Method for the production of 2.5d or 3d protective shells with soft protective skin

Abstract

The application discloses a preparation method of a 2.5D or 3D protective shell with a soft protective skin, and relates to the technical field of 2.5D or 3D protective shell preparation. The preparation method comprises the following steps: S1, a soft protective skin with a thermoplastic support layer is prepared, and the soft protective skin is supported into a 2.5D or 3D shape by the thermoplastic support layer, wherein the thermoplastic support layer is located at the inner side of the 2.5D or 3D shape of the soft protective skin; S2, the soft protective skin with the thermoplastic support layer obtained in the step S1 is placed in a mold for overmolding. When overmolding, molten thermoplastic plastic flows to the inner side of the thermoplastic support layer, and flows to the edge of the soft protective skin and the edge of the thermoplastic support layer, and is formed into a protective shell body after cooling and molding. The thermoplastic plastic has fluidity when overmolding, so that the thermoplastic plastic can be seamlessly attached to the edge of the 2.5D or 3D shape of the soft protective skin.

Description

Technical Field

[0001] This invention relates to the field of 2.5D or 3D protective shell preparation technology, specifically to a method for preparing a 2.5D or 3D protective shell with a soft protective skin. Background Technology

[0002] Currently, the most common protective cases for 3C products on the market are mobile phone cases and tablet cases. Taking mobile phone cases as an example, with the continuous upgrading of technology and aesthetics, mobile phone cases with soft protective leather (such as PU leather, organic silicone, genuine leather, and imitation leather) on the outer surface have emerged.

[0003] For example, the Chinese utility model patent with patent number 201720123416.1, entitled "A TPU and Leather Composite Mobile Phone Protective Case," "includes a concave shell that mates with the back cover of a mobile phone, the concave shell being made of TPU material, and a leather layer being provided on the back of the concave shell. The leather layer is bonded to the leather layer on the concave shell." Its accompanying drawings also show the leather layer bonded in a planar manner.

[0004] Or, as in the Chinese utility model patent No. 201721840740.1, "A Lightweight TPU Protective Shell with a Power Bank," "the foamed TPU shell has arc-shaped structures on both the left and right sides, a layer of PET composite fleece is installed on the inner wall of the foamed TPU shell, and the outer PU leather is fixedly installed on the outer wall of the foamed TPU shell, with arc-shaped structures on both the left and right sides of the outer PU leather." The PU leather can be set into an arc-shaped structure (2.5D or 3D).

[0005] When manufacturing such a mobile phone case with a soft protective skin, the soft protective skin is simply attached to the groove on the outer back of the mobile phone case using hot melt adhesive to ensure a seamless fit between the soft protective skin and the outer side of the mobile phone case.

[0006] For example, OPPO's patent application No. 201921559679.2, entitled "Protective Case, Electronic Device," describes a protective case comprising: a main body having a first surface and a second surface disposed opposite to each other; a sidewall surrounding the main body, defining a first receiving space on the side of the second surface of the main body away from the first surface, and defining a second receiving space on the side of the first surface of the main body away from the second surface; and a leather layer disposed in the second receiving space. Thus, by providing a leather layer on the outer surface of the main body, the wear resistance of the protective case can be improved. In addition to improving aging resistance, it also enhances the appearance and texture of the protective case. Furthermore, placing the leather layer in the second receiving space further improves the uniformity of the protective case's appearance and enhances the user experience. The sidewall portion may include a first end face and a second end face disposed opposite each other, wherein the first end face is close to the first face of the main body, and the first distance between the first end face and the first face may be equal to the thickness of the leather layer. That is to say, after the leather layer is placed on the outer surface of the main body, the leather layer can be flush with the first end face of the sidewall portion, thus creating a seamless junction between the leather layer and the sidewall portion. The leather layer may be hot-pressed into the second receiving space using hot melt adhesive.

[0007] However, the above preparation method is only suitable for flat bonding of soft protective skin. The soft protective skin can only be attached to the outer back of the phone case. If the soft protective skin is attached in a 2.5D (curved) or 3D shape, such as the "arc structure on both the left and right sides of the outer PU leather" proposed in the utility model with patent number 201721840740.1 mentioned above, the edge of the soft protective skin cannot be seamlessly attached to the phone case.

[0008] Although the soft protective skin is bonded to the outer side of the phone case with hot melt adhesive to form a 2.5D or 3D shape, in daily use, the edges of the soft protective skin cannot be seamlessly bonded to the phone case, which can easily lead to adhesive peeling and detachment.

[0009] If we disregard the issue of non-seamless adhesion leading to easy glue peeling and flaking, setting the soft protective skin to a 2.5D or 3D shape that corresponds to the outer side of the phone case will obviously provide a better user experience. Summary of the Invention

[0010] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing a 2.5D or 3D protective shell with a soft protective layer, the method comprising:

[0012] S1. Prepare a soft protective skin with a thermoplastic support layer, and support the soft protective skin into a 2.5D or 3D shape by the thermoplastic support layer, wherein the thermoplastic support layer is located on the inside of the 2.5D or 3D soft protective skin.

[0013] S2. Place the soft protective skin with thermoplastic support layer obtained in step S1 into the mold for molding. During molding, the molten thermoplastic plastic flows to the inside of the thermoplastic support layer, as well as to the edge of the soft protective skin and the edge of the thermoplastic support layer, and is formed into a protective shell after cooling and molding.

[0014] As a further aspect of the present invention: In step S1:

[0015] First, flatten and press the soft protective skin and the thermoplastic support layer together to form a composite structure.

[0016] The composite structure is then shaped to form a 2.5D or 3D shape.

[0017] As a further aspect of the present invention: the bonding is to bond the thermoplastic support layer to the soft protective skin after it is hot-melted, or to provide at least one hot-melt adhesive layer between the soft protective skin and the thermoplastic support layer to bond the soft protective skin to the thermoplastic support layer.

[0018] As a further aspect of the present invention: before step S2, a thermoplastic base is bonded to the inner side of a 2.5D or 3D shaped thermoplastic support layer by hot melt adhesive. The thermoplastic base has a magnet mounting groove for mounting magnets, and the magnet mounting groove has a mounting opening located on the side of the thermoplastic base away from the thermoplastic support layer.

[0019] As a further aspect of the present invention: during the molding process in step S2, the molten thermoplastic also flows to the edge of the thermoplastic base.

[0020] As a further aspect of the present invention: the thermoplastic plastic is a thermoplastic plastic composed of any one of TPU, PC, ABS, and PMMA, or a thermoplastic composite plastic containing any one of TPU, PC, ABS, and PMMA.

[0021] As a further aspect of the present invention: the thermoplastic support layer is thermoplastic glass fiber.

[0022] As a further aspect of the present invention: the soft protective leather is PU leather, genuine leather, or imitation leather.

[0023] As a further aspect of the present invention: in step S2, the temperature of the thermoplastic material during molding is 200℃-240℃.

[0024] As a further aspect of the present invention: the thickness of the thermoplastic support layer is 0.30mm-0.40mm, and the thickness of the soft protective skin is 0.25mm-0.35mm.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] Before overmolding, a thermoplastic support layer supports the soft protective skin, allowing it to maintain its 2.5D or 3D shape. During overmolding, the thermoplastic support layer ensures the soft protective skin retains its 2.5D or 3D shape. When the 2.5D or 3D soft protective skin with the thermoplastic support layer is placed in the mold and overmolding is performed, its shape remains stable and is less susceptible to deformation due to the flowing thermoplastic, ensuring smooth overmolding. During overmolding, the molten... Thermoplastic plastics have fluidity, allowing them to flow and come into close contact with the edges of 2.5D or 3D shaped soft protective skins, as well as the edges and inner sides of 2.5D or 3D shaped thermoplastic support layers. After molding, a seamless fit between the thermoplastic plastic and the edges of the soft protective skin is achieved. By using thermoplastic support layers and thermoplastic plastics, the thermoplastic (thermoplastic support layer) and thermoplastic (thermoplastic plastic) exhibit adhesiveness during molding, resulting in a more stable bond between the thermoplastic support layer and the thermoplastic plastic after molding.

[0027] The thermoplastic support layer can be used to support the soft protective skin in 2.5D or 3D shapes, making the soft protective skin suitable for overlay molding. The fluidity of the thermoplastic during overlay molding allows the thermoplastic to fit seamlessly with the edges of the 2.5D or 3D soft protective skin. On the other hand, the thermoplastic support layer and the thermoplastic can bond together during overlay molding, resulting in a more firmly bonded protective shell after cooling and molding.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a flowchart of the preparation method of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the protective shell prepared by the method of the present invention;

[0032] Figure 3 yes Figure 2 Enlarged schematic diagram of a local structure at point A;

[0033] Figure 4 This is another structural schematic diagram of the protective shell prepared by the method of the present invention, and... Figure 2 The difference lies in the use of a hot melt adhesive layer;

[0034] Figure 5 yes Figure 4 Enlarged schematic diagram of the local structure at point B;

[0035] Figure 6 This is a schematic diagram of the structure of the bearing platform and the top pressure head in the preparation method of the present invention;

[0036] Figure 7 This is another structural schematic diagram of the bearing platform and the top pressure head in the preparation method of the present invention, and... Figure 6 The difference lies in the addition of a heating element;

[0037] Figure 8 This is a schematic diagram of the mold structure in the preparation method of the present invention. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1-8 A method for preparing a 2.5D or 3D protective shell with a soft protective layer.

[0040] Preparation methods include

[0041] S1. Prepare a soft protective skin 1 with a thermoplastic support layer 2, and make the soft protective skin 1 supported by the thermoplastic support layer 2 into a 2.5D or 3D shape, wherein the thermoplastic support layer 2 is located on the inside of the 2.5D or 3D soft protective skin 1.

[0042] S2. Place the soft protective skin 1 with thermoplastic support layer 2 obtained in step S1 into the mold for molding. During molding, the molten thermoplastic plastic flows to the inside of the thermoplastic support layer 2, as well as to the edge of the soft protective skin 1 and the edge of the thermoplastic support layer 2, and is formed into a protective shell 3 after cooling and molding.

[0043] Further, in step S1: first, the soft protective skin 1 and the thermoplastic support layer 2 are flattened, pressed, and bonded together, so that the soft protective skin 1 and the thermoplastic support layer 2 are stacked to form a composite structure; then, the composite structure is shaped to form a 2.5D or 3D shape.

[0044] Furthermore, when flattening and pressing the soft protective skin 1 and the thermoplastic support layer 2 together, "flattening and pressing" can be done on the soft protective skin and the thermoplastic support layer after they are stacked together, or it can be done on the soft protective skin and the thermoplastic support layer separately.

[0045] Furthermore, when flattening and pressing the soft protective skin 1 and the thermoplastic support layer 2 together, "adhesion" can mean that the thermoplastic support layer 2 is melted and then bonded to the soft protective skin 1, or that at least one hot melt adhesive layer 4 is provided between the soft protective skin 1 and the thermoplastic support layer 2 to bond the two together.

[0046] Furthermore, when molding composite structures: such as Figure 8 As shown, molding can be performed using a compression mold 100. The mold base 101 has a corresponding 2.5D or 3D shaped groove 102. The stacked structure obtained by flattening, pressing, and bonding is placed on the mold base 101, and the soft protective skin 1 is aligned with the lower groove 102. Then, the upper movable pressing head 103 is used to press down, so that the pressing head 103 and the groove 102 cooperate to obtain a 2.5D or 3D shaped stacked structure. The thermoplastic support layer 2 is located inside the 2.5D or 3D shaped soft protective skin 1.

[0047] During the overmolding process, the thermoplastic plastic can be a thermoplastic plastic composed of any one of TPU, PC, ABS, or PMMA, or a thermoplastic composite plastic containing any one of TPU, PC, ABS, or PMMA. In step S2, the temperature of the plastic material during overmolding is preferably 200℃-240℃. More preferably, in step S2, the temperature of the plastic material during overmolding is 210℃.

[0048] The thermoplastic support layer has adhesive properties to the thermoplastic plastic at high temperatures, and after cooling, the thermoplastic support layer and the thermoplastic plastic can bond more tightly.

[0049] The thermoplastic support layer is preferably thermoplastic glass fiber. The soft protective skin is preferably PU leather, genuine leather, or imitation leather. The thickness of the thermoplastic support layer is preferably 0.30mm-0.40mm, and the thickness of the soft protective skin is preferably 0.25mm-0.35mm. More preferably, the thickness of the thermoplastic support layer is 0.35mm, and the thickness of the soft protective skin is 0.30mm.

[0050] Before the molding process, the soft protective skin 1 is supported by the thermoplastic support layer 2. After the soft protective skin 1 forms a 2.5D or 3D shape, the soft protective skin 1 can maintain its shape.

[0051] During the overmolding process, because the soft protective skin 1 is supported by the thermoplastic support layer 2, the soft protective skin 1 can maintain a 2.5D or 3D shape. When the soft protective skin 1 with the thermoplastic support layer 2 is placed in the mold and overmolding is performed, the shape of the soft protective skin 1 can be maintained relatively stably and is not easily deformed by the flowing thermoplastic plastic, thus ensuring the smooth progress of the overmolding operation.

[0052] During molding, the molten thermoplastic plastic has fluidity, allowing it to come into close contact with the edge of the 2.5D or 3D shaped soft protective skin 1 and the edge and inner side of the 2.5D or 3D shaped thermoplastic support layer 2 through flow. After molding, a seamless fit between the thermoplastic plastic and the edge of the soft protective skin can be achieved, that is, a seamless fit between the protective shell 3 and the edge of the soft protective skin 1.

[0053] By using a thermoplastic support layer and thermoplastic plastic, the thermoplastic (thermoplastic support layer) and thermoplastic (thermoplastic plastic) have adhesive properties during molding, and after molding, the thermoplastic support layer can bond more firmly with the thermoplastic plastic.

[0054] The thermoplastic support layer 2 can be used to support the soft protective skin 1 in a 2.5D or 3D shape, making the soft protective skin 1, which can maintain a 2.5D or 3D shape, suitable for overlay molding. Through the fluidity of the thermoplastic plastic during overlay molding, the thermoplastic plastic can be seamlessly attached to the edge of the 2.5D or 3D shaped soft protective skin 1. On the other hand, during overlay molding, the thermoplastic support layer 2 can be bonded to the thermoplastic plastic, and after cooling and molding, a more firmly bonded protective shell can be obtained.

[0055] In this embodiment of the invention, before step S2, a thermoplastic base 5 can be provided on the inner side of the 2.5D or 3D shaped thermoplastic support layer 2. Preferably, the thermoplastic base 5 is bonded to the inner side of the 2.5D or 3D shaped thermoplastic support layer 2 by hot melt adhesive.

[0056] The thermoplastic base 5 has a magnet mounting groove 6 for mounting magnets, and the magnet mounting groove 6 has a mounting opening located on the side of the thermoplastic base 5 away from the thermoplastic support layer.

[0057] The magnet mounting slot 6 can be used to install magnets so that the protective case has a magnetic attraction effect. For example, it can be used as a mobile phone protective case with a magnetic attraction effect, a tablet battery protective case with a magnetic attraction effect, etc., and the overall functionality is better.

[0058] Preferably, during the die-casting process in step S2, the molten thermoplastic plastic also flows to the edge of the thermoplastic base 5. The thermoplastic base has adhesive properties to the high-temperature thermoplastic plastic, and after cooling, the thermoplastic base can be more firmly held on the phone case through the adhesion between the thermoplastic support layer and the thermoplastic plastic.

[0059] After the protective shell described above is prepared, and the magnet is installed in the magnet mounting slot 6, at least one cover plate can be provided on the thermoplastic base 5 to cover the mounting opening of the magnet mounting slot 6. This improves the aesthetics and prevents the magnet from falling out of the magnet mounting slot 6. The cover plate can be provided by adhesive bonding.

[0060] In this embodiment of the invention, when the soft protective skin and the thermoplastic support layer are flattened and pressurized separately:

[0061] like Figure 6 As shown, a flattening and pressing operation can be performed using a support platform 201 and a pressing head 202. The support platform 201 is used to support the aforementioned materials (soft protective skin, thermoplastic support layer). The pressing head 202 can perform a pressing action that approaches the support platform 201 and a releasing action that moves away from it to press the aforementioned materials so that the materials are pressed flat.

[0062] After the soft protective skin and thermoplastic support layer are flattened and pressed separately, and before the soft protective skin and thermoplastic support layer are stacked to form a composite structure, at least one hot melt adhesive layer 4 can be provided between the soft protective skin 1 and the thermoplastic support layer 2 so that the two can be bonded together after being stacked.

[0063] In this embodiment of the invention, when the overlapping soft protective skin and thermoplastic support layer are flattened and top-pressed:

[0064] like Figure 6 As shown, a flattening and pressing operation can be performed using a support platform 201 and a pressing head 202. The support platform 201 is used to support the aforementioned material (a soft protective skin and a thermoplastic support layer that are stacked together). The pressing head 202 can perform a pressing action that approaches the support platform 201 and a releasing action that moves away from it to press the aforementioned material so that the material is pressed flat.

[0065] When performing flattening and pressing, it is preferable to perform heated flattening and pressing, that is, while flattening and pressing the overlapping soft protective skin and thermoplastic support layer, the overlapping soft protective skin and thermoplastic support layer are heated at the same time, especially the thermoplastic support layer.

[0066] Heated flattening and pressing can be achieved by raising the temperature of the bearing platform 201 and / or the pressing head 202, which can, for example... Figure 7 The heating element 203 (or heat-conducting element) is shown mounted on the support platform and / or mounted on the top pressure head.

[0067] The pressure head performs a close-proximity pressure action relative to the bearing platform, causing the pressure head and the bearing platform to jointly flatten and press the overlapping soft protective skin and thermoplastic support layer: during the flattening and pressing, the heat from the bearing platform and / or the pressure head can be transferred to the soft protective skin and thermoplastic support layer, especially to the thermoplastic support layer, so as to raise its temperature.

[0068] The heating element can be an electric heating element, that is, its temperature can rise after being energized, thereby driving up the temperature of the bearing platform and / or the pressure head; the heat-conducting element can be a heat-conducting pipe of a liquid heat system, that is, the temperature of the heat-conducting element is raised by the high temperature liquid of the liquid heat system, thereby driving up the temperature of the bearing platform and / or the pressure head.

[0069] In addition to flattening and pressing, heated flattening and pressing equipment can also be used for softening or hot melting.

[0070] When heated flattening and pressing is used for softening: Before flattening and pressing, a hot melt adhesive layer 4 is provided between the overlapping soft protective skin 1 and thermoplastic support layer 2 to bond them together. The main object softened by heated flattening and pressing is the thermoplastic support layer. After heated flattening and pressing is completed, and the pressing head 202 moves away from the bearing platform 201 in a releasing action, the resulting composite structure can be separated from the high-temperature components (bearing platform and / or pressing head). Because the thermoplastic support layer softened by heat can be cooled again to maintain the flattened shape obtained during the pressing, a flatter composite structure is obtained. By using hot melt adhesive, in addition to bonding the soft protective skin to the thermoplastic support layer after flattening and pressing, the relative position of the soft protective skin and the thermoplastic support layer after stacking can be well maintained before flattening and pressing, and it is not easy for them to shift.

[0071] When heated flattening and pressing are used for hot-melt bonding: the thermoplastic support layer to be melted should be able to contact the soft protective skin, especially the portion of the thermoplastic support layer near the soft protective skin after being melted. Preferably, the thermoplastic support layer and the soft protective skin are directly laminated, so that the bonding area is wider when bonded by hot-melt bonding. Using hot-melt bonding to obtain the laminated structure effectively reduces operational steps (eliminating the need for a hot-melt adhesive layer between the soft protective skin and the thermoplastic support layer) and significantly reduces costs (i.e., no hot-melt adhesive layer is required).

[0072] It's worth noting that for thermoplastic support layers of the same material, the difference between softening and melting upon heating lies in the different heating temperatures; softening occurs at a lower temperature than melting. Furthermore, the softening and melting temperatures may differ for thermoplastic support layers of different materials.

[0073] When heated flattening and pressing is used to soften the thermoplastic support layer, the thermoplastic support layer can be made of a material with a large difference between its lowest softening temperature and its hot melt temperature, preferably more than 20°C. This allows for better setting of the heating temperature and heating time, ensuring that it is softened by heat rather than hot melted.

[0074] When heated flattening and pressing is used for the hot melting of thermoplastic support layers, the thermoplastic support layer can be made of a material with a lower hot melting temperature, preferably not exceeding the temperature of the plastic material during molding, so that it can be hot melted more easily.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. Process for the preparation of a 2.5D or 3D protective case with a soft protective skin, characterized in that, The preparation method comprises S1, preparing a soft protective skin with a thermoplastic support layer, and supporting the soft protective skin into a 2.5D or 3D shape by the thermoplastic support layer, wherein the thermoplastic support layer is located on the inner side of the soft protective skin in the 2.5D or 3D shape; S2, placing the soft protective skin with the thermoplastic support layer obtained in step S1 into a mold for overmolding, wherein, during overmolding, the molten thermoplastic plastic flows to the inner side of the thermoplastic support layer, and flows to the edge of the soft protective skin and the edge of the thermoplastic support layer, and is molded into a protective shell after cooling; In step S1: the soft protective skin and the thermoplastic support layer are first flattened and pressed to be bonded, so that the soft protective skin and the thermoplastic support layer are laminated to form a laminated structure; and then the laminated structure is formed into a 2.5D or 3D shape. The flattening and pressing is performed on the laminated soft protective skin and thermoplastic support layer. During the flattening and pressing, a bearing platform and a pressing head are used for the flattening and pressing operation, the bearing platform is used for bearing the laminated soft protective skin and thermoplastic support layer, and the pressing head can perform close pressing and away loosening relative to the bearing platform to press the laminated soft protective skin and thermoplastic support layer to be flattened. The bearing platform and / or the pressing head are provided with a heating element or a heat-conducting element. During the close pressing of the pressing head relative to the bearing platform, the pressing head and the bearing platform jointly perform the flattening and pressing on the laminated soft protective skin and thermoplastic support layer, and during the flattening and pressing, heat is transferred from the bearing platform and / or the pressing head to the soft protective skin and the thermoplastic support layer to increase the temperature of the thermoplastic support layer. The thermoplastic support layer is hot-melted. The hot-melted thermoplastic support layer is in contact with the soft protective skin. The bonding is that the hot-melted thermoplastic support layer is bonded to the soft protective skin. The hot-melt temperature of the thermoplastic support layer does not exceed the temperature of the plastic material during overmolding. In step S2: The thermoplastic support layer and the high-temperature thermoplastic plastic are bonded by the hot-melted thermoplasticity and the bonding property of the thermoplasticity, and after cooling, the thermoplastic support layer and the thermoplastic plastic are correspondingly bonded.

2. The preparation method of the 2.5D or 3D protective shell with a soft protective skin according to claim 1, wherein Before step S2, a thermoplastic base is bonded on the inner side of the 2.5D or 3D thermoplastic support layer by hot-melt adhesive, the thermoplastic base is provided with a magnet mounting groove for mounting a magnet, and the magnet mounting groove is provided with a mounting opening located on the side of the thermoplastic base away from the thermoplastic support layer.

3. The preparation method of the 2.5D or 3D protective shell with a soft protective skin according to claim 2, wherein During overmolding in step S2, the molten thermoplastic plastic also flows to the edge of the thermoplastic base.

4. The method of claim 1, wherein the 2.5D or 3D protective case with a soft protective skin is prepared by, The thermoplastic plastic is a thermoplastic plastic composed of any one of TPU, PC, ABS, and PMMA, or a thermoplastic composite plastic containing any one of TPU, PC, ABS, and PMMA.

5. The method of manufacturing a 2.5D or 3D protective case with a soft protective skin according to claim 1, characterized in that, The thermoplastic support layer is a thermoplastic glass fiber.

6. The method of manufacturing a 2.5D or 3D protective case with a soft protective skin according to claim 1, characterized in that, The soft protective skin is PU skin, real leather, or imitation leather.

7. The method of manufacturing a 2.5D or 3D protective case with a soft protective skin according to claim 1, characterized in that, In step S2, the temperature of the thermoplastic plastic material is 200-240°C.

8. The method of claim 1, wherein the 2.5D or 3D protective case with a soft protective skin is prepared by, The thickness of the thermoplastic support layer is 0.30-0.40 mm and the thickness of the soft protective skin is 0.25-0.35 mm.

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