CN111361228A - Electronic equipment glass shell, preparation method thereof and electronic equipment - Google Patents
Electronic equipment glass shell, preparation method thereof and electronic equipment Download PDFInfo
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- CN111361228A CN111361228A CN201811605108.8A CN201811605108A CN111361228A CN 111361228 A CN111361228 A CN 111361228A CN 201811605108 A CN201811605108 A CN 201811605108A CN 111361228 A CN111361228 A CN 111361228A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
The shell comprises an ultrathin glass layer and a reinforced fiber layer, wherein the ultrathin glass layer and the reinforced fiber layer are bonded by a resin layer, and the thickness of the ultrathin glass layer is 0.2-0.5 mm. According to the method, the ultrathin glass and the reinforced fiber board are subjected to interlayer compounding, the mechanical performance of the product is greatly improved, the prepared glass shell has a good explosion-proof effect, and the safety performance of electronic equipment is improved.
Description
Technical Field
The disclosure relates to an electronic device glass shell, a preparation method thereof and an electronic device.
Background
The laminated glass is a composite glass product which is formed by two or more pieces of glass, wherein one or more layers of organic polymer intermediate films are sandwiched between the two or more pieces of glass, and the glass and the intermediate films are permanently bonded into a whole after special high-temperature prepressing (or vacuumizing) and high-temperature high-pressure processing. After the laminated glass is used as safety glass and is crushed by impact, the interlayer film sandwiched between two pieces of common glass can not generate sharp fragments to hurt people like the common glass after being crushed due to the bonding effect of the interlayer film. Meanwhile, the middle film has the performance of sound insulation and sunlight control, and becomes a novel building material with energy-saving and environment-friendly functions.
At present, laminated glass is widely applied to the fields of buildings and automobiles, but the mechanical property of ultrathin glass on electronic equipment is still poor after the ultrathin glass is subjected to laminated compounding.
Disclosure of Invention
The invention aims to provide an electronic equipment glass shell, a preparation method thereof and electronic equipment, and aims to solve the problem that the mechanical property of the electronic equipment glass shell in the prior art is poor.
To achieve the above object, a first aspect of the present disclosure: the glass shell of the electronic equipment comprises an ultrathin glass layer and a reinforced fiber layer, wherein the ultrathin glass layer and the reinforced fiber layer are bonded through a resin layer, and the thickness of the ultrathin glass layer is 0.2-0.5 mm.
Optionally, the number of the ultrathin glass layers is one or more, and the number of the reinforcing fiber layers is one or more;
when the number of the ultrathin glass layers is multiple and/or the number of the reinforcing fiber layers is multiple, the adjacent ultrathin glass layers and the reinforcing fiber layers, and/or the adjacent ultrathin glass layers, and/or the adjacent reinforcing fiber layers are bonded by the resin layers.
Optionally, the thickness of the reinforced fiber layer is 0.2-0.5 mm.
Optionally, the ultra-thin glass forming the ultra-thin glass layer is one of 2D glass, 2.5D glass, and 3D glass.
Optionally, the thickness of the resin layer is 0.025-0.1 mm, and the resin forming the resin layer is at least one of PVB, EVA and SGP.
Optionally, the elastic modulus of the resin is 2000-2500 MPa.
Optionally, the reinforcing fiber sheet forming the reinforcing fiber layer is a carbon fiber sheet.
Optionally, the bending strength of the shell is 1000-1300 MPa.
In a second aspect of the present disclosure: there is provided a method of making a glass housing for an electronic device according to the first aspect of the present disclosure, the method comprising: a resin sheet is placed between the ultra-thin glass and the reinforced fiber sheet, and then heat-pressure welding is performed.
Optionally, the method comprises: placing a resin sheet between the adjacent ultrathin glass and the reinforced fiber board of the multilayer ultrathin glass and/or multilayer reinforced fiber board, and then carrying out hot-press welding; and/or placing the resin sheet between the adjacent two layers of ultrathin glass of the multilayer ultrathin glass and/or the multilayer reinforced fiber board, and then carrying out hot-press welding; and/or placing the resin sheet between the adjacent two reinforced fiber plates of the multilayer ultrathin glass and/or multilayer reinforced fiber plates, and then carrying out hot-press welding.
Optionally, the heat and pressure welding comprises: vacuumizing for 30-60 min at 15-25 ℃, heating to 90-150 ℃, baking for 30-60 min, boosting to 0.5-0.7 MPa, continuously heating to 130-160 ℃, boosting to 1.2-1.5 MPa, and preserving heat and pressure for 30-60 min.
Optionally, the method further comprises: firstly, carrying out first pretreatment on the ultrathin glass, and then carrying out hot-press fusion;
the first pre-treatment includes at least one of a CNC machining process, a polishing process, a hot bending process, and a chemical strengthening process.
Optionally, the method further comprises the step of optically coating and/or etching the ultra-thin glass after the first pretreatment.
Optionally, the method further comprises: firstly, carrying out second pretreatment on the reinforced fiber board, and then carrying out hot-press fusion;
the second pre-treatment includes at least one of a CNC machining process, a polishing process, and a forming process.
A third aspect of the disclosure: there is provided a method of making a glass housing for an electronic device according to the first aspect of the present disclosure, the method comprising: and adhering liquid resin between the ultrathin glass and the reinforced fiber board by a rolling mode, and then carrying out UV light curing.
Optionally, the method comprises: attaching liquid resin between adjacent ultrathin glass and reinforced fiber plates of the multilayer ultrathin glass and/or multilayer reinforced fiber plates in a rolling manner, and then carrying out UV (ultraviolet) light curing; and/or attaching liquid resin between two adjacent layers of ultrathin glass of the multilayer ultrathin glass and/or the multilayer reinforced fiber board in a rolling way, and then carrying out UV light curing; and/or attaching liquid resin between two adjacent reinforced fiber plates of the multilayer ultrathin glass and/or the multilayer reinforced fiber plates by rolling, and then carrying out UV light curing.
Optionally, the rolling conditions include: the hardness of the rubber roller is 40-70 HS, and the rolling speed is 60-90 mm/s;
the conditions for the UV light curing include: the curing energy is 600-1000 MJ/m2。
Optionally, the method further comprises: firstly, carrying out first pretreatment on the ultrathin glass, and then carrying out UV light curing;
the first pre-treatment includes at least one of a CNC machining process, a polishing process, a hot bending process, and a chemical strengthening process.
Optionally, the method further comprises the step of optically coating and/or etching the pretreated ultrathin glass.
Optionally, the method further comprises: firstly, carrying out second pretreatment on the reinforced fiber board, and then carrying out UV light curing;
the second pre-treatment includes at least one of a CNC machining process, a polishing process, and a forming process.
A fourth aspect of the present disclosure: there is provided an electronic device comprising an electronic device glass housing according to the first aspect of the present disclosure.
Compared with the existing laminated glass used in the fields of buildings and automobiles, the ultrathin glass and the reinforced fiber board are subjected to interlayer compounding to prepare the ultrathin glass shell suitable for electronic equipment, and a 2D, 2.5D and especially 3D multilayer laminated glass structure can be realized. In addition, the alignment precision when traditional car and building field preparation laminated glass is 2mm, need carry out the edge and bordure in order to cover flaw such as excessive glue, and the preparation technology of this disclosure is particularly useful for preparing the glass casing that is used for electronic equipment, compares traditional laminated glass's production technology can avoid producing defects such as bubble, water ripple, and the product composite precision can reach 0.05 mm. Compared with the existing glass shell of the electronic equipment, the glass shell has the advantages that the mechanical performance of the glass shell is greatly improved, the glass shell has a good explosion-proof effect, and the safety performance of the electronic equipment can be improved; in addition, the texture structure of the reinforced fiber adds a good surface decoration effect to the glass shell.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present disclosure. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
The first aspect of the disclosure: the glass shell of the electronic equipment comprises an ultrathin glass layer and a reinforced fiber layer, wherein the ultrathin glass layer and the reinforced fiber layer are bonded through a resin layer.
According to the present disclosure, the object of the present disclosure can be achieved by only sandwich-compounding the reinforcing fiber layer and the ultra-thin glass layer, wherein the sandwich-compounding means bonding the reinforcing fiber layer and the ultra-thin glass layer with a resin layer as an intermediate interlayer. The number of the ultrathin glass layers and the number of the reinforcing fiber layers are not limited in the present disclosure, that is, the number of the ultrathin glass layers may be one or more, the number of the reinforcing fiber layers may also be one or more, and the specific number of the ultrathin glass layers and the reinforcing fiber layers may be adjusted according to actual needs, for example, the number of the ultrathin glass layers may be 1 to 3, and the number of the reinforcing fiber layers may be 1 to 3.
In the embodiment where the number of ultrathin glass layers is multiple and/or the number of reinforcing fiber layers is multiple, the stacking order of the ultrathin glass layers and the reinforcing fiber layers is not limited, and multiple ultrathin glass layers may be stacked and then combined with one or more reinforcing fiber layers, or the ultrathin glass layers and the reinforcing fiber layers may be interpenetrated and combined. When the number of the ultrathin glass layers is multiple and/or the number of the reinforcing fiber layers is multiple, in different lamination modes, every two adjacent layers are bonded by a resin layer, namely, the adjacent ultrathin glass layers and the reinforcing fiber layers, and/or the adjacent ultrathin glass layers, and/or the adjacent reinforcing fiber layers are bonded by the resin layers.
According to the present disclosure, the ultra-thin glass layer and the reinforcing fiber layer are both thin, so that the glass housing of the present disclosure has a thin overall size, and is suitable for electronic devices. Specifically, the thickness of the ultrathin glass layer can be 0.2-0.5 mm, and the thickness of the reinforced fiber layer can be 0.2-0.5 mm.
According to the present disclosure, the ultra-thin glass forming the ultra-thin glass layer may be one of 2D glass, 2.5D glass, and 3D glass.
According to the present disclosure, the thickness of the resin layer is also thin, and may be, for example, 0.025 to 0.1 mm. The resin forming the resin layer may be at least one of PVB (polyvinyl butyral), EVA (ethylene vinyl acetate copolymer), and SGP (ionic film ethylene methacrylate copolymer containing about 1 wt% of sodium ions). Further, the elastic modulus of the resin may be 2000 to 2500 MPa. The resin has good adhesive force and transmittance, can enable the prepared laminated glass to have good strength and drop resistance, is thin in thickness, and can meet the use requirements of electronic equipment shells.
According to the present disclosure, the reinforced fiber sheet forming the reinforced fiber layer may be a carbon fiber sheet, which has high strength and good flexibility, and is advantageous to improve mechanical properties of a product.
According to the glass shell, the ultrathin glass and the reinforced fibers are adopted for interlayer compounding, so that the mechanical performance of the product is greatly improved, and the glass shell is more excellent in falling ball test, bending resistance test and drop test compared with the glass shell in the prior art. Specifically, the bending strength of the shell can be 1000-1300 MPa. The glass shell has a good explosion-proof effect, and the safety performance of electronic equipment can be improved. In addition, the texture structure of the reinforced fiber adds a good surface decoration effect to the glass shell.
In a second aspect of the present disclosure, there is provided a method for manufacturing a glass housing of an electronic device according to the first aspect of the present disclosure, the method comprising: a resin sheet is placed between the ultra-thin glass and the reinforced fiber sheet, and then heat-pressure welding is performed.
When the number of the ultra-thin glass layers and/or the number of the reinforcing fiber layers of the prepared glass shell are multiple, in different lamination modes, a resin sheet can be placed between every two adjacent layers, and then hot-press welding is carried out, so that multiple layers of ultra-thin glass and/or multiple layers of reinforcing fiber plates can be bonded with each other, that is, the method can comprise the following steps: placing a resin sheet between the adjacent ultrathin glass and the reinforced fiber board of the multilayer ultrathin glass and/or multilayer reinforced fiber board, and then carrying out hot-press welding; and/or placing the resin sheet between the adjacent two layers of ultrathin glass of the multilayer ultrathin glass and/or the multilayer reinforced fiber board, and then carrying out hot-press welding; and/or placing the resin sheet between the adjacent two reinforced fiber plates of the multilayer ultrathin glass and/or multilayer reinforced fiber plates, and then carrying out hot-press welding.
According to the present disclosure, the ultra-thin glass may be pre-treated to meet the specifications and properties required by the product (e.g., 3D glass is subjected to a hot bending process) before being subjected to the thermocompression bonding. Accordingly, the method may further comprise: the ultra-thin glass is subjected to first pretreatment, and then is superposed with a resin sheet and a reinforced fiber board to be subjected to hot-press welding. The first pre-treatment may include at least one of a CNC machining process, a polishing process, a hot bending process and a chemical strengthening process, which are well known to those skilled in the art and will not be described in detail in this disclosure.
According to the present disclosure, in order to further improve the color and brightness of the product, the method may further include a step of optically coating and/or etching the ultra-thin glass after the first pretreatment, and then performing the thermocompression bonding. The optical coating and/or etching may be performed on the contact surface of the pretreated ultra-thin glass and the resin sheet, and the specific steps may be conventional in the art.
According to the present disclosure, before the hot-press fusion, the reinforced fiber board may be subjected to a certain pretreatment to achieve the required specification of the product (e.g., 3D shape by molding or vacuum hot-press method). Accordingly, the method may further comprise: and firstly, carrying out second pretreatment on the reinforced fiber board, then overlapping the reinforced fiber board with a resin sheet and ultrathin glass, and carrying out hot-press welding. The second pre-treatment may include at least one of a CNC machining process, a polishing process, and a molding process (e.g., a compression molding process or a vacuum hot press molding process).
According to the present disclosure, the resin sheet of the present disclosure has a higher elastic modulus than a resin sheet used in a conventional laminated glass, so that the prepared glass housing has better elastic deformation resistance and higher falling ball impact resistance. For example, the elastic modulus of the resin sheet selected by the present disclosure may be 2000 to 2500 MPa. The resin sheet with the elastic modulus contains a high-viscosity plasticizer, so that the resin flowability can be improved, the elastic modulus of the resin sheet is higher than that of a traditional resin sheet, and the thickness of the resin sheet can be formed to be thinner (for example, the thickness can be 0.025-0.1 mm); the conventional resin sheet has an elastic modulus of not higher than 200MPa and a thickness of at least 0.38 mm. The resin sheet may be cut to a desired thickness and size by laser or die cutting.
According to the disclosure, before the hot-press welding, the reinforced fiber board, the resin sheet and the ultra-thin glass can be placed into a positioning jig for positioning according to the order of alternately stacking a layer of reinforced fiber board or ultra-thin glass and a layer of resin sheet, and then transferred to a hot-press welding device to start the hot-press welding. The process of thermocompression bonding may include: vacuumizing for 30-60 min at 15-25 ℃, heating to 90-150 ℃, baking for 30-60 min, boosting to 0.5-0.7 MPa, continuously heating to 130-160 ℃, boosting to 1.2-1.5 MPa, and preserving heat and pressure for 30-60 min. And finally, cooling to room temperature and then reducing the pressure to complete the welding of the resin sheet and the compounding of the product. Compared with the traditional forming process of the laminated glass, the hot-press welding of the present disclosure is carried out at higher temperature and pressure. The high temperature effect is beneficial to bonding the hydroxyl in the resin sheet and the hydrogen bond in the glass, thereby facilitating the resin sheet to enter the micropores on the surface of the reinforcing fiber; meanwhile, the two can be firmly bonded together under the action of high pressure, so that the overall bending resistance, external impact resistance and falling resistance of the product are improved; the high-elasticity modulus resin sheet disclosed by the invention cannot flow at high temperature and high pressure, the compression amount is less than 5 mu m, the defects of bubbles, water waves and the like can be avoided, and the compounding precision of the product can reach +/-0.05 mm.
In a third aspect of the present disclosure, there is provided another method for manufacturing a glass housing for an electronic device according to the first aspect of the present disclosure, the method comprising: and adhering liquid resin between the ultrathin glass and the reinforced fiber board by a rolling mode, and then carrying out UV light curing. That is, a liquid resin may be rolled on the ultra-thin glass, and then a reinforcing fiber sheet may be stacked; or rolling liquid resin on the reinforced fiber board, and then overlapping the ultrathin glass; the UV light curing is then performed. The meaning of rolling is well known to those skilled in the art, and the rolling conditions may include: the hardness of the rubber roller is 40-70 HS, and the rolling speed is 60-90 mm/s.
When the number of the ultrathin glass layers and/or the number of the reinforcing fiber layers of the prepared glass shell are multiple, in different lamination modes, liquid resin can be attached between every two adjacent layers in a rolling mode, and then UV light curing is carried out, so that multiple layers of ultrathin glass and/or multiple layers of reinforcing fiber plates can be bonded with each other, namely, the method can comprise the following steps: attaching liquid resin between adjacent ultrathin glass and reinforced fiber plates of the multilayer ultrathin glass and/or multilayer reinforced fiber plates in a rolling manner, and then carrying out UV (ultraviolet) light curing; and/or attaching liquid resin between two adjacent layers of ultrathin glass of the multilayer ultrathin glass and/or the multilayer reinforced fiber board in a rolling way, and then carrying out UV light curing; and/or attaching liquid resin between two adjacent reinforced fiber plates of the multilayer ultrathin glass and/or the multilayer reinforced fiber plates by rolling, and then carrying out UV light curing.
According to the present disclosure, the ultra-thin glass may be pre-treated to achieve the desired specifications and properties of the product (e.g., 3D glass may be subjected to a hot bending process) before being UV light cured. Accordingly, the method may further comprise: firstly, carrying out first pretreatment on the ultrathin glass, then rolling liquid resin and superposing a reinforced fiber board, and carrying out UV light curing. The first pre-treatment may include at least one of a CNC machining process, a polishing process, a hot bending process and a chemical strengthening process, which are well known to those skilled in the art and will not be described in detail in this disclosure.
According to the present disclosure, in order to further improve the color and brightness of the product, the method may further include a step of optically coating and/or etching the ultra-thin glass after the first pretreatment, and then performing the UV light curing. The optical coating and/or etching may be performed on the contact surface of the pretreated ultra-thin glass and the resin sheet, and the specific steps may be conventional in the art.
According to the present disclosure, before the UV light curing, the reinforced fiber board may be subjected to a certain pretreatment to achieve the required specification of the product (e.g., forming a 3D shape by a mold pressing or vacuum hot pressing method). Accordingly, the method may further comprise: and carrying out second pretreatment on the reinforced fiber board, then rolling liquid resin and superposing ultrathin glass, and carrying out UV light curing. The second pre-treatment may include at least one of a CNC machining process, a polishing process, and a molding process (e.g., a compression molding process or a vacuum hot press molding process).
According to the disclosure, theUV light curing can be carried out in equipment conventional in the art. The conditions for the UV light curing may include: the curing energy is 600-1000 MJ/m2。
Compared with the existing single-layer glass shell and double-layer glass composite shell with the same thickness, the ultrathin glass and the reinforced fiber interlayer composite shell prepared by the method are greatly improved in performance, glass fragments are firmly bonded together through a resin film during crushing, a good explosion-proof effect is achieved, the safety performance of a product is greatly improved, and meanwhile, the ultrathin glass and reinforced fiber interlayer composite shell has good decoration performance.
A fourth aspect of the present disclosure: there is provided an electronic device comprising an electronic device glass housing according to the first aspect of the present disclosure.
The present disclosure is further illustrated by the following examples, but is not to be construed as being limited thereby.
The ultra-thin glass used in the examples was purchased from corning, schottky, etc. Carbon fiber sheets were purchased from Toray plastic corporation, Japan, under the trade designation A504FG 1. PVB film was purchased from ponding Japan, sold under the trade designation S-LECKS-1, with an elastic modulus of 2200 MPa. EVA films are available from DuPont, USA under the trade designation 200w and have an elastic modulus of 2000 MPa.
Example 1
The glass shell of the embodiment is a double-layer 3D ultrathin glass-carbon fiber sandwich structure glass shell with the thickness of 0.625 mm. The preparation method comprises the following steps:
and (3) slicing the ultrathin glass with the thickness of 0.25mm, carrying out CNC (computer numerical control) processing, hot bending, polishing treatment, edge sweeping, chemical strengthening and optical coating, and processing the ultrathin glass into the four-side bent 3D ultrathin glass with the required structure. And cutting, compression molding, CNC (computer numerical control) processing and polishing the carbon fiber plate with the thickness of 0.3mm to obtain the required 3D structure. Putting the pretreated carbon fiber plate into a jig, putting a PVB (polyvinyl butyral) film with the thickness of 0.075mm, putting the pretreated ultrathin glass, positioning, putting the glass into an autoclave, vacuumizing an equipment cavity, vacuumizing the equipment cavity at room temperature of 20 ℃ for 60min, heating to 100 ℃ for baking for 60min, boosting the pressure to 0.5MPa, continuing to heat to 160 ℃, boosting the pressure to 1.5MPa, keeping the temperature and the pressure for 60min, cooling to room temperature, and then reducing the pressure to prepare the glass shell of the embodiment, wherein the appearance of the shell is free of bubbles, and the carbon fiber plate has a surface decoration effect.
Example 2
The glass shell of the embodiment is a double-layer 2.5D ultrathin glass-carbon fiber sandwich structure glass shell with the thickness of 0.85 mm. The preparation method comprises the following steps:
and (3) slicing the ultrathin glass with the thickness of 0.4mm, carrying out CNC (computerized numerical control) processing, polishing, edge sweeping, chemical strengthening, optical coating and other processes to obtain the 2.5D ultrathin glass with the required structure. And cutting, CNC (computer numerical control) processing and polishing the carbon fiber plate with the thickness of 0.4mm to obtain the required 2.5D structure. Putting the pretreated carbon fiber plate into a jig, putting a PVB (polyvinyl butyral) membrane with the thickness of 0.05mm, putting the pretreated ultrathin glass into a autoclave, positioning, putting the glass into the autoclave, vacuumizing the cavity of the equipment at room temperature of 20 ℃ for 30min, heating to 100 ℃ for baking for 30min, boosting the pressure to 0.5MPa, continuing to heat to 160 ℃, boosting the pressure to 1.5MPa, keeping the temperature and the pressure for 60min, cooling to room temperature, and then reducing the pressure to prepare the glass shell of the embodiment, wherein the appearance of the shell is free of bubbles, and the carbon fiber plate has a surface decoration effect.
Example 3
The glass shell of the embodiment is a double-layer 3D ultrathin glass-carbon fiber sandwich structure glass shell with the thickness of 0.7 mm. The preparation method comprises the following steps:
the method comprises the following steps of slicing the ultrathin glass with the thickness of 0.35mm, carrying out CNC (computer numerical control) processing, hot bending, polishing treatment, edge sweeping, chemical strengthening, optical coating and the like, and processing the four-side bent 3D ultrathin glass with the required structure. And cutting, compression molding, CNC (computer numerical control) processing and polishing the carbon fiber plate with the thickness of 0.3mm to obtain the required 3D structure. Putting the pretreated carbon fiber plate into a jig, putting an EVA (ethylene vinyl acetate) membrane with the thickness of 0.05mm, which is subjected to laser cutting, putting the pretreated ultrathin glass, positioning, putting the glass into an autoclave, vacuumizing the cavity of the equipment at room temperature of 20 ℃ for 60min, heating to 100 ℃ for baking for 60min, boosting the pressure to 0.5MPa, continuing to heat to 160 ℃, boosting the pressure to 1.5MPa, preserving heat and maintaining pressure for 60min, cooling to room temperature and then reducing the pressure to prepare the glass shell of the embodiment, wherein the appearance of the shell is bubble-free, and the carbon fiber plate has a surface decoration effect.
Example 4
The glass shell of the embodiment is a 3-layer 3D ultrathin glass-carbon fiber sandwich structure glass shell with the thickness of 0.95 mm. The preparation method comprises the following steps:
the method comprises the following steps of slicing the ultrathin glass with the thickness of 0.25mm, carrying out CNC (computer numerical control) processing, hot bending, polishing treatment, edge sweeping, chemical strengthening, optical coating and the like, and processing the four-side bent 3D ultrathin glass with the required structure. And cutting, compression molding, CNC (computer numerical control) processing and polishing the carbon fiber plate with the thickness of 0.3mm to obtain the required 3D structure. The pretreated carbon fiber plate, a PVB membrane (the same below) with the thickness of 0.075mm, the pretreated ultrathin glass, the PVB membrane and the pretreated ultrathin glass are sequentially placed into a jig, positioned and placed into an autoclave, a cavity of the equipment is vacuumized, the room temperature is firstly 20 ℃ and then is vacuumized for 60min, the temperature is then increased to 100 ℃ and then is baked for 60min, the pressure is then increased to 0.5MPa, the temperature is continuously increased to 160 ℃, the pressure is increased to 1.5MPa, the temperature and the pressure are kept for 60min, and finally the temperature is reduced to the room temperature and then is reduced, so that the glass shell of the embodiment is prepared, the appearance of the shell is free of bubbles, and the carbon fiber plate has a surface decoration effect.
Example 5
The glass shell of the embodiment is a double-layer 2.5D ultrathin glass-carbon fiber sandwich structure glass shell with the thickness of 0.7 mm. The preparation method comprises the following steps:
the 2.5D ultrathin glass with the required structure is processed by the procedures of slicing, CNC (computerized numerical control) processing, polishing, edge sweeping, chemical strengthening, optical coating and the like on the ultrathin glass with the thickness of 0.4 mm. And cutting, CNC (computer numerical control) processing and polishing the carbon fiber plate with the thickness of 0.25mm to obtain the required 2D structure. Rolling liquid PVB resin on the pretreated ultrathin glass under the conditions that the rubber roller hardness is 50HS and the rolling speed is 65mm/s, then overlapping the pretreated carbon fiber plate, and curing energy is 700MJ/m2And carrying out UV light curing under the condition to prepare the glass shell of the embodiment, wherein the shell has no bubbles, and the carbon fiber plate has a surface decoration effect.
Comparative example 1
The glass housing of this comparative example is a 3D single layer glass housing of the same thickness as the double layer 3D sandwich glass housing of example 1.
Comparative example 2
The glass casing of this comparative example is a double-layer laminated glass casing of the same thickness as the double-layer 2.5D sandwich glass casing of example 2. The preparation method comprises the following steps:
the preparation method comprises the steps of carrying out slicing, CNC machining, polishing, edge sweeping, chemical strengthening and the like on two pieces of 2.5D glass with the thickness of 0.4mm to obtain the 2.5D glass with a required structure, putting one piece of the 2.5D glass into a jig, putting a PVB (polyvinyl butyral) membrane with the thickness of 0.05mm subjected to laser cutting, finally putting the other piece of the glass into another piece of the glass, positioning, putting the glass into a hot pressing tank, vacuumizing an equipment cavity, vacuumizing at the room temperature of 20 ℃ for 30min, heating to 100 ℃, baking for 30min, then boosting to 0.5MPa, continuously heating to 160 ℃, boosting to 1.5MPa, preserving heat and pressure for 60min, finally cooling to the room temperature and then reducing the pressure to obtain the double-layer 2.5D laminated glass shell of the comparative example.
Comparative example 3
The glass casing of this comparative example differs from example 1 in that a PVB film having an elastic modulus of 150MPa (available from Chongqing Huakai plastics Co., Ltd., trade name H-FPVB) was used in place of the PVB film in example 1. The preparation method comprises the following steps:
and (3) slicing the ultrathin glass with the thickness of 0.25mm, carrying out CNC (computer numerical control) processing, hot bending, polishing treatment, edge sweeping, chemical strengthening and optical coating, and processing the ultrathin glass into the four-side bent 3D ultrathin glass with the required structure. And cutting, compression molding, CNC (computer numerical control) processing and polishing the carbon fiber plate with the thickness of 0.3mm to obtain the required 3D structure. Putting the pretreated carbon fiber plate into a jig, putting a PVB (polyvinyl butyral) membrane with the thickness of 0.38mm, putting the pretreated ultrathin glass, positioning, putting the carbon fiber plate into an autoclave, vacuumizing an equipment cavity, vacuumizing for 60min at room temperature of 20 ℃, heating to 100 ℃, baking for 60min, boosting to 0.3MPa, continuing to heat to 130 ℃, boosting to 0.7MPa, preserving heat and pressure for 60min, cooling to room temperature, and then reducing the pressure to prepare the glass shell of the comparative example.
Test examples
The glass cases prepared in examples and comparative examples were tested for their properties and the results are shown in table 1.
Ball drop test: adopting 110g of steel balls to fall onto the central point of the glass shell from different heights, testing from 15cm, smashing 5 times at each height, and then gradually increasing the height by 5cm each time.
And (3) testing the bending resistance: the test was carried out using a 4PB mechanical bending strength tester manufactured by Sitai instruments Co., Ltd, Dongguan. The test method comprises the following steps: and (3) putting the product on an upper span of 20mm and a lower span of 40mm, slowly applying pressure until the glass is broken, wherein the strength measured during breaking is the bending strength.
Testing the composite precision of the product: the glass was cut to make a metallographic phase and measured at 100 times magnification.
TABLE 1
| Examples | Ball drop test results | Bending strength, MPa | Composite precision, mm |
| Example 1 | 150cm uncrushed | 1000 | 0.02 |
| Example 2 | 150cm uncrushed | 1300 | 0.04 |
| Example 3 | 150cm uncrushed | 1200 | 0.04 |
| Example 4 | 150cm uncrushed | 1300 | 0.04 |
| Example 5 | 150cm uncrushed | 1250 | 0.02 |
| Comparative example 1 | 3 rd falling glass breakage at 50cm | 480 | 0.04 |
| Comparative example 2 | Breaking of 3 rd falling glass at 110cm | 780 | 0.02 |
| Comparative example 3 | Breaking of glass in the 1 st drop at 120cm | 850 | 0.15 (severe edge glue overflow) |
As can be seen from table 1, the ultrathin glass-carbon fiber sandwich structured glass housing of the present disclosure has better mechanical properties and composite precision.
The preferred embodiments of the present disclosure have been described in detail above, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (21)
1. The glass shell of the electronic equipment is characterized by comprising an ultrathin glass layer and a reinforced fiber layer, wherein the ultrathin glass layer and the reinforced fiber layer are bonded through a resin layer, and the thickness of the ultrathin glass layer is 0.2-0.5 mm.
2. The housing according to claim 1, wherein the number of layers of ultra-thin glass layers is one or more, and the number of layers of reinforcing fibers is one or more;
when the number of the ultrathin glass layers is multiple and/or the number of the reinforcing fiber layers is multiple, the adjacent ultrathin glass layers and the reinforcing fiber layers, and/or the adjacent ultrathin glass layers, and/or the adjacent reinforcing fiber layers are bonded by the resin layers.
3. The shell according to claim 1 or 2, wherein the thickness of the reinforcing fiber layer is 0.2-0.5 mm.
4. The housing according to claim 1 or 2, wherein the ultra-thin glass forming the ultra-thin glass layer is one of 2D glass, 2.5D glass, and 3D glass.
5. The case according to claim 1 or 2, wherein the resin layer has a thickness of 0.025 to 0.1mm, and the resin forming the resin layer is at least one of PVB, EVA and SGP.
6. The case according to claim 5, wherein the resin has an elastic modulus of 2000 to 2500 MPa.
7. The case according to claim 1 or 2, wherein the reinforced fiber sheet forming the reinforced fiber layer is a carbon fiber sheet.
8. The shell according to claim 1 or 2, wherein the shell has a bending strength of 1000 to 1300 MPa.
9. A method for manufacturing the glass shell of the electronic device as claimed in any one of claims 1 to 8, the method comprising: a resin sheet is placed between the ultra-thin glass and the reinforced fiber sheet, and then heat-pressure welding is performed.
10. The method of claim 9, wherein the method comprises: placing a resin sheet between the adjacent ultrathin glass and the reinforced fiber board of the multilayer ultrathin glass and/or multilayer reinforced fiber board, and then carrying out hot-press welding; and/or placing the resin sheet between the adjacent two layers of ultrathin glass of the multilayer ultrathin glass and/or the multilayer reinforced fiber board, and then carrying out hot-press welding; and/or placing the resin sheet between the adjacent two reinforced fiber plates of the multilayer ultrathin glass and/or multilayer reinforced fiber plates, and then carrying out hot-press welding.
11. The method of claim 9 or 10, wherein the thermocompression bonding comprises: vacuumizing for 30-60 min at 15-25 ℃, heating to 90-150 ℃, baking for 30-60 min, boosting to 0.5-0.7 MPa, continuously heating to 130-160 ℃, boosting to 1.2-1.5 MPa, and preserving heat and pressure for 30-60 min.
12. The method of claim 9 or 10, wherein the method further comprises: firstly, carrying out first pretreatment on the ultrathin glass, and then carrying out hot-press fusion;
the first pre-treatment includes at least one of a CNC machining process, a polishing process, a hot bending process, and a chemical strengthening process.
13. The method of claim 12, further comprising the step of optically coating and/or etching the first pretreated ultra-thin glass.
14. The method of claim 9, 10 or 13, wherein the method further comprises: firstly, carrying out second pretreatment on the reinforced fiber board, and then carrying out hot-press fusion;
the second pre-treatment includes at least one of a CNC machining process, a polishing process, and a forming process.
15. A method for manufacturing the glass shell of the electronic device as claimed in any one of claims 1 to 8, the method comprising: and adhering liquid resin between the ultrathin glass and the reinforced fiber board by a rolling mode, and then carrying out UV light curing.
16. The method of claim 15, wherein the method comprises: attaching liquid resin between adjacent ultrathin glass and reinforced fiber plates of the multilayer ultrathin glass and/or multilayer reinforced fiber plates in a rolling manner, and then carrying out UV (ultraviolet) light curing; and/or attaching liquid resin between two adjacent layers of ultrathin glass of the multilayer ultrathin glass and/or the multilayer reinforced fiber board in a rolling way, and then carrying out UV light curing; and/or attaching liquid resin between two adjacent reinforced fiber plates of the multilayer ultrathin glass and/or the multilayer reinforced fiber plates by rolling, and then carrying out UV light curing.
17. The method of claim 15 or 16, wherein the rolling conditions comprise: the hardness of the rubber roller is 40-70 HS, and the rolling speed is 60-90 mm/s;
the conditions for the UV light curing include: the curing energy is 600-1000 MJ/m2。
18. The method of claim 15 or 16, wherein the method further comprises: firstly, carrying out first pretreatment on the ultrathin glass, and then carrying out UV light curing;
the first pre-treatment includes at least one of a CNC machining process, a polishing process, a hot bending process, and a chemical strengthening process.
19. The method of claim 18, further comprising the step of optically coating and/or etching the first pretreated ultra-thin glass.
20. The method of claim 15 or 16, wherein the method further comprises: firstly, carrying out second pretreatment on the reinforced fiber board, and then carrying out UV light curing;
the second pre-treatment includes at least one of a CNC machining process, a polishing process, and a forming process.
21. An electronic device, characterized in that the electronic device comprises the electronic device glass housing according to any one of claims 1 to 8.
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| CN112165798A (en) * | 2020-09-17 | 2021-01-01 | Oppo（重庆）智能科技有限公司 | Glass shell, preparation method thereof, shell assembly and electronic equipment |
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