Patterned film layer, preparation method thereof and automobile

Abstract

The invention relates to a patterned film layer, a preparation method thereof and an automobile. The preparation method of the patterned film layer comprises the following steps: providing a substrate, wherein at least one surface of the substrate comprises a main body region and a preset pattern region; the preset pattern area is heated, and the temperature difference between the preset pattern area and the main body area is controlled to be 10-50 DEG C; coating is arranged on the main body area and the preset pattern area of the substrate and dried; the coating includes an effect pigment. By heating the preset graphic area, when the coating containing the effect pigment is arranged on the main body area and the preset graphic area of the substrate, due to the fact that the temperature difference exists between the main body area and the preset graphic area, the arrangement of the effect pigment in the coating is different, and the main body area and the preset graphic area show different color effects; and the temperature difference range of the preset pattern area and the main body area is controlled, so that the adhesive force between the patterned film layer and the substrate is improved, and the relatively good corrosion resistance, wear resistance and weather resistance of the patterned film layer are ensured.

Description

Technical Field

[0001] This application relates to the field of materials technology, and in particular to patterned films and their preparation methods, and automobiles. Background Technology

[0002] In the automotive painting process, the car body coating is an indispensable part, undertaking functions such as corrosion prevention, protection, and decoration. With the younger generation becoming the main car buyers and the gradual promotion of new energy vehicles, consumers have increasingly higher requirements for the decorative functions of car body coatings. They are no longer satisfied with the traditional single coating state and are beginning to desire car body coatings that can present personalized customized graphics to show their unique taste and personality.

[0003] Automotive body coatings mainly consist of electrophoretic paint, intermediate coat, color coat, and clear coat. The decorative properties of the body coating primarily rely on the color coat. Automotive body painting processes include solvent-based 3C2B and 3C1B, and water-based 3C2B, 3C1B, and B1B2, etc. Under conventional painting conditions, these processes can only achieve a single color coating. Currently, the graphic requirements for body coatings are mainly met in painting workshops by partial masking and repainting after the entire vehicle body is painted: after the entire vehicle body is painted, the areas to be graphic are retained, and masking tape is used to mask the non-graphic areas. After masking, the unmasked graphic areas are sprayed with the specified color paint and clear coat. The masking tape is removed, and a scratch remover is used to smooth the masking junctions. A baking gun or heat lamp is used to heat and bake the sprayed area, and the baked area and surrounding area are then sanded and polished. However, this graphic coating method has at least the following drawbacks: 1) The masking tape application and removal process requires a high degree of precision from the operator. If the tape is uneven, has air bubbles or gaps when applied, it will cause paint leakage, making the edges of the graphic blurry and unclear. If improper force is used when removing the tape, it may tear the tape, resulting in some tape residue, or damage to the already sprayed coating, forming defects such as scratches or paint peeling; 2) Normal car body coatings go through multiple processes to form an electrophoretic paint coating, intermediate coating, color paint coating, and clear coat coating in sequence. The coatings are tightly bonded and have good adhesion and protective performance. However, the graphic coating formed by the partial masking and recoating process is a re-spraying on the basis of the original coating. The bonding force between the coatings is relatively weak, which will lead to a decrease in corrosion resistance, wear resistance and weather resistance; 3) When using a baking gun or baking lamp to bake the sprayed area, it is difficult to accurately control the baking temperature due to the characteristics of the equipment. For example, uneven temperature distribution of the baking gun or baking lamp can easily lead to excessively high or low local temperatures in the sprayed area; when the local temperature is too high, the coating may discolor, blister, crack, etc., which seriously affect the appearance and performance of the coating; when the local temperature is too low, the coating is not fully cured, and the hardness and adhesion are insufficient, which can easily lead to problems such as paint peeling and flaking during subsequent use; 4) Waste of coating capacity, manpower and coating materials, resulting in increased costs for this type of graphic coating.

[0004] Therefore, it is necessary to improve traditional technologies. Summary of the Invention

[0005] Based on this, this application provides a high-quality patterned film layer and its preparation method, as well as an automobile.

[0006] The technical solution to the above-mentioned technical problems in this application is as follows.

[0007] The first aspect of this application provides a method for preparing a patterned film layer, comprising the following steps:

[0008] A substrate is provided, wherein at least one surface of the substrate includes a main body region and a preset graphic region;

[0009] The preset graphic area is heated, and the temperature difference between the preset graphic area and the main body area is controlled to be 10℃~50℃.

[0010] The coating is applied to the main area and the pre-defined pattern area of ​​the substrate and then dried; the coating includes effect pigments.

[0011] In some embodiments, the effect pigment in the method for preparing the patterned film layer includes at least one of aluminum powder and pearlescent pigment.

[0012] In some embodiments, in the method for preparing the patterned film layer, the effect pigment has a mass content of 2% to 5% in the coating.

[0013] In some embodiments, the temperature of the preset patterned area is 30°C to 60°C in the method for preparing the patterned film.

[0014] In some embodiments, the method for preparing the patterned film layer further includes a host resin, a crosslinking resin, a rheology modifier, and a solvent.

[0015] In some embodiments, in the method for preparing the patterned film, the coating comprises the following components by mass parts:

[0016] The main resin consists of 11-15 parts, crosslinking resin consists of 5-7 parts, rheology modifier consists of 1-3 parts, effect pigment consists of 2-5 parts, and solvent consists of 70-90 parts.

[0017] In some embodiments, in the method for preparing the patterned film, the coating material satisfies at least one of the following characteristics:

[0018] (1) The main resin includes at least one of acrylic resin, polyester resin and polyurethane resin;

[0019] (2) The crosslinking resin includes an amino resin;

[0020] (3) The rheology modifier includes polyamide wax;

[0021] (4) The solvent includes at least one of water and organic solvents.

[0022] In some embodiments, in the method for preparing the patterned film layer, the substrate includes a first surface and a second surface opposite to the first surface, the first surface includes a main region and a preset patterned region, and the heating method includes one of the following features:

[0023] (1) Heating the preset pattern area of ​​the first surface;

[0024] (2) Heating the area of ​​the second surface corresponding to the preset graphic area;

[0025] (3) A high specific heat material is provided on the second surface in the area corresponding to the preset graphic area, and the first surface is heated. The specific heat capacity of the high specific heat material is ≥1.4 J / (K·g).

[0026] The second aspect of this application provides a patterned film layer, which is prepared using the method for preparing the patterned film layer provided in the first aspect.

[0027] A third aspect of this application provides an automobile that includes the patterned film layer provided in the second aspect.

[0028] In the method for preparing the patterned film layer of this application, a substrate with at least one surface including a main area and a preset patterned area is provided. By heating the preset patterned area, when a coating including effect pigments is applied to the main area and the preset patterned area of ​​the substrate, due to the temperature difference between the main area and the preset patterned area, the arrangement of effect pigments in the coating will be different, so that the main area and the preset patterned area exhibit different color effects, thereby realizing the patterning of the film layer; and by controlling the temperature difference range between the preset patterned area and the main area, the adhesion between the patterned film layer and the substrate is improved, ensuring that the patterned film layer has good corrosion resistance, wear resistance and weather resistance.

[0029] The method for preparing the patterned film layer in this application does not require additional spraying processes and operations, saving production capacity, manpower and material costs, and avoiding the occurrence of quality defects caused by adding additional spraying processes. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application and to more completely understand this application and its beneficial effects, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram showing the arrangement of the effect materials at different temperatures;

[0032] Figure 2 A schematic diagram of a heating method provided for one embodiment;

[0033] Figure 3 This is a schematic diagram of the structure of a patterned film layer provided in one embodiment. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the embodiments and examples. It should be understood that these embodiments and examples are only used to illustrate the present application and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to make the disclosure of the present application more thorough and comprehensive.

[0035] It should also be understood that this application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various alterations or modifications without departing from the spirit of this application, and the resulting equivalent forms also fall within the protection scope of this application. For example, features described or illustrated as part of one embodiment can be combined in a suitable manner in another embodiment to produce new embodiments. Furthermore, numerous specific details are set forth in the following description to provide a fuller understanding of this application; it should be understood that this application can be implemented without one or more of these details.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for descriptive purposes only and is not intended to be limiting of the application.

[0037] Unless otherwise stated or in case of contradiction, the terms or phrases used herein shall have the following meanings:

[0038] In this application, the terms "multiple", "various", "multiple times", etc., unless otherwise specified, refer to a quantity greater than or equal to 2. For example, "one or more" means one or more than or equal to two.

[0039] The terms “combinations of,” “any combination of,” and “any combination of” used in this article include all suitable combinations of any two or more of the listed items.

[0040] In this document, the term "suitable" as used in "suitable combination", "suitable method", "any suitable method", etc., refers to the ability to implement the technical solution of this application, solve the technical problem of this application, and achieve the expected technical effect of this application.

[0041] In this document, terms such as "preferred," "better," "more suitable," and "ideal" are merely descriptions of more effective implementation methods or embodiments, and should be understood not to limit the scope of protection of this application. If multiple "preferred" terms appear in a technical solution, unless otherwise specified and there are no contradictions or mutual constraints, each "preferred" term shall be independent.

[0042] In this application, terms such as "further," "even further," and "particularly" are used to describe purposes and indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0043] In this application, "optionally," "optionally," and "optional" mean that something is optional, that is, it means that it is selected from either "with" or "without." If there are multiple "optional" entries in a technical solution, unless otherwise specified, and there are no contradictions or mutual constraints, each "optional" entry shall be independent.

[0044] In this application, the terms "first aspect," "second aspect," "third aspect," "fourth aspect," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first," "second," "third," "fourth," etc., serve only as a non-exhaustive enumeration and should be understood not to constitute a closed limitation on quantity.

[0045] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0046] In this application, when numerical intervals (i.e., numerical ranges) are mentioned, unless otherwise specified, the distribution of selectable numerical values ​​within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include numerical interval types such as percentage intervals, ratio intervals, and proportion intervals.

[0047] Unless otherwise specified, the temperature parameters in this application are permitted to be either constant-temperature treatment or variations within a certain temperature range. It should be understood that the constant-temperature treatment allows temperature fluctuations within the precision range of the instrument control, such as ±5℃, ±4℃, ±3℃, ±2℃, or ±1℃.

[0048] In this application, the terms "room temperature" or "normal temperature" generally refer to 4℃ to 35℃, for example, 20℃ ± 5℃. In some embodiments of this application, "room temperature" or "normal temperature" refers to 10℃ to 30℃. In some embodiments of this application, "room temperature" or "normal temperature" refers to 20℃ to 30℃.

[0049] In this application, if the unit of a data range is only followed by the right endpoint, it indicates that the units of the left and right endpoints are the same. For example, 3~5 h means that the units of the left endpoint "3" and the right endpoint "5" are both h (hours).

[0050] All references to documents mentioned in this application are incorporated herein by reference as if each document were individually incorporated by reference. Unless they conflict with the inventive purpose and / or technical solution of this application, all cited documents are incorporated herein by reference in their entirety and for all purposes. When citing documents in this application, the definitions of relevant technical features, terms, nouns, phrases, etc., are also incorporated herein by reference. When citing documents in this application, examples and preferred embodiments of the cited technical features may also be incorporated herein by reference, but only to the extent that they enable the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, this application shall prevail or modifications shall be made adaptably to the description in this application.

[0051] The mass or weight of the relevant components mentioned in the embodiments of this application can refer not only to the specific content of each component, but also to the proportional relationship of mass or weight between the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this application is within the scope disclosed in the embodiments of this application. Specifically, the mass or weight mentioned in the embodiments of this application can be units known in the chemical industry, such as μg, mg, g, and kg.

[0052] One embodiment of this application provides a method for preparing a patterned film layer, including the following steps:

[0053] A substrate is provided, and at least one surface of the substrate includes a main body area and a preset graphic area;

[0054] The preset graphic area is heated, and the temperature difference between the preset graphic area and the main body area is controlled to be 10℃~50℃.

[0055] Apply the coating to the main area and the pre-designed graphic area of ​​the substrate and let it dry; the coating includes effect pigments.

[0056] By heating the pre-designed area, when a coating including effect pigments is applied to the main area and the pre-designed area of ​​the substrate, the arrangement of the effect pigments in the coating will differ due to the temperature difference between the main area and the pre-designed area, resulting in different color effects in the main area and the pre-designed area, thus achieving film patterning. Furthermore, by controlling the temperature difference range between the pre-designed area and the main area, the adhesion between the patterned film and the substrate is improved, ensuring good corrosion resistance, wear resistance, and weather resistance of the patterned film.

[0057] It is understandable that the main body area and the preset graphic area do not overlap, and the main body area and the preset graphic area together constitute the first surface. Figure 1 This is a schematic diagram showing the arrangement of effect pigments in the coating at different temperatures in the main region and the preset graphic region. Figure 1 In the diagram, 'a' represents the arrangement of effect pigments in the main body region. Figure 1 In the diagram, b represents the arrangement of effect pigments in the preset graphic area. Due to temperature differences, the arrangement of effect pigments varies, resulting in different color effects.

[0058] The above-mentioned method for preparing patterned film layers can form specific patterns on the coating surface during the normal paint coating process, without the need for additional spraying processes and operations, saving production capacity, labor and material costs, and avoiding the occurrence of quality defects caused by adding additional spraying processes.

[0059] It is understood that the temperature difference between the preset graphic area and the main body area includes, but is not limited to, 10℃, 11℃, 12℃, 13℃, 14℃, 15℃, 16℃, 17℃, 18℃, 19℃, 20℃, 21℃, 22℃, 23℃, 24℃, 25℃, 26℃, 27℃, 28℃, 29℃, 30℃, 31℃, 32℃, 33℃, 34℃, 35℃, 36℃, 37℃, 38℃, 39℃, 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃, and 50℃; in some examples, it can be any two of these point values ​​as the end values, and the same applies below. Optionally, the temperature difference between the preset graphic area and the main body area is 10℃~35℃.

[0060] In some of these examples, the effect pigments used in the preparation of the patterned film include at least one of aluminum powder and pearlescent pigments. It is understood that the aluminum powder and pearlescent pigments are arranged differently at different temperatures.

[0061] In some examples, the mass content of the effect pigment in the coating is 2% to 5% in the preparation method of the patterned film. It is understood that the mass content of the effect pigment in the coating includes, but is not limited to, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, 4%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, and 5%. Optionally, the mass content of the effect pigment in the coating is 2.5% to 4.5%. By controlling the mass content of the effect pigment in the coating, the adhesion, corrosion resistance, abrasion resistance, and weather resistance of the patterned film are not affected while achieving film patterning.

[0062] In some examples, the temperature of the preset patterned region in the preparation method of the patterned film is 30℃~70℃. It can be understood that the temperature of the preset patterned region includes, but is not limited to, 30℃, 31℃, 32℃, 33℃, 34℃, 35℃, 36℃, 37℃, 38℃, 39℃, 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃, 50℃, 51℃, 52℃, 53℃, 54℃, 55℃, 56℃, 57℃, 58℃, 59℃, 60℃, 61℃, 62℃, 63℃, 64℃, 65℃, 66℃, 67℃, 68℃, 69℃, and 70℃. By controlling the temperature of the preset patterned region, the adhesion, corrosion resistance, wear resistance, and weather resistance of the patterned film are achieved without affecting its patterning properties.

[0063] It is understood that in the method for preparing the patterned film layer provided in this application, the coating can be a water-based coating or a solvent-based coating.

[0064] In some of these examples, the coating material also includes a host resin, a crosslinking resin, a rheology modifier, and a solvent in the preparation method of the patterned film.

[0065] In some of these examples, the coating comprises the following components by mass parts:

[0066] The main resin consists of 11-15 parts, crosslinking resin consists of 5-7 parts, rheology modifier consists of 1-3 parts, effect pigment consists of 2-5 parts, and solvent consists of 70-90 parts.

[0067] It is understood that, by weight parts, the main resin in the coating includes, but is not limited to, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts, and 15 parts; the crosslinking resin includes, but is not limited to, 5 parts, 5.1 parts, 5.2 parts, 5.3 parts, 5.4 parts, 5.5 parts, 5.6 parts, 5.7 parts, 5.8 parts, 5.9 parts, 6 parts, and 6.1 parts. 6.2 parts, 6.3 parts, 6.4 parts, 6.5 parts, 6.6 parts, 6.7 parts, 6.8 parts, 6.9 parts, 7 parts; rheology modifiers including but not limited to 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts. 2.7 parts, 2.8 parts, 2.9 parts, 3 parts; effect pigments include, but are not limited to, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 4.8 parts, 4.9 parts, 5 parts; solvents including but not limited to 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts.

[0068] In some of these examples, the coating, by mass percentage, comprises the following components in the method for preparing the patterned film:

[0069] The main resin is 11%~15%, crosslinking resin is 5%~7%, rheology modifier is 1%~3%, effect pigment is 2%~5%, and solvent is 70%~90%.

[0070] In some of these examples, in the method for preparing the patterned film, the coating consists of the following components by mass parts:

[0071] The main resin consists of 11-15 parts, crosslinking resin consists of 5-7 parts, rheology modifier consists of 1-3 parts, effect pigment consists of 2-5 parts, and solvent consists of 70-90 parts.

[0072] In some of these examples, the main resin in the method for preparing the patterned film includes at least one of acrylic resin, polyester resin, and polyurethane resin.

[0073] In some of these examples, the crosslinking resin used in the preparation of the patterned film includes an amino resin.

[0074] In some of these examples, the rheology modifiers used in the preparation of the patterned film include polyamide wax.

[0075] In some examples, the solvent used in the preparation of the patterned film includes at least one of water and an organic solvent. Optionally, the organic solvent includes at least one of ethylene glycol butyl ether and isooctanol.

[0076] In some of these examples, the viscosity of the coating is 700 mPa·s to 900 mPa·s in the method for preparing the patterned film.

[0077] In some of these examples, the method for preparing a patterned film includes a substrate comprising a first surface and a second surface opposite to the first surface, wherein the first surface comprises a main region and a preset patterned region.

[0078] In some examples, the method for preparing the patterned film involves heating a region on the second surface corresponding to a predetermined pattern area. This region refers to the area on the second surface covered by the predetermined pattern area in the orthographic projection along the thickness direction of the substrate; that is, the back side of the predetermined pattern area. Optionally, a heating device is used to heat the region on the second surface corresponding to the predetermined pattern area, and the heating device has the same pattern as the predetermined pattern area.

[0079] In some examples, the method for preparing the patterned film layer is described in [reference needed]. Figure 2 The heating device 20 is adsorbed onto the area corresponding to the preset pattern region on the second surface B for heating. The pattern of the heating device is consistent with that of the preset pattern region. This is understandable. Figure 2 Surface A is the first surface, which is the surface where the preset graphic area is located.

[0080] After applying the paint to the main area and the pre-defined graphic area of ​​the substrate and allowing it to dry, the graphic effect is shown in the image. Figure 3 There is a difference in color depth between the coating color of the main area A1 on the base A surface and the coating color of the preset graphic area A2.

[0081] Furthermore, a timer device is used to set the heating start and end times, ensuring that the heating device automatically shuts off the moment the paint is sprayed, precisely controlling the temperature difference between the preset graphic area and the main body area. Furthermore, the heating temperature is 30℃~60℃. This can be understood as including, but is not limited to, 30℃, 32℃, 35℃, 38℃, 40℃, 42℃, 45℃, 48℃, 50℃, 52℃, 55℃, 58℃, and 60℃. By controlling the heating temperature and time, the temperature difference between the main body area and the preset graphic area is avoided due to the thermal conductivity of the substrate. Immediately after heating, the part to be sprayed is placed into the paint (color paint) spraying chamber for spraying.

[0082] In some examples, in the method for preparing the patterned film, a high specific heat material is placed on the region of the second surface corresponding to the preset pattern area, and the first surface is heated. The specific heat capacity of the high specific heat material is ≥1.4 J / (K·g). Optionally, the specific heat capacity of the high specific heat material is 1.4 J / (K·g)~1.7 J / (K·g). It can be understood that the specific heat capacity of the high specific heat material includes, but is not limited to, 1.4 J / (K·g), 1.5 J / (K·g), 1.6 J / (K·g), and 1.7 J / (K·g). It can also be understood that the pattern of the film formed by the high specific heat material is consistent with the pattern of the preset pattern area. It can also be understood that after the first surface is heated, it is sent into the paint (color paint) spraying chamber for spraying. When the sprayed part runs to the spraying position, the temperature of the main body area will drop significantly. Because the preset pattern area has a high specific heat material on its back, the temperature at this position drops more slowly, creating a temperature difference between the main body area and the preset pattern area.

[0083] In some examples, the method for preparing the patterned film layer includes spraying, where the coating is applied to the main area and the pre-defined patterned area of ​​the substrate. It is understood that heating is stopped when the coating is started. It is also understood that the spraying process of this application is applicable to all spraying processes, including but not limited to solvent-based 1C1B, 2C1B, 3C2B, and 3C1B processes; water-based 3C2B, 3C1B, and B1B2 processes, etc. Here, "C" represents coating, "B" represents baking, and 1C1B is a one-coat-one-bake process.

[0084] In some examples, the drying temperature in the preparation method of the patterned film is 140℃~150℃. It can be understood that the drying temperature includes, but is not limited to, 140℃, 141℃, 142℃, 143℃, 144℃, 145℃, 146℃, 147℃, 148℃, 149℃, and 150℃; it can also be understood that the coating has viscosity during the drying process, which will not affect the rearrangement of the effect pigments.

[0085] The method for preparing the patterned film layer provided in this application does not affect the basic properties of the film layer in the patterned area, and the properties are basically consistent with those of the film layer in the main area. It has good adhesion, hardness, bending resistance, cupping, impact resistance and stone chip resistance, indicating good mechanical properties. It has strong resistance to acids, alkalis, moisture, MT5, E10, mixed xylene, glass cleaning fluid, antifreeze and salt spray, indicating strong chemical resistance. It has good resistance to thermal cycling, QUV and SWOM, indicating good weather resistance.

[0086] One embodiment of this application provides a patterned film layer, which is prepared using the above-described method for preparing patterned film layers.

[0087] One embodiment of this application provides an automobile that includes the above-described patterned film layer.

[0088] In some of these examples, in automobiles, the body coating includes an electrophoretic paint coating, a mid-coat coating, a color paint coating, and a clear coat coating, wherein the color paint coating includes the aforementioned patterned film layer.

[0089] It is understood that by applying the above-mentioned method for preparing patterned film layers to the coating of automobile bodies, personalized custom patterns can be achieved on the body coating. Furthermore, it is understood that this application does not limit the types and preparation of electrophoretic paint coatings, intermediate coatings, and clear coat coatings, as long as they can be implemented in the field.

[0090] The present application will be described in further detail below with reference to specific embodiments, but the embodiments of the present application are not limited thereto.

[0091] Example 1

[0092] The process employs a water-based 3C1B process. The normal body temperature within the painting line is 25℃. Before color paint application, an automatic electric heating device is installed on the back of the area to be painted (the pre-defined graphic area) to heat it to 35℃, ensuring a temperature difference of 10℃ between the pre-defined graphic area and the normal body (main body area). The heating device is automatically shut off just before color paint application. The paint used is a water-based coating, comprising, by weight, 15 parts acrylic resin, 7 parts amino resin, 1.5 parts polyamide wax, 2.5 parts aluminum powder, and 74 parts water. After color paint application, other related coatings are applied and baked according to the normal subsequent process, forming the predetermined graphic in the pre-defined graphic area.

[0093] Example 2

[0094] The process employs a water-based 3C2B process. The normal body temperature within the painting line is 25℃. Before color paint application, an electric heating device heats the surface to be painted (the pre-defined graphic area) to 50℃, ensuring a temperature difference of 10℃~15℃ between the pre-defined graphic area and the normal body (main body area). The heating device automatically shuts off just before color paint application. The paint used is water-based, comprising, by weight, 15 parts acrylic resin, 7 parts amino resin, 1.5 parts polyamide wax, 1.5 parts aluminum powder, 2 parts pearlescent powder, and 73 parts water. After color paint application, other related coatings are applied and baked according to the normal subsequent process, forming the predetermined graphic in the pre-defined graphic area.

[0095] Example 3

[0096] The process employs a solvent-based 3C2B method. The normal body temperature within the painting line is 25℃. Before applying the color paint, a 2 cm thick layer of structural adhesive with a specific heat capacity of 1.4 J / (K·g) is applied to the back of the surface to be painted (the pre-defined graphic area). This adhesive heats the surface to 45℃. When the vehicle moves to the color paint painting position, the temperature difference between the pre-defined graphic area and the normal body (main body area) is maintained at 10℃~15℃. The paint used is a solvent-based coating, comprising, by weight, 15 parts acrylic resin, 7 parts amino resin, 1.5 parts polyamide wax, 3 parts pearlescent coating, and 73.5 parts n-butyl acetate. After the color paint is applied, other related coatings are applied and baked according to the normal subsequent process to form the predetermined graphic in the pre-defined graphic area.

[0097] Example 4

[0098] It is basically the same as Example 1, except that it is heated to 45°C to ensure that the temperature difference between the preset graphic area and the normal car body is 20°C.

[0099] Example 5

[0100] It is basically the same as Example 1, except that it is heated to 60°C to ensure that the temperature difference between the preset graphic area and the normal car body is 35°C.

[0101] Example 6

[0102] The process is basically the same as in Example 1, except that the water-based coating includes: 15 parts acrylic resin, 7 parts amino resin, 1.5 parts polyamide wax, 5 parts aluminum powder, and 71.5 parts water.

[0103] Example 7

[0104] The process is basically the same as in Example 1, except that the water-based coating includes: 15 parts acrylic resin, 7 parts amino resin, 3 parts polyamide wax, 2.5 parts aluminum powder, and 72.5 parts water.

[0105] Comparative Example 1

[0106] It is basically the same as Example 1, except that it is heated to 30°C to ensure that the temperature difference between the preset graphic area and the normal car body is 5°C.

[0107] Comparative Example 2

[0108] It is basically the same as Example 1, except that it is heated to 85°C to ensure that the temperature difference between the preset graphic area and the normal car body is 60°C.

[0109] Performance tests were conducted on each embodiment and comparative example. The results showed that the films prepared in each embodiment met the requirements for automotive coatings, including adhesion, hardness, flexural strength, cupping, impact resistance, stone chip resistance, acid resistance, alkali resistance, moisture resistance, resistance to MT5, resistance to E10, resistance to mixed xylene, resistance to glass cleaner, resistance to antifreeze, salt spray resistance, resistance to thermal cycling, QUV, and SWOM performance.

[0110] The color difference ΔE between the graphic areas of each embodiment and comparative example and the vehicle body was tested. Colorimeter model: BYK Mac; Color difference value calculation: ΔE 45 =[(△L 45 ) 2 +(△a 45 ) 2 +(△b 45 ) 2 ] 0.5 ; △L 45 =Preset graphic area L 45 -Vehicle position L 45 ;△a 45 =Preset graphic area a 45 -Vehicle position a 45 ; △b 45 =Preset graphic area b 45 -Vehicle position b 45 L 45 a 45 b 45 These are the measured values ​​from the colorimeter; △E 45 The larger the value, the more obvious the graphic effect.

[0111] The test results are shown in Table 1.

[0112] Table 1

[0113]

[0114] As shown in Table 1, the color difference ΔE between the graphic area and the main body area in each embodiment is relatively large, which can realize graphic design; while the color difference ΔE between the graphic area and the car body in Comparative Example 1 is relatively small, the color of the graphic position is close to the color of the main body area, and the graphic position cannot be visually observed; the coating prepared in Comparative Example 2 has abnormalities such as wrinkling and roughness, which cannot meet the appearance requirements.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The embodiments described above are merely illustrative of several implementation methods of this application, intended to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A method for preparing a patterned film layer, characterized in that, Includes the following steps: A substrate is provided, wherein at least one surface of the substrate includes a main body region and a preset graphic region; The preset graphic area is heated, and the temperature difference between the preset graphic area and the main body area is controlled to be 10℃~50℃. The coating is applied to the main area and the pre-defined pattern area of ​​the substrate and then dried; the coating includes effect pigments.

2. The method for preparing the patterned film layer as described in claim 1, characterized in that, The effect pigments include at least one of aluminum powder and pearlescent pigments.

3. The method for preparing the patterned film layer as described in claim 1, characterized in that, The effect pigment has a mass content of 2% to 5% in the coating.

4. The method for preparing the patterned film layer as described in claim 1, characterized in that, The temperature of the preset graphic area is 30℃~60℃.

5. The method for preparing the patterned film layer according to any one of claims 1 to 4, characterized in that, The coating also includes a base resin, a crosslinking resin, a rheology modifier, and a solvent.

6. The method for preparing the patterned film layer as described in claim 5, characterized in that, The coating comprises the following components by weight: The main resin consists of 11-15 parts, crosslinking resin consists of 5-7 parts, rheology modifier consists of 1-3 parts, effect pigment consists of 2-5 parts, and solvent consists of 70-90 parts.

7. The method for preparing a patterned film layer as described in claim 6, characterized in that, The coating satisfies at least one of the following characteristics: (1) The main resin includes at least one of acrylic resin, polyester resin and polyurethane resin; (2) The crosslinking resin includes an amino resin; (3) The rheology modifier includes polyamide wax; (4) The solvent includes at least one of water and organic solvents.

8. The method for preparing a patterned film layer according to any one of claims 1-4 and 6-7, characterized in that, The substrate includes a first surface and a second surface opposite to the first surface. The first surface includes a main area and a preset pattern area. The heating method includes one of the following features: (1) Heating the preset pattern area of ​​the first surface; (2) Heating the area of ​​the second surface corresponding to the preset graphic area; (3) A high specific heat material is provided on the second surface in the area corresponding to the preset graphic area, and the first surface is heated. The specific heat capacity of the high specific heat material is ≥1.4 J / (K·g).

9. A patterned film layer, characterized in that, The patterned film is prepared by the method described in any one of claims 1 to 8.

10. A car, characterized in that, Includes the patterned film layer as described in claim 9.

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