CN102470640B - Precoated metal plate - Google Patents
Precoated metal plate Download PDFInfo
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- CN102470640B CN102470640B CN2010800344343A CN201080034434A CN102470640B CN 102470640 B CN102470640 B CN 102470640B CN 2010800344343 A CN2010800344343 A CN 2010800344343A CN 201080034434 A CN201080034434 A CN 201080034434A CN 102470640 B CN102470640 B CN 102470640B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- 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
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- 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
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- 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
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- 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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- 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
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- 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
- B05D2701/00—Coatings being able to withstand changes in the shape of the substrate or to withstand welding
- B05D2701/30—Coatings being able to withstand changes in the shape of the substrate or to withstand welding withstanding bending
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
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Abstract
Disclosed are a precoated metal plate having high heat insulation properties and excellent formability, and a formed article of a coated metal. Specifically disclosed is a precoated metal plate wherein at least two coating layers are provided on one surface or both surfaces of a metal plate. The precoated metal plate is characterized in that a first coating layer, which is a lower-side coating layer of the at least two coating layers, is an air bubble-containing layer, and when the volume concentration of air bubbles contained in the air bubble-containing layer is represented by V (%) and the thickness of the air bubble-containing layer is represented by t ([[mu]]m), the following formulae are satisfied: -0.1t + 57.5 <= V <= -0.05t + 92.5 and 50 <= t <= 350. The precoated metal plate is also characterized in that a second coating layer, which is positioned above the first coating layer, is a coating layer that contains a melamine-curing polyester resin or an isocyanate-curing polyester resin, the number average molecular weight of the polyester resin is 10,000-23,000, and the second coating layer has a thickness of 3-30 [[mu]]m.
Description
Technical field
The present invention relates to have the precoated metal plate of high thermal insulation and the electronic equipment that adopts this precoated metal plate to make as at least a portion.
Background technology
In the past, as the outside plate of the electronic equipments such as computer and digital household appliances, used the metallic plates such as steel plate, aluminium sheet.For such metallic plate, be widely used precoated metal plate because requiring design.
In recent years, be accompanied by the electronization of universal, family's electrical article etc. of computer, in the inside of these computers or family's electrical article, use in a large number motor or electronic unit etc. to become the parts of thermal source.The caloric value of these thermals source constantly increases, therefore when hand touches the outside plate of family's electrical article, and the heat of feeling or and then the problem of scalding.
In the past, for the temperature of the outside plate that suppresses an electrical article rises, taked to arrange the heat transmission peristome or forced the measures such as cooling with fan.In addition, also use various radiative materials or heat insulation material etc., these methods of light, insufficient as countermeasure, need in addition to mount the operation of radiative material or heat insulation material, so hinder productivity, at aspects such as cost increases, problem is arranged also.
Here, even the temperature of metallic plate body rises, as long as be difficult to the heat of the skin conductance metallic plate of contact, just can not feel heat, not worry scalding yet.Thereby the technology as be difficult to the skin conductance that contacts, the surface of metallic plate be given thermal insulation for the heat that makes metallic plate discloses at metal sheet surface and has formed the low technology that contains alveolate film layer of thermal conductivity.For example, disclose in patent documentation 1 and patent documentation 2 and be coated with packed in foam coating, foamed when being heating and curing of coating, made it contain alveolate technology.In addition, in patent documentation 3, disclose the coating that is added with hollow minute particle or thermal expansivity particle by application, thereby contained alveolate technology.
Thereby the present inventors adopt the technology of above-mentioned patent documentation 1～3, form to contain alveolate layer on metallic plate, confirm film performance, and the application in precoated steel plate is studied.Consequently, distinguish: although patent documentation 1,2 invention thermal insulation are good, processability, particularly drawing and forming are poor.In addition, distinguish: although the invention of patent documentation 3 can be carried out drawing and forming, thermal insulation is insufficient.
As mentioned above, thermal insulation and processability this two aspect is not all satisfied in any invention, and present situation is not have proposition to make the desired thermal insulation of outside plate of an electrical article and the technology that can be applicable to precoated metal plate that processability is taken into account.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2005-131830 communique
Patent documentation 2: TOHKEMY 2005-219354 communique
Patent documentation 3: TOHKEMY 2005-193533 communique
Summary of the invention
The problem that invention will solve
The present invention is in view of above-mentioned present situation, and its objective is provides a kind of precoated metal plate and coating metal molding with high thermal insulation and excellent processability.
Be used for solving the means of problem
The present inventors conduct in-depth research for solving above-mentioned problem, found that, by on the one side of metallic plate or on the two sides, coating contains the film layer of larger bubble as shown in Figure 1, can obtain high thermal insulation.In addition, excessive if the size of bubble is compared with coating thickness as shown in Figure 2, the processability of filming and adaptation worsen, if bubble undersized as shown in Figure 3, thermal insulation is poor.In addition, inventors are through further investigation, found that, contain as shown in Figure 1 the film layer of larger bubble, because of the thickness on film coated surface and bubble top thinner, if it is processed or carries out grid test etc., processability or adaptation are deteriorated, therefore, and for solving these problems, investigated as shown in Figure 4 and will contain alveolate film layer as lower coating film (the 1st film layer), coating film (the 2nd film layer) has been set thereon again.And then find: be controlled in certain relational expression scope by thickness and bubble containing ratio with lower coating film, can realize making thermal insulation and processability, the adaptation of the precoated metal plate of design to take into account.In addition, find: the resinous principle of the film layer (the 2nd film layer) by controlling upside, and control shape and the number of the contained bubble of the film layer (the 1st film layer) of downside, thermal insulation and processability, adaptation are taken into account.The present application is based on above-mentioned experience and completes.
That is to say, main idea of the present invention is as follows.
(1) a kind of precoated metal plate, it is characterized in that: be on the one side of metallic plate or have the precoated metal plate of two-layer at least film layer on the two sides, in described two-layer at least film layer, the 1st film layer that is positioned at downside is to contain alveolate gassiness alveolar layer; Be made as volumetric concentration V (%) at the bubble containing ratio with described gassiness alveolar layer, when thickness is made as t (μ m), satisfy following formula-0.1t+57.5≤V≤-0.05t+92.5 and 50≤t≤350; The 2nd film layer that is positioned at described the 1st film layer upside is the film layer that contains melamine cured type mylar or cured with isocyanates type mylar; The number-average molecular weight of described mylar is 10000～23000, and the thickness of described the 2nd film layer is 3～30 μ m.
(2) according to above-mentioned (1) described precoated metal plate, it is characterized in that: be made as T (μ m) at the total film thickness with described the 1st film layer and described the 2nd film layer addition, in the time of will being made as Rv (μ m) at the diameter of the bubble of measuring with the film coated surface vertical direction, in the wide 10mm of section that films arbitrarily, there is the bubble that satisfies Rv 〉=0.8T more than 20.
(3) according to above-mentioned (1) or (2) described precoated metal plate, it is characterized in that: described the 1st film layer and described the 2nd film layer contain respectively the pigment with colour system.
(4) according to wantonly 1 the described precoated metal plate in above-mentioned (1)～(3), it is characterized in that: to the face of the opposition side of the face of the described gassiness alveolar layer of having of described metallic plate, more than 80 ℃ and the frequency of measuring at the temperature of the regulation below 200 ℃ be 600～3000cm
-1The zone in the infrared ray total emissivity be below 0.50.
(5) a kind of electronic equipment is characterized in that: adopt wantonly 1 described precoated metal plate in above-mentioned (1)～(4) as at least a portion of outside plate, the one side with described gassiness alveolar layer is positioned at the exterior side of described outside plate.
The invention effect
According to the present invention, can provide a kind of precoated metal plate and coating metal molding with high thermal insulation and excellent processability.
Description of drawings
Fig. 1 is coating has the cutaway view of precoated metal plate of the film layer of larger bubble.
Fig. 2 is coating has the cutaway view of precoated metal plate of the film layer of the bubble excessive with respect to thickness.
Fig. 3 is coating has the cutaway view of precoated metal plate of the film layer of the bubble too small with respect to thickness.
Fig. 4 is the cutaway view of precoated metal plate of the present invention.
Fig. 5 means the bubble containing ratio of gassiness alveolar layer, in the V (%) of the volumetric concentration diagram with the relation of thickness t (μ m).
Fig. 6 means the key diagram of the summary of the experimental provision that ascending temperature is measured.
But Fig. 7 means the key diagram of the structure of the framework of using in the test of time of contact and ascending temperature mensuration.
Fig. 8 is the photo with the section that is coated with membrane portions of the precoated metal plate of observation by light microscope embodiment No.4.
The specific embodiment
Below, with reference to accompanying drawing, suitable embodiment of the present invention is elaborated.
Precoated metal plate of the present invention has two-layer at least film layer on the one side of the metallic plate that becomes matrix material or on the two sides.In the situation that the so-called D score that adopt the position of two-layer at least film layer of expression precoated metal plate refers to the side near metallic plate, so-called " on " refer to the side away from metallic plate.Particularly, this film layer has the stepped construction that comprises at least the 2nd film layer that contains macromolecule polyester resin (hereinafter referred to as " upper coating ") that contains alveolate the 1st film layer (hereinafter referred to as " gassiness alveolar layer ") and be layered in the top layer side of the 1st film layer.
Described gassiness alveolar layer is characterised in that: the bubble containing ratio of will film in volumetric concentration be made as V (%), when thickness is made as t (μ m), satisfy-0.1t+57.5≤V≤-relation of 0.05t+92.5 and 50≤t≤350.The present inventors find according to result of study: the bubble containing ratio V (%) by making the gassiness alveolar layer satisfies with the relation of thickness t (μ m)-and the relation of 0.1t+57.5≤V and t 〉=50, can access good heat-proof quality, by satisfy V≤-0.05t+92.5 and t≤350, film and follow the distortion of metallic plate, can obtain good processability.
The bubble containing ratio of the alveolar layer of gassiness shown in Fig. 5 is in the relation of V (%) Yu the thickness t (μ m) of volumetric concentration.To adopt in embodiment shown below polyurethane (i) as the adhesive resin of gassiness alveolar layer, adopt blowing agent Cellmic CE to sneak into the agent kind, adopt carbon black as pigment and upper coating to be made as the bubbles tunic of example (embodiment No.4,13～31,39～48) of 15 μ m thick as bubble: the relation of t (μ m) and bubble containing ratio: V (%) arranges, and draws taxonomically the diagram of thermal insulation evaluation result and processability, adaptation evaluation result.The meaning of estimating symbol in figure sees the following form.
| Estimate symbol | Thermal insulation | The processability adaptation |
| ● | ◎ | ◎ |
| ○ | ◎ | ○ |
| ▲ | ◎ | △ |
| × | ◎ | × |
| □ | ○ | △ |
| △ | △ | ◎ |
| ◇ | △ | ○ |
| * | × | ◎ |
Learn from Fig. 5: by bubble containing ratio scope (0.1t+57.5≤V≤-0.05t+92.5) and thickness scope (50≤t≤350) zone that surrounds all obtained good evaluation the both sides of thermal insulation and processability and adaptation.
Here, about above-mentioned thickness t, try to achieve by following method: film in cut-out, imbed resin in after grind, make with the section of the Surface Vertical of filming level and smooth, observe with light microscope or electron microscope, observe the scope of the wide 10mm at 5 positions, obtained by observable mean value.In addition, about bubble containing ratio V, can be by the section of filming with shootings such as electron microscopes, cover transparent sheet used in OHP above photo, after critically having described bubble section, cut bubble section and other is coated with membranous part, quality is separately measured, set area occupation ratio=volume fraction, can obtain V by mass ratio.About this bubble containing ratio V, the scope of also observing the wide 10mm at 5 positions is used observable mean value.
in addition, with the total film thickness of the gassiness alveolar layer of precoated metal plate and upper coating addition (as described later, in the situation that also have layer under the gassiness alveolar layer, do not comprise the thickness that is positioned at the layer under it) be made as T (μ m), when the diameter of the bubble of direction that will be vertical with film coated surface is made as Rv, there is the bubble of satisfying more than 20 〉=0.8T in the wide 10mm of section if film arbitrarily, because form the concavo-convex of appropriateness on the surface, the contact area of skin and precoated metal plate reduces with touch precoated metal plates such as fingers the time, thereby can reduce conduction to the heat of skin.And, and the part of skin contact is the zone that exists the heat of the low bubble of thermal conductivity itself to be difficult to conduct between film coated surface and steel plate.In addition, also can obtain being formed at the recess of filming and the effect of heat insulation of the air layer between skin.By these synergies, can obtain good thermal insulation, thereby the preferred bubble that has satisfying more than 20 〉=0.8T in the wide 10mm of section that films arbitrarily.Have again, about diameter or the quantity of the bubble in the gassiness alveolar layer, with light microscope or electron microscope observation that film with section Surface Vertical, the scope of observing the wide 10mm at any 5 positions is obtained by observable mean value.
As adhesive used in the gassiness alveolar layer, can adopt general known adhesive, such as mylar, polyurethane resin, acrylic resin, epoxy resin, melmac, Corvic etc., in addition, these resins can be also the arbitrary classes in thermoplastics type, heat curing-type.Wherein, ductility high and with upper coating in mylar used be that the adaptation of coating good polyurethane resin, mylar are suitable as adhesive.
In the situation that adopt polyurethane resin, mylar, the glass transition temperature of these resins (Tg) is fit to for-10～70 ℃.During lower than-10 ℃, the misgivings that can not fully form epithelium are arranged at the Tg of polyurethane resin, mylar, in addition, when surpassing 70 ℃, epithelium much higher hard, the misgivings that therefore have processability to descend.
As making the gassiness alveolar layer contain the method for bubble, there is no particular limitation, such as if coating be added with as Celogen Az, azodiisobutyronitrile etc. when heating while produce organic foaming agent that gas decomposes or microencapsulation enclosed thermal expansivity particle that solvent in particle etc. expands because of sintering or inorganic be the coating of hollow-particle or organic system hollow-particle etc., carry out sintering just passable.
Have again, in gassiness alveolar layer in the present invention, when the part of the gas that produces when being used to form above-mentioned bubble is discharged from epithelium, sometimes in formation hole, epithelium surface, but because being provided with coating on the gassiness alveolar layer, therefore on performance without large impact, can not become special problem.
In coating, adopt the mylar of melamine cured type mylar or cured with isocyanates type as base resin on of the present invention.
As mentioned above, by the diameter of the bubble containing ratio of gassiness alveolar layer, thickness, bubble is controlled, can guarantee thermal insulation, guarantee simultaneously processability to a certain degree.; the present inventors find: when only adopting the gassiness alveolar layer; can not satisfy the processing characteristics as target; be that 10000～23000 melamine cured type mylar or number-average molecular weight are that the mylar of 10000～23000 cured with isocyanates type arranges coating by adopting number-average molecular weight on the upper strata of gassiness alveolar layer as base resin, can obtain necessary good processing characteristics.
The main resin of upper coating is defined as mylar and number-average molecular weight is defined as 10000～23000 reason be, by ductility and the good mylar of adaptation are guaranteed processability as upper coating, the reason that mylar is defined as melamine cured type mylar or cured with isocyanates type mylar is in order to obtain good the filming of hardness and ductility.Lower than 10000 o'clock, processability was deteriorated in the number-average molecular weight of the mylar of upper coating.If the number-average molecular weight of the mylar of upper coating surpasses 23000, processability is deteriorated.In addition, if the number-average molecular weight of the mylar of upper coating surpasses 23000, film coated surface is too soft, and traumatic resistance is deteriorated, therefore this is worth as higher limit.
Having, is 10000～23000 melamine cured type mylar or cured with isocyanates type mylar contain 80 quality % in adhesive resin more than by making described number-average molecular weight again, can bring into play the raising effect of good processability.
On be coated with film layer thickness be preferably 3～30 μ m.During lower than 3 μ m, processability is deteriorated, is therefore unaccommodated at the upper thickness that is coated with film layer.If on be coated with film layer thickness surpass 30 μ m, shrinkage pool (わ I) easily occurs during application, in addition, consider it is also unaccommodated from the cost aspect.And, if on be coated with film layer thickness surpass 30 μ m, the misgivings of the concavo-convex effect of heat insulation that brings of the shape that can not get the bubble by controlling the gassiness alveolar layer or the film coated surface that the bubble amount forms are arranged.
On reaching, gassiness alveolar layer of the present invention can add as required coloring pigment in coating.As coloring pigment, can use general known inorganic series pigments, organic system pigment, metallic pigments.For example, can list carbon black, titanium oxide, zinc oxide, naphthol reds, dual-azo yellow, bisazo pyrazolone orange, aluminium pigment, nickel pigment etc.
Add coloring pigment in gassiness alveolar layer and upper coating to preferably with colour system.By gassiness alveolar layer and upper coating are defined as same colour system, can obtain stable tone appearance, can wait coating on attenuate by processing simultaneously, even some crackles perhaps occur, also can suppress the variation of outward appearance, tone, therefore be fit to.
In the situation that add coloring pigment in reaching coating to gassiness alveolar layer of the present invention, its addition is with respect to adhesive resin solid constituent 100 mass parts, preferably coloring pigment is defined as below 130 mass parts.If coloring pigment surpasses 130 mass parts, the amount of coloring pigment is too much, and having films becomes fragile, processability and the deteriorated possibility of adaptation.
On reaching, gassiness alveolar layer of the present invention in coating, can add in the lump as required rust resisting pigment, antirust agent.For example, the absorption that can to use the general known chromium such as strontium chromate, calcium chromate be rust resisting pigment or trbasic zinc phosphate, zinc phosphite, aluminum phosphate, aluminium phosphite, molybdate, molybdenum phosphate hydrochlorate, vanadic acid/phosphoric acid hybrid pigment, silica, be called as calcium-silicate has rust resisting pigment and the antirust agent of the general known non-chromiums such as silica of the type of Ca.In above-mentioned rust resisting pigment and antirust agent, preferred use does not contain rust resisting pigment and the antirust agent that the carrying capacity of environment material is the non-chromium of chromate.
In the situation that add rust resisting pigment in reaching coating to gassiness alveolar layer of the present invention, its addition preferably with respect to adhesive resin solid constituent 100 mass parts, is defined as 10～130 mass parts with rust resisting pigment.During lower than 10 mass parts, the deteriorated possibility of corrosion resistance is arranged at the addition of rust resisting pigment, too much because of the amount of rust resisting pigment if the addition of rust resisting pigment surpasses 130 mass parts, become fragile and film, the possibility that processability and adaptation are deteriorated.
Have again, in the situation that add the both sides of above-mentioned coloring pigment and rust resisting pigment in reaching coating to gassiness alveolar layer of the present invention, preferably, the upper limit of its addition with respect to adhesive resin solid constituent 100 mass parts, is defined as below 130 mass parts with the total amount of pigment.If the total addition of pigment surpasses 130 mass parts, the amount of pigment is too much, and filming becomes fragile, the possibility that processability and adaptation are deteriorated.
In addition, on reaching, gassiness alveolar layer of the present invention in coating, can add as required general known levelling agent, pigment dispersing agent etc.The not special regulation of the kind of these additives and addition can be suitable selected as required.
Gassiness alveolar layer of the present invention and the enough general known coating process of upper coating energy, be coated with machine, injection application etc. such as roll coater, roller curtain coater, dehydration roll (wringer roll) and carry out application, then, with general known coating with sintering furnace, such as hot-air drying stove, induction heater, infrared furnace or and the stove that forms with them etc. carry out sintering.Generally, if make with the continuous precoated metal plate manufacturing equipment that is called as CCL (ContinuousCoating Lines), can produce in enormous quantities expeditiously, therefore be more suitable for.In the situation that carry out application with CCL, be fit to coating film under roll coater or curtain coater application, with coating film in the curtain coater application.Curtain coater is different from roll coater, can carry out non-contactly application with substrate, if therefore coating and dry solidification the of the present invention lower coating film (the 1st film layer) of the bubble that contains foaming on the curtain coater application on coating film (the 2nd film layer), the bubble ground that can not crush in lower coating film carries out application, the application outward appearance is also beautiful, therefore is more suitable for.If with coating film in the roll coater application, while therefore the bubble application in the lower coating film of crushing during application has the possibility of the bad order after infringement thermal insulation or upper coating film application.If adopt lower coating film and upper coating film before the stacked drying of coating apparatus while multilayer while that is called as the slip curtain coater, carry out curtain flow coat cloth, the dry solidification operation after application is 1 operation, can multilayer carry out simultaneously dry solidification, therefore the viewpoint from energy reduction or production efficiency is more suitable for.
Precoated metal plate of the present invention can application has the antirusting paint function under the gassiness alveolar layer as required the primary coat rete.If application primary coat rete, the corrosion resistance of metallic plate improves, and therefore is more suitable for.As being coated with the primary coat rete that is contained on precoated metal plate of the present invention, the bottom coating that can use general known precoated metal plate to use is that bottom coating, epoxy are bottom coating, polyurethane series bottom coating etc. such as polyester.The curing agent of bottom coating can be any in melamine series, isocyanate-based.As the rust resisting pigment that adds in bottom coating, can use chromate, phosphoric acid system, the general known rust resisting pigment such as silica-based, but except chromate, remaining rust resisting pigment is little to the load of environment, so is more suitable for.
Be coated with the bottom coating that is contained on precoated metal plate of the present invention, the enough general known coating process of energy, such as roll coater, roller curtain coater, dehydration roll coater, injection application etc. are carried out application, then, with general known coating with sintering furnace, such as hot-air drying stove, induction heater, infrared furnace or and the stove that forms with them etc. carry out sintering.
In precoated metal plate of the present invention, preferably have the gassiness alveolar layer one side opposing face more than 80 ℃ and the frequency of measuring at the temperature of the regulation below 200 ℃ be 600～3000cm
-1The zone in the infrared ray total emissivity be below 0.50.
In the situation that to metallic plate incident caloradiance, caloradiance sees through hardly, so caloradiance is any in reflection or absorption.Here, when the caloradiance that produces at the heater by framework inside was incident on the inner surface of framework outside plate, if the caloradiance major part of incident is absorbed, the temperature of framework outside plate rose.If according to relevant thermal-radiating Kirchhoff's law, at a certain temperature, that the absorptivity of object and radiance become is identical (for example with reference to " the mechanical engineering basis lecture electric heating engineering " of Xi Chuan, rattan Tian Gongzhu, p.290, distribution: science and engineering society (1983)).Thereby the present inventors study in great detail the radiance of the opposing face that contains alveolate one side, found that, cover the radiance of inboard of the framework outside plate of heater by reduction, and the temperature of framework outside plate reduces.That is to say, the opposing face of the one side by will have the gassiness alveolar layer is as the inboard of framework, with this face more than 80 ℃ and the frequency of measuring under the range temperature below 200 ℃ be 600～3000cm
-1The zone in total emissivity be defined as below 0.50, preferably be defined as below 0.40, can greatly reduce the temperature of framework outside plate.
Frequency is lower than 600cm
-1, or surpass 3000cm
-1Frequency field very little on the impact of the heat of framework outside plate, the radiance that therefore comprises these frequency fields is unaccommodated.Be limited to 600～3000cm by the frequency that will measure
-1The zone, can high accuracy and effectively measure.
In addition, in the temperature of measuring radiance during lower than 80 ℃, because detecting error from too small easily generation of the emittance of epithelium radiation when measuring radiance, so be unaccommodated.By measuring more than 80 ℃ and at the temperature below 200 ℃, can measure accurately.In addition, when measuring temperature over 200 ℃, the misgivings that make epithelium generation thermal decomposition because of the epithelium kind being arranged, is therefore unaccommodated.
In order to improve the heat reflectivity of framework inboard, in the situation that the metal mother metal itself has high heat reflectivity, it is exposed be fit to.In addition, if at the higher metal of the coating surface heat reflectivity of metallic plate, be more suitable for.
As the high metal material of heat reflectivity, can adopt general known metal material, their alloy, their metal materials of plating such as aluminium, nickel, stainless steel, zinc.The fruit of looking like of framework inboard exposes because these metallic plates or coating not being applied epithelium, and heat reflectivity improves more, is fit to.In the situation that adopt steel plate, hot-dip galvanized steel sheet, plated steel sheet, zn-ni alloy deposits steel plate, alloyed hot-dip galvanized steel plate, aludip, al-zn alloy coating steel plate etc. are fit to.
, if expose metal, easy corrosion from here therefore preferably implements to change into processing.But, have kind or adhesion amount because changing into processing to make the possibility of heat reflectivity reduction, so be necessary suitable selection kind or adhesion amount as required.
As changing into processing, can use the processing that changes into of general enforcement, particularly, for example, can use that trbasic zinc phosphate system changes into that processings, chromate-free system changes into that processings, application type chromate are processed, the processing of electrolysis chromic acid, react chromate processing etc.Wherein, because the application type chromate is processed, the electrolysis chromic acid is processed, the reaction chromate is processed and contained the i.e. 6 valency chromium of carrying capacity of environment material, therefore not too preferred.In addition, trbasic zinc phosphate is to change into to process to compare with other processing, also has to make the deteriorated misgivings of processing adaptation.So as the processing that changes into that imposes on metal material of present embodiment, being fit to adopt chromate-free is to process.
System changes into processing as chromate-free, and the processing that changes into inorganic agent of adopting inorganic system, the processing that changes into inorganic agent that reaches the employing organic system are arranged, and which kind of can.particularly, system changes into processing as chromate-free, for example, known have employing to contain silane coupling agent, zirconium compounds, titanium compound, tannin or tannic acid, resin, the processing of the aqueous solution of silica etc. etc., also can use Japanese kokai publication sho 53-9238 communique, Japanese kokai publication hei 9-241576 communique, TOHKEMY 2001-89868 communique, TOHKEMY 2001-316845 communique, TOHKEMY 2002-60959 communique, TOHKEMY 2002-38280 communique, TOHKEMY 2002-266081 communique, the known technology of record in TOHKEMY 2003-253464 communique etc.In addition, change in processing at these, the 3 valency chromium systems that can use the chromate-free of chromate inorganic agent " ZM-1300AN " such as Japanese Parkerizing company system, Japanese Parkerizing company system to change into inorganic agent " CT-E300N ", Japanese Paint company system change into the inorganic agent that changes into of selling on the market such as inorganic agent " Surfcoat (registration mark) NRC1000 ".
Metallic plate of the present invention is suitable as the outside plate of electronic equipment.Mode by metallic plate of the present invention is become exterior side with the face with described gassiness alveolar layer is as the outside plate of electronic equipment etc., even in the situation that skin directly contacts with the outside plate of electronic equipment, also difficulty is felt heat, but also can prevent from scalding, and therefore is fit to.
As using at least a portion of outside plate the electronic equipment of metallic plate of the present invention, for example, can list the automotive electronics equipment such as digital household appliances goods, auto navigation, automobile AV such as desktop computer PC (Personal Computer), slim TV etc.In addition, also can adopt metallic plate of the present invention as the part of the outside plate of the mobile goods such as notebook type PC, portable phone.
Embodiment
Then, adopt embodiment to carry out more specific description to the present invention, but formation of the present invention is not limited to following embodiment.
(embodiment 1)
At first, the coating that adopts in the present embodiment is elaborated.In the present embodiment, metal sheet surface is double-decker, stacked gradually gassiness alveolar layer (the 1st film layer from this metallic plate side, below also referred to as " lower coating film "), upper coating (the 2nd film layer, below also referred to as " upper coating film "), this steel plate back side is without application or form the back side and film.Below, with the order of gassiness alveolar layer with coating (hereinafter referred to as " lower coating "), upper coating material (hereinafter referred to as " upper coating "), CB coating, the paint ingredient that uses is described.
At first, lower coating is elaborated.
Be in " Desmophen (registration mark) 1150 " firmly changing Bayer polyurethane company polyalcohol processed, reach polyalcohol with the solid constituent ratio: the mode of blocked isocyanate=66: 34 is added the blocked isocyanate i.e. " Desmodur (registration mark) BL1100 " of firmly changing Bayer polyurethane company system, makes thus transparent (clear) coating (being recited as " polyurethane (i) " in table).Have again, as solvent, adopt isophorone.
As base resin, the amorphous polyester resin that uses Japan to spin company's system is " BYLON (registration mark) 600 " (number-average molecular weight 16000).As crosslinking agent, the butylated melamine resins that adopts DIC company system i.e. " SUPER BECKAMINE (registration mark) J830 " (being recited as the butylation melamine) in table.(being recited as " polyester " in table).Have again, as solvent, adopt by cyclohexanone: SOLVESSO 150=1: 1 solvent that mixes.
As other base resin, the epoxy resin that uses DIC company system i.e. " EPICLON (registration mark) P-439 ".As crosslinking agent, the butylation melamine that adopts DIC company system i.e. " SUPERBECKAMINE (registration mark) J830 ".(being recited as " epoxy " in table).Have again, as solvent, adopt by cyclohexanone: SOLVESSO 150=1: 1 solvent that mixes.
In addition as other base resin, the acrylic resin that uses Japanese catalyst company system i.e. " ACRYSET (registration mark) AST-5531 ".As crosslinking agent, the butylated melamine resins that adopts DIC company system i.e. " SUPER BECKAMINE (registration mark) J830 " (being recited as the butylation melamine) in table.(being recited as " acrylic compounds " in table).Have again, as solvent, adopt by cyclohexanone: SOLVESSO 150=1: 1 solvent that mixes.
Then, add phthalic anhydride 100 mass parts, neopentyl glycol 57 mass parts, trimethylolpropane 48 mass parts in 1 liter of flask of four mouths that possess mixer, thermometer, nitrogen ingress pipe and condenser, stir on one side under nitrogen on one side and carry out condensation reaction at 210 ℃, water is distillated.Then, be cooled to 100 ℃, add 6-caprolactone 531 mass parts, be warmed up to 150 ℃, after insulation 3 hours, be cooled to 100 ℃, add cyclohexanone 78 mass parts, synthetic polyalcohol.
By in synthetic polyalcohol, reach polyalcohol with the solid constituent ratio: the mode of blocked isocyanate=66: 34 is added the blocked isocyanate i.e. " Sumidur (registration mark) BL3175 " of firmly changing Bayer polyurethane company system, makes clear dope (being recited as " polyurethane (ii) " in table).Have again, adopt isophorone as solvent.Solid component concentration in coating considers that bubble contains sexual, coating, storage stability and through suitable adjustment.
In order to contain bubble, adopt i.e. " Cellmic (registration mark) CE ", the Ganz hollow-particle i.e. " Gantsuparu GMH-850 " that changes into company's system of blowing agent that three associations change into company's system.
In addition, as coloring pigment, as the pigment of black system, the carbon black that adopts East Sea charcoal company system i.e. " East Sea carbon black (registration mark) #7350 ", as the pigment of white system, the titanium oxide of the former industry of employing stone company system is the zinc oxide of selling on " titanium white (TIPAQUE WHITE; registration mark) CR-95 " and market, as blue series pigments, adopts cobalt aluminate and the copper phthalocyanine sold on market, as the pigment of red system, adopt iron oxide and the mercuric sulphide sold on market.
Then, upper coating is elaborated.
as base resin, the amorphous polyester resin that uses Japan to spin company's system is " BYLON (registration mark) 660 " (number-average molecular weight 8000), " BYLON (registration mark) GK250 " (number-average molecular weight 10000), " BYLON (registration mark) GK140 " (number-average molecular weight 13000), " BYLON (registration mark) 240 " (number-average molecular weight 15000), " BYLON (registration mark) 600 " (number-average molecular weight 16000), " BYLON (registration mark) 280 " (number-average molecular weight 18000), " BYLON (registration mark) 245 " (number-average molecular weight 19000), " BYLON (registration mark) 103 " (number-average molecular weight 23000), " BYLON (registration mark) 550 " (number-average molecular weight 28000).As crosslinking agent, the butylated melamine resins (being recited as the butylation melamine in table) i.e. of using DIC company system " SUPER BECKAMINE (registration mark) J830 ", the isocyanate compound of firmly changing Bayer polyurethane company system is " Desmodur BL3175 (trade name) " (being recited as HDI in table).As solvent, adopt with mass ratio by cyclohexanone: SOLVESSO150=1: 1 solvent that mixes.
As coloring pigment, adopt the coloring pigment identical with lower coating.
As CB coating, the CB coating that adopts Japanese FINE COATINGS company system i.e. the grey (being recited as " back side-1 " in table), the Transparent color (being recited as " back side-2 " in table) of " FL100HQ " of " FL100HQ ".
Below, the precoated metal plate that adopts in the experiment to embodiment is elaborated.
As raw sheet, preparation plated steel sheet (being recited as " EG " in table), hot-dip galvanized steel sheet (being recited as " GI " in table), alloy galvanized steel plate (being recited as " GA " in table), stainless steel (are recited as " SUS "), aluminium sheet in table.
Then, the aqueous solution that is 50 ℃ of 2 quality %, water temperature with the concentration of the alkali degreasing liquid " FC-4336 " of Japanese Parkerizing company system with the raw sheet prepared sprays degreasing, carry out drying after washing, then change into the chromate-free of the Japanese Parkerizing of roll coater coating company system and process i.e. " CT-E300N ", make its drying with hot-air oven.The arrival plate temperature that drying condition in hot-air oven is set as steel plate is 60 ℃.The adhesion amount that chromate-free is processed adheres to 200g/m by the total solid composition
2, so carry out application.
Then, with the roll coater lower coating that simultaneously application is made on a side's of the metallic plate of having implemented to change into processing surface, application CB coating on the opposing party's surface with being blown into the induction heater of hot blast, is to carry out dry solidification under the condition of 220 ℃ in the arrival plate temperature of metallic plate.Then, after drying and sintering, to the metallic plate of application atomizers spray water, carry out water-cooled.
Then, on lower coating film, with coating in the application of roller curtain coater, with the induction heater that is blown into hot blast, be that the condition of 230 ℃ is carried out dry solidification by the arrival plate temperature of metallic plate.Then, after drying and sintering, the metallic plate of application is carried out water-cooled with atomizers spray water, make double-deck precoated metal plate.
Below, the evaluation method of the precoated metal plate made by experiment is elaborated.
1. thermal insulation
But measure 1.1 adopt the time of contact of hot plate and ascending temperature
The mode of precoated metal plate take the surface as upside of making placed 120 seconds being heated on the hot plate of 65 ℃, then, with forefinger, the surface of precoated metal plate is pressed the load of 500g, measure the time that contacts of not feeling heat, estimate based on following benchmark.Have, 5 people implement same test again, with estimating its average time.(be expressed as " thermal insulation (i) " in table.)
◎: more than 10 seconds more than zero: 5 second and lower than 10 seconds △: more than 2 seconds and lower than 5 seconds *: lower than 2 seconds
In addition, ascending temperature shown in Fig. 6 is measured the summary of experimental provision used.The mode of precoated metal plate take the surface as upside of making placed 120 seconds being heated on the hot plate of 65 ℃, sandwich thermocouple between silicon rubber (thickness 3mm, 10mm are square), with 1g/mm
2It by on the precoated metal plate surface, is measured the temperature after 30 seconds, carried out estimating (being expressed as " thermal insulation (ii) " in table) by following benchmark.This is to regard silicon rubber as skin, the test of the temperature that the simulation people feels.
◎: lower than 35 ℃ more than zero: 35 ℃ and lower than 37 ℃ of △: more than 37 ℃ and lower than 39 ℃ *: more than 39 ℃
But measure 1.2 adopt the time of contact of framework and ascending temperature
Make framework shown in Figure 7, test.The upper surface of framework is opened wide, and covers take the back side of the precoated metal plate made as inboard mode the face that this opens wide, and under this state, the heat of thermal source is defined as 15W, places 120 seconds.Similarly the load of 500g is pressed on the surface of precoated metal plate with forefinger with 1.1, but measure the time of contact of not feeling heat, estimate based on following benchmark.Have, 5 people implement same test again, (are expressed as thermal insulation (iii) in table to have carried out its average time estimating.)
◎: more than 10 seconds more than zero: 5 second and lower than 10 seconds △: more than 2 seconds and lower than 5 seconds *: lower than 2 seconds
2. processability
As the evaluation of processability, investigated by the following method the cylinder deep drawability.By punch diameter 50mm, drift shoulder R3mm, mould shoulder R3mm, deep-draw than 2.0, the condition of BHF1t carries out, steel plate is carried out being estimated by following benchmark by the processing of metal pattern to the pull and stretch punching press.
◎: the visualization processing department, when there is no crackle, variable color etc. fully
Zero: the visualization processing department, do not find crackle, but when finding variable color
△: the visualization processing department, when finding slight crackle
*: the visualization processing department, when finding large crackle
3. adaptation
By the grid tape test, measured adaptation.According to the method for JIS K5600-5-6, implement the grid tape test, estimate by following benchmark.
◎: when fully not finding to peel off
Zero: when finding to peel off on a small quantity at the edge of grid eye
△: 80% of grid eye is not peeled off and when residual
*: do not peel off and residual grid eye lower than 80% the time
4. stain resistance
As the evaluation of stain resistance, investigated anti-marking contaminative by following.The precoated metal plate of making is cut into 50mm square, draw 3 lines at evaluation face with red omnipotent ink (registration mark), after placement was placed in 24 hours in the atmosphere of 20 ℃, wipe line with ethanol.The residual look of visual judgement ink.Estimate by following benchmark.
◎: marking vestige disappears, when cannot see
Zero: marking vestige is a small amount of when residual
△: when marking vestige is residual
*: when marking vestige does not almost disappear
5. traumatic resistance
With determination of pencil hardness traumatic resistance.Method according to JIS K5600-5-4, the disrumpent feelings investigation of filming when the cut repellence of will film is transformed into the hardness of pencil-lead, the highest disrumpent feelings hardness do not occur with filming as this pencil hardness of filming, estimate by following benchmark.
◎: HB above zero: B △: 2B *: below 3B
6. the radiance at the back side is measured
Adopt the Fourier transform infrared spectrophotometer " VALOR-III " of Japanese light splitting company system, the frequency 600～3000cm the when plate temperature of the surface-treated metal plate that will make is defined as 80 ℃
-1The zone in infraluminescence spectrum measure, compare by the luminescent spectrum with itself and standard black matrix, measured the total emissivity of surface-treated metal plate.Have again, as the standard black matrix, adopt thickness with 30 ± 2 μ m to the iron plate atomized spray painting TASCO JAPAN company sell the black matrix that " the THI-1B black matrix spray " of (OKITSUMO company make) forms.
Press formation and its evaluation result of the precoated metal plate of the present embodiment making shown in table 3,4.
Below, evaluation result is elaborated.
(1) impact of the molecular weight of upper coating film
As the impact of the molecular weight of upper coating film, embodiment shown in No.1～12, comparative example shown in No.37,38.
The precoated metal plate of embodiments of the invention has good thermal insulation, processability, adaptation, stain resistance, traumatic resistance.
The molecular weight of upper coating film is that the molecular weight of the processability of 10000 precoated metal plate (No.1) and upper coating film is that stain resistance and the traumatic resistance of 23000 example (No.7) has the tendency that descends a little, and the molecular weight of therefore upper coating film is preferably 13000～19000.Molecular weight is deteriorated lower than the processability of 10000 example (No.37), is therefore unaccommodated.It is deteriorated that the molecular weight of upper coating film surpasses stain resistance and the traumatic resistance of 23000 example (No.38), is therefore unaccommodated.
(2) bubble contains the relation of the thickness of concentration and lower coating film
The relation that contains the thickness of concentration and lower coating film as bubble, comparative example shown in embodiment, No.39～48 shown in No.13～31.
The precoated metal plate of embodiments of the invention has good thermal insulation, processability, adaptation, stain resistance, traumatic resistance.
The relation that contains concentration V volume (%) and thickness t (μ m) about bubble, V＜-thermal insulation of the example (No.39,41,43,45) of 0.1t+57.5 is deteriorated, V＞-processability and the adaptation of the example (No.40,42,44,46) of 0.05t+92.5 is deteriorated, is therefore unaccommodated.In addition, thickness is deteriorated lower than the thermal insulation of the example (No.47) of 50 μ m, and thickness is deteriorated over processability and the adaptation of the example (No.48) of 350 μ m, is therefore unaccommodated.
(3) impact of the thickness of upper coating film
As the impact of the thickness of upper coating film, embodiment shown in No.32～36, comparative example shown in No.49～51.
The precoated metal plate of embodiments of the invention has good thermal insulation, processability, adaptation, stain resistance, traumatic resistance.
The thickness of upper coating film is the tendency that the example (No.32) of 3 μ m has processability, adaptation and traumatic resistance to descend a little, the thickness of upper coating film is the tendency that the example (No.36) of 30 μ m has cost to increase a little, and the thickness of therefore upper coating film is 5～25 μ m more preferably.In addition, do not go up the thickness of the example (No.49) of coating film, upper coating film lower than the example (No.50) of 3 μ m, processability, adaptation and traumatic resistance are deteriorated, and the thickness of upper coating film is high over the cost of the example (No.51) of 30 μ m, are therefore unaccommodated.
(4) bubble diameter and the relation that adds up to thickness
As bubble diameter and the relation that adds up to thickness, embodiment shown in No.52～56.
About the relation at diameter Rv (μ m) with the total thickness T (μ m) of lower coating film and upper coating film addition of the bubble of the direction detection vertical with film coated surface, learn: in the width of section 10mm of filming arbitrarily, the tendency that the bubble that satisfies Rv 〉=0.8T has thermal insulation to descend a little lower than the example (No.54,56) of 20, thereby in section 10mm arbitrarily, the bubble that satisfies Rv 〉=0.8T is preferably more than 20.
(5) impact of the coloring pigment of lower coating film and upper coating film
As the impact of the pigment of lower coating film and upper coating film, embodiment shown in No.57～74.the example that the coloring pigment of lower coating film and upper coating film is identical (No.57～60), lower coating film and upper coating film do not contain the example (No.61) of coloring pigment, the coloring pigment of lower coating film and upper coating film is the example (No.62 with colour system, 63,68～71), excellent processability, and the coloring pigment of lower coating film and upper coating film is not example (No.64～67 with colour system, 72～74) see some variable colors processing department is visual, therefore the misgivings that have processability to reduce, so the pigment of lower coating film and upper coating film is for to be fit to colour system.
(5) impact of the radiance at the back side
As the impact of the radiance at the back side, comparative example shown in embodiment, No.69 shown in No.58～68.
Learn: have the radiance at the back side more to reduce the tendency that thermal insulation more improves, the radiance at the back side is to be fit to below 0.50.In addition, learn: even the radiance at the back side is low, the surface is that the thermal insulation of extraneous example of the present invention (No.79) is also poor.
(embodiment 2)
The embodiment No.73 of use table 6 and the precoated metal plate of comparative example No.79 take the inboard as the back side as the rear board of slim TV, and display frame touched rear board with forefinger after 2 hours, but measure time of contact.Have, 5 people implement same test again.In addition, as a comparison, after plated steel sheet was processed into the shape of rear board, the polyethylene foamed thin plate of crimping Furukawa company system i.e. " Foams (registration mark) SN-500 ", and the metallic plate that obtains is carried out same evaluation.
All experimenters can contact more than 1 minute in No.73, but but in No.79 time of contact be below 5 seconds.In addition, the metallic plate of having pasted the polyethylene foamed thin plate can contact more than 1 minute, needed the time but paste, and also diminished outward appearance, was therefore unaccommodated.
(embodiment 3)
The precoated metal plate of No.4 in table 3 is with coating under the roll coater application, make its dry solidification with the induction heater that is blown into hot blast, after water-cooled, with coating film in the application of roller curtain coater, make its dry solidification with the induction heater that is blown into hot blast, then the precoated metal plate that carries out water-cooled and obtain, but also available different coating process is made identical therewith precoated metal plate.Under with the application of roller curtain coater coating film and make its dry solidification after, be No.87 by the precoated metal plate made from coating film in the application of roller curtain coater.Except coating process, No.87 is by making with the identical condition of No.4.In addition, after with the stacked lower coating film of apparatus for coating while multilayer while that is called as the slip curtain coater and upper coating film, the induction heater that is blown into hot blast by use is that the condition of 230 ℃ makes lamination epithelium dry solidification simultaneously by the arrival plate temperature of metallic plate, and carry out water-cooled, with the precoated metal plate made thus as No.88.Except be coated with simultaneously upper coating film and lower coating film with the slip curtain coater, and simultaneously sintering, the precoated metal plate of No.88 is made by the condition identical with No.4.In addition, will be under with the application of roller curtain coater coating film and make its dry solidification after, with the roll coater application on coating film and the precoated metal plate made as No.89.Except coating process, No.89 is by making with the identical condition of No.4.
To the precoated metal plate of making, thermal insulation, processability, adaptation, the stain resistance of record in (embodiment 1), the evaluation of traumatic resistance have been carried out.The evaluation result of No.87 and No.88 comes to the same thing with each evaluation test of the described No.4 of table 3 fully, but the thermal insulation of No.89 1. and evaluation result 2. be △, for hang down the result of some than No.4.Deduction is with roll coater application upper strata epithelium the time, and roll-in is broken makes thermal insulation deteriorated because the bubble in lower coating film is coated.In addition, No.4,87,88 application beautiful appearance, but the upper coating film of No.89 is mottled apperance.Infer that this is also that coating roller while crushing lower coating film application, thereby produces concavo-convexly because of with the roll coater application time, becomes mottled when the fine finishining of upper coating film on substrate.Learn from this result: utilize the upper coating film of curtain coater application the present application to be fit to.
Have again, shown in Fig. 8 with the photo of the section that is coated with membrane portions of the precoated metal plate of observation by light microscope embodiment No.4.
Above, preferred embodiment be illustrated of the present invention with reference to accompanying drawing, the present invention is not limited to described example certainly.Obviously, so long as those skilled in the art just can associate various modifications or fixed case in the described category of Patent right requirement scope, these modifications or fixed case also are interpreted as belonging to technical scope of the present invention certainly.
Symbol description
The 1-hot plate
The 2-precoated metal plate
3-silicon rubber
The 4-thermocouple
The 5-thermal source
The 6-temperature controller
Claims (6)
1. precoated metal plate is characterized in that: be to have the precoated metal plate of two-layer at least film layer on the one or both sides of metallic plate,
In described two-layer at least film layer, the 1st film layer that is positioned at downside is the gassiness alveolar layer;
Be made as volumetric concentration V, when thickness is made as t, satisfy following formula at the bubble containing ratio with described gassiness alveolar layer:
-0.1t+57.5≤V≤-0.05t+92.5 and
50≤t≤350，
In formula, the unit of V is %, and the unit of t is μ m,
The 2nd film layer that is positioned at described the 1st film layer upside is the film layer that contains melamine cured type mylar or cured with isocyanates type mylar;
The number-average molecular weight of described mylar is 10000～23000, and the thickness of described the 2nd film layer is 3～30 μ m.
2. precoated metal plate according to claim 1, it is characterized in that: be made as T at the total film thickness with described the 1st film layer and described the 2nd film layer addition, in the time of will being made as Rv at the diameter of the bubble of measuring with the film coated surface vertical direction, in the wide 10mm of section that films arbitrarily, there is the bubble that satisfies Rv 〉=0.8T more than 20, wherein, the unit of T is μ m, and the unit of Rv is μ m.
3. precoated metal plate according to claim 1 and 2, it is characterized in that: described the 1st film layer and described the 2nd film layer contain respectively the pigment with colour system.
4. precoated metal plate according to claim 1 and 2 is characterized in that: to the face of the opposition side of the face of the described gassiness alveolar layer of having of described metallic plate more than 80 ℃ and the frequency of measuring under the set point of temperature below 200 ℃ be 600～3000cm
-1The zone in the infrared ray total emissivity be below 0.50.
5. precoated metal plate according to claim 3 is characterized in that: to the face of the opposition side of the face of the described gassiness alveolar layer of having of described metallic plate more than 80 ℃ and the frequency of measuring under the set point of temperature below 200 ℃ be 600～3000cm
-1The zone in the infrared ray total emissivity be below 0.50.
6. electronic equipment is characterized in that: adopt wantonly 1 described precoated metal plate in claim 1～5 as at least a portion of outside plate, the face with described gassiness alveolar layer is positioned at the exterior side of described outside plate.
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| JP2009-181739 | 2009-08-04 | ||
| JP2009181739 | 2009-08-04 | ||
| PCT/JP2010/063445 WO2011016575A1 (en) | 2009-08-04 | 2010-08-03 | Precoated metal plate |
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| KR (1) | KR101178615B1 (en) |
| CN (1) | CN102470640B (en) |
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| JP7001214B1 (en) * | 2020-07-15 | 2022-01-19 | 日本製鉄株式会社 | Manufacturing method of pre-coated metal plate, burn prevention cover and pre-coated metal plate |
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| JP2957303B2 (en) * | 1991-04-18 | 1999-10-04 | 新日本製鐵株式会社 | Damping steel sheet with excellent workability and its manufacturing method |
| JP3106120B2 (en) * | 1997-05-16 | 2000-11-06 | 三菱電機株式会社 | Portable electronic devices |
| JP3137938B2 (en) * | 1997-12-25 | 2001-02-26 | 三菱電機株式会社 | Portable electronic devices |
| JP2003285001A (en) * | 2002-03-28 | 2003-10-07 | Nisshin Steel Co Ltd | Thermal transfer coated metal plate excellent in light fastness and adhesion with processed part and printing coated metal plate using the same |
| JP4653386B2 (en) * | 2003-04-04 | 2011-03-16 | 新日本製鐵株式会社 | Surface-treated metal plate with excellent heat resistance and casing using the same |
| JP2005193533A (en) * | 2004-01-07 | 2005-07-21 | Nippon Steel Corp | Metal can having thermal insulation effect and its production method |
| JP4918780B2 (en) | 2005-12-15 | 2012-04-18 | 凸版印刷株式会社 | Multilayer wiring board manufacturing method and semiconductor device |
| KR20090054198A (en) * | 2007-11-26 | 2009-05-29 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Method for preparing adhesive sheet and adhesive sheet thereby |
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| KR101178615B1 (en) | 2012-08-30 |
| KR20120036322A (en) | 2012-04-17 |
| MY155681A (en) | 2015-11-13 |
| JP4751489B2 (en) | 2011-08-17 |
| WO2011016575A1 (en) | 2011-02-10 |
| TW201111166A (en) | 2011-04-01 |
| IN2012DN00699A (en) | 2015-06-19 |
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