CN102162097A - Precoating aluminum plate for electronic device - Google Patents
Precoating aluminum plate for electronic device Download PDFInfo
- Publication number
- CN102162097A CN102162097A CN2011100485564A CN201110048556A CN102162097A CN 102162097 A CN102162097 A CN 102162097A CN 2011100485564 A CN2011100485564 A CN 2011100485564A CN 201110048556 A CN201110048556 A CN 201110048556A CN 102162097 A CN102162097 A CN 102162097A
- Authority
- CN
- China
- Prior art keywords
- aluminum plate
- electronics
- coated aluminum
- resin involucra
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
The invention provides a precoating aluminum plate for an electronic device, the precoating aluminum plate is advantaged by excellent conductivity, lubrication, fingerprint resistance, flaw resistance, and corrosion resistance, as well as suitable environmental protection. A precoating aluminum plate (10) is characterized in that, a substrate processing film containing chromium is not disposed on at least one surface of an aluminum blank (11) with an arithmetic average roughness Ra of 0.3 microns to 0.5 microns, and a resin film (12) is formed, the resin film (12) does not comprise metallic elements, but comprises an acrylic resin ingredient, an polyurethane resin ingredient, a silica ingredient and a particle-shaped lubrication ingredient, content of the silica ingredient takes up more than 12 mass% of the resin film (12), content of the lubrication ingredient contained in the resin film (12) takes up more than 8 mass %, average film thickness of the resin film (12) is 0.15 microns to 1.0 microns, and a resistance measured via a particular method is below 10 Omega.
Description
Technical field
The present invention relates to the pre-coated aluminum plate that uses as the housing of electronics and structural member etc. by the processing that is shaped.
Background technology
Aluminium sheet (comprising aluminium alloy plate) is owing to have high strength and plasticity concurrently, and comparable steel plate is gently a lot, therefore by implementing shaping miscellaneous, is applied to container, paper tinsel, electric product, Automobile Products, also has various uses such as building materials.
The molding of aluminium sheet carries out surface treatment sometimes according to the purposes and the environment that use for improving outward appearance and erosion resistance etc.At this, as carrying out the surface-treated method, from viewpoints such as the simplification of mass productivity, manufacturing process, cost reductions, the preferred utilization in advance carried out the precoating method that surface treatment forms the pre-coated aluminum plate of epithelium to the aluminium sheet before the extrusion molding.
In addition, pre-coated aluminum plate in recent years is in order to adapt to the diversified and superior of goods, equipment, the functional pre-coated aluminum plate of having given various functions, for example anti-finger printing, anti-crackle, electroconductibility (ground connection connectivity), thermal diffusivity, thermal insulation, germ resistance, mildew resistance, wetting ability, repellency, oilness etc. is developed, and extensively popularizes.Wherein, as the pre-coated aluminum plate of electronics, the pre-coated aluminum plate that has electroconductibility, anti-finger printing, anti-crackle and oilness concurrently is used more widely.
Patent documentation 1 has proposed the surface treatment aluminum sheet of following anti-finger printing and anti-crackle excellence, that is, the resin that contains lubricant by coating on aluminium sheet forms resin involucra, can not make surface attachment fingerprint, and the fine crack that produces of surface attract attention.
According to this invention, though improved the anti-finger printing and the anti-crackle of aluminium sheet to a certain degree, but the surface of aluminium sheet that is coated with the resin involucra of tape insulation thing is insulativity, therefore take out under the situation of ground connection at housing or structural member, need to be provided with the subsequent handling of conducting portion etc. that cuts the part of above-mentioned resin involucra and expose the metal part of aluminium sheet from above-mentioned electronics.
Therefore, for the problem of guaranteeing electroconductibility on the surface that solves this pre-coated aluminum plate, patent documentation 2 and patent documentation 3 etc. has proposed the technology that coating contains the resin involucra of conductive material.
But, to contain the resin-coated in the method for surface of aluminum plate of conductive material like this, the particle of conductive material is evenly dispersed in the above-mentioned resin, in being formed at the resin involucra of surface of aluminum plate, fully do not guarantee under the situation that the particle of conductive material contacts with each other, or do not guaranteeing fully on the interface of resin involucra and aluminium sheet that generation can not obtain the problem of desirable electroconductibility and so under the situation about contacting of conductive material and aluminium sheet.Therefore, in order to obtain desirable electroconductibility, need to increase the one-tenth component of conductive material.But, when increasing the one-tenth component of conductive material, produce following problem, that is, the resin involucra hardening becomes fragile, and when the aluminium sheet that is formed with resin involucra is implemented extrusion processing, the crackle (peeling off) of resin involucra takes place easily.
Present inventors are in order to solve the problem points that these conductive materials is added on the invention of the formation in the resin involucra, in patent documentation 4, be conceived to the relation of the average film thickness of surfaceness that aluminium sheet has and resin involucra, proposed not use conductive material just to guarantee the technology of electroconductibility.Promptly, this patent documentation 4 has been put down in writing following electronics with pre-coated aluminum plate 40, as shown in Figure 5, form the erosion resistance epithelium 42 of regulation and have the resin involucra 43 of regulation average film thickness in the one side at least of the aluminium blanket 41 of the center line average roughness Ra with regulation, the small concavo-convex protuberance that aluminium blanket 41 has is exposed to the surface of resin involucra 43, like this under the state that is coated by erosion resistance epithelium 42, also improve electroconductibility, and satisfied other requirements.
The electronics of patent documentation 4 record with above-mentioned formation, so is used in the various electronicss such as inner shell of the backplate of the framework of the cover of CD drive and liquid crystal panel, liquid crystal panel, vehicle audio system because electroconductibility, anti-finger printing, anti-crackle, oilness excellence with pre-coated aluminum plate.
Patent documentation 1: the special fair 6-70870 communique of Japan
Patent documentation 2: Japanese kokai publication hei 7-313930 communique
Patent documentation 3: No. 3245696 communique of Japanese Patent
Patent documentation 4: No. 4237975 communique of Japanese Patent
But, the erosion resistance epithelium that the electronics of patent documentation 4 record uses with pre-coated aluminum plate is with chromium (Cr) or zirconium (Zr) the known in the past erosion resistance epithelium as principal constituent, in patent documentation 4, put down in writing, when this erosion resistance epithelium is under the situation of principal constituent with Cr, can suitably use phosphoric acid chromate treating epithelium, dichromate (Network ロ system acid Network ロ メ one ト) to handle epithelium or application type chromate treating epithelium etc.
For example, the phosphoric acid chromate treating that forms phosphoric acid chromate treating epithelium is to make the reagent solution with 6 valency chromium and the processing of aluminium generation chemical reaction, in the process of reaction, 6 valency chromium are reduced into 3 valencys, therefore known have a following processing, that is, do not contain 6 valency chromium resulting changing in the epithelium (erosion resistance epithelium).In addition, the reaction solution that contains 6 valency chromium that reagent solution uses is to have carried out being considered to fully take into account the successful technology of environmental protection not because of containing so-called " closed system " design that its rinse water slave unit flows out waste water, waste.
But when on the position that stands in ordinary consumer, difference of correctly understanding 3 valency chromium and 6 valency chromium etc. is difficult to imagine that be subjected to the influence of " chromium " this words sometimes, self can reduce the image of goods.
In addition, in recent years, in electronic device field, viewpoint from environmental protection, reach by " the EU instruction of using about the restriction of the special harmful substance of electronics, electric installation (RoHS instruction) " " EU electric about giving up, electronic products instruct (WEEE instruction) " etc., the starting material that use are tending towards being restricted, and 6 valency chromium are so proper.
As mentioned above, phosphoric acid chromate treating epithelium does not contain 6 valency chromium, but contains 3 valency chromium.Use being made into goods and the depleted situation under, after discarded, be exposed under what kind of environment as for meeting, still can not manage.Therefore, under special environment, whether there being 3 valency chromium to become the query of the possibility of 6 valency chromium, be difficult to assert can reach 100% completely without.
Be deep into this level, in order from the security of 6 valency chromium, 100% to free, still nothing more than not using chromium to guarantee the performance of stipulating fully.
Summary of the invention
The present invention develops in view of above-mentioned problem, its purpose is, a kind of pre-coated aluminum plate of electronics of suitable environmental protection is provided, its electroconductibility, oilness, anti-finger printing and anti-crackle excellence, and, even do not form with the Plessy's green hydrochlorate be representative contain chromium base treatment epithelium, also possess excellent erosion resistance.
The electronics of the present invention that has solved above-mentioned problem is the one side at least of the aluminium blanket below the 0.5 μ m more than the 0.3 μ m at arithmetic average roughness Ra with pre-coated aluminum plate, do not establish the base treatment epithelium that contains chromium, but be formed with resin involucra, it is characterized by, described resin involucra is the containing metal element not, contain the acrylic resin composition, the urethane resin composition, silica composition and emboliform lubricated composition, the content that described silica composition accounts in the described resin involucra surpasses 12 quality %, the content of contained described lubricated composition surpasses 8 quality % in the described resin involucra, the average film thickness of described resin involucra is below the above 1.0 μ m of 0.15 μ m, with leading section be the spherical terminal of radius 10mm when pushing with respect to the described aluminium blanket that is formed with described resin involucra with the load of 0.4N described spherical terminal and the resistance value between the described aluminium blanket be below 10 Ω.
Electronics of the present invention with pre-coated aluminum plate owing to do not form the base treatment epithelium that contains chromium, and the arithmetic average roughness Ra of aluminium blanket and the average film thickness of resin involucra are limited in respectively in the specific scope, therefore the small protuberance of aluminium blanket becomes the form of protruding highlyer than the center line average of resin involucra, and the thickness of the resin involucra of covering protuberance and the thickness that is formed with the base treatment epithelium of prior art rest on roughly same degree.Therefore, can guarantee to utilize above-mentioned method to survey the electroconductibility that periodic resistance value is the following such excellence of 10 Ω.
In addition, electronics of the present invention passes through the resinous principle of regulation formation resin involucra as mentioned above with pre-coated aluminum plate, and the silica composition of regulation content is become to be divided into necessary composition with lubricating, guarantee to use and the erosion resistance of requirement, and guarantee oilness, anti-finger printing and anti-crackle as electronics.In addition, owing to do not contain the base treatment epithelium of chromium, and also do not contain in the resin involucra with the metallic element headed by the chromium, therefore can realize being fit to the pre-coated aluminum plate of electronics of environmental protection.
Electronics of the present invention is not preferably established the base treatment epithelium with pre-coated aluminum plate between described aluminium blanket and described resin involucra.
Like this, if adopt the formation that the base treatment epithelium that comprises the base treatment epithelium that does not contain chromium is not set between aluminium blanket and resin involucra, then can omit the operation and the base treatment epithelium that form the base treatment epithelium and form the medicament that uses, therefore can simplify widely and make the equipment formation of electronics of the present invention with pre-coated aluminum plate, can reduce cost, and realize also having improved the pre-coated aluminum plate of electric installation of productivity.
Electronics of the present invention is below the 2.5 μ m with the particle diameter of described lubricated composition contained in the preferred described resin involucra of pre-coated aluminum plate.
Like this, approach near the lower limit situation even be formed at electronics of the present invention with the thickness of the resin involucra of pre-coated aluminum plate, lubricated composition also is difficult to come off, and therefore can realize keeping high conductivity, and guarantee the pre-coated aluminum plate of electronics of higher oilness.
It is that the following optical characteristics of the above 15 μ m of 0.3 μ m is regulated particulates that electronics of the present invention preferably also contains the following median size of the above 30 quality % of 1 quality % with the described resin involucra of pre-coated aluminum plate.
Like this, can realize that the optical characteristics on surface is further optimized and has further improved the pre-coated aluminum plate of electronics of anti-finger printing.
Electronics of the present invention with the preferred described aluminium blanket of pre-coated aluminum plate contained contain quantity not sufficient 0.1 quality % as alloy with the chromium that adds element.
Like this, not only resin involucra and base treatment epithelium, aluminium sheet itself does not contain chromium yet, therefore can realize being more suitable for the pre-coated aluminum plate of electronics of environmental protection.
The pre-coated aluminum plate of electronics according to the present invention, with the average film thickness separate provision of the arithmetic average roughness Ra of aluminium blanket and resin involucra in specific scope, and further optimized the composition of resin involucra, so electroconductibility, oilness, anti-finger printing, anti-crackle and excellent corrosion resistance.
In addition, the pre-coated aluminum plate of electronics according to the present invention because resin involucra and base treatment epithelium do not contain chromium, therefore is fit to environmental protection.
Description of drawings
Fig. 1 schematically shows the major portion amplification profile of electronics of the present invention with the formation of pre-coated aluminum plate;
Fig. 2 schematically shows to measure the synoptic diagram of electronics with the method for the resistance value of pre-coated aluminum plate;
Fig. 3 schematically shows the major portion amplification profile of electronics of the present invention with the formation of another example of pre-coated aluminum plate;
Fig. 4 schematically shows to measure the synoptic diagram of electronics with the shear-bow test method(s) of the anti-crackle of pre-coated aluminum plate;
Fig. 5 schematically represents the major portion amplification profile of the electronics of conventional art with the formation of pre-coated aluminum plate.
Nomenclature
10, the pre-coated aluminum plate of 10 ' electronics
11 aluminium blankets
12 resin involucras
13 do not contain the base treatment epithelium of chromium
Embodiment
Below, with reference to accompanying drawing electronics of the present invention is elaborated with pre-coated aluminum plate.
As shown in Figure 1, electronics of the present invention have aluminium Bear-grudge plate 11 with pre-coated aluminum plate 10 and be formed at this aluminium blanket 11 at least the one side resin involucra 12.In addition, between this aluminium blanket 11 and resin involucra 12, do not form at least contain the such chromium of general commonly used Plessy's green hydrochlorate change into epithelium (base treatment epithelium).But, as shown in Figure 3,, then between aluminium blanket 11 and resin involucra 12, allow to form this base treatment epithelium if do not contain the base treatment epithelium of chromium.
Be formed at the resin involucra 12 containing metal element not on the surface of this aluminium blanket 11, contain the lubricated composition of acrylic resin composition, urethane resin composition, silica composition and particle shape, the content that silica composition accounts in this resin involucra 12 surpasses 12 quality %, and the content of the lubricated composition described in this resin involucra 12 surpasses 8 quality %.
In addition, be formed with small concavo-convexly on the surface of aluminium blanket 11, therefore above-mentioned resin involucra 12 forms thickly relatively about the concavo-convex recess on the surface of aluminium blanket 11, about protuberance, form relative thin, its average film thickness is below the above 1.0 μ m of 0.15 μ m.
Electronics of the present invention with pre-coated aluminum plate 10 owing to have this resin involucra 12, therefore can with the load of 0.4N with leading section be the spherical terminal 23 (with reference to Fig. 2) of radius 10mm when pushing with respect to the aluminium blanket 11 that is formed with resin involucra 12 above-mentioned spherical terminal 23 and the resistance value between the aluminium blanket 11 make below 10 Ω.
In addition, if above-mentioned electronics of the present invention is compared with the electronics of the formation of pre-coated aluminum plate 10 and conventional art shown in Figure 5 formation with pre-coated aluminum plate 40 with the relevant record of pre-coated aluminum plate 10 and electronics of the present invention shown in Figure 1, promptly as can be known, the electronics of the present invention electronics of bearing conventional art with the resin involucra 12 of pre-coated aluminum plate 10 with pre-coated aluminum plate 40 with erosion resistance epithelium 42 and resin involucra 43 integrated formation that forms and effects.Thereby the back is elaborated, and as shown in Figure 3, might as well establish the base treatment epithelium 13 that does not contain chromium.
Below, electronics of the present invention each constitutive requirements with pre-coated aluminum plate 10 are described.
[aluminium blanket]
The operable aluminium blanket of the present invention 11 is made of aluminum or aluminum alloy, and operable kind is not done special restriction yet, and desired intensity etc. in the time of can be based on article shape and manufacturing process, use is selected arbitrarily.Usually, can preferably use the aluminium sheet of non-thermal treatment type, promptly the 1000 industrial pure plates, 3000 that the are Al-Mn that is is that the Al-Mg that alloy sheets, 5000 is is an alloy sheets.Particularly, follow the attenuate pull and stretch and under the situation of the housing of the dark container shapes of coming, recommend A1050, A1100, the aluminium sheets such as A3003, A3004 of JISH4000 regulation in making.In addition, in the situation of the housing of making superficial container shapes, and making under the situation of housing of bending machining main body, recommend the aluminium sheets such as A5052, A5182 of JISH4000 regulation.About modifier treatment, thickness of slab, also can use according to the selected all plates of purpose.
In addition, aluminium blanket 11 does not preferably contain chromium, but is containing under the situation of chromium, preferably its content is made as less than 0.1 quality %.Gui Ding reason is not because the problem on the performance like this, but because stand in and stipulate on the following position,, for making the goods that are more suitable for environmental protection, except that the chromium component of sneaking into inevitably by secondary aluminium alloy etc., does not add chromium energetically that is.In addition, when not allowing to contain the chromium of this degree, not only diminish excellent recirculation, and cause to use new aluminum alloy at every turn, therefore need a lot of energy and resource, become the goods that are not suitable for environmental protection on the contrary as the advantage of aluminium alloy.
When standing on this viewpoint, A5052 is decided to be 0.15～0.35 quality % with the chromium content in the alloy in the above-mentioned aluminium alloy, as alloying constituent, is equivalent to add energetically the alloy of chromium.The use of this alloy is not preferred as the present invention, therefore, if possible, the preferred replacement alloy that uses with similar performance.For example, the aluminium blanket can adopt following 5K52 (Kobe Steel Ltd's system), and this 5K52 is, as the replacement alloy of A5052, contain the magnesium with 2.5 quality % degree of A5052 peer-level, do not contain chromium energetically, replace chromium, and be added with the manganese of 0.45 quality % degree.
(the above 0.5 μ m of the arithmetic average roughness Ra:0.3 μ m of aluminium blanket is following)
The arithmetic average roughness Ra of aluminium blanket 11 and the average film thickness of resin involucra described later 12 all are to help to show the important parameter of electronics of the present invention with various characteristicses such as the electroconductibility of pre-coated aluminum plate 10, erosion resistance, anti-finger printing, anti-crackles.
When the arithmetic average roughness Ra of aluminium blanket 11 less than 0.3 μ m, electronics is excessive with the smooth finish on the surface of pre-coated aluminum plate 10, and the small crackle that the fingerprint of surface attachment and surface produce relatively attracts attention anti-finger printing and anti-crackle variation.In addition, in this case, have the height step-down of protuberance of the quality of above-mentioned small concavo-convex aluminium blanket 11, consequently, cover the thickness thickening of the resin involucra 12 of protuberance, therefore be difficult to guarantee desirable electroconductibility.
On the other hand, when the arithmetic average roughness Ra of aluminium blanket 11 surpasses 0.5 μ m, the excessive height of the protuberance of aluminium blanket 11, the end face of protuberance easily exposes from resin involucra 12.Consequently, the surface of the aluminium blanket 11 that exposes is worn by mould, anti-crackle reduction, and oilness also reduces.In addition, when protuberance when resin involucra 12 exposes, will corrode with this as the starting point, and expansion towards periphery, erosion resistance reduces.
That is, be defined as the scope below the 0.5 μ m more than the 0.3 μ m, can possess excellent electroconductibility, anti-finger printing, anti-crackle and erosion resistance by arithmetic average roughness Ra with aluminium blanket 11.
In addition, be adjusted to method in the above-mentioned scope as arithmetic average roughness Ra with aluminium blanket 11, for example enumerate, the method for final (precision work) calendering that in the calendering procedure of aluminium blanket 11, utilizes the stack suitably set surfaceness to cold pressing to prolong, and under suitable condition to the surface of the aluminium blanket 11 after the calendering implement etch processes method, spray the gunite of particulate etc. etc.
In the present invention, owing to form and formed on the small concavo-convex aluminium blanket 11 composition specific and the resin involucra 12 of average film thickness regulating like this arithmetic average roughness Ra, therefore the thickness of the resin involucra 12 of the small protuberance of aluminium coating blanket 11 can be not blocked up, again can be not thin excessively.Therefore, desirable electroconductibility, oilness, anti-finger printing and anti-crackle can be guaranteed, and the high electronics of erosion resistance can be obtained with pre-coated aluminum plate 10.
In addition, if do not contain the base treatment epithelium of chromium, then between aluminium blanket 11 and resin involucra 12, allow to form this base treatment epithelium, but under the situation that does not form the base treatment epithelium, can omit the operation that forms the base treatment epithelium and be used for the medicament that the base treatment epithelium forms, therefore can simplify significantly and make the equipment formation of electronics of the present invention, can reduce cost, and boost productivity with pre-coated aluminum plate 10.
[resin involucra]
(constituent of resin involucra: comprise acrylic resin composition, urethane resin composition, silica composition and emboliform lubricated composition)
As mentioned above, the resin involucra 12 that electronics of the present invention uses with pre-coated aluminum plate 10 need comprise acrylic resin composition, urethane resin composition, silica composition and emboliform lubricated composition as constituent.
As resinous principle, by also using acrylic resin composition and urethane resin composition, not only can cover the recess on surface with thin film with small concavo-convex aluminium blanket 11, and can cover protuberance, therefore can obtain erosion resistance, anti-crackle, pre-coated aluminum plate 10 that anti-finger printing is good.
At this, only acrylic resin composition in the resinous principle and urethane resin composition contain ratio, by quality ratio, the preferred acrylic resins composition: the urethane resin composition is 5: 95～95: 5, more preferably 10: 90～90: 10, more preferably 50: 50～85: 15.When comparing the acrylic resin composition for a long time with 95: 5, the erosion resistance variation.In addition, when comparing the urethane resin composition for a long time with 5: 95, erosion resistance and anti-crackle be variation together.
By silica composition, lubricated composition all have been dispersed in and have used in the resinous principle of acrylic resin composition and urethane resin composition, as mentioned above, recess with surface of small concavo-convex aluminium blanket 11 all is capped than unfertile land certainly, protuberance also can all be capped than unfertile land, therefore compare with the resin involucra that uses other resinous principles, can improve erosion resistance and oilness efficiently.Particularly, the effect that erosion resistance improves is strengthened greatly, therefore for example, do not use in the past electronics with bearing the base treatment epitheliums 42 such as phosphoric acid chromate treating epithelium that erosion resistance is given in the pre-coated aluminum plate 40 (with reference to Fig. 5), even thin as the present invention thickness (average film thickness) also can be guaranteed high corrosion resistance.
(composition of resin involucra: not containing metal element)
The present invention is purpose so that the electronics that is fit to environmental protection to be provided with pre-coated aluminum plate 10, therefore do not establish the base treatment epithelium that contains chromium, in resin involucra 12, do not contain chromium, do not contain other metallic elements yet, can provide the electronics that further is fit to environmental protection with pre-coated aluminum plate 10 thus.For example, as being the rust-stabilising pigment (rust-stabilising pigment) that purpose is added to improve erosion resistance mostly, having lead is that rust-stabilising pigment, zinc are that rust-stabilising pigment, phosphoric acid are rust-stabilising pigment.As lead is rust-stabilising pigment, has red lead, lead suboxide, basic lead chromate, lead cyanamide, calcium plumbite, sublimed lead etc., contains Pb, Cr, Ca.At zinc is to contain Zn in the rust-stabilising pigment, is rust-stabilising pigment as phosphoric acid, has zinc phosphate, trimagnesium phosphate, sodium polyphosphate, calcium zinc orthophosphate activated by thallium, aluminium triphosphate, phospho-molybdic acid aluminium etc., contains Zn, Mg, Na, K, Al, Mo.In addition, as the painted series pigments that adds to be colored as purpose mostly, have titanium oxide, Zinc oxide pigment, iron oxide pigment of white pigment etc., in these pigment, contain Ti, Zn, Fe, in filler pigment, have lime carbonate, barium sulfate, aluminum oxide, kaolin, talcum, wilkinite, mica etc., contain Ca, Ba, Al, Mg, Na.In addition,, have nickel powder, aluminium powder, Stainless Steel Powder, zinc powder, other cadmium yellows, cobalt violet, molybdate orange etc., in this electrically conducting coating, contain Ni, Al, Fe, Zn, Cd, Co, Mo as electrically conducting coating.
Therefore, resin involucra 12 does not add the rust-stabilising pigment that contains these metallic elements, painted series pigments, electrically conducting coating, but, as described later, even resin involucra 12 does not contain these pigment and coating,, also can bring into play sufficient performance about erosion resistance and electroconductibility, therefore do not contain these pigment and coating, without any problem.
(silica composition accounts for the content in the resin involucra: surpass 12 quality %)
Silica composition improves erosion resistance widely.Therefore, contain this silicon-dioxide by overshoot, electronics can possess the only erosion resistance of acrylic resin composition and the unavailable degree of urethane resin composition with pre-coated aluminum plate 10 a certain amount ofly.
When the content of silica composition is 12 quality % when following, erosion resistance descends.Therefore, compare erosion resistance decline with the electronics in the past that uses phosphoric acid chromate treating epithelium etc. to contain the base treatment epithelium (erosion resistance epithelium 42 (with reference to Fig. 5)) of chromium with pre-coated aluminum plate 40 (Fig. 5 with reference to).In addition, the content of silica composition is preferably more than the 15 quality %.
In addition, during the resin flow when considering application etc., the content of silica composition preferably is made as below the 50 quality %.
(lubricated composition accounts for the content in the resin involucra: surpass 8 quality %)
Lubricated composition is born the effect that improves oilness and improve plasticity as its name.
When the content of lubricated composition is 8 quality % when following, can not get sufficient oilness, therefore, when implementing extrusion processing continuously, the generating capacity that becomes abrasion powder increases, and the reason of the unfavorable condition of peeling off of resin involucra and so on easily takes place.Therefore, the content of lubricated composition need surpass 8 quality %.In addition, the content of lubricated composition preferably is made as more than the 12 quality %.
In addition, when the content that lubricates composition is big, thereby have the tendency of the anti-crackle decline of film-forming properties decline of resin involucra, the content of therefore lubricated composition preferably is made as below the 30 quality %.
(the preferred particle diameter of lubricated composition: 2.5 μ m are following)
As mentioned above, lubricated composition is the particle shape.Its particle diameter is preferably below the 2.5 μ m.When the particle diameter of lubricated composition surpassed 2.5 μ m, under near the situation the average film thickness that the present invention stipulates is lower limit, lubricated composition easily came off from resin involucra.The particle diameter of the lubricated composition that the present invention uses is more preferably below the 0.6 μ m.In order effectively to bring into play the effect that improves oilness and improve plasticity, the particle diameter of lubricated composition preferably is made as more than the 0.1 μ m.
As lubricated composition, from the raising of moderately harmony plasticity and the viewpoint of economy, for example, can use and be selected from polyethylene wax, poly-alkylene is that wax, Microcrystalline Wax, fluorine are at least a in wax, lanolin wax, carnauba wax, paraffin, the graphite.
(preferred composition: optical characteristics is regulated particulate)
Electronics of the present invention with pre-coated aluminum plate 10 in, preferably add optical characteristics and regulate particulate.In the present invention, owing to contain silica composition and lubricate and become to grade particulate, therefore just had excellent anti-finger printing originally, regulate particulate by adding optical characteristics, thereby can realize further optimizing the optical characteristics on surface, the electronics that further improved anti-finger printing is with pre-coated aluminum plate 10.
Regulate particulate as this optical characteristics, for example, can use various organic system particulates such as the particulate of the particulate that is selected from acrylic resin, nylon resin system, the particulate of urethane resin system, the particulate of polyolefin resin system, the particulate of fluoro-resin system and glass granules etc. inorganic is at least a in the particulate.
(optical characteristics is regulated the preferred particle diameter of particulate: the above 15 μ m of 0.3 μ m are following)
Under the situation of adding optical characteristics adjusting particulate, the particle diameter that optical characteristics is regulated particulate preferably is made as below the above 15 μ m of 0.3 μ m.When optical characteristics is regulated the particle diameter less than 0.3 μ m of particulate, almost can not get improving the effect of optical characteristics, it is nonsensical therefore to add this particle.On the other hand, when the particle diameter of optical characteristics adjusting particulate surpassed 15 μ m, this particulate easily came off from resin involucra 12.As fluoro-resin pearl and polyolefin-based resins pearl, chemically reactive is low more, easily more comes off from resin involucra 12, and therefore, particle diameter further preferably is made as below the 5 μ m.In addition, when the average film thickness of imaginary the present invention regulation is near the lower limit time, particle diameter further preferably is made as below the 2.5 μ m.
(optical characteristics is regulated the preferred one-tenth component of particulate: the above 30 quality % of 1 quality % are following)
In addition, under the situation of adding optical characteristics adjusting particulate, the one-tenth component that optical characteristics is regulated particulate preferably is made as below the above 30 quality % of 1 quality %.When the one-tenth of optical characteristics adjusting particulate is given short measure 1 quality %, almost can not get improving the effect of optical characteristics, it is just nonsensical therefore to add this particle.On the other hand, when the one-tenth component of optical characteristics adjusting particulate surpassed 30 quality %, the quantity of this particulate in the resin involucra 12 will be too much, therefore, in the time will guaranteeing electroconductibility, a large amount of particulates enters between electrode and the aluminium blanket 11, it is approaching to hinder both, and electroconductibility descends.Therefore, the one-tenth component of optical characteristics adjusting particulate further preferably is made as below the 10 quality %.
(average film thickness of resin involucra: the above 1.0 μ m of 0.15 μ m are following)
The resin involucra 12 that is formed on the aluminium blanket 11 is established for giving desirable oilness, erosion resistance, anti-finger printing and anti-crackle to electronics of the present invention with pre-coated aluminum plate 10.In the present invention, be defined in more than the 0.15 μ m below the 1.0 μ m in this specific scope, realize oilness, erosion resistance, anti-finger printing and anti-crackle, and realize desirable electroconductibility by average film thickness with resin involucra 12.
When the average film thickness less than 0.15 μ m of resin involucra 12, therefore the protuberance of aluminium coating blanket 11 might can not obtain sufficient erosion resistance fully.In addition, be formed at the also attenuation of thickness of resin involucra 12 of the recess of aluminium blanket 11, and silica composition and lubricated composition reduce also, so anti-finger printing, anti-crackle variation, oilness is also insufficient, therefore is difficult to form processing.
On the other hand, when the average film thickness of resin involucra 12 surpasses 1.0 μ m, even the surfaceness of aluminium blanket 11 (arithmetic average roughness Ra) becomes big near the mode that becomes the set upper limit of the present invention, because the thickness of the resin involucra 12 of the protuberance of aluminium coating blanket 11 also can be blocked up, therefore be difficult to guarantee desirable electroconductibility.
(the formation method of resin involucra)
This resin involucra 12 can be by as shown in the formula forming, for example, utilize rolling method, the liquid epithelium that will contain the resinous principle of the present invention's regulation forms with medicament, coat the one or both sides of the aluminium blanket 11 of web-like continuously, afterwards, pass that one or more baking ovens connect together and toast in the continous way baking oven that forms.Like this, just can be continuously and promptly make electronics with pre-coated aluminum plate 10, so the productivity height.
In addition, at this moment, resin involucra 12 is because to be coated on the lip-deep initial stage of aluminium blanket 11 be liquid, and therefore than the protuberance on the surface of unfertile land metallized aluminum blanket 11, on the other hand, preferential filling coats recess in recess than heavy back.Then, by the baking processing of next carrying out, form hard resin epithelium 12 with thin thickness on protuberance, form hard resin epithelium 12 at recess with thicker thickness, the result can have the average film thickness of the present invention's regulation.
In addition, the area and the amount of resin thereof of the part that the average film thickness of resin involucra 12 can be by being formed with this resin involucra 12, and obtain with comparalive ease.
[electronics with the performance of pre-coated aluminum plate]
(resistance value: 10 Ω are following)
Electronics of the present invention with pre-coated aluminum plate 10 in, need and will be made as below 10 Ω with the resistance value that method is as described later measured.If this resistance value is made as below 10 Ω, then can take from electronics with direct ground connection on the resin involucra 12 of pre-coated aluminum plate 10.In addition, can remove electromagnetic wave noise fully.Therefore, in being the structural member that is called housing and base of drive unit such as CD drive and this drive unit, uses under the situation of electronics of the present invention with pre-coated aluminum plate 10 by electronics, be difficult to bring out and write or playback error, at electronics is to use under the situation of electronics of the present invention with pre-coated aluminum plate 10 in the fixing structural member with framework and back side cover of being called of liquid crystal panel and this liquid crystal panel, is difficult to take place image noise.
Relative therewith, when resistance value surpasses 10 Ω, can not take from the resin involucra 12 directly ground connection, can not fully remove electromagnetic wave noise.
In the present invention, be located at by arithmetic average roughness Ra in the specified range (the above 0.5 μ m of 0.3 μ m is following) of the present invention's regulation aluminium blanket 11, and the average film thickness of resin involucra 12 is located in the specified range (the above 1.0 μ m of 0.15 μ m are following) of the present invention's regulation, the resistance value of measuring with specific method becomes below 10 Ω.Promptly, electronics of the present invention with pre-coated aluminum plate 10 in, by with suitable homogeneity the aluminium blanket 11 of arithmetic average roughness Ra with specified range being formed resin involucras 12, the small protuberance of aluminium blanket 11 becomes the form of protruding highlyer than the center line average of resin involucra 12.Like this, at the protuberance that protrudes highlyer than the center line average of resin involucra 12, the application base treatment epithelium of the thickness of resin involucra 12 and conventional art (erosion resistance epithelium 42 (with reference to Fig. 5)) rests on roughly with the thickness of degree, and can make resistance value is below 10 Ω, can guarantee electroconductibility.
But, the arithmetic average roughness Ra of aluminium blanket 11 is defined in the specified range (the above 0.5 μ m of 0.3 μ m is following) and the average film thickness of resin involucra 12 is defined in specified range (the above 1.0 μ m of 0.05 μ m are following) even in be used for satisfying that to make resistance value be the prerequisite of the following condition of 10 Ω, neither sufficient condition, even satisfy these conditions sometimes, resistance value does not reach below 10 Ω yet.For example, near the arithmetic average roughness Ra of aluminium blanket 11 is lower limit and the average film thickness of resin involucra 12 be under near the upper limit the situation, aluminium blanket 11 concavo-convex little, and thickness is thick, therefore easily becomes like that.
Therefore, in the present invention, the resistance value that will measure with specific method described later is to be made as prerequisite below 10 Ω.
As concrete example, the comparative example C3 of TOHKEMY 2004-68042 communique has put down in writing and used surfaceness is the aluminium alloy plate of 0.4 μ m, and is coated with the example of the coating of 0.62 μ m.
Wherein, the surface roughness Ra of aluminium blanket 11, the glue spread of filming (average film thickness) all satisfy prerequisite of the present invention, but resistance value is 23 Ω, the important document of discontented unabridged version invention.Also need consider the influence that measuring method is different, but in this comparative example C3, disclose following result, that is, the load when measuring resistance value is 100g, with than the application's
Stronger power makes electrode contact with test film, therefore, if according to measuring method, then should be measured to the lower resistance value of method than the present invention's regulation, but have to the high resistance of discontented unabridged version invention important document.
By this example as can be known, the average film thickness that the arithmetic average roughness Ra of aluminium blanket 11 is defined in scope interior (the above 0.5 μ m of 0.3 μ m is following) and resin involucra 12 is defined in scope interior (below the above 1.0 μ m of 0.15 μ m) even be used for satisfying the prerequisite that the resistance value of measuring with ad hoc approach described later is a this important document below 10 Ω, neither sufficient condition, therefore in the present invention, only can confirm to satisfy that to survey periodic resistance value by ad hoc approach described later be that the situation of this important document below 10 Ω is regarded the present invention as.
Fig. 2 schematically shows to measure the figure of electronics of the present invention with the method for the resistance value of pre-coated aluminum plate.This measuring method and patent documentation 4, and disclosed methods such as TOHKEMY 2005-297290 communique, TOHKEMY 2002-206178 communique be the assay method of same mode, identical conditions.
The measuring method of resistance value of the present invention is measured with following some ways of contact of carrying out, promptly, one terminal 21 of tester 20 is contacted with the direct conducting of aluminium blanket of exposing with a part of resin involucra of pre-coated aluminum plate with sand paper grinding electronics, the another terminal 22 that makes tester 20 is via forming the spherical terminal 23 of brass system that leading section is the roughly ball shape of radius 10mm, from the resin involucra of electronics with pre-coated aluminum plate, with
Load, and measure the position and contact.In addition, about the terminal 21 of tester 20 (terminal opposite), owing to must directly contact, so directly contact with part that resin involucra has been removed in grindings such as utilizing sand paper with the aluminium blanket of electronics with pre-coated aluminum plate with spherical terminal 23.In addition, the natural oxide film that is positioned at the surface of terminal 21 and spherical terminal 23 also becomes the reason that the measured value that makes resistance value has deviation, therefore before the mensuration of resistance value, natural oxide film is removed on preferred surface of grinding terminal 21 and spherical terminal 23 earlier with sand paper etc. fully.In addition, survey the influence of the internal resistance of periodic tester 20 in order to get rid of resistance value, before the mensuration of carrying out this resistance value, preferably under the leading section state of contact of leading section that makes terminal 21 and spherical terminal 23, carrying out zero point revises, use the most responsive zone of tester 20 then, the value after the demonstration of tester 20 is stablized is made as measured value.And, in order fully to guarantee the reliability of resistance value,, carry out the mensuration of 10 these resistance values of place at least in position at random preferably to a pre-coated aluminum plate of electronics, if possible, measure 50 places, adopt the resistance value of its mean value as the present invention's regulation.
[base treatment epithelium]
The effect that is formed at the base treatment epithelium of common pre-coated aluminum plate is, improves the adaptation of resin involucra and aluminium blanket, improves erosion resistance simultaneously.For this purpose, as a rule, use the inorganic independent epithelium or the inorganic organic composite film that contain Cr or Zr.Especially, as the base treatment epithelium, use the phosphoric acid chromate treating epithelium of 3 valency chromium system mostly.But as mentioned above, resin involucra 12 of the present invention has the effect of performance base treatment epithelium concurrently, therefore needn't establish the base treatment epithelium.Electronics that a kind of suitable environmental protection is provided is disclosed in one of purpose of the present invention with pre-coated aluminum plate 10, therefore, can not allow to establish the base treatment epithelium that contains chromium of known in the past phosphoric acid chromate treating epithelium, dichromate processing epithelium, application type chromate treating epithelium and so on especially.Therefore, for the further raising of the adaptation that realizes resin involucra 12 and aluminium blanket 11 and the raising of erosion resistance, under the situation that forms the base treatment epithelium,, then can allow to form it if do not contain the base treatment epithelium of chromium.
Under the situation that forms the base treatment epithelium do not contain chromium, electronics of the present invention is with pre-coated aluminum plate 10 ' for example, become formation as shown in Figure 3.
As shown in Figure 3, electronics with pre-coated aluminum plate 10 ' have aluminium blanket 11, be formed at the one side at least of this aluminium blanket 11 resin involucra 12, be formed at the base treatment epithelium 13 that does not contain chromium between aluminium blanket 11 and the resin involucra 12.
As this base treatment epithelium 13, for example can enumerate: zirconium phosphate (PZr) is handled epithelium, titanium phosphate (PTi) is handled epithelium etc.Certainly, do not contain chromium environmental protection load substances in addition in this base treatment epithelium 13, for example, the material that restriction such as RoHS, WEEE is used is self-evident.
More than Shuo Ming electronics of the present invention also can as described belowly be understood with pre-coated aluminum plate 10.
Electronics of the present invention is to be the pre-coated aluminum plate of electronics that at least simultaneously is formed with resin involucra 12 of the aluminium blanket 11 below the 0.5 μ m more than the 0.3 μ m at center line average roughness Ra with pre-coated aluminum plate 10, between aluminium blanket 11 and resin involucra 12, do not form base treatment epithelium (the quite erosion resistance epithelium 42 of Fig. 5), resin involucra 12 is the containing metal element not, contain the acrylic resin composition, the urethane resin composition, silica composition and emboliform lubricated composition, the content that silica composition accounts in the resin involucra 12 surpasses 12 quality %, the content of contained lubricated composition surpasses 8 quality % in the resin involucra 12, the average film thickness of resin involucra 12 is below the above 1.0 μ m of 0.15 μ m, is that the spherical terminal 23 (with reference to Fig. 2) of radius 10mm spherical terminal 23 and the resistance value between the aluminium blanket 11 when pushing with respect to the aluminium blanket 11 that is formed with resin involucra 12 with the load of 0.4N is (with reference to Fig. 1) below 10 Ω with leading section.
In addition, also can between aluminium blanket 11 and resin involucra 12, establish the base treatment epithelium 13 (with reference to Fig. 4) that does not contain chromium.
With pre-coated aluminum plate 10, can be achieved as follows effect according to the electronics of the present invention of above explanation.
(1) electronics according to the present invention is with pre-coated aluminum plate 10, and the arithmetic average roughness Ra of aluminium blanket 11 and the average film thickness of resin involucra 12 are defined in specific scope, and has stipulated resinous principle, the content of silica composition and the content of lubricated composition.Thus, protuberance with small concavo-convex aluminium blanket 11 becomes the form of protruding highlyer than the center line average of resin involucra 12, the thickness that covers the resin involucra 12 of this protuberance roughly is same degree with the application base treatment epithelium (erosion resistance epithelium 42 (with reference to Fig. 5)) of conventional art, electroconductibility, anti-finger printing and anti-crackle and conventional art can be maintained same degree.Particularly, be defined as specific composition,, also can guarantee excellent erosion resistance even do not form the base treatment epithelium (erosion resistance epithelium 42 (with reference to Fig. 5)) that contains chromium by resinous principle with resin involucra 12.In addition, owing to do not form the base treatment epithelium that contains chromium, therefore electronics of the present invention is more suitable for environmental protection than the electronics of conventional art with pre-coated aluminum plate with pre-coated aluminum plate 10.
(2) electronics according to the present invention is with pre-coated aluminum plate 10, between aluminium blanket 11 and resin involucra 12, the base treatment epithelium that contains chromium certainly much less, comprise the base treatment epithelium that does not contain chromium, do not establish the base treatment epithelium, therefore can omit the operation and the base treatment epithelium that form the base treatment epithelium and form the medicament that uses, therefore can simplify widely and make the equipment formation of electronics of the present invention with pre-coated aluminum plate 10, can reduce cost, and also can boost productivity.
(3) electronics according to the present invention is with pre-coated aluminum plate 10, because constituting the particle diameter of lubricated composition contained in the resin involucra 12 is below the 2.5 μ m, therefore, even the thickness of resin involucra 12 is near the above-mentioned interior situation of lower limit of scope, also can be difficult to make lubricated composition to come off, therefore higher electroconductibility can be kept, and higher oilness can be guaranteed.
(4) electronics according to the present invention is with pre-coated aluminum plate 10, it is that the following optical characteristics of the above 15 μ m of 0.3 μ m is regulated particulate that resin involucra 12 contains the following median size of the above 30 quality % of 1 quality %, therefore the optical characteristics on surface can be further optimized, anti-finger printing can be further improved.
(5) electronics according to the present invention is with pre-coated aluminum plate 10, and on the aluminium blanket 11 that pre-coated aluminum plate uses, what aluminium blanket 11 was contained contains quantity not sufficient 0.1 quality % as alloy with the chromium that adds element, so can further be fit to environmental protection.
The housing and the structural member of the fixing various electronicss with framework and back side cover and so on that electronics of the present invention can be preferred for the housing of disc drives apparatus and base, liquid crystal panel with pre-coated aluminum plate 10.
In addition, electronics of the present invention has excellent oilness with pre-coated aluminum plate 10, therefore has excellent formability, and making electronics with in the operation of molding, can reduce the bad incidence of quality of extrusion molding, can improve the effective rate of utilization of goods.Thus, the present invention can reduce the whole cost of electronics with molding, consequently, helps the cost of electronics goods to reduce greatly.
(embodiment)
Then, compare, electronics of the present invention is described more specifically with pre-coated aluminum plate satisfying the embodiment of important document of the present invention regulation and the comparative example that does not satisfy important document.
The pre-coated aluminum plate of making embodiment 1～23 as described below and comparative example 1～14.
At first, will have the aluminium alloy fusion of the composition of the A5182 that stipulates among the JISH4000, regulate after the alloying constituent,, be made into the slab of calendering usefulness by casting.Segregation layer to steel slab surface carries out surfacing, after the operation of handling through homogenizing, through hot calender, cold pressing and prolong and each operation such as thermal treatment, is made into aluminium blanket (thickness of slab: 0.5mm, alloy species: A5182-H34).In addition, in above-mentioned final (precision work) operation of prolonging of colding pressing,, manufacture the aluminium blanket shown in table 1 and the table 2 with various surfacenesses (arithmetic average roughness) by the surfaceness of suitable change stack.
Use commercially available aluminium with weakly alkaline degreasing fluid the aluminium blanket that manufacture carried out degreasing, as Coating Pretreatment thereafter.Next, shown in table 1 and table 2, as the application substrate, in embodiment 4, carried out the base treatment of use zirconium phosphate (PZr), in embodiment 5, carried out the base treatment of use titanium phosphate (PTi), in comparative example 3,4, carried out the base treatment of use Plessy's green hydrochlorate (PCr), about embodiment 1～3,6～23, comparative example 1,2,5～14, usually, do not carry out the base treatment of the Plessy's green hydrochlorate that uses as the application substrate of pre-coated aluminum plate etc.In addition, comparative example 4 is suitable product of embodiment of patent documentation 4 (No. 4237975 communique of Japanese Patent).
Next, pass through rolling method, surface coated to these aluminium blankets has the resinous principle shown in table 1 and the table 2, the content of silica composition (quality %), the content (quality %) of lubricated composition, the particle diameter (μ m) of lubricated composition, optical characteristics is regulated the kind of particulate, optical characteristics is regulated the particle diameter (μ m) of particulate, the epithelium that optical characteristics is regulated particulate loading (quality %) forms medication, under 230 ℃ of Heating temperatures, carry out the baking in 30 seconds, form resin involucra thus with the average film thickness shown in table 1 and the table 2 (μ m), as the electronics of embodiment 1～23 and comparative example 1～14 with pre-coated aluminum plate (below, record and narrate simply and be " embodiment 1 ", " comparative example 1 " etc.).
[table 1]
*1) kind of base treatment epithelium: PZr=zirconium phosphate, PTi=titanium phosphate
*2) kind of the resinous principle of resin involucra: A=acrylic resin, U=urethane resin
*3) optical characteristics is regulated the kind of composition: A=acrylic resin particle, P=polyvinyl resin particulate (polyolefin), G=glass granules
[table 2]
*1) kind of base treatment epithelium: PCr=Plessy's green hydrochlorate
*2) kind of the resinous principle of resin involucra: A=acrylic resin, U=urethane resin, P=vibrin, E=Resins, epoxy
As the lubricated composition of embodiment 1～23 and comparative example 1～14, use polyethylene wax.
In addition, in the resinous principle of table 1 and table 2, A represents that acrylic resin, U represent that urethane resin, P represent vibrin, E representative ring epoxy resins, the numeric representation composition ratio shown in parantheses is interior.
In addition, the optical characteristics of table 1 is regulated in the kind of particle, and A represents the acrylic resin particulate, and P represents polyvinyl resin particulate (polyolefin), and G represents glass granules.
In addition, the surfaceness of aluminium blanket (arithmetic average roughness Ra) is by using surface roughness measurement machine (little slope institute (Kosaka Laboratory Ltd.) corporate system, surface roughness tester (SURFCORDER) SE-30D), along scanning with the rectangular direction of the rolling direction of aluminium blanket, and obtain arithmetic average roughness Ra (JIS B0601), thereby measure.
In addition, about embodiment 1～23 and the comparative example of making 1～14, to electroconductibility (resistance value (Ω)), oilness (frictional coefficient), anti-finger printing (aberration Δ E)), anti-crackle, erosion resistance (evaluation value (RT No.)) estimate.As described below, these performances are carried out evaluation of measuring.
＜electroconductibility 〉
Electroconductibility is measured in the following way, promptly, as tester 20, use LCR tester (HEWLETT PACKARD corporate system 4263B), as shown in Figure 2, one terminal 21 of tester 20 is contacted with the direct conducting of aluminium blanket of exposing with the resin involucra of the part of pre-coated aluminum plate with sand paper grinding electronics, the another terminal 22 that makes tester 20 is via spherical terminal 23 (this spherical terminal 23 is that leading section forms the brazen mensuration rod that radius is the roughly ball shape of 10mm), from the resin involucra of electronics with pre-coated aluminum plate, with
Load, and measure the position and contact energising.In addition, when measuring, grind the surface of terminal 21 and spherical terminal 23 earlier with sand paper, under the leading section state of contact of leading section that makes terminal 21 and spherical terminal 23, carry out zero point and revise.The limit is with shift in position 50 places of spherical terminal 23, and this mensuration is carried out on the limit, calculates mean value, with the mean value of resistance value be below 10 Ω be made as qualified, when surpassing 10 Ω, for defective.
＜oilness 〉
Black stool this (Bowden Leben) method (steel ball of heap of stone is clung in the oilness utilization
3/16ths inches (4.7625mm), load 2N (200gf), sliding velocity 200mm/min), on the surface of each electronics, measure rubbing of three selected at random places and wipe the Department number with pre-coated aluminum plate, calculate its mean value.
If the mean value of Mo Ca Department number is below 0.2, then in the shaping carried out usually with various electronicss processing, do not have special problem, if be below 0.1, then can be evaluated as well especially, it is qualified that these are made as, will above 0.2 be made as defective.
＜anti-finger printing 〉
Anti-finger printing uses the spectrophotometric color measurement instrument (CM-600d) of Konica Minolta corporate system by touch the surface of embodiment 1～23 and comparative example 1～14 with hand, measures the aberration (Δ E) of the front and back of adhering to fingerprint.
If aberration Δ E value is below 0.5, the fingerprint that then with the naked eye almost can not the confirmation form face adheres to, it is qualified therefore to be made as, and when surpassing 0.5, with the naked eye can confirm the fingerprint of surface attachment, therefore is made as defective.
＜anti-crackle 〉
Anti-crackle is estimated by the shear-bow test method(s).That is, as shown in Figure 4, utilize patrix 31 and counterdie 32, the test film of clamping embodiment 1～23 and comparative example 1～14, drift 33 slides on the face that is formed with resin involucra of test film, carries out bending machining, thus the reproduction that adds the processing crackle that takes place man-hour in the shaping of pushing is tested.The thickness of slab that the interval (mode spacing) that produces between counterdie 32 and the drift 33 is made as the test film of use adds 10% gap and the interval that obtains.
The slipping plane of the test film of bending machining has been carried out in visual observation, and by the degree of bending machining crackle with respect to each test film, additional counting of 0 point (bad)～5 point (excellent) and quantizing carried out the evaluation of anti-crackle.Carry out five identical experiments, with its mean value for additional have more than 2 count be made as qualified, being made as of 2 of mean value less thaies is defective.
＜erosion resistance 〉
Erosion resistance is tested based on the neutral brine spray testing of JISZ2271 regulation, and estimates.That is, as the spraying fluid of spraying, use the sodium chloride aqueous solution of 5 quality % on the tension test sample, the spraying envrionment temperature is made as 35 ℃, and spray amount is with area 80cm
2Meter is made as per hour 1.5 milliliters.In addition, test period was made as at most 100 hours.
Based on by the corroded area rate with the fixed value method of commenting of corrosive degree quantification, the corrosive that carries out producing on the tension test sample that has carried out test quantizes, with evaluation value (RT No.) be more than 9.0 be made as qualified, with the evaluation value be lower than 9.0 be made as defective.
These evaluation results are shown in table 3 and table 4.
[table 3]
[table 4]
(result)
According to the content shown in table 1～4, following as can be known result.
(influence of the surfaceness of aluminium blanket (arithmetic average roughness Ra))
Comparative example 1 is because the lower value of the scope of the not enough the present invention's regulation of arithmetic average roughness Ra, therefore becomes the result that anti-finger printing, anti-crackle do not satisfy qualified benchmark.In addition, therefore comparative example 2 becomes the result that oilness, anti-crackle and erosion resistance do not satisfy qualified benchmark because arithmetic average roughness Ra surpasses the higher limit that the present invention limits.
(influence of the average film thickness of resin involucra)
Comparative example 5 is because therefore the lower value of the scope of the not enough the present invention's regulation of the average film thickness of resin involucra becomes the result that anti-finger printing, anti-crackle and erosion resistance do not satisfy qualified benchmark.In addition, therefore comparative example 6 becomes the result that resistance value does not satisfy qualified benchmark because the average film thickness of resin involucra surpasses the higher limit of the scope of the present invention's regulation.
(influence of the resinous principle of resin involucra)
Comparative example 7 is owing to only use acrylic resin; Comparative example 8 is owing to only use urethane resin; Comparative example 9 is owing to only use vibrin; And therefore comparative example 10 all becomes the result that erosion resistance does not satisfy qualified benchmark owing to only use Resins, epoxy.In addition, about comparative example 8,, therefore become the result that anti-crackle does not satisfy qualified benchmark yet owing to only use urethane resin.
In addition, about as resinous principle and used among the embodiment 1 and embodiment 18～23 of acrylic resin composition and urethane resin composition, the ratio of acrylic resin composition and urethane resin composition and the result of erosion resistance are compared.Consequently, by quality ratio, the acrylic resin composition: the urethane resin composition is 5: 95 embodiment 23 and an acrylic resin composition: the urethane resin composition is that the evaluation value of 95: 5 embodiment 1 is 9, but acrylic resin composition: the urethane resin composition is 10: 90 embodiment 22, the acrylic resin composition: the urethane resin composition is 15: 85 embodiment 21 and an acrylic resin composition: the urethane resin composition is that the evaluation value of 90: 10 embodiment 18 is 9.3, become preferred result, in addition, the acrylic resin composition: the urethane resin composition is 50: 50 embodiment 20 and an acrylic resin composition: the evaluation value of the embodiment 19 of urethane resin composition=85: 15 is 9.5, becomes further preferred result.
(influence of the content of the silica composition of resin involucra)
Comparative example 11,12 is because therefore the lower value of the scope that contains quantity not sufficient the present invention regulation of silica composition becomes the result that erosion resistance does not satisfy qualified benchmark.
(influence of the content of the lubricated composition of resin involucra)
Comparative example 13 is because therefore the lower value of the scope that contains quantity not sufficient the present invention regulation of lubricated composition becomes the result that oilness does not satisfy qualified benchmark.
On the other hand, the content of the resinous principle in the surfaceness (arithmetic average roughness Ra) of aluminium blanket, average film thickness, resin involucra, the content of silica composition, lubricated composition all satisfies among the embodiment 1～17 of scope of the present invention's regulation, becomes all no problem result on electroconductibility, oilness, anti-finger printing, anti-crackle and erosion resistance.
In addition, about comparative example 14, although the content of the resinous principle in the surfaceness of aluminium blanket (arithmetic average roughness Ra), average film thickness, the resin involucra, the content of silica composition, lubricated composition all satisfies the scope of the present invention's regulation, the qualified benchmark of the still discontented unabridged version invention of electroconductibility.This is considered to because of arithmetic average roughness Ra is near the lower limit, and average film thickness is to become this result's near the upper limit.Thereby, guaranteeing on the electroconductibility it is prerequisite even we can say the various parameters that the present invention stipulates, neither sufficient condition, in order to realize that reliably the desirable effect of the present invention is the effect of electroconductibility, oilness, anti-finger printing, anti-crackle and excellent corrosion resistance and so on, the resistance value that needs regulation to measure with ad hoc approach is below 10 Ω.
Therefore comparative example 3,4 is all satisfying qualified benchmark of the present invention aspect the effect that obtains, but the base treatment epithelium contains chromium, according to spirit of the present invention, should be in par with the comparative example of the benchmark of discontented unabridged version invention.
More than, detailed explanation by invention, electronics of the present invention is illustrated with pre-coated aluminum plate, but spirit of the present invention is not limited to above-mentioned content, in scope based on the technology of the present invention thought, can suitably change, certainly, should be interpreted as this scope and be also contained in the technological thought of the present invention.
Claims (5)
1. pre-coated aluminum plate of electronics wherein, is the one side at least of the aluminium blanket below the 0.5 μ m more than the 0.3 μ m at arithmetic average roughness Ra, do not establish the base treatment epithelium that contains chromium but is formed with resin involucra,
Described resin involucra is the containing metal element not, contains acrylic resin composition, urethane resin composition, silica composition and emboliform lubricated composition,
The content that described silica composition accounts in the described resin involucra surpasses 12 quality %,
The content of contained described lubricated composition surpasses 8 quality % in the described resin involucra,
The average film thickness of described resin involucra is below the above 1.0 μ m of 0.15 μ m,
With leading section be the spherical terminal of radius 10mm when the described aluminium blanket that is formed with described resin involucra being pushed with the load of 0.4N described spherical terminal and the resistance value between the described aluminium blanket be below 10 Ω.
2. the pre-coated aluminum plate of electronics according to claim 1 is characterized in that, does not establish the base treatment epithelium between described aluminium blanket and described resin involucra.
3. the pre-coated aluminum plate of electronics according to claim 1 and 2 is characterized in that, the particle diameter of contained described lubricated composition is below the 2.5 μ m in the described resin involucra.
4. according to the pre-coated aluminum plate of each described electronics in the claim 1～3, it is characterized in that it is that the following optical characteristics of the above 15 μ m of 0.3 μ m is regulated particulate that described resin involucra also contains the following median size of the above 30 quality % of 1 quality %.
5. according to the pre-coated aluminum plate of each described electronics in the claim 1～4, it is characterized in that what described aluminium blanket was contained contains quantity not sufficient 0.1 quality % as alloy with the chromium that adds element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-037523 | 2010-02-23 | ||
| JP2010037523A JP5555008B2 (en) | 2010-02-23 | 2010-02-23 | Pre-coated aluminum plate for electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102162097A true CN102162097A (en) | 2011-08-24 |
Family
ID=44463542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100485564A Pending CN102162097A (en) | 2010-02-23 | 2011-02-23 | Precoating aluminum plate for electronic device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5555008B2 (en) |
| KR (1) | KR101279287B1 (en) |
| CN (1) | CN102162097A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070730A (en) * | 2013-03-26 | 2014-10-01 | 株式会社神户制钢所 | Pre-coated aluminium plate and manufacturing method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108686911B (en) * | 2018-04-16 | 2021-06-15 | 维沃移动通信有限公司 | Surface treatment method of shell and shell |
| CN110358355A (en) * | 2019-07-02 | 2019-10-22 | 惠州市至上新材料有限公司 | A kind of high abrasion aluminum foil lining paper water-based inks and preparation method thereof for exempting from finishing oil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07195031A (en) * | 1993-12-29 | 1995-08-01 | Shinko Alcoa Yuso Kizai Kk | Organic coated aluminum sheet material excellent in formability and scratch resistance |
| CN1315249A (en) * | 2000-03-31 | 2001-10-03 | 株式会社神户制钢所 | Resin coated metal plate with good machinability and thermal stability |
| CN1454046A (en) * | 2002-04-24 | 2003-11-05 | 株式会社神户制钢所 | ALuminium plate with envelope and electronic equipment parts using the same |
| WO2007116670A1 (en) * | 2006-03-27 | 2007-10-18 | Kabushiki Kaisha Kobe Seiko Sho | Precoated metal plate |
| CN101547752A (en) * | 2006-12-26 | 2009-09-30 | 株式会社神户制钢所 | Precoated metal sheet and process for producing the same |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0790689A (en) * | 1993-09-27 | 1995-04-04 | Kobe Steel Ltd | Production of fin material for heat exchanger |
| JPH10305521A (en) * | 1996-10-22 | 1998-11-17 | Nisshin Steel Co Ltd | Precoated steel sheet of high conductivity and manufacture thereof |
| JP2000218230A (en) * | 1999-01-29 | 2000-08-08 | Nippon Steel Corp | Surface treatment of galvanized steel sheet |
| JP2001335966A (en) * | 2000-05-29 | 2001-12-07 | Kobe Steel Ltd | Aluminum alloy sheet for electronic parts casing |
| JP2003064484A (en) * | 2001-08-17 | 2003-03-05 | Kobe Steel Ltd | Aluminum alloy sheet for cover of electronic equipment, cover of electronic equipment having the aluminum alloy sheet, and electronic equipment having the cover |
| JP4184991B2 (en) * | 2003-02-05 | 2008-11-19 | 株式会社神戸製鋼所 | Surface-treated metal plate |
| JP4348107B2 (en) * | 2003-04-03 | 2009-10-21 | 株式会社神戸製鋼所 | Resin-coated aluminum material and molded product using the same |
| JP4339669B2 (en) * | 2003-11-25 | 2009-10-07 | 東洋鋼鈑株式会社 | Colored surface treatment aluminum plate |
| JP4482364B2 (en) * | 2004-04-08 | 2010-06-16 | 株式会社神戸製鋼所 | Aluminum plate for electronic equipment and molded product for electronic equipment using the same |
| JP5092592B2 (en) * | 2007-07-05 | 2012-12-05 | Ｊｆｅスチール株式会社 | COLORED COATED STEEL, PROCESS FOR PRODUCING THE SAME, PROCESSED PRODUCT, AND PANEL FOR THIN-FIELD TV |
| JP4958877B2 (en) * | 2007-11-16 | 2012-06-20 | 株式会社神戸製鋼所 | Surface-treated metal plate |
| JP2010005545A (en) * | 2008-06-27 | 2010-01-14 | Furukawa-Sky Aluminum Corp | Precoated metallic plate for electronic/electrical equipment |
| JP5413842B2 (en) * | 2010-01-18 | 2014-02-12 | 株式会社Ｕａｃｊ | Conductive pre-coated aluminum alloy plate |
-
2010
- 2010-02-23 JP JP2010037523A patent/JP5555008B2/en not_active Expired - Fee Related
-
2011
- 2011-02-22 KR KR1020110015390A patent/KR101279287B1/en active IP Right Grant
- 2011-02-23 CN CN2011100485564A patent/CN102162097A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07195031A (en) * | 1993-12-29 | 1995-08-01 | Shinko Alcoa Yuso Kizai Kk | Organic coated aluminum sheet material excellent in formability and scratch resistance |
| CN1315249A (en) * | 2000-03-31 | 2001-10-03 | 株式会社神户制钢所 | Resin coated metal plate with good machinability and thermal stability |
| CN1454046A (en) * | 2002-04-24 | 2003-11-05 | 株式会社神户制钢所 | ALuminium plate with envelope and electronic equipment parts using the same |
| WO2007116670A1 (en) * | 2006-03-27 | 2007-10-18 | Kabushiki Kaisha Kobe Seiko Sho | Precoated metal plate |
| CN101547752A (en) * | 2006-12-26 | 2009-09-30 | 株式会社神户制钢所 | Precoated metal sheet and process for producing the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070730A (en) * | 2013-03-26 | 2014-10-01 | 株式会社神户制钢所 | Pre-coated aluminium plate and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101279287B1 (en) | 2013-06-26 |
| JP2011173277A (en) | 2011-09-08 |
| JP5555008B2 (en) | 2014-07-23 |
| KR20110097661A (en) | 2011-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI558546B (en) | Coated metal plate and exterior building material | |
| Liu et al. | Synthesis and evaluation of corrosion resistance of molybdate-based conversion coatings on electroplated zinc | |
| JP4808717B2 (en) | Pre-coated metal plate and manufacturing method thereof | |
| CN101715393A (en) | Methods of preparing thin polymetal diffusion coatings | |
| JP5644983B1 (en) | Organic coated galvanized steel sheet and method for producing the same | |
| KR101781713B1 (en) | Pre-coated aluminum plate, aluminum plate, and heat sink for onboard led lighting | |
| EP3302999B1 (en) | Process for metallising a polymeric surface | |
| CN102162097A (en) | Precoating aluminum plate for electronic device | |
| Komarov et al. | Wetting behavior of wear-resistant WC-Co-Cr cermet coatings produced by HVOF: The role of chemical composition and surface roughness | |
| KR20040044944A (en) | Precoated metal sheet with excellent press formability and process for producing the same | |
| TWI558547B (en) | Coated metal plate and exterior building material | |
| TWI440510B (en) | Pre-coated metal sheet and a manufacturing method | |
| CN101384427B (en) | Precoated metal plate | |
| JP2011037083A (en) | Coated metal material enclosure using coated metal material and coating material composition | |
| JP2007044922A (en) | Precoated metal sheet, its manufacturing method and coated metal formed product | |
| RU2666413C1 (en) | Coated metal sheet, method of its manufacture, and also construction material for external use | |
| CN100482862C (en) | Lubricating metal sheet and process for producing the same | |
| Deng et al. | An Indirect Evaluation Method of Mold Coating Thickness in AlSi Alloy Permanent Mold Casting Production | |
| JP2016112894A (en) | Precoated metal sheet, method for producing the same, and continuous coating device | |
| JP3990663B2 (en) | Surface-treated metal plate, manufacturing method thereof, and lubricating resin and lubricating resin coating composition used in the manufacturing method | |
| JP2910637B2 (en) | Lubricated steel sheet with excellent conductivity | |
| JP5671402B2 (en) | Pre-coated aluminum plate for electronic equipment | |
| JP2006159495A (en) | Coated metal sheet excellent in design properties and processability, and its manufacturing method | |
| Churikova et al. | Selection of conversion layer applied beneath thread lubricant coating | |
| JPH09234820A (en) | Resin-coated metal plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110824 |