CN114083840A - Shell, preparation method thereof and electronic equipment - Google Patents
Shell, preparation method thereof and electronic equipment Download PDFInfo
- Publication number
- CN114083840A CN114083840A CN202010865991.5A CN202010865991A CN114083840A CN 114083840 A CN114083840 A CN 114083840A CN 202010865991 A CN202010865991 A CN 202010865991A CN 114083840 A CN114083840 A CN 114083840A
- Authority
- CN
- China
- Prior art keywords
- fiber
- reinforced resin
- layer
- fiber cloth
- resin layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
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- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
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- 230000008033 biological extinction Effects 0.000 description 2
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- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
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- 125000000623 heterocyclic group Chemical group 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
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- 229920006376 polybenzimidazole fiber Polymers 0.000 description 2
- 229920002577 polybenzoxazole Polymers 0.000 description 2
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- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
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Images
Classifications
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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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- 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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- 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
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- 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
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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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- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
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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
-
- 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
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- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
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- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B32B2457/00—Electrical equipment
Abstract
The present application provides a housing comprising: the first fiber reinforced resin layer comprises first fiber cloth and first resin wrapping the first fiber cloth, wherein the first fiber cloth is inorganic fiber cloth; and a second fiber-reinforced resin layer bonded to one side surface of the first fiber-reinforced resin layer; the second fiber reinforced resin layer comprises second fiber cloth and second resin wrapping the second fiber cloth, wherein the second fiber cloth is organic fiber cloth, and the second resin is light-transmitting resin. A preparation method of the shell and the electronic device are also provided.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a shell, a preparation method of the shell and electronic equipment.
Background
At present, many electronic devices use materials of various materials and colors as shells to achieve the appearance decoration effect and avoid the homogenization of modeling and configuration. The textile is the most diversified variety of appearance effect, and if the textile can be smoothly used on the shell of the electronic equipment, the product can obtain more diversified appearance effect.
Disclosure of Invention
In view of the above problems, the present application provides a housing, a housing manufacturing method, and an electronic device, where the housing can present an appearance of a textile and has good reliability.
The application provides a housing, including: the first fiber reinforced resin layer comprises first fiber cloth and first resin wrapping the first fiber cloth, wherein the first fiber cloth is inorganic fiber cloth; and a second fiber-reinforced resin layer bonded to one side surface of the first fiber-reinforced resin layer; the second fiber reinforced resin layer comprises second fiber cloth and second resin wrapping the second fiber cloth, wherein the second fiber cloth is organic fiber cloth, and the second resin is light-transmitting resin.
The application also provides a preparation method of the shell, which comprises the following steps: preparing a first fiber reinforced resin prepreg, wherein the first fiber reinforced resin prepreg comprises first fiber cloth and first semi-cured resin wrapping the first fiber cloth, and the first fiber cloth is inorganic fiber cloth; preparing a second fiber reinforced resin prepreg, wherein the second fiber reinforced resin prepreg comprises a second fiber cloth and second semi-curing resin wrapping the second fiber cloth, and the second fiber cloth is organic fiber cloth; superposing the first fiber reinforced resin prepreg sheet and the second fiber reinforced resin prepreg sheet to form a superposed prepreg sheet; hot-press molding the superposed prepreg to cure the first semi-cured resin to form a first resin, cure the first fiber-reinforced resin prepreg to form a first fiber-reinforced resin layer, cure the second semi-cured resin to form a second resin, and cure the second fiber-reinforced resin prepreg to form a second fiber-reinforced resin layer, thereby obtaining the housing; wherein the second resin is a light-transmitting resin.
The present application further provides an electronic device comprising a housing as described above.
In the shell, the shell preparation method and the electronic device of the embodiment of the application, the first fiber cloth of the first fiber reinforced resin layer is inorganic fiber cloth, so that the shell has better mechanical strength, and the first fiber reinforced resin layer has better mechanical strength, so that the first fiber reinforced resin layer can replace a base material layer for manufacturing the shell in the prior art and exists as a support layer in the shell; furthermore, the second fiber cloth of the second fiber reinforced resin layer is organic fiber cloth, has good textile texture, can be used as an appearance layer of the shell and has good appearance effect; in addition, the second fiber cloth of the second fiber reinforced resin layer is organic fiber cloth and has better flexibility than inorganic fiber cloth, so that the phenomena of burrs, breakage and the like are not easy to occur; in addition, the second fiber cloth is wrapped by second resin, the second resin can protect the second fiber cloth, the problem that the second fiber cloth is poor in reliability in the using process is solved, and the second fiber reinforced resin layer has good performances of wear resistance, dirt resistance, ultraviolet aging resistance, cosmetics resistance, alcohol resistance, hand sweat resistance, high temperature and high humidity resistance and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural diagram of a housing according to a first embodiment of the present application.
Fig. 2 is a schematic flow chart of a method for manufacturing a housing according to a second embodiment of the present disclosure.
Fig. 3 is a schematic flow chart of a method for preparing a fiber reinforced resin prepreg sheet in a housing according to a second embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of an electronic device according to a third embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present application, and a detailed description of the like parts is omitted in different embodiments for the sake of brevity.
The first embodiment of the present application provides a shell, which includes a first fiber reinforced resin layer, where the first fiber reinforced resin layer includes a first fiber cloth and a first resin wrapping the first fiber cloth, and the first fiber cloth is an inorganic fiber cloth; and a second fiber-reinforced resin layer bonded to one side surface of the first fiber-reinforced resin layer; the second fiber reinforced resin layer comprises second fiber cloth and second resin wrapping the second fiber cloth, wherein the second fiber cloth is natural organic fiber cloth or artificial organic fiber cloth, and the second resin is light-transmitting resin.
In the shell in the embodiment of the application, the first fiber cloth of the first fiber reinforced resin layer is inorganic fiber cloth, so that the shell has better mechanical strength, and the first fiber reinforced resin layer has better mechanical strength, so that the first fiber reinforced resin layer can replace a base material layer for manufacturing the shell in the prior art and exists as a support layer in the shell; furthermore, the second fiber cloth of the second fiber reinforced resin layer is organic fiber cloth, has good textile texture, can be used as an appearance layer of the shell and has good appearance effect; in addition, the second fiber cloth of the second fiber reinforced resin layer is organic fiber cloth and has better flexibility than inorganic fiber cloth, so that the phenomena of burrs, breakage and the like are not easy to occur; in addition, the second fiber cloth is wrapped by second resin, the second resin can protect the second fiber cloth, the problem that the second fiber cloth is poor in reliability in the using process is solved, and the second fiber reinforced resin layer has good performances of wear resistance, dirt resistance, ultraviolet aging resistance, cosmetics resistance, alcohol resistance, hand sweat resistance, high temperature and high humidity resistance and the like.
Referring to fig. 1, a housing 100 according to a first embodiment of the present disclosure is provided, in which the housing 100 includes a first fiber-reinforced resin layer 10 and a second fiber-reinforced resin layer 20.
The first fiber reinforced resin layer 10 includes a first fiber cloth 11 and a first resin 12 wrapping the first fiber cloth.
The first fiber cloth 11 may be an inorganic fiber cloth.
In a more preferred embodiment, the first fiber cloth 11 is a glass fiber cloth, such as a fiber cloth formed by ordinary glass fiber, alkali-free glass fiber, high-strength high-modulus glass fiber, quartz glass fiber, high-silica glass fiber, and the like; the cable has the advantages of high mechanical strength, simple and mature manufacturing process, low cost, no interference to signals, no toxicity and the like; more preferably, the first fiber cloth 11 is an alkali-free glass fiber cloth.
In other embodiments, the first fiber cloth 11 may also be a fiber cloth formed of carbon fibers, graphite fibers, asbestos fibers, basalt fibers, silicon carbide fibers, chemical vapor deposition silicon carbide fibers, precursor-process silicon carbide fibers, zirconia fibers, alumina fibers, silicon nitride fibers, boron fibers, titanium boride fibers, boron carbide fibers, aluminum zirconate fibers, aluminum silicate fibers, potassium titanate fibers, or two-component composite fibers.
The first resin 12 may be epoxy, phenolic, polyamide, polyimide, polyurethane, or the like.
The epoxy resin has high adhesive property, good corrosion resistance, good process property, excellent physical and mechanical properties, excellent toughness, lower curing shrinkage and lower cost; therefore, in a preferred embodiment, the first resin 12 is an epoxy resin.
In some embodiments, the epoxy resin may be formed by mixing and curing the following raw materials:
dimethylformamide, 53 to 66 parts;
ethylene glycol methyl ether, 40 to 50 parts;
dicyandiamide, 36 to 55 parts;
100.8 to 148.5 portions of epoxy resin;
2-methylimidazole, 13 to 16 parts.
In some embodiments, the number of the first fiber reinforced resin layers 10 is 3 or more, and each of the first fiber reinforced resin layers 10 is stacked to ensure the mechanical strength of the housing 100.
The first fiber cloth of the first fiber reinforced resin layer presents a difference in the radial and weft directions due to the weaving process, and the radial and weft directions have different mechanical properties; preferably, the radial direction and the latitudinal direction of the first fiber cloth of the first fiber reinforced resin layer 10 of the adjacent layer are staggered, that is, if the radial direction of one first fiber reinforced resin layer 10 is the first direction and the latitudinal direction is the second direction, the radial direction of the other first fiber reinforced resin layer 10 adjacent to the first fiber reinforced resin layer 10 is arranged along the second direction, and the latitudinal direction is arranged along the first direction, namely staggered, so that when the plurality of layers of the first fiber reinforced resin layers 10 are stacked, the difference of the first fiber reinforced resin layers 10 is maximally reduced, the reliability of the first fiber reinforced resin layers 10 on the whole stacked layers is better, and the warp and other defects are not easy to occur when the heat, the humidity and the like are encountered.
In some embodiments, the first fiber cloth 11 has a thickness of approximately 0.1 mm, and the number of layers of the first fiber-reinforced resin layer is 3, 4, or 5; the reason why the thickness is substantially equal here is that the thickness of the industrial fiber cloth is not generally an integer value, and the thickness of the fiber cloth of the same specification varies to some extent depending on the raw material, the manufacturer, and the like.
In the present application, the second fiber reinforced resin layer 20 is bonded to one side surface of the first fiber reinforced resin layer 10; the second fiber reinforced resin layer 20 includes a second fiber cloth 21 and a second resin 22 wrapping the second fiber cloth.
The second fiber cloth can be organic fiber cloth, for example, natural organic fiber cloth or artificial organic fiber cloth, or blended cloth of natural organic fiber and artificial organic fiber; the natural organic fiber is animal hair, silk, cotton, hemp, bamboo fiber, etc.; artificial organic fibers such as rayon, artificial wool, artificial cotton and other artificial fibers; the organic fiber cloth can be woven cloth or knitted cloth.
In some embodiments, the man-made organic fibers may be, for example, polyolefin fibers, ultra-high molecular weight polyethylene fibers, polypropylene fibers, polytetrafluoroethylene fibers, polyacrylonitrile fibers, polyamide fibers, polyimide fibers, polyaramide pulp, polyester fibers, polyarylate fibers, polyaromatic heterocyclic fibers, polyphenolic fibers, polybenzimidazole fibers, polybenzothiazole fibers, polyphenylenebenzobisoxazole fibers, polyetheretherketone fibers, and the like; preferably, the artificial organic fiber is selected to meet the environmental protection requirement of European Union.
In some embodiments, the second resin 22 is a light-transmitting resin, so that the texture of the second fiber cloth 21 can be penetrated from the second resin 22, that is, the second fiber-reinforced resin layer 20 can exhibit the texture of a textile; preferably, the light transmittance of the second resin 22 is greater than 50%, so that the second resin 22 has a good light transmittance effect; more preferably, the light transmittance of the second resin 22 is greater than 90%, thereby exhibiting a very strong sense of transparency; wherein the light transmittance of the second resin 22 may be selected according to design requirements.
In some embodiments, the second resin 22 may also be a colored transparent resin, such as red, blue, green, etc., so that the second fiber reinforced resin layer 20 has a certain color to enhance the aesthetic feeling.
The second resin 22 may be a thermosetting resin, such as epoxy, phenolic, polyamide, polyimide, polyurethane, and the like.
In some embodiments, the material and composition of the second resin 22 and the material and composition of the first resin 12 may be the same for better consistency; for example, the housing 100 may be formed by stacking a first fiber reinforced resin prepreg and a first fiber reinforced resin prepreg, hot-pressing the stacked first fiber reinforced resin prepreg, curing the first fiber reinforced resin prepreg to form a first fiber reinforced resin layer, curing the second fiber reinforced resin prepreg to form a second fiber reinforced resin layer, and since the first resin and the second resin have the same material and composition as each other due to the flow of the resin during hot-pressing, the first resin and the second resin are melted at the bonding portion between the first fiber reinforced resin layer and the second fiber reinforced resin layer, that is, the first fiber reinforced resin layer and the second fiber reinforced resin layer of the housing 100 of this embodiment are completely melted without any boundary therebetween, so that the interlayer bonding force of the housing 100 is very good, the consistency is very good, and the reliability is extremely high.
It is understood that the second resin 22 may be formed by adding a small amount of coloring material more than the first resin 12, so that the second resin 22 has a uniform color with respect to the first resin 12.
Of course, a coloring material may be added to both the second resin 22 and the first resin 12.
In some embodiments, the housing 100 further includes a hardened layer 30 formed on a surface of the second fiber reinforced resin layer 20 on a side away from the first fiber reinforced resin layer 10.
In some embodiments, the hardened layer 30 may be formed by photo-curing a UV-type curing agent; for example, the hardened layer 30 may be formed by spraying a mixture of a UV-type curing agent and a volatile solvent on the surface of the second fiber reinforced resin layer 20, and then baking and photocuring the mixture; the hardened layer 30 formed by curtain coating has uniform surface thickness, natural microscopic surface structure and better surface brightness.
In some embodiments, the stiffening layer 30 has a thickness of 8 to 10 microns.
The hardened layer 30 is located on the outer surface of the housing 100; in some embodiments, the surface hardness of the hardened layer 30 is 3H to 5H, so that the hardened layer 30 has better scratch, abrasion and fingerprint resistant properties, thereby effectively protecting the second fiber reinforced resin layer 20 and making the surface of the housing 100 wear, scratch and fingerprint resistant.
In some embodiments, the housing 100 further includes a cover bottom layer 40 formed on a surface of the first fiber reinforced resin layer 10 away from the second fiber reinforced resin layer 20.
In some embodiments, the cover bottom layer 40 may be formed for paint curing; for example, the cover bottom layer 40 may be formed by spraying paint on the surface of the first fiber reinforced resin layer 10 and then baking and curing the paint; the thickness of the surface of the cover bottom layer 40 formed by spraying is uniform.
In some embodiments, the thickness of the cap underlayer 40 is 15 microns to 30 microns.
The cover bottom layer 40 is used for shielding and protecting the first fiber reinforced resin layer 20; the bottom cover layer 40 is located on the inner surface of the casing 100, some components are generally accommodated in the casing 100, and the bottom cover layer 40 can shield the components, so that the components cannot be seen from the outer side of the casing 100, and the casing 100 is attractive in appearance.
The inner surface of the housing 100 may be mounted with some components, and therefore, in some embodiments, the dyne value of the bottom cover layer 40 is greater than 32, so that the bottom cover layer 40 has better wettability, thereby facilitating the mounting of components on the bottom cover layer 40.
The housing 100 may be a flat plate, a cylinder, a frame, etc., and is provided according to design requirements, which is not limited in the present application.
In some embodiments, as shown in fig. 1, the housing 100 includes a bottom plate 101 and a side plate 102 (a part of the side plate in the figure) connected to the bottom plate 101 in a substantially perpendicular manner; the bottom plate 101 and the side plate 102 enclose to form an accommodating cavity 103, and the accommodating cavity 103 is used for accommodating components; the first fiber reinforced resin layer 10 is closer to the inner wall of the accommodating cavity 103 than the second fiber reinforced resin layer 20, or the second fiber reinforced resin layer 20 is closer to the outer surface of the housing 100, so that the textile texture of the second fiber reinforced resin layer 20 can be presented on the appearance surface of the housing 100.
Referring to fig. 2, a second embodiment of the present application provides a method for manufacturing a housing, including:
s201, preparing a first fiber reinforced resin prepreg, wherein the first fiber reinforced resin prepreg comprises first fiber cloth and first semi-cured resin wrapping the first fiber cloth, and the first fiber cloth is inorganic fiber cloth;
s202, preparing a second fiber reinforced resin prepreg, wherein the second fiber reinforced resin prepreg comprises a second fiber cloth and second semi-curing resin wrapping the second fiber cloth, and the second fiber cloth is organic fiber cloth;
s203, overlapping the first fiber reinforced resin prepreg and the second fiber reinforced resin prepreg to form an overlapped prepreg;
s204, carrying out hot press molding on the superposed prepreg, so as to cure the first semi-cured resin to form a first resin, cure the first fiber reinforced resin prepreg to form a first fiber reinforced resin layer, cure the second semi-cured resin to form a second resin, and cure the second fiber reinforced resin prepreg to form a second fiber reinforced resin layer, thereby obtaining the shell; wherein the second resin is a light-transmitting resin.
The first fiber cloth is, for example, a fiber cloth formed of carbon fibers, vapor grown carbon fibers, glass fibers, alkali-free glass fibers, high-strength high-modulus glass fibers, quartz glass fibers, high-silica glass fibers, asbestos fibers, basalt fibers, silicon carbide fibers, chemical vapor deposition silicon carbide fibers, precursor method silicon carbide fibers, zirconia fibers, alumina fibers, silicon nitride fibers, boron fibers, titanium boride fibers, boron carbide fibers, aluminum zirconate fibers, aluminum silicate fibers, potassium titanate fibers, two-component composite fibers, or graphite fibers.
In a preferred embodiment, the first fiber cloth is glass fiber cloth, and has the advantages of high mechanical strength, simple and mature manufacturing process, low cost and the like; more preferably, the first fiber cloth is alkali-free glass fiber cloth.
The first resin may be a thermosetting resin, such as epoxy, phenolic, polyamide, polyimide, polyurethane, and the like.
The epoxy resin has high adhesive property, good corrosion resistance, good process property, excellent physical and mechanical properties, excellent toughness, lower curing shrinkage and lower cost; therefore, in a preferred embodiment, the first resin is an epoxy resin.
In some embodiments, the epoxy resin may be formed by mixing and curing the following raw materials:
dimethylformamide, 53 to 66 parts;
ethylene glycol methyl ether, 40 to 50 parts;
dicyandiamide, 36 to 55 parts;
100.8 to 148.5 portions of epoxy resin;
2-methylimidazole, 13 to 16 parts.
In some embodiments, the number of the first fiber reinforced resin layers is 3 or more, and each of the first fiber reinforced resin layers is arranged in a stacked manner to ensure the mechanical strength of the shell.
The first fiber cloth of the first fiber reinforced resin layer presents a difference in the radial and weft directions due to the weaving process, and the radial and weft directions have different mechanical properties; preferably, the first fiber cloth of the first fiber reinforced resin layer of adjacent layer is arranged in a staggered manner in the radial direction and the latitudinal direction, that is, if the radial direction of a first fiber reinforced resin layer is the first direction and the latitudinal direction is the second direction, the radial direction of another first fiber reinforced resin layer adjacent to the first fiber reinforced resin layer is arranged in the second direction, and the latitudinal direction is arranged in the first direction, namely, staggered, so that the multilayer is achieved when the first fiber reinforced resin layer is arranged in a stacked manner, each difference of the first fiber reinforced resin layer is maximally reduced, and the overall reliability of the first fiber reinforced resin layer is better, and the first fiber reinforced resin layer is not easy to warp and the like when being heated and wetted.
In some embodiments, the first fiber cloth has a thickness of approximately 0.1 mm, and the number of layers of the first fiber-reinforced resin layer is 3, 4, or 5; the reason why the thickness is approximate here is that the thickness of the inner fiber cloth is generally not an integer value, and therefore, it is described as an approximate value here.
The second fiber cloth may be, for example, a natural organic fiber cloth or an artificial organic fiber cloth, or a blended cloth of natural organic fibers and artificial organic fibers; the natural organic fiber is animal hair, silk, cotton, hemp, bamboo fiber, etc.; artificial organic fibers such as rayon, artificial wool, artificial cotton and other artificial fibers; the organic fiber cloth can be woven cloth or knitted cloth.
In some embodiments, the man-made organic fibers may be, for example, polyolefin fibers, ultra-high molecular weight polyethylene fibers, polypropylene fibers, polytetrafluoroethylene fibers, polyacrylonitrile fibers, polyamide fibers, polyimide fibers, polyaramide pulp, polyester fibers, polyarylate fibers, polyaromatic heterocyclic fibers, polyphenolic fibers, polybenzimidazole fibers, polybenzothiazole fibers, polyphenylenebenzobisoxazole fibers, polyetheretherketone fibers, and the like.
In some embodiments, the second resin is a light-transmissive resin, so that the texture of the second fiber cloth can be transmitted out of the second resin, that is, the second fiber-reinforced resin layer can exhibit the texture of a textile; preferably, the light transmittance of the second resin is more than 50% so that the second resin has a good light transmittance effect; more preferably, the second resin has a light transmittance of more than 90%, thereby exhibiting a very strong sense of transparency; wherein the light transmittance of the second resin may be selected according to design requirements.
In some embodiments, the second resin may also be a colored light-transmitting resin, such as red, blue, green, etc., so that the second fiber-reinforced resin layer has a certain color to enhance the aesthetic feeling.
The second resin may be a thermosetting resin, such as epoxy, phenolic, polyamide, polyimide, polyurethane, and the like.
In some embodiments, the material and composition of the second resin may be the same as the material and composition of the first resin for better consistency; in some embodiments, the housing may be formed by stacking a first fiber reinforced resin prepreg and a first fiber reinforced resin prepreg, hot-pressing the stacked first fiber reinforced resin prepreg, curing the first fiber reinforced resin prepreg to form a first fiber reinforced resin layer, curing the second fiber reinforced resin prepreg to form a second fiber reinforced resin layer, and the first resin and the second resin are melted at a bonding portion of the first fiber reinforced resin layer and the second fiber reinforced resin layer due to a flow of the resin during the hot-pressing, and the first resin and the second resin have the same material and composition, that is, the first fiber reinforced resin layer and the second fiber reinforced resin layer of the housing of this embodiment are completely melted without a boundary therebetween, so that a bonding force between layers of the housing is very good, the consistency is very good, and the reliability is extremely high.
It is understood that the second resin may be added with a smaller amount of the coloring material than the first resin, so that the second resin has a uniform color with the first resin.
Of course, a coloring material may be added to both the second resin and the first resin.
Referring to fig. 3, the method for preparing the first fiber-reinforced resin prepreg and the second fiber-reinforced resin prepreg may include the steps of:
s301, preparing a resin glue solution;
s302, dipping the fiber cloth in the resin glue solution for gum dipping;
s303, baking the fiber cloth after gum dipping until the resin is in a semi-cured state to obtain the fiber reinforced resin prepreg.
In some embodiments, the preparation method of the resin glue solution may include the following steps:
providing 50-60 parts of dimethylformamide and 40-50 parts of ethylene glycol monomethyl ether, and mixing and stirring to form a mixed solvent;
adding dicyandiamide, which is 0.4 to 0.5 times of the weight of the mixed solvent, into the mixed solvent, and stirring for dissolving to obtain a dicyandiamide mixed solvent;
providing epoxy resin which is 0.8 to 0.9 time of the weight of the dicyandiamide mixed solvent, adding the epoxy resin into the dicyandiamide mixed solvent, and stirring and mixing to obtain a first solution;
providing 13-16 parts of 2-methylimidazole, adding 3-6 parts of dimethylformamide into the 2-methylimidazole, and uniformly stirring to obtain a second solution;
adding the second solution into the first solution, and uniformly stirring to obtain a third solution;
standing the third solution at room temperature for 8 hours for curing to obtain the resin glue solution.
In some embodiments, the resin glue solution can be placed in a glue applying tank of a glue applicator, the fiber cloth is uncoiled and enters the glue applying tank through a guide roller, the glue applicator is started to glue the fiber cloth, and after glue application, the resin applying content of the fiber cloth is controlled by adjusting a gap (set at 0.1-0.15mm) of a glue extruding roller.
In some embodiments, the resin is in a semi-cured state by removing volatiles such as solvents mainly by adjusting the temperature, air volume and vehicle speed.
In some embodiments, the impregnated fiber is arranged in an oven, and the temperature of three temperature zones of the oven is adjusted: the first section is 125-130 degrees, the second section is 100-110 degrees, the third section is 150-160 degrees, the air quantity of the oven is adjusted: adjusting the vehicle speed to be 0.8-1.2 m/h at 18-20 cubic meters/h; and obtaining the fiber reinforced resin prepreg.
In some embodiments, the method of thermoforming the laminated prepreg sheet may include:
providing a mould and heating the mould to 180 degrees plus or minus 5 degrees; wherein the shape and the size of the die cavity of the die are consistent with the shape and the size of the shell to be formed;
placing the laminated prepreg sheet in the mold;
closing the die and maintaining the pressure for 2 minutes, wherein the pressure is set to be 2-3 MPa;
and opening the die and blanking to obtain the shell.
The housing may be a flat plate, a cylinder, a frame, etc., and is provided according to design requirements, which is not limited in the present application.
In some embodiments, as shown in fig. 1, the housing 100 includes a bottom plate 101 and a side plate 102 connected to the bottom plate 101 substantially perpendicularly; the bottom plate 101 and the side plate 102 enclose to form an accommodating cavity 103, and the accommodating cavity 103 is used for accommodating components; the first fiber reinforced resin layer 10 is closer to the inner wall of the accommodating cavity 103 than the second fiber reinforced resin layer 20, or the second fiber reinforced resin layer 20 is closer to the outer surface of the housing 100, so that the textile texture of the second fiber reinforced resin layer 20 can be presented on the appearance surface of the housing 100.
In some embodiments, referring to fig. 2, after the step of thermoforming the laminated prepreg sheet, the method for manufacturing the housing further includes the steps of:
s205, forming a hardened layer on the surface of the second fiber reinforced resin layer far away from the first fiber reinforced resin layer.
In some embodiments, the hardened layer may be formed by photo-curing a UV type curing agent.
In some embodiments, the step of forming the hardened layer may include:
providing a mixed solution of a UV type curing agent and a volatile solvent;
spraying the mixed solution on the surface of one side, far away from the first fiber reinforced resin layer, of the second fiber reinforced resin layer, so that the mixed solution uniformly flows from the upper end to the lower end of the second fiber reinforced resin layer under the action of gravity;
baking and photocuring the mixed solution to form the hardened layer.
The hardened layer formed by curtain coating has uniform surface thickness, natural microscopic surface structure and better surface brightness.
In some embodiments, the stiffening layer has a thickness of 8 to 10 microns.
In the present application, the hardened layer is located on an outer surface of the housing; in some embodiments, the surface hardness of the hardened layer is 3H to 5H, so that the hardened layer has better scratch, abrasion and fingerprint resistance, thereby effectively protecting the second fiber reinforced resin layer and making the surface of the shell wear, scratch and fingerprint resistance.
In some embodiments, referring to fig. 2, after the step of thermoforming the laminated prepreg sheet, the method for manufacturing the housing further includes the steps of:
and S206, forming a cover bottom layer on the surface of one side, away from the second fiber reinforced resin layer, of the first fiber reinforced resin layer.
Before or after the hardened layer is formed, the cover substrate layer may be formed, and is not limited to the written order in the drawings.
In some embodiments, the cover bottom layer may be formed for paint curing.
In some embodiments, the step of forming the cap underlayer may comprise:
providing a paint coating;
spraying the paint coating on the surface of one side, away from the second fiber reinforced resin layer, of the first fiber reinforced resin layer;
baking and curing to form the cover bottom layer.
In general, the temperature for baking and curing is preferably about 80 degrees celsius, and the time is preferably about 30 minutes; the baking and curing parameters mainly depend on the material of the paint, and the baking and curing conditions of the paint commonly used in the industry are provided in the application, and certainly, the baking and curing conditions of the paint can not be limited by the application; the surface thickness of the cover bottom layer formed by spraying is uniform, and of course, the cover bottom layer can be formed by other methods, but not limited to this.
In some embodiments, the thickness of the cover bottom layer is 15 to 30 microns.
In the present application, the cover bottom layer is used for shielding light and protecting the first fiber reinforced resin layer; the bottom cover layer is located the internal surface of casing, some components and parts can generally be acceptd in the casing, set up the bottom cover layer can shelter from components and parts, makes the follow the outside of casing can not see components and parts, thereby makes the outward appearance of casing is comparatively pleasing to the eye.
The inner surface of the housing may be attached with some components, and therefore, in some embodiments, the dyne value of the cover substrate is greater than 32, so that the cover substrate has better wettability, and thus components can be attached on the cover substrate more easily.
In some embodiments, referring to fig. 2, after the step of forming the hardened layer and the bottom cover layer after the step of hot press forming the laminated prepreg, the method for manufacturing the housing further includes the steps of:
and S207, carrying out CNC (computer numerical control) shape machining on the sheet after the hot-press forming to obtain the shell.
As shown in fig. 4, the third embodiment of the present application further provides an electronic device 400, and the electronic device 300 includes the housing 100 according to the first embodiment of the present application.
In some embodiments, the housing 100 may be, for example, a battery back cover of the electronic device 400.
In some embodiments, the housing 100 includes an outer surface 110, the outer surface 110 is also an outer surface of the housing 100, in this application, the second fiber reinforced resin layer 20 is closer to the outer surface 110 than the first fiber reinforced resin layer 10, the textile texture of the second fiber reinforced resin layer 20 can penetrate from the outer surface 110, and thus, the electronic device 400 can have the textile textured outer surface 110.
In some embodiments, the electronic device 400 is a portable, mobile computing device, wearable device, etc., such as a smartphone, laptop, tablet, gaming device, etc.
The second fiber-reinforced resin layer and the housing of the present invention will be described below with reference to specific examples.
Example 1
Preparing a first fiber reinforced resin prepreg, wherein the first fiber reinforced resin prepreg comprises first fiber cloth and first semi-cured resin wrapping the first fiber cloth, the first fiber cloth is glass fiber cloth, and the first semi-cured resin is semi-cured epoxy resin;
preparing a second fiber reinforced resin prepreg, wherein the second fiber reinforced resin prepreg comprises a second fiber cloth and second semi-curing resin wrapping the second fiber cloth, the second fiber cloth is cotton-wool blended fiber cloth, and the second semi-curing resin and the first semi-curing resin have the same components;
sequentially laminating three layers of the first fiber reinforced resin prepreg and one layer of the second fiber reinforced resin prepreg to form a laminated prepreg;
hot press molding the superimposed prepreg to cure the first semi-cured resin to form a first resin, cure the first fiber-reinforced resin prepreg to form a first fiber-reinforced resin layer, cure the second semi-cured resin to form a second resin, and cure the second fiber-reinforced resin prepreg to form a second fiber-reinforced resin layer; wherein the second resin is a light-transmitting resin;
forming a hardened layer and a bottom covering layer on the surface of the sheet after hot press forming to obtain the shell; wherein the hardened layer is formed on the second resin surface, and the cover bottom layer is formed on the first resin surface.
The surface texture of the case in example 1 was observed, and the case in example 1 was subjected to flame retardancy, steel wool abrasion resistance, stain resistance test, surface hardness, artificial sweat test.
Example 2
Preparing a first fiber reinforced resin prepreg, wherein the first fiber reinforced resin prepreg comprises first fiber cloth and first semi-cured resin wrapping the first fiber cloth, the first fiber cloth is glass fiber cloth, and the first semi-cured resin is semi-cured epoxy resin;
preparing a second fiber reinforced resin prepreg, wherein the second fiber reinforced resin prepreg comprises a second fiber cloth and second semi-curing resin wrapping the second fiber cloth, the second fiber cloth is cotton-wool blended fiber cloth, and the second semi-curing resin and the first semi-curing resin have the same components;
sequentially laminating three layers of the first fiber reinforced resin prepreg and one layer of the second fiber reinforced resin prepreg to form a laminated prepreg;
hot press molding the superimposed prepreg to cure the first semi-cured resin to form a first resin, cure the first fiber-reinforced resin prepreg to form a first fiber-reinforced resin layer, cure the second semi-cured resin to form a second resin, and cure the second fiber-reinforced resin prepreg to form a second fiber-reinforced resin layer; wherein the second resin is a light-transmitting resin to obtain the housing.
The surface texture of the case in example 2 was observed, and the case in example 2 was subjected to flame retardancy, steel wool abrasion resistance, stain resistance test, surface hardness, artificial sweat test.
Comparative example 1
Providing a base material layer, wherein the base material layer is made of resin;
providing a fiber cloth, wherein the fiber cloth is a cotton and wool blended fiber cloth;
and providing an adhesive, and adhering the fiber cloth to the surface of the base material layer to form the shell.
The case of comparative example 1 was observed for surface texture and the case of comparative example 1 was subjected to flame retardancy, steel wool abrasion resistance, stain resistance test, surface hardness, artificial sweat test.
Comparative example 2
Preparing a first fiber reinforced resin prepreg, wherein the first fiber reinforced resin prepreg comprises first fiber cloth and first semi-cured resin wrapping the first fiber cloth, the first fiber cloth is glass fiber cloth, and the first semi-cured resin is semi-cured epoxy resin;
sequentially overlapping four layers of the first fiber reinforced resin prepreg to form an overlapped prepreg;
hot press forming the superimposed prepreg sheet to cure the first semi-cured resin to form a first resin, and curing the first fiber-reinforced resin prepreg sheet to form a first fiber-reinforced resin layer;
and respectively forming a hardened layer and a cover bottom layer on the surfaces of two sides of the sheet after hot press molding to obtain the shell.
The case of comparative example 2 was observed for surface texture, and the case of comparative example 2 was subjected to flame retardancy, steel wool abrasion resistance, stain resistance test, surface hardness, artificial sweat test.
For comparison, the first resin, the second resin and the resin components mentioned in examples 1 and 2 and comparative examples 1 and 2 are the same, the material and the thickness of the first fiber-reinforced resin layer in examples 1 and 2 and comparative example 2 are the same, the material and the thickness of the second fiber-reinforced resin layer in examples 1 and 2 are the same, and the material and the thickness of the fiber cloth of the second fiber-reinforced resin layer in examples 1 and 2 and the fiber cloth of counter example 1 are the same; and the like; that is, the parameters of the above examples and comparative examples were selected on a comparable basis.
The surface texture condition and the results of the flame retardance, the abrasion resistance, the dirt resistance, the surface hardness and the artificial sweat test are shown in the following table:
TABLE 1
The flame retardant rating (HB) was tested as follows: 1) adjusting the height of the flame to be 20 +/-1 mm, and adopting horizontal combustion; 2) according to a standard sample strip (127 +/-5 mm multiplied by 13 +/-1 mm long strip) for sending and measuring or cutting a shell into 127 +/-5 mm multiplied by 13 +/-1 mm long strips, taking 3 strips, and marking the positions 25mm and 100mm away from one end of a sample respectively; 3) horizontally fixing the strip, wherein the direction of the transverse shaft and the horizontal direction form an angle of 45 degrees; 4) the flame was removed 30s after the test flame was applied, or the flame was removed by burning to 25mm, the time and length of damage to the specimen from 25mm to 100mm or extinction was recorded, and the burning rate was calculated. The criterion is one of 1) no significant combustion should occur after leaving the ignition source; 2) if the sample continues to burn after leaving the ignition source, the flame front should not pass through the 100mm sign line; 3) if the flame front passes the 100mm sign line, the burn rate should not exceed 75 mm/min.
The test method for the flame retardant rating (V1) was: 1) according to the standard sample strip (127 + -5 mm multiplied by 13 + -1 mm long strip) for measuring or cutting the shell into 127 + -5 mm multiplied by 13 + -1 mm long strips, taking 5 strips; 2) fixing the sample strip at a position 6.5mm away from the upper end of the sample strip, keeping the longitudinal axis vertical, enabling a blast burner to be right below the sample strip, and enabling a nozzle to be 10 +/-1 mm away from the lower end of the sample strip; 3) placing absorbent cotton with the thickness less than or equal to 6mm and the area of 50mm multiplied by 50mm at the position 300 +/-10 mm away from the lower end of the sample strip; 4) adjusting the height of the flame to be 20 +/-1 mm, and adopting vertical combustion; 5) after the flame contacted bar 10s, the flame was rapidly removed (at least 155mm away from the bar) and the time t1 to extinguish the bar was recorded; 6) after again contacting the specimen with the flame for 10s, the flame is rapidly removed (at least 155mm) and the recording of the time t2 from the burning of the specimen to extinction begins; 7) repeating the steps 2) -6) to measure 4 other splines. The standard is that 1) after the sample strip is ignited and combusted, the combustion time t1 and t2 are both less than 30 s; 2) a group of 5 splines, and after 10 times of combustion, the total combustion time is less than 250 s; 3) combustion has not yet proceeded to the support position; 4) burning the falling objects without igniting the absorbent cotton; 5) after the second time of flame contact, the flash time of the flame is below 60 s; 6) non-combustible or flash of light continues to the fixture; 7)5 splines are 1 group, and if 1 spline is unqualified, 5 splines are selected for retesting; the group 2 splines must all pass.
The steel wool wear-resistance test method comprises the following steps: 1) rubbing the surface of the shell with 20mm steel wool with the length of 30-40mm, wherein the steel wool is # 0000; 2) pressure 1000g, test frequency: 35-50 times/min; 3) number of rubs 2500; the judgment standard is that whether the surface of the shell has obvious abnormalities such as scratches, abrasion and the like is observed and observed after the test.
The test method of the surface hardness comprises the following steps: 1) 3 lines 1.0. + -. 0.2cm long are drawn on the surface of the case from different directions at an angle of 45 degrees with Mitsubishi pencil (UNI series, HB, 1H, …, 5H) and a load of 1000 gf. The judgment standard is as follows: after the pencil mark is wiped off by an eraser, the scratch is allowed, and the scratch on the surface is not allowed.
The dirt resistance test method comprises the following steps: 1) marking a 3cm straight line on a test board by using a ZEBRA oiliness pen, and standing at room temperature for 5 min; 2) wetting the dust-free cloth with water, cleaning, and wiping the wire for 200 times with a force of not less than 3 kilograms; 3) if the stains can not be cleaned by water, wetting the dust-free cloth by using ethanol and then cleaning, and wiping the wire for 200 times by using a force of not less than 3 kilograms; 4) the surface condition was visually inspected. The judgment standard is as follows: 1) after the surface is cleaned by water, no obvious stain residue exists on the surface or the surface is consistent with the limit board; 2) if the surface is not cleaned with ethanol, the degree of contamination is very severely unacceptable.
The artificial sweat resistance test method comprises the following steps: 1) preparing solution according to the manual sweat preparation instruction book, wherein the PH value is 4.6 +/-0.1; 2) the dust-free cloth of the soaking solution is attached to the surface of the shell and sealed by a sealing rubber bag, and then the shell is stored in a constant temperature and humidity box for 48h (temperature: 55. + -.1 ℃ humidity: 93 ± 2% RH); 3) and wiping the solution on the surface of the product, standing for 2h, observing and carrying out an adhesion test. The judgment standard is as follows: 1) the appearance is not abnormal, and the coating layer and the printing layer are not peeled off; 2) the adhesive force reaches 4B; 3) the surface contact angle is more than or equal to 90 degrees; 4) poor delamination between the individual laminate structures cannot occur: for example, the glass fiber and the ink layer are not layered.
Comparing the surface textures of examples 1 and 2 and comparative examples 1 and 2, it can be seen that the textile textures of examples 1 and 2 are clear, the surfaces of the textile textures are transparent, and the appearance of the textile textures is the best; as can be seen from comparison of examples 1 and 2 and comparative example 1, the flame retardant property of the housing can be greatly improved by using the resin layer containing the glass fiber cloth instead of the base material layer as the strength support of the housing; as can be seen from comparative examples 2 and 1, the resin layer of the organic fiber cloth can significantly improve the surface hardness, the wear resistance, the anti-smudging performance and the hand sweat resistance of the shell, and the hardened layer can further improve and meet the standards of the surface hardness, the wear resistance, the anti-smudging performance and the hand sweat resistance of the shell.
Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.
Claims (13)
1. A housing, comprising:
the first fiber reinforced resin layer comprises first fiber cloth and first resin wrapping the first fiber cloth, wherein the first fiber cloth is inorganic fiber cloth; and
a second fiber-reinforced resin layer bonded to one side surface of the first fiber-reinforced resin layer; the second fiber reinforced resin layer comprises second fiber cloth and second resin wrapping the second fiber cloth, wherein the second fiber cloth is organic fiber cloth, and the second resin is light-transmitting resin.
2. The housing according to claim 1, wherein the second fiber cloth is woven or knitted fabric formed of artificial organic fiber, natural organic fiber, or a mixture thereof.
3. The housing of claim 1, wherein the first fiber cloth is a glass fiber cloth.
4. The housing according to claim 1, wherein the number of the first fiber-reinforced resin layers is 3 or more; the weaving direction of the first fiber cloth of the first fiber reinforced resin layer comprises a radial direction and a weft direction; each layer of the first fiber reinforced resin layer is arranged in a stacking mode, and the first fiber cloth of the first fiber reinforced resin layer of each adjacent layer is arranged in a radial direction and a weft direction in a staggered mode.
5. The housing of claim 4, wherein the first fiber cloth has a thickness of approximately 0.1 millimeters; the number of the first fiber reinforced resin layers is 3, 4 or 5.
6. The housing according to claim 1, wherein the first resin and the second resin are the same material; the first resin and the second resin are fused at a bonding portion of the first fiber-reinforced resin layer and the second fiber-reinforced resin layer.
7. The housing according to claim 1, further comprising a hardened layer formed on a surface of the second fiber-reinforced resin layer on a side remote from the first fiber-reinforced resin layer; the hardened layer is made of a light-transmitting material; the surface hardness of the hardened layer is 3H to 5H.
8. The housing according to claim 1, further comprising a cover bottom layer formed on a surface of the first fiber-reinforced resin layer on a side away from the second fiber-reinforced resin layer; the dyne value of the cap floor layer is greater than 32.
9. The housing according to any one of claims 1 to 8, wherein the housing comprises a bottom plate and a side plate connected substantially perpendicularly to the bottom plate, which are integrally provided; the bottom plate and the side plates surround to form an accommodating cavity, and the accommodating cavity is used for accommodating components; the first fiber reinforced resin layer is closer to the inner wall of the accommodating cavity than the second fiber reinforced resin layer.
10. A method of making a housing, comprising:
preparing a first fiber reinforced resin prepreg, wherein the first fiber reinforced resin prepreg comprises first fiber cloth and first semi-cured resin wrapping the first fiber cloth, and the first fiber cloth is inorganic fiber cloth;
preparing a second fiber reinforced resin prepreg, wherein the second fiber reinforced resin prepreg comprises a second fiber cloth and second semi-curing resin wrapping the second fiber cloth, and the second fiber cloth is organic fiber cloth;
superposing the first fiber reinforced resin prepreg sheet and the second fiber reinforced resin prepreg sheet to form a superposed prepreg sheet; and
hot-press molding the superposed prepreg to cure the first semi-cured resin to form a first resin, cure the first fiber-reinforced resin prepreg to form a first fiber-reinforced resin layer, cure the second semi-cured resin to form a second resin, and cure the second fiber-reinforced resin prepreg to form a second fiber-reinforced resin layer, thereby obtaining the housing; wherein the second resin is a light-transmitting resin.
11. The method of manufacturing a case according to claim 10, wherein the second fiber cloth is woven or knitted fabric formed of artificial organic fiber, natural organic fiber, or a mixture thereof.
12. The method of manufacturing a housing according to claim 10, wherein after the thermo-compression molding of the laminated prepreg, the method of manufacturing a housing further comprises:
forming a hardened layer on the surface of one side, far away from the first fiber reinforced resin layer, of the second fiber reinforced resin layer; the hardened layer is made of a light-transmitting material; the surface hardness of the hardened layer is 3H to 5H; and
forming a cover bottom layer on the surface of one side, away from the second fiber reinforced resin layer, of the first fiber reinforced resin layer; the dyne value of the cap floor layer is greater than 32.
13. An electronic device characterized in that it comprises a casing according to any one of claims 1 to 9; the electronic device includes an outer surface provided on the housing, wherein the second fiber-reinforced resin layer is closer to the outer surface than the first fiber-reinforced resin layer.
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| CN202010865991.5A CN114083840A (en) | 2020-08-25 | 2020-08-25 | Shell, preparation method thereof and electronic equipment |
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| CN202010865991.5A CN114083840A (en) | 2020-08-25 | 2020-08-25 | Shell, preparation method thereof and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662899A (en) * | 2008-08-25 | 2010-03-03 | 比亚迪股份有限公司 | Electronic product outer shell and manufacturing method thereof |
| CN103696123A (en) * | 2013-12-24 | 2014-04-02 | 宜兴市中碳科技有限公司 | Composite material of mixed and knitted chemical fibers and natural veneers and preparation method of composite material |
| CN104626669A (en) * | 2015-01-13 | 2015-05-20 | 上海杉华复合材料科技有限公司 | Carbon fiber enhanced composite material panel and preparation method thereof |
| CN108215377A (en) * | 2016-12-14 | 2018-06-29 | 波音公司 | Include the laminar structure of fiber reinforced thermolplastic prepreg overlay |
| CN109981847A (en) * | 2019-03-26 | 2019-07-05 | Oppo广东移动通信有限公司 | Electronic equipment, glass cover-plate and its manufacturing method |
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2020
- 2020-08-25 CN CN202010865991.5A patent/CN114083840A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662899A (en) * | 2008-08-25 | 2010-03-03 | 比亚迪股份有限公司 | Electronic product outer shell and manufacturing method thereof |
| CN103696123A (en) * | 2013-12-24 | 2014-04-02 | 宜兴市中碳科技有限公司 | Composite material of mixed and knitted chemical fibers and natural veneers and preparation method of composite material |
| CN104626669A (en) * | 2015-01-13 | 2015-05-20 | 上海杉华复合材料科技有限公司 | Carbon fiber enhanced composite material panel and preparation method thereof |
| CN108215377A (en) * | 2016-12-14 | 2018-06-29 | 波音公司 | Include the laminar structure of fiber reinforced thermolplastic prepreg overlay |
| CN109981847A (en) * | 2019-03-26 | 2019-07-05 | Oppo广东移动通信有限公司 | Electronic equipment, glass cover-plate and its manufacturing method |
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