3D (three-dimensional) coating film and film coating piece attached with same
By designing a 3D coating film, the problems of poor film material adaptability and limited functionality in traditional TOM processes are solved, achieving high-quality bonding and multi-functional effects on complex surfaces, and meeting the market's diverse needs for product appearance and function.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-20
AI Technical Summary
In the traditional TOM process, the film material is difficult to adapt to complex curved surfaces during the lamination process, resulting in wrinkles and limited functionality, which cannot meet the market's diverse needs for product appearance and function.
The 3D coating film consists of a PO base film, a semi-cured functional layer, and a hot melt adhesive layer. The PO base film has high ductility and temperature resistance. The semi-cured functional layer can be deformed to adapt to the surface shape and can be fitted with textured layers, liquid crystal layers, etc. The hot melt adhesive layer is used for bonding, and a protective film protects the hot melt adhesive layer.
It achieves good adhesion between the membrane material and complex surfaces, improves the coating quality and aesthetics, and meets multiple functional requirements such as antibacterial, anti-fingerprint, and anti-glare.
Smart Images
Figure CN224013151U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to surface film covering technical field especially relates to a 3D covering film and film covering spare with the covering film. BACKGROUND
[0002] In the field of modern industrial manufacturing, the appearance quality and functionality of products are increasingly valued. As an important surface treatment technology, film covering technology is widely used in many industries such as automotive interiors, electronic product housings, furniture decoration, etc. Through film covering, not only the appearance quality of the product can be improved, but also the wear resistance, corrosion resistance and other properties of the product can be enhanced.
[0003] Traditional TOM (Thermoforming Overlay Molding) process plays an important role in the field of film covering. The TOM process usually involves softening a flat film material by heating, then using vacuum suction to make it adhere to the surface of a mold or product with three-dimensional shape, and then cooling and setting to complete the film covering process. However, the TOM process has limitations in terms of adaptability in practical applications. The flat film material used in traditional TOM process often cannot fully adapt to complex curved surface structures when adhering to the surface of a product with three-dimensional shape. For some parts with deep grooves, protrusions or irregular shapes, the film material is prone to wrinkles, uneven stretching and other problems, resulting in poor film covering effect and affecting the appearance quality of the product. In addition, the film material used in traditional TOM process has relatively single function, mainly focusing on providing basic decoration and protection. With the increasing demand for product functionality in the market, such as the need for antibacterial, anti-fingerprint, anti-glare and other special functions, the film material of traditional TOM process cannot meet these needs.
[0004] Therefore, in order to solve the problems of traditional TOM process, improve the quality and efficiency of 3D film covering, and meet the diversified needs of product appearance and function in the market, it is necessary to develop a new type of 3D covering film. SUMMARY
[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and to provide a 3D covering film that can better adapt to the surface shape of the film covering part, solve the problems of poor adaptability of the film material, single function, complex process and difficulty in realizing texture in the traditional TOM process, and improve the film covering quality and efficiency.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a 3D covering film can be attached to the surface of a film covering part, the 3D covering film comprises:
[0007] A flexible PO base film that can match the shape of the surface of the film covering part and cover it;
[0008] a semi-cured functional layer attached below the PO base film, capable of deforming to adapt to the surface shape of the film-coated object and being cured to be attached to the surface of the film-coated object;
[0009] a hot melt adhesive layer attached below the functional layer, for bonding to the surface of the film-coated object; and,
[0010] a protective film peelably attached below the hot melt adhesive layer, for protecting the hot melt adhesive layer.
[0011] Optionally, the semi-cured functional layer is configured to be semi-cured by baking a semi-liquid coating layer and fully cured by UV irradiation.
[0012] Optionally, the semi-cured functional layer comprises a textured layer.
[0013] Optionally, the textured layer comprises a UV-hardened liquid coating layer or a liquid crystal coating layer provided with a texture.
[0014] Optionally, the semi-cured functional layer comprises an outer textured layer, a TPU layer and an inner textured layer stacked in sequence from top to bottom.
[0015] Optionally, the semi-cured functional layer comprises one or more of a plating layer and a liquid crystal layer.
[0016] Optionally, the semi-cured functional layer comprises a silk printing layer, and the hot melt adhesive layer is arranged below the silk printing layer.
[0017] Optionally, the PO base film has a thickness of 80-150 μm.
[0018] Optionally, the 3D covering film is attached to the surface of the film-coated object by vacuum hot pressing adsorption.
[0019] The utility model discloses still adopt following technical scheme realization: a film-coated object, including base body and the covering film of attaching to the surface of base body, the covering film is as any one of the 3D covering film described above.
[0020] Due to the adoption of the above technical scheme, the 3D covering film provided by the utility model has the following beneficial effects: the 3D covering film of the utility model adopts a PO base film, has high ductility and high temperature resistance, and simultaneously adopts a semi-cured functional layer capable of deforming to adapt to the surface shape of a film-coated object, so that good adhesion can be realized for complex curved surfaces, deep grooves or protrusions, and the quality and aesthetic degree of the film coating are improved. In addition, the semi-cured functional layer can be provided with a textured layer, a liquid crystal layer, a silk printing layer and the like as required, to realize various functions such as antibacterial, anti-fingerprint, anti-glare, dynamic optical effect and personalized pattern, and meet the diversified functional requirements of the market for products. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following only relate to some embodiments of the present application and are not a limitation on the present application.
[0022] Fig. 1 is a structural schematic view of the 3D coating film embodiment one of the present application.
[0023] Fig. 2 is a structural schematic view of the 3D coating film embodiment two of the present application.
[0024] Fig. 3 is a structural schematic view of the 3D coating film embodiment three of the present application.
[0025] Mark explanation:
[0026] 100, 3D coating film; 1, PO base film; 2, functional layer; 21, texture layer; 22, liquid crystal layer; 23, silk printing layer; 24, inner texture layer; 25, TUP layer; 26, outer texture layer; 3, hot melt adhesive layer; 4, protective film. Specific implementation
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the present application will be further described in detail in combination with the drawings. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0028] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0029] Unless otherwise defined, technical terms or scientific terms used in the present patent document shall have the meanings as commonly understood by one of ordinary skill in the art to which the present patent belongs. The terms "first", "second", and similar terms as used in the patent specification and claims of the present patent do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one", "a", or "the" as well as similar terms do not denote a quantity of any number, but rather denote the existence of at least one of the frequently used terms. The terms "including", "containing", and similar terms are intended to encompass the elements or objects listed after the terms "including" or "containing" as well as equivalents thereof, and do not exclude other elements or objects. The terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", and the like are used to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly. They are used to facilitate the description of the present patent and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present patent.
[0030] In the description of the present patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", and "connection" should be interpreted broadly, for example, they can be fixedly connected, or separably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be connected internally between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present patent can be understood according to the specific circumstances.
[0031] Some embodiments of the present patent will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.
[0032] Referring to Figs. 1 to 3 The present patent provides a 3D coating film 100, which can be attached to the surface of a to-be-coated member. The 3D coating film includes a PO base film 1, a semi-cured functional layer 2 attached to the lower side of the PO base film 1, a hot melt adhesive layer 3 attached to the lower side of the functional layer 2, and a protective film 4 peelably attached to the lower side of the hot melt adhesive layer 3. The semi-cured functional layer 2 can be deformed to adapt to the surface shape of the to-be-coated member, and can be cured and shaped after being attached to the to-be-coated member. The hot melt adhesive layer 3 is used to bond to the surface of the to-be-coated member, and the protective film 4 is used to protect the hot melt adhesive layer 3.
[0033] The 3D coating film 100 adopts a PO base film 1, has high ductility and high temperature resistance, and simultaneously adopts a semi-cured functional layer 2 which can be deformed to adapt to the surface shape of the coated part, so that good adhesion can be achieved on complex curved surfaces, deep grooves or protrusions, and the quality and aesthetics of the coating are improved. In addition, the semi-cured functional layer 2 can be provided with a texture layer, a liquid crystal layer, a silk printing layer and the like according to needs, to realize various functions such as antibacterial, anti-fingerprint, anti-glare, dynamic optical effect, personalized pattern and the like, so as to meet the diversified functional needs of the market for products.
[0034] The technical scheme of the utility model is described below with several specific embodiments.
[0035] Embodiment one
[0036] Please refer to Fig. 1 The 3D coating film 100 includes a PO base film 1, a semi-cured functional layer 2 located below the PO base film 1, a hot melt adhesive layer 3 arranged below the functional layer 2, and a protective film 4 which can be peeled off and covers below the hot melt adhesive layer 3.
[0037] The PO base film 1, i.e. a polyolefin (Polyolefin) film, is used as the base film of the 3D coating film 100, and is a flexible film which can be coated on the surface of the coated part in the process of coating the surface of the coated part. The material has good physical properties and chemical stability, and can meet the requirements of high ductility and high temperature resistance of the 3D coating film. The PO base film 1 can be made by extrusion molding process. In the extrusion molding process, the temperature, pressure and extrusion speed of the extruder are precisely controlled. The temperature of the extruder needs to be adjusted according to the characteristics of the PO material, generally between 150-250℃, to ensure that the material can be uniformly melted and smoothly extruded. The pressure is controlled within a suitable range to ensure the uniform thickness of the extruded film. The extrusion speed is set according to the production demand and equipment performance, usually several meters to several tens of meters per minute. In this embodiment, the thickness of the PO base film 1 is selected from 80-150μm to avoid the PO base film 1 being too thin to cause damage in the coating forming process and affect the coating performance. Preferably, the thickness of the PO base film 1 is 90-120μm, and specifically 95μm, 100μm, 105μm, 110μm, 115μm and the like. Further, the PO base film 1 can be surface pretreated by corona treatment and the like to improve its surface tension and enhance the adhesion with the subsequent coating layer, so as to ensure the stable combination between the layers.
[0038] The semi-cured functional layer 2 is a film layer in a semi-cured state between the 3D coating film 100 attached to the surface of the film to be covered and the film to be covered. The function of the semi-cured functional layer 2 can be diverse, such as achieving decoration, antibacterial, anti-fingerprint, anti-glare, dynamic optical effect, personalized pattern, etc. The semi-cured functional layer 2 can specifically include one or more of a texture layer, an elastic layer, a liquid crystal layer, a plating film layer, a silk screen layer, etc. The semi-cured functional layer 2 has the characteristic of being able to be completely cured by curing treatment from the semi-cured state. In some embodiments, the semi-cured functional layer 2 is configured to be semi-cured by baking the semi-liquid coating layer, and completely cured by UV irradiation.
[0039] The hot melt adhesive layer 3 is attached below the functional layer 2. According to the material and film covering requirements of the film to be covered, hot melt adhesive with good bonding performance and heat resistance is selected. The hot melt adhesive is uniformly coated on the surface of the semi-cured functional layer 2 by a hot melt adhesive coating machine. The coating thickness is controlled to be generally between 20-50 μm, so as to ensure that the hot melt adhesive layer 3 can provide sufficient bonding force, and at the same time, the film covering effect will not be affected due to the over-thickness.
[0040] The protective film 4 is peelably covered on the surface of the hot melt adhesive layer 3, and the protective film 4 can be made of PET or other materials. During the pasting process, attention should be paid to avoid air bubbles, so as to ensure the flatness and pasting quality of the protective film 4. The rolling method can be used to make the protective film 4 fully contact with the hot melt adhesive layer 3, so as to ensure that the protective film 4 can effectively protect the hot melt adhesive layer 3.
[0041] Embodiment two
[0042] Please refer to Fig. 2 The functional layer 2 specifically includes a texture layer 21, a liquid crystal layer 22 and a silk screen layer 23.
[0043] In the present embodiment, the texture layer 21 has textures on both sides, and the side in contact with the PO base film 1 is provided with an outer texture, while the other side is provided with an inner texture. In the present embodiment, the texture layer 21 is a UV hardening liquid coating layer provided with textures. First, the Hard Coating liquid is uniformly mixed to ensure the uniformity and stability of the coating liquid. The Hard Coating liquid is coated on the surface of the PO base film 1 by rolling or spraying. When rolling, the rolling speed and pressure are controlled to ensure the uniformity of the coating thickness; when spraying, the spray angle and spray distance of the spray gun are adjusted to ensure that the coating can uniformly cover the PO base film 1. After coating, a mold with a specific texture is used to press the surface of the coating to form the desired texture, such as wood grain, stone grain, leather grain, etc. The film material with the texture is placed in an oven for baking, and the baking temperature and time are set according to the characteristics of the Hard Coating liquid to achieve a semi-cured state of the texture layer 21. In other embodiments, the texture layer 21 can also be provided with textures on only one side.
[0044] The texture layer 21 can also be a liquid crystal coating layer with textures. The liquid crystal material is dissolved in a suitable solvent to prepare a liquid crystal coating liquid. During preparation, the ratio of liquid crystal material and solvent is strictly controlled to ensure the stability of the performance of the liquid crystal coating liquid. The liquid crystal coating liquid is coated on the surface of the PO base film 1 by a similar method to form a uniform coating. After coating, a mold with a specific texture is used to press the surface of the coating to form the desired texture, and finally, the liquid crystal coating is semi-cured.
[0045] In the present embodiment, the texture layer 21 is attached below the liquid crystal layer 22. The liquid crystal layer 22 also has a texture structure in contact with the inner texture on the lower surface of the texture layer 21. In other embodiments, the liquid crystal layer 22 can also be replaced by a plating layer.
[0046] In the present embodiment, the liquid crystal layer 22 is further attached below the silk screen layer 23. The silk screen layer is formed by printing the desired patterns and characters on the surface of the liquid crystal layer 22 using a silk screen printing process. The silk screen layer is properly dried and cured to have good adhesion and wear resistance.
[0047] In the present embodiment, the hot melt adhesive layer 3 is provided below the silk screen layer 23, and the protective film 4 is attached below the hot melt adhesive layer 3.
[0048] Embodiment Three
[0049] Please refer to Fig. 3As shown, it is the illustration of the third embodiment of the 3D coating film 100 of the utility model. In the embodiment, the functional layer 2 includes the outer texture layer 26, the TUP layer 25, the inner texture layer 24, the liquid crystal layer 22 and the silk screen layer 23 in the direction from the PO base film 1 to the protective film 4.
[0050] The preparation mode of the outer texture layer 26 and the inner texture layer 24 can be carried out with reference to the preparation mode of the texture layer 21 in the second embodiment. In the embodiment, the TUP layer 25 is arranged between the outer texture layer 26 and the inner texture layer 24. TPU (Thermoplastic Polyurethane), namely thermoplastic polyurethane elastomer, is a kind of soft glue resin. The functional layer 2 in the embodiment includes the TUP layer 25, so that the 3D coating film 100 has soft touch. The TPU layer 25 has good elasticity and flexibility, and can also buffer external force impact and protect the surface of the coating part.
[0051] The preparation mode of the liquid crystal layer 22 and the silk screen layer 23 can be set with reference to the second embodiment. The contents not described in the embodiment can be understood with reference to the description of the first and second embodiments.
[0052] The utility model also provides a kind of coating part, and coating part includes matrix, as described above 3D coating film 100 is attached to the matrix and forms the coating part. The process that 3D coating film 100 provided by the utility model is coated on the coating part is described below.
[0053] First, the cleaning treatment is carried out to the coating part to be coated, and the impurities such as oil stains and dust on the surface are removed. Cleaning can be carried out by wiping, spraying and other methods to ensure that the surface of the coating part to be coated is clean and flat.
[0054] Then, the protective film 4 of the prepared 3D coating film 100 is peeled off to expose the hot melt adhesive layer 3. In the peeling process, attention should be paid to avoid damaging the 3D coating film 100 to ensure the integrity and quality of the film material.
[0055] Next, vacuum hot pressing adsorption process is carried out.
[0056] The coating part to be coated is placed on the lower die of the vacuum hot press, the hot melt adhesive layer 3 of the 3D coating film 100 is placed in the vacuum hot press, and the hot melt adhesive layer 3 is directed to the surface of the coating part to be coated, so that the 3D coating film 100 is preliminarily aligned with the coating part to be coated. Then, the upper die of the vacuum hot press is closed, the vacuum system is started, and a vacuum environment is formed between the film 100 and the coating part to be coated, and the vacuum degree is generally controlled between-0.08 and-0.095 MPa, to ensure that the film 100 can be tightly attached to the surface of the coating part to be coated. At the same time, the heating system is started to heat the film 100, so that the hot melt adhesive layer 3 is melted.
[0057] When the hot melt adhesive layer 3 is completely melted, the film 100 is fully attached to the film-coated part after pressure maintaining for a period of time. Then, the heating system is turned off, and the cooling system is turned on to cool the film material and the film-coated part. The cooling method can be air cooling or water cooling, and the cooling temperature is generally controlled at room temperature. During the cooling process, the hot melt adhesive gradually solidifies to firmly bond the 3D covering film 100 to the surface of the film-coated part. After the cooling and shaping are completed, the film-coated part is taken out, the PO base film 1 adhered is removed, the film-coating quality is checked, and the film-coated part is obtained.
[0058] It can be known from the above description of a plurality of specific embodiments that the 3D covering film 100 provided by the utility model adopts the PO base film 1, has high ductility and high temperature resistance, and simultaneously adopts the semi-cured functional layer 2 which can be deformed to adapt to the surface shape of the film-coated part, so that good attachment can be realized on complex curved surfaces, deep grooves or protrusions, and the quality and aesthetic degree of the film coating are improved. In addition, the semi-cured functional layer 2 can be provided with a texture layer, a liquid crystal layer, a silk printing layer and the like according to needs, realizes multiple functions such as antibacterial, anti-fingerprint, anti-glare, dynamic optical effect and personalized pattern, and meets the diversified functional needs of the market for products.
[0059] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of claims.
Claims
1. A 3D coating film for attaching to the surface of an object to be coated, characterized in that, The 3D coating film includes: A flexible PO-based film that can be coated onto the surface of the part to be coated, matching the shape thereon; A semi-cured functional layer is attached beneath the PO base film, which can deform to fit the shape of the surface of the part to be coated, and is cured and attached to the surface of the part to be coated. A hot melt adhesive layer attached beneath the functional layer is used to bond the film to the surface of the part to be coated; and, A protective film is peelably attached beneath the hot melt adhesive layer to protect the hot melt adhesive layer.
2. The 3D coating film as described in claim 1, characterized in that, The semi-cured functional layer is configured to be semi-cured by baking and fully cured by UV irradiation.
3. The 3D coating film as described in claim 1 or 2, characterized in that, The semi-cured functional layer includes a texture layer.
4. The 3D coating film as described in claim 3, characterized in that, The textured layer includes a UV-cured liquid coating or a liquid crystal coating with a texture.
5. The 3D coating film as described in claim 1 or 2, characterized in that, The semi-cured functional layer includes an outer texture layer, a TPU layer, and an inner texture layer stacked sequentially from top to bottom.
6. The 3D coating film as described in claim 1 or 2, characterized in that, The semi-cured functional layer includes one or more of a coating layer and a liquid crystal layer.
7. The 3D coating film as described in claim 1 or 2, characterized in that, The semi-cured functional layer includes a screen printing layer, and the hot melt adhesive layer is disposed below the screen printing layer.
8. The 3D coating film as described in claim 1, characterized in that, The thickness of the PO base film is 80-150 μm.
9. The 3D coating film as described in claim 1, characterized in that, The 3D coating film is attached to the surface of the part to be coated by vacuum hot pressing adsorption.
10. A coated component, characterized in that, It includes a substrate and a coating film attached to the surface of the substrate, wherein the coating film is a 3D coating film as described in any one of claims 1 to 9.