WO2024045662A1 - Dispositif électronique, boîtier et procédé de fabrication associé - Google Patents

Dispositif électronique, boîtier et procédé de fabrication associé Download PDF

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Publication number
WO2024045662A1
WO2024045662A1 PCT/CN2023/090904 CN2023090904W WO2024045662A1 WO 2024045662 A1 WO2024045662 A1 WO 2024045662A1 CN 2023090904 W CN2023090904 W CN 2023090904W WO 2024045662 A1 WO2024045662 A1 WO 2024045662A1
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WO
WIPO (PCT)
Prior art keywords
resin
fiberglass
layer
board
prepreg
Prior art date
Application number
PCT/CN2023/090904
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English (en)
Chinese (zh)
Inventor
沈奎
谭东升
Original Assignee
荣耀终端有限公司
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Publication of WO2024045662A1 publication Critical patent/WO2024045662A1/fr

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Classifications

    • 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
    • B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • 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
    • 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
    • B32B17/10—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 synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • 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

Definitions

  • the present application relates to the technical field of electronic equipment, and in particular to an electronic equipment, a housing and a manufacturing method thereof.
  • Fiberglass boards are a common material used to make battery covers. Fiberglass boards are usually made from fiberglass prepreg formed by impregnating fiberglass cloth in epoxy resin. However, the surface of this kind of fiberglass board will have a woven texture of glass fiber, which means that the surface flatness of the battery cover made of the fiberglass board will be poor.
  • a hot melt adhesive film is usually attached to the outside of the fiberglass board, and the base fabric and PU (polyurethane) leather are bonded through hot melt adhesive.
  • the PU leather is located on the outside of the base fabric. That is, the woven texture of the glass fiber is blocked by multi-layer pasting, and the PU leather is used as the outer layer to improve the aesthetics of the battery cover.
  • the thickness of the above-mentioned battery cover is relatively large and cannot produce a high-gloss effect.
  • This application provides an electronic device, a casing and a manufacturing method thereof.
  • the casing can exhibit a high-gloss effect and has a small thickness.
  • the manufacturing method of the casing is used to prepare the above-mentioned casing to produce a casing that can exhibit a high-gloss effect and has a relatively small thickness.
  • the battery cover of this kind of electronic device can use the above-mentioned casing to present a high-gloss effect and have a small thickness.
  • the above-mentioned housing can be used as a battery cover, so that the thickness of the battery cover is reduced and the battery cover presents a high-gloss effect.
  • a first aspect of the application provides a shell, including a fiberglass board and a high-gloss decorative layer.
  • the high-gloss decorative layer is provided on the outer side of the fiberglass board.
  • the fiberglass board includes at least one layer of first fiberglass resin. layer, the first fiberglass resin layer includes a first resin and a first fiberglass fabric, and the curing shrinkage of the first resin is less than one percent.
  • the shrinkage of the first resin is less than one percent, the shrinkage of the first resin is reduced when forming the first fiberglass resin layer, that is, the surface smoothness of the first fiberglass resin layer is improved. It is relatively high, so there is no need to set up other additional shields to block the surface texture.
  • a high-gloss decorative layer can be directly placed on the first fiberglass resin layer to form a shell that can exhibit a high-gloss effect. The thickness of the shell is relatively small.
  • the housing provided by this application has a high-gloss effect while being small in thickness.
  • the curing shrinkage of the first resin is less than five thousandths.
  • the first resin is a mixed resin of benzoxazine resin and bismaleimide resin, a benzoxazine resin or a bismaleimide resin, and the benzoxazine resin In mixed resin with bismaleimide resin
  • the mass ratio of benzoxazine resin to bismaleimide resin is 10%-90%.
  • the curing shrinkage of benzoxazine resin and bismaleimide resin is less than one percent, and the curing shrinkage of the mixed resin of benzoxazine resin and bismaleimide resin is between Between the two, therefore, the curing shrinkage of the mixed resin of benzoxazine resin and bismaleimide resin is also less than one percent, and because the above two resin materials and their mixed resin are used to make glass fiber
  • the preparation process of prepreg is similar to the process of making fiberglass prepreg with epoxy resin. That is to say, the shell provided in this application can be prepared using the equipment that originally uses epoxy resin to make fiberglass prepreg. Replace equipment.
  • the first resin is a mixed resin of benzoxazine resin and epoxy resin.
  • the benzoxazine resin and epoxy resin are mixed.
  • the mass ratio of oxygen resin is 10%-90%; or,
  • the first resin is a mixed resin of bismaleimide resin and epoxy resin.
  • the ratio between bismaleimide resin and epoxy resin is The mass ratio is 10%-90%.
  • the curing shrinkage of the mixed resin of benzoxazine resin and epoxy resin, and the curing shrinkage of the mixed resin of bismaleimide resin and epoxy resin are both less than one percent, and can be used
  • the shell provided in this application can be prepared using equipment originally used to make glass fiber prepreg using epoxy resin, without the need to replace the equipment.
  • the preparation efficiency of glass fiber boards can be improved by using a mixed resin of benzoxazine resin and epoxy resin, or a mixed resin of bismaleimide resin and epoxy resin.
  • the fiberglass board includes multiple layers of first fiberglass resin layers, and multiple layers of the first fiberglass resin layers are stacked to form the fiberglass board.
  • multiple first glass fiber resin layers can improve the structural strength and stiffness of the glass fiber board.
  • the production process of the multiple first glass fiber resin layers is the same, which facilitates production and manufacturing.
  • the number of stacks of the first fiberglass resin layer is 3-5.
  • the rigidity and strength of the fiberglass board formed after stacking 3 to 5 layers of first fiberglass resin layers are relatively strong.
  • the thickness of the first fiberglass resin layer is 0.08mm-0.10mm.
  • the first fiberglass resin layer has a certain structural strength and rigidity at a relatively small thickness.
  • the thickness of the high-gloss decorative layer is 0.05mm-0.08mm.
  • the high-gloss decorative layer can block the outer surface of the first fiberglass resin layer to present a better high-gloss effect.
  • the fiberglass board further includes a second fiberglass resin layer, and the curing shrinkage rate of the second fiberglass resin layer is greater than the curing shrinkage rate of the first fiberglass resin layer; the second fiberglass resin layer
  • the fiberglass resin layer includes a second resin and a second fiberglass fabric, and the first fiberglass resin layer is provided between the second fiberglass resin layer and the high-gloss decorative layer.
  • the outermost layer of the fiberglass board that is, the layer used to set the high-gloss decorative layer
  • the first fiberglass resin layer so that the high-gloss decorative layer can be set on a surface with high surface flatness.
  • the surface of the first fiberglass resin layer thus presents a better high-gloss effect, and in other stacks that are not used to provide high-gloss decorative layers, a second fiberglass resin layer made of other materials can be used.
  • a second aspect of this application provides an electronic device, including the housing provided by the above technical solution.
  • the thickness of the above casing is small and can be It can produce high-gloss effect, thus making electronic devices relatively small in thickness and capable of showing high-gloss effect.
  • the third aspect of this application provides a method for making a shell, including:
  • Preparing a first resin to form a first prepolymer glue solution the curing shrinkage of the first resin is less than one percent
  • Prepreg containing at least the first fiberglass prepreg is made into a fiberglass board, the first fiberglass prepreg in the fiberglass board forms a first fiberglass resin layer, and the fiberglass board including at least one layer of said first fiberglass resin layer;
  • a high-gloss decorative layer is provided on the outside of the fiberglass board.
  • the shrinkage of the first resin is less than one percent, the shrinkage of the first resin is reduced when forming the first fiberglass resin layer, that is, the surface smoothness of the first fiberglass resin layer is improved. It is relatively high, so there is no need to set up other additional shields to block the surface texture.
  • a high-gloss decorative layer can be directly placed on the first fiberglass resin layer to form a shell that can exhibit a high-gloss effect. The thickness of the shell is relatively small.
  • the method for manufacturing a casing provided in this application can produce a casing with a high gloss effect and a small thickness.
  • the high-gloss decorative layer is formed by spraying high-gloss paint on the outside of the fiberglass board.
  • the high-gloss decorative layer formed by spraying high-gloss paint does not need to add an adhesive layer, and the thickness is relatively thin.
  • producing a fiberglass board containing at least the first fiberglass prepreg includes:
  • the fiberglass board includes a plurality of first fiberglass resin layers.
  • the fiberglass board includes multiple first fiberglass resin layers, which has higher structural strength.
  • the production method further includes:
  • the manufacturing method of producing a fiberglass board from a prepreg containing at least the first fiberglass prepreg includes:
  • the manufacturing method of providing a high-gloss decorative layer on the outside of the fiberglass board includes:
  • the high-gloss decorative layer is disposed on the outer side of the outermost first fiberglass resin layer.
  • the layer used to set the high-gloss decorative layer in the fiberglass board is the first fiberglass resin layer, so that the high-gloss decorative layer can be set on the first fiberglass resin layer with higher surface flatness. surface, thereby presenting a better high-gloss effect, and in other laminates not used for setting high-gloss decorative layers, a second fiberglass resin layer made of epoxy resin can be used.
  • Figure 1 is a schematic structural diagram of glass fiber prepreg in the prior art
  • Figure 2 is a schematic structural diagram of the first glass fiber resin layer provided by the embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a housing provided by an embodiment of the present application.
  • Figure 4 is a second structural schematic diagram of a housing provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram three of the housing provided by the embodiment of the present application.
  • Figure 6 is a schematic structural diagram 4 of a housing provided by an embodiment of the present application.
  • Figure 7 is a schematic structural diagram 5 of the housing provided by the embodiment of the present application.
  • Figure 8 is a schematic structural diagram six of the housing provided by the embodiment of the present application.
  • Figure 9 is a schematic structural diagram of the housing provided by the embodiment of the present application.
  • Figure 10 is a schematic structural diagram of the housing provided by the embodiment of the present application.
  • Figure 11 is a schematic flow chart of a method for manufacturing a casing provided by an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of another method for manufacturing a casing provided by an embodiment of the present application.
  • Fiberglass board 110. First fiberglass resin layer; 111. First resin; 112. First fiberglass fabric; 120. Second fiberglass resin layer; 200. High-gloss decorative layer.
  • glass fiber is the abbreviation of glass fiber.
  • the back cover of an electronic device i.e., battery cover
  • the fiberglass board is made of fiberglass prepreg.
  • the fiberglass prepreg The material is made by impregnating fiberglass cloth 2 with epoxy resin 1. Due to the large curing shrinkage rate of epoxy resin 1 during the thermal curing process, the woven texture of fiberglass cloth 2 leaks out from the surface of the fiberglass board after it is formed. This is not suitable for The appearance and process design of the battery cover poses great challenges. Since the surface flatness of the glass fiber prepreg made of epoxy resin 1 is poor, the outer surface of the battery cover is usually set to a matte effect.
  • the hot melt adhesive film is attached to one side of the fiberglass board, and the base fabric and PU skin are attached to the side of the hot melt adhesive film facing away from the fiberglass board.
  • the PU skin is located on the side of the base fabric facing away from the glass fiber board.
  • One side of the fiberboard, that is, the PU leather is located on the outermost side.
  • the hot-melt adhesive film, base fabric and PU leather are used to block the fiberglass woven texture on the surface of the fiberglass board, and the PU leather is used to form the appearance.
  • this setting method can block the fiberglass woven texture, because the PU leather needs a certain thickness of support, otherwise it will feel hard and the tactile comfort will be relatively poor. Therefore, more shielding is set up to provide sufficient support for the PU leather. layer, resulting in the battery cover being thicker (usually greater than 0.7mm) and heavy, and the PU leather has a matte texture, making it impossible to achieve a high-gloss appearance design.
  • a matte decorative film is bonded to one side of the fiberglass board through OCA (Optically Clear Adhesive). Since the thickness of the matte decorative film is greater than 0.2mm, it can block the fiberglass weave. texture, so the thickness of the battery cover is relatively large, and because the base material of the matte decorative diaphragm is usually PET (Polyethylene terephthalate, polyethylene terephthalate), its hardness is low, which will lead to process Increased difficulty, fit It is prone to wrinkles and blistering, and the manufacturing yield is low. In addition, the matte decorative diaphragm has a matte texture and cannot achieve a high-gloss appearance design.
  • matte paint is sprayed on one side of the fiberglass board, which gives a matte effect and cannot achieve a high-gloss appearance design.
  • the epoxy resin of the glass fiber prepreg is modified to increase the cross-linking degree of the epoxy resin after curing so that more epoxy resin can be retained to cover the glass during the hot pressing process. fiber surface, thereby reducing to a certain extent the visibility of the fiberglass texture caused by curing shrinkage.
  • this modified glass fiber prepreg is used as the outermost layer for appearance decoration.
  • this arrangement increases the thickness of the fiberglass prepreg, which increases the thickness of the battery cover it supports.
  • the overall structural strength of the fiberglass board weakens.
  • the woven glass fiber is prone to slipping during the production process, resulting in poor regional performance.
  • the modification of epoxy resin requires simultaneous improvement of the preparation process of the fiberglass board, making the process more complex.
  • the glass fiber of the fiberglass cloth is improved, and the fiberglass cloth with a smaller diameter is used to weave the fiberglass cloth to increase the weaving density of the fiberglass cloth and reduce the visibility of the fiberglass weaving pattern to the naked eye.
  • the use of glass fiber woven fiberglass cloth with a smaller diameter will lead to a significant increase in production costs, complicated processes, and reduced process efficiency.
  • the thickness of the glass fiber woven fiberglass cloth with a smaller diameter will be reduced, so its The structural strength is reduced, and multiple layers of fiberglass cloth need to be stacked to make fiberglass boards, which reduces manufacturing efficiency.
  • embodiments of the present application provide a housing, a manufacturing method thereof, and electronic equipment to solve the above-mentioned problems that trouble those skilled in the art.
  • the housing, its manufacturing method, and the electronic device provided by the embodiments of the present application will be explained in detail below.
  • this embodiment provides a casing, which is applied to an electronic device and can be used as the casing of the electronic device, or as a part of the casing of the electronic device. For example, it can be used as the casing of the electronic device. battery cover.
  • the shell includes a fiberglass board 100 and a high-gloss decorative layer 200.
  • the high-gloss decorative layer 200 is provided on the outer side of the fiberglass board 100.
  • the fiberglass board 100 includes at least one first fiberglass resin layer 110.
  • the first fiberglass resin layer 110 It is made of a first fiberglass prepreg.
  • the first fiberglass prepreg is formed by impregnating a first fiberglass fabric into a first resin 111.
  • the curing shrinkage rate of the first resin 111 is less than one percent.
  • the fiberglass board 100 is obtained by processing a plurality of first fiberglass prepregs. In the fiberglass board, the structure formed by the original first fiberglass prepregs is called the first fiberglass resin layer. 110.
  • a layer of first fiberglass prepreg is processed to form a layer of first fiberglass resin layer 110 .
  • the first glass fiber prepreg forms a semi-cured structure after being dried for a certain period of time.
  • the semi-cured structure is rolled into a sheet structure, and then dried again through several sheet structures to form a semi-cured structure.
  • a corresponding sheet structure in the fiberglass board is called a first fiberglass resin layer 110, that is, a first fiberglass resin layer is made of the first fiberglass fabric 112 impregnated with the first resin 111.
  • the structure formed after the first glass fiber prepreg is processed in several steps.
  • the shrinkage of the first resin 111 is less than one percent, the shrinkage of the first resin 111 is reduced when forming the first fiberglass resin layer 110 , that is, the first fiberglass resin layer 110
  • the surface flatness is relatively high, so there is no need to set up other additional shields to block the surface texture, directly on the first fiberglass resin layer
  • the high-gloss decorative layer 200 By disposing the high-gloss decorative layer 200 on the housing 110, a shell capable of exhibiting a high-gloss effect can be formed, and the thickness of the shell is relatively small.
  • the housing provided in this embodiment can be used as a battery cover of an electronic device, which means that the battery cover can achieve a high-gloss effect and have a small thickness.
  • the first fiberglass fabric 112 used to manufacture the shell can be a glass fiber woven fiberglass fabric with a conventional thickness, or a glass fiber fabric with a smaller diameter and a higher woven density.
  • the curing shrinkage of the first resin 111 is less than one percent, and is set in such a way that the first fiberglass resin layer 110 is made after processing the first fiberglass prepreg formed by the first resin 111 and the first fiberglass fabric 112
  • the glass fiber woven texture presented on the surface has low visibility, which means that the surface of the fiberglass board 100 including the first fiberglass resin layer 110 has a higher smoothness, which facilitates the formation of the high-gloss decorative layer 200 on the fiberglass board 100 .
  • the curing shrinkage rate of the first resin 111 is less than five thousandths, that is, the impact of the shrinkage of the first resin 111 during the curing process on the surface flatness of the fiberglass plate 100 is further reduced, and also That is, it is more conducive to ensuring that the surface of the fiberglass plate 100 meets higher flatness requirements, so that after the high-gloss decorative layer 200 is formed, a better high-gloss effect can be presented.
  • the first resin 111 is a benzoxazine resin or a modified resin thereof, a bismaleimide resin or a modified resin thereof.
  • the first resin 111 may also be a benzoxazine resin and a modified resin thereof.
  • the first resin 111 can also be other resin materials with a curing shrinkage rate of less than one percent or even less than five thousandths. The curing shrinkage of benzoxazine resin is almost zero, and the curing shrinkage of bismaleimide resin is less than 7 thousandths.
  • the mixed resin formed by mixing benzoxazine resin and bismaleimide resin The curing shrinkage rate is between zero and seven thousandths.
  • the curing shrinkage rate of the mixed resin will be closer to the curing shrinkage rate of the benzoxazine resin; if the mixed resin If the proportion of bismaleimide resin in the resin is higher, the curing shrinkage rate of the mixed resin will be closer to the curing shrinkage rate of the bismaleimide resin. That is to say, by adjusting the mass ratio of benzoxazine resin and cyclobismaleimide resin in the mixed resin, the curing shrinkage of the mixed resin of benzoxazine resin and epoxy resin can be less than one thousandth. five.
  • the first resin 111 can also be a mixed resin mixed with benzoxazine resin and bismaleimide resin
  • the first glass fiber resin The preparation process of the layer 110 is similar to the process of preparing the first fiberglass resin layer 110 using epoxy resin in conventional technology.
  • the original production equipment does not need to be replaced, and the original production equipment can be used to produce this embodiment. In the process flow of the provided shell, it is used as part of the production process to save costs.
  • the mass ratio of benzoxazine resin and bismaleimide resin can be 10%-90%, for example, The resin includes 10 parts of benzoxazine resin and 90 parts of bismaleimide resin; or, the mixed resin includes 20 parts of benzoxazine resin and 80 parts of bismaleimide resin; or, the mixed resin includes Including 40 parts of benzoxazine resin and 60 parts of bismaleimide resin; or, the mixed resin includes 90 parts of benzoxazine resin and 10 parts of bismaleimide resin; or other products that comply with benzoxazine resin
  • the mass ratio of resin and bismaleimide resin is a mixing scheme of 10%-90%.
  • the first resin 111 is a mixed resin of benzoxazine resin and epoxy resin.
  • the curing shrinkage of the mixed resin of benzoxazine resin and epoxy resin is less than one percent.
  • the mass ratio of benzoxazine resin and epoxy resin in the mixed resin can make the curing shrinkage of the mixed resin of benzoxazine resin and epoxy resin less than five thousandths.
  • the mass ratio of benzoxazine resin to epoxy resin can be 10%-90%.
  • the mixed resin includes 10 parts of benzoxazine resin and 90 parts of epoxy resin; or the mixed resin includes 30 parts of benzo oxazine resin and 70 parts epoxy resin; or, the mixed resin includes 60 parts benzoxazine resin and 40 parts epoxy resin; or, the mixed resin includes 90 parts of benzoxazine resin and 10 parts of epoxy resin; or other mixing solutions that meet the mass ratio of benzoxazine resin to epoxy resin of 10%-90%.
  • the mass ratio of benzoxazine resin to epoxy resin is 20%-30%.
  • Using a mixed resin of benzoxazine resin and epoxy resin as the first resin 111 can reduce the hot pressing time when preparing the glass fiber board 100, thereby improving the preparation efficiency.
  • the first resin 111 is a mixed resin of bismaleimide resin and epoxy resin
  • the curing shrinkage rate of the mixed resin of bismaleimide resin and epoxy resin is less than one percent.
  • the curing shrinkage of the mixed resin of bismaleimide resin and epoxy resin can be less than five thousandths.
  • the mass ratio of bismaleimide resin to epoxy resin can be 10%-90%.
  • the mixed resin includes 10 parts of bismaleimide resin and 90 parts of epoxy resin; or the mixed resin includes 25 parts bismaleimide resin and 75 parts epoxy resin; or, the mixed resin includes 50 parts bismaleimide resin and 50 parts epoxy resin; or, the mixed resin includes 90 parts bismaleimide resin Imine resin and 10 parts of epoxy resin; or other mixing solutions that meet the mass ratio of bismaleimide resin and epoxy resin at 10%-90%.
  • the mass ratio of bismaleimide resin to epoxy resin is 20%-30%.
  • Using a mixed resin of bismaleimide resin and epoxy resin as the first resin 111 can reduce the hot pressing time when preparing the glass fiber board 100, thereby improving the preparation efficiency.
  • the high-gloss decorative layer 200 can be a high-gloss film, and the high-gloss film is attached to one side of the fiberglass board 100 .
  • the high-gloss decorative layer 200 may be a high-gloss coating, which is formed by spraying high-gloss paint on one side of the fiberglass board 100 .
  • the fiberglass board 100 may be made of multiple layers of fiberglass prepreg stacks.
  • the multi-layered fiberglass prepregs are all first fiberglass resin layers 110 , that is, the fiberglass board 100 is manufactured by stacking multiple layers of first fiberglass resin layers 110 Become.
  • the multiple first glass fiber resin layers 110 can improve the structural strength and rigidity of the glass fiber board 100.
  • the production process of the multiple first glass fiber resin layers 110 is the same, which facilitates production and manufacturing. That is to say, the first fiberglass resin layer 110 produced by the same prepreg production line can be used as any layer of the fiberglass board 100, and multiple first fiberglass resin layers 110 produced by a prepreg production line can be stacked for use.
  • a prepreg production line takes up relatively little space.
  • the stacking number of the first glass fiber resin layer 110 can be selected according to the glass fiber diameter of the first glass fiber resin layer 110. As the glass fiber diameter decreases, the number of the first glass fiber resin layer 110 can be increased.
  • a glass fiber woven fiberglass fabric of moderate thickness is used to manufacture the first fiberglass resin layer 110 through the fiberglass fabric. Then the number of stacks of the first fiberglass resin layer 110 can be 3-5 layers. , which can make the stiffness and strength of the fiberglass board 100 relatively strong.
  • the thickness of the first fiberglass resin layer 110 is 0.08mm-0.10mm. Within the above thickness range, the first fiberglass resin layer 110 has a certain structural strength and rigidity at a relatively small thickness.
  • the thickness of the high-gloss decorative layer 200 is 0.05mm-0.08mm. Within the above thickness range, the high-gloss decorative layer 200 can block the outer surface of the first fiberglass resin layer 110 to present a better high-gloss effect.
  • the thickness of the high-gloss decorative layer 200 is 0.05mm, the thickness of the first fiberglass resin layer 110 is 0.08mm, and the first fiberglass resin layer 110 is three layers, then the minimum thickness of the housing is 0.29mm. If the thickness of the high-gloss decorative layer 200 is 0.08mm, the thickness of the first fiberglass resin layer 110 is 0.10mm, and the first fiberglass resin layer 110 is three layers, then the minimum thickness of the housing is 0.38mm. If the thickness of the high-gloss decorative layer 200 is 0.05mm, the thickness of the first fiberglass resin layer 110 is 0.08mm, and the first fiberglass resin layer 110 is five layers, then the minimum thickness of the housing is 0.45mm.
  • the thickness of the high-gloss decorative layer 200 is 0.08mm
  • the thickness of the first fiberglass resin layer 110 is 0.10mm
  • the first fiberglass resin layer 110 is five layers
  • the minimum thickness of the shell is 0.58mm.
  • the thickness of each of the above-mentioned cases is 0.12mm-0.41mm thinner than the thickness of the conventional battery cover (0.7mm).
  • the fiberglass board 100 further includes a second fiberglass resin layer 120 , and the curing shrinkage rate of the second fiberglass resin layer 120 is greater than that of the first fiberglass resin layer 110 .
  • Curing shrinkage the second fiberglass resin layer 120 includes a second fiberglass fabric and a second resin, which can optionally be achieved by making the curing shrinkage of the second resin greater than the curing shrinkage of the first resin.
  • the second fiberglass fabric is impregnated in the second resin to form a second fiberglass prepreg, and the fiberglass board 100 is formed by processing a plurality of second fiberglass prepregs and a plurality of first fiberglass prepregs.
  • the part of the structure formed by the first fiberglass prepreg is the first fiberglass resin layer 110
  • the part of the structure formed by the second fiberglass prepreg is the second fiberglass resin layer 120
  • the fiberglass board 100 is formed by processing multiple layers of stacked fiberglass prepregs.
  • the fiberglass board 100 includes at least one first layer of fiberglass resin 110 and at least one layer of second fiberglass resin layer 120.
  • the first fiberglass resin layer 110 is stacked on the outside of the second fiberglass resin layer 120
  • the high-gloss decorative layer 200 is located on the outside of the outermost first fiberglass resin layer 110 .
  • the outermost layer of the fiberglass board 100 that is, the layer used to set the high-gloss decorative layer 200 is the first fiberglass resin layer 110 , so that the high-gloss decorative layer 200 can be placed on a smooth surface.
  • the surface of the first fiberglass resin layer 110 has a higher degree of gloss, thereby presenting a better high-gloss effect.
  • a second fiberglass resin layer made of other materials can be used. 120.
  • the shell will have at least the following configuration:
  • the first arrangement method is: as shown in Figure 4, the first fiberglass resin layer 110 is one layer, and the second fiberglass resin layer 120 is three layers. Then the shell from one side to the other side (the direction shown in Figure 4 is from bottom to top) can be respectively: the first layer and the second fiberglass resin layer 120 - the second layer and the second fiberglass resin layer 120 - the third layer The second fiberglass resin layer 120 - the first fiberglass resin layer 110 - the high-gloss decorative layer 200.
  • the second arrangement mode is: the first fiberglass resin layer 110 and the second fiberglass resin layer 120 are two layers. Then the shell can have the following arrangement from one side to the other: 1 As shown in Figure 5, from bottom to top are the first layer of the first fiberglass resin layer 110 - the first layer of the second fiberglass resin layer 120 - The second layer of the second fiberglass resin layer 120 - the second layer of the first fiberglass resin layer 110 - the high-gloss decorative layer 200. 2As shown in Figure 6, from bottom to top, they are the first layer and the second fiberglass resin layer 120-the first layer of the first fiberglass resin layer 110-the second layer and the second fiberglass resin layer 120-the second layer and the first layer. Glass fiber resin layer 110-high gloss decorative layer 200.
  • the third arrangement mode is: the first fiberglass resin layer 110 is three layers, and the second fiberglass resin layer 120 is one layer. Then the shell can have the following arrangement from one side to the other: 1 As shown in Figure 8, from bottom to top they are the second fiberglass resin layer 120 - the first layer, the first fiberglass resin layer 110 - the second layer. The first fiberglass resin layer 110 - the third layer, the first fiberglass resin layer 110 - the high-gloss decorative layer 200. 2As shown in Figure 9, from bottom to top, they are the first layer of first fiberglass resin layer 110-the second layer of fiberglass resin 120-the second layer of first fiberglass resin layer 110-the third layer of first fiberglass resin. Layer 110 - High gloss decorative layer 200. 3As shown in Figure 10, from bottom to top, they are the first layer of first fiberglass resin layer 110 - the second layer of first fiberglass resin layer 110 - the second layer of fiberglass resin layer 120 - the third layer of first fiberglass resin Layer 110 - High gloss decorative layer 200.
  • the total number of the first fiberglass resin layer 110 and the second fiberglass resin layer 120 may be 3 to 5 layers.
  • the thicknesses of the first fiberglass resin layer 110 and the second fiberglass resin layer 120 are both between 0.05mm and 0.08mm.
  • the number of the first fiberglass resin layer 110 is at least two, and several first fiberglass resin layers 110 are included. After the two glass fiber resin layers 120 are stacked, At least one first fiberglass resin layer 110 is provided on both sides of the stacked second fiberglass resin layers 120 . With this arrangement, the flatness of both sides of the fiberglass plate 100 prepared from the first fiberglass resin layer 110 and the second fiberglass resin layer 120 is relatively high.
  • This embodiment provides a method for manufacturing a casing, which is used to manufacture the casing provided in the first embodiment. Since the housing provided in the above first embodiment can be used as a battery cover of an electronic device, the manufacturing method provided in this embodiment can also be used to manufacture a battery cover.
  • the manufacturing method of the housing provided in this embodiment includes:
  • the first resin is prepared to form a first prepolymer glue solution, and the curing shrinkage of the first resin is less than one percent;
  • Prepreg containing at least a first glass fiber prepreg is made into a fiberglass board, in which the first Boxin prepreg forms a first fiberglass resin layer, and the fiberglass board includes at least one layer of first glass fiber
  • the resin layer that is to say, the fiberglass board is processed by at least one layer of first fiberglass prepreg;
  • the shrinkage of the first resin is less than one percent, the shrinkage of the first resin is reduced when forming the first fiberglass resin layer, that is, the surface smoothness of the first fiberglass resin layer is improved. It is relatively high, so there is no need to set up other additional shields to block the surface texture.
  • a high-gloss decorative layer can be directly placed on the first fiberglass resin layer to form a shell that can exhibit a high-gloss effect. The thickness of the shell is relatively small.
  • the method for manufacturing a casing provided in this application can produce a casing with a high gloss effect and a small thickness.
  • the curing shrinkage of the first resin is less than five thousandths, that is, the impact of the shrinkage of the first resin during the curing process on the surface flatness of the fiberglass board is further reduced, that is, it is more It is beneficial to ensure that the surface of the fiberglass board meets higher flatness requirements, so that after the high-gloss decorative layer is formed, a better high-gloss effect can be presented.
  • the first resin can be benzoxazine resin or its modified resin, bismaleimide resin or its modified resin.
  • the first resin can also be benzoxazine resin and bismaleimide.
  • the first resin can also be For other resin materials whose curing shrinkage is less than one percent or even less than five thousandths.
  • the curing shrinkage of the mixed resin of benzoxazine resin and epoxy resin is less than 1%.
  • the mass ratio of benzoxazine resin and epoxy resin can make the curing shrinkage of the mixed resin of benzoxazine resin and epoxy resin less than five thousandths.
  • the mass ratio of benzoxazine resin to epoxy resin can be 10%-90%.
  • the mixed resin includes 10 parts of benzoxazine resin and 90 parts of epoxy resin; or the mixed resin includes 30 parts of benzo Oxazine resin and 70 parts of epoxy resin; or, the mixed resin includes 60 parts of benzoxazine resin and 40 parts of epoxy resin; or, the mixed resin includes 90 parts of benzoxazine resin and 10 parts of epoxy resin; Or other mixing solutions that meet the mass ratio of benzoxazine resin and epoxy resin between 10% and 90%.
  • the mass ratio of benzoxazine resin to epoxy resin is 20%-30%.
  • Using a mixed resin of benzoxazine resin and epoxy resin as the first resin 111 can reduce the hot pressing time when preparing the glass fiber board 100, thereby improving the preparation efficiency.
  • the curing shrinkage of the mixed resin of bismaleimide resin and epoxy resin is less than 1%.
  • the mass ratio to epoxy resin can make the curing shrinkage of the mixed resin of bismaleimide resin and epoxy resin less than five thousandths.
  • the mass ratio of bismaleimide resin to epoxy resin can be 10%-90%.
  • the mixed resin includes 10 parts of bismaleimide resin and 90 parts of epoxy resin; or the mixed resin includes 25 parts bismaleimide resin and 75 parts epoxy resin; or, the mixed resin includes 50 parts bismaleimide resin and 50 parts epoxy resin; or, the mixed resin includes 90 parts bismaleimide resin Imine resin and 10 parts of epoxy resin; or other mixing solutions that meet the mass ratio of bismaleimide resin and epoxy resin at 10%-90%.
  • the mass ratio of bismaleimide resin to epoxy resin is 20%-30%.
  • Using a mixed resin of bismaleimide resin and epoxy resin as the first resin 111 can reduce the hot pressing time when preparing the glass fiber board 100, thereby improving the preparation efficiency.
  • the process of preparing the first resin to form the first prepolymer glue specifically includes: placing the reaction liquid containing the first resin monomer and the curing agent in a reaction tank, and forming the first prepolymer glue at a set temperature and after a set time. Poly glue liquid.
  • the process of impregnating the first glass fiber fabric into the first prepolymer glue solution to form the first glass fiber prepreg specifically includes: drying the glass fiber fabric, and impregnating the dried glass fiber fabric with the first prepolymer glue solution , the glass fiber fabric impregnated with the first prepolymer glue solution is rolled through a hot roller into a layered structure with a set thickness, and the layered structure is placed in an oven at a set temperature for thermal curing treatment to form a semi-cured The first fiberglass prepreg.
  • producing a fiberglass board containing at least the first fiberglass prepreg includes:
  • first fiberglass prepregs Obtain a plurality of first fiberglass prepregs, stack the plurality of first fiberglass prepregs, and prepare a fiberglass board through the stacked plurality of first fiberglass prepregs, so that the fiberglass board includes a plurality of first fiberglass prepregs.
  • Fiberglass resin layer In the fiberglass board, a first fiberglass prepreg corresponds to a first fiberglass resin layer, and the first fiberglass resin layer is a fully cured first fiberglass prepreg.
  • the process of making the first fiberglass prepreg into a fiberglass board specifically includes: cutting the first fiberglass prepreg into a set size, and stacking multiple layers of the first fiberglass prepreg, The stacked multiple first fiberglass resin layers are put into a hot pressing mold for hot press molding, thereby forming a fiberglass board.
  • the process of providing a high-gloss decorative layer on the outside of the fiberglass board may specifically include: attaching a high-gloss film to the outside of the fiberglass board to form a high-gloss decorative layer, or spraying high-gloss paint on the outside of the fiberglass board to form a high-gloss decorative layer.
  • the casing can serve as a battery cover.
  • five specific embodiments are used to describe the optional process flow of the above-mentioned manufacturing method for manufacturing a battery cover with a high-gloss effect:
  • benzoxazine resin is used as the first resin to make the battery cover.
  • the making method may include:
  • bismaleimide resin is used as the first resin to make the battery cover.
  • the making method may include:
  • reaction solution containing bismaleimide resin monomer and curing agent Place the reaction solution containing bismaleimide resin monomer and curing agent in the reaction tank, and prepolymerize it at a temperature of 130°C-160°C for 3h-6h to form the first prepolymerized glue solution;
  • a mixed resin composed of benzoxazine resin and bismaleimide resin is used as the first resin to manufacture the battery cover.
  • the manufacturing method may include:
  • the reaction solution containing bismaleimide resin monomer, benzoxazine resin monomer and curing agent is placed in the reaction tank, heated and melted to form the first prepolymer glue solution; it is worth mentioning that benzoxazine
  • the mass ratio of oxazine resin monomer and bismaleimide resin monomer can be 10%-90%;
  • the heating temperature is 180°C
  • the pressure is 10MPa
  • the holding time is 3h-4h.
  • a glass fiber board is obtained.
  • the structure corresponding to the first layer of glass fiber prepreg is a layer of first layer.
  • a mixed resin of benzoxazine resin and epoxy resin is used as the first resin to make the battery cover.
  • the making method may include:
  • the reaction solution containing benzoxazine resin monomer, epoxy resin monomer and curing agent is placed in the reaction tank, heated and melted to form the first prepolymer glue solution; it is worth mentioning that the benzoxazine resin monomer
  • the mass ratio to the epoxy resin monomer can be 10%-90%, preferably 20%-30%;
  • the heating temperature is 180°C
  • the pressure is 10MPa
  • the pressure holding time is 1h-2h.
  • a glass fiber board is obtained.
  • the structure corresponding to the first layer of glass fiber prepreg is a layer of first layer.
  • a mixed resin mixed with bismaleimide resin and epoxy resin is used as the first resin to make the battery cover.
  • the making method may include:
  • the reaction solution containing bismaleimide resin monomer, epoxy resin monomer and curing agent is placed in the reaction tank, heated and melted to form the first prepolymer glue solution; it is worth mentioning that bismaleimide
  • the mass ratio of amine resin monomer and epoxy resin monomer can be 10%-90%, preferably 20%-30%;
  • the heating temperature is 180°C
  • the pressure is 10MPa
  • the pressure holding time is 1h-2h.
  • a glass fiber board is obtained.
  • the structure corresponding to the first layer of glass fiber prepreg is a layer of first layer.
  • the fiberglass board includes both a first fiberglass resin layer and a second fiberglass resin layer.
  • the manufacturing method of the shell also includes:
  • the production method of making the prepreg containing at least the first fiberglass prepreg into the fiberglass board includes:
  • first fiberglass prepreg Stack at least one layer of first fiberglass prepreg and at least one layer of second fiberglass prepreg so that the outermost fiberglass prepreg is the first fiberglass prepreg; stack the stacked glass fiber prepregs
  • the materials are prepared to form a fiberglass board, the first fiberglass prepreg in the fiberglass board forms a first fiberglass resin layer, and the second fiberglass prepreg forms a second fiberglass resin layer;
  • the production method of setting a high-gloss decorative layer on the outside of the fiberglass board includes:
  • the high-gloss decorative layer is disposed on the outer surface of the outermost first fiberglass resin layer.
  • the production process of the second glass fiber prepreg and the production process of the first glass fiber prepreg can be carried out at the same time; the production process of the first glass fiber prepreg can also be carried out first, and then the second glass fiber prepreg can be carried out.
  • the manufacturing process of fiber prepreg; or the manufacturing process of the second fiberglass prepreg is carried out first, and then the manufacturing process of the first fiberglass prepreg is carried out.
  • the curing shrinkage rate of the second resin is not required to be less than 1%, because the second fiberglass resin layer made of the second resin is located inside the first fiberglass resin layer, and the high-gloss decorative layer is located inside the first fiberglass resin layer.
  • the outer surface of the first fiberglass resin layer has a relatively high smoothness, so the high-gloss decorative layer disposed on the outside thereof can present a better high-gloss effect.
  • the second resin can be epoxy resin. Even if the surface of the second fiberglass resin layer made of epoxy resin exhibits a fiberglass woven texture, it will be blocked by the first fiberglass resin layer located outside it, so it will not It will affect the high-gloss effect of the outer surface of the high-gloss decorative layer provided outside the first fiberglass resin layer.
  • This embodiment provides an electronic device, including the housing provided in the first embodiment.
  • Electronic devices can be electronic paper, mobile phones, tablets, televisions, smart bracelets, smart watches, monitors, Electronic products or components with casings such as notebook computers and electronic photo frames are not limited in this embodiment.
  • the electronic device may include a display screen, a battery, and a housing, which may be the housing or a part of the housing.
  • the casing includes a middle frame and a battery cover, and the casing serves as the battery cover.
  • the middle frame is connected to the casing, the display screen is installed on the middle frame, the display area of the display screen faces away from the casing, and the battery is located between the display screen and the battery cover.
  • the shell of the electronic device provided in this embodiment is made of glass fiber prepreg using the first resin with a curing shrinkage rate of less than 1%, the surface flatness of the first glass fiber resin layer is relatively high, so there is no need to install other components.
  • the additional shielding object blocks the surface texture, and a high-gloss decorative layer is directly placed on the first fiberglass resin layer to form a shell that can exhibit a high-gloss effect.
  • the thickness of the shell is relatively small and the weight is relatively light, thus making the electronics
  • the overall thickness of the device is relatively small and lightweight.
  • the shell achieves the purpose of presenting a high-gloss effect on its surface on the basis of meeting the structural strength requirements, breaks through the technical barriers of shell appearance design, expands the design scope of the shell appearance design, and provides a shell with a high-gloss effect.
  • the structural strength requirement of the casing means that the casing needs to have a certain degree of structural strength and rigidity to provide protection for batteries and other components inside the electronic device.

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  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
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  • Manufacturing & Machinery (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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  • Microelectronics & Electronic Packaging (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente demande se rapporte au domaine technique des dispositifs électroniques et divulgue un dispositif électronique, un boîtier et un procédé de fabrication associé. Le boîtier comprend une plaque en fibre de verre (100) et une couche de décoration en surbrillance (200). La couche de décoration en surbrillance (200) est agencée sur la surface latérale externe de la plaque en fibre de verre (100). La plaque en fibre de verre (100) comprend au moins une première couche de résine de fibre de verre (110). La première couche de résine de fibre de verre (110) comprend une première résine (111) et un premier tissu de fibre de verre (112). Le taux de retrait de durcissement de la première résine (111) est inférieur à un pour cent. Le dispositif électronique comprend le boîtier et le procédé de fabrication de boîtier est utilisé pour fabriquer le boîtier. Puisque la plaque en fibre de verre (100) dans le boîtier est composée de la première résine présentant le faible taux de retrait de durcissement, la planéité de surface de la plaque en fibre de verre (100) est élevée et, ensuite, un effet de surbrillance plat est présenté après que la couche de décoration en surbrillance (200) est fournie. Puisqu'il n'est pas nécessaire de fournir en outre un objet de protection sur la surface de la plaque en fibre de verre (100), l'épaisseur totale du boîtier est petite.
PCT/CN2023/090904 2022-08-31 2023-04-26 Dispositif électronique, boîtier et procédé de fabrication associé WO2024045662A1 (fr)

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JP2019077158A (ja) * 2017-10-27 2019-05-23 凸版印刷株式会社 化粧シート、化粧板、化粧シートの製造方法、化粧板の製造方法
CN215897772U (zh) * 2021-08-13 2022-02-22 惠州市众力电子科技有限公司 一种带纹理的透明玻纤3d手机壳
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205915763U (zh) * 2016-07-13 2017-02-01 深圳正峰印刷有限公司 电子设备的外壳
CN106928478A (zh) * 2016-10-20 2017-07-07 蓝星（成都）新材料有限公司 一种苯并噁嗪树脂层压板的制备方法
JP2019077158A (ja) * 2017-10-27 2019-05-23 凸版印刷株式会社 化粧シート、化粧板、化粧シートの製造方法、化粧板の製造方法
CN108638729A (zh) * 2018-04-13 2018-10-12 Oppo广东移动通信有限公司 壳体及其制备方法、移动终端
CN215897772U (zh) * 2021-08-13 2022-02-22 惠州市众力电子科技有限公司 一种带纹理的透明玻纤3d手机壳
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