Multilayer light-transmitting material and preparation method thereof

Abstract

The invention relates to a multi-layer light-transmitting material for a carrier ornament and a preparation method of the multi-layer light-transmitting material. The multilayer light-transmitting material of the present invention comprises: a first color layer (100); a first adhesive layer (800); a pattern layer (400); and a backbone layer (600); wherein the pattern layer (400) comprises a pattern area (700) and a covering area (900), the pattern layer is not attached to the first color layer (100), and the visible light transmittance of the pattern area is larger than that of the covering area; the first color layer (100) is directly connected with the first adhesive layer (800). The multi-layer light-transmitting material can be used for the carrier ornament, provides accurate pattern position degree, keeps the light-transmitting property of the carrier ornament, clearly displays the decorative pattern of the ornament when the light source in the ornament is lighted up, and provides the integral impression of the carrier ornament when the light source in the ornament is extinguished; and moreover, the method has wide adaptability to raw material selection of various skin materials, and is beneficial to reducing the production cost and carrying out commercialized production.

Description

Technical Field

[0001] The present invention relates to a multi-layer light-transmitting material for vehicle decoration. Specifically, the present invention relates to a multi-layer light-transmitting material comprising a first color layer, a first adhesive layer, a pattern layer and a skeleton layer, a preparation method thereof and use thereof for vehicle decoration. Background Art

[0002] With the rapid development of the transportation sector, vehicles have become important means of transportation. In addition to higher requirements for vehicle drivability and safety, vehicle consumers are also increasingly demanding the interior environment of vehicles. As an important part of the interior environment, the shape and function of the interior are of great significance to improving user experience.

[0003] For vehicle interiors, the integration of the interior environment, precise interior patterns, and soft interior touch can bring users a comfortable riding experience. The traditional way of realizing translucent interior skins and corresponding patterns usually directly processes the surface layer material, such as punching, laser engraving, chemical etching, etc., to achieve the effect of translucent patterns.

[0004] CN102198749B discloses a structure with a luminous visual effect, which is formed of a PU resin containing a certain solid content.

[0005] CN115179608B discloses a vehicle light-transmitting interior fabric, which provides a soft elastic feel and light transmittance.

[0006] CN113874239A discloses a control and display device for a vehicle, which realizes different display effects by selecting the wavelength of the light source in the filtering area.

[0007] The above-mentioned prior arts all involve direct processing of the surface layer material, which usually results in inaccurate pattern positioning, places high requirements on the material selection of the surface layer, and does not have the ability to widely adapt to various environments. Summary of the invention

[0008] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a multi-layer light-transmitting material for a carrier.

[0009] In a first aspect, the present invention provides a multi-layer light-transmitting material, comprising:

[0010] A first color layer 100;

[0011] A first adhesive layer 800;

[0012] pattern layer 400; and

[0013] Skeleton layer 600;

[0014] The pattern layer 400 includes a graphic area 700 and a covering area 900, and the pattern layer 400 is not attached to the first color layer 100. The visible light transmittance of the graphic area 700 is greater than that of the covering area 900. The first color layer 100 is directly connected to the first adhesive layer 800.

[0015] In one embodiment, the multi-layer light-transmitting material of the present invention further comprises one or more of the following: (a) a second color layer 101, the second color layer 101 is directly connected to the first color layer 100, and the first color layer 100 is attached to the second color layer 101 by screen printing or UV printing process; (b) a soft layer 200 and a second adhesive layer 801, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801; (c) a reflective layer 300; and (d) a film layer 500. In the present invention, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801. In one embodiment, the pattern layer 400 is attached to the skeleton layer 600. In another embodiment, the pattern layer 400 is attached to the film layer 500. In yet another embodiment, the pattern layer 400 is not attached to any layer.

[0016] In a second aspect, the present invention provides a method for preparing the multi-layer light-transmitting material of the first aspect.

[0017] In one embodiment, the method for preparing the multi-layer light-transmitting material of the present invention comprises:

[0018] The film is screen-printed or UV-printed to attach the pattern layer to the film to obtain a film including the pattern layer;

[0019] Performing a punching process on the film sheet including the pattern layer;

[0020] The punched film is subjected to in-mold injection molding (IML) to obtain a skeleton including a pattern layer;

[0021] The other layers are coated onto the skeleton including the pattern layer through an adhesive layer to obtain the multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer;

[0022] The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0023] In another embodiment, the method for preparing the multi-layer light-transmitting material of the present invention comprises:

[0024] The skeleton layer is obtained by injection molding;

[0025] The skeleton layer is subjected to a pad printing process or a UV printing process, and the pattern layer is attached to the skeleton layer to obtain a skeleton including the pattern layer;

[0026] The other layers are coated onto the skeleton including the pattern layer through an adhesive layer to obtain the multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer;

[0027] The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0028] In another embodiment, the method for preparing the multi-layer light-transmitting material of the present invention comprises:

[0029] The skeleton layer is obtained by injection molding;

[0030] The skeleton layer is coated and covered to obtain a fully shielded skeleton layer;

[0031] The fully shielded skeleton layer is subjected to a laser engraving process, and the pattern layer is attached to the skeleton layer to obtain a skeleton including the pattern layer;

[0032] The other layers are coated onto the skeleton including the pattern layer through an adhesive layer to obtain the multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer;

[0033] The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0034] In a third aspect, the present invention provides a vehicle trim comprising the multi-layer light-transmitting material of the first aspect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] For a more complete understanding of the present invention, reference is now made to embodiments shown in more detail in the accompanying drawings and described below by way of example of the invention, in which:

[0036] Figure 1 An embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the light-reflecting layer 300 via the first adhesive layer 800, the pattern layer 400 is located between the light-reflecting layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0037] Figure 2Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the soft layer 200 via the first adhesive layer 800, the soft layer 200 is connected to the light-reflecting layer 300 via the second adhesive layer 801, the pattern layer 400 is located between the light-reflecting layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0038] Figure 3 Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the film layer 500 through the first adhesive layer 800, the reflective layer 300 is located between the film layer 500 and the pattern layer 400, and the pattern layer 400 is attached to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0039] Figure 4 An embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the skeleton layer 600 via the first adhesive layer 800, the skeleton layer 600 is directly connected to the light-reflecting layer 300, and the pattern layer 400 is located between the light-reflecting layer 300 and the film layer 500 and attached to the film layer 500. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0040] Figure 5 Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the soft layer 200 via the first adhesive layer 800, the soft layer 200 is connected to the skeleton layer 600 via the second adhesive layer 801, the skeleton layer 600 is directly connected to the light-reflecting layer 300, and the pattern layer 400 is located between the light-reflecting layer 300 and the film layer 500 and attached to the film layer 500. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0041] Figure 6 Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the skeleton layer 600 through the first adhesive layer 800, the skeleton layer 600 is directly connected to the film layer 500, and the reflective layer 300 is located between the film layer 500 and the pattern layer 400. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0042] Figure 7 An embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the light-reflecting layer 300 via the first adhesive layer 800, and the pattern layer 400 is located between the light-reflecting layer 300 and the skeleton layer 600 and attached to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0043] Figure 8 Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the soft layer 200 via a first adhesive layer 800, the soft layer 200 is connected to the light-reflecting layer 300 via a second adhesive layer 801, and the pattern layer 400 is located between the light-reflecting layer 300 and the skeleton layer 600 and attached to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0044] Fig. 9 An embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the skeleton layer 600 through the first adhesive layer 800, and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0045] Fig.10 Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 is connected to the soft layer 200 via the first adhesive layer 800, the soft layer 200 is connected to the skeleton layer 600 via the second adhesive layer 801, and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0046] Fig.11 An embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 and the second color layer 101 are directly connected, the first color layer 100 and the light-reflecting layer 300 are connected through the first adhesive layer 800, the pattern layer 400 is located between the light-reflecting layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900.

[0047] Fig.12 Another embodiment of the multi-layer light-transmitting material of the present invention is shown, wherein the first color layer 100 and the second color layer 101 are directly connected, the first color layer 100 and the soft layer 200 are connected through the first adhesive layer 800, the soft layer 200 and the light-reflecting layer 300 are connected through the second adhesive layer 801, the pattern layer 400 is located between the light-reflecting layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. The pattern layer 400 includes a graphic area 700 and a covering area 900. DETAILED DESCRIPTION

[0048] General Definitions and Terminology

[0049] Unless otherwise indicated, all publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety.

[0050] 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 invention belongs. In the event of a conflict, the definitions provided herein shall prevail.

[0051] When quantity, concentration or other value or parameter is given as range, preferred range or preferred upper limit and lower limit or specific value, it should be understood as specifically disclosing all ranges formed by paired values ​​from any upper limit range or preferred value and any lower limit range or preferred value, regardless of whether the range is disclosed separately. Unless otherwise stated, when numerical range is quoted herein, the range refers to including its endpoints and integers and fractions within all such ranges. The scope of the present invention is not limited to the specific numerical value quoted when defining the range. For example, "85-95" covers 85, 86, 87, 88, 89, 90, 91, 92, 93, 94 and 95, and any sub-ranges consisting of any two values ​​therein, such as 86-94, 88-93 and 89-91, etc.

[0052] As used herein, the terms "about" and "approximately" when used with a numerical variable generally refer to the value of that variable and all values ​​of that variable are within the experimental error (e.g., within a 95% confidence interval for the mean) or within ±10% of the specified value, or a wider range.

[0053] As used herein, the terms "comprises," "includes," "has," "contains," or "involves," and other variations thereof herein, are inclusive or open-ended, and do not exclude other unlisted elements or method steps. It will be understood by those skilled in the art that the above terms such as "comprising" encompass the meaning of "consisting of." The expression "consisting of" excludes any element, step, or ingredient not specified. The expression "consisting essentially of" means that the scope is limited to the specified elements, steps, or ingredients, plus the optional presence of elements, steps, or ingredients that do not substantially affect the basic and novel features of the claimed subject matter. It will be understood that the expression "comprising" encompasses the expressions "consisting essentially of" and "consisting of."

[0054] As used herein, the term "and / or" encompasses both "and" and "or." For example, "A and / or B" encompasses A, B, and A+B.

[0055] As used herein, the terms "combination thereof" and "mixture thereof" refer to a multi-component combination or mixture of the elements, such as two, three, four, and up to the maximum possible multi-component combination or mixture.

[0056] As used herein, the term "one or more" or "at least one" means one, two, three, four, five, six, seven, eight, nine or more.

[0057] If the number of parts or components of the present invention is not indicated before, it means that there is no limit on the number of occurrences (or existence) of the parts or components. Therefore, it should be interpreted as including one or at least one, and the singular form of the parts or components also includes the plural number, unless the numerical value clearly represents the singular. In one embodiment, the multi-layer light-transmitting material of the present invention includes one or more color layers. For example, the multi-layer light-transmitting material of the present invention may include one color layer (first color layer), and may also include two color layers (first color layer and second color layer). In another embodiment, the multi-layer light-transmitting material of the present invention includes one or more adhesive layers. For example, the multi-layer light-transmitting material of the present invention may include one adhesive layer (first adhesive layer), and may also include two adhesive layers (first adhesive layer and second adhesive layer).

[0058] As used herein, the term "optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes both the occurrence of said event or circumstance and the non-occurrence of said event or circumstance.

[0059] When describing methods, components or steps, letters or numbers are used for the purpose of distinction only, and do not limit these methods, components or steps to be performed in the order or sequence of the identification. Those skilled in the art can make reasonable adjustments. For example, "first color layer" and "second color layer", "first adhesive layer" and "second adhesive layer" are only used for the purpose of distinction, and do not indicate that there is a sequence or order relationship between the two. The objects referred to by different identifications can be the same or different.

[0060] As used herein, the term "vehicle" may also be referred to as "transportation means", which is a general term for machinery or equipment used to transport materials, personnel, etc., including but not limited to vehicles, airplanes, ships, bicycles, trams, trains, subways, and light rails.

[0061] As used herein, the term "soft layer" refers to a structure that provides a soft texture in a multi-layer light-transmitting material. As used herein, the hardness of a material or product is determined and characterized according to the Shore method using GB / T 531.1-2008 / ISO 7619-1:2004 or ASTM D2240 standardized test procedures. In the Shore hardness test, a spring-loaded indenter made of hardened steel is used to indent the material / specimen to measure the indentation depth. Indentation depth is a measure of Shore hardness and is measured on a scale of 0 Shore hardness (2.5 mm indentation depth) to 100 Shore hardness (0 mm indentation depth). Generally, materials with a Shore hardness of 90 or less can provide a soft texture.

[0062] As used herein, the term "color layer" refers to a structural layer with a corresponding color located outside other structural layers in a multi-layer light-transmitting material, wherein the outermost color layer has a surface that can be contacted by a user.

[0063] As used herein, the term "adhesive layer" refers to a layer formed of an adhesive used to bond the layers in a multi-layer light-transmitting material. In one embodiment, the adhesive layer comprises a transparent glue material.

[0064] As used herein, the term "outer side" refers to the side of the multi-layer light-transmitting material of the present invention that is closer to the user. Figure 1 In the embodiment shown, the multi-layer light-transmitting material of the present invention can be respectively a skeleton layer 600, a film layer 500, a pattern layer 400, a reflective layer 300, a first adhesive layer 800 and a first color layer 100 from the inside to the outside, the first color layer 100 is located outside the first adhesive layer 800, the first adhesive layer 800 is located outside the reflective layer 300, the reflective layer 300 is located outside the pattern layer 400, the pattern layer 400 is located outside the film layer 500, and the film layer 500 is located outside the skeleton layer 600. Vice versa, for example, the skeleton layer 600 is located inside the film layer 500, the film layer 500 is located inside the pattern layer 400, the pattern layer 400 is located inside the reflective layer 300, the reflective layer 300 is located inside the first adhesive layer 800, and the first adhesive layer 800 is located inside the first color layer 100.

[0065] As used herein, the term "attached to" refers to the direct adjacency or connection of the hierarchical structure, and the inner layer provides support for the outer layer. For example, the pattern layer is attached to the membrane layer, which means that the pattern layer is directly connected to the membrane layer, the membrane layer is located on the inner side of the pattern layer, and provides support for the pattern layer.

[0066] As used herein, the term "value" refers to the lightness or darkness of a color.

[0067] As used herein, the term "injection molding" refers to a method of producing shapes. Products are usually produced using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. Usually, an injection molding machine is used to make plastic products of various shapes from thermoplastics or thermosetting materials using plastic molding molds. The term "single-color injection molding" refers to a process that uses only one color of injection molding material to produce a single-color product in one injection molding process. The term "two-color injection molding" refers to a process that allows two different colors of injection molding materials and / or different injection molding materials to be combined in one injection molding process to produce products with a two-color effect.

[0068] As used herein, the term "3D mesh", which may also be referred to as "three-dimensional mesh fabric", "sandwich mesh fabric" or "3D spacer fabric", is a pure fabric material with good elasticity and support.

[0069] As used herein, the term "positional accuracy" refers to the positional relationship of one or more dimensional elements relative to another dimensional element, one or more benchmarks, which defines the area (tolerance zone) where the center point, axis or center plane of the dimensional element is allowed to deviate from the theoretical position. In this article, pattern positional accuracy represents the degree of matching between the position of the graphic area in the multi-layer light-transmitting material of the present invention and the position where it is expected to exist.

[0070] As used herein, the term "TPO" refers to thermoplastic polyolefin elastomer (TPO). TPO materials are generally composed of rubber (e.g., ethylene propylene diene monomer rubber EPDM) and polyolefin (e.g., polypropylene PP), and are prepared by different production processes (e.g., mechanical blending, reactor synthesis, and dynamic full vulcanization, etc.).

[0071] As used herein, the term "TPU" refers to thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, which is a (AB) n A block linear polymer, A is a polyester or polyether with a high molecular weight (1000-6000), B is a diol containing 2-12 straight-chain carbon atoms, and the chemical structure between the AB segments is diisocyanate. Thermoplastic polyurethane rubber is cross-linked by intermolecular hydrogen bonds or light cross-linking between macromolecular chains. These two cross-linking structures are reversible as the temperature rises or falls. The plasticity and high polarity of thermoplastic polyurethane elastomers allow the use of different processing methods commonly used in the plastic processing industry, including mixing, banburying, calendering, extrusion, molding (injection, compression, transfer, centrifugal (powder), blow molding) and solution processing. The outstanding advantage of thermoplastic polyurethane elastomers is that they can be processed into elastomer products without curing (cross-linking), so that the scraps generated by thermoplastic polyurethane elastomers in the product manufacturing process can be reused.

[0072] As used herein, the term "PC" refers to polycarbonate, which is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types.

[0073] As used herein, the term "PU" refers to polyurethane, also known as polyurethane, which is a polymer compound. Polyurethanes are classified into two categories: polyester and polyether. They can be made into polyurethane plastics (mainly foam plastics), polyurethane fibers, polyurethane rubbers and elastomers.

[0074] As used herein, the term "screen printing" refers to a stencil printing technique that achieves pattern replication by making pores in the screen that allow ink to pass through the image area and sealing the non-image area.

[0075] As used herein, the term "pad printing" refers to a printing method that uses a silicone head to transfer ink from an etched gravure to the surface of an object to be printed, which can realize printing of text, graphics and images on the surface of irregular shaped objects.

[0076] As used herein, the term "UV printing" refers to a highly efficient printing process utilizing ultraviolet light-curing inks by using special ultraviolet light-sensitive inks that are rapidly cured by ultraviolet light exposure immediately after printing.

[0077] As used in this article, the term "laser carving", also known as laser engraving or laser marking, refers to the use of a high-energy laser beam to irradiate the surface of a material, instantly converting light energy into heat energy, causing the surface material to instantly melt or even vaporize, thereby forming a precise mark.

[0078] As used herein, the term "in-mold molding (IML)" refers to placing a film sheet with pre-printed patterns or texts into an injection mold, and then injecting molten resin to combine the sheet with the resin to form a whole, thereby obtaining a product with a decorative effect. This process allows the surface patterns and texts of the product to be maintained for a long time and are not easy to wear and fade.

[0079] Multi-layer light-transmitting materials for vehicle trim

[0080] In one aspect, the present invention provides a multi-layer light-transmitting material for a vehicle trim, comprising:

[0081] A first color layer 100; a first adhesive layer 800; a pattern layer 400; and a skeleton layer 600; wherein the pattern layer 400 includes a graphic area 700 and a covering area 900, and the pattern layer 400 is not attached to the first color layer 100, and the graphic area 700 has a visible light transmittance greater than that of the covering area 900; the first color layer 100 is directly connected to the first adhesive layer 800.

[0082] In some embodiments, the multi-layer light-transmitting material of the present invention further includes one or more of the following: (a) a second color layer 101, the second color layer 101 is directly connected to the first color layer 100, and the first color layer 100 is attached to the second color layer 101 by screen printing or UV printing process; (b) a soft layer 200 and a second adhesive layer 801, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801; (c) a reflective layer 300; and (d) a film layer 500.

[0083] The multi-layer light-transmitting material of the present invention can achieve precise pattern positioning by combining specific layers and selecting materials for each layer, and setting the pattern layer at a specific hierarchical position. It can also reduce the requirements for the properties of the surface material (e.g., the first color layer or the second color layer), and increase the diversity of surface material selection, which is conducive to reducing production costs and conducting commercial production. The multi-layer light-transmitting material of the present invention is used for vehicle accessories, which can maintain the good light-transmitting properties of the vehicle accessories: when the light source inside the accessories is on, the decorative pattern of the accessories can be clearly displayed; it can also maintain the integrity of the accessories and the environment inside the vehicle: when the light source inside the accessories is off, the accessories and the environment inside the vehicle have a consistent look and feel, and the decorative pattern inside the accessories will not be displayed.

[0084] The multi-layer light-transmitting material of the present invention may further include a soft layer, thereby providing a soft texture and further improving the user experience.

[0085] Color Layer

[0086] The color of the multilayer light-transmitting material of the present invention is mainly determined by the color layer, and the color of the color layer can be selected according to actual needs. The color index a (red-green), index b (yellow-blue) and color saturation C of the multilayer light-transmitting material of the present invention can determine the relevant parameters of the prepared ornaments, and make the prepared ornaments maintain an integrated look and feel with the environment inside the vehicle. When one color layer cannot meet the appearance requirements, additional color layers can be further added to adjust the appearance color requirements. In one embodiment, the multilayer light-transmitting material of the present invention includes a color layer, which can be referred to as the first color layer. In another embodiment, the multilayer light-transmitting material of the present invention includes multiple color layers. For example, the multilayer light-transmitting material of the present invention includes two color layers, respectively referred to as the first color layer and the second color layer, wherein the second color layer is located on the outside of the first color layer. In one embodiment, the first color layer is directly connected to the first adhesive layer. When there are multiple color layers, the multiple color layers are directly connected without being connected through the adhesive layer. In one embodiment, the multilayer light-transmitting material of the present invention has two color layers, such as the first color layer 100 and the second color layer 101. In another embodiment, two color layers in the multi-layer light-transmitting material of the present invention are directly connected, for example, the first color layer 100 and the second color layer 101 are directly connected. When there are two color layers, the first color layer is attached to the second color layer by screen printing or UV printing process to serve as a structural layer for adjusting the appearance color of the second color layer. For example, the first color layer 100 is attached to the second color layer 101 by screen printing or UV printing process. Therefore, when the first color layer 100 and the second color layer 101 exist at the same time, the first color layer 100 is a light-transmitting material containing paint, ink or pigment. Similar to the above situation, the multi-layer light-transmitting material of the present invention can also have three, four, five, six or even more color layers, which can be determined accordingly according to color requirements and the requirements of matching with other structural layers.

[0087] The color layer of the multi-layer light-transmitting material of the present invention has light transmittance, and therefore can include a variety of suitable materials, such as light-transmitting materials and punchable opaque materials. In one embodiment, the color layer includes one or more of a light-transmitting thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a thermoplastic polyester elastomer (TPC) material, a polyvinyl chloride (PVC) material, a polyurethane (PU) material, or a fabric material. For example, the first color layer 100 or the second color layer 101 includes one or more of a light-transmitting thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a thermoplastic polyester elastomer (TPC) material, a polyvinyl chloride (PVC) material, a polyurethane (PU) material, or a fabric material. In another embodiment, the color layer includes a punchable opaque material. For example, the first color layer 100 or the second color layer 101 includes a punchable opaque material. By performing a punching process on the opaque material, the material is also light-transmitting. In the present invention, the positions of the color layer and the pattern layer processed by the punching process correspond to each other, so that the three-dimensional effect of the display pattern can be achieved. In one embodiment, the light transmittance of the color layer can be about 3-15%, such as 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, preferably about 5%. For example, the light transmittance of the first color layer 100 is about 3-15%, such as 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, preferably about 5%. When multiple color layers are included, the light transmittance of the color layer represents the total light transmittance of all color layers. For example, the total light transmittance of the first color layer 100 and the second color layer 101 is about 3-15%, for example, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, preferably about 5%.

[0088] Different from the traditional decoration process, the pattern layer of the multi-layer light-transmitting material of the present invention is not attached to the color layer (for example, the first color layer 100), and the requirements for the processing properties of the color layer are lower, making the color layer more selective. For example, materials that cannot or are not easy to directly add a pattern layer can be used as the color layer, such as fabrics, fibers, etc.

[0089] In order to make the ornaments made of the multi-layer light-transmitting material of the present invention have more sensory functionality, the surface color layer can also be selected from a light-transmitting material with or without leather grain.

[0090] Thermoplastic Polyolefin Elastomer (TPO)

[0091] Thermoplastic polyolefin elastomer is a polymer material composed of two components, rubber and polyolefin. It combines the high elasticity of rubber and the processing characteristics of plastic. It shows high elasticity at room temperature and can be plasticized and formed at high temperature.

[0092] Thermoplastic polyurethane elastomer (TPU)

[0093] Thermoplastic polyurethane elastomer is an AB type block linear polymer composed of flexible soft segments and rigid hard segments. It has excellent comprehensive properties such as high strength, high toughness, wear resistance and oil resistance, especially its wear resistance. It also has good chemical resistance, hydrolysis resistance and mildew resistance.

[0094] Thermoplastic Polyester Elastomer (TPC)

[0095] Thermoplastic polyester elastomers are a type of linear block copolymers containing PBT (polybutylene terephthalate) polyester hard segments and aliphatic polyester or polyether soft segments. They combine the good elasticity of rubber and the easy processing of thermoplastics. The hardness and softness can be adjusted by adjusting the formula. They not only have good mechanical properties such as high elasticity, fatigue resistance and wear resistance, but also show excellent mechanical properties at high temperatures. In addition, they also have excellent chemical resistance and weather resistance, allowing them to maintain stable performance in various harsh environments.

[0096] Polyvinyl chloride (PVC)

[0097] Polyvinyl chloride is a polymer formed by the polymerization of vinyl chloride monomer in the presence of initiators such as peroxides, azo compounds, or under the action of light or heat according to the free radical polymerization mechanism. It has good physical and chemical properties, such as strong acid and alkali resistance, good chemical stability, and excellent electrical insulation.

[0098] Fabric Material

[0099] The color layer of the multi-layer light-transmitting material of the present invention may also include a fabric material. The fabric material not only provides a beautiful appearance for the vehicle, but also has certain functionality, such as comfort, durability, and environmental protection. The light-transmitting fabric provides a new visual and functional experience for the vehicle.

[0100] The fabric material used for the color layer may include organic fabrics, knitted fabrics, non-woven fabrics, fiber composite materials and synthetic fibers (polyester, acrylic, nylon and polypropylene, etc.).

[0101] Adhesive layer

[0102] The material of the adhesive layer of the multilayer light-transmitting material of the present invention is not particularly limited, and can be a transparent glue material commonly used in the art. In one embodiment, the adhesive layer is a transparent glue material comprising one or more of hot melt adhesive, water-based glue or hot melt adhesive film. To meet the bonding requirements of each layer, the multilayer light-transmitting material of the present invention comprises one or more adhesive layers. In one embodiment, the multilayer light-transmitting material of the present invention comprises one adhesive layer. In another embodiment, the multilayer light-transmitting material of the present invention comprises multiple adhesive layers. For example, the multilayer light-transmitting material of the present invention may include two adhesive layers, respectively referred to as the first adhesive layer 800 and the second adhesive layer 801, wherein the first adhesive layer 800 is located outside the second adhesive layer 801. In one embodiment, the first adhesive layer 800 is a transparent glue material comprising one or more of hot melt adhesive, water-based glue or hot melt adhesive film. In another embodiment, the second adhesive layer 801 is a transparent glue material comprising one or more of hot melt adhesive, water-based glue or hot melt adhesive film. In one embodiment, the first adhesive layer 800 is directly connected to the first color layer 100. In another embodiment, the first adhesive layer 800 and the second adhesive layer 801 are directly connected to the soft layer 200. In one embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly connected to the reflective layer 300. In another embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly connected to the film layer 500. In yet another embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly connected to the skeleton layer 600. In one embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly connected to the pattern layer 400. In one embodiment, there is no adhesive layer between the pattern layer, the skeleton layer, the reflective layer and the film layer, for example, there is no first adhesive layer 800 or the second adhesive layer 801 between the pattern layer 400, the skeleton layer 600, the reflective layer 300 and the film layer 500.

[0103] As used herein, "hot melt adhesive" refers to a thermoplastic adhesive that is solid at room temperature and becomes liquid after being heated to a certain temperature. It has fluidity, can wet the surface of the adherend and shows excellent bonding ability. After cooling, the hot melt adhesive quickly forms a high-strength bond through hardening or chemical reaction. Hot melt adhesive has the characteristics of rapid curing and can achieve the required bonding strength in a short time. The main components of hot melt adhesive include main polymer, tackifier, viscosity modifier, antioxidant, etc. The main polymer is usually a thermoplastic resin, such as ethylene-vinyl acetate copolymer resin (EVA), polyamide resin (PA), polyurethane resin (PU), etc., which determine the basic properties of hot melt adhesive. Tackifiers are used to increase the fluidity of the colloid and the wettability of the adherend, and improve the bonding performance. Viscosity modifiers are used to adjust the fluidity and solidification speed of the colloid for rapid bonding. Antioxidants are used to enhance the long-term stability of hot melt adhesives and prevent oxidation reactions at high temperatures. In one embodiment, the adhesive layer includes one or more of ethylene-vinyl acetate copolymer hot melt adhesive, polyamide hot melt adhesive, polyester hot melt adhesive, thermoplastic polyurethane hot melt adhesive, polyolefin hot melt adhesive, and polyethylene hot melt adhesive. For example, the first adhesive layer 800 and / or the second adhesive layer 801 include one or more of ethylene-vinyl acetate copolymer hot melt adhesive, polyamide hot melt adhesive, polyester hot melt adhesive, thermoplastic polyurethane hot melt adhesive, polyolefin hot melt adhesive, and polyethylene hot melt adhesive.

[0104] As used herein, "water-based glue", also known as "water-based glue" or "water-soluble glue", refers to an adhesive with water as a solvent, which is mainly composed of a polymer material (usually a synthetic resin, such as acrylates, polyurethanes, vinyls, etc.) and water, and may also include additives to improve its properties. The water-based glue does not contain organic solvents, can be dissolved in water, and can be used for bonding a variety of materials, so it has the characteristics of environmental protection, safety and strong adaptability. In one embodiment, the adhesive layer includes one or more of polyurethane water-based glue, acrylate water-based glue, vinyl water-based glue, epoxy resin water-based glue, natural rubber water-based glue, and silicone water-based glue. For example, the first adhesive layer 800 and / or the second adhesive layer 801 include one or more of polyurethane water-based glue, acrylate water-based glue, vinyl water-based glue, epoxy resin water-based glue, natural rubber water-based glue, and silicone water-based glue.

[0105] Pattern layer

[0106] The pattern layer 400 includes a pattern area 700 and a cover area 900. The pattern area 700 is light-transmissive, allowing light to pass through the pattern area 700 to display a preset pattern. The visible light transmittance of the pattern area 700 is greater than that of the cover area 900, so that the pattern of the pattern area is more obvious.

[0107] In the present invention, the pattern layer is formed by adjusting the distribution of ink, paint or pigment on the transparent material through screen printing, pad printing, UV printing or laser engraving. The selected ink, paint or pigment can be adjusted according to the visual effect of the multi-layer light-transmitting material to be achieved. For example, a material mixed with light-colored ink, paint or pigment and metal powder is selected to prepare the pattern layer. Therefore, the pattern layer is a light-transmitting material containing paint, ink or pigment.

[0108] In the multi-layer light-transmitting material of the present invention, the pattern layer 400 may be attached to the film layer 500 or the skeleton layer 600, but not to the color layer. For example, the pattern layer of the present invention is not attached to the first color layer 100 or the second color layer 101. In one embodiment, the pattern layer 400 is attached to the skeleton layer 600. In another embodiment, the pattern layer 400 is attached to the film layer 500. In one embodiment, the pattern layer 400 is attached to the film layer 500 by screen printing or UV printing process. In another embodiment, the pattern layer 400 is attached to the skeleton layer 600 by pad printing process or UV printing process or laser engraving process. The pattern layer 400 may also not be attached to any layer. In the present invention, the pattern layer 400 is not attached to any layer, which means that the pattern layer 400 is the innermost structural layer among the structural layers of the multi-layer light-transmitting material of the present invention.

[0109] Skeleton layer

[0110] The material of the skeleton layer of the multi-layer light-transmitting material of the present invention is not particularly limited, and can be a skeleton material commonly used in the art. In one embodiment, the skeleton layer 600 comprises one or more of a light-transmitting thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a polycarbonate (PC) material, a polyurethane (PU) material, a polypropylene (PP) material, a polymethyl methacrylate (PMMA) material, a polystyrene (PS) material, a polyester material, and a polysulfone (PSF or PSU) material.

[0111] The skeleton layer can be formed by injection molding. In one embodiment, the skeleton layer 600 is formed by single-color injection molding or double-color injection molding. In a specific embodiment, the skeleton layer 600 is formed by in-mold injection molding (IML).

[0112] Polycarbonate (PC)

[0113] Polycarbonate, also known as PC plastic, is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. Polycarbonate has high strength and elastic modulus, high impact strength, high fatigue resistance, wide operating temperature range, and is easy to process and shape.

[0114] Polyurethane (PU)

[0115] Polyurethane is a polymer formed by chemical reaction of organic polyisocyanate and terminal hydroxyl compound, and its structure contains repeated carbamate segments. Polyurethane has high tensile strength, tear strength and good impact resistance, good corrosion resistance to many chemical substances, can remain stable in harsh environments such as acid, alkali, solvent, etc., and has good oil resistance and good biocompatibility. It can be processed by injection molding, extrusion, calendering and other processes, and can be easily formed into products of various complex shapes to meet different industrial needs.

[0116] Polypropylene (PP)

[0117] Polypropylene is a thermoplastic resin made from propylene monomers through polymerization. It is a non-toxic, odorless, tasteless, milky white, highly crystalline polymer that is particularly stable to water, has high tensile strength and hardness, excellent resistance to bending fatigue, and has good heat resistance and chemical stability.

[0118] Polymethyl methacrylate (PMMA)

[0119] Polymethyl methacrylate, also known as plexiglass or acrylic, has high transparency, excellent mechanical strength, low density, low melting point and high glass transition temperature. It can be widely used in many fields, such as construction, industrial parts, and medical fields.

[0120] Polystyrene (PS)

[0121] Polystyrene is a thermoplastic non-crystalline resin, which is polymerized from styrene monomers. It is a colorless, odorless, tasteless transparent solid with good transparency and gloss, good electrical properties and chemical stability. It is widely used in electronics, instruments, communications equipment and other fields in industry.

[0122] Polyester

[0123] Polyester is a polymer made by condensation reaction of polyols and polyacids, mainly including linear thermoplastic resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyarylate.

[0124] Polysulfone (PSF or PSU)

[0125] Polysulfone is a thermoplastic resin composed of a molecular main chain containing sulfone groups and arylene groups, which has high strength, high rigidity and good creep resistance. In addition, it also has good chemical stability, for example, stability to general acids, alkalis, and salt solutions, and good radiation resistance.

[0126] Soft layer

[0127] According to different requirements for soft touch and appearance, the multi-layer light-transmitting material of the present invention may not include a soft layer, or may further include a soft layer.

[0128] The soft layer is a material layer that mainly provides a soft touch in the multi-layer light-transmitting material of the present invention. In one embodiment, the Shore hardness of the soft layer is about 90 or less. In one embodiment, the soft layer is directly connected to the adhesive layer. For example, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801.

[0129] The material of the soft layer of the multi-layer light-transmitting material of the present invention is not particularly limited, and can be a material commonly used in the art that can provide a soft texture. In one embodiment, the soft layer 200 includes one or more of a light-transmitting 3D mesh, a fabric, a highly compressible rubber, an elastomer, a gel, and a porous foam material. For example, the soft layer 200 may include one or more of a woven fabric, a knitted fabric, a non-woven fabric, a sponge rubber, a polypropylene (PP) material, or a thermoplastic elastomer (TPE).

[0130] 3D Mesh

[0131] 3D mesh is a pure fabric material with good elasticity and support. It has excellent resilience, moisture permeability, good mechanical properties and chemical stability. It can provide cushioning protection and can be used for 3D mattresses, 3D pillows, 3D vehicle seat cushions, etc. It is in line with the international development concept of saving resources and protecting the environment.

[0132] In one embodiment, the soft layer 200 of the present invention comprises 3D mesh. The present invention can use 3D mesh as the soft layer to provide a soft touch and have various advantageous properties.

[0133] Polypropylene (PP)

[0134] Polypropylene is a thermoplastic polymer made from propylene monomers through addition polymerization. Polypropylene is stable to water, resistant to chemical corrosion, has good heat resistance, is a recyclable material, is easy to recycle, and has environmentally friendly characteristics.

[0135] In one embodiment, the soft layer 200 of the present invention comprises polypropylene. The present invention can use polypropylene as the soft layer to provide a soft touch and have various advantageous properties.

[0136] Thermoplastic Elastomer (TPE)

[0137] Thermoplastic elastomer is a material that has both rubber and plastic properties, showing the elasticity of rubber at room temperature and being able to be plasticized and formed at high temperature. Thermoplastic elastomer has good colorability, soft touch, weather resistance, fatigue resistance and temperature resistance, has excellent processing performance, and can be recycled. The thermoplastic elastomer used for the soft layer of the multi-layer light-transmitting material of the present invention is not particularly limited, and can be a thermoplastic elastomer commonly used in the art that can provide a soft texture. For example, styrene-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, polyolefin-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, urethane-based thermoplastic elastomers, organic fluorine-based thermoplastic elastomers, silicone-based thermoplastic elastomers or ethylene-based thermoplastic elastomers, etc.

[0138] In one embodiment, the soft layer 200 of the present invention includes a thermoplastic elastomer. The present invention can use a thermoplastic elastomer as the soft layer to provide a soft touch and have various advantageous properties.

[0139] Reflective layer

[0140] According to the different requirements for appearance and display effects, the multi-layer light-transmitting material of the present invention may not include a reflective layer, or may further include a reflective layer. The reflective layer is a layer with a certain light transmittance and high reflectivity. There is no particular limitation on the material used for the reflective layer of the multi-layer light-transmitting material of the present invention, and it can be a material commonly used in the art that can provide the above-mentioned effects. In one embodiment, the reflective layer 300 is a highly reflective material comprising one or more of ink, paint or pigment. In another embodiment, the transmittance of the highly reflective material is 85-95%. For example, the transmittance of the highly reflective material is about 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94% or 95%.

[0141] In order to achieve the effect of integration of the decorative parts made of the multi-layer light-transmitting material of the present invention with the vehicle environment when the internal light source is extinguished, the reflective layer can be set according to the corresponding requirements. In one embodiment, the reflective layer 300 is directly connected to the pattern layer 400. In one embodiment, the reflective layer is located between the pattern layer and other layers (such as adhesive layer, film layer or skeleton layer), which can have a certain protective effect on the pattern layer. For example, when the reflective layer 300 is located between the pattern layer 400 and the adhesive layer (the first adhesive layer 800 or the second adhesive layer 801), the adhesive of the adhesive layer can be prevented from penetrating into the pattern layer, thereby ensuring the integrity of the pattern layer 400. When the reflective layer 300 is located between the pattern layer 400 and the skeleton layer 600, the damage that may be caused to the pattern layer 400 by the IML injection molding process can be avoided, thereby ensuring the integrity of the pattern layer 400.

[0142] The integration effect of the multi-layer transparent material of the present invention can be adjusted according to the properties of the color layer, the reflective layer, and the pattern layer. For example, in the present invention, the color difference of the appearance of the decorative part made of the multi-layer transparent material of the present invention under ambient light can be tested by a Ci7800 spectrophotometer or a CM2500C colorimeter to verify the necessity of the reflective layer.

[0143] In one embodiment, when the light transmittance of the layer outside the pattern layer is low (e.g., less than 10%) and the size of the graphic area in the pattern layer is small (e.g., not greater than 1.5 mm), the multi-layer light-transmitting material of the present invention may not include a reflective layer. This is because the light transmittance outside the pattern layer is low and the size of the graphic area of ​​the pattern layer is small, resulting in the difference between the refracted light generated by the diffusely reflected light in the light-transmitting area of ​​the pattern layer and the reflected light and refracted light generated in the covering area is not obvious, so there is no need for a reflective layer to assist in adjusting the color difference, and the effect of integration can be directly achieved.

[0144] In another embodiment, when the light transmittance of the layer outside the pattern layer is low (e.g., less than 10%) and the size of the graphic area in the pattern layer is large (e.g., greater than 1.5 mm), the multi-layer light-transmitting material of the present invention includes a reflective layer. This is because the refracted light generated by the diffusely reflected light in the light-transmitting area of ​​the pattern layer is enhanced, resulting in a difference between the reflected light and the refracted light generated in the covered area, so the reflective layer is needed to assist in adjusting the color difference, thereby achieving an integrated effect.

[0145] In another embodiment, the light transmittance of the layer outside the pattern layer is relatively high (e.g., about 10-30%, specifically about 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29% or 30%), and the multi-layer light-transmitting material of the present invention includes a reflective layer. This is because the light transmittance of the layer outside the pattern layer is relatively high, resulting in obvious color difference between the light-transmitting area and the covering area of ​​the pattern layer, so the reflective layer is needed to assist in adjusting the color difference, thereby achieving the integration effect.

[0146] When the light-reflecting layer is present, the brightness of the multi-layer light-transmitting material of the present invention is determined by the color layer and the light-reflecting layer.

[0147] In the multi-layer light-transmitting material of the present invention, the relative position relationship between the reflective layer and the pattern layer is not particularly limited. For example, the reflective layer is located outside the pattern layer or inside the pattern layer.

[0148] Diaphragm layer

[0149] According to the needs of the preparation method, the multi-layer light-transmitting material of the present invention may not include a diaphragm layer, or may further include a diaphragm layer. The material of the diaphragm layer used for the multi-layer light-transmitting material of the present invention is not particularly limited, and can be a material commonly used in the art that can provide an isolation protection effect. In one embodiment, the diaphragm layer 500 includes one or more of a light-transmitting thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a polycarbonate (PC) material, a polyurethane (PU) material, a polypropylene (PP) material, a polymethyl methacrylate (PMMA) material, a polystyrene (PS) material, a polyester material, and a polysulfone (PSF or PSU) material. In one embodiment, the thickness of the diaphragm layer 500 is about 0.1-0.4mm, for example, about 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm or 0.4mm. In a preferred embodiment, the thickness of the diaphragm layer 500 is about 0.25mm.

[0150] In one embodiment, the film layer 500 can be used as a carrier layer of the pattern layer 400. In another embodiment, the film layer 500 is located between the pattern layer 400 and the skeleton layer 600.

[0151] When the diaphragm layer is located between the pattern layer and the skeleton layer, the damage to the pattern layer caused by the IML injection molding process can be avoided, thereby ensuring the integrity of the pattern layer. The presence of the diaphragm layer can also increase the chemical resistance of the pattern layer. In addition, compared with the direct connection of the pattern layer with other layers (such as adhesive layer or skeleton layer), the diaphragm layer has a more stable connection effect with other layers (such as adhesive layer or skeleton layer), so the connection with other layers (such as adhesive layer or skeleton layer) through the diaphragm layer has a higher peeling force.

[0152] In one embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the first adhesive layer 800 is directly connected to the reflective layer 300, the pattern layer 400 is located between the reflective layer 300 and the film layer 500, the film layer 500 is directly connected to the skeleton layer 600, and a second color layer 101 is optionally present, and the second color layer 101 is directly connected to the first color layer 100.

[0153] In another embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801, the second adhesive layer 801 is directly connected to the reflective layer 300, the pattern layer 400 is located between the reflective layer 300 and the film layer 500, the film layer 500 is directly connected to the skeleton layer 600, wherein the second color layer 101 is optionally present and is directly connected to the first color layer 100.

[0154] In one embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800 , the first adhesive layer 800 is directly connected to the film layer 500 , the reflective layer 300 is located between the film layer 500 and the pattern layer 400 , and the pattern layer 400 is attached to the skeleton layer 600 .

[0155] In another embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801, the second adhesive layer 801 is directly connected to the film layer 500, the reflective layer 300 is located between the film layer 500 and the pattern layer 400, and the pattern layer 400 is attached to the skeleton layer 600.

[0156] In one embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800 , the first adhesive layer 800 is directly connected to the skeleton layer 600 , the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400 , and the pattern layer 400 is attached to the film layer 500 .

[0157] In another embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801, the second adhesive layer 801 is directly connected to the skeleton layer 600, the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400, and the pattern layer 400 is attached to the film layer 500.

[0158] In one embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the first adhesive layer 800 is directly connected to the skeleton layer 600, the skeleton layer 600 is directly connected to the film layer 500, and the reflective layer 300 is located between the film layer 500 and the pattern layer 400.

[0159] In another embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801, the second adhesive layer 801 is directly connected to the skeleton layer 600, the skeleton layer 600 is directly connected to the film layer 500, and the reflective layer 300 is located between the film layer 500 and the pattern layer 400.

[0160] In one embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800 , the first adhesive layer 800 is directly connected to the reflective layer 300 , and the pattern layer 400 is located between the reflective layer 300 and the skeleton layer 600 .

[0161] In another embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801, the second adhesive layer 801 is directly connected to the reflective layer 300, and the pattern layer 400 is located between the reflective layer 300 and the skeleton layer 600.

[0162] In one embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800 , the first adhesive layer 800 is directly connected to the skeleton layer 600 , and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400 .

[0163] In another embodiment, in the multi-layer light-transmitting material of the present invention, the first color layer 100 is directly connected to the first adhesive layer 800, the soft layer 200 is directly connected to the first adhesive layer 800 and the second adhesive layer 801, the second adhesive layer 801 is directly connected to the skeleton layer 600, and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400.

[0164] Preparation method of multi-layer light-transmitting material of the present invention

[0165] First method

[0166] The present invention provides a method for preparing a multilayer light-transmitting material (also referred to herein as a "first method"), comprising:

[0167] The film is screen-printed or UV-printed to attach the pattern layer to the film to obtain a film including the pattern layer;

[0168] Performing a punching process on the film sheet including the pattern layer;

[0169] The punched film is subjected to in-mold injection molding (IML) to obtain a skeleton including a pattern layer;

[0170] Covering the skeleton including the pattern layer with other layers through an adhesive layer to obtain a multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer;

[0171] The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0172] In one embodiment, the first method further comprises: screen printing the film before in-mold insert molding (IML) so that the film further comprises a reflective layer.

[0173] In one embodiment, the first color layer is directly connected to the second color layer. For example, the first color layer 100 is directly connected to the second color layer 101. In another embodiment, the first color layer is attached to the second color layer by screen printing or UV printing process. For example, the first color layer 100 is attached to the second color layer 101 by screen printing or UV printing process.

[0174] In a specific embodiment, the first method of the present invention comprises: screen printing or UV printing on a 0.25 mm polycarbonate film, attaching a pattern layer to the film to obtain a film containing a pattern layer, and then drying and curing; after curing, further screen printing the film containing the pattern layer, introducing a reflective layer into the film containing the pattern layer, and then drying and curing; punching the above-prepared film, cutting off excess material and punching out positioning holes; placing the punched film in the positioning holes on the injection molding machine, performing IML two-color or single-color injection molding, and obtaining a skeleton containing a pattern layer after injection molding; spraying or roller gluing the skeleton containing the pattern layer and / or other layers after injection molding to form an adhesive layer, and then automatically or manually coating to obtain a multi-layer light-transmitting material; wherein the other layers include a color layer and an optional soft layer.

[0175] Second method

[0176] In another embodiment, the present invention provides a method for preparing a multilayer light-transmitting material (also referred to herein as a "second method"), comprising:

[0177] The skeleton layer is obtained by injection molding;

[0178] The skeleton layer is subjected to a pad printing process or a UV printing process, and the pattern layer is attached to the skeleton layer to obtain a skeleton including the pattern layer;

[0179] Covering the skeleton including the pattern layer with other layers through an adhesive layer to obtain a multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer;

[0180] The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0181] In one embodiment, the second method further comprises: performing screen printing before or after performing the pad printing process or the UV printing process on the skeleton layer so that the skeleton further comprises a reflective layer.

[0182] In one embodiment, the first color layer is directly connected to the second color layer. For example, the first color layer 100 is directly connected to the second color layer 101. In another embodiment, the first color layer is attached to the second color layer by screen printing or UV printing process. For example, the first color layer 100 is attached to the second color layer 101 by screen printing or UV printing process.

[0183] In a specific embodiment, the second method of the present invention includes: performing two-color or single-color injection molding to obtain a skeleton layer; performing a pad printing process or a UV printing process on the skeleton layer, attaching a pattern layer to the skeleton layer, and obtaining a skeleton containing a pattern layer; spraying or roller gluing the skeleton containing the pattern layer and / or other layers to form an adhesive layer, and then automatically or manually coating to obtain a multi-layer light-transmitting material; wherein the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0184] Third method

[0185] In yet another embodiment, the present invention provides a method for preparing a multilayer light-transmitting material (also referred to herein as the "third method"), comprising:

[0186] The skeleton layer is obtained by injection molding;

[0187] The skeleton layer is coated and covered to obtain a fully shielded skeleton layer;

[0188] The fully shielded skeleton layer is subjected to laser engraving process, and the pattern layer is attached to the skeleton layer to obtain a skeleton including the pattern layer;

[0189] Covering the skeleton including the pattern layer with other layers through an adhesive layer to obtain a multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer;

[0190] The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0191] In one embodiment, the third method further comprises: performing screen printing before or after coating and covering the skeleton layer so that the skeleton further comprises a reflective layer.

[0192] In one embodiment, the first color layer is directly connected to the second color layer. For example, the first color layer 100 is directly connected to the second color layer 101. In another embodiment, the first color layer is attached to the second color layer by screen printing or UV printing process. For example, the first color layer 100 is attached to the second color layer 101 by screen printing or UV printing process.

[0193] In a specific embodiment, the third method of the present invention includes: performing two-color or single-color injection molding to obtain a skeleton layer; coating and covering the skeleton layer, and covering the skeleton by spray painting or other processes to obtain a fully shielded skeleton; performing a laser engraving process on the fully shielded skeleton layer to remove part of the masking area, and attaching a pattern layer to the skeleton layer to make the laser engraved area transparent to obtain a skeleton containing a pattern layer; spraying or roller gluing the skeleton containing the pattern layer and / or other layers to form an adhesive layer, and then automatically or manually coating to obtain a multi-layer light-transmitting material; wherein the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0194] In this article, screen printing process, pad printing process, UV printing process, laser engraving process, IML injection molding process, two-color or single-color injection molding process, coating and covering, spraying or roller gluing process are all conventional process operations of technicians in this field and can be adjusted accordingly as needed.

[0195] The present invention also provides a vehicle trim comprising the multi-layer light-transmitting material of the present invention and / or the multi-layer light-transmitting material prepared by the first method and / or the second method and / or the third method provided by the present invention. In one embodiment, the present invention provides a vehicle trim comprising the multi-layer light-transmitting material of the present invention. In one embodiment, the present invention provides a vehicle trim comprising the multi-layer light-transmitting material prepared by the first method and / or the second method and / or the third method provided by the present invention. In one embodiment, the vehicle trim comprising the multi-layer light-transmitting material of the present invention and / or the multi-layer light-transmitting material prepared by the first method and / or the second method and / or the third method provided by the present invention includes: an upper decorative panel, an inlay panel, an instrument panel, a door panel, a center console, an armrest or a seat.

[0196] Beneficial Effects

[0197] The multi-layer light-transmitting material provided by the present invention can be used for vehicle trims, such as upper decorative panels, inlay panels, dashboards, door panels, center consoles, armrests or seats. The multi-layer light-transmitting material of the present invention can provide precise pattern positioning, which not only maintains the light-transmitting properties of vehicle trims, but also can clearly display the decorative pattern of the trim when the internal light source of the trim is on, and provide a sense of integration of the vehicle trim when the internal light source of the trim is off. The above-mentioned integration effect with the vehicle environment greatly enhances the user experience.

[0198] Compared with the prior art technical solution of directly processing the epidermis layer material to attach the pattern layer to the epidermis layer (corresponding to the color layer of the present application), the pattern layer in the multi-layer light-transmitting material of the present invention is not attached to the color layer (for example, the first color layer or the second color layer), which greatly reduces the property requirements of the color layer and increases the diversity of the selection of color layer materials. For example, materials that are not suitable for the processing solutions of the prior art can be selected to prepare the multi-layer light-transmitting material of the present invention. Therefore, it can adapt to the needs of various application environments and can reduce production costs, which is conducive to commercial production. At the same time, the multi-layer light-transmitting material of the present invention also improves the accuracy of the pattern position and achieves a better display effect.

[0199] In addition, the present invention also provides a method for preparing a multi-layer light-transmitting material, which can prepare a multi-layer light-transmitting material with a pattern having more precise position accuracy, is simple to operate, has good economic benefits, and is conducive to industrial production.

[0200] Example

[0201] The solution of the present invention is further described in detail below in conjunction with specific embodiments.

[0202] It should be noted that the following examples are merely examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description, and it is not necessary and impossible to exhaustively list all the embodiments here, and the obvious changes or modifications derived therefrom are still within the scope of protection created by the present invention. Unless otherwise specified, the instruments, equipment and reagents used herein are all commercially available.

[0203] Embodiment 1 The multi-layer light-transmitting material of the present invention and the first method for preparing the same

[0204] The first method: screen printing or UV printing is performed on a 0.25mm polycarbonate film, and the pattern layer is attached to the film to obtain a film containing the pattern layer, and then the film is dried and cured; after the curing is completed, the film containing the pattern layer is screen printed, and the reflective layer is introduced into the film containing the pattern layer, and then the film is dried and cured. Then the above-prepared film is punched, the excess material is cut off and the positioning holes are punched out. The punched film is placed in the positioning hole on the injection molding machine, and IML two-color or single-color injection molding is performed to obtain a skeleton containing the pattern layer after injection molding. The skeleton containing the pattern layer and / or other layers after injection molding are subjected to spraying or roller glue treatment to form an adhesive layer, and then automatically or manually coated to obtain the multi-layer light-transmitting material of the present invention. Among them, the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0205] The structure of the multilayer light-transmitting material obtained by the first method is as follows: Figure 1-6 and Figure 11-12 shown.

[0206] like Figure 1 As shown, the first color layer 100 is connected to the reflective layer 300 through the first adhesive layer 800, the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. Since the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the possible adverse effects of IML injection molding on the pattern layer 400 during the preparation process can be effectively avoided, and the integrity of the pattern layer 400 is ensured. In addition, the reflective layer 300 is located between the pattern layer 400 and the adhesive layer 800, avoiding the possible penetration of the adhesive layer 800 on the pattern layer 400, so that the pattern layer 400 is clear and complete. The first color layer 100 in this embodiment is selected from a non-perforated or non-perforated light-transmitting material.

[0207] like Figure 2 As shown, the first color layer 100 is connected to the soft layer 200 through the first adhesive layer 800, the soft layer 200 is connected to the reflective layer 300 through the second adhesive layer 801, the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. Since the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the possible adverse effects of IML injection molding on the pattern layer 400 during the preparation process can be effectively avoided, and the integrity of the pattern layer 400 is ensured. In addition, the reflective layer 300 is located between the pattern layer 400 and the second adhesive layer 801, avoiding the possible penetration of the second adhesive layer 801 on the pattern layer 400, so that the pattern layer 400 is clear and complete. The first color layer 100 in this embodiment is selected from a non-perforated or non-perforated light-transmitting material.

[0208] like Figure 3 As shown, the first color layer 100 is connected to the film layer 500 through the first adhesive layer 800, the reflective layer 300 is located between the film layer 500 and the pattern layer 400, and the pattern layer 400 is attached to the skeleton layer 600. Since the film layer 500 is located outside the pattern layer 400, the pattern layer 400 can be prevented from being affected by external pollutants, and its chemical resistance is improved. The bonding between the film layer 500 and the first color layer 100 is more stable than the bonding between the reflective layer 300 and the first color layer 100, and therefore has a higher peeling force. The first color layer 100 in this embodiment can be made of any suitable light-transmitting material conventionally used by those skilled in the art.

[0209] like Figure 4As shown, the first color layer 100 is connected to the skeleton layer 600 through the first adhesive layer 800, the skeleton layer 600 is directly connected to the reflective layer 300, and the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and attached to the film layer 500. Because the skeleton layer 600 is outside the reflective layer 300, the pattern layer 400 and the film layer 500, the outer surface of the skeleton layer 600 can have a higher flatness during injection molding, and there is no need to perform insert injection molding or double-color injection molding steps on this surface. The bonding of the skeleton layer 600 to the first color layer 100 is more stable than the bonding of the reflective layer 300 to the first color layer 100, and therefore has a higher peeling force. The film layer 500 is located inside the pattern layer 400, which can avoid the pattern layer 400 from directly contacting other substances and provide a protective effect. The first color layer 100 in this embodiment can select any suitable light-transmitting material conventionally used by those skilled in the art, particularly a soft light-transmitting material.

[0210] like Figure 5 As shown, the first color layer 100 is connected to the soft layer 200 through the first adhesive layer 800, the soft layer 200 is connected to the skeleton layer 600 through the second adhesive layer 801, the skeleton layer 600 is directly connected to the reflective layer 300, and the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and attached to the film layer 500. Since the skeleton layer 600 is outside the reflective layer 300, the pattern layer 400 and the film layer 500, the outer surface of the skeleton layer 600 can have a high flatness during injection molding, and there is no need to perform insert injection molding or two-color injection molding steps on this surface. The bonding between the skeleton layer 600 and the soft layer 200 is more stable than the bonding between the reflective layer 300 and the soft layer 200, and therefore has a higher peeling force. The film layer 500 is located inside the pattern layer 400, which can prevent the pattern layer 400 from directly contacting other substances and provide a protective effect. The first color layer 100 in this embodiment can be made of any suitable light-transmitting material conventionally used by those skilled in the art, especially a soft light-transmitting material.

[0211] like Figure 6 As shown, the first color layer 100 is connected to the skeleton layer 600 through the first adhesive layer 800, the skeleton layer 600 is directly connected to the diaphragm layer 500, and the reflective layer 300 is located between the diaphragm layer 500 and the pattern layer 400. Since the skeleton layer 600 is outside the reflective layer 300, the pattern layer 400 and the diaphragm layer 500, the outer surface of the skeleton layer 600 can have a high degree of flatness during injection molding, and there is no need to perform insert injection molding or two-color injection molding steps on this surface. The diaphragm layer 500 is located between the pattern layer 400 and the skeleton layer 600, which can effectively avoid the possible adverse effects of IML injection molding on the pattern layer 400 during the preparation process, and ensure the integrity of the pattern layer 400. The first color layer 100 in this embodiment can be selected from any suitable light-transmitting material conventionally used by those skilled in the art, especially soft light-transmitting materials.

[0212] like Fig.11 As shown, the first color layer 100 and the second color layer 101 are directly connected, the first color layer 100 is connected to the reflective layer 300 through the first adhesive layer 800, the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. Since the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the possible adverse effects of IML injection molding on the pattern layer 400 during the preparation process can be effectively avoided, and the integrity of the pattern layer 400 can be ensured. In addition, the reflective layer 300 is located between the pattern layer 400 and the first adhesive layer 800, avoiding the possible penetration of the first adhesive layer 800 on the pattern layer 400, so that the pattern layer 400 is clear and complete. This embodiment has two color layers (the first color layer 100 and the second color layer 101), and the colors of the two color layers can be adaptively adjusted according to needs, so that a multi-layer light-transmitting material with more scene adaptability can be produced.

[0213] like Fig.12 As shown, the first color layer 100 and the second color layer 101 are directly connected, the first color layer 100 and the soft layer 200 are connected through the first adhesive layer 800, the soft layer 200 and the reflective layer 300 are connected through the second adhesive layer 801, the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and attached to the film layer 500, and the film layer 500 is directly connected to the skeleton layer 600. Since the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the possible adverse effects of IML injection molding on the pattern layer 400 during the preparation process can be effectively avoided, and the integrity of the pattern layer 400 is ensured. In addition, the reflective layer 300 is located between the pattern layer 400 and the second adhesive layer 801, which avoids the possible penetration of the second adhesive layer 801 on the pattern layer 400, so that the pattern layer 400 is clear and complete. This embodiment has two color layers (a first color layer 100 and a second color layer 101 ). The colors of the two color layers can be adaptively adjusted as needed to produce a multi-layer light-transmitting material with more scene adaptability.

[0214] Example 2 Multilayer light-transmitting material of the present invention and the second and third methods for preparing the same

[0215] The second method: perform two-color or single-color injection molding to obtain a skeleton layer. Perform pad printing or UV printing on the skeleton layer, attach the pattern layer to the skeleton layer, and obtain a skeleton containing the pattern layer. Perform glue spraying or roller glue treatment on the skeleton containing the pattern layer and / or other layers to form an adhesive layer, and then perform automatic or manual coating to obtain a multi-layer light-transmitting material. Among them, the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0216] The third method: perform two-color or single-color injection molding to obtain a skeleton layer. The skeleton layer is coated and covered, and the skeleton is covered by spray painting or other processes to obtain a fully shielded skeleton. The fully shielded skeleton layer is subjected to a laser engraving process to remove part of the covered area, and the pattern layer is attached to the skeleton layer, so that the laser engraved area is transparent, and a skeleton containing a pattern layer is obtained. The skeleton containing the pattern layer and / or other layers are subjected to spraying or roller gluing to form an adhesive layer, and then automatically or manually coated to obtain a multi-layer light-transmitting material. Among them, the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

[0217] The structure of the multilayer light-transmitting material obtained by the second method or the third method is as follows: Figure 7-10 shown.

[0218] like Figure 7 As shown, the first color layer 100 is connected to the reflective layer 300 through the first adhesive layer 800, and the pattern layer 400 is located between the reflective layer 300 and the skeleton layer 600 and attached to the skeleton layer 600. Since the skeleton layer 600 is directly processed and there is no need to prepare a film layer, the process is shortened, the production efficiency is improved, and a more accurate pattern position can be achieved. The first color layer 100 in this embodiment is made of a non-perforated or non-perforated light-transmitting material.

[0219] like Figure 8 As shown, the first color layer 100 is connected to the soft layer 200 through the first adhesive layer 800, the soft layer 200 is connected to the reflective layer 300 through the second adhesive layer 801, and the pattern layer 400 is located between the reflective layer 300 and the skeleton layer 600 and attached to the skeleton layer 600. Since the skeleton layer 600 is directly processed and there is no need to prepare a film layer, the process is shorter, the production efficiency is improved, and a more accurate pattern position can be achieved. The first color layer in this embodiment is selected from a non-perforated or non-perforated light-transmitting material.

[0220] like Fig. 9 As shown, the first color layer 100 is connected to the skeleton layer 600 through the first adhesive layer 800, and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400. Since the skeleton layer 600 is directly processed and there is no need to prepare a film layer, a shorter process is provided, production efficiency is improved, and a more accurate pattern position can be achieved. The bonding between the skeleton layer 600 and the first color layer 100 is more stable than the bonding between the reflective layer 300 and the first color layer 100, and therefore has a higher peeling force. The first color layer 100 in this embodiment can be made of any suitable light-transmitting material conventionally used by those skilled in the art, particularly a soft light-transmitting material.

[0221] like Fig.10As shown, the first color layer 100 is connected to the soft layer 200 through the first adhesive layer 800, the soft layer 200 is connected to the skeleton layer 600 through the second adhesive layer 801, and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400. The bonding between the skeleton layer 600 and the soft layer 200 is more stable than the bonding between the reflective layer 300 and the soft layer 200, and thus has a higher peeling force. The first color layer 100 in this embodiment can be made of any suitable light-transmitting material conventionally used by those skilled in the art, especially a soft light-transmitting material.

[0222] Example 3: The integration effect of the decorative part made of the multi-layer light-transmitting material of the present invention

[0223] The multi-layer light-transmitting materials in Example 1 and Example 2 are used to prepare decorative parts of different colors, and the color difference of the appearance of the decorative parts prepared by the multi-layer light-transmitting materials of the present invention under ambient light is tested by a Ci7800 spectrophotometer or a CM2500C colorimeter. The test results are shown in the following table:

[0224] Accessories Color Delta L* Delta a* Delta b* Black <0.35 <0.25 <0.25 Gray <0.45 <0.25 <0.25 Beige <0.45 <0.25 <0.35 Red <0.35 <0.35 <0.25

[0225] According to the results in the above table, the decorative parts made of the multi-layer light-transmitting material of the present invention exhibit extremely low color difference in different color systems, achieving excellent integration with the original material. This shows that the multi-layer light-transmitting material of the present invention can effectively maintain the color consistency and aesthetics of the decorative parts, and achieve a highly integrated effect visually.

[0226] It will be clear to those skilled in the art that many modifications and variations of the present invention may be made without departing from its spirit and scope. The specific embodiments described herein are provided only by way of example and are not intended to be limited in any way. The true scope and spirit of the present invention are shown by the appended claims, and the description and examples are merely exemplary.

Claims

1. A multi-layer light-transmitting material for a vehicle trim, comprising: A first color layer (100); A first adhesive layer (800); Pattern layer (400); and Skeleton layer (600); in, The pattern layer (400) comprises a graphic area (700) and a covering area (900), and the pattern layer is not attached to the first color layer (100), and the visible light transmittance of the graphic area (700) is greater than that of the covering area (900); The first color layer (100) is directly connected to the first adhesive layer (800).

2. The multi-layer light-transmitting material according to claim 1, further comprising one or more of the following: (a) a second color layer (101), the second color layer (101) is directly connected to the first color layer (100), and the first color layer (100) is attached to the second color layer (101) by screen printing or UV printing process; (b) a soft layer (200) and a second adhesive layer (801), wherein the soft layer (200) is directly connected to the first adhesive layer (800) and the second adhesive layer (801); (c) a light reflecting layer (300); and (d) Membrane layer (500).

3. The multi-layer light-transmitting material according to claim 2, wherein: The pattern layer (400) is attached to the skeleton layer (600); or The pattern layer (400) is attached to the membrane layer (500); or The pattern layer (400) is not attached to any layer.

4. The multi-layer light-transmitting material according to claim 2, wherein: (a) the first adhesive layer (800) or the second adhesive layer (801) is directly connected to the reflective layer (300); or The first adhesive layer (800) or the second adhesive layer (801) is directly connected to the membrane layer (500); or The first adhesive layer (800) or the second adhesive layer (801) is directly connected to the skeleton layer (600); or The first adhesive layer (800) or the second adhesive layer (801) is directly connected to the pattern layer (400); and / or (b) the reflective layer (300) is directly connected to the pattern layer (400); and / or (c) There is no first adhesive layer (800) or second adhesive layer (801) between the pattern layer (400), the skeleton layer (600), the reflective layer (300) and the film layer (500).

5. The multi-layer light-transmitting material according to claim 4, wherein: (1) The first adhesive layer (800) or the second adhesive layer (801) is directly connected to the reflective layer (300), the pattern layer (400) is located between the reflective layer (300) and the film layer (500), the film layer (500) is directly connected to the skeleton layer (600), and a second color layer (101) is optionally present; or (2) the first adhesive layer (800) or the second adhesive layer (801) is directly connected to the film layer (500), the reflective layer (300) is located between the film layer (500) and the pattern layer (400), and the pattern layer (400) is attached to the skeleton layer (600); or (3) the first adhesive layer (800) or the second adhesive layer (801) is directly connected to the skeleton layer (600), the reflective layer (300) is located between the skeleton layer (600) and the pattern layer (400), and the pattern layer (400) is attached to the film layer (500); or (4) the first adhesive layer (800) or the second adhesive layer (801) is directly connected to the skeleton layer (600), the skeleton layer (600) is directly connected to the film layer (500), and the reflective layer (300) is located between the film layer (500) and the pattern layer (400); or (5) The first adhesive layer (800) or the second adhesive layer (801) is directly connected to the light-reflecting layer (300), and the pattern layer (400) is located between the light-reflecting layer (300) and the skeleton layer (600); or (6) The first adhesive layer (800) or the second adhesive layer (801) is directly connected to the skeleton layer (600), and the reflective layer (300) is located between the skeleton layer (600) and the pattern layer (400).

6. The multi-layer light-transmitting material according to claim 2, wherein: The first color layer (100) or the second color layer (101) comprises one or more of a light-transmitting thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a thermoplastic polyester elastomer (TPC) material, a polyvinyl chloride (PVC) material, a polyurethane (PU) material or a fabric material; or comprises a punchable light-impermeable material; when the first color layer (100) and the second color layer (101) exist at the same time, the first color layer (100) is a light-transmitting material comprising paint, ink or pigment; and / or The first adhesive layer (800) and / or the second adhesive layer (801) are transparent adhesive materials including one or more of hot melt adhesive, water-based adhesive or hot melt adhesive film; and / or The pattern layer (400) is a light-transmitting material including paint, ink or pigment; and / or The skeleton layer (600) comprises one or more of a light-transmissive thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a polycarbonate (PC) material, a polyurethane (PU) material, a polypropylene (PP) material, a polymethyl methacrylate (PMMA) material, a polystyrene (PS) material, a polyester material, and a polysulfone (PSF or PSU) material; and / or The soft layer (200) comprises one or more of a light-transmissive 3D mesh, fabric, highly compressible rubber, elastomer, gel, and porous foam material; and / or The reflective layer (300) is a highly reflective material comprising one or more of ink, paint or pigment, and the light transmittance of the highly reflective material is 85-95%; and / or The membrane layer (500) comprises one or more of a light-transmissive thermoplastic polyolefin elastomer (TPO) material, a thermoplastic polyurethane elastomer (TPU) material, a polycarbonate (PC) material, a polyurethane (PU) material, a polypropylene (PP) material, a polymethyl methacrylate (PMMA) material, a polystyrene (PS) material, a polyester material, and a polysulfone (PSF or PSU) material.

7. The multi-layer light-transmitting material according to claim 3, wherein: The pattern layer (400) is attached to the film layer (500) by screen printing or UV printing process; or The pattern layer (400) is attached to the skeleton layer (600) by pad printing, UV printing or laser engraving.

8. A method for preparing the multilayer light-transmitting material according to any one of claims 1 to 7, comprising: The film is screen-printed or UV-printed to attach the pattern layer to the film to obtain a film including the pattern layer; Performing a punching process on the film sheet including the pattern layer; The punched film is subjected to in-mold injection molding (IML) to obtain a skeleton including a pattern layer; The other layers are coated onto the skeleton including the pattern layer through an adhesive layer to obtain the multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer; Wherein, the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer; or The skeleton layer is obtained by injection molding; The skeleton layer is subjected to a pad printing process or a UV printing process, and the pattern layer is attached to the skeleton layer to obtain a skeleton including the pattern layer; The other layers are coated onto the skeleton including the pattern layer through an adhesive layer to obtain the multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer; Wherein, the other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer; or The skeleton layer is obtained by injection molding; The skeleton layer is coated and covered to obtain a fully shielded skeleton layer; The fully shielded skeleton layer is subjected to a laser engraving process, and the pattern layer is attached to the skeleton layer to obtain a skeleton including the pattern layer; The other layers are coated onto the skeleton including the pattern layer through an adhesive layer to obtain the multi-layer light-transmitting material, wherein the adhesive layer includes a first adhesive layer and an optional second adhesive layer; The other layers include a color layer and an optional soft layer, and the color layer includes a first color layer and an optional second color layer.

9. The method of claim 8, further comprising: Screen printing the film before the in-mold insert is injected so that the film further includes a reflective layer; or Screen printing is performed before or after the frame layer is subjected to a pad printing process or a UV printing process so that the frame further comprises a reflective layer; or Screen printing is performed before or after the skeleton layer is coated and covered so that the skeleton further includes a reflective layer.

10. A carrier decoration, comprising the multi-layer light-transmitting material according to any one of claims 1 to 7, preferably, the carrier decoration comprises: Upper trim, inlays, instrument panel, door panels, center console, armrests or seats.

Images