Synthetic leather and electronic equipment shell

Abstract

The utility model relates to the technical field of synthetic leather, in particular to synthetic leather and an electronic equipment shell. The utility model provides synthetic leather which comprises a TPU (Thermoplastic Polyurethane) substrate layer, a TPU (Thermoplastic Polyurethanes) layer and a TPU (Thermoplastic Polyurethane) layer, the PU layer is arranged on the surface of one side, on which the laser pattern is formed, of the TPU substrate layer; laser nicks corresponding to the laser patterns are formed on the PU layer; and the orthographic projection of the laser pattern towards the PU layer falls into the laser nick along the thickness direction of the synthetic leather. The synthetic leather provided by the utility model has the advantages of excellent environmental protection property, strong fitting property, smooth laser pattern and rich visual effect.

Description

Technical Field

[0001] This utility model relates to the field of synthetic leather technology, specifically to synthetic leather and electronic device housings. Background Technology

[0002] With the rapid development of the electronics industry, the appearance design of back covers or protective cases for electronic products such as mobile phones and laptops has become particularly important. After transitioning from plastic, metal, and glass to other casing materials, some electronic products are now incorporating new materials such as synthetic leather and suede. These materials, unlike the cold and hard casing materials of traditional electronic products, offer a softer feel and enrich design elements.

[0003] Currently, synthetic leather used in electronic products is mainly PU synthetic leather and silicone synthetic leather. Generally, the base material of PU synthetic leather is made of nylon cloth, Oxford cloth, fiberglass cloth, cotton cloth, polyester cloth, microfiber cloth, etc. These base materials lack elasticity and are prone to poor adhesion when combined with plastics, fiber-reinforced composites, metals, glass, and other shell materials, leading to wrinkles at the edges and corners and easy delamination. Furthermore, current synthetic leather materials rely solely on the outermost layer as an appearance layer, resulting in a monotonous visual effect and a lack of depth. Utility Model Content

[0004] Therefore, it is necessary to provide a synthetic leather that addresses the issues of poor adhesion and monotonous visual effects.

[0005] This utility model provides a synthetic leather, comprising:

[0006] The TPU base layer has a laser pattern formed on one side of its surface;

[0007] A PU layer is disposed on the surface of the TPU base layer on the side where the laser pattern is formed; laser engravings corresponding to the laser pattern are formed on the PU layer; along the thickness direction of the synthetic leather, the orthogonal projection of the laser pattern toward the PU layer falls into the laser engravings.

[0008] In one embodiment, the TPU base layer is one or more layers;

[0009] Wherein, when the TPU base layer is multilayered, each sublayer of the TPU base layer is stacked along the thickness direction of the synthetic leather.

[0010] In one embodiment, when the TPU substrate layer is multilayered, the plurality of laser patterns are each independently formed in each sublayer of the TPU substrate layer;

[0011] In two adjacent sublayers, the size of the laser pattern in the sublayer closer to the PU layer is not smaller than the size of the laser pattern in the sublayer farther from the PU layer.

[0012] In one embodiment, at least two adjacent sublayers in the TPU base layer have different color development properties.

[0013] In one embodiment, the TPU base layer is any one of a polyester polyurethane layer, a polyether polyurethane layer, and an aliphatic polyurethane layer;

[0014] And / or, the Shore hardness of the TPU substrate is 60A to 90A;

[0015] And / or, the antibacterial rate of the TPU base layer is not less than 90%;

[0016] And / or, the flame retardancy of the TPU substrate is not less than UL94V2 level.

[0017] In one embodiment, the thickness of the TPU substrate layer is 0.1 mm to 0.4 mm;

[0018] And / or, the thickness of the synthetic leather is 0.2mm to 0.6mm.

[0019] In one embodiment, the synthetic leather further includes a functional layer, which includes at least one of a foaming layer, a barrier layer, a surface layer, a surface treatment layer, and a tactile layer.

[0020] Each functional layer is independently disposed on the side of the PU layer facing away from the TPU substrate layer, or between the PU layer and the TPU substrate layer; and laser engravings corresponding to the laser pattern are formed on the functional layer.

[0021] A second aspect of this application provides an electronic device housing, comprising synthetic leather and a substrate layer, wherein the synthetic leather is the synthetic leather described in any of the first aspects of this application;

[0022] The TPU base layer is disposed close to the substrate layer.

[0023] In one embodiment, the substrate layer is any one of a plastic layer, a fiber-reinforced composite material layer, a glass layer, or a metal layer.

[0024] In one embodiment, the synthetic leather is bonded to the substrate layer by one or more of the following methods: adhesive bonding, hot pressing, and injection molding.

[0025] The synthetic leather of this invention has at least the following advantages:

[0026] This invention uses a TPU base layer, avoiding the poor environmental performance of traditional PVC materials. Furthermore, a PU layer is added on top of the TPU base layer, giving the synthetic leather the high strength, high elasticity, soft touch, and good weather resistance of TPU, thereby improving the practical performance and application range of the synthetic leather.

[0027] Due to the thermoplasticity of the TPU base layer, only local melting or chemical bond breakage occurs during the formation of the laser-engraved pattern. After melting, it re-solidifies, thus enabling the formation of smooth laser-engraved patterns on the TPU base layer, giving the synthetic leather rich layers and a good visual effect.

[0028] In addition, the flexibility and elasticity of the TPU base layer enable it to tightly bond with various shell materials such as plastic, metal, and glass when used to manufacture composite shells for electronic devices. This effectively overcomes the problems of edge wrinkles and easy delamination caused by poor bonding of traditional base fabrics such as polyester cloth and fiberglass cloth, and greatly improves the structural stability of the composite shell. Attached Figure Description

[0029] Figure 1 A schematic cross-sectional view of a synthetic leather provided as an example of this application;

[0030] Figure 2 A top view of a synthetic leather provided as an example in this application;

[0031] Figure 3 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0032] Figure 4 A cross-sectional structural schematic diagram of synthetic leather provided as another example of this application;

[0033] Figure 5 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0034] Figure 6 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0035] Figure 7 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0036] Figure 8 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0037] Figure 9 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0038] Figure 10 A cross-sectional structural diagram of synthetic leather provided as another example of this application;

[0039] Figure 11 This is a schematic diagram of the structure of an electronic device housing provided as an example of this application.

[0040] In the diagram, 1 is the outer casing of an electronic device; 10 is synthetic leather; 20 is the base material layer; 100 is the TPU base layer; 200 is the PU layer; 110 is the laser pattern; 210 is the laser engraving; 300 is the foam layer; 400 is the barrier layer; 500 is the surface layer; 600 is the surface treatment layer; and 700 is the tactile layer. Detailed Implementation

[0041] The following detailed description, in conjunction with specific embodiments, provides a more complete and clear account of the synthetic leather, electronic device housing, and their preparation method according to this invention. This invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0042] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In this utility model, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0046] See Figure 1 and Figure 2 This utility model provides a synthetic leather 10, comprising:

[0047] TPU base layer 100, with a laser pattern 110 formed on one side surface;

[0048] A PU layer 200 is disposed on one side surface of the TPU base layer 100 on which a laser pattern 110 is formed; a laser groove 210 corresponding to the laser pattern 110 is formed on the PU layer 200; along the thickness direction of the synthetic leather 10, the orthogonal projection of the laser pattern 110 toward the PU layer 200 falls into the laser groove 210.

[0049] This invention features a PU layer 200 on a TPU base layer 100. The resulting synthetic leather 10 combines the high strength, high elasticity, soft touch, and good weather resistance of TPU, thereby enhancing its practicality and application range. A laser pattern 110 is formed on the TPU base layer 100. Due to the thermoplasticity of the TPU material in the base layer, the TPU material partially melts during the formation of the laser pattern 110, and then re-solidifies. Therefore, a smooth laser-engraved pattern 110 can be formed on the TPU base layer 100, giving the synthetic leather 10 rich layers and a good visual effect. Furthermore, the laser pattern 110 on one side of the TPU base layer 100 complements the corresponding laser engravings 210 on the PU layer 200, resulting in a strong three-dimensional effect, unique visual appeal, and a rich texture.

[0050] In addition, the flexibility and elasticity of the TPU base layer 100 enable it to tightly bond with various shell materials such as plastic, metal, and glass when used to manufacture composite shells for electronic devices. This effectively overcomes the problems of edge wrinkles and easy delamination caused by poor bonding of traditional base fabrics such as polyester cloth and fiberglass cloth, and greatly improves the structural stability of the composite shell.

[0051] In one example, the TPU base layer 100 is one or more layers.

[0052] In one example, when the TPU base layer 100 is multilayered, the TPU base layer 100 includes a first sublayer, ..., and an Nth sublayer stacked along a direction away from the PU layer 200; N is a positive integer ≥ 2. For example, the value of N includes, but is not limited to, 2, 3, 4, 5, 6, 7, 8, 9, or 10.

[0053] In one example, when the TPU substrate 100 is multilayered, at least the first sublayer of the TPU substrate 100 has a laser-engraved pattern 110 formed on it. Understandably, to be compatible with the laser engraving process, the first sublayer of the TPU substrate 100 closest to the PU layer 200 first forms the laser-engraved pattern 110.

[0054] In one example, when the TPU substrate 100 is multilayered, multiple laser patterns 110 are formed independently in each sublayer of the TPU substrate 100.

[0055] In one example, in two adjacent sublayers, the size of the laser pattern 110 of the sublayer closer to the PU layer 200 is not smaller than the size of the laser pattern 110 of the sublayer farther from the PU layer 200. Understandably, to accommodate the laser engraving process, in the TPU substrate layer 100, the size of the laser pattern 110 of the first sublayer closer to the PU layer 200 is not smaller than the size of the laser pattern 110 of the sublayer farther from the PU layer 200.

[0056] See Figure 3 In one example, when the TPU substrate 100 is multilayered, laser patterns 110 are formed on each sublayer of the TPU substrate 100.

[0057] In one example, when the TPU substrate 100 is multi-layered, the sublayers forming multiple laser patterns 110 may be independently identical or different. Understandably, the sublayers forming multiple laser patterns 110 in the TPU substrate 100 may be identical or different, meaning the depths of the laser patterns 110 may be independently identical or different. Laser engraving can reach different depths in each sublayer at different locations. See also Figure 4 Multiple laser patterns 110 are independently formed in each sublayer of the TPU base layer 100.

[0058] See Figure 5 In one example, multiple laser patterns 110 are each independently formed in each sublayer of the TPU substrate layer 100; and the size of the laser pattern 110 in the sublayer closer to the PU layer 200 is not smaller than the size of the laser pattern 110 in the sublayer farther from the PU layer 200.

[0059] In this invention, the laser-engraved pattern 110 is formed on the TPU base layer 100. The thermoplasticity of TPU causes only localized melting of the surface of the TPU base layer 100. After cooling, the molten material on its surface re-solidifies, thus forming a smooth laser-engraved pattern 110. When the TPU base layer 100 is multi-layered and each sub-layer forms a laser pattern 110, and the size of the laser pattern 110 of the sub-layer closer to the PU layer 200 is not smaller than that of the sub-layer farther from the PU layer 200, such as... Figure 5 In this process, laser-engraved patterns can be independently formed on different sub-layers. Through the progressive design of the multi-layered patterns, a stronger sense of depth and three-dimensionality can be achieved in the thickness direction of the synthetic leather 10. Specifically, the smaller patterns at the bottom serve as base details, while the larger patterns on top form the main visual element, giving the laser-engraved patterns a three-dimensional appearance. Furthermore, the formation of the laser-engraved patterns 110 in each sub-layer conforms to the sequence of laser engraving processes, offering advantages such as ease of preparation and suitability for industrial production. Simultaneously, the multi-layered TPU structure enhances interlayer adhesion through nested dimensions, preventing damage to the laser-engraved patterns 110 due to the breakage of a single TPU base layer 100, thus improving both decorative appeal and structural stability.

[0060] In one example, in the TPU substrate 100, at least two adjacent sublayers have different color development properties.

[0061] Understandably, color rendering refers to any one of color, pearlescent properties, thermochromic properties, and fluorescence.

[0062] In one example, when the TPU substrate 100 has multiple layers, the weight proportions of color masterbatch and / or pearl powder and / or thermochromic pigment and / or rare earth phosphor in the TPU masterbatch used to prepare each sublayer of the TPU substrate 100 are different.

[0063] In another example, when the TPU substrate 100 has multiple layers, the TPU masterbatch used to prepare each sublayer of the TPU substrate 100 contains different types of color masterbatch and / or pearlescent powder and / or thermochromic pigment and / or rare earth phosphor.

[0064] There are obvious differences in color rendering in the multi-layer structure of the TPU substrate 100. At this time, the laser-engraved pattern 110 set on the TPU substrate 100 has high recognition and the TPU substrate 100 can achieve the effect of multi-color gradient or multi-layer color rendering, thereby ensuring the visual effect and improving the sense of layering.

[0065] In one example, the TPU base layer 100 is any one of a polyester polyurethane layer, a polyether polyurethane layer, and an aliphatic polyurethane layer.

[0066] In one example, the Shore hardness of the TPU substrate 100 is 60A to 90A. For example, the Shore hardness of the TPU substrate 100 includes, but is not limited to, 60A, 65A, 70A, 75A, 80A, 85A or 90A, or any two of the above point values ​​as endpoint values.

[0067] The aforementioned Shore hardness TPU base layer 100 better maintains its structure during the formation of the laser-engraved pattern 110, effectively avoiding pattern defects caused by excessive hardness making engraving difficult, or pattern edge melting and deformation caused by excessive softness. It also reduces imperfections such as burrs and serrations, ensuring a complete and accurate pattern presentation. Simultaneously, the Shore hardness TPU base layer 100 can also adjust the pressing feel of the entire synthetic leather 10, enhancing the user experience.

[0068] In one example, the antibacterial rate of the TPU base layer 100 is not less than 90%.

[0069] The TPU base layer 100 has antibacterial properties. On the one hand, it provides a continuous antibacterial environment for the synthetic leather 10, which helps inhibit the growth and reproduction of bacteria on the entire synthetic leather 10. On the other hand, when the TPU base layer 100 can effectively ensure that the synthetic leather 10 has antibacterial properties, it is possible to avoid adding antibacterial agents to other surface functional layers such as the PU layer 200, thereby avoiding performance degradation problems such as reduced gloss and damage to the waterproof structure caused by the addition of antibacterial agents to the surface functional layers.

[0070] In one example, the flame retardancy of the TPU substrate 100 is no less than UL94V2.

[0071] Understandably, to make the TPU base layer 100 flame-retardant, flame retardants can be added to the raw materials used in the preparation of the TPU base layer 100. The flame-retardant nature of the TPU base layer 100 ensures the flame retardancy of the overall synthetic leather 20, while also preventing performance degradation such as reduced flexibility and scratch resistance that would result from flame-retardant PU layer 200 and other surface functional layers.

[0072] In one example, the thickness of the TPU substrate 100 is 0.1 mm to 0.4 mm. In this invention, since the laser-engraved pattern is formed on one side surface of the TPU substrate 100, the thickness of the TPU substrate 100 plays a crucial role in preventing abnormal energy penetration and excessive material ablation during the laser engraving process, and in ensuring the integrity of the laser-engraved pattern. For example, the thickness of the TPU substrate 100 includes, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, or 0.4 mm, or any two of the above values ​​as endpoints.

[0073] In one example, the thickness of the synthetic leather 10 is 0.2 mm to 0.6 mm. A thickness between 0.2 mm and 0.6 mm ensures that the synthetic leather 10 possesses good flexibility and fit, while also controlling costs and reducing the overall weight of the product while maintaining strength and durability. For example, the thickness of the synthetic leather 10 may include, but is not limited to, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm, or any two of the above values ​​as endpoints.

[0074] In one example, the synthetic leather further includes a functional layer. The functional layer includes at least one of a foam layer 300, a barrier layer 400, a surface layer 500, a surface treatment layer 600, and a tactile layer 700.

[0075] Each of the aforementioned functional layers is independently disposed on the side of the PU layer 200 facing away from the TPU base layer 100, or between the PU layer 200 and the TPU base layer 100; and laser engravings 210 corresponding to the laser pattern 110 are formed on the functional layers.

[0076] Understandably, the materials of the foaming layer, barrier layer, surface layer, surface treatment layer, and tactile layer are not limited in this utility model, as long as they can achieve the corresponding functions of buffering, barrier, decoration, tactile optimization, or surface protection.

[0077] For example, the material of the foam layer includes, but is not limited to, foamed polyurethane resin. Further for example, the foamed polyurethane resin includes, but is not limited to, polyester polyurethane, polyether polyurethane, or polycarbonate polyurethane.

[0078] For example, the material of the barrier layer includes, but is not limited to, barrier polyurethane resin. Further for example, the barrier polyurethane resin includes, but is not limited to, acrylate-modified polyurethane barrier resin or polycarbonate-type barrier polyurethane resin.

[0079] For example, the material of the surface layer includes, but is not limited to, surface polyurethane resin. Further, the raw materials for preparing the surface layer include polyurethane prepolymer, vinyl-terminated polysiloxane, hydrogen-containing polysiloxane, reaction inhibitor, catalyst, silica, cyclic siloxane, polyisocyanate curing agent, and compatibilizer. The polyurethane prepolymer is obtained by reacting polyols, hydroxyl-terminated polysiloxanes, and polyisocyanates. Appropriate hardness, softness, and tactile feel of the surface layer can simulate the texture of natural leather, improving the quality of synthetic leather. Understandably, this application does not limit the color of the surface layer; the surface layer can be any color as needed.

[0080] For example, the material of the surface treatment layer includes, but is not limited to, water-based aromatic polyurethane resin. As a further example, the type of water-based aromatic polyurethane resin includes, but is not limited to, KTT728-7A. The surface treatment layer 600 effectively maintains the cleanliness and aesthetics of the synthetic leather 10 surface, while improving stain resistance and ease of cleaning.

[0081] For example, the materials of the tactile layer include, but are not limited to, polyurethane, silicone, and polyolefin. Synthetic leather 10 containing the tactile layer 700 has the advantages of being soft and smooth, highly elastic, weather-resistant, and stain-resistant, significantly improving its texture and lifespan. See also... Figure 6 In one example, the functional layer includes a foam layer 300 and a barrier layer 400. The foam layer 300 and the barrier layer 400 are disposed between the TPU substrate layer 100 and the PU layer 200, with the foam layer 300 being disposed closer to the TPU substrate layer 100.

[0082] See Figure 7 In one example, the functional layer includes a surface treatment layer 600. The surface treatment layer 600 is disposed on the surface of the PU layer 200 facing away from the TPU substrate layer 100. Understandably, the surface treatment layer 600 is a protective layer.

[0083] See Figure 8 In one example, the functional layer includes a foam layer 300, a barrier layer 400, and a surface treatment layer 600. The foam layer 300 and the barrier layer 400 are disposed between the TPU substrate layer 100 and the PU layer 200, with the foam layer 300 positioned closer to the TPU substrate layer 100. The surface treatment layer 600 is disposed on the surface of the PU layer 200 facing away from the TPU substrate layer 100.

[0084] See Figure 9 In one example, the functional layer includes a surface treatment layer 600 and a tactile layer 700. The surface treatment layer 600 and the tactile layer 700 are disposed on the side of the PU layer 200 opposite to the TPU substrate layer 100, with the tactile layer 700 disposed closer to the PU layer 200.

[0085] See Figure 10In one example, the functional layers include a foam layer 300, a barrier layer 400, a surface treatment layer 600, and a tactile layer 700. The foam layer 300 and the barrier layer 400 are disposed between the TPU base layer 100 and the PU layer 200, with the foam layer 300 positioned closer to the TPU base layer 100. The surface treatment layer 600 and the tactile layer 700 are disposed on the surface of the PU layer 200 facing away from the TPU base layer 100, with the tactile layer 700 positioned closer to the PU layer 200.

[0086] Understandably, when the synthetic leather also includes at least one functional layer among the foam layer, barrier layer, surface layer, surface treatment layer and touch layer, each functional layer also has laser engraving marks that correspond to the laser engraving pattern of the TPU base layer, and the orthogonal projection of the laser pattern 110 toward the functional layer falls into the laser engraving mark 210.

[0087] The present invention also provides an electronic device housing 1, comprising synthetic leather 10 prepared by the preparation method of any of the above examples of the present invention and a substrate layer 20, wherein the TPU substrate layer 100 is disposed close to the substrate layer 20.

[0088] In one example, the substrate layer 20 is any one of a plastic layer, a fiber-reinforced composite layer, a glass layer, or a metal layer.

[0089] See Figure 11 In one example, the electronic device housing 1 includes:

[0090] TPU base layer 100, with a laser pattern 110 formed on one side surface;

[0091] A PU layer 200 is disposed on one side surface of the TPU base layer 100 on which a laser pattern 110 is formed; a laser groove 210 corresponding to the laser pattern 110 is formed on the PU layer 200; along the thickness direction of the electronic device housing 1, the orthographic projection of the laser pattern 110 toward the PU layer 200 falls into the laser groove 210.

[0092] The substrate layer 20 is disposed on the side surface of the TPU substrate layer 100 opposite to the PU layer 200.

[0093] This utility model also provides a method for preparing an electronic device housing 1, comprising the following steps:

[0094] The synthetic leather 10 prepared by any of the examples of the first aspect of this utility model is laminated with the substrate layer 20, wherein the lamination method includes one or more of adhesive bonding, hot pressing and injection molding.

[0095] In one example, the substrate layer 20 is any one of a plastic layer, a fiber-reinforced composite layer, a glass layer, or a metal layer.

[0096] As a further example, the synthetic leather 10 is bonded to the plastic by adhesive bonding or injection molding.

[0097] The polarity of the TPU base layer 100 is similar to that of plastic, so a high-strength bond can be achieved through adhesive bonding, and its interfacial bonding strength is superior to that of traditional textile base layers.

[0098] Alternatively, injection molding can be used to combine TPU and thermoplastic elastomer TPE with synthetic leather 10. In this case, synthetic leather 10 can be used as a pre-installed insert, directly bonded to molten TPU or TPE material in the injection mold to form an integrated, seamless structure.

[0099] As a further example, the composite method of synthetic leather 10 and fiber-reinforced composite material layer is hot pressing. The TPU base layer 100 has excellent elastic recovery capabilities, softening within the range of 120~180℃. This facilitates integral curing with epoxy / glass fiber prepreg via hot pressing, and the TPU base layer 100 can quickly set after cooling, shortening the production cycle. Simultaneously, the finished electronic device casing prepared by hot pressing exhibits good dimensional stability, is easy to CNC cut, and effectively avoids problems such as fuzzing.

[0100] The examples described above merely illustrate several embodiments of this utility model to facilitate a detailed understanding of its technical solutions, but should not be construed as limiting the scope of protection of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided by this utility model through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this utility model patent should be determined by the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A synthetic leather, characterized in that, include: The TPU base layer (100) has a laser pattern (110) formed on one side surface. A PU layer (200) is disposed on one side surface of the TPU base layer (100) on which the laser pattern (110) is formed; a laser engraving (210) corresponding to the laser pattern (110) is formed on the PU layer (200); along the thickness direction of the synthetic leather (10), the orthographic projection of the laser pattern (110) toward the PU layer (200) falls into the laser engraving (210).

2. The synthetic leather according to claim 1, characterized in that, The TPU base layer (100) may be one or more layers; When the TPU base layer (100) is multilayered, each sublayer of the TPU base layer (100) is stacked along the thickness direction of the synthetic leather (10).

3. The synthetic leather according to claim 2, characterized in that, When the TPU substrate layer (100) is multilayered, the plurality of laser patterns (110) are each independently formed in each sublayer of the TPU substrate layer (100); In two adjacent sublayers, the size of the laser pattern (110) of the sublayer closer to the PU layer (200) is not less than the size of the laser pattern (110) of the sublayer farther away from the PU layer (200).

4. The synthetic leather according to claim 3, characterized in that, In the TPU base layer (100), at least two adjacent sublayers have different color development properties.

5. The synthetic leather according to any one of claims 1 to 4, characterized in that, The TPU base layer (100) is any one of polyester polyurethane layer, polyether polyurethane layer and aliphatic polyurethane layer; And / or, the Shore hardness of the TPU substrate (100) is 60A to 90A; And / or, the antibacterial rate of the TPU base layer (100) is not less than 90%; And / or, the flame retardancy of the TPU base layer (100) is not less than UL94V2 level.

6. The synthetic leather according to any one of claims 1 to 4, characterized in that, The thickness of the TPU base layer (100) is 0.1mm~0.4mm; And / or, the thickness of the synthetic leather (10) is 0.2 mm to 0.6 mm.

7. The synthetic leather according to any one of claims 1 to 4, characterized in that, The synthetic leather further includes a functional layer, which includes at least one of a foam layer (300), a barrier layer (400), a surface layer (500), a surface treatment layer (600), and a tactile layer (700); Each of the functional layers is independently disposed on the side surface of the PU layer (200) facing away from the TPU base layer (100), or between the PU layer (200) and the TPU base layer (100); and each functional layer has laser engravings (210) corresponding to the laser pattern (110).

8. An electronic device housing, characterized in that, It includes synthetic leather (10) and a base layer (20), wherein the synthetic leather (10) is the synthetic leather (10) according to any one of claims 1 to 7; The TPU base layer (100) is disposed close to the substrate layer (20).

9. The electronic device housing according to claim 8, characterized in that, The substrate layer (20) is any one of a plastic layer, a fiber-reinforced composite material layer, a glass layer, or a metal layer.

10. The electronic device housing according to claim 8, characterized in that, The synthetic leather (10) is bonded to the substrate layer (20) by one or more of the following methods: adhesive bonding, hot pressing and injection molding.

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