Light-transmitting panel and manufacturing method thereof

Abstract

The invention relates to a light-transmitting panel piece and a manufacturing method thereof. The light-transmitting panel piece comprises a base body layer and a light-transmitting layer, wherein the base body layer is provided with a base body layer outer surface and a base body layer inner surface; the covering layer is located on one side of the outer surface of the base body layer and provided with a covering layer inner surface and a covering layer outer surface, and the covering layer inner surface at least partially covers the outer surface of the base body layer; the character icon layer is arranged on the outer surface of the covering layer or the inner surface of the base body layer and is provided with character icons; wherein the material of the base body layer comprises a light-transmitting first polymer, the material of the covering layer comprises a light-transmitting second polymer, the covering layer and the base body layer are directly connected through injection molding, and the character icon layer is arranged on the inner surface of the covering layer or the outer surface of the base body layer through in-mold insert injection molding (IML) or in-mold decoration (IMD). And the base body layer, the character icon layer and the covering layer are fixedly connected without glue.

Description

Technical Field

[0001] The present invention relates to a light-transmitting panel member and a manufacturing method thereof. Background Art

[0002] For light-transmitting panel members, such as interior parts of vehicles, such as the panels of the center console, instrument panel, door panel, etc., with the needs of users, the panels of the interior parts are required to have a display function, such as displaying characters or icons. For example, different driving mode characters can be displayed on the center console, such as the energy-saving mode, normal mode, and sports mode. Then the characters or icons can correspond to "ECO", "Normal", "Sport" respectively. For another example, control instructions of the vehicle air conditioner can be displayed, such as temperature increase, temperature decrease, and automatic temperature adjustment. Then the characters or icons can be "+", "-", and "AUTO", etc.

[0003] In a comparative solution, the structure for realizing the above panel display function can be as Figure 1 shown. The light-transmitting panel member 1000 includes a first light-transmitting layer 1001 laminated from the inner side to the outer side of the panel, made of light-transmitting polycarbonate (PC) or light-transmitting polymethyl methacrylate (PMMA), a screen-printed character and icon layer 1002, and a light-transmitting skin layer 1003, made of light-transmitting polyvinyl chloride (PVC) or polyurethane (PU). Glue 1004 is used for bonding between the first light-transmitting layer 1001 and the screen-printed character and icon layer 1002, and between the light-transmitting skin layer 1003 and the screen-printed character and icon layer 1002.

[0004] However, the inventor found that Figure 1 in the shown comparative solution, since glue bonding is required and it is necessary to ensure that the glue does not affect the clarity of the character image display, the glue needs to undergo relatively complex coating and heating processes, which are not only complex in process but also have a low yield rate.

[0005] Therefore, there is a need in the art for a light-transmitting panel member and a manufacturing method thereof to further simplify the processing technology of the light-transmitting panel and make the character images displayed on the light-transmitting panel member clearer and more accurate. Summary of the Invention

[0006] The object of the present invention is to provide a light-transmitting panel member.

[0007] The object of the present invention is also to provide a manufacturing method of a light-transmitting panel member.

[0008] A light-transmitting panel member according to the first aspect of the present invention includes: a substrate layer having an outer surface and an inner surface of the substrate layer; a covering layer located on one side of the outer surface of the substrate layer, having an inner surface and an outer surface of the covering layer, and the inner surface of the covering layer at least partially covers the outer surface of the substrate layer; a character icon layer provided on the outer surface of the covering layer or the inner surface of the substrate layer and having character icons; wherein, the material of the substrate layer includes a light-transmitting first polymer, the material of the covering layer includes a light-transmitting second polymer, the covering layer is directly connected to the substrate layer by injection molding, and the character icon layer is provided on the inner surface of the covering layer or the outer surface of the substrate layer by in-mold insert injection molding (IML) or in-mold decoration (IMD), so that the substrate layer, the character icon layer, and the covering layer are fixedly connected without glue; the light-transmitting direction of the light-transmitting panel member is from the substrate layer towards the covering layer.

[0009] For the light-transmitting panel member introduced in the above embodiments, through the structure that the substrate layer and the covering layer are directly connected by injection molding, and the character icon layer is provided on the inner surface of the covering layer or the outer surface of the substrate layer by in-mold insert injection molding or in-mold decoration, a glue-free fixed connection among the substrate layer, the character icon layer, and the covering layer is achieved, which not only simplifies the manufacturing process, but also makes the display effect of the character icons clearer and more accurate because glue bonding is not required.

[0010] In one or more embodiments of the light-transmitting panel member, the first polymer and the second polymer include the same polymerization raw materials.

[0011] In one or more embodiments of the light-transmitting panel member, the material of the covering layer includes a light-transmitting styrenic thermoplastic elastomer (TPS); the material of the substrate layer includes a light-transmitting polypropylene plastic (PP).

[0012] In one or more embodiments of the light-transmitting panel member, the material of the covering layer includes a light-transmitting styrenic thermoplastic elastomer (TPS); the material of the substrate layer includes a light-transmitting polycarbonate (PC) or a light-transmitting polymethyl methacrylate (PMMA).

[0013] In one or more embodiments of the light-transmitting panel member, the material of the covering layer is the foamed second polymer, or the thickness of the covering layer is above the critical thickness, and the character icon layer is provided on the outer surface of the covering layer.

[0014] In one or more embodiments of the light-transmitting panel member, the material of the covering layer is the non-foamed second polymer, and the thickness of the covering layer is less than the critical thickness, and the character icon layer is provided on the inner surface of the substrate layer.

[0015] In one or more embodiments of the light-transmitting panel member, a light source is further included, which is located on one side of the inner surface of the base layer, and the light-transmitting direction of the light beam provided by the light source is to pass through the base layer first and then through the covering layer.

[0016] In one or more embodiments of the light-transmitting panel member, the light-transmitting panel member is at least a part of an interior trim part of a vehicle.

[0017] A manufacturing method of a light-transmitting panel member according to a second aspect of the present invention is used to manufacture the panel member as described in the first aspect. The manufacturing method includes:

[0018] S1. Injection molding one of the base layer and the covering layer;

[0019] S2. On the base layer or the covering layer obtained in S1, injection molding the other of the base layer and the covering layer, so that the base layer and the covering layer are fixedly connected without glue;

[0020] S3. Dispose the character icon layer on the outer surface of the covering layer or the inner surface of the base layer.

[0021] In one or more embodiments of the manufacturing method, in S1 and S2, two-color injection molding is performed using the same injection molding equipment.

[0022] The beneficial effect of the manufacturing method introduced in the above embodiments is that the manufacturing process is relatively simple and the yield rate is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features, properties, and advantages of the present invention will become more obvious through the following description with reference to the drawings and embodiments, where:

[0024] Figure 1 It is a schematic structural diagram of a light-transmitting panel member of a comparative solution.

[0025] Figure 2 It is a schematic structural diagram of a vehicle with a light-transmitting panel member of an embodiment.

[0026] Figure 3 It is a schematic structural diagram of a first embodiment of the light-transmitting panel member.

[0027] Figure 4 It is a schematic structural diagram of a second embodiment of the light-transmitting panel member.

[0028] Figure 5 It is a schematic flow diagram of a manufacturing method of a light-transmitting panel member of an embodiment.

[0029] REFERENCE MARKS:

[0030] 100 - Interior trim part

[0031] 101 - Instrument panel

[0032] 102 - Door panel

[0033] 103 - Center console

[0034] 10,1000 - Translucent panel component

[0035] 1001 - First translucent layer

[0036] 1002 - Screen - printed character and icon layer

[0037] 1003 - Translucent skin layer

[0038] 1004 - Glue

[0039] 1 - Substrate layer

[0040] 11 - Outer surface of the substrate layer

[0041] 12 - Inner surface of the substrate layer

[0042] 2 - Cover layer

[0043] 21 - Inner surface of the cover layer

[0044] 22 - Outer surface of the cover layer

[0045] 3 - Character and icon layer

[0046] 31 - Characters and icons

[0047] 4 - Light source. Detailed implementation manners

[0048] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion.

[0050] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0051] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and defined, technical terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0054] The following uses a flowchart to illustrate the operations performed according to the manufacturing method of the panel member. It should be understood that, according to the actual situation, the operations before or below do not necessarily need to be precisely executed in sequence. Other operations can also be added to these processes, or one or several operations can be removed from these processes.

[0055] It should be explained that the "light transmission" recorded in the following embodiments means that it is sufficient to be able to transmit light. For an observer, the structure below this layer can be seen through the structure of this layer. For example, concepts such as transparent (light transmittance is basically 100%) and translucent in the physical sense are all within the definition scope of "light transmission" in this case.

[0056] Although the panel components disclosed in the embodiments of the present application are applicable to the interior panels of automobiles, for example, they can be interior automotive components such as door side panels, roof linings, dashboards or instrument panels, center consoles, etc. The forms of the lining components are diverse, but not limited thereto. For example, they can also be applicable to the application scenarios of other transportation means, such as railway trains, ships, and airplanes. As long as it is a transportation means, the light-transmitting panel components disclosed in the embodiments of the present application can be used to meet the needs of human-machine interaction inside the transportation means. But not limited thereto. For example, it can also be used in other scenarios, such as indoor layouts and the surfaces of fixtures. For example, scenarios such as the desktops in office places and exhibition venues, and the panels of display devices are not limited thereto. As long as the advantages of low manufacturing cost and / or clear and accurate display of character icons can be achieved by using the light-transmitting panel components of the present application to meet the needs of human-machine interaction, the light-transmitting panel components of this case are applicable.

[0057] The light-transmitting panel component 10 introduced in the following embodiments takes Figure 2 the interior component 100 shown as an example.

[0058] Referring to Figure 2 shown, taking the transportation means as an automobile for example, it includes an interior surface component 100, which can include, for example, an instrument panel 101, a door panel 102, a center console 103, etc. Currently, the instrument panel 101 and the door panel 102 generally have a split structure, and the instrument panel 101 and the door panel 102 can be clearly distinguished visually. However, it does not exclude the case where the structures of the instrument panel 101 and the door panel 102 are similar, forming a solution for the interior system of a transportation means with an integrated visual perception of the instrument panel 101 and the door panel 102. As introduced above, the light-transmitting panel component 10 can be at least a part of the interior component 100, and is used to provide character icons for the interior component 100 to provide operation buttons for the user's human-machine interaction interface. For example, different driving mode characters can be displayed on the center console, such as the energy-saving mode, the normal mode, and the sports mode. Then the characters or icons can correspond to "ECO", "Normal", "Sport" respectively. For another example, the control instructions of the vehicle air conditioner can be displayed, such as temperature increase, temperature decrease, and automatic temperature adjustment. Then the characters or icons can be "+", "-", and "AUTO", etc.

[0059] Referring to Figure 3 and Figure 4 shown, in some embodiments, the light-transmitting panel component 10 includes a substrate layer 1, a covering layer 2, and a character icon layer 3.

[0060] The substrate layer 1 has a substrate layer outer surface 11 and a substrate layer inner surface 12.

[0061] The covering layer 2 is located on one side of the outer surface 11 of the base layer, and has an inner surface 21 of the covering layer and an outer surface 22 of the covering layer. The inner surface 21 of the covering layer at least partially covers the outer surface 11 of the base layer.

[0062] The character icon layer 3 is disposed on the outer surface 22 of the covering layer or the inner surface 12 of the base layer, and has character icons. Here, the character icons are the character icons 31 provided for display by the above-described light-transmitting panel member 10, so as to provide operation buttons for the user's human-machine interaction interface.

[0063] As Figure 3 and Figure 4 shown, the light-transmitting direction of the light-transmitting panel member 10 is from the base layer 1 to the covering layer 2. In some embodiments, the light-transmitting panel member 10 may further include a light source 4, which is located on one side of the inner surface 12 of the base layer. The light-transmitting direction of the light beam provided by the light source 4 is to pass through the base layer 1 first and then through the covering layer 2. The light source 4 is generally an LED light source. It can be understood that Figure 3 、 Figure 4 the structure shown is only for illustration. The light beam reaching the light-transmitting panel member 10 may be directly emitted by the LED light source, or may be the light beam emitted by the LED light source after being transmitted through an optical waveguide, such as PC, PMMA, or optical fiber, and then reaching one side of the inner surface 12 of the base layer. That is, the light source 4 here should be interpreted broadly, and may include a separate light source member, such as an LED light source, or a combination of a light source member and an optical waveguide member.

[0064] Among them, the material of the base layer 1 includes a light-transmitting first polymer, the material of the covering layer 2 includes a light-transmitting second polymer, the covering layer 2 and the base layer 1 are directly connected by injection molding, and the character icon layer 3 is disposed on the inner surface 21 of the covering layer or the outer surface 11 of the base layer by in-mold insert molding (In Molding Label, IML) or in-mold decoration (In-Mold Decoration, IMD), so that the base layer 1, the character icon layer 3, and the covering layer 2 are fixedly connected without glue.

[0065] The fixedly connected without glue here means that the two are fixedly connected inseparably without glue. If the two are to be separated, generally a destructive method is required.

[0066] The definitions of in-mold insert injection and in-mold decoration here are similar to the common definitions in the art. That is, "in-mold insert injection" means that the surface of the character icon layer 3 is a hardened transparent film, with a printed pattern layer in the middle and a plastic layer on the back. Since the ink is sandwiched in the middle, it can prevent the surface of the product from being scratched and resist friction, and can maintain the vivid color for a long time without fading easily. "In-mold decoration" means that the character icon layer 3 is formed by placing a film with a printed pattern into a mold (such as a metal mold), injecting the resin for forming into the mold to bond with the film, and making the film with the printed pattern and the resin form an integral body and cure into the character icon layer 3.

[0067] The first polymer and the second polymer here indicate that the materials of the substrate layer 1 and the covering layer 2 are different. However, they are both light-transmitting polymer materials for injection molding connection. The specific process can be two-color injection molding or secondary injection molding. The following takes two-color injection molding as an example for introduction. One material flow is the first polymer of the substrate layer 1, and the other material flow is the second polymer of the covering layer 2. It can be first injection molded in an injection molding machine to form one of the substrate layer 1 and the covering layer 2, for example, first form the substrate layer 1. Then, on the basis of the formed substrate layer 1, the other material flow in the same injection molding machine is used for injection molding of the covering layer 2, thus realizing the glue-free fixed connection between the substrate layer 1 and the covering layer 2.

[0068] Preferably, the first polymer and the second polymer may include the same polymerization raw materials, that is, although the first polymer and the second polymer are different polymers, they have the same polymerization raw materials, making it easy for them to be cured and directly connected during the injection molding process. The principle is that, for example, the matrix layer 1 of the first polymer is first compression molded at a temperature above the softening temperature. When the covering layer 2 of the second polymer is injection molded onto the matrix layer 1, its temperature is also above the softening temperature at this time. In this way, the matrix layer 1 and the covering layer 2 are tightly bonded together through the connection of the polymerization groups of the fairy. Preferably, the material of the covering layer 2 includes a light-transmitting thermoplastic elastomer of styrene (TPS); the material of the matrix layer 1 includes a light-transmitting polypropylene plastic (PP). The specific manufacturing process of the light-transmitting TPS can be obtained by a physical method using PP, white oil, and a hydrogenated styrene-butadiene block copolymer (SEBS) through a twin-screw extruder, that is, TPS-SEBS can also be obtained by a chemical method using a catalyst. It can be understood that the material of the covering layer 2 can also be TPS-SIS (styrene-isoprene-styrene), TPS-SBS (styrenic block copolymers), TPS-SEPS (styrene-ethylene / propylene-styrene block copolymer). The light transmittance of the light-transmitting TPS using the above raw materials can reach more than 80%, which is much greater than the light transmittance of general TPE (usually below 20%). The combination of TPS and PP can make the structure of the glue-free fixed connection between the matrix layer 1 and the covering layer 2 more reliable. It can be understood that the polymerization raw materials of the first polymer and the second polymer can also be different. For example, the material of the covering layer 2 can include a light-transmitting TPS; the material of the matrix layer 1 can include a light-transmitting PC or a light-transmitting PMMA. Although the polymerization raw materials of the polymers of the matrix layer 1 and the covering layer 2 are different, a coupling agent can be added to the injection molding material flow to also achieve a relatively tight glue-free connection effect. However, compared with the combination of the same polymerization raw materials, its cost is higher and the bonding effect is slightly inferior, but the light-transmitting effect of PC and PMMA can be greater than that of PP.

[0069] Reference Figure 3 、 Figure 4 As shown, embodiments are respectively shown in which the character icon layer 3 is provided on the outer surface 22 of the covering layer and the character icon layer 3 is provided on the inner surface 12 of the matrix layer.

[0070] Such as Figure 3As shown, in the first embodiment, the character icon layer 3 is disposed on the outer surface 22 of the covering layer. Correspondingly, the material of the covering layer 2 is a foamed second polymer, or the thickness of the covering layer 2 is above the critical thickness, that is, when the covering layer 2 is relatively thick. The foamed second polymer, such as foamed TPS, has a relatively soft feel, which can make the feel of the light-transmitting panel member 10 better. However, foaming and relatively thick thickness are likely to affect the clarity and accuracy of character icon display. The inventor found that when the character icon layer 3 is disposed on the outer surface 22 of the covering layer, the character icon display in this structure can be relatively clear and accurate.

[0071] And as Figure 4 shown, in the second embodiment, the character icon layer 3 is disposed on the inner surface 12 of the base layer. At this time, the material of the corresponding covering layer 2 is a non-foamed second polymer, and the thickness of the covering layer 2 is less than the critical thickness, that is, when the covering layer 2 is relatively thin. The critical thickness here can be specifically obtained through a side view, that is, within a certain thickness range, the thickness does not affect the clarity and accuracy of character icon display, and the maximum thickness of this thickness range is the critical thickness. The inventor found that in the case of a non-foamed and relatively thin second polymer, the influence on the display effect of the character icon is relatively small. By disposing the character icon layer 3 on the inner surface 12 of the base layer, its processing technology is simpler and easier to implement.

[0072] As can be known from the above, the beneficial effects of the light-transmitting panel member introduced in the above embodiments include but are not limited to, through the direct injection molding connection of the base layer and the covering layer, and the structure in which the character icon layer is disposed on the inner surface of the covering layer or the outer surface of the base layer by in-mold insert injection molding or in-mold decoration, the non-glue fixed connection among the base layer, the character icon layer, and the covering layer is realized, which not only simplifies the manufacturing process, but also makes the display effect of the character icon clearer and more accurate because there is no need to use glue bonding.

[0073] Referring to Figure 5 shown, as introduced above, the steps of manufacturing the light-transmitting panel member 10 can be:

[0074] S1: Injection molding and pressing one of the base layer 1 and the covering layer 2;

[0075] S2: On the base layer 1 or the covering layer 2 obtained in S1, injection mold the other of the base layer 1 and the covering layer 2, so that the base layer 1 and the covering layer 2 are fixedly connected without glue;

[0076] S3. Dispose the character icon layer 3 on the outer surface 22 of the covering layer or the inner surface 12 of the base layer.

[0077] For example, in S1, the substrate layer 1 is first obtained by injection molding. In S2, on the basis of the substrate layer 1 obtained in S1, the covering layer 2 is injection molded to achieve a glue-free fixed connection between the substrate layer 1 and the covering layer 2.

[0078] The specific process in S3, continuing from what was introduced above, can be in-mold insert injection molding. That is, the surface of the character icon layer 3 is a hardened transparent film, the middle is a printed pattern layer, and the back is a plastic layer. Since the ink is sandwiched in the middle, it can prevent the surface of the product from being scratched and make it wear-resistant, and can maintain the vivid color for a long time without fading. It can also be in-mold decoration molding, that is, the character icon layer 3 is formed by placing a film with a printed pattern into a mold (such as a metal mold), injecting the resin for forming into the mold to bond with the film, and making the film with the printed pattern and the resin form an integral body and cure to form the character icon layer 3.

[0079] Preferably, in some embodiments, in S1 and S2, two-color injection molding is carried out using the same injection molding equipment. This can simplify the equipment and space requirements of the manufacturing process. However, this is not a limitation. For example, it can also be a process of secondary injection molding with different injection molding equipment.

[0080] In summary, the beneficial effects of the light-transmitting panel and its manufacturing method described in the above embodiments include but are not limited to: through the direct injection molding connection between the substrate layer and the covering layer, and the structure that the character icon layer is arranged on the inner surface of the covering layer or the outer surface of the substrate layer by in-mold insert injection molding or in-mold decoration, a glue-free fixed connection between the substrate layer, the character icon layer, and the covering layer is achieved, which not only simplifies the manufacturing process, but also makes the display effect of the character icon clearer and more accurate because no glue bonding is required.

[0081] Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change, and decoration made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A light-transmitting panel member (10), characterized in that, Comprising: A substrate layer (1) having an outer surface (11) and an inner surface (12) of the substrate layer; A covering layer (2) located on one side of the outer surface (11) of the substrate layer, having an inner surface (21) and an outer surface (22) of the covering layer, and the inner surface (21) of the covering layer at least partially covers the outer surface (11) of the substrate layer; A character icon layer (3) disposed on the outer surface (22) of the covering layer or the inner surface (12) of the substrate layer, having a character icon (31); Wherein, the material of the substrate layer (1) includes a light-transmitting first polymer, the material of the covering layer (2) includes a light-transmitting second polymer, the covering layer (2) is directly connected to the substrate layer (1) by injection molding, and the character icon layer (3) is disposed on the inner surface (21) of the covering layer or the outer surface (11) of the substrate layer by in-mold insert injection molding (IML) or in-mold decoration (IMD), so that the substrate layer (1), the character icon layer (3), and the covering layer (2) are fixedly connected without glue; The light-transmitting direction of the light-transmitting panel member (10) is from the substrate layer (1) towards the covering layer (2).

2. The light-transmitting panel member (10) according to claim 1, characterized in that, The first polymer and the second polymer include the same polymerization raw materials.

3. The light-transmitting panel member (10) according to claim 2, characterized in that, The material of the covering layer (2) includes a light-transmitting styrenic thermoplastic elastomer (TPS); the material of the substrate layer (1) includes a light-transmitting polypropylene plastic (PP).

4. The light-transmitting panel member (10) according to claim 1, characterized in that, The material of the covering layer (2) includes a light-transmitting styrenic thermoplastic elastomer (TPS); the material of the substrate layer (1) includes a light-transmitting polycarbonate (PC) or a light-transmitting polymethyl methacrylate (PMMA).

5. The light-transmitting panel member (10) according to claim 1, characterized in that, The material of the covering layer (2) is the foamed second polymer, or the thickness of the covering layer (2) is above a critical thickness, and the character icon layer (3) is disposed on the outer surface (22) of the covering layer.

6. The light-transmitting panel member (10) according to claim 1, characterized in that, The material of the covering layer (2) is the non-foamed second polymer, and the thickness of the covering layer (2) is less than the critical thickness, and the character icon layer (3) is disposed on the inner surface (12) of the substrate layer.

7. The light-transmitting panel member (10) according to claim 1, characterized in that, It further includes a light source (4) located on one side of the inner surface (12) of the substrate layer, and the light-transmitting direction of the light beam provided by the light source (4) is to pass through the substrate layer (1) first and then through the covering layer (2).

8. The light-transmitting panel member (10) according to any one of claims 1-7, characterized in that, The light-transmitting panel member (10) is at least a part of an interior trim member (100) of a vehicle.

9. A manufacturing method of a light-transmitting panel member, characterized in that, For manufacturing the light-transmitting panel member (10) according to any one of claims 1-8, the manufacturing method includes: S1. Injection molding and pressing one of the substrate layer (1) and the covering layer (2); S2. On the substrate layer (1) or the covering layer (2) obtained in S1, injection molding the other of the substrate layer (1) and the covering layer (2) so that the substrate layer (1) and the covering layer (2) are fixedly connected without glue; S3. Dispose the character icon layer (3) on the outer surface (22) of the covering layer or the inner surface (12) of the substrate layer.

10. The manufacturing method according to claim 9, characterized in that, In S1 and S2, two-color injection molding is performed using the same injection molding equipment.

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