scratch-resistant layer, a thermochromic layer, a PET layer, a composite adhesive layer, a flexible substrate layer, a magnetic layer, an adhesive layer, and a release layer.

2. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The scratch-resistant layer is obtained by UV resin photocuring, has a pencil hardness of 4H or higher, and a thickness of 1-5μm.

3. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The thermochromic layer is made of thermochromic film with a color-changing temperature above 35°C and a thickness of 10-35μm.

4. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The PET layer is a transparent engineering plastic film with a thickness of 10-25 μm.

5. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The composite adhesive layer is a water-based acrylic adhesive with a thickness of 1-5 μm.

6. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The flexible substrate layer is made of any one of PVC, EVA, TPU, or TPE flexible film.

7. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The flexible substrate layer has a pattern.

8. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The magnetic layer is made of iron powder and contains magnetism.

9. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The adhesive layer is made of acrylic adhesive.

10. The wear-resistant and scratch-resistant magnetic thermochromic film as described in claim 1, characterized in that, The release layer is a silicone oil release film with light release force.

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