WO2019187175A1 - Coated metal plate and joiner having same - Google Patents

Coated metal plate and joiner having same Download PDF

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Publication number
WO2019187175A1
WO2019187175A1 PCT/JP2018/020256 JP2018020256W WO2019187175A1 WO 2019187175 A1 WO2019187175 A1 WO 2019187175A1 JP 2018020256 W JP2018020256 W JP 2018020256W WO 2019187175 A1 WO2019187175 A1 WO 2019187175A1
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WO
WIPO (PCT)
Prior art keywords
metal plate
coating layer
coated metal
joiner
vinyl acetate
Prior art date
Application number
PCT/JP2018/020256
Other languages
French (fr)
Japanese (ja)
Inventor
菜穂 河原
牧野　智訓
尾和　克美
Original Assignee
日新製鋼株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日新製鋼株式会社 filed Critical 日新製鋼株式会社
Priority to KR1020207027671A priority Critical patent/KR102660604B1/en
Priority to CN201880087460.9A priority patent/CN111886132B/en
Publication of WO2019187175A1 publication Critical patent/WO2019187175A1/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0889—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements characterised by the joints between neighbouring elements, e.g. with joint fillings or with tongue and groove connections
    • 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
    • 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
    • B32B15/06—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 natural rubber or synthetic rubber
    • 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
    • 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
    • B32B15/085—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 comprising polyolefins
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
    • 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
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/025—Electric or magnetic properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • C09D123/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/12—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements of metal or with an outer layer of metal or enameled metal

Definitions

  • the present invention relates to a coated metal plate and a joiner having the same.
  • Joiners are used at joints between exterior boards in the building exterior.
  • the joiner has a function of holding the exterior board at regular intervals.
  • the joints between the outer wall boards are filled with caulking material to ensure waterproofness and airtightness.
  • caulking material bonded to the side surfaces of the two exterior boards and the joiner, the exterior board expands and contracts in response to changes in the external environment (especially temperature changes). It cannot follow the expansion and contraction of the board, the stress due to the expansion and contraction of the exterior board concentrates on the caulking material, and the caulking material easily breaks.
  • the caulking material is bonded to the side end surfaces of two adjacent exterior boards, but is not bonded to the joiner, that is, two-sided bonding is performed. ing.
  • a method of bonding to two surfaces a method of forming a coating film having low adhesiveness to the caulking material on the surface (the receiving portion of the caulking material) in contact with the caulking material of the joiner has been studied.
  • a joiner (see Patent Document 1) having a coating film containing a specific fluororesin on a surface in contact with a caulking material or a joiner (see Patent Document 2) having a coating film containing low-density polyethylene or polypropylene is disclosed. Yes.
  • the present invention has been made in view of the above circumstances, and provides a coated metal plate capable of maintaining low adhesion to a caulking material even after being left outdoors and a joiner having the same. Objective.
  • the present invention relates to a coated metal plate having the following configuration and a joiner using the same.
  • a volume resistivity measured according to JIS C 2139: 2008 having a metal plate and a resin-containing coating layer disposed on the surface of the metal plate is 1 0.0 ⁇ 10 17 ⁇ ⁇ cm or less and the surface free energy calculated from the Kaelble-Uy equation based on the contact angle measured in accordance with JIS R 3257: 1999 is 36.6 mJ / m 2 or less.
  • the resin is an ethylene / vinyl acetate copolymer or silicone rubber.
  • the resin is an ethylene / vinyl acetate copolymer, and the content ratio of structural units derived from vinyl acetate in the ethylene / vinyl acetate copolymer is the total structure of the ethylene / vinyl acetate copolymer.
  • the joiner includes a ridge portion and a substrate portion connected to a base end portion of the ridge portion, and at least a surface of the ridge portion for supporting the caulking material is provided on the surface.
  • the present invention it is possible to provide a coated metal plate that can maintain non-adhesiveness to a caulking material and a joiner having the same even after being left outdoors.
  • FIG. 1 is a cross-sectional view illustrating a configuration example of a coated metal plate according to the present embodiment.
  • FIG. 2 is a partial perspective view showing an example of the use state of the joiner.
  • 3A and 3B are cross-sectional views of the joiner.
  • ethylene / vinyl acetate copolymer is usually a material that is generally used for sealants and adhesive applications, but when left outdoors, It has been found that dirt is particularly difficult to adhere to the surface of the coating film, and the non-adhesiveness with the caulking material can be maintained well.
  • the present invention has been made based on such knowledge.
  • FIG. 1 is a cross-sectional view showing the configuration of the coated metal plate of the present embodiment.
  • the coated metal plate 10 of the present embodiment includes a metal plate 11 and a coating layer 13 disposed on the surface thereof.
  • the metal plate 11 used as a coating original plate can be suitably selected according to the use of a coating metal plate.
  • the metal plate 11 include galvanized steel sheets, Zn—Al alloy plated steel sheets, Zn—Al—Mg alloy plated steel sheets, aluminum plated steel sheets, etc .; cold-rolled steel sheets, stainless steel sheets (austenitic, martensitic, Steel sheets such as ferritic and ferritic martensite two-phase systems); aluminum plates; aluminum alloy plates; and copper plates.
  • the metal plate 11 is preferably a plated steel plate, and more preferably a hot dip plated steel plate.
  • the plating adhesion amount of the plated steel sheet is not particularly limited, but may be, for example, 30 to 500 g / m 2 .
  • the surface of the metal plate 11 may be subjected to chemical conversion treatment from the viewpoint of enhancing the corrosion resistance and coating film adhesion of the coated steel plate.
  • chemical conversion treatment may be a chromate treatment, a chromium free treatment, and a phosphate treatment.
  • the thickness of the metal plate 11 may be set according to the application and workability, and is not particularly limited. However, for example, from the viewpoint of obtaining workability and mechanical strength required for a joiner, 0.3 to 0.00. It is preferable that it is 6 mm.
  • the chemical conversion treatment can be performed by a known method.
  • the chemical conversion solution may be applied to the surface of the steel sheet by a roll coating method, a spin coating method, a spray method, or the like, and dried without being washed with water.
  • the drying temperature and drying time are not particularly limited as long as moisture can be evaporated. From the viewpoint of productivity, the drying temperature is preferably in the range of 60 to 150 ° C. as the ultimate plate temperature, and the drying time is preferably in the range of 2 to 10 seconds.
  • the adhesion amount of the chemical conversion treatment film is not particularly limited as long as it is within a range effective for improving corrosion resistance and coating film adhesion.
  • the adhesion amount may be adjusted so that the total Cr conversion adhesion amount is 5 to 100 mg / m 2 .
  • the Ti-Mo composite coating has a range of 10 to 500 mg / m 2
  • the fluoroacid-based coating has a fluorine equivalent or total metal element equivalent deposit of 3 to 100 mg / m 2.
  • the adhesion amount may be adjusted.
  • the adhesion amount may be adjusted so as to be 5 to 500 mg / m 2 .
  • the covering layer 13 is a layer (resin layer) containing a resin disposed on at least a part of the surface of the metal plate 11.
  • the coating layer 13 is the outermost layer of the coated metal plate 10.
  • the coating layer 13 is adjusted to have a volume resistivity of 1.0 ⁇ 10 17 ⁇ ⁇ cm or less and a surface free energy of 36.6 mJ / m 2 or less from the viewpoint of maintaining non-adhesiveness with the caulking material. ing.
  • the volume resistivity of the covering layer 13 is 1.0 ⁇ 10 17 ⁇ ⁇ cm or less, the covering layer 13 is difficult to be charged, so that static electricity is not easily generated, and dirt or the like adheres while exposed to the outdoors. Can be difficult.
  • the volume resistivity of the covering layer 13 is more preferably 4.0 ⁇ 10 16 ⁇ ⁇ cm or less.
  • the volume resistivity of the coating layer 13 can be measured in accordance with JIS C 2139: 2008 “Solid Electrical Insulating Material—Method of Measuring Volume Resistivity and Surface Resistivity” (IEC 60093: 1980). Specifically, it can be measured under the following conditions. (Test conditions) Test equipment: Digital ultra-high resistance / micro ammeter 8340A type (manufactured by ADC) Electrode size: Main electrode 50 mm ⁇ , guard electrode inner diameter 60 mm ⁇ , outer diameter 80 mm ⁇ Applied voltage: 100V, 500V (DC) Application time: 60 sec Test environment: temperature 23 ⁇ 2 ° C, humidity 50 ⁇ 5% RH Test specimen dimensions: 100 mm x 100 mm
  • the surface free energy of the coating layer 13 is 36.6 mJ / m 2 or less, the surface of the coating layer 13 has low reactivity, so even if dirt is attached to the coating layer 13 while exposed to the outdoors, Since the reactivity of the surface is low, it is difficult to fix the dirt.
  • the surface free energy of the coating layer 13 is more preferably 34.2 mJ / m 2 or less.
  • the surface free energy of the coating layer 13 can be calculated based on a contact angle measured in accordance with JIS R 3257: 1999 (IEC62073). Specifically, it can be measured by the following procedure. 1) Measure the contact angles of pure water and methylene iodide according to JIS R 3257: 1999 “Testing method for wettability of substrate glass surface”. As the measuring apparatus, a portable contact angle meter PCA-1 (manufactured by Kyowa Interface Science Co., Ltd.) can be used.
  • the volume resistivity and surface free energy of the coating layer 13 can be adjusted by the composition of the coating layer 13, particularly the type of resin.
  • the resin constituting the coating layer 13 is not particularly limited as long as the volume resistivity and surface free energy satisfy the above ranges, and may be ethylene / vinyl acetate copolymer, silicone rubber, or the like.
  • the ethylene / vinyl acetate copolymer includes a structural unit derived from ethylene and a structural unit derived from vinyl acetate.
  • the content ratio of the structural unit derived from vinyl acetate may be such that it does not exhibit adhesiveness and low chargeability is obtained, and is 5 mass% with respect to all structural units constituting the ethylene / vinyl acetate copolymer.
  • the content is preferably less than 20% by mass.
  • the content ratio of the structural unit derived from vinyl acetate is 5% by mass or more, a low volume resistivity is easily obtained, so that low chargeability is easily obtained, and dirt can be hardly adhered to the surface of the coating layer 13.
  • the content ratio of the structural unit derived from vinyl acetate is 20% by mass or less, the tackiness is hardly expressed, and thus the surface of the coating layer 13 can be hardly adhered.
  • the content ratio of the structural units derived from vinyl acetate is more preferably 5 to 17% by mass with respect to all the structural units constituting the ethylene / vinyl acetate copolymer.
  • the ethylene / vinyl acetate copolymer may further contain structural units derived from monomers other than ethylene and vinyl acetate.
  • monomers other than ethylene and vinyl acetate.
  • examples of other monomers include 3 carbon atoms such as propylene, 1-butene, 3-methyl-1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene and 1-decene. -20 ⁇ -olefins, (meth) acrylic acid, (meth) acrylic acid esters, and styrene.
  • the content ratio of the structural units derived from other monomers is preferably 10% by mass or less, and more preferably 0% by mass with respect to all the structural units constituting the ethylene / vinyl acetate copolymer.
  • the melt flow rate (JIS K7210-1999, 190 ° C., 2160 g load) of the ethylene / vinyl acetate copolymer is preferably 1 to 20 g / 10 min.
  • the MFR of the ethylene / vinyl acetate copolymer is more preferably 5 to 15 g / 10 min.
  • the silicone rubber is not particularly limited, and may be a cured product of an addition reaction curing type or condensation curing type silicone rubber composition.
  • a cured product of an addition reaction curable silicone rubber composition is a silicone rubber composition comprising a polyorganosiloxane having two or more alkenyl groups (preferably vinyl groups) in one molecule as a crosslinkable reactive group, and a curing agent. Can be obtained by curing (addition curing).
  • the polyorganosiloxane having two or more alkenyl groups (preferably vinyl groups) in one molecule as a crosslinkable reactive group is preferably an organopolysiloxane represented by the following formula (1).
  • R n SiO (4-n) / 2 (1)
  • R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms.
  • at least two of the plurality of R are alkenyl groups (preferably vinyl groups).
  • the monovalent hydrocarbon group include an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an aryl group, an aralkyl group, and at least a part of the hydrogen atoms of these groups are halogen atoms.
  • a methyl group, a vinyl group, a phenyl group, or a trifluoropropyl group and more preferably a methyl group.
  • R may mutually be the same and may differ.
  • n is a positive number from 1.95 to 2.05.
  • the curing agent can be an addition reaction curing agent.
  • the addition reaction curing agent can be a silane compound such as an organohydrogenpolysiloxane.
  • the silicone rubber composition may further contain a reaction catalyst, silicone oil and the like as necessary.
  • the reaction catalyst includes platinum-based catalysts such as platinum metal particles, platinous chloride, and chloroplatinic acid.
  • Silicone oils are liquid silicone oils with polyorganosiloxane as the main skeleton. Examples include dimethyl silicone oils that have only methyl groups as organo groups; some methyl groups are phenyl groups, vinyl groups, alkyl groups. Modified silicone oils substituted with groups, aralkyl groups, amino groups, carboxyl groups, epoxy groups, hydroxyl groups, polyoxyalkylene groups and the like are included. The total amount of these components may be 10% by mass or less based on the total solid content of the silicone rubber composition.
  • a cured product of the condensation curable silicone rubber composition comprises a polydiorganopolysiloxane having two or more silicon atoms bonded to a hydroxyl group in one molecule, a silane compound having three or more condensable functional groups in one molecule, It can be obtained by curing (condensation curing) a silicone rubber composition containing a condensation catalyst.
  • the organic group bonded to the Si atom is an alkyl group such as a methyl group or an ethyl group; an aryl group such as a phenyl group or a tolyl group; Included are diorganopolysiloxanes that are cycloalkyl groups such as cyclohexyl groups.
  • the silane compound is a polyfunctional silane compound having a hydrolyzable group, and is preferably a silane compound represented by the following general formula (2).
  • R 1 represents a methyl group, a vinyl group or a phenyl group.
  • X represents an alkoxy group having 1 to 5 carbon atoms, a methyl ethyl ketoxime group, a propenyloxy group or an acetoxy group.
  • N represents 3 or 4. However, when m is 0, n is 4, and when m is 1, n is 3.
  • condensation catalyst examples include titanium compounds such as tetraisopropoxy titanium and tetra-n-butoxy titanium.
  • silicone rubber composition examples include S coat 57 manufactured by Shin-Etsu Chemical Co., Ltd.
  • the resin constituting the coating layer 13 is preferably an ethylene / vinyl acetate copolymer because non-adhesiveness to the caulking material is easily obtained.
  • composition of the coating layer 13 is not limited to these.
  • the resin has a volume resistivity not satisfying the above range (for example, polyethylene or polypropylene)
  • the volume resistivity and the surface free energy as the whole coating layer 13 are combined with a conductive material such as carbon black. The range may be satisfied.
  • the coating layer 13 may further include other components than the above-mentioned resin as long as the effects of the present invention are not impaired.
  • other components include coloring pigments, extender pigments, and aggregates.
  • coloring pigments include inorganic pigments such as titanium oxide, calcium carbonate, carbon black, iron black, titanium yellow, bengara, bitumen, cobalt blue, cerulean blue, ultramarine blue, cobalt green, and molybdenum red; CoAl, CoCrAl, CoCrZnMgAl, Composite oxide calcined pigments containing metallic components such as CoNiZnTi, CoCrZnTi, NiSbTi, CrSbTi, FeCrZnNi, MnSbTi, FeCr, FeCrNi, FeNi, FeCrNiMn, CoCr, Mn, Co, SnZnTi; Metallic pigments such as Al, resin-coated Al, Ni ; And Resol Red B, Brilliant Scarlet G, Pigment Scarlet 3B, Brilliant Carmine 6B, Lake Red C, Lake Red D, Permanentre 4R, Bordeaux 10B, Fast Yellow G, Fast Yellow 10G, Para Red, Watching Red,
  • extender pigments include barium sulfate, titanium oxide, silica, and calcium carbonate.
  • aggregates include resin particles and inorganic particles made of inorganic compounds such as glass, silicon carbide, boron nitride, zirconia, alumina, and silica.
  • silicone rubber silicone oil etc. may be contained as another component. The total amount of these other components may be 10% by mass or less with respect to the coating layer 13.
  • the thickness of the coating layer 13 is not particularly limited as long as it can maintain non-adhesiveness to the caulking material when used as a joiner, but is preferably 3 to 120 ⁇ m.
  • the thickness of the coating layer 13 is 3 ⁇ m or more, when used as a joiner, it is easy to maintain good non-adhesiveness to the caulking material, and when it is 120 ⁇ m or less, for example, when the coating layer 13 is formed by coating, It is easy to suppress the appearance defect of the coated metal plate 10 due to the occurrence of cracks during drying.
  • the thickness of the covering layer 13 is more preferably 5 to 100 ⁇ m from the above viewpoint.
  • the coated metal plate 10 of the present invention may further include another layer (not shown) such as an undercoat coating film or an adhesive layer between the metal plate 11 and the coating layer 13 as necessary.
  • the undercoat film can be disposed on the surface of the metal plate or the chemical conversion film.
  • the undercoat coating film can improve the adhesion of the coating layer and the corrosion resistance of the coated metal plate.
  • the type of resin (base resin) constituting the undercoat coating film is not particularly limited.
  • the resin constituting the undercoat coating include epoxy resin, acrylic resin, and polyester resin.
  • the undercoat coating film may further contain an aggregate, a rust preventive pigment, and the like as necessary.
  • Such an undercoat coating film can be formed by applying an undercoat paint on a metal plate and baking at 200 to 250 ° C. for 30 to 120 seconds.
  • the adhesive layer is not particularly limited, but may be a cured product of a thermosetting adhesive such as a melamine adhesive or an epoxy adhesive, or various elastomer adhesives.
  • the manufacturing method of a covering metal plate The covering metal plate of this invention can be manufactured by arbitrary methods.
  • the coated metal plate 10 of the present invention may be obtained, for example, by laminating a film as a resin composition for a coating layer on the metal plate 11 and then forming the coating layer 13 by thermocompression bonding (thermal lamination). (The thermocompression bonding method); the film may be laminated on the metal plate 11 via an adhesive to form the coating layer 13 (adhesion method); the coating layer on the metal plate 11 It may be obtained by casting a melt of the resin composition for cooling and then forming the coating layer 13 by cooling (extrusion casting method); coating the resin composition for the coating layer on the metal plate 11 Thereafter, the coating layer 13 may be formed by drying or heating (coating method).
  • the coating layer 13 containing an ethylene / vinyl acetate copolymer is formed by thermocompression bonding a film containing an ethylene / vinyl acetate copolymer on the metal plate 11 (thermocompression bonding method), or ethylene / vinyl acetate copolymer. After melt-casting the resin composition for coating layer containing the coalescence, it can be formed by cooling (extrusion casting method).
  • the thermocompression bonding conditions in the thermocompression bonding method are not particularly limited, but may be, for example, 100 to 200 ° C.
  • the coating layer 13 containing silicone rubber can be formed by applying a resin composition for a coating layer containing the above-mentioned silicone-based coating composition on the metal plate 11 and then drying at room temperature or curing by heating.
  • the coating method of the resin composition for coating layers is not specifically limited, For example, a roll coat method, a flow coat method, a curtain flow method, and a spray method may be used.
  • the heat curing conditions may be such that the reaction-curable silicone rubber in the coating layer resin composition is sufficiently cured, and may be, for example, 25 to 300 ° C.
  • the coating layer 13 may be disposed on the entire surface of the metal plate 11, or only a portion (a top surface 21 ⁇ / b> A of the ridge portion 21, which will be described later) serving as a receiving portion for the caulking material when the joiner 20 is described later. May be arranged.
  • Such a coated metal plate can be preferably used, for example, as a coated metal plate for a joiner.
  • joiner of the present invention is a joiner (joint material) for being arranged at a joint portion of an adjacent exterior material, and includes the coated metal plate of the present invention.
  • FIG. 2 is a partial perspective view showing an example of the use state of the joiner 20.
  • 3A and 3B are cross-sectional views illustrating a configuration example of the joiner 20.
  • the joiner 20 has a covered metal plate 10 having a hat-shaped cross section. Such a joiner 20 is also referred to as a hat joiner.
  • the joiner 20 has a ridge portion 21 and two substrate portions 23 connected to the base end portion of the ridge portion 21.
  • the ridge portion 21 is disposed on the joint portion 30 of the building exterior and can support the caulking material 40 (can be a receiving portion of the caulking material 40).
  • substrate parts 23 can hold
  • the covering layer 13 should just be arrange
  • the coating layer 13 may be disposed on the entire surface of the joiner 20 (see FIG. 3A), or may be disposed only on the surface (top surface) 21A that supports the caulking material of the ridge portion 21. (See FIG. 3B).
  • Joiner 20 can be manufactured by any method.
  • the joiner 20 may be obtained by molding the coated metal plate 10 having the metal plate 11 and the coating layer 13 described above by pressing or the like;
  • the covering layer 13 may be formed on the top surface 21A of the strip 21.
  • compositions of films 1 to 7 are shown in Table 1.
  • melt flow rate (JIS K7210-1999, 190 ° C., 2160 g load) of the film 3 was 9.0 g / 10 minutes.
  • Film 8-13 Film 8: Polystyrene film (PS) (Asahi Kasei Chemicals, OPS (registered trademark) film, thickness 50 ⁇ m) Film 9: High-density polyethylene film (HDPE) (manufactured by Nitto L Material, polyethylene masker, thickness 10 ⁇ m) Film 10: Polyvinylidene chloride film (PVdC) (Asahi Kasei Corporation, Saran (registered trademark) UB, thickness 25 ⁇ m) Film 11: Polypropylene film (PP) (manufactured by Toray Film Processing Co., Ltd., Treffan (registered trademark) NO, thickness 50 ⁇ m) Film 12: Polymethyl methacrylate film (PMMA) (manufactured by Mitsubishi Chemical Co., Ltd., Acryprene TM, thickness 50 ⁇ m) Film 13: Polycarbonate film (PC) (manufactured by Teijin Limited, Pure Ace (registered trademark), thickness 100 ⁇
  • Paint 1 Silicone paint (Shin-Etsu Chemical Co., silicone rubber S coat 57)
  • Paint 2 Silicone paint (Shin-Etsu Chemical Co., Ltd., silicone resin KR-300)
  • Paint 3 Epoxy resin paint (Nippe Power Bind made by Nippon Paint Industrial Coatings Co., Ltd.)
  • Coated metal plates 6, 12, and 14 were obtained in the same manner as the coated metal plate 1 except that the ethylene / vinyl acetate copolymer film 1 was changed to the film shown in Table 2.
  • the thermal lamination was performed at the glass transition temperature (Tg) of the resin + 40 ° C., and the heating in the oven was performed at the glass transition temperature (Tg) of the resin + 80 ° C.
  • the volume resistivity and surface free energy of the coating layer were measured by the following methods.
  • the non-adhesiveness of the coated metal plates 1 to 16 after exposure to the caulking material was measured by the following method.
  • Non-adhesiveness to caulking material The obtained coated metal plate was exposed to the outdoors for 2 weeks with an exposure angle of 35 degrees and an installation direction facing south according to JIS Z 2381.
  • a primer for caulking material was applied to the coated metal plate after outdoor exposure with a brush and dried at room temperature for 30 minutes.
  • a caulking material was applied to the surface of the primer and dried at room temperature for 1 week. The dried caulking material was peeled off from the coated metal plate by hand, and those that were easily peeled were evaluated as “ ⁇ ”, and those that did not peel were evaluated as “x”.
  • the caulking material As the caulking material, a one-component modified silicone caulking material (SR seal S70; Sunrise MSI Co., Ltd.) or a urethane caulking material (FC700; Nichiha Corp.) was used.
  • the primer was applied in order to make the conditions close to the actual construction conditions in consideration of the fact that the primer is often applied unintentionally to the surface that will receive the caulking material during actual construction. It is.
  • coated metal plates 1 to 5 having a coating layer having a volume resistivity of 1.0 ⁇ 10 17 ⁇ ⁇ cm or less and a surface free energy of 36.6 mJ / m 2 or less are as follows: It can be seen that the non-adhesiveness after exposure is good for both the urethane-based caulking material and the silicone-based caulking material.
  • coated metal plates 6 to 16 having a coating layer in which at least one of volume resistivity and surface free energy is outside the scope of the present application are exposed to both urethane-based caulking materials and silicone-based caulking materials. It can be seen that the subsequent non-adhesiveness is low.
  • a coated metal plate that maintains non-adhesiveness to a caulking material even after being left outdoors.
  • Such a coated metal plate can favorably maintain non-adhesiveness to the caulking material and is suitable as a joiner that can suppress three-sided adhesion.

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Abstract

The purpose of the present invention is to provide a coated metal plate that can maintain non-adhesiveness with respect to caulking material even after being left outside. The coated metal plate according to the present invention comprises: a metal plate; and a coating layer arranged on a surface of the metal plate and containing a resin. The coating layer has a volume resistivity of 1.0 × 1017 Ω·cm or less as measured in conformity with JIS C 2139: 2008, and has a surface free energy of 36.6 mJ/m2 or less as calculated on the basis of a contact angle measured in conformity with JIS R 3257: 1999.

Description

被覆金属板およびそれを有するジョイナーCoated metal plate and joiner having the same
　本発明は、被覆金属板およびそれを有するジョイナーに関する。 The present invention relates to a coated metal plate and a joiner having the same.
　ジョイナーは、建物外装における外装ボード間の目地部に用いられる。ジョイナーは、外装ボードを一定の間隔で保持する機能を有する。 Joiners are used at joints between exterior boards in the building exterior. The joiner has a function of holding the exterior board at regular intervals.
　外壁ボード間の目地部には、防水性および気密性を担保するために、コーキング材が充填される。このとき、コーキング材が、２つの外装ボードの側端面と、ジョイナーとに三面接着していると、外装ボードは、外部環境の変化（特に温度変化）に応じて伸縮するため、コーキング材が外装ボードの伸縮に追従することができず、外装ボードの伸縮による応力がコーキング材に集中し、コーキング材が破断しやすくなる。 The joints between the outer wall boards are filled with caulking material to ensure waterproofness and airtightness. At this time, if the caulking material is bonded to the side surfaces of the two exterior boards and the joiner, the exterior board expands and contracts in response to changes in the external environment (especially temperature changes). It cannot follow the expansion and contraction of the board, the stress due to the expansion and contraction of the exterior board concentrates on the caulking material, and the caulking material easily breaks.
　そのような問題をなくすために、コーキング材が、隣り合う２つの外装ボードの側端面とは接着しつつも、ジョイナーとは接着しないようにすること、すなわち、二面接着にすることが行われている。 In order to eliminate such a problem, the caulking material is bonded to the side end surfaces of two adjacent exterior boards, but is not bonded to the joiner, that is, two-sided bonding is performed. ing.
　二面接着にする方法として、ジョイナーのコーキング材と接する面（コーキング材の受け部）に、コーキング材に対して接着性の低い塗膜を形成する方法が検討されている。例えば、コーキング材と接する面に、特定のフッ素樹脂を含む塗膜を有するジョイナー（特許文献１参照）や、低密度ポリエチレンやポリプロピレンを含む塗膜を有するジョイナー（特許文献２参照）が開示されている。 As a method of bonding to two surfaces, a method of forming a coating film having low adhesiveness to the caulking material on the surface (the receiving portion of the caulking material) in contact with the caulking material of the joiner has been studied. For example, a joiner (see Patent Document 1) having a coating film containing a specific fluororesin on a surface in contact with a caulking material or a joiner (see Patent Document 2) having a coating film containing low-density polyethylene or polypropylene is disclosed. Yes.
特開２００９－６２７０７号公報JP 2009-62707 A 特開２００４－６８４６４号公報JP 2004-68464 A
　ところで、ジョイナーは、施工現場に搬入された後、建物外装を施工するまでの間、屋外に放置されることがある。その間に、ジョイナーのコーキング材と接する面が、コーキング材と接着しやすくなり、建物外装を施工した際に、三面接着を生じるという問題があった。特許文献１や２に示されるジョイナーにおいても、同様の問題があった。 By the way, a joiner may be left outdoors after it is brought into the construction site and before the building exterior is constructed. In the meantime, the surface of the joiner that contacts the caulking material becomes easy to adhere to the caulking material, and there has been a problem that three-sided adhesion occurs when the building exterior is constructed. The joiners disclosed in Patent Documents 1 and 2 have the same problem.
　本発明は、上記事情に鑑みてなされたものであり、屋外に放置した後であっても、コーキング材に対して低い接着性を維持しうる被覆金属板およびそれを有するジョイナーを提供することを目的とする。 The present invention has been made in view of the above circumstances, and provides a coated metal plate capable of maintaining low adhesion to a caulking material even after being left outdoors and a joiner having the same. Objective.
　本発明は、以下の構成の被覆金属板およびそれを用いたジョイナーに関する。
　［１］　金属板と、前記金属板の表面に配置された、樹脂を含む被覆層と、を有し、前記被覆層の、ＪＩＳ Ｃ ２１３９：２００８に準拠して測定される体積抵抗率が１．０×１０１７Ω・ｃｍ以下であり、かつＪＩＳ Ｒ ３２５７：１９９９に準拠して測定される接触角に基づいてＫａｅｌｂｌｅ－Ｕｙ式から算出される表面自由エネルギーが３６．６ｍＪ／ｍ２以下である、被覆金属板。
　［２］　前記樹脂は、エチレン・酢酸ビニル共重合体またはシリコーンゴムである、［１］に記載の被覆金属板。
　［３］　前記樹脂は、エチレン・酢酸ビニル共重合体であり、前記エチレン・酢酸ビニル共重合体の酢酸ビニル由来の構造単位の含有比率は、前記エチレン・酢酸ビニル共重合体を構成する全構造単位に対して５質量％以上２０質量％未満である、［２］に記載の被覆金属板。
　［４］　前記被覆層の厚みは、３～１２０μｍである、［１］～［３］のいずれかに記載の被覆金属板。
　［５］　前記金属板は、前記被覆層が配置される面に配置された化成処理皮膜を有する、［１］～［４］のいずれかに記載の被覆金属板。
　［６］　隣り合う外装材の目地部に配置されるための、［１］～［５］のいずれかに記載の被覆金属板を有する、ジョイナー。
　［７］　前記ジョイナーは、凸条部と、前記凸条部の基端部と接続された基板部と、を有し、前記凸条部のうち少なくとも前記コーキング材を支持するための面には、前記被覆層が配置されている、［６］に記載のジョイナー。 The present invention relates to a coated metal plate having the following configuration and a joiner using the same.
[1] A volume resistivity measured according to JIS C 2139: 2008 having a metal plate and a resin-containing coating layer disposed on the surface of the metal plate is 1 0.0 × 10 17 Ω · cm or less and the surface free energy calculated from the Kaelble-Uy equation based on the contact angle measured in accordance with JIS R 3257: 1999 is 36.6 mJ / m 2 or less. There is a coated metal plate.
[2] The coated metal plate according to [1], wherein the resin is an ethylene / vinyl acetate copolymer or silicone rubber.
[3] The resin is an ethylene / vinyl acetate copolymer, and the content ratio of structural units derived from vinyl acetate in the ethylene / vinyl acetate copolymer is the total structure of the ethylene / vinyl acetate copolymer. The coated metal plate according to [2], which is 5% by mass or more and less than 20% by mass with respect to a unit.
[4] The coated metal plate according to any one of [1] to [3], wherein the coating layer has a thickness of 3 to 120 μm.
[5] The coated metal plate according to any one of [1] to [4], wherein the metal plate has a chemical conversion treatment film disposed on a surface on which the coating layer is disposed.
[6] A joiner having the coated metal plate according to any one of [1] to [5], which is disposed on a joint portion between adjacent exterior materials.
[7] The joiner includes a ridge portion and a substrate portion connected to a base end portion of the ridge portion, and at least a surface of the ridge portion for supporting the caulking material is provided on the surface. The joiner according to [6], wherein the coating layer is disposed.
　本発明によれば、屋外に放置した後であっても、コーキング材に対する非接着性を維持しうる被覆金属板およびそれを有するジョイナーを提供することができる。 According to the present invention, it is possible to provide a coated metal plate that can maintain non-adhesiveness to a caulking material and a joiner having the same even after being left outdoors.
図１は、本実施の形態の被覆金属板の構成例を示す断面図である。FIG. 1 is a cross-sectional view illustrating a configuration example of a coated metal plate according to the present embodiment. 図２は、ジョイナーの使用状態の一例を示す部分斜視図である。FIG. 2 is a partial perspective view showing an example of the use state of the joiner. 図３ＡおよびＢは、ジョイナーの断面図である。3A and 3B are cross-sectional views of the joiner.
　本発明者らは、特許文献１や２に示されるような従来のジョイナーが、屋外に放置した後にコーキング材に対して接着しやすくなる理由を分析および検討したところ、詳細は明らかではないものの、以下のような現象が生じているのではないかと推察した。 The present inventors analyzed and examined the reason why conventional joiners such as those shown in Patent Documents 1 and 2 easily adhere to caulking materials after being left outdoors, although details are not clear, I guessed the following phenomenon might have occurred.
　すなわち、ジョイナーを屋外に放置している間に、ジョイナー表面の塗膜に、塵や埃などの汚れが付着（飛来）し、屋外の光や水分、熱などによりその汚れが固着すると考えられる。そして、固着した汚れが起点となり、コーキング材が接着しやすくなると考えられる。 That is, while the Joiner is left outdoors, dirt such as dust and dust adheres (fly) to the paint film on the Joiner surface, and it is considered that the dirt adheres due to outdoor light, moisture, heat, and the like. Then, it is considered that the adhered dirt becomes a starting point and the caulking material is easily bonded.
　つまり、コーキング材に対する非接着性を維持するためには、汚れが固着しにくい表面状態を維持することが有効であり、そのためには、１）塗膜表面の帯電性を低くし、かつ２）塗膜表面の表面エネルギーを低くすることが有効であると考えられる。そして、本発明者らは、種々の材料について検討した結果、具体的には、１）ＪＩＳ Ｃ ２１３９：２００８に準拠して測定される体積抵抗率が１．０×１０１７Ω・ｃｍ以下であり、かつ２）接触角に基づいてＫａｅｌｂｌｅ－Ｕｙ式から算出される表面自由エネルギーが３６．６ｍＪ／ｍ２以下であると、汚れが固着しにくく、コーキング材との非接着性を維持しうることを見出した。 In other words, in order to maintain the non-adhesiveness to the caulking material, it is effective to maintain a surface state in which dirt is difficult to adhere. For this purpose, 1) the charging property of the coating film surface is lowered, and 2) It is considered effective to lower the surface energy of the coating surface. And as a result of examining the various materials, the present inventors, specifically, 1) The volume resistivity measured in accordance with JIS C 2139: 2008 is 1.0 × 10 17 Ω · cm or less. Yes, and 2) When the surface free energy calculated from the Kaelble-Uy equation based on the contact angle is 36.6 mJ / m 2 or less, dirt is difficult to adhere and non-adhesiveness with the caulking material can be maintained. I found out.
　さらに、これらの物性を満たす材料のうち、エチレン・酢酸ビニル共重合体は、通常、封止剤や接着用途などに一般的に用いられる材料であるにも係わらず、屋外に放置した際に、塗膜の表面に汚れが特に固着しにくく、コーキング材との非接着性を良好に維持できることを見出した。本発明は、このような知見に基づいてなされたものである。 Furthermore, among materials that satisfy these physical properties, ethylene / vinyl acetate copolymer is usually a material that is generally used for sealants and adhesive applications, but when left outdoors, It has been found that dirt is particularly difficult to adhere to the surface of the coating film, and the non-adhesiveness with the caulking material can be maintained well. The present invention has been made based on such knowledge.
　以下、本発明の実施の形態について、図を参照しながら詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
　１．被覆金属板
　図１は、本実施の形態の被覆金属板の構成を示す断面図である。 1. Coated Metal Plate FIG. 1 is a cross-sectional view showing the configuration of the coated metal plate of the present embodiment.
　図１に示されるように、本実施の形態の被覆金属板１０は、金属板１１と、その表面に配置された被覆層１３とを有する。 As shown in FIG. 1, the coated metal plate 10 of the present embodiment includes a metal plate 11 and a coating layer 13 disposed on the surface thereof.
　（金属板１１）
　塗装原板となる金属板１１は、塗装金属板の用途に応じて適宜選択することができる。金属板１１の例には、亜鉛めっき鋼板、Ｚｎ－Ａｌ合金めっき鋼板、Ｚｎ－Ａｌ－Ｍｇ合金めっき鋼板、アルミニウムめっき鋼板などのめっき鋼板；冷延鋼板、ステンレス鋼板（オーステナイト系、マルテンサイト系、フェライト系、フェライト・マルテンサイト二相系を含む）などの鋼板；アルミニウム板；アルミニウム合金板；および銅板が含まれる。なかでも、耐食性を高める観点から、金属板１１は、めっき鋼板であることが好ましく、溶融めっき鋼板であることがより好ましい。めっき鋼板のめっき付着量は、特に制限されないが、例えば３０～５００ｇ／ｍ２でありうる。 (Metal plate 11)
The metal plate 11 used as a coating original plate can be suitably selected according to the use of a coating metal plate. Examples of the metal plate 11 include galvanized steel sheets, Zn—Al alloy plated steel sheets, Zn—Al—Mg alloy plated steel sheets, aluminum plated steel sheets, etc .; cold-rolled steel sheets, stainless steel sheets (austenitic, martensitic, Steel sheets such as ferritic and ferritic martensite two-phase systems); aluminum plates; aluminum alloy plates; and copper plates. Especially, from a viewpoint of improving corrosion resistance, the metal plate 11 is preferably a plated steel plate, and more preferably a hot dip plated steel plate. The plating adhesion amount of the plated steel sheet is not particularly limited, but may be, for example, 30 to 500 g / m 2 .
　金属板１１は、塗装鋼板の耐食性および塗膜密着性を高める観点から、その表面には、化成処理が施されていてもよい。化成処理の種類は、特に限定されないが、例えばクロメート処理、クロムフリー処理、リン酸塩処理でありうる。 The surface of the metal plate 11 may be subjected to chemical conversion treatment from the viewpoint of enhancing the corrosion resistance and coating film adhesion of the coated steel plate. Although the kind of chemical conversion treatment is not specifically limited, For example, it may be a chromate treatment, a chromium free treatment, and a phosphate treatment.
　金属板１１の厚みは、用途や加工性に応じて設定されればよく、特に制限されないが、例えばジョイナーとする際に必要な加工性や機械的強度を得る観点から、０．３～０．６ｍｍであることが好ましい。 The thickness of the metal plate 11 may be set according to the application and workability, and is not particularly limited. However, for example, from the viewpoint of obtaining workability and mechanical strength required for a joiner, 0.3 to 0.00. It is preferable that it is 6 mm.
　化成処理は、公知の方法で実施されうる。例えば、化成処理液をロールコート法、スピンコート法、スプレー法などの方法で鋼板の表面に塗布し、水洗せずに乾燥させればよい。乾燥温度および乾燥時間は、水分を蒸発させることができれば特に限定されない。生産性の観点からは、乾燥温度は、到達板温で６０～１５０℃の範囲内が好ましく、乾燥時間は、２～１０秒の範囲内が好ましい。化成処理皮膜の付着量は、耐食性および塗膜密着性の向上に有効な範囲内であれば特に限定されない。例えば、クロメート皮膜の場合、全Ｃｒ換算付着量が５～１００ｍｇ／ｍ２となるように付着量を調整すればよい。また、クロムフリー皮膜の場合、Ｔｉ－Ｍｏ複合皮膜では１０～５００ｍｇ／ｍ２、フルオロアシッド系皮膜ではフッ素換算付着量または総金属元素換算付着量が３～１００ｍｇ／ｍ２の範囲内となるように付着量を調整すればよい。また、リン酸塩皮膜の場合、５～５００ｍｇ／ｍ２となるように付着量を調整すればよい。 The chemical conversion treatment can be performed by a known method. For example, the chemical conversion solution may be applied to the surface of the steel sheet by a roll coating method, a spin coating method, a spray method, or the like, and dried without being washed with water. The drying temperature and drying time are not particularly limited as long as moisture can be evaporated. From the viewpoint of productivity, the drying temperature is preferably in the range of 60 to 150 ° C. as the ultimate plate temperature, and the drying time is preferably in the range of 2 to 10 seconds. The adhesion amount of the chemical conversion treatment film is not particularly limited as long as it is within a range effective for improving corrosion resistance and coating film adhesion. For example, in the case of a chromate film, the adhesion amount may be adjusted so that the total Cr conversion adhesion amount is 5 to 100 mg / m 2 . In the case of a chromium-free coating, the Ti-Mo composite coating has a range of 10 to 500 mg / m 2 , and the fluoroacid-based coating has a fluorine equivalent or total metal element equivalent deposit of 3 to 100 mg / m 2. The adhesion amount may be adjusted. In the case of a phosphate film, the adhesion amount may be adjusted so as to be 5 to 500 mg / m 2 .
　（被覆層１３）
　被覆層１３は、金属板１１の表面の少なくとも一部に配置された、樹脂を含む層（樹脂層）である。被覆層１３は、被覆金属板１０の最表層となる。被覆層１３は、コーキング材との非接着性を維持する観点から、体積抵抗率が１．０×１０１７Ω・ｃｍ以下であり、かつ表面自由エネルギーが３６．６ｍＪ／ｍ２以下に調整されている。 (Coating layer 13)
The covering layer 13 is a layer (resin layer) containing a resin disposed on at least a part of the surface of the metal plate 11. The coating layer 13 is the outermost layer of the coated metal plate 10. The coating layer 13 is adjusted to have a volume resistivity of 1.0 × 10 17 Ω · cm or less and a surface free energy of 36.6 mJ / m 2 or less from the viewpoint of maintaining non-adhesiveness with the caulking material. ing.
　被覆層１３の体積抵抗率が１．０×１０１７Ω・ｃｍ以下であると、被覆層１３が帯電しにくいため、静電気などを生じにくく、屋外に暴露している間に汚れなどを付着しにくくしうる。被覆層１３の体積抵抗率は、４．０×１０１６Ω・ｃｍ以下であることがより好ましい。 When the volume resistivity of the covering layer 13 is 1.0 × 10 17 Ω · cm or less, the covering layer 13 is difficult to be charged, so that static electricity is not easily generated, and dirt or the like adheres while exposed to the outdoors. Can be difficult. The volume resistivity of the covering layer 13 is more preferably 4.0 × 10 16 Ω · cm or less.
　被覆層１３の体積抵抗率は、ＪＩＳ Ｃ ２１３９：２００８「固体電気絶縁材料－体積抵抗率および表面抵抗率の測定方法」（ＩＥＣ ６００９３：１９８０）に準拠して測定することができる。具体的には、以下の条件で測定することができる。
　（試験条件）
　試験装置：デジタル超高抵抗／微少電流計８３４０Ａ型（エーディーシー社製）
　電極サイズ：主電極５０ｍｍφ、ガード電極内径６０ｍｍφ、外径８０ｍｍφ
　印加電圧：１００Ｖ、５００Ｖ（ＤＣ）
　印加時間：６０ｓｅｃ
　試験環境：温度２３±２℃、湿度５０±５％ＲＨ
　試験片寸法：１００ｍｍ×１００ｍｍ The volume resistivity of the coating layer 13 can be measured in accordance with JIS C 2139: 2008 “Solid Electrical Insulating Material—Method of Measuring Volume Resistivity and Surface Resistivity” (IEC 60093: 1980). Specifically, it can be measured under the following conditions.
(Test conditions)
Test equipment: Digital ultra-high resistance / micro ammeter 8340A type (manufactured by ADC)
Electrode size: Main electrode 50 mmφ, guard electrode inner diameter 60 mmφ, outer diameter 80 mmφ
Applied voltage: 100V, 500V (DC)
Application time: 60 sec
Test environment: temperature 23 ± 2 ° C, humidity 50 ± 5% RH
Test specimen dimensions: 100 mm x 100 mm
　被覆層１３の表面自由エネルギーが３６．６ｍＪ／ｍ２以下であると、被覆層１３の表面の反応性が低いため、屋外に暴露している間に被覆層１３に汚れが付着しても、表面の反応性が低いため、汚れを固着しにくくしうる。被覆層１３の表面自由エネルギーは、３４．２ｍＪ／ｍ２以下であることがより好ましい。 If the surface free energy of the coating layer 13 is 36.6 mJ / m 2 or less, the surface of the coating layer 13 has low reactivity, so even if dirt is attached to the coating layer 13 while exposed to the outdoors, Since the reactivity of the surface is low, it is difficult to fix the dirt. The surface free energy of the coating layer 13 is more preferably 34.2 mJ / m 2 or less.
　被覆層１３の表面自由エネルギーは、ＪＩＳ Ｒ ３２５７：１９９９（ＩＥＣ６２０７３）に準拠して測定される接触角に基づいて算出することができる。具体的には、以下の手順で測定することができる。
　１）ＪＩＳ Ｒ ３２５７：１９９９「基板ガラスの表面のぬれ性試験方法」に準拠し、純水およびヨウ化メチレンの接触角を測定する。測定装置は、ポータブル接触角計ＰＣＡ－１（協和界面科学社製）を用いることができる。
　２）得られた接触角の値を用いて、Ｋａｅｌｂｌｅ－Ｕｙ式（γｓ＝γｓｄ＋γｓｐ、γｓｄ：表面自由エネルギーの分散成分、γｓｐ：表面自由エネルギーの極性成分）から表面自由エネルギーを算出する。 The surface free energy of the coating layer 13 can be calculated based on a contact angle measured in accordance with JIS R 3257: 1999 (IEC62073). Specifically, it can be measured by the following procedure.
1) Measure the contact angles of pure water and methylene iodide according to JIS R 3257: 1999 “Testing method for wettability of substrate glass surface”. As the measuring apparatus, a portable contact angle meter PCA-1 (manufactured by Kyowa Interface Science Co., Ltd.) can be used.
2) The surface free energy is calculated from the Kaelble-Uy equation (γs = γs d + γs p , γs d : dispersion component of surface free energy, γs p : polar component of surface free energy) using the obtained contact angle value. calculate.
　被覆層１３の体積抵抗率および表面自由エネルギーは、被覆層１３の組成、特に樹脂の種類によって調整することができる。 The volume resistivity and surface free energy of the coating layer 13 can be adjusted by the composition of the coating layer 13, particularly the type of resin.
　被覆層１３を構成する樹脂は、体積抵抗率および表面自由エネルギーが上記の範囲を満たすものであればよく、特に制限されないが、エチレン・酢酸ビニル共重合体、シリコーンゴムなどでありうる。 The resin constituting the coating layer 13 is not particularly limited as long as the volume resistivity and surface free energy satisfy the above ranges, and may be ethylene / vinyl acetate copolymer, silicone rubber, or the like.
　〔エチレン・酢酸ビニル共重合体〕
　エチレン・酢酸ビニル共重合体は、エチレン由来の構造単位と、酢酸ビニル由来の構造単位とを含む。 [Ethylene / vinyl acetate copolymer]
The ethylene / vinyl acetate copolymer includes a structural unit derived from ethylene and a structural unit derived from vinyl acetate.
　酢酸ビニル由来の構造単位の含有比率は、粘着性を発現せず、かつ低い帯電性が得られる程度であればよく、エチレン・酢酸ビニル共重合体を構成する全構造単位に対して５質量％以上２０質量％未満であることが好ましい。酢酸ビニル由来の構造単位の含有比率が５質量％以上であると、低い体積抵抗率が得られやすいため、低い帯電性が得られやすく、被覆層１３の表面に汚れを付着させにくくしうる。酢酸ビニル由来の構造単位の含有比率が２０質量％以下であると、粘着性が発現しにくいため、被覆層１３の表面に汚れを付着させにくくしうる。酢酸ビニル由来の構造単位の含有比率は、エチレン・酢酸ビニル共重合体を構成する全構造単位に対して５～１７質量％であることがより好ましい。 The content ratio of the structural unit derived from vinyl acetate may be such that it does not exhibit adhesiveness and low chargeability is obtained, and is 5 mass% with respect to all structural units constituting the ethylene / vinyl acetate copolymer. The content is preferably less than 20% by mass. When the content ratio of the structural unit derived from vinyl acetate is 5% by mass or more, a low volume resistivity is easily obtained, so that low chargeability is easily obtained, and dirt can be hardly adhered to the surface of the coating layer 13. When the content ratio of the structural unit derived from vinyl acetate is 20% by mass or less, the tackiness is hardly expressed, and thus the surface of the coating layer 13 can be hardly adhered. The content ratio of the structural units derived from vinyl acetate is more preferably 5 to 17% by mass with respect to all the structural units constituting the ethylene / vinyl acetate copolymer.
　エチレン・酢酸ビニル共重合体は、エチレンおよび酢酸ビニル以外の他のモノマー由来の構造単位をさらに含んでもよい。他のモノマーの例には、プロピレン、１－ブテン、３－メチル－１－ブテン、１－ペンテン、４－メチル－１－ペンテン、１－ヘキセン、１－オクテン、１－デセンなどの炭素数３～２０のα－オレフィンや、（メタ）アクリル酸、（メタ）アクリル酸エステル、スチレンが含まれる。他のモノマー由来の構造単位の含有比率は、エチレン・酢酸ビニル共重合体を構成する全構造単位に対して１０質量％以下であることが好ましく、０質量％であることがより好ましい。 The ethylene / vinyl acetate copolymer may further contain structural units derived from monomers other than ethylene and vinyl acetate. Examples of other monomers include 3 carbon atoms such as propylene, 1-butene, 3-methyl-1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene and 1-decene. -20 α-olefins, (meth) acrylic acid, (meth) acrylic acid esters, and styrene. The content ratio of the structural units derived from other monomers is preferably 10% by mass or less, and more preferably 0% by mass with respect to all the structural units constituting the ethylene / vinyl acetate copolymer.
　エチレン・酢酸ビニル共重合体のメルトフローレート（ＪＩＳ Ｋ７２１０－１９９９、１９０℃、２１６０ｇ荷重）は、１～２０ｇ／１０分であることが好ましい。エチレン・酢酸ビニル共重合体のＭＦＲが上記範囲内であることで、シート成形性を維持しやすい。エチレン・酢酸ビニル共重合体のＭＦＲは、５～１５ｇ／１０分であることがより好ましい。 The melt flow rate (JIS K7210-1999, 190 ° C., 2160 g load) of the ethylene / vinyl acetate copolymer is preferably 1 to 20 g / 10 min. When the MFR of the ethylene / vinyl acetate copolymer is within the above range, the sheet formability is easily maintained. The MFR of the ethylene / vinyl acetate copolymer is more preferably 5 to 15 g / 10 min.
　〔シリコーンゴム〕
　シリコーンゴムは、特に制限されず、付加反応硬化型または縮合硬化型のシリコーンゴム組成物の硬化物でありうる。 〔silicone rubber〕
The silicone rubber is not particularly limited, and may be a cured product of an addition reaction curing type or condensation curing type silicone rubber composition.
　付加反応硬化型のシリコーンゴム組成物の硬化物は、架橋性反応基として１分子中に２以上のアルケニル基（好ましくはビニル基）を有するポリオルガノシロキサンと、硬化剤とを含むシリコーンゴム組成物を硬化（付加硬化）させて得ることができる。 A cured product of an addition reaction curable silicone rubber composition is a silicone rubber composition comprising a polyorganosiloxane having two or more alkenyl groups (preferably vinyl groups) in one molecule as a crosslinkable reactive group, and a curing agent. Can be obtained by curing (addition curing).
　架橋性反応基として１分子中に２以上のアルケニル基（好ましくはビニル基）を有するポリオルガノシロキサンは、下記式（１）で表されるオルガノポリシロキサンであることが好ましい。
　ＲｎＳｉＯ（４－ｎ）／２ ・・・（１） The polyorganosiloxane having two or more alkenyl groups (preferably vinyl groups) in one molecule as a crosslinkable reactive group is preferably an organopolysiloxane represented by the following formula (1).
R n SiO (4-n) / 2 (1)
　式（１）において、Ｒは、それぞれ置換もしくは無置換の炭素数１～１２の１価の炭化水素基である。ただし、複数のＲのうち少なくとも２つはアルケニル基（好ましくはビニル基）である。１価の炭化水素基の例には、炭素数１～８のアルキル基、シクロアルキル基、アルケニル基、シクロアルケニル基、アリール基、アラルキル基およびこれらの基の水素原子の少なくとも一部をハロゲン原子などで置換したものが含まれ、好ましくはメチル基、ビニル基、フェニル基、またはトリフルオロプロピル基であり、より好ましくはメチル基である。複数のＲは、互いに同一であってもよいし、異なっていてもよい。ｎは、１．９５～２．０５の正数である。 In the formula (1), R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms. However, at least two of the plurality of R are alkenyl groups (preferably vinyl groups). Examples of the monovalent hydrocarbon group include an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an aryl group, an aralkyl group, and at least a part of the hydrogen atoms of these groups are halogen atoms. And the like, preferably a methyl group, a vinyl group, a phenyl group, or a trifluoropropyl group, and more preferably a methyl group. Several R may mutually be the same and may differ. n is a positive number from 1.95 to 2.05.
　硬化剤（架橋剤）は、付加反応硬化剤でありうる。付加反応硬化剤は、オルガノハイドロジェンポリシロキサンなどのシラン化合物でありうる。 The curing agent (crosslinking agent) can be an addition reaction curing agent. The addition reaction curing agent can be a silane compound such as an organohydrogenpolysiloxane.
　シリコーンゴム組成物は、必要に応じて反応触媒やシリコーンオイルなどをさらに含んでもよい。反応触媒は、白金金属粒子、塩化第二白金、塩化白金酸などの白金系触媒が含まれる。シリコーンオイルは、ポリオルガノシロキサンを主骨格とした液状のシリコーンオイルであり、その例には、オルガノ基としてメチル基のみを有するジメチルシリコーンオイルや；メチル基の一部がフェニル基、ビニル基、アルキル基、アラルキル基、アミノ基、カルボキシル基、エポキシ基、水酸基、ポリオキシアルキレン基などで置換された変性シリコーンオイルが含まれる。これらの成分の合計量は、シリコーンゴム組成物の全固形分に対して１０質量％以下としうる。 The silicone rubber composition may further contain a reaction catalyst, silicone oil and the like as necessary. The reaction catalyst includes platinum-based catalysts such as platinum metal particles, platinous chloride, and chloroplatinic acid. Silicone oils are liquid silicone oils with polyorganosiloxane as the main skeleton. Examples include dimethyl silicone oils that have only methyl groups as organo groups; some methyl groups are phenyl groups, vinyl groups, alkyl groups. Modified silicone oils substituted with groups, aralkyl groups, amino groups, carboxyl groups, epoxy groups, hydroxyl groups, polyoxyalkylene groups and the like are included. The total amount of these components may be 10% by mass or less based on the total solid content of the silicone rubber composition.
　縮合硬化型のシリコーンゴム組成物の硬化物は、水酸基が結合したケイ素原子を１分子中に２以上有するポリジオルガノポリシロキサンと、１分子中に３以上の縮合性官能基を有するシラン化合物と、縮合触媒とを含むシリコーンゴム組成物を硬化（縮合硬化）させて得ることができる。 A cured product of the condensation curable silicone rubber composition comprises a polydiorganopolysiloxane having two or more silicon atoms bonded to a hydroxyl group in one molecule, a silane compound having three or more condensable functional groups in one molecule, It can be obtained by curing (condensation curing) a silicone rubber composition containing a condensation catalyst.
　水酸基が結合したケイ素原子を１分子中に２以上有するジオルガノポリシロキサンは、Ｓｉ原子に結合する有機基が、例えばメチル基、エチル基などのアルキル基；フェニル基、トリル基などのアリール基；シクロヘキシル基などのシクロアルキル基であるジオルガノポリシロキサンが含まれる。 In the diorganopolysiloxane having two or more silicon atoms bonded to a hydroxyl group in one molecule, the organic group bonded to the Si atom is an alkyl group such as a methyl group or an ethyl group; an aryl group such as a phenyl group or a tolyl group; Included are diorganopolysiloxanes that are cycloalkyl groups such as cyclohexyl groups.
　シラン化合物は、加水分解可能な基を有する多官能シラン化合物であり、下記一般式（２）で表されるシラン化合物であることが好ましい。
　（Ｒ１）ｍＳｉＸｎ            （２）
（式中、Ｒ１は、メチル基、ビニル基またはフェニル基を表す。Ｘは、炭素数１～５のアルコキシ基、メチルエチルケトオキシム基、プロペニルオキシ基またはアセトキシ基を表す。ｍは０または１を表す。ｎは３または４を表す。ただし、ｍが０のときｎが４であり、ｍが１のときｎが３である。）で表されるシラン化合物であることが好ましい。 The silane compound is a polyfunctional silane compound having a hydrolyzable group, and is preferably a silane compound represented by the following general formula (2).
(R 1 ) mSiXn (2)
(In the formula, R 1 represents a methyl group, a vinyl group or a phenyl group. X represents an alkoxy group having 1 to 5 carbon atoms, a methyl ethyl ketoxime group, a propenyloxy group or an acetoxy group. N represents 3 or 4. However, when m is 0, n is 4, and when m is 1, n is 3.
　縮合触媒の例には、テトライソプロポキシチタン、テトラ－ｎ－ブトキシチタンなどのチタン化合物が含まれる。 Examples of the condensation catalyst include titanium compounds such as tetraisopropoxy titanium and tetra-n-butoxy titanium.
　シリコーンゴム組成物の例には、信越化学社製Ｓコート５７などが含まれる。 Examples of the silicone rubber composition include S coat 57 manufactured by Shin-Etsu Chemical Co., Ltd.
　これらの中でも、コーキング材に対する非接着性が得られやすい点から、被覆層１３を構成する樹脂は、エチレン・酢酸ビニル共重合体であることが好ましい。 Among these, the resin constituting the coating layer 13 is preferably an ethylene / vinyl acetate copolymer because non-adhesiveness to the caulking material is easily obtained.
　なお、被覆層１３の組成は、これらに限定されない。例えば、体積抵抗率が上記の範囲を満たさない樹脂（例えばポリエチレンやポリプロピレン）であっても、カーボンブラックなどの導電材と組み合わせることで、被覆層１３全体として、体積抵抗率および表面自由エネルギーが上記の範囲を満たすようにしてもよい。 In addition, the composition of the coating layer 13 is not limited to these. For example, even if the resin has a volume resistivity not satisfying the above range (for example, polyethylene or polypropylene), the volume resistivity and the surface free energy as the whole coating layer 13 are combined with a conductive material such as carbon black. The range may be satisfied.
　〔他の成分〕
　被覆層１３は、本発明の効果を損なわない範囲で、前述の樹脂以外の他の成分をさらに含んでもよい。他の成分の例には、着色顔料や体質顔料、骨材が含まれる。 [Other ingredients]
The coating layer 13 may further include other components than the above-mentioned resin as long as the effects of the present invention are not impaired. Examples of other components include coloring pigments, extender pigments, and aggregates.
　着色顔料の例には、酸化チタン、炭酸カルシウム、カーボンブラック、鉄黒、チタンイエロー、ベンガラ、紺青、コバルトブルー、セルリアンブルー、群青、コバルトグリーン、モリブデン赤などの無機顔料；ＣｏＡｌ、ＣｏＣｒＡｌ、ＣｏＣｒＺｎＭｇＡｌ、ＣｏＮｉＺｎＴｉ、ＣｏＣｒＺｎＴｉ、ＮｉＳｂＴｉ、ＣｒＳｂＴｉ、ＦｅＣｒＺｎＮｉ、ＭｎＳｂＴｉ、ＦｅＣｒ、ＦｅＣｒＮｉ、ＦｅＮｉ、ＦｅＣｒＮｉＭｎ、ＣｏＣｒ、Ｍｎ、Ｃｏ、ＳｎＺｎＴｉなどの金属成分を含む複合酸化物焼成顔料；Ａｌ、樹脂コーティングＡｌ、Ｎｉなどのメタリック顔料；および、リソールレッドＢ、ブリリアントスカーレットＧ、ピグメントスカーレット３Ｂ、ブリリアントカーミン６Ｂ、レーキレッドＣ、レーキレッドＤ、パーマネントレッド４Ｒ、ボルドー１０Ｂ、ファストイエローＧ、ファストイエロー１０Ｇ、パラレッド、ウォッチングレッド、ベンジジンイエロー、ベンジジンオレンジ、ボンマルーンＬ、ボンマルーンＭ、ブリリアントファストスカーレット、バーミリオンレッド、フタロシアニンブロー、フタロシアニングリーン、ファストスカイブルー、アニリンブラックなどの有機顔料が含まれる。体質顔料の例には、硫酸バリウム、酸化チタン、シリカ、炭酸カルシウムが含まれる。骨材の例には、樹脂粒子や；ガラス、炭化ケイ素、窒化ホウ素、ジルコニア、アルミナ、シリカなどの無機化合物からなる無機粒子が含まれる。また、被覆層１３がシリコーンゴムを含む場合、他の成分としてシリコーンオイルなども含まれうる。これらの他の成分の合計量は、被覆層１３に対して１０質量％以下としうる。 Examples of coloring pigments include inorganic pigments such as titanium oxide, calcium carbonate, carbon black, iron black, titanium yellow, bengara, bitumen, cobalt blue, cerulean blue, ultramarine blue, cobalt green, and molybdenum red; CoAl, CoCrAl, CoCrZnMgAl, Composite oxide calcined pigments containing metallic components such as CoNiZnTi, CoCrZnTi, NiSbTi, CrSbTi, FeCrZnNi, MnSbTi, FeCr, FeCrNi, FeNi, FeCrNiMn, CoCr, Mn, Co, SnZnTi; Metallic pigments such as Al, resin-coated Al, Ni ; And Resol Red B, Brilliant Scarlet G, Pigment Scarlet 3B, Brilliant Carmine 6B, Lake Red C, Lake Red D, Permanentre 4R, Bordeaux 10B, Fast Yellow G, Fast Yellow 10G, Para Red, Watching Red, Benzidine Yellow, Benzidine Orange, Bon Maroon L, Bon Maroon M, Brilliant Fast Scarlet, Vermilion Red, Phthalocyanine Blow, Phthalocyanine Green, Fast Sky Blue Organic pigments such as aniline black are included. Examples of extender pigments include barium sulfate, titanium oxide, silica, and calcium carbonate. Examples of aggregates include resin particles and inorganic particles made of inorganic compounds such as glass, silicon carbide, boron nitride, zirconia, alumina, and silica. Moreover, when the coating layer 13 contains silicone rubber, silicone oil etc. may be contained as another component. The total amount of these other components may be 10% by mass or less with respect to the coating layer 13.
　被覆層１３の厚みは、ジョイナーとして用いた際に、コーキング材に対する非接着性を維持できる程度であればよく、特に限定されないが、３～１２０μｍであることが好ましい。被覆層１３の厚みが３μｍ以上であると、ジョイナーとして用いた際に、コーキング材に対する非接着性を良好に維持しやすく、１２０μｍ以下であると、例えば被覆層１３を塗布形成する場合、塗料の乾燥時にワキが発生することによる被覆金属板１０の外観不良を抑制しやすい。被覆層１３の厚みは、上記観点から、５～１００μｍであることがより好ましい。 The thickness of the coating layer 13 is not particularly limited as long as it can maintain non-adhesiveness to the caulking material when used as a joiner, but is preferably 3 to 120 μm. When the thickness of the coating layer 13 is 3 μm or more, when used as a joiner, it is easy to maintain good non-adhesiveness to the caulking material, and when it is 120 μm or less, for example, when the coating layer 13 is formed by coating, It is easy to suppress the appearance defect of the coated metal plate 10 due to the occurrence of cracks during drying. The thickness of the covering layer 13 is more preferably 5 to 100 μm from the above viewpoint.
　（他の層）
　本発明の被覆金属板１０は、必要に応じて、金属板１１と被覆層１３との間に下塗り塗膜や接着層などの他の層（不図示）をさらに有してもよい。 (Other layers)
The coated metal plate 10 of the present invention may further include another layer (not shown) such as an undercoat coating film or an adhesive layer between the metal plate 11 and the coating layer 13 as necessary.
　〔下塗り塗膜〕
　下塗り塗膜は、金属板または化成処理皮膜の表面に配置されうる。下塗り塗膜は、被覆層の密着性や被覆金属板の耐食性を高めうる。 [Undercoat]
The undercoat film can be disposed on the surface of the metal plate or the chemical conversion film. The undercoat coating film can improve the adhesion of the coating layer and the corrosion resistance of the coated metal plate.
　下塗り塗膜を構成する樹脂（ベース樹脂）の種類は、特に限定されない。下塗り塗膜を構成する樹脂の例には、エポキシ樹脂やアクリル樹脂、ポリエステル樹脂などが含まれる。下塗り塗膜は、必要に応じて骨材や、防錆顔料などをさらに含んでもよい。そのような下塗り塗膜は、金属板上に、下塗り塗料を塗布した後、２００～２５０℃で３０～１２０秒間焼き付けることで形成することができる。 The type of resin (base resin) constituting the undercoat coating film is not particularly limited. Examples of the resin constituting the undercoat coating include epoxy resin, acrylic resin, and polyester resin. The undercoat coating film may further contain an aggregate, a rust preventive pigment, and the like as necessary. Such an undercoat coating film can be formed by applying an undercoat paint on a metal plate and baking at 200 to 250 ° C. for 30 to 120 seconds.
　〔接着層〕
　接着層は、特に制限されないが、メラミン系接着剤、エポキシ系接着剤などの熱硬化性接着剤の硬化物や、各種エラストマー系接着剤などでありうる。 (Adhesive layer)
The adhesive layer is not particularly limited, but may be a cured product of a thermosetting adhesive such as a melamine adhesive or an epoxy adhesive, or various elastomer adhesives.
　２．被覆金属板の製造方法
　本発明の被覆金属板は、任意の方法で製造することができる。本発明の被覆金属板１０は、例えば、金属板１１上に、被覆層用樹脂組成物としてのフィルムを積層した後、熱圧着（熱ラミネート）して被覆層１３を形成して得てもよいし（熱圧着法）；金属板１１上に、当該フィルムを、接着剤を介して積層して被覆層１３を形成して得てもよいし（接着法）；金属板１１上に、被覆層用樹脂組成物の溶融物を流延した後、冷却して被覆層１３を形成して得てもよいし（押出流延法）；金属板１１上に、被覆層用樹脂組成物を塗布した後、乾燥または加熱して被覆層１３を形成して得てもよい（塗布法）。 2. The manufacturing method of a covering metal plate The covering metal plate of this invention can be manufactured by arbitrary methods. The coated metal plate 10 of the present invention may be obtained, for example, by laminating a film as a resin composition for a coating layer on the metal plate 11 and then forming the coating layer 13 by thermocompression bonding (thermal lamination). (The thermocompression bonding method); the film may be laminated on the metal plate 11 via an adhesive to form the coating layer 13 (adhesion method); the coating layer on the metal plate 11 It may be obtained by casting a melt of the resin composition for cooling and then forming the coating layer 13 by cooling (extrusion casting method); coating the resin composition for the coating layer on the metal plate 11 Thereafter, the coating layer 13 may be formed by drying or heating (coating method).
　例えば、エチレン・酢酸ビニル共重合体を含む被覆層１３は、金属板１１上に、エチレン・酢酸ビニル共重合体を含むフィルムを熱圧着するか（熱圧着法）、またはエチレン・酢酸ビニル共重合体を含む被覆層用樹脂組成物を溶融流延させた後、冷却して（押出流延法）、形成することができる。熱圧着法における熱圧着条件は、特に制限されないが、例えば１００～２００℃としうる。 For example, the coating layer 13 containing an ethylene / vinyl acetate copolymer is formed by thermocompression bonding a film containing an ethylene / vinyl acetate copolymer on the metal plate 11 (thermocompression bonding method), or ethylene / vinyl acetate copolymer. After melt-casting the resin composition for coating layer containing the coalescence, it can be formed by cooling (extrusion casting method). The thermocompression bonding conditions in the thermocompression bonding method are not particularly limited, but may be, for example, 100 to 200 ° C.
　また、シリコーンゴムを含む被覆層１３は、金属板１１上に、前述のシリコーン系塗布組成物を含む被覆層用樹脂組成物を塗布した後、常温乾燥または加熱硬化させて形成することができる。被覆層用樹脂組成物の塗布方法は、特に限定されないが、例えばロールコート法、フローコート法、カーテンフロー法、スプレー法でありうる。加熱硬化条件は、被覆層用樹脂組成物中の反応硬化型シリコーンゴムが十分に硬化する程度であればよく、例えば２５～３００℃でありうる。 The coating layer 13 containing silicone rubber can be formed by applying a resin composition for a coating layer containing the above-mentioned silicone-based coating composition on the metal plate 11 and then drying at room temperature or curing by heating. Although the coating method of the resin composition for coating layers is not specifically limited, For example, a roll coat method, a flow coat method, a curtain flow method, and a spray method may be used. The heat curing conditions may be such that the reaction-curable silicone rubber in the coating layer resin composition is sufficiently cured, and may be, for example, 25 to 300 ° C.
　被覆層１３は、金属板１１の表面全体に配置されていてもよいし、後述するジョイナー２０としたときに、コーキング材の受け部となる部分（後述する凸条部２１の頂面２１Ａ）のみに配置されてもよい。このような被覆金属板は、例えばジョイナー用の被覆金属板として好ましく用いることができる。 The coating layer 13 may be disposed on the entire surface of the metal plate 11, or only a portion (a top surface 21 </ b> A of the ridge portion 21, which will be described later) serving as a receiving portion for the caulking material when the joiner 20 is described later. May be arranged. Such a coated metal plate can be preferably used, for example, as a coated metal plate for a joiner.
　３．ジョイナー
　本発明のジョイナーは、隣り合う外装材の目地部に配置されるためのジョイナー（目地材）であって、本発明の被覆金属板を有する。 3. Joiner The joiner of the present invention is a joiner (joint material) for being arranged at a joint portion of an adjacent exterior material, and includes the coated metal plate of the present invention.
　図２は、ジョイナー２０の使用状態の一例を示す部分斜視図である。図３ＡおよびＢは、ジョイナー２０の構成例を示す断面図である。 FIG. 2 is a partial perspective view showing an example of the use state of the joiner 20. 3A and 3B are cross-sectional views illustrating a configuration example of the joiner 20.
　図２に示されるように、ジョイナー２０は、断面形状がハット型の被覆金属板１０を有する。そのようなジョイナー２０は、ハットジョイナーとも称される。ジョイナー２０は、凸条部２１と、凸条部２１の基端部と接続される２つの基板部２３とを有する。凸条部２１は、建物外装の目地部３０に配置され、コーキング材４０を支持しうる（コーキング材４０の受け部となりうる）。２つの基板部２３は、隣り合う２つの外装材５０の端部の間隔（目地部３０の幅）を、一定の間隔で保持しうる。 As shown in FIG. 2, the joiner 20 has a covered metal plate 10 having a hat-shaped cross section. Such a joiner 20 is also referred to as a hat joiner. The joiner 20 has a ridge portion 21 and two substrate portions 23 connected to the base end portion of the ridge portion 21. The ridge portion 21 is disposed on the joint portion 30 of the building exterior and can support the caulking material 40 (can be a receiving portion of the caulking material 40). The two board | substrate parts 23 can hold | maintain the space | interval (width | variety of the joint part 30) of the edge part of the two adjacent exterior materials 50 by a fixed space | interval.
　被覆層１３は、ジョイナー２０の表面のうち、少なくとも凸条部２１のコーキング材と接する面（頂面）２１Ａに配置されていればよい。すなわち、被覆層１３は、ジョイナー２０の表面全体に配置されていてもよいし（図３Ａ参照）、凸条部２１のコーキング材を支持する面（頂面）２１Ａのみに配置されていてもよい（図３Ｂ参照）。 The covering layer 13 should just be arrange | positioned among the surfaces of the joiner 20 at least on the surface (top surface) 21A which contact | connects the caulking material of the protruding item | line part 21. FIG. That is, the coating layer 13 may be disposed on the entire surface of the joiner 20 (see FIG. 3A), or may be disposed only on the surface (top surface) 21A that supports the caulking material of the ridge portion 21. (See FIG. 3B).
　ジョイナー２０は、任意の方法で製造することができる。例えば、ジョイナー２０は、前述の金属板１１と被覆層１３とを有する被覆金属板１０を、プレス加工などにより成形して得てもよいし；金属板１１をプレス加工などで成形した後、凸条部２１の頂面２１Ａ上に被覆層１３を形成して得てもよい。 Joiner 20 can be manufactured by any method. For example, the joiner 20 may be obtained by molding the coated metal plate 10 having the metal plate 11 and the coating layer 13 described above by pressing or the like; The covering layer 13 may be formed on the top surface 21A of the strip 21.
　以下、本発明について実施例を参照して詳細に説明するが、本発明はこれらの実施例により限定されない。 Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.
　１．被覆層用材料の準備
　（フィルム１～７）
　表１に示される酢酸ビニル含有率のエチレン・酢酸ビニル共重合体のペレットを、プレス機の間にセットし、エチレン・酢酸ビニル共重合体の溶融温度＋３０℃で加熱しながら加圧成形して、エチレン・酢酸ビニル共重合体からなる、厚み５０μｍのフィルム１～７を得た。 1. Preparation of coating layer material (Films 1-7)
Set the pellets of ethylene / vinyl acetate copolymer with the vinyl acetate content shown in Table 1 between the presses and press-mold while heating at the melting temperature of the ethylene / vinyl acetate copolymer + 30 ° C. Films 1 to 7 made of ethylene / vinyl acetate copolymer and having a thickness of 50 μm were obtained.
　フィルム１～７の組成を、表１に示す。
Figure JPOXMLDOC01-appb-T000001
 The compositions of films 1 to 7 are shown in Table 1.
Figure JPOXMLDOC01-appb-T000001
　このうち、フィルム３のメルトフローレート（ＪＩＳ Ｋ７２１０－１９９９、１９０℃、２１６０ｇ荷重）は、９．０ｇ／１０分であった。 Among these, the melt flow rate (JIS K7210-1999, 190 ° C., 2160 g load) of the film 3 was 9.0 g / 10 minutes.
　（フィルム８～１３）
　フィルム８：ポリスチレンフィルム（ＰＳ）（旭化成ケミカルズ社製、ＯＰＳ（登録商標）フィルム、厚み５０μｍ）
　フィルム９：高密度ポリエチレンフィルム（ＨＤＰＥ）（日東エルマテリアル社製、ポリエチマスカー、厚み１０μｍ）
　フィルム１０：ポリ塩化ビニリデンフィルム（ＰＶｄＣ）（旭化成社製、サラン（登録商標）ＵＢ、厚み２５μｍ）
　フィルム１１：ポリプロピレンフィルム（ＰＰ）（東レフィルム加工社製、トレファン（登録商標）ＮＯ、厚み５０μｍ）
　フィルム１２：ポリメチルメタクリレートフィルム（ＰＭＭＡ）（三菱ケミカル社製、アクリプレンＴＭ、厚み５０μｍ）
　フィルム１３：ポリカーボネートフィルム（ＰＣ）（帝人社製、ピュアエース（登録商標）、厚み１００μｍ） (Film 8-13)
Film 8: Polystyrene film (PS) (Asahi Kasei Chemicals, OPS (registered trademark) film, thickness 50 μm)
Film 9: High-density polyethylene film (HDPE) (manufactured by Nitto L Material, polyethylene masker, thickness 10 μm)
Film 10: Polyvinylidene chloride film (PVdC) (Asahi Kasei Corporation, Saran (registered trademark) UB, thickness 25 μm)
Film 11: Polypropylene film (PP) (manufactured by Toray Film Processing Co., Ltd., Treffan (registered trademark) NO, thickness 50 μm)
Film 12: Polymethyl methacrylate film (PMMA) (manufactured by Mitsubishi Chemical Co., Ltd., Acryprene TM, thickness 50 μm)
Film 13: Polycarbonate film (PC) (manufactured by Teijin Limited, Pure Ace (registered trademark), thickness 100 μm)
　（塗料１～３）
　塗料１：シリコーン系塗料（信越化学社製、シリコーンゴム　Ｓコート５７）
　塗料２：シリコーン系塗料（信越化学社製、シリコーンレジン　ＫＲ－３００）
　塗料３：エポキシ樹脂系塗料（日本ペイント・インダストリアルコーティングス株式会社製　ニッペパワーバインド） (Paints 1 to 3)
Paint 1: Silicone paint (Shin-Etsu Chemical Co., silicone rubber S coat 57)
Paint 2: Silicone paint (Shin-Etsu Chemical Co., Ltd., silicone resin KR-300)
Paint 3: Epoxy resin paint (Nippe Power Bind made by Nippon Paint Industrial Coatings Co., Ltd.)
　２．被覆金属板の作製および評価
　（化成処理金属板の準備）
　塗装原板（金属板）として、厚み０．３５μｍの溶融５５％Ａｌ－４５％Ｚｎ合金めっき鋼板（両面付着量１５０ｇ／ｍ２）を準備した。
　このめっき鋼板を、アルカリ脱脂した。次いで、得られためっき鋼板の表面に、塗装前処理として、塗布型クロメート処理液（サーフコートＮＲＣ３００、日本ペイント社製）を塗布し、到達温度１００℃で加熱して、全クロム換算付着量が４０ｍｇ／ｍ２の化成処理皮膜を形成し、化成処理金属板を得た。 2. Preparation and evaluation of coated metal plate (Preparation of chemical conversion treated metal plate)
As a coating original plate (metal plate), a molten 55% Al-45% Zn alloy-plated steel plate (double-side adhesion amount 150 g / m 2 ) having a thickness of 0.35 μm was prepared.
This plated steel sheet was alkali degreased. Next, as a pre-coating treatment, a coating type chromate treatment liquid (Surfcoat NRC300, manufactured by Nippon Paint Co., Ltd.) is applied to the surface of the obtained plated steel sheet and heated at an ultimate temperature of 100 ° C. A 40 mg / m 2 chemical conversion film was formed to obtain a chemical conversion metal plate.
　（被覆金属板１～４および８～１０の作製）
　得られた化成処理金属板の化成処理皮膜上に、表２に示されるフィルムを配置し、熱ラミネート法にてエチレン・酢酸ビニル共重合体をガラス転移温度（Ｔｇ）＋４０℃で仮接着した後、さらにオーブンにて、ガラス転移温度（Ｔｇ）＋８０℃で６０秒間加熱して、厚み５０μｍの被覆層を形成し、被覆金属１～４および８～１０を得た。 (Preparation of coated metal plates 1 to 4 and 8 to 10)
After disposing the film shown in Table 2 on the chemical conversion film of the obtained chemical conversion metal plate and temporarily bonding the ethylene / vinyl acetate copolymer at a glass transition temperature (Tg) + 40 ° C. by a thermal laminating method. Further, it was heated in an oven at a glass transition temperature (Tg) + 80 ° C. for 60 seconds to form a coating layer having a thickness of 50 μm, and coated metals 1 to 4 and 8 to 10 were obtained.
　（被覆金属板５の作製）
　得られた化成処理金属板の化成処理皮膜上に、表２に示される塗料を塗布した後、常温乾燥にて１週間乾燥させ、厚み１００μｍの被覆層を形成し、被覆金属板５を得た。 (Preparation of coated metal plate 5)
A coating shown in Table 2 was applied on the chemical conversion coating on the obtained chemical conversion metal plate, and then dried at room temperature for one week to form a coating layer having a thickness of 100 μm, whereby a coated metal plate 5 was obtained. .
　（被覆金属板１１の作製）
　得られた化成処理金属板の化成処理皮膜上に、表２に示される塗料を塗布した後、３００℃で加熱して、厚み５μｍの被覆層を形成し、被覆金属板１１を得た。 (Preparation of coated metal plate 11)
A coating shown in Table 2 was applied on the chemical conversion coating on the obtained chemical conversion metal plate, and then heated at 300 ° C. to form a coating layer having a thickness of 5 μm, whereby a coated metal plate 11 was obtained.
　（被覆金属板６、１２、１４の作製）
　エチレン・酢酸ビニル共重合体フィルム１を、表２に示されるフィルムに変更した以外は被覆金属板１と同様にして被覆金属板６、１２、１４を得た。なお、熱ラミネート（仮接着）は、樹脂のガラス転移温度（Ｔｇ）＋４０℃で行い、オーブンでの加熱は、樹脂のガラス転移温度（Ｔｇ）＋８０℃で行った。 (Preparation of coated metal plates 6, 12, 14)
Coated metal plates 6, 12, and 14 were obtained in the same manner as the coated metal plate 1 except that the ethylene / vinyl acetate copolymer film 1 was changed to the film shown in Table 2. The thermal lamination (temporary adhesion) was performed at the glass transition temperature (Tg) of the resin + 40 ° C., and the heating in the oven was performed at the glass transition temperature (Tg) of the resin + 80 ° C.
　（被覆金属板７、１３、1５の作製）
　得られた化成処理金属板の化成処理皮膜上に、接着剤を介して、フィルム９、１１または１３を張り合わせて、被覆金属板７、１３または1５を得た。 (Preparation of coated metal plates 7, 13, 15)
The film 9, 11 or 13 was laminated on the chemical conversion film of the obtained chemical conversion metal plate via an adhesive to obtain a coated metal plate 7, 13 or 15.
　（被覆金属板１６の作製）
　得られた化成処理金属板の化成処理皮膜上に、表２に示される塗料を塗布した後、２００℃で加熱して、厚み５μｍの被覆層を形成し、被覆金属板１６を得た。 (Preparation of coated metal plate 16)
A coating shown in Table 2 was applied on the chemical conversion coating on the obtained chemical conversion metal plate, and then heated at 200 ° C. to form a coating layer having a thickness of 5 μm, whereby a coated metal plate 16 was obtained.
　得られた被覆金属板１～１６における、被覆層の体積抵抗率および表面自由エネルギーを、以下の方法で測定した。 In the obtained coated metal plates 1 to 16, the volume resistivity and surface free energy of the coating layer were measured by the following methods.
　（体積抵抗率）
　ＪＩＳ Ｃ ２１３９：２００８「固体電気絶縁材料－体積抵抗率および表面抵抗率の測定方法」に準拠して、被覆層の体積抵抗率を測定した。測定は、以下の条件で行った。
　（試験条件）
　試験装置：デジタル超高抵抗／微少電流計８３４０Ａ型（エーディーシー社製）
　電極サイズ：主電極５０ｍｍφ、ガード電極内径６０ｍｍφ、外径８０ｍｍφ
　印加電圧：１００Ｖ、５００Ｖ（ＤＣ）
　印加時間：６０ｓｅｃ
　試験環境：温度２３±２℃、湿度５０±５％ＲＨ
　試験片寸法：１００ｍｍ×１００ｍｍ
　試験数：ｎ＝３ (Volume resistivity)
The volume resistivity of the coating layer was measured according to JIS C 2139: 2008 “Solid Electrical Insulating Material—Method of Measuring Volume Resistivity and Surface Resistivity”. The measurement was performed under the following conditions.
(Test conditions)
Test equipment: Digital ultra-high resistance / micro ammeter 8340A type (manufactured by ADC)
Electrode size: Main electrode 50 mmφ, guard electrode inner diameter 60 mmφ, outer diameter 80 mmφ
Applied voltage: 100V, 500V (DC)
Application time: 60 sec
Test environment: temperature 23 ± 2 ° C, humidity 50 ± 5% RH
Test specimen dimensions: 100 mm x 100 mm
Number of tests: n = 3
　（表面自由エネルギー）
　ＪＩＳ Ｒ ３２５７：１９９９「基板ガラスの表面のぬれ性試験方法」に準拠し、純水およびヨウ化メチレンの接触角を測定した。測定は、ポータブル接触角計ＰＣＡ－１（協和界面科学社製）を用いて行った。得られた接触角の値と、Ｋａｅｌｂｌｅ－Ｕｙ式を用いて表面自由エネルギーを算出した。 (Surface free energy)
In accordance with JIS R 3257: 1999 “Test Method for Wetting of Surface of Substrate Glass”, contact angles of pure water and methylene iodide were measured. The measurement was performed using a portable contact angle meter PCA-1 (manufactured by Kyowa Interface Science Co., Ltd.). The surface free energy was calculated using the obtained contact angle value and the Kaelble-Uy equation.
　さらに、暴露後の被覆金属板１～１６、のコーキング材に対する非接着性を、以下の方法で測定した。 Furthermore, the non-adhesiveness of the coated metal plates 1 to 16 after exposure to the caulking material was measured by the following method.
　（コーキング材に対する非接着性）
　得られた被覆金属板を、ＪＩＳ Ｚ ２３８１に準拠して、暴露角度を３５度とし、設置方向を南向きにして、２週間屋外に暴露した。屋外暴露後の被覆金属板に対して、コーキング材用のプライマーを刷毛にて塗布し、常温にて３０分間乾燥させた。次いで、プライマーの表面にコーキング材を塗布し、常温にて１週間乾燥させた。
　乾燥したコーキング材を被覆金属板から手で引き剥がし、容易に剥がれたものを「○」、剥がれなかったものを「×」と評価した。
　なお、コーキング材は、１液型変性シリコーン系コーキング材（ＳＲシールＳ７０；サンライズＭＳＩ株式会社）、またはウレタン系コーキング材（ＦＣ７００；ニチハ株式会社）を使用した。また、プライマーを塗布したのは、実際の施工時に、コーキング材の受け部となる面にも意図せずプライマーが塗布される場合が多いことを考慮し、実際の施工条件に近い条件とするためである。 (Non-adhesiveness to caulking material)
The obtained coated metal plate was exposed to the outdoors for 2 weeks with an exposure angle of 35 degrees and an installation direction facing south according to JIS Z 2381. A primer for caulking material was applied to the coated metal plate after outdoor exposure with a brush and dried at room temperature for 30 minutes. Next, a caulking material was applied to the surface of the primer and dried at room temperature for 1 week.
The dried caulking material was peeled off from the coated metal plate by hand, and those that were easily peeled were evaluated as “◯”, and those that did not peel were evaluated as “x”.
As the caulking material, a one-component modified silicone caulking material (SR seal S70; Sunrise MSI Co., Ltd.) or a urethane caulking material (FC700; Nichiha Corp.) was used. In addition, the primer was applied in order to make the conditions close to the actual construction conditions in consideration of the fact that the primer is often applied unintentionally to the surface that will receive the caulking material during actual construction. It is.
　被覆金属板１～１６の評価結果を、表２に示す。 The evaluation results of the coated metal plates 1 to 16 are shown in Table 2.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表２に示されるように、体積抵抗率が１．０×１０１７Ω・ｃｍ以下であり、かつ表面自由エネルギーが３６．６ｍＪ／ｍ２以下である被覆層を有する被覆金属板１～５は、ウレタン系コーキング材およびシリコーン系コーキング材のいずれに対しても暴露後の非接着性が良好であることがわかる。 As shown in Table 2, coated metal plates 1 to 5 having a coating layer having a volume resistivity of 1.0 × 10 17 Ω · cm or less and a surface free energy of 36.6 mJ / m 2 or less are as follows: It can be seen that the non-adhesiveness after exposure is good for both the urethane-based caulking material and the silicone-based caulking material.
　これに対して、体積抵抗率と表面自由エネルギーの少なくとも一方が、本願範囲外である被覆層を有する被覆金属板６～１６は、ウレタン系コーキング材およびシリコーン系コーキング材のいずれに対しても暴露後の非接着性が低いことがわかる。 In contrast, the coated metal plates 6 to 16 having a coating layer in which at least one of volume resistivity and surface free energy is outside the scope of the present application are exposed to both urethane-based caulking materials and silicone-based caulking materials. It can be seen that the subsequent non-adhesiveness is low.
　本出願は、２０１８年３月２９日出願の特願２０１８－０６５０１１に基づく優先権を主張する。当該出願明細書および図面に記載された内容は、すべて本願明細書に援用される。 This application claims priority based on Japanese Patent Application No. 2018-065011 filed on Mar. 29, 2018. The contents described in the application specification and the drawings are all incorporated herein.
　本発明によれば、屋外に放置した後であっても、コーキング材に対する非接着性を維持する被覆金属板を提供することができる。そのような被覆金属板は、コーキング材に対する非接着性を良好に維持することができ、三面接着を抑制できるジョイナーとして好適である。 According to the present invention, it is possible to provide a coated metal plate that maintains non-adhesiveness to a caulking material even after being left outdoors. Such a coated metal plate can favorably maintain non-adhesiveness to the caulking material and is suitable as a joiner that can suppress three-sided adhesion.
　１０　被覆金属板
　１１　金属板
　１３　被覆層
　２０　ジョイナー
　２１　凸条部
　２１Ａ　頂面
　２３　基板部
　３０　目地部
　４０　コーキング材
　５０　外装材 DESCRIPTION OF SYMBOLS 10 Coated metal plate 11 Metal plate 13 Coating layer 20 Joiner 21 Projection part 21A Top surface 23 Substrate part 30 Joint part 40 Caulking material 50 Exterior material

Claims (7)

  1. 　金属板と、
    　前記金属板の表面に配置された、樹脂を含む被覆層と、を有し、
    　前記被覆層の、ＪＩＳ Ｃ ２１３９：２００８に準拠して測定される体積抵抗率が１．０×１０１７Ω・ｃｍ以下であり、かつＪＩＳ Ｒ ３２５７：１９９９に準拠して測定される接触角に基づいてＫａｅｌｂｌｅ－Ｕｙ式から算出される表面自由エネルギーが３６．６ｍＪ／ｍ２以下である、
    　被覆金属板。     A metal plate,
    A coating layer containing a resin, disposed on the surface of the metal plate,
    The volume resistivity measured according to JIS C 2139: 2008 of the coating layer is 1.0 × 10 17 Ω · cm or less, and the contact angle is measured according to JIS R 3257: 1999. The surface free energy calculated from the Kaelble-Uy formula based on is 36.6 mJ / m 2 or less,
    Coated metal plate.
  2. 　前記樹脂は、エチレン・酢酸ビニル共重合体またはシリコーンゴムである、
    　請求項１に記載の被覆金属板。     The resin is an ethylene / vinyl acetate copolymer or silicone rubber,
    The coated metal plate according to claim 1.
  3. 　前記樹脂は、エチレン・酢酸ビニル共重合体であり、
    　前記エチレン・酢酸ビニル共重合体の酢酸ビニル由来の構造単位の含有比率は、前記エチレン・酢酸ビニル共重合体を構成する全構造単位に対して５質量％以上２０質量％未満である、
    　請求項２に記載の被覆金属板。     The resin is an ethylene / vinyl acetate copolymer,
    The content ratio of the structural unit derived from vinyl acetate of the ethylene / vinyl acetate copolymer is 5% by mass or more and less than 20% by mass with respect to all the structural units constituting the ethylene / vinyl acetate copolymer.
    The coated metal plate according to claim 2.
  4. 　前記被覆層の厚みは、３～１２０μｍである、
    　請求項１～３のいずれか一項に記載の被覆金属板。     The coating layer has a thickness of 3 to 120 μm.
    The coated metal plate according to any one of claims 1 to 3.
  5. 　前記金属板は、前記被覆層が配置される面に配置された化成処理皮膜を有する、
    　請求項１～４のいずれか一項に記載の被覆金属板。     The metal plate has a chemical conversion treatment film disposed on a surface on which the coating layer is disposed.
    The coated metal plate according to any one of claims 1 to 4.
  6. 　隣り合う外装材の目地部に配置されるための、請求項１～５のいずれか一項に記載の被覆金属板を有する、ジョイナー。 A joiner having the coated metal plate according to any one of claims 1 to 5, which is disposed on a joint portion of an adjacent exterior material.
  7. 　前記ジョイナーは、凸条部と、前記凸条部の基端部と接続された基板部と、を有し、
    　前記凸条部のうち少なくとも前記コーキング材を支持するための面には、前記被覆層が配置されている、
    　請求項６に記載のジョイナー。     The joiner has a ridge portion and a substrate portion connected to a base end portion of the ridge portion,
    The coating layer is disposed on a surface for supporting at least the caulking material in the ridges.
    The joiner according to claim 6.
PCT/JP2018/020256 2018-03-29 2018-05-28 Coated metal plate and joiner having same WO2019187175A1 (en)

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