CN110086898A - A kind of mobile terminal component and preparation method thereof - Google Patents
A kind of mobile terminal component and preparation method thereof Download PDFInfo
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- CN110086898A CN110086898A CN201910196619.7A CN201910196619A CN110086898A CN 110086898 A CN110086898 A CN 110086898A CN 201910196619 A CN201910196619 A CN 201910196619A CN 110086898 A CN110086898 A CN 110086898A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of mobile terminal components, including ceramic component, plastic member and adhesive layer；The adhesive layer is for connecting ceramic component and plastic member；The surface that the ceramic component is contacted with adhesive layer is equipped with sandy gravel stratum, and it is 20~400 μm that the partial size of gravel, which is D50, in the sandy gravel stratum.Ceramic component and binding force after plastic cement in-mould injection are strong in component of the present invention, and ceramic component and plastic rubber component junction are not in offset and gap, the subtitle substances such as dust, scurf can either be effectively avoided to adsorb imbedding problem, additionally it is possible to promote the texture and aesthetic feeling of ceramic plastic composite component.The present invention also provides a kind of preparation methods of mobile terminal component, and the preparation method process flow is simple, and operability is high, the mass production suitable for mobile terminal in-mould injection ceramic component.
Description
Technical field
The present invention relates to field of terminal technology, and in particular to a kind of mobile terminal component and preparation method thereof.
Background technique
Nowadays the electronic products such as mobile phone, smartwatch, intelligent electric appliance have become people's daily life indispensable one
Point, the different demands of consumer also promote cell phone manufacturer and major supplier to constantly bring forth new ideas, and create and are more able to satisfy user
Aesthetic and practical electronic product.With the fast development of mechanics of communication, the 5G` epoch are also increasingly closer from us, and the first of 5G
A technical characterstic is exactly millimeter wave, and wavelength is shorter, and its transmission frequency is higher, and transmission speed is also faster.Metal back cover is due to signal
With shielding interference effect, the speed of transmission will limit, so that metal shell is gradually by non-gold at present in mobile terminal industry
Belong to replaced shell, such as the non-metal shells such as ceramics, glass, plastic cement.
Ceramic material highlights the makings of elegant due to its gentle such as beautiful appearance and texture；And relative to glass,
Plastic material, ceramic material have higher intensity, better wear-resisting property etc., the deep favor by mobile phone business men and consumer,
Has application on millet, OPPO, three magnitude middle and high end mobile phones and on the smartwatch such as IWatch, TecWatch at present.
Existing ceramic component has 2D plane and 2.5D differential of the arc structure, 3D curved-surface structure, Unibody integral structure；Wherein,
Unibody integral ceramics component art atmosphere is dense, but practical application is limited by production yields, and forming technology is complicated, adds
Work cost is high, does not have universality at present；In addition, 2D, 3D ceramic component generally pass through bonding or snap connection or two
The compound mode of kind of method and metal or plastic cement center assemble, this structural ceramics component and center fitting surface often exist offset and
Gap, and gap location easily adsorbs the subtitle substances such as dust, scurf, influences whole beauty；Meanwhile the presence of bonding gap
The decline of complete machine weatherability is also resulted in, waterproof and leakproofness are poor.
The patent of 207327452 U of Patent No. CN passes through chemical cleaning, microetch, reaming, surface before in-mould injection
Adjustment and etc., intensive nano aperture is generated on ceramic matrix surface, so that the combination for promoting ceramic matrix and plastic layer is strong
Degree, binding force can reach 300kg/cm2.But ceramic body after acid etching mechanical property can be remarkably decreased, lead to its reality
Using with significant limitation.
Summary of the invention
There is provided it is an object of the invention to overcome in place of the shortcomings of the prior art a kind of mobile terminal component and its
Preparation method.
To achieve the above object, the technical scheme adopted by the invention is as follows: a kind of mobile terminal component, including ceramic component,
Plastic member and adhesive layer；The adhesive layer is for connecting ceramic component and plastic member；
The surface that the ceramic component is contacted with adhesive layer is equipped with sandy gravel stratum, and the partial size of gravel is in the sandy gravel stratum
D50 is 20~400 μm.
The setting sandy gravel stratum that the present invention is contacted in ceramic component with adhesive layer, can increase the roughness on the surface of contact,
Increase contact area, change the surface topography of ceramics, ceramic component mating surface is made to be embedded in or spray a certain amount of sandy gravel stratum, energy
The binding force of enough effective enhancing and plastic cement.Inventors have found that the partial size when gravel is too low, cannot be formed on ceramic component surface
Suitable surface topography causes whole binding force poor；If gravel partial size is excessively high, it will lead to ceramic component surface and big hole occur
Defect is formed by the decline of mobile terminal component integral strength.
It is highly preferred that it is 125~250 μm that the partial size of gravel, which is D50, in the sandy gravel stratum.The ceramic structure in the particle size range
The binding force of part and plastic member is stronger, and the integral strength of mobile terminal component is bigger.
Roughness and partial size are the test result after ceramic cover plate is equipped with sandy gravel stratum, can use following test method
It obtains: plastic member and adhesive layer on removal mobile terminal ceramic component product, the ceramics using scanning electron microscopic observation containing layer of sand
Component surface shoots a variety of photos to cover 800-1000 gravel, then by image analysis software, obtains 800-1000
The equivalent diameter of gravel draws gravel diameter distribution curve, you can get it D50, D90 and D10.
In mobile terminal component of the present invention, plastic member can be formed for in-mould injection, or Fei Monei note
Moulding is at being particularly suitable for in-mould injection component.Ceramic component color multiplicity can be black, white or other colored, such as bird with red feathers
The pure colors such as emerald green, sapphire blue, red, pink colour, gold hit color or gradient color effect.Ceramic component appearance can for highlighted face,
Matte surface etc. and personalized pattern effect etc..Suitable for 3C class product members, such as intelligence wearing class, mobile phone terminal class, household electrical appliances
The electronic products such as class.
Preferably, the partial size D90/D10 of gravel is 0.5~10 in the sandy gravel stratum；It is highly preferred that sand in the sandy gravel stratum
The partial size D90/D10 of gravel is 1.5~6.If the value of D90/D10 is excessively high, ceramic surface is caused to have biggish pit defect, influenced
Ceramic component integral strength；If too low, ceramic surface roughening effect is poor, and certain gravel cannot be remained in ceramic surface, is caused
Ceramics are poor with the binding performance of plastic cement, are not able to satisfy requirement.
Preferably, roughness is 0.02~60 μm on the surface that the ceramic component is contacted with adhesive layer.Pass through inventor
Repetition test the study found that control surface roughness be 0.02~60 μm of intensity that can guarantee ceramic component and ceramic component with
The binding force of plastic member, if Ra > 60um, blasting treatment causes ceramic surface the big hole defect in part occur, reduces whole
Intensity；If Ra < 0.02um, ceramic surface is excessively smooth after sandblasting, and adhesive layer and ceramic component surface adhesion effect are poor, causes
Ceramic component and plastic member binding force are too low, and service performance is not achieved.It is highly preferred that the ceramic component is contacted with adhesive layer
Surface on roughness be 0.2~10 μm.When roughness is at 0.2~10 μm, the binding force of ceramic component and plastic member is more
It is high.
Preferably, the granularity of gravel is 30~500 mesh in the sandy gravel stratum；It is highly preferred that gravel in the sandy gravel stratum
Granularity is 100~300 mesh.Gravel granularity is the test result after ceramic cover plate is equipped with sandy gravel stratum.
Preferably, at least one in following (a)~(g):
(a) structure of the ceramic component is 2D planar structure, 2.5D differential of the arc structure, 3D curved-surface structure and Unibody mono-
At least one of body formula structure；
(b) thickness >=0.1mm of the ceramic component；
(c) material of the ceramic component is at least one of zirconium oxide, aluminium oxide and silicon nitride；
(d) structure of the plastic member is 2D planar structure, 2D differential of the arc structure, 3D curved-surface structure and Unibody one
At least one of formula structure；
(e) plastic member with a thickness of 0.1~3.0mm；
(f) material of the plastic member be PC, PPS, PES, ABS, PMMA, PBT, PA, PARA basis material in extremely
A kind of at least one of few or/and PC, PPS, PES, ABS, PMMA, PBT, PA, PARA basis material containing glass fibre, institute
State content >=10% of glass fibre；
(g) gravel is at least one of corundum sand, white fused alumina sand, glass sand and silicon carbide sand.
Inventor has found by Experimental Comparison, using energy when corundum sand, white fused alumina sand, glass sand or silicon carbide sand sandblasting
Enough hit well to ceramic surface progress reaches ideal roughening effect, while the process to collide with ceramic surface can have portion again
Sub-sand gravel is mounted to ceramic surface and is integrally formed with ceramic surface；The remaining gravel of ceramic surface and the adhesive layer energy again in injection molding
Good bond effect is played, effective injection molding bond strength of ceramic structures and plastic parts is promoted.Especially when gravel is glass
When glass sand, roughing in surface effect is even more ideal, and and adhesive layer injection molding when can play better bond effect.
Ceramic component surface gravel residual component can carry out material phase analysis by X-ray diffractometer；It is scanned using Flied emission
Electronic Speculum can carry out observation judgement to ceramic component faying face surface topography；Ceramic component faying face can be had using blasting treatment
The enhancing of effect and the binding force of plastic cement.
Preferably, the material of the adhesive layer be acrylic resin, polyurethane resin, polyamide, silane coupling agent,
At least one of acetic acid-vinyl acetate resin, epoxy resin and thermoplastic elastomer (TPE).The thermoplastic elastomer (TPE) include SIS,
Butadiene-styrene rubber, nitrile rubber or neoprene.
It is highly preferred that the material of the adhesive layer is polyurethane resin and/or polyamide.Polyurethane resin and polyamides
The adhesive effect of polyimide resin is better than the adhesive effect of other resins.
Preferably, the R value of the polyurethane resin is 2.0~8.0.In ceramic component and plastic member, polyurethane tree
The adhesive effect of rouge is preferable, and especially when between polyurethane R value 2.0~8.0, adhesive effect is more preferably.Because working as polyamide resin
The R value of rouge is higher than that 8 adhesives are too hard, and shock resistance is deteriorated, and solidification process is easy to produce bubble, and the R of polyamide
Binder is too soft when value is less than 2, and cohesive strength is lower.The polyurethane resin is more preferably moisture cure urethanes.
The polyurethane resin is synthesized by isocyanates and polyalcohol, and isocyanates can select aromatic series or alicyclic different
At least one of cyanate, preferably isophorone diisocyanate.Polyester or polyether-type, preferably poly- tetrahydro can be selected in polyalcohol
At least one of furans glycol, trimethylolpropane and polytetrahydrofuran trihydroxylic alcohol.Wherein, chain extension can be added in synthesis process
Agent, the chain extender are preferably at least one of 1,3-BDO, trimethylolpropane and MOCA.The polyurethane contains ammonia
Carbamate base functional group, and remain the isocyanate component in raw material synthesis process in polyurethane.
Preferably, the molecular weight of the material of the adhesive layer is 4~350,000.It is highly preferred that the material of the adhesive layer
Molecular weight include 4~80,000 low molecular weight compound and molecular weight be 18~350,000 high-molecular weight compounds；The low molecule
Measure the weight ratio of compound and high-molecular weight compounds are as follows: low molecular weight compound: high-molecular weight compounds=1:3~11.
Inventors have found that using the compound of low molecular weight and high molecular weight collocation in use, adhesive effect more preferably.Due to
The compound of low molecular weight can reduce viscosity, and ceramic base material sand blasted surface can be further soaked under injection temperature, improve anchoring
Effect, and the compound of low molecular weight and feeding melt consolute, can improve the adhesive force at two interfaces；And the change of high molecular weight
High cohesive strength can be provided by closing object, absorbed two kinds of material different heat expansion bring shear stresses and fallen bring and vertically rush
It hits.Inventor by test obtains, if low molecular weight compound accounting too low injection when wetability can be deteriorated, be easy to produce boundary
Face is destroyed；Glue-line cohesive strength is low if high-molecular weight compounds accounting is too low, is easy to produce cohesional failure.Work as low molecular weight
When compound and high-molecular weight compounds use above-mentioned weight proportion, more preferably, the molecular weight in the present invention refers both to weight to adhesive effect
Average molecular weight.
It is highly preferred that the molecular weight of the material of the adhesive layer includes 4~80,000 low molecular weight compound and molecular weight is
24~280,000 high-molecular weight compounds.Adhesive effect when being arranged in pairs or groups using the compound of the molecular weight is more preferably.
Preferably, the thickness of dry film of the adhesive layer is 1~300 μm；The thickness of adhesive layer is too thick, is easy in falling process
Adhesive layer fragmentation is caused, and increases cost, will affect the aesthetic effect of shell；Too thin, adhesive effect is not achieved of the invention
Effect.It is highly preferred that the thickness of dry film of the adhesive layer is 30~150 μm.Most preferably, the thickness of dry film of the adhesive layer is
30~80 μm.
The object of the invention is also to provide the preparation methods of the mobile terminal component, comprising the following steps:
(1) surface that ceramic component is contacted with adhesive layer uses blasting treatment；
(2) surface of the ceramic component after blasting treatment is applied into adhesive layer, solidification；
(3) component that step (2) obtains is placed in mold and plastic member is made, obtain the mobile terminal component.
By blasting treatment, make ceramic component remained on surface gravel, on the one hand, improve ceramic component surface bond area
It is acted on mechanical anchor；On the other hand, ceramic component gravel remained on surface and adhesive layer it is secondary react generate it is stronger
Hydrogen bond, enhance intramolecular force.Meanwhile adhesive layer can penetrate into inside the plastic cement surface layer after swelling, it is anti-with the reactive hydrogen in plastic cement
Covalent bond should be generated.Final effect is to enhance the interface binding intensity of ceramic component and plastic rubber component.Therefore, ceramic component knot
Conjunction face applies adhesive layer solidification after blasting craft is handled, then by injection molding, greatly improves ceramic component and plastic mold
The bond strength of interior injection molding.
Blasting treatment of the present invention, which is more than, improves roughness, increases surface area, even more in order to increase ceramic watch
Face energy and surface-active, are embedded in or are sprayed certain thickness sandy gravel stratum by sandblasting, and sandy gravel stratum and ceramic component form one
Whole, the group of absorption water and hydrogen bond is contained on surface, can generate stronger hydrogen bond with adhesive layer, substantially increase intermolecular
Cohesive force；Specially organic matter contains a large amount of hydrogen atom in adhesive layer, can with the electronegativity such as the silicon, the oxygen that contain in gravel compared with
Strong atom forms hydrogen bond.And the technique of ceramic surface processing more optimizes, and process cycle process is short, ceramic component and plastic cement
Component binding force is higher, is conducive to reduce industrial cost, is suitable for industrial mass production.
Ceramic component can be pre-processed before sandblasting, to remove ceramic component surface impurity and grease.Ceramic component
Ultrasonic cleaning can be carried out after surface sand-blasting process, to remove the extra gravel of ceramic component surface attachment.It is viscous after application
Knot layer can place 0.5~6h naturally dry or baking-curing.
In step (1), 10~120s of blast time of the blasting treatment, 0.1~0.6MPa of pressure.
In step (2), adhesive layer is applied using dispensing, coating, showering or printing；The cured temperature is 50~120
DEG C, the cured time is 1~15min.
In step (3), the barrel temperature of the injection molding is 250~350 DEG C, and mould temperature is 80~150 DEG C, injection pressure 80
~150Mpa, material temperature are 200~320 DEG C.
Mould temperature indicates that the temperature of mold, material temperature indicate the temperature of material when injection molding.In relation to the major parameter in Shooting Technique,
Such as issuing velocity, dwell time, dwell pressure, cooling time difference due to injection-moulding device model and manufacturer, meeting in implementation
There is details difference, is not described in detail herein.
The beneficial effects of the present invention are: the present invention provides a kind of mobile terminal component, in the component ceramic component with
Binding force is strong after plastic cement in-mould injection, is formed by ceramic component in mobile terminal component and is up to plastic member binding force
A series of 1424N, even if faying face is still able to maintain good bond strength, and ceramic component and plastic cement after environmental testings
Component junction is not in offset and gap, can either effectively avoid the subtitle substances such as dust, scurf from adsorbing imbedding problem, also
It is able to ascend the texture and aesthetic feeling of ceramic plastic composite component.
The present invention also provides a kind of preparation method of mobile terminal component, the surface that ceramic component is contacted with adhesive layer is passed through
After blasting treatment, apply adhesive layer, can be generated with plastic cement after in-mould injection and firmly combine effect.Product is by whole
Machine drop test, environmental reliability test after faying face will not it is peeling-off, cracking phenomena such as；And by the process
Ceramic component surface does not contain conductive materials, and the ceramic plastic composite component transmits noiseless shielding action to signal, can
Meet requirement of the 5G epoch mobile terminal to material.In addition, the ceramic component process flow for carrying out surface treatment is simple, in addition to sandblasting,
Apply adhesive layer and solidification is outer, there is no additional process process, operability is high, the high-volume suitable for mobile terminal ceramic component
Production.
Detailed description of the invention
Fig. 1 is the first structure chart of mobile terminal component of the invention；
Fig. 2 is second of structure chart of mobile terminal component of the invention；
Fig. 3 is the third structure chart of mobile terminal component of the invention；
Fig. 4 is the structural schematic diagram of plastic injection glass power test-strips in ceramic die；
Wherein, 1 is ceramic component, and 2 be plastic member, and 3 be adhesive layer.
Specific embodiment
Ceramic component described in embodiment is ceramic mobile phone structural member (ceramic mobile phone cover board or handset shell), and material is oxidation
Zirconium, remaining used raw material and equipment are commercially available.
In embodiment, the juncture of ceramic component and plastic member can be diversified forms, can be using such as Fig. 1~3
Structural schematic diagram shown in combination, Fig. 1 and Fig. 2 are the injection-moulded plastic component on the ceramic component of plane, and Fig. 3 is in arc
Injection-moulded plastic component on shape ceramic component.
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
Embodiment 1
A kind of embodiment of mobile terminal component of the present invention, mobile terminal component described in the present embodiment include ceramic structure
Part, plastic member and adhesive layer；The adhesive layer is for connecting ceramic component and plastic member；The ceramic component and adhesive layer
The surface of contact is equipped with sandy gravel stratum, and it is 65 μm that the partial size of gravel, which is D50, in the sandy gravel stratum, and roughness is 20 μm, and gravel is
White corundum sand；The ceramic component is the black ceramic cover board with a thickness of 0.5mm；The plastic member is PA material；It is described
The material of adhesive layer is hot melt acrylic resin, be acrylic resin that molecular weight is 4.2 ten thousand and molecular weight be 200,000 third
The mixture of olefin(e) acid resin, the quality of the acrylic resin that the acrylic resin and molecular weight that molecular weight is 4.2 ten thousand are 200,000 it
Than are as follows: 1:9, the thickness of dry film of the adhesive layer are 40 μm.
The preparation method of mobile terminal component described in the present embodiment the following steps are included:
(1) using the black ceramic cover board with a thickness of 0.5mm, it is pre-processed, to remove surface impurity and grease；
(2) blasting treatment is carried out to the surface that ceramic cover plate is contacted with adhesive layer, sand mold selects the white corundum of 200 mesh
Sand, to ceramic cover plate faying face sandblasting 60s, blasting pressure 0.3MPa, sandblasting rear surface is matt effect；
(3) apply one layer of acrylic acid on the surface contacted using ceramic cover plate of the dispenser after blasting treatment with adhesive layer
The ceramic cover plate for coating adhesive layer is put into baking oven, in order to shorten the curing time of glue 65 by resin hot melt adhesive layer
DEG C baking 3min, adhesive layer solidification after on ceramic cover plate formed one layer of dry film；
(4) ceramic cover plate for applying adhesive layer placement is subjected to injection molding in a mold, is molded time control molding temperature 80
~90 DEG C, for material temperature at 200~210 DEG C, injection pressure is 100~120MPa, obtains the mobile terminal component.
Embodiment 2
A kind of embodiment of mobile terminal component of the present invention, mobile terminal component described in the present embodiment include ceramic structure
Part, plastic member and adhesive layer；The adhesive layer is for connecting ceramic component and plastic member；The ceramic component and adhesive layer
The surface of contact is equipped with sandy gravel stratum, and it is 120 μm that the partial size of gravel, which is D50, in the sandy gravel stratum, and roughness is 8 μm, and gravel is
White corundum sand and glass sand；The ceramic component is the jadite ceramic cover plate of 0.5mm；The plastic member is PPS material
Material；The material of the adhesive layer is hot melt polyurethane resin, is polyurethane resin that molecular weight is 4.9 ten thousand and molecular weight is 21
The mixture of ten thousand polyurethane resin, the polyurethane resin that the polyurethane resin and molecular weight that molecular weight is 4.9 ten thousand are 210,000
Mass ratio are as follows: 1:6, R value are 6, and the thickness of dry film of the adhesive layer is 320 μm.
The preparation method of mobile terminal component described in the present embodiment the following steps are included:
(1) using with a thickness of 0.5mm jadite ceramic cover plate, it is pre-processed, with remove surface impurity and
Grease；
(2) blasting treatment is carried out to the surface that ceramic cover plate is contacted with adhesive layer, sand mold selects the white corundum sand of 150 mesh
With the glass sand of 100 mesh, to ceramic cover plate faying face sandblasting 100s, blasting pressure 0.4MPa, sandblasting rear surface is matt effect；
(3) apply a strata urethane on the surface contacted using ceramic cover plate of the dispenser after blasting treatment with adhesive layer
The ceramic cover plate for coating adhesive layer is put into baking oven, in order to shorten the curing time of bonding 85 by resin hot melt adhesive layer
DEG C baking 1.5min, adhesive layer solidification after on ceramic cover plate formed one layer of dry film；
(4) ceramic cover plate for applying adhesive layer placement is subjected to injection molding in a mold, is molded time control molding temperature 100
~120 DEG C, for material temperature at 310~320 DEG C, injection pressure is 80~90MPa, obtains the mobile terminal component.
Embodiment 3
A kind of embodiment of mobile terminal component of the present invention, mobile terminal component described in the present embodiment include ceramic structure
Part, plastic member and adhesive layer；The adhesive layer is for connecting ceramic component and plastic member；The ceramic component and adhesive layer
The surface of contact is equipped with sandy gravel stratum, and it is 150 μm that the partial size of gravel, which is D50, in the sandy gravel stratum, and roughness is 25 μm, and gravel is
Glass sand and corundum sand；The ceramic component is the whiteware cover board with a thickness of 0.5mm；The plastic member is PC material
Material；The material of the adhesive layer is hot melt silane coupling agent, is silane coupling agent that molecular weight is 5.2 ten thousand and molecular weight is 26
The mixture of ten thousand silane coupling agent, the silane coupling agent that the silane coupling agent and molecular weight that molecular weight is 5.2 ten thousand are 260,000
Mass ratio are as follows: 1:5, the thickness of dry film of the adhesive layer are 80 μm.
The preparation method of mobile terminal component described in the present embodiment the following steps are included:
(1) using the whiteware cover board with a thickness of 0.5mm, it is pre-processed, to remove surface impurity and grease；
(2) blasting treatment is carried out to the surface that ceramic cover plate is contacted with adhesive layer, sand mold selects the glass sand and 200 of 80 mesh
Purpose corundum sand, to ceramic cover plate faying face sandblasting 70s, blasting pressure 0.5MPa, sandblasting rear surface is matt effect；
(3) apply one layer of silane idol on the surface contacted using ceramic cover plate of the dispenser after blasting treatment with adhesive layer
The ceramic cover plate for coating adhesive layer is put into baking oven by connection agent adhesive layer in order to shorten the curing time of adhesive layer, in 95 DEG C of rings
1min is toasted under border, and one layer of dry film is formed on ceramic cover plate after adhesive layer solidification；
(4) ceramic cover plate for applying adhesive layer placement is subjected to injection molding in a mold, is molded time control molding temperature 90
~100 DEG C, for material temperature at 250~260 DEG C, injection pressure is 140~150MPa, obtains the mobile terminal component.
Embodiment 4
A kind of embodiment of mobile terminal component of the present invention, mobile terminal component described in the present embodiment include ceramic structure
Part, plastic member and adhesive layer；The adhesive layer is for connecting ceramic component and plastic member；The ceramic component and adhesive layer
The surface of contact is equipped with sandy gravel stratum, and it is 30 μm that the partial size of gravel, which is D50, in the sandy gravel stratum, and roughness is 10 μm, and gravel is
Glass sand；The ceramic component is the whiteware cover board with a thickness of 0.5mm；The plastic member is PC material；The bonding
The material of layer is hot melt polyamide, is the polyamide that molecular weight is 6.6 ten thousand and the polyamides that molecular weight is 27.2 ten thousand
The mixture of polyimide resin, the quality of the polyamide that the polyamide and molecular weight that molecular weight is 6.6 ten thousand are 27.2 ten thousand it
Than are as follows: 1:8, the thickness of dry film of the adhesive layer are 40 μm.
The preparation method of mobile terminal component described in the present embodiment the following steps are included:
(1) using the whiteware cover board with a thickness of 0.5mm, it is pre-processed, to remove surface impurity and grease；
(2) blasting treatment is carried out to the surface that ceramic cover plate is contacted with adhesive layer, sand mold selects the glass sand of 300 mesh, right
Ceramic cover plate faying face sandblasting 70s, blasting pressure 0.5MPa, sandblasting rear surface is matt effect；
(3) apply a strata amide on the surface contacted using ceramic cover plate of the dispenser after blasting treatment with adhesive layer
The ceramic cover plate for coating adhesive layer is put into baking oven, in order to shorten the curing time of glue 90~100 by resin-bonded layer
2min is toasted under DEG C environment, and one layer of dry film is formed on ceramic cover plate after adhesive layer solidification；
(4) ceramic cover plate for applying adhesive layer placement is subjected to injection molding in a mold, is molded time control molding temperature 90
~100 DEG C, for material temperature at 280~290 DEG C, injection pressure is 110~120MPa, obtains the mobile terminal component.
Embodiment 5
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer are as follows: molecular weight is 5.5 ten thousand
Acetic acid-vinyl acetate resin mixture that acetic acid-vinyl acetate resin and molecular weight are 30.2 ten thousand, molecular weight are 5.5 ten thousand
Acetic acid-vinyl acetate resin mass ratio that acetic acid-vinyl acetate resin and molecular weight are 30.2 ten thousand are as follows: 1:8.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 6
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer are as follows: molecular weight is 6.5 ten thousand
The mixture for the epoxy resin that epoxy resin and molecular weight are 320,000, the epoxy resin and molecular weight that molecular weight is 6.5 ten thousand are 32
The mass ratio of ten thousand epoxy resin are as follows: 1:8.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 7
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer are as follows: in thermoplastic elastomer (TPE)
Butadiene-styrene rubber is the mixture of the thermoplastic elastomer (TPE) that molecular weight is 4.9 ten thousand and the thermoplastic elastomer (TPE) that molecular weight is 260,000, point
The mass ratio for the thermoplastic elastomer (TPE) that the thermoplastic elastomer (TPE) and molecular weight that son amount is 4.9 ten thousand are 260,000 are as follows: 1:8.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 8
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer are as follows: molecular weight is 7.5 ten thousand
The mixture for the polyamide that polyamide and molecular weight are 21.5 ten thousand, the polyamide and divide that molecular weight is 7.5 ten thousand
The mass ratio for the polyamide that son amount is 21.5 ten thousand are as follows: 1:8.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 9
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer be molecular weight be 80,000 it is poly-
The mixture for the polyurethane resin that amide resin and molecular weight are 180,000, the polyamide and molecular weight that molecular weight is 80,000 are
The mass ratio of 180000 polyamide are as follows: 1:8, the R value of polyurethane resin are 4.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 10
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer are as follows: polyamide, for point
The polyamide that son amount is 6.6 ten thousand.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 11
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The material that the difference is that only adhesive layer difference, in the present embodiment, the material of adhesive layer are as follows: polyamide, for point
The polyamide that son amount is 27.2 ten thousand.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 12
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The quality that the difference is that only the polyamide that molecular weight is 6.6 ten thousand and the polyamide that molecular weight is 27.2 ten thousand it
Than are as follows: 1:3.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 13
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The quality that the difference is that only the polyamide that molecular weight is 6.6 ten thousand and the polyamide that molecular weight is 27.2 ten thousand it
Than are as follows: 1:11.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 14
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 300 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 15
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 250 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 16
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 150 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 17
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 100 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 18
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 80 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 19
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 50 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 20
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 30 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 21
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 10 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 22
Mobile terminal component described in a kind of embodiment of mobile terminal component of the present invention, the present embodiment and embodiment 4
The thickness that the difference is that only the adhesive layer difference, the thickness of dry film of adhesive layer described in the present embodiment is 1 μm.
The preparation method of mobile terminal component is the same as embodiment 4 described in the present embodiment.
Embodiment 23~26
The mobile terminal component of embodiment 23~26 the difference is that only with mobile terminal component described in embodiment 4
Granularity and the roughness difference of the partial size of gravel, gravel used, are shown in Table 1 in the sandy gravel stratum.
The grain of the partial size of gravel in 1 embodiment 23~26 of table, the sandy gravel stratum of comparative example 1~2, roughness and gravel used
Degree
| Group | Partial size D50 (μm) | Granularity (mesh) | Roughness (μm) |
| Embodiment 16 | 400 | 35 | 52 |
| Embodiment 17 | 20 | 500 | 0.02 |
| Embodiment 18 | 480 | 30 | 60 |
| Embodiment 19 | 75 | 180 | 34 |
| Comparative example 1 | 15 | 625 | 0.015 |
| Comparative example 2 | 605 | 24 | 70 |
Comparative example 3
A kind of comparative example of mobile terminal component of the present invention, mobile terminal component and embodiment 4 described in this comparative example
The difference is that only without adhesive layer, mobile terminal component described in this comparative example includes ceramic component and plastic member；Institute
It states the surface that ceramic component is contacted with plastic member and is equipped with sandy gravel stratum, it is 30 μm that the partial size of gravel, which is D50, in the sandy gravel stratum,
Roughness is 10 μm, and gravel is glass sand；The ceramic component is the whiteware cover board with a thickness of 0.5mm；The plastics structure
Part is PC material.
The preparation method of mobile terminal component described in this comparative example the following steps are included:
(1) using the whiteware cover board with a thickness of 0.5mm, it is pre-processed, to remove surface impurity and grease；
(2) blasting treatment is carried out to the surface that ceramic cover plate is contacted with adhesive layer, sand mold selects the glass sand of 300 mesh, right
Ceramic cover plate faying face sandblasting 70s, blasting pressure 0.5MPa, sandblasting rear surface is matt effect；
(3) the ceramic cover plate placement after sandblasting is subjected to injection molding in a mold, is molded time control molding temperature 90~100
DEG C, for material temperature at 280~290 DEG C, injection pressure is 110~120MPa, obtains the mobile terminal component.
Comparative example 4
A kind of comparative example of mobile terminal component of the present invention, mobile terminal component and embodiment 1 described in this comparative example
The difference is that only on surface that the ceramic component is contacted with adhesive layer without sandy gravel stratum, described in this comparative example it is mobile eventually
Holding component includes ceramic component, plastic member and adhesive layer；The ceramic component is the black ceramic cover board with a thickness of 0.5mm；
The plastic member is PA material；The material of the adhesive layer is hot melt acrylic resin, is the propylene that molecular weight is 4.2 ten thousand
The mixture for the acrylic resin that acid resin and molecular weight are 200,000, the acrylic resin and molecular weight that molecular weight is 4.2 ten thousand are
The mass ratio of 200000 acrylic resin are as follows: 1:1, the thickness of dry film of the adhesive layer are 40 μm.
The preparation method of mobile terminal component described in this comparative example the following steps are included:
(1) using the black ceramic cover board with a thickness of 0.5mm, it is pre-processed, to remove surface impurity and grease；
(2) apply one layer of acrylic resin hot melt on the surface that ceramic cover plate is contacted with adhesive layer using dispenser to glue
The ceramic cover plate for coating adhesive layer is put into baking oven by knot layer in order to shorten the curing time of glue, in 65 DEG C of baking 3min,
One layer of dry film is formed on ceramic cover plate after adhesive layer solidification；
(3) ceramic cover plate for applying adhesive layer placement is subjected to injection molding in a mold, is molded time control molding temperature 80
~90 DEG C, for material temperature at 200~210 DEG C, injection pressure is 100~120MPa, obtains the mobile terminal component.
Embodiment 27
The ceramic component in-mould injection and plastic cement binding force of Examples 1 to 26 and the component of comparative example 1~4 are done reliably
Property test, actual performance is horizontal after verifying ceramic cover plate surface treatment, and test specifically includes complete machine drop test, roller falls survey
Examination, environmental testing and peel test force.The primary condition that each experiment uses is as follows:
1, complete machine drop test: 1.0~1.5m of falling height, falling direction is that four side of product peripheral and ceramic component are big
Face.
2, roller drop test: roller height 1.0m, test period 75 enclose, 2 circulations.
3, test, salt spray test, boiling environmental testing: are stored including cooling thermal impact test, constant temperature and humidity test, high/low temperature
Test etc.；It is used in the present embodiment:
A) cooling thermal impact test condition: low temperature -40 spends (1h), and 75 degree of high temperature (1h) are gone in 1min；Recurring number: 40 follow
Ring (80h).
B) constant temperature and humidity test condition: temperature, 75 degree；Humidity, 91%-95%；Time, 168h.
C) low temperature stores test condition: temperature, -40 degree；Time, 96h.
D) high temperature storage test condition: temperature, 75 degree；Time, 96h.
E) boiling test condition: 80 degree of water-baths, time 30min, product cannot contact chamber wall.
F) salt spray test condition: temperature, 35 degree；NaCl concentration, 5%；PH value, 6.5~7.2；Time, 96h.
4, peel test force: ceramic cover plate is substituted in the present invention using ceramic test item and carries out peeling force validation test.
As shown in figure 4, " 1 " is ceramic component, size: 50mm X 10mm；" 2 " are plastic rubber component, and size is consistent with ceramic test item.
Peel test force direction be divided into X to and Z-direction.
Test result is shown in Table 2.
2 reliability test result of table
1, test result is as follows for the items of component described in Examples 1 to 26:
Drop testing results: pass through 1.0m height, after four side of product peripheral, big face fall circulation 2 times, although plastic cement table
There are slight depression, cracking phenomena in face；But the combination interface of ceramic component and plastic cement is still firmly combined, and does not remove
Phenomenon.
Environmental testing result: there is not peeling in combination interface between ceramic component and plastic cement.After environmental testing again into
Row 1.2m drop test, peripheral four sides, which continuously recycle, to be fallen 10 times, and ceramic component is still firmly combined with plastic cement combination interface, does not have
Occur peeling.
Peel test force result: providing 10 black ceramic test-strips of same level, according to 1~19 technique item of embodiment
Part is surface-treated ceramic test item, then carries out in-mould injection molding, stands and carries out X, Z-direction peel test force afterwards for 24 hours.Most
Whole peel test force the results are shown in Table 1.
2, ceramic strip injection molding result in comparative example 1:
Ceramic test sandblasting rear surface does not form suitable pattern, and surface roughness is too low, in environmental testing, pottery
There is not peeling in combination interface between porcelain component and plastic cement.But in drop test, occur between ceramic component and plastic cement
Recess and slight crack；During peel test force, the surface binding force for ceramic component and plastic member occur is relatively low.
3, ceramic strip injection molding result in comparative example 2:
There is biggish hole defect in ceramic test sandblasting rear surface, and surface roughness is excessive, in drop test, modeling
There is slight depression in glue surface.In environmental testing and peel test force, performance is good, does not occur peeling.
4, ceramic strip injection molding result in comparative example 3:
Ceramic test surface coats one layer of acrylic resin hot melt adhesive layer, but ceramic test surface does not carry out
Sandblasting pretreatment, from test result as can be seen that enough binding forces cannot be provided for ceramic in-mould injection by depending merely on adhesive layer.
5, ceramic strip injection molding result in comparative example 4:
Blasting treatment has only been done on ceramic test surface, does not apply adhesive layer；After injection molding, ceramic test item and modeling
It is effectively combined between glue without generating, almost without binding force.Drop test, environmental testing and peel test force are not carried out.
Cause peeling force in the presence of poor from can be seen that different disposal technique in the test result of above-described embodiment and comparative example
It is different.When can be seen that from the test of embodiment 1~11 using polyamide and/or polyurethane resin, ceramic component and plastic cement
Between binding force level it is more excellent, compared with the promotion that treatment process peel force value in 103895274 B of patent No. CN has several times.And
And when being used cooperatively using high molecular weight and low molecular weight, better than the bonding layer material for only using high molecular weight or low molecular weight.
It can be seen that the increase with adhesive layer thickness of dry film from the test result of embodiment 4,14~22 and comparative example 1~2, ceramics
Binding force between component and plastic cement increases, but drop testing results show that the thickness of adhesive layer is thicker, and adhesive layer is easier to occur
Rupture.Thickness of dry film is 1~300 μm of adhesive effect preferably and the probability that ruptures of adhesive layer is lower.When thickness of dry film is 30
At~150 μm, it is lower that adhesive effect can reach the probability that preferably horizontal and adhesive layer ruptures.From embodiment 4 and implement
23~26 test result of example can be seen that partial size and roughness using gravel in sandy gravel stratum to the knot between ceramic component and plastic cement
Resultant force have large effect, in sandy gravel stratum the partial size of gravel be D50 be 20~400 μm and roughness be 0.02~60 μm have compared with
When good binding force, especially partial size are 125~250 μm, the binding force between ceramic component and plastic cement is more preferable.
The ceramic component handled in Examples 1 to 26 carries out in-mould injection, and product is in drop test, environmental testing link
Splendid level is shown, test result is able to satisfy the performance requirement of the 3C electronic product such as mobile phone terminal.Using in this patent
Adhesive layer to environment almost without pollution, and do not contain metallic conduction substance；Pass through the molding ceramic plastic of in-mould injection
Composite component transmits unshielded interference effect to signals such as mobile phone, smart electronics products, can satisfy the 5G epoch to material electrical property
It can require.In addition, the ceramic component process flow for carrying out surface treatment is simple, it is not attached other than sandblasting, applying adhesive layer and solidification
Add process flow, and operability is high.The patented method is extremely applicable to the large quantities of of mobile terminal in-mould injection ceramic component
Amount production.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (10)
1. a kind of mobile terminal component, which is characterized in that including ceramic component, plastic member and adhesive layer；The adhesive layer is used
In connection ceramic component and plastic member；
The surface that the ceramic component is contacted with adhesive layer is equipped with sandy gravel stratum, and the partial size of gravel is that D50 is in the sandy gravel stratum
20~400 μm.
2. mobile terminal component as described in claim 1, which is characterized in that it is 125 that the partial size of gravel, which is D50, in the sandy gravel stratum
~250 μm.
3. mobile terminal component as described in claim 1, which is characterized in that the partial size D90/D10 of gravel is in the sandy gravel stratum
0.5~10；Preferably, the partial size D90/D10 of gravel is 1.5~6 in the sandy gravel stratum.
4. mobile terminal component as described in claim 1, which is characterized in that on the surface that the ceramic component is contacted with adhesive layer
Roughness is 0.02~60 μm；Preferably, roughness is 0.2~10 μm on the surface that the ceramic component is contacted with adhesive layer.
5. mobile terminal component as described in claim 1, which is characterized in that the granularity of gravel is 30~500 in the sandy gravel stratum
Mesh；Preferably, the granularity of gravel is 100~300 mesh in the sandy gravel stratum.
At least one of 6. mobile terminal component as described in claim 1, which is characterized in that in following (a)~(g):
(a) structure of the ceramic component is 2D planar structure, 2.5D differential of the arc structure, 3D curved-surface structure and Unibody integral type
At least one of structure；
(b) thickness >=0.1mm of the ceramic component；
(c) material of the ceramic component is at least one of zirconium oxide, aluminium oxide and silicon nitride；
(d) structure of the plastic member is 2D planar structure, 2D differential of the arc structure, 3D curved-surface structure and Unibody integral type knot
At least one of structure；
(e) plastic member with a thickness of 0.1~3.0mm；
(f) material of the plastic member is at least one in PC, PPS, PES, ABS, PMMA, PBT, PA, PARA basis material
At least one of kind or/and PC, PPS, PES, ABS, PMMA, PBT, PA, PARA basis material containing glass fibre, the glass
Content >=10% of glass fiber；
(g) gravel is at least one of corundum sand, white fused alumina sand, glass sand and silicon carbide sand.
7. mobile terminal component as described in claim 1, which is characterized in that the material of the adhesive layer is acrylic resin, gathers
In urethane resin, polyamide, silane coupling agent, acetic acid-vinyl acetate resin, epoxy resin and thermoplastic elastomer (TPE) extremely
Few one kind；Preferably, the material of the adhesive layer is polyurethane resin and/or polyamide；Preferably, the polyurethane tree
The R value of rouge is 2.0~8.0.
8. mobile terminal component as claimed in claim 6, which is characterized in that the molecular weight of the material of the adhesive layer is 4~35
Ten thousand；Preferably, the molecular weight of the material of the adhesive layer includes 4~80,000 low molecular weight compound and molecular weight is 18~35
Ten thousand high-molecular weight compounds；The weight ratio of the low molecular weight compound and high-molecular weight compounds are as follows: low molecule quantization
Close object: high-molecular weight compounds=1:3~11.
9. mobile terminal component as described in claim 1, which is characterized in that the thickness of dry film of the adhesive layer is 1~300 μm；
Preferably, the thickness of dry film of the adhesive layer is 30~150 μm；Preferably, the thickness of dry film of the adhesive layer is 30~80 μm.
10. the preparation method of mobile terminal component as described in any one of claim 1~9, which is characterized in that including following step
It is rapid:
(1) surface that ceramic component is contacted with adhesive layer uses blasting treatment；
(2) surface of the ceramic component after blasting treatment is applied into adhesive layer, solidification；
(3) component that step (2) obtains is placed in mold and plastic member is made, obtain the mobile terminal component.
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