Multilayer light-transmissive material and preparation method therefor

Abstract

The present invention relates to a multilayer light-transmissive material for a vehicle trim and a preparation method therefor. The multilayer light-transmissive material of the present invention comprises a first color layer (100); a first adhesive layer (800); a pattern layer (400); and a skeleton layer (600). 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). The visible light transmittance of the pattern area is greater than that of the covering area. The first color layer (100) is directly connected to the first adhesive layer (800). The multilayer light-transmissive material of the present invention can be used for the vehicle trim, provides a precise position of a pattern, maintains the light-transmissive properties of the vehicle trim, clearly displays a decorative pattern of the trim when a light source in the trim is turned on, provides an integral appearance of the vehicle trim when the light source in the trim is turned off, and has wide adaptability to raw material selection of skin materials, thereby being conducive to reducing production costs and facilitating commercial production.

Description

A multilayer light-transmitting material and its preparation method Technical Field

[0001] This invention relates to a multilayer translucent material for vehicle trim. Specifically, this invention relates to a multilayer translucent material comprising a first color layer, a first adhesive layer, a pattern layer, and a skeleton layer, a method for preparing the material, and its use in vehicle trim. Background Technology

[0002] With the rapid development of the transportation sector, vehicles have become essential modes of transport. In addition to higher demands for vehicle drivability and safety, vehicle consumers are also increasingly demanding improvements in the in-vehicle environment. As a crucial component of the in-vehicle environment, the shape and function of the interior interior play a significant role in enhancing the user experience.

[0003] For vehicle interiors, a unified interior environment, precise interior patterns, and soft-touch materials can provide users with a comfortable riding experience. Traditional methods for achieving translucent interior surfaces and corresponding patterns typically involve directly processing the surface material, such as drilling, laser engraving, or chemical etching, to create the translucent effect.

[0004] CN102198749B discloses a structure with a light-emitting visual effect, which is formed from PU resin containing a certain solid content.

[0005] CN115179608B discloses a translucent interior fabric for vehicles, providing a soft, elastic feel and light transmission.

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

[0007] The aforementioned existing technologies all involve the direct processing of the epidermal material, which usually results in insufficient pattern positioning accuracy, high requirements for the selection of epidermal materials, and lack of broad adaptability to various environments. Summary of the Invention

[0008] To address the aforementioned shortcomings in the prior art, the present invention provides a multilayer light-transmitting material for a vehicle.

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

[0010] First color layer 100;

[0011] 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 masking 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 masking area 900. The first color layer 100 is directly connected to the first adhesive layer 800.

[0015] In one embodiment, the multilayer 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 being directly connected to the first color layer 100, the first color layer 100 being attached to the second color layer 101 by screen printing or UV printing; (b) a flexible layer 200 and a second adhesive layer 801, the flexible layer 200 being 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 flexible 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] Secondly, the present invention provides a method for preparing the multilayer light-transmitting material of the first aspect.

[0017] In one embodiment, the method for preparing the multilayer transparent material of the present invention includes:

[0018] The film is screen-printed or UV-printed to attach the pattern layer to the film, thus obtaining a film containing the pattern layer.

[0019] The film containing the patterned layer is subjected to a punching process;

[0020] The punched film is then subjected to in-mold injection molding (IML) to obtain a skeleton containing a patterned layer.

[0021] Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain the multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

[0023] In another embodiment, the method for preparing the multilayer light-transmitting material of the present invention includes:

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

[0025] The skeleton layer is subjected to pad printing or UV printing to attach the pattern layer onto the skeleton layer, thus obtaining a skeleton containing the pattern layer.

[0026] Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain the multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

[0028] In yet another embodiment, the method for preparing the multilayer light-transmitting material of the present invention includes:

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

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

[0031] The fully masked skeleton layer is laser-engraved to attach the pattern layer onto the skeleton layer, resulting in a skeleton containing the pattern layer.

[0032] Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain the multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

[0034] Thirdly, the present invention provides a vehicle trim that includes a multilayer light-transmitting material according to the first aspect of the present invention. Attached Figure Description

[0035] To gain a more complete understanding of the invention, reference is now made to embodiments shown in more detail in the accompanying drawings and described below by way of examples of the invention, wherein:

[0036] Figure 1 illustrates one embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 is connected to the reflective layer 300 via the first adhesive layer 800, the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and is 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 patterned area 700 and a covering area 900.

[0037] Figure 2 illustrates another embodiment of the multilayer light-transmitting material of the present invention, 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 reflective layer 300 via a second adhesive layer 801, the pattern layer 400 is located between the reflective layer 300 and the film layer 500 and is 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 patterned area 700 and a covering area 900.

[0038] Figure 3 illustrates another embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 and the film layer 500 are connected by 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 patterned area 700 and a covering area 900.

[0039] Figure 4 illustrates one embodiment of the multilayer light-transmitting material of the present invention, 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 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. The pattern layer 400 includes a patterned area 700 and a covering area 900.

[0040] Figure 5 illustrates another embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 and the soft layer 200 are connected by a first adhesive layer 800, the soft layer 200 is connected to the skeleton layer 600 by a 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. The pattern layer 400 includes a patterned area 700 and a covering area 900.

[0041] Figure 6 illustrates another embodiment of the multilayer light-transmitting material of the present invention, 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 patterned area 700 and a covering area 900.

[0042] Figure 7 illustrates one embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 and the reflective layer 300 are connected by a first adhesive layer 800, and the pattern layer 400 is located between the reflective layer 300 and the skeleton layer 600 and is attached to the skeleton layer 600. The pattern layer 400 includes a patterned area 700 and a covering area 900.

[0043] Figure 8 illustrates another embodiment of the multilayer light-transmitting material of the present invention, 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 reflective layer 300 via a 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. The pattern layer 400 includes a patterned area 700 and a covering area 900.

[0044] Figure 9 illustrates one embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 is connected to the skeleton layer 600 via 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 patterned area 700 and a covering area 900.

[0045] Figure 10 illustrates another embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 and the soft layer 200 are connected by a first adhesive layer 800, the soft layer 200 is connected to the skeleton layer 600 by a 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 patterned area 700 and a covering area 900.

[0046] Figure 11 illustrates one embodiment of the multilayer light-transmitting material of the present invention, wherein 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 is 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 patterned area 700 and a covering area 900.

[0047] Figure 12 illustrates another embodiment of the multilayer light-transmitting material of the present invention, wherein the first color layer 100 and the second color layer 101 are directly connected, 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 is 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 patterned area 700 and a covering area 900. Detailed Implementation

[0048] General definitions and terms

[0049] Unless otherwise stated, all publications, patent applications, patents and other references mentioned herein are incorporated herein in their entirety by way of citation.

[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 pertains. In case of any conflict, the definitions provided herein shall prevail.

[0051] When a quantity, concentration, or other value or parameter is given as a range, preferred range, or preferred upper and lower limits, or a specific value, it should be understood as specifically disclosing all ranges formed by pairs of values ​​from any upper or preferred range and any lower or preferred range, regardless of whether the range is disclosed individually. Unless otherwise stated, when a numerical range is referred to herein, the range means including its endpoints and all integers and fractions within that range. The scope of this invention is not limited to the specific numerical value referenced when defining the range. For example, "85-95" encompasses 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, and 95, and any subrange consisting of any two of these values, such as 86-94, 88-93, and 89-91, etc.

[0052] As used herein, the terms “about” or “approximately” when used with a numerical variable generally mean that the value of the variable and all values ​​of the 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 “comprising,” “including,” “having,” “containing,” or “involving,” and their other variations thereof, are inclusive or open-ended and do not exclude other unlisted elements or method steps. Those skilled in the art will understand that the foregoing terms such as “comprising” encompass the meaning of “consisting of.” The expression “consisting of” excludes any unspecified elements, steps, or ingredients. The expression “substantially constitutes” limits the scope to the specified elements, steps, or ingredients, plus optional elements, steps, or ingredients that do not materially affect the essential and novel features of the claimed subject matter. It should be understood that the expression “comprising” encompasses both the expressions “substantially constitutes” and “consisting of.”

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

[0055] As used herein, the terms “combination of” and “mixture of” 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 terms “one or more” or “at least one” mean one, two, three, four, five, six, seven, eight, nine or more.

[0057] Where the number of components or parts of the present invention is not previously specified, it indicates that there is no limitation on the number of occurrences (or presence) of any component or part. Therefore, it should be interpreted as including one or at least one, and the singular form of a component or part also includes the plural, unless the value explicitly indicates a singular number. In one embodiment, the multilayer light-transmitting material of the present invention includes one or more color layers. For example, the multilayer light-transmitting material of the present invention may include one color layer (first color layer) or two color layers (first color layer and second color layer). In another embodiment, the multilayer light-transmitting material of the present invention includes one or more adhesive layers. For example, the multilayer light-transmitting material of the present invention may include one adhesive layer (first adhesive layer) or two adhesive layers (first adhesive layer and second adhesive layer).

[0058] As used herein, the terms “optional” or “optionally” mean that an event or situation described below may or may not occur, including both the occurrence and non-occurrence of the event or situation.

[0059] When describing methods, components, or steps, the use of letters or numbers for identification is for distinguishing purposes only and does not imply that these methods, components, or steps must be performed in the order or sequence indicated. Those skilled in the art can reasonably adjust these arrangements. For example, "first color layer" and "second color layer," "first adhesive layer" and "second adhesive layer" are used for distinguishing purposes only and do not indicate any sequential relationship between them; the different identifiers may refer to the same or different objects.

[0060] As used herein, the term "vehicle" can also be referred to as "transportation vehicle," and is a general term for machinery or equipment used to transport goods, people, etc. This includes, but is not limited to, vehicles, airplanes, ships, bicycles, trams, trains, subways, and light rail.

[0061] As used herein, the term "soft layer" refers to a structure in a multilayered translucent material that provides a soft texture. As used herein, the hardness of materials or products is determined and characterized according to the Shore method using standardized test procedures of GB / T 531.1-2008 / ISO 7619-1:2004 or ASTM D2240. In Shore hardness testing, a spring-loaded indenter made of hardened steel is used to indent the material / sample, thereby measuring the indentation depth. Indentation depth is a method of measuring Shore hardness, determined on a scale from 0 Shore hardness (2.5 mm indentation depth) to 100 Shore hardness (0 mm indentation depth). Materials with a Shore hardness below 90 typically provide a soft texture.

[0062] As used herein, the term "color layer" refers to a structural layer of a corresponding color located outside other structural layers in a multilayer translucent material, with the outermost color layer having a surface that can be touched by the user.

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

[0064] As used herein, the term "outer side" refers to the side of the multilayer light-transmitting material of the present invention that is closer to the user. For example, in the embodiment shown in FIG1, the multilayer light-transmitting material of the present invention, from the inside out, may consist of 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, wherein 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. Conversely, 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" refers to a hierarchical structure that is directly adjacent or connected, with the inner layer providing support to the outer layer. For example, a patterned layer attached to a membrane layer means that the patterned layer is directly connected to the membrane layer, with the membrane layer located inside the patterned layer and providing support to it.

[0066] As used in this article, the term "brightness" refers to the lightness or darkness of a color.

[0067] As used herein, the term "injection molding" refers to a method of producing molded products. Products are typically produced using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. Injection molding machines are typically used to mold thermoplastic or thermosetting materials into various shapes using plastic molds. The term "single-color injection molding" refers to a process that uses only one color of injection molding compound to produce a single-color product in a single injection molding process. The term "two-color injection molding" refers to a process that allows the combination of two different colors of injection molding compound and / or different injection molding compound to produce a product with a two-color effect in a single injection molding process.

[0068] As used in this article, the term "3D mesh fabric," also known 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 tolerance" refers to the positional relationship of one or more dimensional features relative to another dimensional feature, or one or more references, defining the area (tolerance zone) by which the center point, axis, or center plane of a dimensional feature is allowed to deviate from its theoretical position. In this document, pattern positional tolerance refers to the degree to which the position of a patterned area in the multilayer translucent material of this invention matches the desired location.

[0070] As used herein, the term "TPO" refers to thermoplastic polyolefin elastomer (TPO), which is typically composed of rubber (e.g., ethylene propylene diene monomer (EPDM)) and polyolefin (e.g., polypropylene (PP)) and is prepared through various production processes (e.g., mechanical blending, reactor synthesis, and dynamic full vulcanization).

[0071] As used herein, the term "TPU" refers to thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, which is an (AB) n Thermoplastic polyurethane (TPU) is a block linear polymer, where A is a high molecular weight (1000-6000) polyester or polyether, and B is a diol containing 2-12 straight-chain carbon atoms. The chemical structure between the A and B segments is a diisocyanate. TPU rubber is cross-linked by intermolecular hydrogen bonds or by slight cross-linking between macromolecular chains. These two cross-linking structures are reversible with increasing or decreasing temperature. The plasticity and high polarity of TPU elastomers allow for various processing methods commonly used in the plastics processing industry, including compounding, internal mixing, calendering, extrusion, molding (injection, compression, transfer, centrifugation (powder), blow molding), and solution processing. A significant advantage of TPU elastomers is that they can be processed into elastomer products without curing (cross-linking), allowing for the reuse of waste materials generated during product manufacturing.

[0072] As used in this article, the term "PC" refers to polycarbonate, a high molecular weight polymer containing carbonate groups in its molecular chain. Based on the structure of the ester groups, it can be classified into various types, including aliphatic, aromatic, and aliphatic-aromatic.

[0073] As used in this article, the term "PU" refers to polyurethane, also known as polyurethane, a polymer compound. Polyurethanes are broadly classified into two types: polyester and polyether. They can be used to make polyurethane plastics (mainly foamed plastics), polyurethane fibers, polyurethane rubber, and elastomers.

[0074] As used in this article, the term "screen printing" refers to a stencil printing technique that reproduces a pattern by creating a screen through which ink can pass through the image areas while the non-image areas are sealed.

[0075] As used in this article, the term "pad printing" refers to a printing method that uses a silicone pad to transfer ink from an etched gravure plate to the surface of an object to be printed, enabling the printing of text, graphics, and images on irregularly shaped objects.

[0076] As used in this article, the term "UV printing" refers to a highly efficient printing process that uses ultraviolet light to cure inks. By using special UV-sensitive inks, the inks are rapidly cured by irradiation with ultraviolet light immediately after printing.

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

[0078] As used herein, the term "in-mold insert (IML)" refers to the process of placing a pre-printed sheet of film with a design or text into an injection mold, then injecting molten resin to bond the sheet and resin together, resulting in a decorative product. This process ensures that the surface design and text on the product are durable and resistant to wear and fading.

[0079] Multi-layered translucent materials for vehicle trim

[0080] In one aspect, the present invention provides a multilayer light-transmitting material for 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 masking area 900, and the pattern layer 400 is not attached to the first color layer 100, the graphic area 700 has a visible light transmittance greater than that of the masking area 900; the first color layer 100 is directly connected to the first adhesive layer 800.

[0082] In some embodiments, the multilayer 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 being directly connected to a first color layer 100, the first color layer 100 being attached to the second color layer 101 by screen printing or UV printing; (b) a soft layer 200 and a second adhesive layer 801, the soft layer 200 being 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-layered translucent material of this invention, through a specific combination of layers and the selection of materials for each layer, allows for precise pattern placement by setting the pattern layer at specific layer levels. This reduces the requirements for the properties of the surface material (e.g., the first or second color layer), increases the diversity of surface material selection, and thus helps reduce production costs, facilitating commercial production. Using this multi-layered translucent material in vehicle trim maintains both the good translucency of the trim (clearly displaying the decorative pattern when the internal light source is on) and the integration of the trim with the vehicle's interior environment (maintaining a consistent appearance when the internal light source is off, without displaying the decorative pattern).

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

[0085] Color layer

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

[0087] The color layer of the multilayer translucent material of the present invention has light transmittance and can therefore contain a variety of suitable materials, such as translucent materials and perforated opaque materials. In one embodiment, the color layer contains one or more of a translucent 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 contains one or more of a translucent 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 contains a perforated opaque material. For example, the first color layer 100 or the second color layer 101 contains a perforated opaque material. By perforating the opaque material, the material also becomes translucent. In this invention, the positions of the perforated color layer and the pattern layer correspond to each other, achieving a three-dimensional effect for displaying the pattern. 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%, such as 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, preferably about 5%.

[0088] Unlike traditional decorative processes, the pattern layer of the multi-layer translucent material of the present invention is not attached to the color layer (e.g., the first color layer 100), which places lower requirements on the processing properties of the color layer and makes the color layer more selective. For example, materials that cannot or are not easy to directly add a pattern layer to can be used as the color layer, such as fabrics, fibers, etc.

[0089] To enable the ornaments made from the multilayer translucent material of the present invention to have more sensory functions, the surface color layer can also be selected from translucent materials with or without a leather texture.

[0090] Thermoplastic polyolefin elastomers (TPO)

[0091] Thermoplastic polyolefin elastomers are polymeric materials composed of two components: rubber and polyolefin. They combine the high elasticity of rubber with the processing characteristics of plastics, exhibiting high elasticity at room temperature and being able to be plasticized and molded at high temperatures.

[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. Its wear resistance is particularly outstanding. It also has good chemical resistance, hydrolysis resistance, and mildew resistance.

[0094] Thermoplastic polyester elastomer (TPC)

[0095] Thermoplastic polyester elastomers are a class of linear block copolymers containing PBT (polybutylene terephthalate) hard segments and aliphatic polyester or polyether soft segments. They combine the good elasticity of rubber with the easy processability of thermoplastics. Their hardness can be adjusted by modifying the formulation. They not only possess excellent mechanical properties, such as high elasticity, fatigue resistance, and abrasion resistance, but also exhibit superior mechanical properties at high temperatures. Furthermore, they possess excellent chemical resistance and weather resistance, enabling them to maintain stable performance in various harsh environments.

[0096] Polyvinyl chloride (PVC)

[0097] Polyvinyl chloride (PVC) is a polymer formed by the polymerization of vinyl chloride monomers under the action of initiators such as peroxides and azo compounds or under the action of light and heat, according to the free radical polymerization mechanism. It has good physical and chemical properties, such as strong resistance to acids and alkalis, good chemical stability, and good electrical insulation.

[0098] Fabric materials

[0099] The color layer of the multilayer translucent material of the present invention may also include fabric material. The fabric material not only provides the vehicle with an aesthetically pleasing appearance but also possesses certain functionalities, such as comfort, durability, and environmental friendliness. Translucent fabric further provides the vehicle with a new visual and functional experience.

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

[0101] adhesive layer

[0102] The material of the adhesive layer used in the multilayer light-transmitting material of the present invention is not particularly limited and can be a transparent adhesive material commonly used in the art. In one embodiment, the adhesive layer is a transparent adhesive material comprising one or more of hot melt adhesive, water-based adhesive, 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 comprise two adhesive layers, referred to as a first adhesive layer 800 and a 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 adhesive material comprising one or more of hot melt adhesive, water-based adhesive, or hot melt adhesive film. In another embodiment, the second adhesive layer 801 is a transparent adhesive material comprising one or more of hot melt adhesive, water-based adhesive, or hot melt adhesive film. In one embodiment, the first adhesive layer 800 is directly bonded to the first color layer 100. In another embodiment, the first adhesive layer 800 and the second adhesive layer 801 are directly bonded to the flexible layer 200. In one embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly bonded to the reflective layer 300. In another embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly bonded to the film layer 500. In yet another embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly bonded to the skeleton layer 600. In one embodiment, the first adhesive layer 800 or the second adhesive layer 801 is directly bonded 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 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 in this article, "hot melt adhesive" refers to thermoplastic adhesives. It is solid at room temperature and becomes liquid when heated to a certain temperature, exhibiting fluidity, the ability to wet the surfaces of adhered objects, and excellent adhesion. Hot melt adhesives rapidly form a high-strength bond upon cooling through hardening or chemical reaction. Hot melt adhesives are characterized by rapid curing, achieving the required bond strength in a short time. The main components of hot melt adhesives include the base polymer, tackifiers, viscosity modifiers, and antioxidants. The base polymer is typically a thermoplastic resin, such as ethylene-vinyl acetate copolymer (EVA), polyamide resin (PA), and polyurethane resin (PU), which determines the basic properties of the hot melt adhesive. Tackifiers improve the fluidity of the adhesive and its wettability on the adhered objects, thus improving adhesion. Viscosity modifiers adjust the fluidity and setting speed of the adhesive for rapid bonding. Antioxidants enhance the long-term stability of the hot melt adhesive and prevent oxidation reactions at high temperatures. In one embodiment, the adhesive layer comprises 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 comprises 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 adhesive," also known as "water-based glue" or "water-soluble adhesive," refers to an adhesive that uses water as a solvent. It is primarily composed of polymeric materials (usually synthetic resins, such as acrylates, polyurethanes, vinyl esters, etc.) and water, and may also include additives to improve its properties. Water-based adhesives do not contain organic solvents, are soluble in water, and can be used for bonding a variety of materials, thus possessing the characteristics of being environmentally friendly, safe, and highly adaptable. In one embodiment, the adhesive layer includes one or more of the following: polyurethane water-based adhesive, acrylate water-based adhesive, vinyl water-based adhesive, epoxy resin water-based adhesive, natural rubber water-based adhesive, and silicone water-based adhesive. For example, the first adhesive layer 800 and / or the second adhesive layer 801 include one or more of the following: polyurethane water-based adhesive, acrylate water-based adhesive, vinyl water-based adhesive, epoxy resin water-based adhesive, natural rubber water-based adhesive, and silicone water-based adhesive.

[0105] Pattern layer

[0106] The pattern layer 400 includes a pattern area 700 and a masking area 900. The pattern area 700 is light-transmitting, allowing light to pass through it to display a preset pattern. The visible light transmittance of the pattern area 700 is greater than that of the masking area 900, making the pattern in the pattern area more prominent.

[0107] In this invention, a pattern layer is formed by adjusting the distribution of inks, paints, or pigments on a transparent material through processes such as screen printing, pad printing, UV printing, or laser engraving. The selected inks, paints, or pigments can be adjusted to achieve the desired visual effect of a multi-layered translucent material. For example, a pattern layer can be prepared by mixing light-colored inks, paints, or pigments with metal powder. Therefore, the pattern layer is a translucent material containing paints, inks, or pigments.

[0108] In the multilayer 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. In another embodiment, the pattern layer 400 is attached to the skeleton layer 600 by pad printing, UV printing, or laser engraving. The pattern layer 400 may also not be attached to any layer. In the present invention, the pattern layer 400 not being attached to any layer indicates that the pattern layer 400 is the innermost structural layer of the multilayer light-transmitting material of the present invention.

[0109] Skeletal layer

[0110] The material of the skeleton layer used in the multilayer 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 the following materials: light-transmitting thermoplastic polyolefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), polycarbonate (PC), polyurethane (PU), polypropylene (PP), polymethyl methacrylate (PMMA), polystyrene (PS), polyester, and polysulfone (PSF or PSU).

[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 two-color injection molding. In a specific embodiment, the skeleton layer 600 is formed by in-mold insert injection molding (IML).

[0112] Polycarbonate (PC)

[0113] Polycarbonate, also known as PC plastic, is a high molecular polymer containing carbonate groups in its molecular chain. Based on the structure of the ester groups, it can be classified into various types such as aliphatic, aromatic, and aliphatic-aromatic. Polycarbonate possesses high strength and elastic modulus, high impact strength, high fatigue resistance, a wide operating temperature range, and is easy to process and mold.

[0114] Polyurethane (PU)

[0115] Polyurethane is a polymer formed by the chemical reaction of organic polyisocyanates and hydroxyl-terminated compounds, and its structure contains repeating urethane segments. Polyurethane possesses high tensile strength, tear strength, and good impact resistance. It exhibits excellent corrosion resistance to many chemicals, remaining stable in harsh environments such as acids, alkalis, and solvents. It also demonstrates good oil resistance and biocompatibility. It can be processed through various techniques such as injection molding, extrusion, and calendering, easily molded into products of various complex shapes to meet diverse industrial needs.

[0116] Polypropylene (PP)

[0117] Polypropylene is a thermoplastic resin produced by the polymerization reaction of propylene monomers. 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 flexural fatigue, and 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 polymerized from styrene monomers. It is a colorless, odorless, and tasteless transparent solid with good transparency and gloss, as well as excellent electrical properties and chemical stability. It is widely used in industry for electronics, electrical appliances, instruments, and communication equipment.

[0122] Polyester

[0123] Polyesters are polymers produced by polycondensation reactions of polyols and polyacids, mainly including linear thermoplastic resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyarylates.

[0124] Polysulfone (PSF or PSU)

[0125] Polysulfone is a thermoplastic resin composed of a molecular backbone containing sulfone and aryl groups. It possesses high strength, high rigidity, and good creep resistance. Furthermore, it exhibits good chemical stability, such as stability to common acids, alkalis, and salt solutions, as well as good radiation resistance.

[0126] soft layer

[0127] Depending on the requirements for a soft touch and appearance, the multilayer light-transmitting material of the present invention may or may not include a soft layer.

[0128] The soft layer is the material layer that primarily provides a soft touch in the multilayer 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 bonded to the adhesive layer. For example, the soft layer 200 is directly bonded to the first adhesive layer 800 and the second adhesive layer 801.

[0129] The material of the soft layer in the multilayer light-transmitting material used in this invention is not particularly limited and can be any material commonly used in the art that provides a soft texture. In one embodiment, the soft layer 200 comprises one or more of the following: a light-transmitting 3D mesh, fabric, highly compressible rubber, elastomer, gel, and porous foam material. For example, the soft layer 200 may comprise one or more of the following: woven fabric, knitted fabric, nonwoven fabric, sponge rubber, polypropylene (PP) material, or thermoplastic elastomer (TPE).

[0130] 3D mesh fabric

[0131] 3D mesh fabric is a pure woven material with good elasticity and support. It has excellent resilience, moisture permeability, good mechanical properties and chemical stability, and can provide cushioning and protection. It can be used in 3D mattresses, 3D pillows, 3D vehicle seat cushions, etc., which 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 a 3D mesh fabric. The present invention can use 3D mesh fabric as the soft layer to provide a soft touch while retaining its various advantageous properties.

[0133] Polypropylene (PP)

[0134] Polypropylene is a thermoplastic polymer produced by the addition polymerization of propylene monomers. Polypropylene is stable to water, resistant to chemical corrosion, has good heat resistance, is a recyclable material, is easy to recycle, and is environmentally friendly.

[0135] In one embodiment, the soft layer 200 of the present invention comprises polypropylene. The present invention uses polypropylene as the soft layer to provide a soft touch while retaining its various advantageous properties.

[0136] Thermoplastic elastomers (TPEs)

[0137] Thermoplastic elastomers are materials that combine the properties of rubber and plastic. They exhibit the elasticity of rubber at room temperature and can be plasticized and molded at high temperatures. Thermoplastic elastomers possess good colorability, a soft touch, weather resistance, fatigue resistance, and temperature resistance. They also have excellent processing performance and are recyclable. There are no particular limitations on the thermoplastic elastomer used in the soft layer of the multilayer translucent material of this invention; it can be any thermoplastic elastomer commonly used in the art that provides a soft texture. Examples include styrene-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, polyolefin-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, urethane-based thermoplastic elastomers, organofluorine-based thermoplastic elastomers, organosilicon-based thermoplastic elastomers, or ethylene-based thermoplastic elastomers, etc.

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

[0139] Reflective layer

[0140] Depending on the desired appearance and display effect, the multilayer light-transmitting material of the present invention may or may not include a reflective layer. The reflective layer is a layer with a certain light transmittance and high reflectivity. There are no particular limitations on the material of the reflective layer used in the multilayer light-transmitting material of the present invention; it can be any material commonly used in the art that provides the aforementioned effects. In one embodiment, the reflective layer 300 is a highly reflective material comprising one or more of inks, paints, or pigments. In another embodiment, the light transmittance of the highly reflective material is 85-95%. For example, the light transmittance of the highly reflective material is about 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, or 95%.

[0141] To ensure that the decorative parts made of the multilayer translucent material of this invention can achieve an effect of integration with the vehicle environment when the internal light source is turned off, a reflective layer can be provided according to appropriate requirements. In one embodiment, the reflective layer 300 is directly connected to the pattern layer 400. In another embodiment, the reflective layer is located between the pattern layer and other layers (e.g., adhesive layer, film layer, or skeleton layer), which can provide a certain degree of protection for the pattern layer. For example, when the reflective layer 300 is located between the pattern layer 400 and the adhesive layer (first adhesive layer 800 or second adhesive layer 801), it can prevent the adhesive 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, it can prevent damage to the pattern layer 400 that may be caused by the IML injection molding process, thereby ensuring the integrity of the pattern layer 400.

[0142] The integral effect of the multilayer transparent material of the present invention can be adjusted according to the properties of the color layer, reflective layer, and pattern layer. For example, in the present invention, the appearance color difference of the ornament made of the multilayer transparent material of the present invention under ambient light can be tested using a Ci7800 spectrophotometer or a CM2500C colorimeter to verify the necessity of the presence of the reflective layer.

[0143] In one embodiment, when the light transmittance of the outer layer of the pattern layer is low (e.g., less than 10%) and the size of the patterned area in the pattern layer is small (e.g., no greater than 1.5 mm), the multilayer light-transmitting material of the present invention may not include a reflective layer. This is because the low light transmittance of the outer layer of the pattern layer and the small size of the patterned area result in a negligible difference between the refracted light generated by diffuse reflection from the light-transmitting area of ​​the pattern layer and the reflected and refracted light generated by the covered area. Therefore, there is no need for a reflective layer to assist in adjusting the color difference, and a seamless effect can be directly achieved.

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

[0145] In another embodiment, the outer layer of the pattern layer has a higher light transmittance (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 multilayer light-transmitting material of the present invention includes a reflective layer. This is because the higher light transmittance of the outer layer of the pattern layer results in a significant color difference between the light-transmitting area and the covered area of ​​the pattern layer, thus requiring a reflective layer to assist in adjusting the color difference, thereby achieving a seamless effect.

[0146] When a reflective layer is present, the brightness of the multilayer light-transmitting material of the present invention is determined by both the color layer and the reflective layer.

[0147] In the multilayer light-transmitting material of the present invention, there are no particular limitations on the relative positional relationship between the reflective layer and the patterned layer. For example, the reflective layer may be located outside the patterned layer or inside the patterned layer.

[0148] membrane layer

[0149] Depending on the requirements of the preparation method, the multilayer light-transmitting material of the present invention may or may not include a film layer. The material of the film layer used in the multilayer light-transmitting material of the present invention is not particularly limited and can be any material commonly used in the art that provides isolation and protection. In one embodiment, the film layer 500 comprises one or more of the following materials: light-transmitting thermoplastic polyolefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), polycarbonate (PC), polyurethane (PU), polypropylene (PP), polymethyl methacrylate (PMMA), polystyrene (PS), polyester, and polysulfone (PSF or PSU). In one embodiment, the thickness of the film layer 500 is about 0.1-0.4 mm, for example, about 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, or 0.4 mm. In a preferred embodiment, the thickness of the film layer 500 is about 0.25 mm.

[0150] In one embodiment, the membrane layer 500 may serve as a carrier layer for the pattern layer 400. In another embodiment, the membrane layer 500 is located between the pattern layer 400 and the skeleton layer 600.

[0151] When the film layer is located between the pattern layer and the skeleton layer, it avoids potential damage to the pattern layer during the IML injection molding process, thus ensuring the integrity of the pattern layer. The presence of the film layer also increases the chemical resistance of the pattern layer. Furthermore, compared to the pattern layer being directly bonded to other layers (such as the adhesive layer or skeleton layer), the film layer provides a more robust bond with other layers (such as the adhesive layer or skeleton layer), resulting in higher peel strength when bonded to other layers (such as the adhesive layer or skeleton layer) via the film layer.

[0152] In one embodiment, in the multilayer 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 optionally a second color layer 101 is present, which is directly connected to the first color layer 100.

[0153] In another embodiment, in the multilayer 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, and the film layer 500 is directly connected to the skeleton layer 600. Optionally, a second color layer 101 is present, and the second color layer 101 is directly connected to the first color layer 100.

[0154] In one embodiment, in the multilayer 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 multilayer 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 multilayer 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 multilayer 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 multilayer 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 multilayer 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 multilayer 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 multilayer 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 multilayer 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 multilayer 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] The preparation method of the multilayer light-transmitting material of the present invention

[0165] First Method

[0166] This invention provides a method for preparing multilayer transparent materials (also referred to herein as the "first method"), comprising:

[0167] The film is screen-printed or UV-printed to attach the pattern layer to the film, thus obtaining a film containing the pattern layer.

[0168] The film containing the patterned layer is subjected to a punching process;

[0169] The punched film is then subjected to in-mold injection molding (IML) to obtain a skeleton containing a patterned layer.

[0170] Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain a multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

[0172] In one embodiment, the first method further includes screen printing the film prior to in-mold insert (IML) molding such that the film further includes a reflective layer.

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

[0174] In a specific embodiment, the first method of the present invention includes: screen printing or UV printing on a 0.25 mm polycarbonate film to attach a pattern layer to the film, obtaining a film containing the pattern layer, and then drying and curing; after curing, further screen printing is performed on the film containing the pattern layer to introduce a reflective layer into the film containing the pattern layer, and then drying and curing is performed; the film obtained above is punched to remove excess material and punch out positioning holes; the punched film is placed in the positioning holes on an injection molding machine and subjected to IML two-color or single-color injection molding to obtain an injection-molded skeleton containing the pattern layer; the injection-molded skeleton containing the pattern layer and / or other layers are treated with adhesive spraying or roller coating to form an adhesive layer, and then automatically or manually wrapped to obtain a multilayer 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 transparent material (which may also be referred to herein as the "second method"), comprising:

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

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

[0179] Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain a multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

[0181] In one embodiment, the second method further includes screen printing before or after the skeleton layer is subjected to a pad printing process or a UV printing process, such that the skeleton further includes a reflective layer.

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

[0183] In one specific embodiment, the second method of the present invention includes: performing two-color or single-color injection molding to obtain a skeleton layer; performing pad printing or UV printing on the skeleton layer to attach a pattern layer onto the skeleton layer, thereby obtaining a skeleton containing a pattern layer; performing spraying or roller coating on the skeleton containing the pattern layer and / or other layers to form an adhesive layer, and then performing automatic or manual wrapping to obtain a multilayer 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 transparent material (which may also be referred to herein as the "third method"), comprising:

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

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

[0188] The full-mask skeleton layer is laser-engraved, and the pattern layer is attached to the skeleton layer to obtain a skeleton containing the pattern layer.

[0189] Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain a multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

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

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

[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; applying a coating to the skeleton layer to cover it, and then applying a painting or other process to cover the skeleton to obtain a fully masked skeleton; performing a laser engraving process on the fully masked skeleton layer to remove part of the masked area, and attaching a pattern layer to the skeleton layer so that the laser-engraved area is transparent, thereby obtaining a skeleton containing a pattern layer; applying adhesive spraying or roller coating to the skeleton containing the pattern layer and / or other layers to form an adhesive layer, and then automatically or manually wrapping it 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, pad printing, UV printing, laser engraving, IML injection molding, two-color or single-color injection molding, coating and masking, spraying or roller coating are all routine processes for those skilled in the art and can be adjusted as needed.

[0195] The present invention also provides vehicle trim comprising the multilayer light-transmitting material of the present invention and / or the multilayer 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 vehicle trim comprising the multilayer light-transmitting material of the present invention. In one embodiment, the present invention provides vehicle trim comprising the multilayer 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 multilayer light-transmitting material of the present invention and / or the multilayer 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 trim panel, a trim panel, a dashboard, a door panel, a center console, an armrest, or a seat. Beneficial effects

[0196] The multi-layered translucent material provided by this invention can be used in vehicle trim, such as upper decorative panels, inlays, dashboards, door panels, center consoles, armrests, or seats. This multi-layered translucent material provides precise pattern positioning, maintaining the translucent nature of the vehicle trim while ensuring clear display of decorative patterns when the internal light source is illuminated, and providing a seamless appearance when the internal light source is off. This seamless integration with the vehicle environment significantly enhances the user experience.

[0197] Compared to existing technologies that directly process the epidermal material to attach the pattern layer to the epidermal layer (corresponding to the color layer of this application), the pattern layer in the multilayer translucent material of this invention is not attached to the color layer (e.g., the first color layer or the second color layer). This significantly reduces the requirements for the properties of the color layer and increases the diversity of color layer materials. For example, materials unsuitable for existing processing methods can be selected to prepare the multilayer translucent material of this invention. Therefore, it can adapt to various application environments and reduce production costs, which is beneficial for commercial production. Simultaneously, the multilayer translucent material of this invention also improves the accuracy of pattern positioning, achieving better display effects.

[0198] In addition, the present invention provides a method for preparing multilayer light-transmitting materials, which can prepare multilayer light-transmitting materials with more precise positioning patterns. The method is simple to operate, has good economic benefits, and is conducive to industrial production.

[0199] Example

[0200] The present invention will now be described in further detail with reference to specific embodiments.

[0201] It should be noted that the following embodiments are merely examples to clearly illustrate the technical solutions of the present invention, and are not intended to limit the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here, and any obvious variations or modifications derived therefrom are still within the protection scope of this invention. Unless otherwise specified, the instruments, equipment, and reagents used herein are commercially available.

[0202] Example 1: The first method for preparing the multilayer light-transmitting material of the present invention.

[0203] The first method involves screen printing or UV printing on a 0.25mm polycarbonate film to attach a pattern layer, resulting in a film containing the pattern layer. This film is then dried and cured. After curing, the film containing the pattern layer is screen printed to introduce a reflective layer, followed by drying and curing. The resulting film is then punched to remove excess material and punch out positioning holes. The punched film is placed in the positioning holes on an injection molding machine and subjected to IML two-color or single-color injection molding to obtain a molded skeleton containing the pattern layer. The molded skeleton containing the pattern layer and / or other layers are then treated with adhesive spraying or roller coating to form an adhesive layer, followed by automatic or manual wrapping to obtain the multilayer light-transmitting material of this invention. The other layers include a color layer and an optional soft layer, wherein the color layer includes a first color layer and an optional second color layer.

[0204] The structure of the multilayer light-transmitting material obtained by the first method described above is shown in Figures 1-6 and 11-12.

[0205] As shown in Figure 1, the first color layer 100 is connected to the reflective layer 300 via the first adhesive layer 800. The pattern layer 400 is located between the reflective layer 300 and the film layer 500 and is attached to the film layer 500. The film layer 500 is directly connected to the skeleton layer 600. Because the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the potential adverse effects of IML injection molding on the pattern layer 400 during the manufacturing process can be effectively avoided, ensuring the integrity of the pattern layer 400. Furthermore, the reflective layer 300 is located between the pattern layer 400 and the adhesive layer 800, preventing potential penetration of the adhesive layer 800 into the pattern layer 400, thus ensuring a clear and complete pattern layer 400. In this embodiment, the first color layer 100 is made of a non-perforated or non-porous light-transmitting material.

[0206] As shown in Figure 2, the first color layer 100 is connected to the soft layer 200 via the first adhesive layer 800, and the soft layer 200 is connected to the reflective layer 300 via the second adhesive layer 801. The pattern layer 400 is located between the reflective layer 300 and the film layer 500 and is attached to the film layer 500. The film layer 500 is directly connected to the skeleton layer 600. Because the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the potential adverse effects of IML injection molding on the pattern layer 400 during the manufacturing process can be effectively avoided, ensuring the integrity of the pattern layer 400. Furthermore, the reflective layer 300 is located between the pattern layer 400 and the second adhesive layer 801, avoiding potential penetration of the pattern layer 400 by the second adhesive layer 801, thus ensuring a clear and complete pattern layer 400. In this embodiment, the first color layer 100 is made of a non-perforated or non-porous light-transmitting material.

[0207] As shown in Figure 3, the first color layer 100 and the film layer 500 are connected by a 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, it avoids the pattern layer 400 from being affected by external contaminants, thus improving its chemical resistance. The adhesion between the film layer 500 and the first color layer 100 is more stable than the adhesion between the reflective layer 300 and the first color layer 100, thus exhibiting higher peel strength. In this embodiment, the first color layer 100 can be made of any suitable light-transmitting material conventionally used by those skilled in the art.

[0208] As shown in Figure 4, 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 reflective layer 300. The pattern layer 400 is located between the reflective layer 300 and the film layer 500 and is attached to the film layer 500. Since the skeleton layer 600 is outside the reflective layer 300, pattern layer 400, and film layer 500, its outer surface can have a high degree of flatness during injection molding, eliminating the need for insert injection molding or two-color injection molding steps on this surface. The bond between the skeleton layer 600 and the first color layer 100 is more stable than the bond between the reflective layer 300 and the first color layer 100, thus exhibiting higher peel strength. The film layer 500 is located inside the pattern layer 400, preventing direct contact between the pattern layer 400 and other substances and providing protection. In this embodiment, the first color layer 100 can be made of any suitable light-transmitting material conventionally used by those skilled in the art, particularly soft light-transmitting materials.

[0209] As shown in Figure 5, 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 reflective layer 300. The pattern layer 400 is located between the reflective layer 300 and the film layer 500 and is attached to the film layer 500. Because the skeleton layer 600 is on the outside of 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 degree of flatness during injection molding, eliminating the need for 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, thus exhibiting higher peel strength. The film layer 500 is located inside the pattern layer 400, preventing the pattern layer 400 from directly contacting other substances and providing protection. The first color layer 100 in this embodiment can be made of any suitable light-transmitting material commonly used by those skilled in the art, particularly a soft light-transmitting material.

[0210] As shown in Figure 6, 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 film layer 500, and the reflective layer 300 is located between the film layer 500 and the pattern layer 400. Since the skeleton layer 600 is located outside the reflective layer 300, the pattern layer 400, and the film layer 500, its outer surface can have a high degree of flatness during injection molding, eliminating the need for insert molding or two-color injection molding steps on this surface. The film layer 500, located between the pattern layer 400 and the skeleton layer 600, effectively avoids the potential adverse effects of IML injection molding on the pattern layer 400 during the manufacturing process, ensuring the integrity of the pattern layer 400. In this embodiment, the first color layer 100 can be any suitable light-transmitting material conventionally used by those skilled in the art, especially soft light-transmitting materials.

[0211] As shown in Figure 11, 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 is attached to the film layer 500. 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 potential adverse effects of IML injection molding on the pattern layer 400 during the manufacturing process can be effectively avoided, ensuring the integrity of the pattern layer 400. In addition, the reflective layer 300 is located between the pattern layer 400 and the first adhesive layer 800, avoiding potential penetration of the first adhesive layer 800 into the pattern layer 400, making the pattern layer 400 clear and complete. This embodiment has two color layers (first color layer 100 and second color layer 101). The colors of the two color layers can be adaptively adjusted as needed, enabling the production of multilayer light-transmitting materials with greater adaptability to various scenarios.

[0212] As shown in Figure 12, the first color layer 100 and the second color layer 101 are directly connected. The first color layer 100 is connected to the soft layer 200 through the first adhesive layer 800, and 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 is attached to the film layer 500. The film layer 500 is directly connected to the skeleton layer 600. Because the film layer 500 is located between the pattern layer 400 and the skeleton layer 600, the potential adverse effects of IML injection molding on the pattern layer 400 during the preparation process can be effectively avoided, ensuring the integrity of the pattern layer 400. In addition, the reflective layer 300 is located between the pattern layer 400 and the second adhesive layer 801, avoiding potential penetration of the second adhesive layer 801 into the pattern layer 400, making the pattern layer 400 clear and complete. This implementation scheme has two color layers (first color layer 100 and second color layer 101). The colors of the two color layers can be adjusted as needed to produce multi-layer light-transmitting materials with more scene adaptability.

[0213] Example 2: The multilayer light-transmitting material of the present invention and its second and third methods of preparation

[0214] The second method involves two-color or single-color injection molding to obtain a skeleton layer. The skeleton layer is then subjected to pad printing or UV printing to attach a pattern layer, resulting in a skeleton containing the pattern layer. The skeleton containing the pattern layer and / or other layers are then treated with adhesive spraying or roller coating to form an adhesive layer, followed by automatic or manual wrapping to obtain a multi-layered translucent material. The other layers include a color layer and an optional soft layer, wherein the color layer includes a first color layer and an optional second color layer.

[0215] The third method involves two-color or single-color injection molding to obtain a skeleton layer. The skeleton layer is then coated and masked using processes such as spray painting to create a fully masked skeleton. This fully masked skeleton layer is then laser-engraved to remove some of the masked areas, and a pattern layer is attached to the skeleton layer, making the laser-engraved areas transparent, resulting in a skeleton containing the pattern layer. The skeleton containing the pattern layer and / or other layers are then treated with adhesive spraying or roller coating to form an adhesive layer, followed by automatic or manual wrapping to obtain a multi-layered translucent material. The other layers include a color layer and an optional soft layer, wherein the color layer includes a first color layer and an optional second color layer.

[0216] The structure of the multilayer transparent material obtained by the second or third method described above is shown in Figure 7-10.

[0217] As shown in Figure 7, the first color layer 100 and the reflective layer 300 are connected by 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. Because the skeleton layer 600 is processed directly without the need to prepare a film layer, the process is shorter, production efficiency is improved, and more precise pattern positioning can be achieved. In this embodiment, the first color layer 100 is made of a non-perforated or non-porous light-transmitting material.

[0218] As shown in Figure 8, the first color layer 100 is connected to the soft layer 200 via a first adhesive layer 800, and the soft layer 200 is connected to the reflective layer 300 via a second adhesive layer 801. The pattern layer 400 is located between the reflective layer 300 and the skeleton layer 600 and is attached to the skeleton layer 600. Because the skeleton layer 600 is processed directly without the need for a film layer, the process is shorter, production efficiency is improved, and more precise pattern positioning can be achieved. In this embodiment, the first color layer is made of a non-perforated or non-porous light-transmitting material.

[0219] As shown in Figure 9, the first color layer 100 is connected to the skeleton layer 600 via a first adhesive layer 800, and the reflective layer 300 is located between the skeleton layer 600 and the pattern layer 400. Because the skeleton layer 600 is processed directly without the need for a film layer, the process is shorter, production efficiency is improved, and more precise pattern positioning 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, thus exhibiting higher peel strength. In this embodiment, the first color layer 100 can be made of any suitable light-transmitting material conventionally used by those skilled in the art, particularly soft light-transmitting materials.

[0220] As shown in Figure 10, the first color layer 100 is connected to the soft layer 200 via a first adhesive layer 800, and the soft layer 200 is connected to the skeleton layer 600 via a second adhesive layer 801. 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, thus exhibiting higher peel strength. In this embodiment, the first color layer 100 can be made of any suitable light-transmitting material conventionally used by those skilled in the art, particularly a soft light-transmitting material.

[0221] Example 3: The integral effect of the ornament made of the multilayer light-transmitting material of the present invention

[0222] The multilayer translucent materials from Examples 1 and 2 were used to prepare decorative parts of different color schemes. The color difference of the decorative parts prepared with the multilayer translucent materials of the present invention under ambient light was tested using a Ci7800 spectrophotometer or a CM2500C colorimeter. The test results are shown in the table below:

[0223] The results in the table above show that the ornaments made from the multi-layer translucent material of the present invention exhibit extremely low color difference across different color systems, achieving excellent integration with the original material. This indicates that the multi-layer translucent material of the present invention can effectively maintain the color consistency and aesthetics of the ornaments, achieving a high degree of visual fusion.

[0224] Those skilled in the art will recognize that many modifications and variations can be made to this invention without departing from its spirit and scope. The specific embodiments described herein are provided by way of example only and are not intended to limit the scope in any way. The true scope and spirit of the invention are shown in the appended claims, and the description and embodiments are merely exemplary.

Claims

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

2. The multilayer light-transmitting material according to claim 1, further comprising one or more of the following: (a) A 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) Reflective layer (300); and (d) Membrane layer (500).

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

4. The multilayer 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 patterned layer (400); and / or (c) There is no first adhesive layer (800) or second adhesive layer (801) between the pattern layer (400), skeleton layer (600), reflective layer (300) and film layer (500).

5. The multilayer 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 optionally a second color layer (101) is 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 reflective layer (300), and the pattern layer (400) is located between the reflective 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 multilayer light-transmitting material according to claim 2, wherein, The first color layer (100) or the second color layer (101) comprises one or more of the following materials: 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 perforated opaque material; when the first color layer (100) and the second color layer (101) are present simultaneously, the first color layer (100) is a light-transmitting material containing paint, ink, or pigment; and / or The first adhesive layer (800) and / or the second adhesive layer (801) are transparent adhesive materials comprising 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 containing paint, ink or pigment; and / or The skeleton layer (600) comprises one or more of the following materials: light-transmitting thermoplastic polyolefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), polycarbonate (PC), polyurethane (PU), polypropylene (PP), polymethyl methacrylate (PMMA), polystyrene (PS), polyester, and polysulfone (PSF or PSU). and / or The soft layer (200) comprises one or more of the following: a light-transmitting 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 inks, paints, or pigments, and the light transmittance of the highly reflective material is 85-95%. and / or The membrane layer (500) comprises one or more of the following materials: light-transmitting thermoplastic polyolefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), polycarbonate (PC), polyurethane (PU), polypropylene (PP), polymethyl methacrylate (PMMA), polystyrene (PS), polyester, and polysulfone (PSF or PSU).

7. The multilayer 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; 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 a multilayer transparent material according to any one of claims 1-7, comprising: The film is screen-printed or UV-printed to attach the pattern layer to the film, resulting in a film containing the pattern layer. The film containing the patterned layer is subjected to a punching process; The punched film is then subjected to in-mold injection molding (IML) to obtain a skeleton containing a patterned layer. Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain the multilayer 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, wherein the color layer includes a first color layer and an optional second color layer; or The skeleton layer is obtained through injection molding; The skeleton layer is subjected to pad printing or UV printing process to attach the pattern layer onto the skeleton layer, thus obtaining a skeleton containing the pattern layer. Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain the multilayer 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, wherein the color layer includes a first color layer and an optional second color layer; or The skeleton layer is obtained through injection molding; The skeleton layer is coated and covered to obtain a fully masked skeleton layer; The fully masked skeleton layer is laser-engraved to attach the pattern layer to the skeleton layer, thus obtaining a skeleton containing the pattern layer. Other layers are coated onto the skeleton containing the patterned layers via an adhesive layer to obtain the multilayer 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, wherein the color layer includes a first color layer and an optional second color layer.

9. The method of claim 8, further comprising: Before in-mold injection molding, the film is screen-printed to further incorporate a reflective layer; or Screen printing is performed before or after pad printing or UV printing on the skeleton layer to further incorporate a reflective layer into the skeleton; or Screen printing is performed before or after the skeleton layer is coated and masked to further incorporate a reflective layer into the skeleton.

10. An article of manufacture comprising the multilayer light-transmitting material of any one of claims 1-7, preferably, the article of manufacture comprises: Upper trim panel, applique, instrument panel, door panel, center console, armrest, or seat. Upper trim panel, applique, instrument panel, door panel, center console, armrest, or seat.

Images