CN108928073A - Composite board and preparation method thereof, shell and electronic equipment - Google Patents
Composite board and preparation method thereof, shell and electronic equipment Download PDFInfo
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- CN108928073A CN108928073A CN201810539045.4A CN201810539045A CN108928073A CN 108928073 A CN108928073 A CN 108928073A CN 201810539045 A CN201810539045 A CN 201810539045A CN 108928073 A CN108928073 A CN 108928073A
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- 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
- 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
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/584—Scratch resistance
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Abstract
The present invention provides composite board and preparation method thereof, shell and electronic equipments.Wherein, composite board includes：Strength layer；Hard layer, the hard layer are arranged on the first surface of the strength layer；Fire-retardant strengthening layer, the fire-retardant strengthening layer are arranged on surface of the hard layer far from the strength layer.Inventors have found that the plywood sheet structure is simple, is easily achieved, under the mating reaction of above-mentioned three-decker, so that the composite board hardness is higher, damage resistant, high temperature resistant, flame retardant property is preferable, and service performance is preferable.
Description
Technical field
The present invention relates to field of material technology, set specifically, being related to composite board and preparation method thereof, shell and electronics
It is standby.
Background technique
Composite board used in such as mobile phone shell of casting of electronic device currently on the market, the typically up to resistance less than V1 grade
Fire performance.Have an anti-flammability in order to make above-mentioned shell, usually adulterates fire retardant in the material for forming shell, but on
The shell hardness for stating method acquisition is lower, and adhesion strength is poor, and current electronic equipment is to using fast charge technology, it is necessary to
Guarantee that the shell of the electronic equipment can reach the flame retardant property of V1 grade.But casting of electronic device is difficult to reach at present
Requirement is stated, is not able to satisfy the consumption experience of consumer.
Thus, the shell of current electronic equipment still has much room for improvement.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose that a kind of hardness is higher, flame retardant property is preferable or the preferable composite board of adhesion strength, utilizes this
The shell that composite board is prepared has preferable high temperature resistance and perhaps flame retardant property or has higher hardness.
In one aspect of the invention, the present invention provides a kind of composite boards.According to an embodiment of the invention, this is compound
Plate includes：Strength layer；Hard layer, the hard layer are arranged on the first surface of the strength layer；Fire-retardant strengthening layer, it is described
Fire-retardant strengthening layer is arranged on surface of the hard layer far from the strength layer.Inventors have found that the plywood sheet structure is simple
List is easily achieved, under the mating reaction of above-mentioned three-decker, so that the composite board hardness is higher, and damage resistant, high temperature resistant,
Flame retardant property is preferable, and service performance is preferable.
According to an embodiment of the invention, forming chemical bonding between the fire-retardant strengthening layer and the hard layer.Inventor
It has surprisingly found that, fire-retardant strengthening layer firmly pastes compared with the chemical bonding between hard layer can allow fire-retardant strengthening layer
It is attached to the surface of hard layer, and the hardness of fire-retardant strengthening layer can be significantly improved, and then further increases the hardness of composite board
And adhesion strength.
According to an embodiment of the invention, the material for forming the strength layer includes PC.The toughness of strength layer is preferable as a result,
Impact strength is higher, so that the composite board finally obtained is not easy to be broken.
According to an embodiment of the invention, the material for forming the hard layer includes at least one of PC or PMMA.As a result,
The hardness of hard layer is higher, and scratch resistant performance is preferable.
According to an embodiment of the invention, the material for forming the fire-retardant strengthening layer includes cross-linking compounds, the Cross-linked
Closing object is to be reacted by acrylic resin with organic siliconresin.The consistency of fire-retardant strengthening layer is higher as a result, surface compared with
To be smooth, adhesion strength is preferable, and acrylic resin has preferable hardness, and the hardness that fire-retardant strengthening layer can be improved is organic
Silicone resin can crack carbon-coating when temperature is higher and improve the inoxidizability of carbon-coating, so achieve the effect that it is fire-retardant so that multiple
Plywood material service performance is preferable.
According to an embodiment of the invention, the material for forming the fire-retardant strengthening layer further includes：Silica and flame retardant
At least one of.Thus, it is possible to further increase the flame retardant property or high temperature resistance of fire-retardant strengthening layer, and titanium dioxide
Silicon hardness is larger, and hardness and resistance to marring that silica helps to improve fire-retardant strengthening layer are added in fire-retardant strengthening layer
Can, and then further increase the hardness and adhesion strength of composite board.
According to an embodiment of the invention, the strength layer with a thickness of 0.4-0.6mm.The thickness of strength layer is upper as a result,
Intensity is stated in range more preferably, so that the composite board finally obtained is not easy by tumble injury.
According to an embodiment of the invention, the hard layer with a thickness of 0.1-0.2mm.As a result, the hardness of hard layer more preferably,
So that the composite board finally obtained has preferable hardness, it is not easy to be scratched.
According to an embodiment of the invention, the fire-retardant strengthening layer with a thickness of 0.01-0.08mm.Fire-retardant strengthening layer as a result,
Hardness more preferably so that the composite board finally obtained has more preferably hardness, be not easy to be broken, scratch, and flame retardant effect compared with
It is good.
In another aspect of this invention, the present invention provides a kind of shells.According to an embodiment of the invention, the shell includes
Mentioned-above composite board.Inventors have found that the shell has all feature and advantage of mentioned-above composite board,
This is no longer excessively repeated.
In another aspect of this invention, the present invention provides a kind of electronic equipment.According to an embodiment of the invention, the electronics
Equipment includes mentioned-above shell.Inventors have found that the shell hardness of the electronic equipment is higher, surface is relatively smooth, scratch-resistant
Wound, flame retardant property is preferable, can satisfy the consumption experience of consumer.
In another aspect of this invention, the present invention provides a kind of methods for preparing mentioned-above composite board.According to
The embodiment of the present invention, this method include：Hard layer is formed on the first surface of strength layer；In the hard layer far from described
Fire-retardant forced fluid is coated on the surface of strength layer and makes the fire-retardant forced fluid solidification, forms fire-retardant strengthening layer.Inventors have found that
This method is simple, convenient, it is easy to accomplish, and can be prepared higher hardness, damage resistant, high temperature resistant, flame retardant property compared with
Good composite board.
According to an embodiment of the invention, the fire-retardant forced fluid includes：Resin, the resin include acrylic resin and have
Machine silicone resin；And solvent, the solvent are selected from hydroxyl ketone, acylphosphine oxide, isopropanol, in propylene glycol monomethyl ether at least
One of.The fire-retardant forced fluid is easy to be cured as a result, and the resin in fire-retardant forced fluid, which can effectively play, improves fire-retardant strengthening layer
Hardness and flame retardant property effect, and it is dispersion effect of the resin dispersion in above-mentioned solvent is preferable.
According to an embodiment of the invention, the fire-retardant forced fluid further includes silica dispersions, levelling agent and fire-retardant
At least one of auxiliary agent.Silica is added in fire-retardant forced fluid as a result, can be further improved the hard of fire-retardant strengthening layer
Degree, high temperature resistance and flame retardant property；Levelling agent can make the surface smoother for solidifying obtained fire-retardant strengthening layer, resist
Scratching effect is preferable；The addition of flame retardant can make the flame retardant effect of fire-retardant strengthening layer more preferably.
According to an embodiment of the invention, the fire-retardant forced fluid includes：The acrylic resin 25-55 parts by weight, it is described
Organic siliconresin 0.3-0.5 parts by weight, the hydroxyl ketone 24-44 parts by weight, the acylphosphine oxide 6-16 parts by weight, institute
State isopropanol 0.4-0.6 parts by weight, the propylene glycol monomethyl ether 1.6-1.8 parts by weight, the silica dispersions 11.3-25.3
Parts by weight, the levelling agent 0.3-0.5 parts by weight, the flame retardant 4-9 parts by weight.Each component content is in above-mentioned model as a result,
The preferably fire-retardant strengthening layer of hardness, smoothness and flame retardant property can be obtained by enclosing, and then can significantly improve composite board
Hardness, adhesion strength and flame retardant property.
According to an embodiment of the invention, further including utilizing toluene, cyclohexanone or acetic acid before coating fire-retardant forced fluid
The step of at least one of ethyl ester dilutes the fire-retardant forced fluid, wherein the resistance after fire-retardant forced fluid/dilution before dilution
Fire forced fluid=25-35wt%.Fire-retardant forced fluid after diluting as a result, has appropriate concentration, is easy to solidify, the resistance of formation
The surface for firing strengthening layer is relatively flat, smooth, beautiful, and consistency is higher, conducive to improving the hardness of fire-retardant strengthening layer, resisting
Scratch performance and flame retardant property.
According to an embodiment of the invention, the cured mode is ultraviolet light solidification, the cured energy is 350-
410MJ/cm2.Thus, it is possible to effectively fire-retardant forced fluid be solidified to form the preferably fire-retardant strengthening layer of service performance, and solid
Changing energy, solidification effect is preferable within the above range, and the surface for the fire-retardant strengthening layer being formed by curing is relatively flat, smooth and more
It is fine and close.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the composite board in one embodiment of the invention.
Fig. 2 is the method flow schematic diagram that composite board is prepared in one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail.The embodiments described below is exemplary, and is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to text in the art
It offers described technology or conditions or is carried out according to product description.Reagents or instruments used without specified manufacturer,
For can be with conventional products that are commercially available.
The present invention is following understanding based on inventor and discovery and completes：
Currently, the material that the shell of electronic equipment in the market uses cannot generally reach the flame retardant effect of V1 grade, and
Hardness cannot be guaranteed, so that the shell of electronic equipment not damage resistant.In view of the above technical problems, inventor has carried out deep
Research, finds after research, can be formed on the surface for the strength layer for having preferable intensity and have the hard layer of preferable hardness, then
Hard layer is formed far from the surface of strength layer has fire-retardant strengthening layer compared with strong hardness and flame retardant property, between three-decker mutually
Cooperation can obtain that intensity, hardness is higher, the preferable composite board of flame retardant property, to meet the high rigidity of shell, anti-simultaneously
Scuffing and fire-retardant demand, meet the consumption experience of consumer.
In view of this, in one aspect of the invention, the present invention provides a kind of composite boards.Implementation according to the present invention
Example, referring to Fig.1, which includes：Strength layer 100；Hard layer 200, the hard layer 200 are arranged in the strength layer
On 100 first surface；Fire-retardant strengthening layer 300, the fire-retardant setting of strengthening layer 300 is in the hard layer 200 far from described strong
It spends on the surface of layer 100.Inventors have found that the plywood sheet structure is simple, is easily achieved, in above-mentioned three-decker with cooperation
Under, so that the composite board hardness, intensity are higher, damage resistant, shock resistance, flame retardant property is preferable, and service performance is preferable.
It should be noted that first surface refers to the surface close to user when in use.
According to an embodiment of the invention, the material for forming the strength layer includes PC.The toughness of strength layer is preferable as a result,
Impact strength is higher, so that the composite board finally obtained is not easy to be broken.In some embodiments of the invention, shape
It is fire retardation PC at the material of strength layer, the intensity of strength layer is preferable as a result, and flame retardant property is preferable, improves composite board anti-flammability
The better effect of energy.In some currently preferred embodiments of the present invention, the material for forming strength layer is the fire retardation PC of V0 grade, by
This, strength layer is also equipped with preferable flame retardant effect when having preferable intensity.
It should be noted that flame retardant rating is that V0 grade refers to after carrying out 10 seconds combustion testings twice to sample, fire
Flame extinguishes in 30 seconds, cannot have comburant to fall down.
According to an embodiment of the invention, in order to enable strength layer has preferable intensity (such as impact strength etc.), institute
State strength layer with a thickness of 0.4-0.6mm.As a result, the thickness of strength layer within the above range intensity more preferably so that final obtain
Composite board be not easy by tumble injury.When the thickness of strength layer is excessively thin, then the intensity of strength layer is compared to a thickness of 0.4-0.6mm
When it is poor so that the intensity of composite board is relatively poor；When the thickness of strength layer is blocked up, then in order to control composite board
Size be unlikely to conference accordingly and reduce the thickness of hard layer so that the hardness and wearability of composite board are relatively
Difference.
According to an embodiment of the invention, the material for forming the hard layer includes PC (polycarbonate) or PMMA (poly- first
At least one of base methyl acrylate).The hardness of hard layer is higher as a result, and scratch resistant performance is preferable.In some tools of the invention
In body embodiment, formed hard layer material be high rigidity PC, as a result, the hardness of hard layer more preferably so that composite board
Hardness more preferably, adhesion strength is more preferably.According to an embodiment of the invention, the hard layer with a thickness of 0.1-0.2mm.By
This, the hardness of hard layer more preferably, so that the composite board finally obtained has preferable hardness, is not easy to be scratched.Work as hard layer
Thickness it is excessively thin when, then the hardness of hard layer compared with hard layer with a thickness of the 0.1-0.2mm time difference so that composite board is hard
Degree and wearability are relatively poor；Then it was unlikely to conference phase when the thickness of hard layer is blocked up in order to control the size of composite board
The thickness of strength layer should be reduced, so that the hardness and wearability of composite board are relatively poor.
According to an embodiment of the invention, being formed described fire-retardant to further increase the hardness of composite board and anti-flammability
The material of strengthening layer includes cross-linking compounds, and the cross-linking compounds are to react to obtain with organic siliconresin by acrylic resin
's.The consistency of fire-retardant strengthening layer is higher as a result, and surface is relatively smooth, and adhesion strength is preferable, and acrylic resin have compared with
Hardness, the adhesion strength of fire-retardant strengthening layer can be improved in good hardness；Organic siliconresin can crack carbon when temperature is higher
Layer and the inoxidizability for improving carbon-coating, flame retardant property is preferable, and service performance is preferable.According to an embodiment of the invention, acrylic acid tree
Contain-C-OH functional group in rouge, contain-Si-OH functional group in organic siliconresin, the two reaction in acrylic resin and can have
Si-O-Si chemical bonding is formed between machine silicone resin, forms the cross-linking compounds for having tridimensional network, and then can be improved
Compactness, hardness and the high temperature resistance of fire-retardant strengthening layer further increase the flame retardant property of fire-retardant strengthening layer and anti-zoned
Hurt performance.
In some embodiments of the invention, the material of the formation fire-retardant strengthening layer further includes：Silica and
At least one of flame retardant, and silica or flame retardant are uniformly dispersed in above-mentioned cross-linking compounds.As a result,
It can be further improved the flame retardant property or high temperature resistance of fire-retardant strengthening layer, and silica hardness is larger, fire-retardant
Silica is added in strengthening layer and helps to improve the hardness and adhesion strength of fire-retardant strengthening layer, and then further increases multiple
The hardness and adhesion strength of plywood material.
According to an embodiment of the invention, the fire-retardant strengthening layer with a thickness of 0.01-0.08mm.Fire-retardant strengthening layer as a result,
Anti-flammability or hardness more preferably so that the composite board finally obtained has more preferably hardness and anti-flammability, be not easy to be broken,
It scratches or burns out.When the thickness of fire-retardant strengthening layer is excessively thin, then the more fire-retardant reinforcing of hardness and anti-flammability of fire-retardant strengthening layer
Layer with a thickness of 0.01-0.08mm when it is relatively poor so that the hardness and anti-flammability of composite board are relatively poor；Work as resistance
When the thickness of combustion strengthening layer is blocked up, then product embrittlement, toughness relative reduction lead to the impact strength of composite board relatively
It is low.
According to an embodiment of the invention, forming chemical bonding, as a result, fire-retardant reinforcing between fire-retardant strengthening layer and hard layer
The consistency of layer is higher, and flame retardant effect is preferable, and can more firmly be adhered to hard layer surface, can effectively improve fire-retardant
The hardness and adhesion strength of strengthening layer.In some embodiments of the invention, when the material for forming hard layer is PC
Or PMMA, it is organic in fire-retardant strengthening layer when the material for forming fire-retardant strengthening layer includes acrylic resin and organic siliconresin
The chemical bond that hydroxyl in the acryloyl group and hard layer of silicone resin is formed is hydroxyl/acryloyl group chemistry key, which can
To effectively improve the interaction force between fire-retardant strengthening layer and hard layer.
It should be noted that when the material for forming strength layer includes PC, since PC has preferable toughness, so that fire-retardant
Strengthening layer can also have preferable impact resistance or higher impact strength, so that composite board is not easy by tumble injury, into
And the consumption experience of consumer can be improved.
According to an embodiment of the invention, hard in the mutually matched above-mentioned strength layer of above-mentioned intensity and hardness, hard layer
The surface of matter layer, which forms one layer, has higher hardness and the fire-retardant strengthening layer compared with high flame retardant, and the fire-retardant strengthening layer and hard layer
Between can form chemical bonding, the consistency and hardness of fire-retardant strengthening layer can be significantly improved, cooperating between three can
To significantly improve the hardness and anti-flammability of composite board, so that the composite board compares impact resistance, damage resistant, it is not easy to be fallen
It is bad, and flame retardant property is preferable.
In another aspect of this invention, the present invention provides a kind of shells.According to an embodiment of the invention, the shell includes
Mentioned-above composite board.Inventors have found that the shell has all feature and advantage of mentioned-above composite board,
This is no longer excessively repeated.
It should be noted that the surface that shell is contacted with user is surface of the fire-retardant strengthening layer far from strength layer.
According to an embodiment of the invention, the shape of shell is not particularly limited, as long as can satisfy requirement, art technology
Personnel can flexible choice according to actual needs.Such as shell can be slab construction, or the structure of 2.5 dimensions may be used also
Think three-dimensional structure, the appearance looks elegant of shell is good-looking as a result, can satisfy the consumption demand of consumer.
In another aspect of this invention, the present invention provides a kind of electronic equipment.According to an embodiment of the invention, the electronics
Equipment includes mentioned-above shell.Inventors have found that the shell hardness of the electronic equipment is higher, surface is relatively smooth, scratch-resistant
Wound, flame retardant property is preferable, and especially suitable fast charge technology can satisfy the consumption experience of consumer.
According to an embodiment of the invention, the type of electronic equipment is not particularly limited, as long as can satisfy requirement, this field
Technical staff can flexible choice according to actual needs, for example, to can include but is not limited to hand mechanical, electrical for the type of electronic equipment
Depending on, computer etc.；Electronic equipment can also include the knot that conventional electronic device should have in addition to including mentioned-above shell
Structure, such as display panel, CPU, electrode wires etc., no longer excessively repeat herein.According to an embodiment of the invention, the shape of shell does not have
There is special limitation, as long as can satisfy requirement, those skilled in the art can carry out flexible according to the type of practical electronic equipment
Selection shell shape, no longer excessively repeat herein.
In another aspect of this invention, the present invention provides a kind of methods for preparing mentioned-above composite board.According to
The embodiment of the present invention, referring to Fig. 2, this method includes：
S100：Hard layer is formed on the first surface of strength layer.
According to an embodiment of the invention, first surface, strength layer, hard layer are consistent with the description of front, herein not after
It repeats more.
According to an embodiment of the invention, the mode for forming hard layer is not particularly limited, as long as can satisfy requirement, ability
Field technique personnel can flexible choice according to actual needs.Such as forming the mode of hard layer can be deposition；Or can be
A flood hard layer is formed first with injection molding manner, is pasted onto the surface etc. of strength layer later.
According to an embodiment of the invention, fire-retardant strengthening layer is fire-retardant by coating on surface of the hard layer far from strength layer
Forced fluid simultaneously solidifies fire-retardant forced fluid, in order to enable resin dispersion is more uniform, and obtained fire-retardant forced fluid
More easily solidify to form fire-retardant strengthening layer, before coating fire-retardant forced fluid, including：
S200：Using at least one of toluene, cyclohexanone or ethyl acetate by the fire-retardant diluted step of forced fluid
Suddenly.
According to an embodiment of the invention, fire-retardant forced fluid includes：Resin, the resin include acrylic resin and organosilicon
Resin；And solvent, the solvent are selected from hydroxyl ketone, acylphosphine oxide, isopropanol, in propylene glycol monomethyl ether at least it
One.The fire-retardant forced fluid is easy to be cured as a result, and the resin in fire-retardant forced fluid, which can effectively play, improves fire-retardant strengthening layer
The effect of hardness and flame retardant property, and dispersion effect of the resin dispersion in above-mentioned solvent is preferable.Reality according to the present invention
Example is applied, in order to further enhance the hardness and flame retardant effect of fire-retardant strengthening layer, fire-retardant forced fluid can also include silica
At least one of dispersion liquid, levelling agent and flame retardant.Silica has preferable hardness as a result, in fire-retardant reinforcing
Silica is put into liquid can be further improved the hardness of fire-retardant strengthening layer, and silica is not combustion-supporting, in fire-retardant strengthening layer
The middle flame retardant property or high temperature resistance that silica is added and helps to improve fire-retardant strengthening layer；Levelling agent can to solidify
The surface smoother of obtained fire-retardant strengthening layer, scratch resistance effect are preferable；The addition of flame retardant can make fire-retardant strengthening layer
Flame retardant effect more preferably.According to an embodiment of the invention, levelling agent includes diacetone alcohol etc., add in fire-retardant forced fluid as a result,
Enter above-mentioned levelling agent can be further improved solidify after the smoothness of fire-retardant strengthening layer that obtains, significantly improve its resistance to marring
Energy.According to an embodiment of the invention, flame retardant includes at least one of tricresyl phosphate second rouge, ammonium dihydrogen phosphate, antimony trichloride,
Thus, it is possible to further increase the flame retardant property of fire-retardant strengthening layer.
According to an embodiment of the invention, in order to enable the hardness or flame retardant property of fire-retardant strengthening layer are preferable, it is described fire-retardant
Forced fluid includes：The acrylic resin 25-55 parts by weight, the organic siliconresin 0.3-0.5 parts by weight, the hydroxyl ketone
24-44 parts by weight, the acylphosphine oxide 6-16 parts by weight, the isopropanol 0.4-0.6 parts by weight, the propylene glycol monomethyl ether
1.6-1.8 parts by weight, the silica dispersions 11.3-25.3 parts by weight, the levelling agent 0.3-0.5 parts by weight are described
Flame retardant 4-9 parts by weight.The content of each component can obtain hardness or flame retardant property in above range and preferably hinder as a result,
Strengthening layer is fired, and then the hardness or flame retardant property of entire composite board can be improved.When the content of acrylic resin is too low,
The hardness of fire-retardant strengthening layer is relatively low in 25-55 parts by weight compared to its content, when the too high levels of acrylic resin,
It then cannot more be uniformly dispersed in solvent, so that the uneven thickness one of fire-retardant strengthening layer, influences its hardness, service performance phase
To poor；When the content of organic siliconresin is too low, then the hardness and anti-flammability of the fire-retardant strengthening layer formed by fire-retardant forced fluid
It can be relatively low in 0.3-0.5 parts by weight compared with organic siliconresin content；When organic siliconresin too high levels, then resistance can be destroyed
The compactness for firing strengthening layer, so that its hardness is relatively low；When the too high levels of levelling agent, then it can make fire-retardant strengthening layer
Compactness is relatively low, influences the hardness of fire-retardant strengthening layer, when the content of levelling agent is too low, then the surface light of fire-retardant strengthening layer
Slippery is relatively poor, and adhesion strength is relatively poor；When the too high levels of flame retardant, then it can make the cause of fire-retardant strengthening layer
Close property is relatively low, influences the hardness of fire-retardant strengthening layer, when the content of flame retardant is too low, then the fire-retardant effect of fire-retardant strengthening layer
Fruit is poor in 4-9 parts by weight compared to the content of flame retardant.In short, each component in fire-retardant forced fluid is in above-mentioned content model
It encloses and interior cooperates that the effect that reaches is more excellent, and hardness, adhesion strength and the flame retardant property of the fire-retardant strengthening layer of acquisition are more preferably.
In some embodiments of the invention, the fire-retardant forced fluid includes：The acrylic resin 25-55 parts by weight, it is described
Organic siliconresin 0.3-0.5 parts by weight, the hydroxyl ketone 24-44 parts by weight, the acylphosphine oxide 6-16 parts by weight, institute
State isopropanol 0.4-0.6 parts by weight, the propylene glycol monomethyl ether 1.6-1.8 parts by weight, the silica dispersions 11.3-25.3
Parts by weight, diacetone alcohol 0.3-0.5 parts by weight, triethyl phosphate 2-4 parts by weight, ammonium dihydrogen phosphate 0.5-1.2 parts by weight, dioxy
Change antimony 2.3-6 parts by weight.The fire-retardant strengthening layer hardness that fire-retardant forced fluid obtains after solidifying as a result, more preferably, adhesion strength and
Flame retardant property is more preferably.
According to an embodiment of the invention, can satisfy the following conditions when diluting fire-retardant forced fluid：It is fire-retardant before dilution
Fire-retardant forced fluid=25-35wt% after forced fluid/dilution.Fire-retardant forced fluid after diluting as a result, has appropriate concentration,
It is easy to solidify, the surface of the fire-retardant strengthening layer of formation is relatively flat, smooth, and it is beautiful, and consistency is higher, is easy to improve resistance
Fire hardness, adhesion strength and the flame retardant property of strengthening layer.When fire-retardant forced fluid be diluted it is excessively dilute when, solidification when due to molten
The uneven surface of the too fast fire-retardant strengthening layer for obtain of agent volatilization, and fire-retardant strengthening layer consistency is relatively low；Work as resistance
For combustion forced fluid when not being substantially diluted, the fire-retardant forced fluid after dilution is relatively sticky, be unfavorable for being formed it is relatively flat or
The uniform fire-retardant strengthening layer of thickness.
S300：The fire-retardant forced fluid after diluting is coated on surface of the hard layer far from strength layer and is solidified, and is formed fire-retardant
Strengthening layer.
According to an embodiment of the invention, fire-retardant strengthening layer is consistent with the description of front, no longer excessively repeat herein.
According to an embodiment of the invention, the mode of the curing process is ultraviolet light solidification, the cured energy is
350-410MJ/cm2.Thus, it is possible to effectively solidify fire-retardant forced fluid to form the preferably fire-retardant strengthening layer of service performance,
And solidification effect is preferable within the above range for solidification energy, the surface for the fire-retardant strengthening layer being formed by curing is relatively flat, it is smooth and
It is comparatively dense.When cured energy is excessively high, the too fast fire-retardant reinforcing layer surface resulted in of solvent evaporation forms pit-hole, causes
Close property is 350-410MJ/cm compared to cured energy2When it is relatively low, and when solidification energy is excessively high, will lead to over cure,
So that fire-retardant strengthening layer aging embrittlement, toughness is relatively poor, and impact strength is relatively low；When cured energy is too low,
Solvent volatilization is slower, and curing time is longer, and curing degree is inadequate, and hardening is not thorough, and the crosslinking degree of resin is compared to cured
Energy is 350-410MJ/cm2When it is relatively low so that the hardness or flame retardant property of fire-retardant strengthening layer are relatively low, resist
It is relatively poor to scratch performance.
According to an embodiment of the invention, the mode for coating fire-retardant forced fluid can be showering etc.；Resistance after the dilution of coating
The thickness for firing forced fluid can be 4-6 microns, can obtain mentioned-above fire-retardant reinforcing after ultraviolet light solidification as a result,
Layer.
Inventors have found that the above-mentioned method for preparing composite board is simple, convenient, it is easy to accomplish, and can be prepared into
To damage resistant, flame retardant property is preferable or the higher composite board of impact strength.
According to an embodiment of the invention, the fire-retardant of V1 grade cannot be met simultaneously in the shell of general electronic equipment
Effect and the higher and scratch resistant requirement of hardness.And in this application, it is higher by will be provided with the preferable strength layer of intensity, hardness
Hard layer and hardness and the preferably fire-retardant strengthening layer of anti-flammability be equipped with, and the shape between hard layer and fire-retardant strengthening layer
At chemical bonding, acquisition has preferable hardness, the composite board compared with high flame retardant, specifically, the hardness of the composite board is reachable
3H, compared to the prior art in adulterate the hardness (1H) of plate that fire retardant obtains in PC plate material and obtained significantly changing
It is apt to, and 2500 scratch resistances can be reached, is also significantly improved compared to the prior art, flame retardant rating can reach
To V1 grade, when which is applied to the shell of electronic equipment, so that the shell damage resistant, is not easy to break, fire-retardant effect
Fruit is preferable, and service life significantly improves, and meets the consumption experience of consumer.
Embodiments herein is described below.
Embodiment
Hardness measuring method：With --- the pencil (UNI series) that hardness is 6H, 45 degree of angles, load 500gf are in sample surfaces
The lines for marking 3 1.0 ± 0.2cm long from different directions, after wiping pencil trace with rubber, if composite board surface does not have
It scratches, then shows that composite board hardness is preferable.
Adhesion strength test method：Blue markings spring is selected, pressure is selected and is fixed, hardness test stick is vertical
Be placed on the surface of tested composite board, push and with the speed of 10mm/s on the surface of tested composite board from difference
The straight line of 3 5~10mm is drawn in direction, observes surface after being dabbed with non-dust cloth.Spring pressure is 4N and surface no marking shows again
Plywood material adhesion strength is preferable.
Flame retardant property test method：After carrying out 10 seconds combustion testings twice to sample, residual flame extinguishes in 60 seconds, and drips
The particle fallen can not light cotton.The flame retardant rating for meeting the composite board of above-mentioned requirements can reach V1 grade.
It should be noted that flame retardant rating is that V1 grade refers to and carries out twice after 10 seconds combustion testings to sample, flame
Extinguish in 60 seconds, there cannot be comburant to fall down.
It should be noted that the surface tested in above-mentioned test method refers to table of the fire-retardant strengthening layer far from strength layer
Face.
Embodiment 1
Composite board includes：
Strength layer：Forming material is PC, with a thickness of 0.4mm；
Hard layer：Forming material is PC (hardness 1H), with a thickness of 0.1mm；
Fire-retardant strengthening layer：With a thickness of 0.01mm, the fire-retardant forced fluid for forming fire-retardant strengthening layer includes 25 weight of acrylic resin
Measure part, 0.3 parts by weight of organic siliconresin, 24 parts by weight of hydroxyl ketone, 6 parts by weight of acylphosphine oxide, 0.4 weight of isopropanol
Part, 1.6 parts by weight of propylene glycol monomethyl ether, 11.3 parts by weight of silica dispersions, 0.3 parts by weight of levelling agent, 4 weight of flame retardant
Part, wherein the fire-retardant forced fluid=25wt%, solidification energy 350MJ/cm after fire-retardant forced fluid/dilution before dilution2。
Embodiment 2
Composite board includes：
Strength layer：Forming material is PC, with a thickness of 0.6mm；
Hard layer：Forming material is PMMA (hardness 2H.), with a thickness of 0.2mm；
Fire-retardant strengthening layer：With a thickness of 0.08mm, the fire-retardant forced fluid of fire-retardant strengthening layer includes 55 parts by weight of acrylic resin,
0.5 parts by weight of organic siliconresin, 44 parts by weight of hydroxyl ketone, 16 parts by weight of acylphosphine oxide, 0.6 parts by weight of isopropanol, third
1.8 parts by weight of glycol methyl ether, 25.3 parts by weight of silica dispersions, 0.5 parts by weight of levelling agent, 9 parts by weight of flame retardant,
In, the fire-retardant forced fluid=35wt%, solidification energy 410MJ/cm after fire-retardant forced fluid/dilution before dilution2。
Embodiment 3
Composite board includes：
Strength layer：Forming material is the fire retardation PC of V0 grade, with a thickness of 0.5mm；
Hard layer：Forming material is high rigidity PC (hardness 1H.), with a thickness of 0.15mm；
Fire-retardant strengthening layer：With a thickness of 0.04mm, the fire-retardant forced fluid of fire-retardant strengthening layer includes 35 parts by weight of acrylic resin,
0.4 parts by weight of organic siliconresin, 34 parts by weight of hydroxyl ketone, 10 parts by weight of acylphosphine oxide, 0.5 parts by weight of isopropanol, third
1.7 parts by weight of glycol methyl ether, 15 parts by weight of silica dispersions, 0.4 parts by weight of levelling agent, 6 parts by weight of flame retardant,
In, the fire-retardant forced fluid=30wt%, solidification energy 380MJ/cm after fire-retardant forced fluid/dilution before dilution2。
Comparative example 1
The structure of composite board is same as Example 1, the difference is that, it does not include fire-retardant strengthening layer in the present embodiment.
Comparative example 2
The structure of composite board is same as Example 1, the difference is that, it does not include hard layer in the present embodiment.
Comparative example 3
The structure of composite board is same as Example 1, the difference is that, it does not include strength layer in the present embodiment.
Comparative example 4
Composite board includes：
Strength layer：Forming material is the fire retardation PC of V0 grade, with a thickness of 0.5mm；
Hard layer：Forming material is PMMA, with a thickness of 0.15mm；
Fire-retardant strengthening layer：Forming material is the forced fluid of model STL-B2-9436, with a thickness of 0.03mm, solidification energy
For 380MJ/cm2。
Comparative example 5
Composite board includes：
Strength layer：Forming material is the fire retardation PC of V0 grade, with a thickness of 0.5mm；
Hard layer：Forming material is scratch resistance PC, with a thickness of 0.15mm；
Fire-retardant strengthening layer：Forming material is the forced fluid of model STL-B2-9436, with a thickness of 0.03mm, solidification energy
For 380MJ/cm2。
Comparative example 6
Composite board includes：
Strength layer：Forming material is PC, with a thickness of 0.4mm；
Hard layer：Forming material is the mixture of PC and acrylic resin and organic siliconresin, acrylic resin and organic
The content of silicone resin is same as Example 1, with a thickness of 0.1mm.
The performance test results of embodiment 1-3 and comparative example 1-6 are as shown in table 1：
Table 1
The composite board that can be seen that the application from the test result of above-described embodiment 1-3 has preferable hardness, anti-zoned
Hurt performance and flame retardant property.
By the way that comparative example 1 and the comparison of embodiment 1 are found, the hardness of the composite board without containing fire-retardant strengthening layer and fire-retardant
Grade is substantially reduced；It is found by comparing comparative example 2 and 3, when forming fire-retardant strengthening layer on the PC or PET sheet material of single layer
The hardness or flame retardant rating of the composite board of acquisition are substantially reduced.Above analysis shows, in this application, preferable hardness and
Flame retardant rating can be reached by the mutual cooperation of hard layer, strength layer and fire-retardant strengthening layer.
It was found that, the forced fluid for not having flame retardant property is selected to be formed by by comparative example 4 and 5 and embodiment 1-3
Composite board surface hardness is lower, and flame retardant rating is lower.
It was found that, the material of fire-retardant strengthening layer will be formed and form the material of hard layer by by comparative example 6 and embodiment 1
It is smaller not as good as the application, such as hardness that the composite board effect that plate and strength layer are compounded to form is prepared into after material mixing again,
Flame retardant rating is lower, and adhesion strength is poor, illustrate can be reached by the mutual cooperation of three ply board material in this application
Preferable effect.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (17)
1. a kind of composite board, which is characterized in that including：
Strength layer；
Hard layer, the hard layer are arranged on the first surface of the strength layer；
Fire-retardant strengthening layer, the fire-retardant strengthening layer are arranged on surface of the hard layer far from the strength layer.
2. composite board according to claim 1, which is characterized in that shape between the fire-retardant strengthening layer and the hard layer
At chemical bonding.
3. composite board according to claim 1, which is characterized in that the material for forming the strength layer includes PC.
4. composite board according to claim 1-3, which is characterized in that the material for forming the hard layer includes
At least one of PC or PMMA.
5. composite board according to claim 1, which is characterized in that the material for forming the fire-retardant strengthening layer includes crosslinking
Compound, the cross-linking compounds are to be reacted by acrylic resin with organic siliconresin.
6. composite board according to claim 4, which is characterized in that the material for forming the fire-retardant strengthening layer further includes：
At least one of silica and flame retardant.
7. composite board according to claim 1, which is characterized in that the strength layer with a thickness of 0.4-0.6mm.
8. composite board according to claim 1, which is characterized in that the hard layer with a thickness of 0.1-0.2mm.
9. composite board according to claim 1, which is characterized in that the fire-retardant strengthening layer with a thickness of 0.01-
0.08mm。
10. a kind of shell, which is characterized in that including the described in any item composite boards of claim 1-9.
11. a kind of electronic equipment, which is characterized in that including shell described in any one of claim 10.
12. a kind of method for preparing the described in any item composite boards of claim 1-9, which is characterized in that including：
Hard layer is formed on the first surface of strength layer；
Fire-retardant forced fluid is coated on surface of the hard layer far from the strength layer and makes the fire-retardant forced fluid solidification, shape
At fire-retardant strengthening layer.
13. according to the method for claim 12, which is characterized in that the fire-retardant forced fluid includes：
Resin, the resin include acrylic resin and organic siliconresin；
Solvent, the solvent are selected from hydroxyl ketone, acylphosphine oxide, isopropanol, at least one of propylene glycol monomethyl ether.
14. according to the method for claim 13, which is characterized in that the fire-retardant forced fluid further includes silica dispersion
At least one of liquid, levelling agent and flame retardant.
15. according to the method for claim 14, which is characterized in that the fire-retardant forced fluid includes：
The acrylic resin 25-55 parts by weight, the organic siliconresin 0.3-0.5 parts by weight, the hydroxyl ketone 24-44 weight
Measure part, the acylphosphine oxide 6-16 parts by weight, the isopropanol 0.4-0.6 parts by weight, the propylene glycol monomethyl ether 1.6-1.8
Parts by weight, the silica dispersions 11.3-25.3 parts by weight, the levelling agent 0.3-0.5 parts by weight, the flame retardant
4-9 parts by weight.
16. according to the method for claim 12, which is characterized in that further include benefit before coating the fire-retardant forced fluid
The step of fire-retardant forced fluid is diluted at least one of toluene, cyclohexanone or ethyl acetate, wherein before dilution
Fire-retardant forced fluid=25-35wt% after fire-retardant forced fluid/dilution.
17. according to the method for claim 12, which is characterized in that the cured mode is ultraviolet light solidification, described solid
The energy of change is 350-410MJ/cm2。
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| CN201810539045.4A CN108928073A (en) | 2018-05-30 | 2018-05-30 | Composite board and preparation method thereof, shell and electronic equipment |
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| CN201810539045.4A CN108928073A (en) | 2018-05-30 | 2018-05-30 | Composite board and preparation method thereof, shell and electronic equipment |
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| CN113573525B (en) * | 2021-07-28 | 2023-02-28 | Oppo广东移动通信有限公司 | Shell assembly, preparation method thereof and electronic equipment |
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Application publication date: 20181204 |