Shell preparation method, shell and electronic equipment

Abstract

This application discloses a method for preparing a housing, a housing, and an electronic device, belonging to the field of communication equipment technology. The preparation method comprises: preparing an organic silicone layer, superimposing and affixing the organic silicone layer onto a base fabric layer to form a leather layer, and superimposing and affixing the leather layer onto a housing body to form the housing, wherein the organic silicone layer is located on the side of the base fabric layer facing away from the housing body. This solution can solve the problem in related technologies where the leather layer of a leather housing is easily contaminated.

Description

Technical Field

[0001] The present application belongs to the technical field of communication equipment, and specifically relates to a method for preparing a shell, a shell, and an electronic device. Background Art

[0002] Plain leather cases are popular with users due to their excellent hand feel. The leather layer of plain leather cases in related technologies is made of PU (polyurethane) imitation leather material, which consists of a PU resin coating and a fiber-based fabric layer. Due to the poor anti-fouling ability of polyurethane materials, plain leather cases tend to become more contaminated after a period of use, affecting the user experience. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a method for preparing a shell, a shell, and an electronic device, which can solve the problem in the related art that the plain leather layer of the plain leather shell is easily dirty.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, the present invention discloses a method for preparing a shell, comprising:

[0006] preparing an organic silica gel layer;

[0007] The organic silica gel layer is stacked and fixed on the base fabric layer to form a plain leather layer;

[0008] The plain leather layer is stacked and fixed on the shell body to form the shell, wherein the organic silicone layer is located on the side of the base fabric layer away from the shell body.

[0009] In a second aspect, the present invention also discloses a shell, which is prepared by the above-mentioned preparation method, and the shell includes a plain leather layer and a shell body, wherein: the plain leather layer includes an organic silicone layer and a base fabric layer that are stacked and connected, the plain leather layer is stacked and connected to the shell body, and the organic silicone layer is located on the side of the base fabric layer away from the shell body.

[0010] In a third aspect, the present invention further discloses an electronic device comprising the above-mentioned housing.

[0011] In the embodiments of the present application, the organic silicone layer is made of an organic silicone material, which has excellent hydrophobic and oleophobic properties, giving the organic silicone layer good anti-fouling properties. The organic silicone layer is located on the side of the base fabric layer facing away from the shell body, so that the organic silicone layer forms part of the outer surface of the shell. The organic silicone layer has good anti-fouling properties, which can improve the anti-fouling properties of the plain leather layer and alleviate the problem that the plain leather layer is easily contaminated. Therefore, the present application can solve the problem of the plain leather layer of the plain leather shell being easily contaminated in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a flow chart of the method for preparing a shell disclosed in an embodiment of the present application;

[0013] Figure 2 This is a flow chart of preparing an organic silica gel layer disclosed in the examples of this application;

[0014] Figure 3 This is a flow chart of stacking and fixing the plain leather layer on the shell body to form a shell according to an embodiment of the present application;

[0015] Figure 4 This is a flow chart of installing a logo insert on a shell body according to an embodiment of the present application;

[0016] Figure 5 Flow chart for preparing the plain cortex disclosed in the application examples;

[0017] Figure 6 This is a schematic diagram of the structure of the plain cortex disclosed in the examples of this application;

[0018] Figure 7 This is a flowchart of partially preparing a shell having a plain skin layer formed by splicing multiple prefabricated plain skin layers disclosed in the embodiments of this application;

[0019] Figure 8 This is a structural schematic diagram of a housing with a first appearance effect disclosed in an embodiment of the present application;

[0020] Figure 9 This is a schematic structural diagram of a shell having a plain skin layer formed by splicing multiple prefabricated plain skin layers disclosed in an embodiment of the present application;

[0021] Figure 10 This is a flow chart for preparing a plain cortex layer with a first identifier disclosed in an embodiment of the present application;

[0022] Figure 11 A flowchart of a portion of the preparation of a housing with a first mark disclosed in an embodiment of the present application;

[0023] Figure 12 This is a schematic structural diagram of a housing with a second appearance effect disclosed in an embodiment of the present application;

[0024] Figure 13 This is a schematic structural diagram of a housing with a logo inlay disclosed in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 100-plain leather layer, 110-organic silicone layer, 111-anti-fouling layer, 112-wear-resistant layer, 113-main body layer, 120-base fabric layer, 130-prefabricated plain leather layer,

[0027] 200-shell body,

[0028] 310-first logo, 320-second logo, 330-Logo inlay,

[0029] 410-first hot melt adhesive layer, 420-second hot melt adhesive layer,

[0030] 500-Release paper. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0032] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0033] Please refer to Figures 1 to 13 The present invention discloses a method for preparing a housing. The housing prepared in this manner can be applied to electronic devices, such as battery covers of electronic devices. The disclosed preparation method includes the following steps:

[0034] S101, preparing an organic silica gel layer 110.

[0035] The organic silicone layer 110 is made of an organic silicone material. The organic silicone material has a relatively weak polarity and excellent hydrophobicity and oleophobicity, thereby making the organic silicone layer 110 have a good anti-fouling performance.

[0036] S102 , stacking and fixing the organic silicone layer 110 on the base fabric layer 120 to form the base leather layer 100 .

[0037] The base fabric layer 120 can be made of many materials, such as polyester non-woven fabric. Polyester non-woven fabric has a lower cost and can reduce the cost of the shell. Of course, the base fabric layer 120 can also be microfiber base fabric or other fiber base fabric. This application does not limit the specific material of the base fabric layer 120.

[0038] S103 , stacking and fixing the plain leather layer 100 on the shell body 200 to form a shell, wherein the organic silicone layer 110 is located on a side of the base fabric layer 120 facing away from the shell body 200 .

[0039] The organic silicone layer 110 is located on the side of the base fabric layer 120 facing away from the shell body 200, so that the organic silicone layer 110 forms at least a portion of the outer surface of the shell, thereby enhancing the shell's anti-fouling properties. The leather layer 100 formed by the organic silicone layer 110 and the base fabric layer 120 is an organic silicone imitation leather material, which has a good feel and can enhance the feel of the shell. The shell body 200 can be a plastic shell, of course, the shell body 200 can also be made of other materials. This application does not limit the specific material of the shell body 200.

[0040] In the embodiment of the present application, the organic silicone layer 110 is made of an organic silicone material, which has excellent hydrophobic and oleophobic properties, giving the organic silicone layer 110 good anti-fouling performance. The organic silicone layer 110 is located on the side of the base fabric layer 120 facing away from the shell body 200, so that the organic silicone layer 110 forms part of the outer surface of the shell. The good anti-fouling performance of the organic silicone layer 110 can improve the anti-fouling performance of the plain leather layer 100 and alleviate the problem that the plain leather layer 100 is easily contaminated. As can be seen, the present application can solve the problem of the plain leather layer of the plain leather shell being easily contaminated in the related art.

[0041] In addition, the organic silicone layer 110 in the embodiment of the present application is also resistant to chemical solvents and aging, and the organic silicone material has excellent resilience after cross-linking, which can further improve the feel of the shell.

[0042] PU imitation leather materials used in related art are polyurethanes, typically made from isocyanates, macromolecular polyols, and small-molecule diols. Isocyanates polymerize with macromolecular polyols to form multi-branched segments, which serve as soft segments to impart flexibility to the polymer. Isocyanates polymerize with short-chain diols to form linear segments, which serve as hard segments to impart rigidity to the polymer. Currently, PU imitation leather materials are primarily produced using a wet process, primarily synthesized using aromatic isocyanates. To achieve superior mechanical properties, aromatic isocyanate MDI is often used. This is susceptible to conjugation effects and π-π electron transitions under the influence of ultraviolet radiation, hand sweat unsaturated enzymes, and sebaceous acid. Therefore, additives such as light stabilizers, antioxidants, and UV absorbers are typically added during the synthesis process. While these additives can improve the polymer's resistance to yellowing to a certain extent, they cannot completely prevent yellowing. Polyurethane is a polymer material synthesized from isocyanate, macromolecular polyol and small molecular diol. When polyurethane material is used in the casing of electronic equipment, the UV glue and other organic solvents used in the screen film of the electronic equipment are all good solvents for polyurethane material, which can easily cause the PU resin coating and the fiber-based fabric layer to separate, affecting the appearance and feel of the casing.

[0043] In the embodiment of the present application, the raw materials used for the silicone imitation leather material generally include linear polysiloxane, and all the chemical groups are symmetrical methyl groups. According to its performance requirements, other functional groups can be grafted on the methyl groups of its main chain to improve performance, such as polyacrylate-modified phenyl silicone resin, which has higher strength and rigidity and improves the wear resistance of the silicone imitation leather material; the main chain of the linear polysiloxane molecular chain is composed of Si-O bonds. Compared with PU imitation leather materials, its molecular chain segments are longer and more flexible, making the material have excellent flexibility and breathability; its Si-O bond energy is high , large bond angle (445kJ / mol, 137°), more stable than polyurethane (C-C bond energy 346kJ / mol, C-O bond energy 356kJ / mol, bond angle 110°), chemical bonds are not easily destroyed, so the material has good heat resistance and weather resistance in chemical environments such as high temperature, UV, thermal oxygen, and organic solvents; its molecular chains are arranged in a spiral shape, with the methyl groups in the molecular chains facing outward, completely wrapping the silicon oxygen segments in the main chain of the molecular chain; the outward-facing methyl segments have weak polarity and low surface energy, which makes the silicone material have extremely excellent hydrophobicity, oleophobicity, and anti-fouling properties.

[0044] Compared with PU imitation leather materials, the plain leather layer 100 in the embodiment of the present application has better anti-fouling performance and better environmental stability, which can reduce the risk of yellowing and aging of the shell; the plain leather layer 100 is flame retardant. When the shell in the embodiment of the present application is used in electronic equipment, the safety performance of components such as batteries of the electronic equipment can be improved; the plain leather layer 100 has good chemical stability, which can alleviate the problem of PU imitation leather materials being corroded and peeling by UV glue; the production process of the plain leather layer 100 is relatively low-carbon and environmentally friendly.

[0045]

[0046]

[0047] Table 1 Molecular comparison of silicone and polyurethane materials

[0048]

[0049] Table 2 Comparison of test performance of silicone imitation leather materials and polyurethane imitation leather materials

[0050] As shown in Tables 1 and 2, the dirt resistance, aging resistance and chemical resistance of silicone imitation leather materials are better than those of polyurethane imitation leather materials.

[0051] The steps of preparing the organic silica gel layer 110 include:

[0052] S201 , coating a first organic silicone material on the surface of the coating base layer to form an anti-fouling layer 111 .

[0053] The coating base layer can be release paper 500. The thickness of the anti-fouling layer 111 can be 5-15 μm. After coating the first organic silicone material, the first organic silicone material can be thermally cured in a tunnel oven to obtain a cured anti-fouling layer 111. The curing temperature can be 130±10°C and the curing time can be 90±30 seconds. Of course, other equipment can also be used to thermally cure the first organic silicone material. The curing temperature and curing time can be adjusted according to actual needs. The anti-fouling layer 111 has good anti-fouling effect, yellowing resistance, and chemical solvent resistance.

[0054] S202 , coating a second organic silicone material on the surface of the anti-fouling layer 111 to form a wear-resistant layer 112 .

[0055] The thickness of the wear-resistant layer 112 can be 30-50 μm. After applying the second organic silicone material, the second organic silicone material can be thermally cured in a tunnel oven to obtain a cured wear-resistant layer 112. The curing temperature can be 130±10°C, and the curing time can be 90±30 seconds. Of course, other equipment can also be used to thermally cure the second organic silicone material. The curing temperature and curing time can be adjusted according to actual needs. The wear-resistant layer 112 has good wear resistance.

[0056] S203 , coating a third organic silicone material on the surface of the wear-resistant layer 112 to form a main body layer 113 .

[0057] The thickness of the main layer 113 can be 100-150 μm. After coating with the third organic silicone material, the third organic silicone material can be thermally cured in a tunnel oven to obtain a cured main layer 113. The curing temperature can be 150±5°C and the curing time can be 180±30 seconds. The main layer 113 can ensure the mechanical properties of the organic silicone layer 110, such as tear strength, flexibility, and bonding strength, so that the organic silicone layer 110 has good mechanical properties.

[0058] S204 , removing the coating base layer to obtain the organic silica gel layer 110 .

[0059] Specifically, a winder may be used to separate the coating base layer from the surface of the anti-fouling layer 111 , and the speed of the winder may be 10±1 m / min.

[0060] After the coating base layer is separated, a winding machine may be used to package the organic silicone layer 110 into a fixed size.

[0061] In the above scheme, the organic silicone layer 110 is stacked and fixed on the base fabric layer 120 to form the plain leather layer 100. Specifically, the main body layer 113 is stacked and connected to the base fabric layer 120, the wear-resistant layer 112 is located on the side of the main body layer 113 away from the base fabric layer 120, and the anti-fouling layer 111 is located on the side of the wear-resistant layer 112 away from the main body layer 113.

[0062] In this case, the anti-fouling layer 111, the wear-resistant layer 112 and the main layer 113 are different functional layers. The anti-fouling layer 111 has an anti-fouling function, the wear-resistant layer 112 has a wear-resistant function, and the main layer 113 is used to ensure that the organic silicone layer 110 has good tear strength, flexibility and bonding force, so that the organic silicone layer 110 has the above-mentioned multiple properties.

[0063] In the above scheme, after preparing the organic silicone layer 110, the organic silicone layer 110 is stacked and fixed on the base fabric layer 120 to form the plain leather layer 100. The organic silicone layer 110 is an organic silicone material. Since the organic silicone material has hydrophobic and oleophobic properties, there is no chemical reaction between the organic silicone layer 110 and the base fabric layer 120 during the cross-linking process of the organic silicone material, so that the bonding force between the organic silicone layer 110 and the base fabric layer 120 is relatively weak.

[0064] To this end, in the embodiment of the present application, in the above steps, the organic silicone layer 110 is stacked and fixed on the base fabric layer 120 to form the plain leather layer 100, which may include:

[0065] Step A1: coating silicone glue or silane coupling agent on the base fabric layer 120 .

[0066] Before applying the third organic silicone material, silicone glue or a silane coupling agent may be applied to the base fabric layer 120 to pre-treat the base fabric layer 120. Of course, silicone glue or a silane coupling agent may also be applied to the base fabric layer 120 after applying the third organic silicone material. This application does not limit the order of applying the silicone glue or the silane coupling agent.

[0067] Step A2: After the third organic silicone material is coated on the surface of the wear-resistant layer 112 and before the third organic silicone material is cured, the surface of the base fabric layer 120 coated with silicone glue or silane coupling agent is stacked on the uncured third organic silicone material, and then the third organic silicone material is thermally cured to form a plain leather layer 100.

[0068] In this case, the silicone glue or silane coupling agent can chemically react with the polyester fiber and the end group of the uncured silicone material to chemically bond the polyester non-woven fabric and the silicone layer 110, thereby strengthening the molecular adhesion between the interfaces, thereby enhancing the interface adhesion between the silicone layer 110 and the base fabric layer 120, and enhancing the connection strength between the silicone layer 110 and the base fabric layer 120.

[0069] The antifouling layer 111 , the wear-resistant layer 112 and the main body layer 113 may all be mixtures, and the components of the antifouling layer 111 , the wear-resistant layer 112 and the main body layer 113 may all include a silica gel matrix, a catalyst, a cross-linking agent and a reinforcing agent.

[0070] The anti-fouling layer 111 forms part of the outer surface of the shell. The anti-fouling layer 111 has good anti-fouling effect, yellowing resistance and chemical solvent resistance. The degree of intermolecular cross-linking is relatively high. At the same time, in order to ensure a good hand feel experience, the reinforcing agent can be appropriately reduced. In the embodiment of the present application, the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent in the anti-fouling layer 111 can be 200:1:80:40.

[0071] The wear-resistant layer 112 serves as an intermediate transition layer and has good wear resistance. At the same time, in order to improve the adhesion and bonding performance between the anti-fouling layer 111 and the main layer 113, its reinforcing agent can be relatively increased. Therefore, in the embodiment of the present application, the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent in the wear-resistant layer 112 can be 250:1:75:60.

[0072] The main layer 113 is used to ensure the overall mechanical properties of the organic silicone layer 110, such as tear strength, flexibility, bonding strength, etc., and the main layer 113 is connected to the base fabric layer 120. In order to make the main layer 113 have good wettability to the base fabric layer 120, it can infiltrate the base fabric layer 120 and enhance the interfacial molecular bonding performance between the organic silicone layer 110 and the base fabric layer 120. The content of the silicone matrix can be increased to ensure the degree of intermolecular cross-linking. In the embodiment of the present application, the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent in the main layer 113 can be 300:1:75:40.

[0073] It should be noted that the ratios in this article are mass ratios.

[0074] In this case, by changing the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent, an organic silicone functional layer with different functions can be obtained, so that the organic silicone layer 110 has both anti-fouling, yellowing resistance and chemical solvent resistance, and wear resistance, and can also ensure the mechanical properties of the organic silicone layer 110, such as tear strength, flexibility and bonding strength.

[0075] The silica gel matrix can be a mixture, and the formula of the silica gel matrix can include branched vinyl silicone oil (20-30 parts), siloxane (1-1.2 parts), polyacrylate modified phenyl silicone resin (5-7 parts), etc. The ratio of each component in the silica gel matrix can be adjusted according to the specific performance requirements. The catalyst can be a single-component platinum catalyst, the cross-linking agent can be a mixture, and the formula of the cross-linking agent can include hydrogen-containing silicone oil (30-50 parts) and a silane coupling agent (2-4 parts), the reinforcing agent can be white carbon black, and the toner (see below) can be an organic small molecule dye. It should be noted that the parts in this application refer to parts by mass, and the parts in the ratio also refer to parts by mass.

[0076] In a further technical solution, the anti-fouling layer 111 forms part of the outer surface of the shell. In order to adjust the appearance of the shell, the components of the anti-fouling layer 111 can also include matting powder. By controlling the added percentage of matting powder, the surface glossiness of the organic silicone layer 110 can be adjusted, thereby adjusting the appearance of the shell. For example, the higher the content of matting powder in the components of the anti-fouling layer 111, the lower the surface glossiness of the organic silicone layer 110, and the dumber the appearance of the shell.

[0077] In a further technical solution, one or more of the components of the anti-fouling layer 111, the wear-resistant layer 112, and the main body layer 113 may further include a colorant. The colorant may be a color paste, and the amount of colorant in the anti-fouling layer 111, the wear-resistant layer 112, and the main body layer 113 may be adjusted according to specific needs. In this case, by adding a colorant, the color of the plain leather layer 100 or the color of a portion of the plain leather layer 100 can be adjusted to enhance the aesthetics of the plain leather layer 100, thereby providing the housing with a more colorful appearance and thus improving the housing's aesthetics.

[0078] In the related art, in order to improve the aesthetics of the shell, after the PU imitation leather material is formed, polyurethane silk screen ink is usually used to form a specific pattern on the surface of the PU imitation leather material through silk screen printing. The silicone material in this application has hydrophobic and oleophobic properties. The paints and inks used in commonly used spraying, silk screen printing and other processes cannot adhere to the surface of the silicone layer 110. Therefore, in the embodiment of the present application, after the plain leather layer 100 is formed, it is difficult to design a pattern on the plain leather layer 100 using paints and inks used in commonly used spraying, silk screen printing and other processes. This undoubtedly limits the appearance expression and diversified presentation of the shell.

[0079] To this end, in an optional embodiment, the first logo 310 can be silk-screened or painted on the surface of the anti-fouling layer 111 using silicone-based silk-screen ink. The first logo 310 can be located on the surface of the anti-fouling layer 111 facing away from the wear-resistant layer 112, that is, the first logo 310 is located on the outer surface of the organic silicone layer 110, and the silicone-based silk-screen ink can adhere well to the surface of the anti-fouling layer 111, thereby enhancing the appearance of the shell.

[0080] However, due to the weak molecular polarity of the silicone material, the adhesion between the silicone-based screen printing ink and the silicone interface molecules of the anti-fouling layer 111 is weaker than the adhesion between the traditional polyurethane screen printing ink and the polyurethane resin coating molecules, and the first logo 310 is located on the surface of the anti-fouling layer 111 facing away from the wear-resistant layer 112, which will cause an interface and step difference between the first logo 310 and the anti-fouling layer 111, causing the first logo 310 to protrude from the surface of the anti-fouling layer 111 facing away from the wear-resistant layer 112, resulting in a scratchy feeling when the user uses it, and long-term use will cause the first logo 310 to be scratched and fall off.

[0081] To this end, in another optional embodiment, a first organic silicone material is coated on the surface of the coating base layer to form an anti-fouling layer 111, and after the anti-fouling layer 111 is cured, and before a second organic silicone material is coated on the surface of the anti-fouling layer 111 to form a wear-resistant layer 112, the preparation method may further include:

[0082] Step B1: Make a first logo 310 on the anti-fouling layer 111 using silicone-based silk screen ink, and the first logo 310 is located on the surface of the anti-fouling layer 111 facing the wear-resistant layer 112. That is, the first logo 310 is located between the anti-fouling layer 111 and the wear-resistant layer 112, and the area opposite to the anti-fouling layer 111 and the first logo 310 is a transparent area.

[0083] In this case, the first logo 310 can enhance the appearance of the housing and improve its aesthetics without affecting the anti-fouling properties of the silicone layer 110. The first logo 310 can be a first character or a first pattern. Furthermore, because the first logo 310 is located between the anti-fouling layer 111 and the wear-resistant layer 112, and not on the outer surface of the silicone layer 110, there is no step on the outer surface of the silicone layer 110. This avoids the problems of poor adhesion and scratch resistance of the first logo 310 on the outer surface of the silicone layer 110.

[0084] There are various ways to create the first logo 310 on the anti-fouling layer 111. For example, a screen printing device can be added between the tunnel oven used to heat-cure the anti-fouling layer 111 and the tunnel oven used to heat-cure the wear-resistant layer 112. The first logo 310 can be created by screen printing. For a better appearance, multi-colored silicone-based screen printing inks can be used to create a more colorful appearance. The first logo 310 can also be created by painting. It should be noted that this application does not impose any restrictions on the color of the silicone-based screen printing ink, nor does it impose any restrictions on the color of the first logo 310. The first logo 310 can have one or more colors.

[0085] The thickness of the first mark 310 may be 5-8 μm. The first mark 310 may be thermally cured by baking. The baking temperature may be 100±10° C., and the curing time may be 120±30 s.

[0086] Silicone-based screen printing inks require a certain degree of fluidity and do not require good mechanical properties. Therefore, a diluent can be added to the formula of silicone-based screen printing inks, and a reinforcing agent can be eliminated. The formula of silicone-based screen printing inks can include a silicone base, a catalyst, a cross-linking agent, and a diluent, and the ratio of the silicone base, catalyst, cross-linking agent, and diluent can be 300:1:70:300. In order to obtain silicone-based screen printing inks of different colors, the formula of silicone-based screen printing inks can also include a colorant. This application does not limit the ratio of the colorant in the silicone-based screen printing ink, and it can be determined based on the desired appearance effect.

[0087] In the above solution, after the organic silicone layer 110 is stacked and fixed on the base fabric layer 120 , the stacked and fixed organic silicone layer 110 and base fabric layer 120 can be cut according to a preset size to obtain the plain leather layer 100 .

[0088] In another optional embodiment, in order to improve the aesthetic performance of the shell, after the organic silicone layer 110 is stacked and fixed on the base fabric layer 120, and before the plain leather layer 100 is stacked and fixed on the shell body 200, the preparation method may further include:

[0089] Step C1: cutting the stacked organic silica gel layer 110 and the base fabric layer 120 according to a preset size to obtain a plurality of prefabricated plain skin layers 130.

[0090] Optionally, a laser cutter can be used to cut the stacked organic silicone layer 110 and the base fabric layer 120 to obtain a prefabricated plain skin layer 130 of a preset size. The speed of the laser cutter can be 90±20 mm / s and the power can be 70±20 W. Alternatively, a hydraulic press can be used to punch the stacked organic silicone layer 110 and the base fabric layer 120 into the prefabricated plain skin layer 130 of a preset size. When using the hydraulic press for cutting, a profiling jig can be used to punch the stacked organic silicone layer 110 and the base fabric layer 120. The pressure of the hydraulic press can be 0.5-0.8 MPa, and the mold closing time can be 1-1.5 seconds.

[0091] Step C2: splicing a plurality of prefabricated base layers 130 to form a base layer 100 .

[0092] The prefabricated leather layers 130 to be spliced ​​are cut with small holes using a die cutter, and two adjacent prefabricated leather layers 130 can be seamlessly spliced ​​and bonded by means of the small hole fitting method. When bonding multiple prefabricated leather layers 130, the bonding temperature can be 110±5°C, the bonding time can be 10±2s, and the bonding pressure can be 0.4±0.2MPa.

[0093] In a further technical solution, the colors of at least two preformed plain leather layers 130 can be different. In the above solution, the components of at least one of the anti-fouling layer 111, the wear-resistant layer 112 and the main layer 113 can include a colorant, and the color of the preformed plain leather layer 130 can be changed by the colorant, thereby obtaining preformed plain leather layers 130 of different colors.

[0094] The textures of at least two preformed plain skin layers 130 can differ, including texture or roughness. In the above embodiment, the anti-fouling layer 111 is formed by coating a first organic silicone material on the surface of a coating substrate, such as a release paper 500. The surface of the coating substrate can have texture. For example, the release paper 500 can have micron-level precision textures. The texture of the coating substrate, such as the release paper 500, can form textures on the surface of the anti-fouling layer 111, thereby obtaining preformed plain skin layers 130 with different textures. The texture of the preformed plain skin layer 130 can also be varied by varying the ratio of the components of the anti-fouling layer 111.

[0095] In this case, a plurality of prefabricated plain leather layers 130 can be used to obtain a plain leather layer 100 having various textures and / or various colors, thereby improving the aesthetics of the shell.

[0096] In the above solution, the step of stacking and fixing the plain leather layer 100 on the shell body 200 to form the shell may include:

[0097] S301 , coating a first hot melt adhesive layer 410 on the surface of the base fabric layer 120 facing away from the organic silicone layer 110 .

[0098] The first hot melt adhesive layer 410 is used to subsequently bond to the shell body 200, thereby improving the connection strength between the base fabric layer 120 and the shell body 200. The first hot melt adhesive layer 410 can be bonded to the base fabric layer 120 using a laminating machine. The laminating temperature of the upper belt of the laminating machine can be 145±25°C, the laminating temperature of the lower belt can be 100±20°C, and the wire drawing speed can be 2m / min.

[0099] S302 , pre-bonding the plain skin layer 100 and the shell body 200 .

[0100] A heat press can be used to pre-activate the first hot melt adhesive layer 410, first bonding the plain leather layer 100 and the shell body 200 to a portion of the area, confirming whether the plain leather layer 100 and the shell body 200 are aligned. If not, separate the plain leather layer 100 and the shell body 200, and re-bond the plain leather layer 100 and the shell body 200 until the plain leather layer 100 and the shell body 200 are aligned. In this case, the accuracy of the alignment of the plain leather layer 100 and the shell body 200 can be ensured, and the pre-activation of the first hot melt adhesive layer 410 can avoid the problem of excessive pulling force causing damage to the plain leather layer 100 or the shell body 200 when separating the plain leather layer 100 and the shell body 200 if the plain leather layer 100 and the shell body 200 are not aligned and need to be separated.

[0101] The pre-lamination temperature may be 160±10° C., the pre-lamination time may be 5±3 s, and the pre-lamination pressure may be 0.4±0.2 MPa.

[0102] S303 , heat press the element skin layer 100 and the shell body 200 .

[0103] A hot press can be used to fully activate the first hot melt adhesive layer 410 on the surface of the plain leather layer 100, so that the plain leather layer 100 and the shell body 200 are more firmly attached and the bonding strength between the plain leather layer 100 and the shell body 200 is ensured. The hot press temperature can be 165±10°C, the time can be 30±5s, and the pressure can be 1.1±0.5kg.

[0104] S304 , cold pressing element skin layer 100 and shell body 200 .

[0105] A cold press can be used to cool and shape the first hot melt adhesive layer 410 activated on the surface of the plain leather layer 100 to ensure the flatness of the product surface. The cold press pressure can be 0.8±0.3 Torr and the time can be 20±5 seconds.

[0106] In this case, the accuracy of the alignment between the plain leather layer 100 and the shell body 200 can be ensured, the firmness of the adhesion between the plain leather layer 100 and the shell body 200 can be ensured, and the flatness of the shell surface can also be ensured.

[0107] In the above solution, whether the organic silicone layer 110 is superimposed and fixed on the base fabric layer 120 and then the superimposed and fixed organic silicone layer 110 and base fabric layer 120 are cut according to a preset size to obtain the plain leather layer 100, or the organic silicone layer 110 and base fabric layer 120 are cut according to a preset size to obtain multiple prefabricated plain leather layers 130, and then the multiple prefabricated plain leather layers 130 are spliced ​​to form the plain leather layer 100, the first hot melt adhesive layer 410 can be applied to the surface of the base fabric layer 120 facing away from the organic silicone layer 110 before cutting the superimposed and fixed organic silicone layer 110 and base fabric layer 120. This method is more convenient for mass production of shells and can improve production efficiency.

[0108] When it is necessary to prepare a shell having a plain leather layer 100 formed by splicing multiple prefabricated plain leather layers 130, a first hot melt adhesive layer 410 can be first coated on the surface of the base fabric layer 120 facing away from the organic silicone layer 110, and then the stacked and fixed organic silicone layer 110 and the base fabric layer 120 are cut according to a preset size to obtain multiple prefabricated plain leather layers 130, and then multiple prefabricated plain leather layers 130 are spliced ​​to form a plain leather layer 100, and finally the plain leather layer 100 and the shell body 200 are pre-laminated, the plain leather layer 100 and the shell body 200 are hot-pressed, and the plain leather layer 100 and the shell body 200 are cold-pressed.

[0109] When it is necessary to prepare a shell having a plain leather layer 100 formed by splicing multiple prefabricated plain leather layers 130, before stacking and fixing the plain leather layer 100 on the shell body 200, a second hot melt adhesive layer 420 can be coated on the surface of the shell body 200 facing the plain leather layer 100 or on the surface of the plain leather layer 100 formed by splicing multiple prefabricated plain leather layers 130, and then the plain leather layer 100 and the shell body 200 are pre-laminated, hot-pressed and cold-pressed. When the plain leather layer 100 and the shell body 200 are pre-laminated and hot-pressed, the first hot melt adhesive layer 410 and the second hot melt adhesive layer 420 can be heated and melted into an integrated structure, which can eliminate the gaps between the first hot melt adhesive layers 410 on the multiple prefabricated plain leather layers 130.

[0110] In order to improve the aesthetics of the housing, in an optional embodiment, the preparation method may further include:

[0111] S401, prepare the logo inlay 330.

[0112] The logo insert 330 is processed into a preset size by CNC. The tool used in the processing can be a single-edged left-handed PCD tool, and the tool rotation speed can be 30000±5000rpm. The logo insert 330 can also be rough milled and fine milled. The tool rotation speed used in the rough milling process can be 1500±600mm / min, and the tool rotation speed used in the fine milling process can be 400±200mm / min.

[0113] S402 , opening an avoidance hole on the plain leather layer 100 , wherein the shape of the avoidance hole is the same as that of the logo inlay 330 .

[0114] The avoidance holes may be opened on the plain leather layer 100 by laser cutting. Of course, the avoidance holes may also be opened on the plain leather layer 100 by other methods, which is not limited in this application.

[0115] S403 , connecting the logo inlay 330 to the surface of the shell body 200 facing the plain leather layer 100 , and the logo inlay 330 is located in the avoidance hole.

[0116] Double-sided tape can be applied to one side of the logo inlay 330 to bond it to the case body 200. The double-sided tape is solid, making it easier to bond the logo inlay 330. Alternatively, other liquid adhesives can be used to bond the logo inlay 330 to the case body 200. When bonding the logo inlay 330 to the case body 200, a pressure of 0.4±0.2 kN can be applied for 7±3 seconds to ensure the connection strength between the logo inlay 330 and the case body 200.

[0117] In an optional embodiment, the plain leather layer 100 may be first laminated and fixed on the shell body 200, and then the logo inlay 330 may be bonded to the shell body 200. In another optional embodiment, the logo inlay 330 may be first bonded to the shell body 200, and then the plain leather layer 100 may be laminated and fixed on the shell body 200 to form the shell.

[0118] In this case, the aesthetics of the housing can be enhanced by the logo insert 330 .

[0119] In order to improve the aesthetics of the housing, in an optional embodiment, the preparation method may further include:

[0120] The second mark 320 is provided on the plain leather layer 100 by laser engraving. The second mark 320 can be located on the surface of the plain leather layer 100 facing away from the shell body 200 .

[0121] The second mark 320 can be a second text or a second pattern. A UV laser marking machine can be used to form a tiny, deep second mark 320 on the surface of the silicone layer 110 by controlling the laser power and frequency. This method can achieve a visual difference between the surface texture of the silicone layer 110 and the laser-engraved second mark 320, thereby improving the appearance of the housing without affecting the surface performance of the silicone layer 110. During the laser engraving process of the second mark 320, the UV laser marking machine can have a speed of 1000±50mm / s, a power of 60±5W, a frequency of 10±2%, a light-on delay of 300±30μs, and a light-off delay of 150±30μs.

[0122] The depth of the second mark 320 can be less than or equal to the thickness of the anti-fouling layer 111, that is, the second mark 320 can be formed on the anti-fouling layer 111, and the depth of the second mark 320 can also be greater than the thickness of the anti-fouling layer 111. The depth direction of the second mark 320 is consistent with the thickness direction of the anti-fouling layer 111. This application does not limit the depth of the second mark 320.

[0123] It should be noted that the second logo 320 can be set on the plain leather layer 100 by laser engraving after the plain leather layer 100 is stacked and fixed on the shell body 200, or the second logo 320 can be set on the plain leather layer 100 by laser engraving after the organic silicone layer 110 is fixed on the base fabric layer 120 in a stacked manner to form the plain leather layer 100, and before the plain leather layer 100 is fixed on the shell body 200 in a stacked manner.

[0124] This application also discloses a housing, which is prepared using the above-described preparation method. The housing can be applied to an electronic device, such as a battery cover for the electronic device. The disclosed housing includes a plain leather layer 100 and a housing body 200. The plain leather layer 100 includes an organic silicone layer 110 and a base fabric layer 120 that are stacked and connected. The plain leather layer 100 and the housing body 200 are stacked and connected, and the organic silicone layer 110 is located on the side of the base fabric layer 120 that faces away from the housing body 200.

[0125] In the embodiment of the present application, the organic silicone layer 110 is made of an organic silicone material, which has excellent hydrophobic and oleophobic properties, giving the organic silicone layer 110 good anti-fouling performance. The organic silicone layer 110 is located on the side of the base fabric layer 120 facing away from the shell body 200, so that the organic silicone layer 110 forms part of the outer surface of the shell. The good anti-fouling performance of the organic silicone layer 110 can improve the anti-fouling performance of the plain leather layer 100 and alleviate the problem that the plain leather layer 100 is easily contaminated. As can be seen, the present application can solve the problem of the plain leather layer of the plain leather shell being easily contaminated in the related art.

[0126] In a further technical solution, the organic silicone layer 110 may include an anti-fouling layer 111, a wear-resistant layer 112, and a main layer 113, which are stacked and connected in sequence. The main layer 113 is stacked and connected to the base fabric layer 120. The anti-fouling layer 111 has good anti-fouling effect, yellowing resistance, and chemical solvent resistance. The wear-resistant layer 112 has good wear resistance. The main layer 113 can ensure the mechanical properties of the organic silicone layer 110, such as tear strength, flexibility, and bonding strength. In this case, the anti-fouling layer 111, wear-resistant layer 112, and main layer 113 are different functional layers, giving the organic silicone layer 110 multiple properties.

[0127] The components of the anti-fouling layer 111, the wear-resistant layer 112 and the main body layer 113 may include a silica gel matrix, a catalyst, a cross-linking agent, and a reinforcing agent, wherein:

[0128] The anti-fouling layer 111 forms part of the outer surface of the shell. The anti-fouling layer 111 has good anti-fouling effect, yellowing resistance and chemical solvent resistance. The degree of intermolecular cross-linking is relatively high. At the same time, in order to ensure a good hand feel experience, the reinforcing agent can be appropriately reduced. In an optional embodiment, the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent in the anti-fouling layer 111 can be 200:1:80:40.

[0129] The wear-resistant layer 112 serves as an intermediate transition layer and has good wear resistance. At the same time, in order to improve the adhesion and bonding performance between the anti-fouling layer 111 and the main layer 113, its reinforcing agent can be relatively increased. Therefore, in an optional embodiment, the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent in the wear-resistant layer 112 can be 250:1:75:60.

[0130] The main layer 113 is used to ensure the mechanical properties of the organic silicone layer 110, such as tear strength, flexibility, bonding strength, etc., and the main layer 113 needs to have good wettability to the base fabric layer 120, and can infiltrate the base fabric layer 120 to enhance the interfacial intermolecular bonding performance between the organic silicone layer 110 and the base fabric layer 120. Therefore, the content of the silicone matrix can be increased to ensure the degree of intermolecular cross-linking. In an optional embodiment, the ratio of the silicone matrix, catalyst, cross-linking agent and reinforcing agent in the main layer 113 can be 300:1:75:40.

[0131] In this case, different organic silicone functional layers are obtained by changing the ratio of the silicone matrix, the catalyst, the cross-linking agent and the reinforcing agent.

[0132] In a further technical solution, one or more of the components of the anti-fouling layer 111, the wear-resistant layer 112, and the main layer 113 may further include a colorant. The colorant may be a coloring paste, and the coloring paste in the anti-fouling layer 111, the wear-resistant layer 112, and the main layer 113 may be added according to specific needs. This application does not limit the content of the coloring paste. In this case, by adding a colorant, the color of the plain leather layer 100 or the color of a portion of the plain leather layer 100 can be adjusted to enhance the aesthetics of the plain leather layer 100, thereby enhancing the aesthetics of the shell.

[0133] In order to improve the aesthetics of the shell, the surface of the anti-fouling layer 111 facing the wear-resistant layer 112 can be provided with a first logo 310, and the area of ​​the anti-fouling layer 111 opposite to the first logo 310 can be a transparent area, the surface of the plain leather layer 100 facing away from the shell body 200 can be provided with a second logo 320, and the surface of the shell body 200 facing the plain leather layer 100 can be provided with a logo inlay 330, the plain leather layer 100 can be provided with an avoidance hole, and the logo inlay 330 can be located within the avoidance hole.

[0134] To enhance the aesthetics of the housing, in an optional embodiment, the plain leather layer 100 may include multiple prefabricated plain leather layers 130. These multiple prefabricated plain leather layers 130 may be spliced ​​together to form the plain leather layer 100. At least two of the prefabricated plain leather layers 130 may have different colors, and at least two of the prefabricated plain leather layers 130 may have different textures, such as lines or roughness. In this case, the housing may have a richer appearance with richer colors or textures, thereby enhancing the housing's aesthetics.

[0135] In the above scheme, the organic silicone layer 110 and the base fabric layer 120 are stacked and connected. In an optional embodiment, the organic silicone layer 110 and the base fabric layer 120 can be stacked and connected by silicone glue or silane coupling agent to enhance the connection strength between the organic silicone layer 110 and the base fabric layer 120, thereby improving the structural strength of the shell.

[0136] Based on the housing of the above embodiment of the present application, the present application also discloses an electronic device including the above housing. The derivation process of the beneficial effects produced by the electronic device is generally similar to the derivation process of the beneficial effects brought by the above housing, so it will not be repeated here.

[0137] The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-reader, or a wearable device. Of course, the electronic device may also be other devices, and the embodiments of the present application do not limit this.

[0138] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A method for preparing a shell, characterized in that: include: An organic silicone layer is prepared; wherein a first organic silicone material is coated on the surface of a coating base layer to form an anti-fouling layer; a second organic silicone material is coated on the surface of the anti-fouling layer to form a wear-resistant layer; a first mark is made on the anti-fouling layer using a silicone-based silk screen ink, wherein the first mark is located on the surface of the anti-fouling layer facing the wear-resistant layer, and the area of ​​the anti-fouling layer opposite the first mark is a transparent area; a third organic silicone material is coated on the surface of the wear-resistant layer to form a main layer; and the coating base layer is removed to obtain the organic silicone layer; The organic silicone layer is stacked and fixed on the base fabric layer to form a plain leather layer; wherein, after silicone glue or silane coupling agent is coated on the base fabric layer, and after the third organic silicone material is coated on the surface of the wear-resistant layer, and before the third organic silicone material is cured, the surface of the base fabric layer coated with the silicone glue or the silane coupling agent is stacked on the uncured third organic silicone material to form the plain leather layer; The plain leather layer is stacked and fixed on the shell body to form the shell, wherein the organic silicone layer is located on the side of the base fabric layer facing away from the shell body; a first hot melt adhesive layer is coated on the surface of the base fabric layer facing away from the organic silicone layer, the first hot melt adhesive layer is pre-activated, the plain leather layer and the shell body are pre-laminated, the plain leather layer and the shell body are hot pressed, and the plain leather layer and the shell body are cold pressed.

2. The preparation method according to claim 1, characterized in that The organic silicone layer is stacked and fixed on the base fabric layer to form a plain leather layer. Specifically, the main body layer is stacked and connected with the base fabric layer, the wear-resistant layer is located on the side of the main body layer away from the base fabric layer, and the anti-fouling layer is located on the side of the wear-resistant layer away from the main body layer.

3. The preparation method according to claim 2, characterized in that The components of the anti-fouling layer, the wear-resistant layer and the main layer all include a silica gel matrix, a catalyst, a cross-linking agent and a reinforcing agent, wherein: The ratio of the silica gel matrix, the catalyst, the cross-linking agent and the reinforcing agent in the anti-fouling layer is 200:1:80:40; The ratio of the silica gel matrix, the catalyst, the cross-linking agent and the reinforcing agent in the wear-resistant layer is 250:1:75:60; The ratio of the silica gel matrix, the catalyst, the cross-linking agent and the reinforcing agent in the main layer is 300:1:75:

40.

4. The preparation method according to claim 3, characterized in that One or more of the components of the anti-fouling layer, the wear-resistant layer, and the body layer further include a toner.

5. The preparation method according to claim 1, characterized in that After the organic silica gel layer is stacked and fixed on the base fabric layer, and before the plain leather layer is stacked and fixed on the shell body, the preparation method further includes: Cutting the stacked and fixed organic silica gel layer and the base fabric layer according to a preset size to obtain a plurality of prefabricated plain skin layers; The plurality of prefabricated plain skin layers are spliced ​​together to form the plain skin layer.

6. The preparation method according to claim 1, characterized in that The preparation method further comprises: A second mark is provided on the plain leather layer by laser engraving, and the second mark is located on a surface of the plain leather layer facing away from the shell body.

7. A housing, characterized in that: The shell is prepared by the preparation method described in any one of claims 1 to 6, and the shell includes a plain leather layer and a shell body, wherein: the plain leather layer includes an organic silicone layer and a base fabric layer that are stacked and connected, the plain leather layer is stacked and connected to the shell body, and the organic silicone layer is located on the side of the base fabric layer away from the shell body.

8. An electronic device, characterized in that: Comprising the housing according to claim 7.

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