TW201941943A - Coated metal plate and joiner having same - Google Patents

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 * 10<SP>17</SP> [Omega].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

Covered metal plate, adapter with same, and anti-adhesive tape

The present invention relates to a coated metal plate, a connector having the same, and an anti-adhesive tape.

The adapter is used for the seam portion between the outer packaging boards in the outer packaging of the building. The adapter has a function of holding the outer packaging plate at a certain interval.

The joints between the outer packaging boards are filled with a gap filler material to ensure water resistance and air tightness. At this time, if the gap filler material and the two end faces of the two outer packaging plates are bonded to the adapter on three sides, the outer packaging plate will expand and contract according to changes in the external environment (especially temperature changes), so the gap filler material cannot follow the outer packaging The expansion and contraction of the plate, the stress generated by the expansion and contraction of the outer packaging plate is concentrated in the interstitial material, which causes the interstitial material to easily break.

In order to eliminate such a problem, the interstitial material is adhered to the side end surfaces of two adjacent outer packaging plates, but is not adhered to the adapter, that is, double-sided adhesion.

As a method of performing double-sided bonding, a method of forming a coating film having a low adhesiveness with respect to the interstitial material on the surface (the receiving portion of the interstitial material) of the adapter that is in contact with the interstitial material is being studied. For example, a coupler having a coating film containing a specific fluororesin on a surface in contact with a gap filler (see Patent Document 1) or a coupler having a coating film containing low-density polyethylene or polypropylene (see Patent) Reference 2). In addition, a three-sided adhesion prevention tape containing a polyolefin such as polyethylene and adjusting the adhesion and tensile strength to a predetermined range is disclosed (for example, Patent Document 3).
[Prior Art Literature]
[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2009-62707
[Patent Document 2] Japanese Patent Laid-Open No. 2004-68464
[Patent Document 3] Japanese Patent Laid-Open No. 2004-108011

[Problems to be Solved by the Invention]

However, the adapter may be placed outdoors after being moved into the construction site until construction of the building exterior packaging. During this period, the surface of the adapter that is in contact with the interstitial material is likely to adhere to the interstitial material, and there is a problem that three-sided adhesion occurs during the construction of the building outer packaging. The same problems are also encountered with the adapters shown in Patent Documents 1 and 2 or the adapters obtained by using the tape of Patent Literature 3.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a coated metal plate capable of maintaining low adhesiveness with respect to an interstitial material even after being placed outdoors, a connector having the same, and an anti-adhesive tape.
[Means for solving problems]

The present invention relates to a coated metal plate having the following structure, an adapter using the same, and an anti-adhesive tape.
[1] A coated metal plate comprising: a metal plate; and a coating layer disposed on the surface of the metal plate and containing a resin, the coating layer being in accordance with Japanese Industrial Standards (JIS) C 2139: 2008 The measured volume resistivity is 1.0 × 10 ¹⁷ Ω · cm or less, and the surface free energy calculated based on the contact angle measured according to JIS R 3257: 1999 and based on the Kaelble-Uy formula is 36.6 mJ / m ² or less.
[2] The coated metal plate according to [1], wherein the resin is an ethylene · vinyl acetate copolymer.
[3] The coated metal plate according to [1], wherein the resin is a silicone rubber.
[4] The coated metal plate according to [2], in which the ethylene-vinyl acetate copolymer-derived structural unit is derived from all the structural units constituting the ethylene-vinyl acetate copolymer The content ratio of N is 5% by mass or more and less than 20% by mass.
[5] The coated metal plate according to any one of [1] to [4], wherein the coating layer further comprises a slip agent.
[6] The coated metal plate according to any one of [1] to [5], wherein a thickness of the coating layer is 3 μm to 120 μm.
[7] The coated metal plate according to any one of [1] to [6], wherein the metal plate has a chemical conversion treatment film disposed on a configured surface of the coating layer.
[8] An adapter that is arranged at a seam portion of an adjacent outer packaging material and has a coated metal plate according to any one of [1] to [7].
[9] The adapter according to [8], wherein the adapter has a ridge portion and a substrate portion connected to a base end portion of the ridge portion, and at least one of the ridge portions is used for The cover layer is disposed on a surface supporting the interstitial material.
[10] An anti-adhesive tape having a release film, an adhesive layer, and a coating layer in this order, the coating layer includes a resin, and the volume resistivity of the coating layer measured according to JIS C 2139: 2008 is 1.0 × 10 ¹⁷ Ω · cm or less, and the surface free energy calculated based on the contact angle measured in accordance with JIS R 3257: 1999 and based on the Kaelble-Uy formula is 36.6 mJ / m ² or less.
[11] The anti-adhesive tape according to [10], wherein the resin is an ethylene · vinyl acetate copolymer.
[12] The anti-adhesive tape according to [10], wherein the resin is a silicone rubber.
[Effect of the invention]

According to the present invention, it is possible to provide a coated metal plate capable of maintaining non-adhesion with respect to a gap filler material even after being left outdoors, an adapter having the same, and an anti-adhesive tape.

The present inventors have analyzed and studied the reason why the conventional adapter shown in Patent Document 1 or Patent Document 2 is easy to be connected to the gap filler material after being placed outdoors. Although the details of the result are not clear, it is inferred that the following phenomenon.

That is, during the time when the adapter is placed outdoors, it is thought that dirt such as dust or dust adheres (flyes) to the coating film on the surface of the adapter, and the dirt is fixed by light, moisture, heat, etc., outdoors. . Furthermore, it is thought that the fixed dirt becomes a starting point, and it is easy to attach a gap filler.

That is, in order to maintain the non-adhesion to the interstitial material, it is effective to maintain a surface state where dirt is difficult to be fixed. Therefore, it is considered effective to 1) reduce the chargeability of the coating film surface, and 2) reduce the coating film surface. Surface energy. In addition, the present inventors have studied various materials and found that, specifically, if 1) the volume resistivity measured in accordance with JIS C 2139: 2008 is 1.0 × 10 ¹⁷ Ω · cm or less, and 2) the basis The contact angle measured according to JIS R 3257: 1999 and the surface free energy calculated according to the Kaelble-Uy formula is 36.6 mJ / m ² or less. It is difficult to fix the dirt, and it is possible to maintain the Then sex.

Furthermore, it has been found that, among the materials satisfying these physical properties, although the ethylene-vinyl acetate copolymer is generally a material commonly used in sealants or adhesive applications, it is particularly difficult for dirt to be fixed to the surface of the coating film when it is placed outdoors. Good non-adhesion to interstitial materials. This invention is based on such knowledge.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1. Covered Metal Plate FIG. 1 is a cross-sectional view showing the structure of a covered metal plate according to this embodiment.

As shown in FIG. 1, the coated metal plate 10 according to this embodiment includes a metal plate 11 and a coating layer 13 disposed on the surface thereof.

(Metal plate 11)
The metal plate 11 as the coating original plate can be appropriately selected according to the application of the coating metal plate. Examples of the metal plate 11 include plated steel plates such as galvanized steel plates, Zn-Al alloy plated steel plates, Zn-Al-Mg alloy plated steel plates, and aluminum plated steel plates; cold-rolled steel plates, and stainless steel plates Steel plates such as iron (austenite), martensite, ferrite, and two phases of ferrous iron and Asita loose iron; aluminum plates; aluminum alloy plates; and copper plates. Among these, from the viewpoint of improving the corrosion resistance, the metal plate 11 is preferably a plated steel plate, and more preferably a molten plated steel plate. There is no particular limitation on the plating adhesion amount of the plated steel sheet, and it may be, for example, 30 g / m ^{2 to} 500 g / m ² .

From the viewpoint of improving the corrosion resistance and coating film adhesion of the coated steel sheet, the metal plate 11 may be subjected to a chemical conversion treatment on its surface. The type of the chemical conversion treatment is not particularly limited, and examples thereof include chromate treatment, chromium-free treatment, and phosphate treatment.

The thickness of the metal plate 11 is not particularly limited as long as it is set according to the application or workability. For example, from the viewpoint of obtaining the required workability or mechanical strength when the adapter is manufactured, it is preferably 0.3 mm to 0.6. mm.

The chemical conversion treatment can be performed by a known method. For example, the chemical conversion treatment solution may be applied to the surface of the steel sheet by a method such as a roll coating method, a spin coating method, or a spray method, and may be dried without being washed with water. The drying temperature and drying time are not particularly limited as long as the water can be evaporated. From the viewpoint of productivity, the drying temperature is preferably in the range of 60 ° C to 150 ° C, and the drying time is preferably in the range of 2 seconds to 10 seconds. The amount of adhesion of the chemical conversion treatment film is not particularly limited as long as it is within a range effective for improving the corrosion resistance and the adhesion of the coating film. For example, in the case of a chromate film, the amount of adhesion may be adjusted so that the total amount of Cr conversion is 5 mg / m ² to 100 mg / m ² . In addition, in the case of a chromium-free film, if it is a titanium-molybdenum composite film, it is only necessary to adjust the amount of adhesion so as to fall within a range of 10 mg / m ² to 500 mg / m ² . For the film, the amount of adhesion may be adjusted so that the amount of adhesion in terms of fluorine or the amount of adhesion in terms of total metal elements falls within a range of 3 mg / m ² to 100 mg / m ² . In the case of a phosphate film, the amount of adhesion may be adjusted so as to be 5 mg / m ² to 500 mg / m ² .

(Cover layer 13)
The coating layer 13 is a layer (resin layer) which is arranged on at least a part of the surface of the metal plate 11 and contains a resin. The covering layer 13 becomes the outermost layer of the covering metal plate 10. From the viewpoint of maintaining non-adhesion with the interstitial material, the covering layer 13 can be 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.

When the volume resistivity of the coating layer 13 is 1.0 × 10 ¹⁷ Ω · cm or less, the coating layer 13 is difficult to be charged, and thus static electricity is difficult to be generated. Dirt and the like can be hardly adhered during exposure to the outdoors. The volume resistivity of the coating layer 13 is more preferably 4.0 × 10 ^{1 6} Ω · cm or less. The lower limit value of the volume resistivity of the coating layer 13 is not particularly limited, and may be, for example, about 1.0 × 10 ^{1 2} Ω · cm.

The volume resistivity of the coating layer 13 can be measured in accordance with JIS C 2139: 2008 "Solid Electrical Insulation Materials-Measurement Methods for Volume Resistivity and Surface Resistivity" (IEC 60093: 1980). Specifically, the measurement can be performed under the following conditions.
(Test conditions)
Test device: Digital ultra-high resistance / micro galvanometer type 8340A (manufactured by ADC)
Electrode size: main electrode 50 mmΦ, guard electrode inner diameter 60 mmΦ, outer diameter 80 mmΦ
Applied voltage: 100 V, 500 V (DC)
Application time: 60 sec
Test environment: temperature 23 ℃ ± 2 ℃, humidity 50% RH ± 5% RH
Test piece size: 100 mm × 100 mm

If the surface free energy of the coating layer 13 is 36.6 mJ / m ² or less, the reactivity of the surface of the coating layer 13 is low. Therefore, even if dirt adheres to the coating layer 13 during outdoor exposure, the surface reactivity is also low. This makes it 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 lower limit value of the surface free energy of the coating layer 13 is not particularly limited, and may be, for example, 16.0 mJ / m ² .

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 measure using the following procedures.
1) The contact angle of pure water and diiodomethane was measured in accordance with JIS R 3257: 1999 "Test method for surface wettability of substrate glass". As the measuring device, a portable contact angle meter PCA-1 (manufactured by Kyowa Interface Science Co., Ltd.) can be used.
2) Using the obtained contact angle values, according to the Kaelble-Uy formula (γs = γs ^d + γs ^p , γs ^d : the dispersed component of the surface free energy, γs ^p : the polar component of the surface free energy) To calculate the surface free energy.

The volume resistivity and surface free energy of the coating layer 13 can be adjusted according to 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 it has a volume resistivity and a surface free energy satisfying the above ranges, and may be an ethylene-vinyl acetate copolymer, a silicone rubber, or the like.

[Ethylene · vinyl acetate copolymer]
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 the adhesiveness is not exhibited and low chargeability is obtained, and it is preferably 5 masses relative to all the structural units constituting the ethylene-vinyl acetate copolymer. % Or more and less than 20% by mass. When the content ratio of the structural unit derived from vinyl acetate is 5 mass% or more, it is easy to obtain a low volume resistivity, and therefore it is easy to obtain a low chargeability, and it is difficult for dirt to adhere to the surface of the coating layer 13. When the content ratio of the structural unit derived from vinyl acetate is less than 20% by mass, it is difficult to exhibit adhesiveness, and thus it is difficult to make dirt adhere to the surface of the coating layer 13. The content ratio of the structural unit derived from vinyl acetate is more preferably 5 to 17 mass% with respect to all the structural units constituting the ethylene-vinyl acetate copolymer.

The ethylene-vinyl acetate copolymer may further contain a structural unit derived from monomers other than ethylene and vinyl acetate. Examples of other monomers include propylene, 1-butene, 3-methyl-1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1 Α-olefins having 3 to 20 carbons such as decene, (meth) acrylic acid, (meth) acrylate, and styrene. The content ratio of the structural unit derived from another monomer with respect to all the structural units which comprise an ethylene-vinyl acetate copolymer becomes like this. Preferably it is 10 mass% or less, More preferably, it is 0 mass%.

The melt flow rate (MFR) (JIS K7210-1999, 190 ° C, 2160 g load) of the ethylene · vinyl acetate copolymer is preferably 1 g / 10 min to 20 g / 10 min. When the MFR of the ethylene vinyl acetate copolymer is within the above range, it is easy to maintain sheet formability. The MFR of the ethylene · vinyl acetate copolymer is more preferably 5 g / 10 min to 15 g / 10 min.

〔Silicone rubber〕
The silicone rubber is not particularly limited, and may be a cured product of an addition reaction curing type or a condensation curing type silicone rubber composition.

The hardened product of the addition reaction hardening type silicone rubber composition can contain a polyorganosiloxane having two or more alkenyl groups (preferably vinyl groups) as a crosslinkable reactive group in one molecule, and a hardener. Obtained by curing (addition hardening) a silicone rubber composition.

The polyorganosiloxane having two or more alkenyl groups (preferably vinyl groups) as a crosslinkable reactive group in one molecule is preferably a polyorganosiloxane represented by the following formula (1).

R _n SiO _{(4-n) / 2} ･ ･ ･ (1)

In the formula (1), R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms. Among them, at least two of the plurality of R are alkenyl (preferably vinyl). 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 hydrogen atoms of these groups substituted with a halogen atom or the like. Among them, methyl, vinyl, phenyl, or trifluoropropyl is preferred, and methyl is more preferred. A plurality of Rs may be the same as or different from each other. n is a positive number from 1.95 to 2.05.

The hardener (crosslinking agent) may be an addition reaction hardener. The addition reaction hardener may be a silane compound such as an organic hydrogenated polysiloxane.

The silicone rubber composition may further include a reaction catalyst, a silicone oil, and the like, if necessary. The reaction catalyst includes platinum-based catalysts such as platinum metal particles, platinum chloride, and chloroplatinic acid. Silicone oil is a liquid silicone oil with a polyorganosiloxane as the main skeleton. Examples thereof include dimethyl silicone oil having only a methyl group as an organic group; or a part of the methyl group is phenyl or ethylene Modified silicone oil substituted with alkyl, alkyl, aralkyl, amine, carboxyl, epoxy, hydroxyl, polyoxyalkylene, etc. The total amount of these components may be 10% by mass or less based on the total solid content of the silicone rubber composition.

The hardened product of the condensation-hardening type silicone rubber composition can have polydiorganopolysiloxane containing silicon atoms bonded by two or more hydroxyl groups in one molecule and three or more condensation properties in one molecule. A functional group silane compound and a condensation catalyst silicone rubber composition are obtained by curing (condensation curing).

Diorganopolysiloxanes having silicon atoms bonded by two or more hydroxyl groups in one molecule include organic groups bonded to Si atoms, such as alkyl groups such as methyl and ethyl; aryl groups such as phenyl and tolyl ; Diorganopolysiloxanes of cycloalkyl groups such as cyclohexyl.

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)

Preferably, (wherein 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 propyleneoxy group, or an ethoxy group. M represents 0 or 1. n represents 3 or 4. Among them, when m is 0, n is 4 and m is 1, n is 3).

Examples of the condensation catalyst include titanium compounds such as titanium tetraisopropoxide and titanium tetra-n-butoxy.

Examples of the silicone rubber composition include S Coat 57 manufactured by Shin-Etsu Chemical Co., and the like.

Among these, from the viewpoint of easily obtaining non-adhesion to the interstitial material, the resin constituting the coating layer 13 is preferably an ethylene-vinyl acetate copolymer.

The composition of the coating layer 13 is not limited to these. For example, even if it is a resin (for example, polyethylene or polypropylene) whose volume resistivity does not satisfy the above range, by combining with a conductive material such as carbon black, the volume resistivity and surface free energy of the entire coating layer 13 can satisfy the requirements.述 范围。 The range.

〔Other ingredients〕
As long as the effect of the present invention is not impaired, the coating layer 13 may further include components other than the resin. Examples of other ingredients include slip agents or coloring pigments, extender pigments, and aggregates.

The slipping agent (lubricant) is not particularly limited as long as it can further improve the non-adhesion between the coating layer and the interstitial material.

Examples of slip agents include:
Natural waxes such as natural paraffin and carnauba wax, or waxes such as polyolefin waxes such as synthetic paraffin and polyethylene;
Natural and synthetic oils such as aromatic oils, naphthenic oils, paraffin oils, mineral oils, vegetable oils, and silicone oils;
Higher fatty acids or metals such as capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, arabic acid, behenic acid, etc. Salt
Aliphatic alcohols such as palmityl, cetyl alcohol, stearyl alcohol;
Fatty acid ammonium such as ammonium caproate, ammonium caprylate, ammonium caprate, ammonium laurate, ammonium myristate, ammonium palmitate, ammonium stearate, etc .;
Esters such as alcohol esters of fatty acids;
Fluoroalkyl carboxylic acid or metal salt thereof;
Fluorine compounds such as metal fluoroalkylsulfonic acid salts. Among them, fatty acid amide is preferred from the viewpoint of having a surface modification effect with a small amount of preparation, and further improving the non-adhesion between the coating layer and the interstitial material.

The content of the slipping agent with respect to the resin is, for example, 3% by mass to 30% by mass, and preferably 7% by mass to 30% by mass. When the content of the slipping agent is 7% by mass or more, the non-adhesion between the coating layer 13 and the interstitial material can be easily improved, and when it is 30% by mass or less, the adhesion to the metal plate is not easily impaired.

Examples of colored pigments include titanium oxide, calcium carbonate, carbon black, iron black, titanium yellow, colcothar, Prussian blue, cobalt blue, cerulean blue, ultramarine blue), cobalt green, molybdenum red and other inorganic pigments; CoAl, CoCrAl, CoCrZnMgAl, CoNiZnTi, CoCrZnTi, NiSbTi, CrSbTi, FeCrZnNi, MnSbTi, FeCr, FeCrNi, FeNi, FeCrNiMn, CoCr, Mn, Co, SnZnTi Composite oxide calcined pigments such as metal components; metal pigments such as Al, resin-coated Al, Ni; and lithol red B (brilliant scarlet G), pigments Scarlet 3B (pigment scarlet 3B), bright carmine 6B (brilliant carmine 6B), lake red C (lake red C), lake red D, permanent red 4R (permanent red 4R), bordeaux 10B (bordeaux 10B), Fast yellow G, fast yellow 10G, para red, watching red, benzidine yellow, benzidine orange, chestnut red L bon maroon L), chestnut red M, bright fast scarlet, vermilion red, phthalocyanine blue, phthalocyanine green, fast sky blue, aniline black (Aniline black) and other organic pigments. Examples of the extender pigment include barium sulfate, titanium oxide, silicon dioxide, and calcium carbonate. Examples of the aggregate include resin particles; or inorganic particles including inorganic compounds such as glass, silicon carbide, boron nitride, zirconia, alumina, and silicon dioxide. When the coating layer 13 includes a silicone rubber, a silicone oil or the like may be included 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 the non-adhesiveness with respect to the interstitial material when used as a connector, and is preferably 3 μm to 120 μm. When the thickness of the coating layer 13 is 3 μm or more, the non-adhesion to the gap filler material can be easily maintained when used as a connector. When the thickness of the coating layer 13 is 120 μm or less, the coating layer 13 is formed by coating, for example, In this case, it is easy to prevent the appearance of the coated metal plate 10 from being caused by the occurrence of wrinkles when the paint is dried. From this viewpoint, the thickness of the coating layer 13 is more preferably 5 μm to 100 μm.

(Other layers)
The coated metal plate 10 of the present invention may further include another layer (not shown) such as a primer coating film or an adhesive layer between the metal plate 11 and the coating layer 13 as necessary.

[Primer coating film]
The primer coating film may be arranged on the surface of a metal plate or a chemical conversion treatment film. The primer coating film can improve the adhesion of the coating layer or the corrosion resistance of the coated metal plate.

The type of the resin (matrix resin) constituting the primer coating film is not particularly limited. Examples of the resin constituting the primer coating film include epoxy resin, acrylic resin, polyester resin, and the like. The primer coating film may further include an aggregate, an anti-rust pigment, and the like, as necessary. Such a primer coating film can be formed by applying a primer coating on a metal plate and then calcining it at 200 ° C to 250 ° C for 30 seconds to 120 seconds.

[Adhesive layer]
The adhesive layer is not particularly limited, and may be a cured product of a thermosetting adhesive such as a melamine-based adhesive, an epoxy-based adhesive, or various elastic system adhesives.

2. Manufacturing method of a coated metal plate The coated metal plate of the present invention can be manufactured by any method. The coated metal plate 10 of the present invention can be obtained by, for example, laminating a film of the resin composition for a coating layer on the metal plate 11 and then performing thermocompression bonding (thermal lamination) to form the coating layer 13 (thermocompression method); The film is formed by laminating the film to form the coating layer 13 on the metal plate 11 via an adhesive (adhesion method); the molten material of the resin composition for the coating layer is cast on the metal plate 11 and then cooled to form the coating layer 13 (Extrusion casting method); or the resin composition for a coating layer may be coated on the metal plate 11 and then dried or heated to form the coating layer 13 (coating method).

For example, the coating layer 13 containing an ethylene · vinyl acetate copolymer can be used for thermocompression bonding a film containing an ethylene · vinyl acetate copolymer on a metal plate 11 (thermocompression method), or copolymerizing an ethylene · vinyl acetate copolymer. The coating layer for the product is formed by melting and casting the resin composition and then cooling (extrusion casting method). The conditions for the thermocompression bonding in the thermocompression bonding method are not particularly limited, and may be, for example, 100 ° C to 200 ° C.

In addition, the coating layer 13 containing a silicone rubber may be formed on the metal plate 11 by coating the resin composition for a coating layer containing a silicone-based coating composition and then drying or heating and curing at room temperature. The coating method of the resin composition for a coating layer is not particularly limited, and examples thereof include a roll coating method, a flow coating method, a curtain coating method, and a spray method. The heat curing conditions may be sufficient to sufficiently harden the reaction-curable silicone rubber in the resin composition for a coating layer, and may be, for example, 25 ° C to 300 ° C.

The covering layer 13 may be disposed on the entire surface of the metal plate 11 or may be disposed only on a portion (a top surface 21A of the ridge portion 21 described later) that becomes a receiving portion of the gap filler material when the adapter 20 described later is manufactured. Such a coated metal plate can be preferably used as a coated metal plate for an adapter, for example.

3. Splicer The splicer of the present invention is a splicer (joint material) arranged at a seam portion of an adjacent outer packaging material, and includes a coated metal plate of the present invention.

FIG. 2 is a partial perspective view showing an example of a use state of the adapter 20. 3A and 3B are cross-sectional views showing a configuration example of the adapter 20.

As shown in FIG. 2, the adapter 20 includes a coated metal plate 10 having a hat shape in cross section. Such an adapter 20 is also referred to as a hat adapter. The adapter 20 includes a ridge portion 21 and two substrate portions 23 connected to a base end portion of the ridge portion 21. The ridge portion 21 is arranged at the joint portion 30 of the building outer package, and can support the gap filler material 40 (which can be a receiving portion of the gap filler material 40). The two substrate portions 23 can maintain the interval (the width of the seam portion 30) between the ends of two adjacent outer packaging materials 50 at a certain interval.

The coating layer 13 may be disposed on at least the surface (top surface) 21A of the convex portion 21 that is in contact with the gap filler material on the surface of the adapter 20. That is, the coating layer 13 may be arranged on the entire surface of the adapter 20 (see FIG. 3A), or may be arranged only on the surface (top surface) 21A (see FIG. 3B) of the ridge portion 21 that supports the gap filler.

The adapter 20 can be manufactured by any method. For example, the adapter 20 can be obtained by forming the coated metal plate 10 having the metal plate 11 and the covering layer 13 by press processing or the like; or the metal plate 11 can be formed by press processing or the like at the convex portion 21 It is obtained by forming a covering layer 13 on the top surface 21A.

In the case where the covering layer 13 is formed on the top surface 21A of the ridge portion 21 after the metal plate 11 is formed by pressing or the like, the covering layer 13 can be formed using an anti-adhesive tape described later, for example.

4. Anti-adhesive tape FIG. 4 is a cross-sectional view showing the configuration of the anti-adhesive tape 60.

As shown in FIG. 4, the anti-adhesive tape 60 includes a release film 61, an adhesive layer 62, and a coating layer 13.

(Release film 61)
The release film 61 protects the adhesive layer 62 and is peeled off during use. The release film 61 is not particularly limited, and may be, for example, a known resin film such as a polyester film.

(Adhesive layer 62)
The adhesive layer 62 includes an adhesive composition containing an adhesive. Examples of the adhesive include acrylic adhesives, vinyl ether-based adhesives, silicon-based adhesives, and rubber-based adhesives.

The adhesive composition may further include various additives other than the adhesive. Examples of such additives include a cross-linking agent or an adhesion-imparting agent, a plasticizer, a filler, an anti-aging agent, and the like depending on the type of the adhesive.

The thickness of the adhesive layer 62 may be such that the coating layer 13 can be fixed to a predetermined area of the metal plate 11 (the area that becomes the top surface 21A of the protruding portion 21 of the adapter 20). For example, it can be set to 10 μm ～ 100 μm.

(Cover layer 13)
The composition, thickness, and the like of the coating layer 13 are the same as described above.

(Other layers)
The anti-adhesive tape 60 of the present invention may further include another layer such as a second release film (not shown) for protecting the coating layer 13 as necessary. The second release film may be the same as the release film 61.

The anti-adhesive tape 60 can be manufactured by, for example, applying an adhesive composition on the release film 61 to form an adhesive layer 62 and then laminating the coating layer 13.

Such an anti-adhesive tape 60 can be used as follows, for example. That is, the release film 61 is peeled from the anti-adhesive tape 60. Then, the exposed adhesive layer 62 is disposed on the surface of the formed metal plate 11 on which the interstitial material is disposed (the surface that becomes the top surface 21A of the ridge portion 21 of the adapter 20). Then, by peeling the second release film, the coating layer 13 can be formed on the surface of the convex portion.
[Example]

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

1-1. Preparation of coating material (film 1 to film 7)
The pellets of the ethylene · vinyl acetate copolymer having the vinyl acetate content ratio shown in Table 1 were set between presses, heated and press-molded at a melting temperature of the ethylene · vinyl acetate copolymer + 30 ° C, and Films 1 to 7 each having a thickness of 50 μm including an ethylene · vinyl acetate copolymer were obtained.

The compositions of the films 1 to 7 are shown in Table 1.
[Table 1]

Among them, the melt flow rate (JIS K7210-1999, 190 ° C, 2160 g load) of the film 3 was 9.0 g / 10 min.

(Film 8 to 13)
Film 8: Polystyrene film (PS) (manufactured by Asahi Kasei Chemicals, OPS (registered trademark) film, thickness 50 μm)
Film 9: High-density polyethylene film (HDPE) (manufactured by Nitto L Materials, Polyethylene Masker, thickness 10 μm)
Membrane 10: PVdC (manufactured by Asahi Kasei Corporation, Salan (registered trademark) UB, thickness 25 μm)
Film 11: Polypropylene film (PP) (manufactured by Toray Film Processing Co., Torayfan (registered trademark) NO, thickness 50 μm)
Membrane 12: Polymethyl methacrylate film (PMMA) (manufactured by Mitsubishi Chemical Corporation, AcryplenTM, thickness 50 μm)
Film 13: Polycarbonate film (PC) (manufactured by Teijin Corporation, Pureace (registered trademark), thickness 100 μm)

(Paints 1 to 3)
Paint 1: Silicone paint (manufactured by Shin-Etsu Chemical Co., silicone rubber S Coat 57)
Paint 2: Silicone paint (manufactured by Shin-Etsu Chemical Co., silicone resin KR-300)
Coating 3: Epoxy resin coating (manufactured by Nippon Paint Industrial Coatings Co., Ltd., Nippon Paint Power Bind)

1-2. Production and evaluation of coated metal plates (preparation of chemically treated metal plates)
As the coating original plate (metal plate), a 0.35 μm-thick steel plate plated with molten 55% Al-45% Zn alloy (150 g / m ^{2 on} both sides) was prepared.
This plated steel sheet was subjected to alkali degreasing. Next, a coating type chromate treatment liquid (Surfcoat NRC300, manufactured by Nihon Paint Co., Ltd.) was applied to the surface of the obtained plated steel plate as a pre-coating treatment, and the temperature was reached at 100 ° C. By heating, a chemical conversion treatment film having a total chromium equivalent adhesion amount of 40 mg / m ² was formed, thereby obtaining a chemical conversion treatment metal plate.

(Fabrication of coated metal plate 1 to coated metal plate 4 and coated metal plate 8 to coated metal plate 10)
The film shown in Table 2 was placed on the obtained chemical conversion treatment film of the chemical conversion treatment metal plate, and the ethylene · vinyl acetate copolymer was temporarily adhered at a glass transition temperature (Tg) + 40 ° C by a thermal lamination method, and further Using an oven, heating was performed at a glass transition temperature (Tg) + 80 ° C. for 60 seconds to form a coating layer having a thickness of 50 μm, thereby obtaining a coated metal plate 1 to a coated metal plate 4 and a coated metal plate 8 to a coated metal plate 10.

(Production of coated metal plate 5)
After the coating material shown in Table 2 was applied to the obtained chemical conversion treatment film of the chemical conversion treatment metal plate, it was dried at room temperature for 1 week to form a coating layer having a thickness of 100 μm, thereby obtaining a coated metal plate 5.

(Production of coated metal plate 11)
The coating film shown in Table 2 was applied to the obtained chemical conversion treatment film of the chemical conversion treatment metal plate, and then heated at 300 ° C. to form a coating layer having a thickness of 5 μm to obtain a coated metal plate 11.

(Production of Covered Metal Plate 6, Covered Metal Plate 12, and Covered Metal Plate 14)
Except having changed the ethylene vinyl acetate copolymer film 1 to the film shown in Table 2, it carried out similarly to the coated metal plate 1, and obtained the coated metal plate 6, the coated metal plate 12, and the coated metal plate 14. The thermal lamination (temporarily followed) was performed at a resin's glass transition temperature (Tg) + 40 ° C, and heating in an oven was performed at a resin's glass transition temperature (Tg) + 80 ° C.

(Fabrication of coated metal plate 7, coated metal plate 13, coated metal plate 15)
A coated metal plate 7, a coated metal plate 13, or a coated metal plate 15 is obtained on the obtained chemical conversion treatment film of the chemical conversion treatment metal plate through an adhesive bonding film 9, film 11, or film 13.

(Production of coated metal plate 16)
The coating film shown in Table 2 was applied to the obtained chemical conversion treatment film of the chemical conversion treatment metal plate, and then heated at 200 ° C. to form a coating layer having a thickness of 5 μm to obtain a coated metal plate 16.

The volume resistivity and surface free energy of the coating layers in the obtained coated metal plates 1 to 16 were measured by the following methods.

(Volume resistivity)
The volume resistivity of the coating layer was measured in accordance with JIS C 2139: 2008 "Solid Electrical Insulation Materials-Measurement Methods for Volume Resistivity and Surface Resistivity". The measurement was performed under the following conditions.
(Test conditions)
Test device: Digital ultra-high resistance / micro galvanometer type 8340A (manufactured by ADC)
Electrode size: main electrode 50 mmΦ, protective electrode inner diameter 60 mmΦ, outer diameter 80 mmΦ
Applied voltage: 100 V, 500 V (DC)
Application time: 60 sec
Test environment: temperature 23 ℃ ± 2 ℃, humidity 50% RH ± 5% RH
Test piece size: 100 mm × 100 mm
Number of trials: n = 3

(Surface free energy)
The contact angle of pure water and diiodomethane was measured in accordance with JIS R 3257: 1999 "Test method for wettability of the surface of a substrate glass". The measurement was performed using a portable contact angle meter PCA-1 (manufactured by Kyowa Interface Science Co., Ltd.). The value of the obtained contact angle and the Kaelble-Uy formula were used to calculate the surface free energy.

Furthermore, the following methods were used to measure the non-adhesion of the coated metal plate 1 to the coated metal plate 16 with respect to the interstitial material after the exposure.

(Relative to non-adhesion of interstitial material)
With respect to the obtained coated metal plate, the exposure angle was set to 35 degrees in accordance with JIS Z 2381, the installation direction was set to face south, and the outdoor exposure was performed for two weeks. The primer for the interstitial material was applied to a covered metal plate after outdoor exposure using a brush, and dried at room temperature for 30 minutes. Then, a gap filler material is coated on the surface of the primer and allowed to dry at room temperature for one week.
The dried interstitial material was peeled off from the coated metal plate by hand, and those who easily peeled off were all evaluated as "○", and (mostly) those who were not peeled off were evaluated as "x".
The interstitial material is a one-pack modified silicone-based interstitial material (SR seal S70; Sunrise MSI Co., Ltd.) or a urethane-based interstitial material (FC700; Nichiha (Nichiha) Co., Ltd.). In addition, the primer is applied because it is considered that the primer is accidentally applied to the surface of the receiving portion serving as the interstitial material during actual construction, and is set to a condition close to the actual construction conditions.

The evaluation results of the coated metal plate 1 to the coated metal plate 16 are shown in Table 2.

[Table 2]

As shown in Table 2, it can be seen that the 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 compared to aminoformic acid. Either the ester-based interstitial material or the silicone-based interstitial material has good non-adhesiveness after exposure.

On the other hand, it can be seen that the coated metal plate 6 to the coated metal plate 16 having a coating layer having at least one of volume resistivity and surface free energy outside the scope of the present application are relative to the urethane-based gap filler material and silicone For any of the interstitial materials, the non-adhesion after exposure was low.

2-1. Preparation of coating material (film 14 to film 18)
Using a kneader, pellets containing 100 parts by mass of an ethylene-vinyl acetate copolymer (the content of vinyl acetate was 8% by mass) and the amount of amidine stearate as the slipping agent were added. After kneading, it was installed between presses, and heated and pressed at a melting temperature of the ethylene-vinyl acetate copolymer at + 30 ° C to obtain films 14 to 18 with a thickness of 50 μm.

[table 3]

2-2. Production and evaluation of coated metal plates (production of coated metal plates 17 to 21)
Except having changed the ethylene-vinyl acetate copolymer film 2 to the film shown in Table 4, it carried out similarly to the coated metal plate 2, and obtained the coated metal plate 17-the coated metal plate 21.

(Volume resistivity, surface free energy)
The volume resistivity and surface free energy of the coating layers of the obtained coated metal plates 17 to 21 were measured by the same method as described above.

(Relative to non-adhesion of interstitial material)
The non-adhesion of the obtained coated metal plates 17 to 21 with respect to the interstitial material was measured by the same method as described above, except that the outdoor exposure time was changed to one month.
Then, the dry interstitial material was peeled off from the coated metal plate by hand, and those who easily peeled off were all evaluated as "◎", while those that were difficult to peel off were mostly peeled off and most of them were not practically evaluated as "○". ".

Table 4 shows the evaluation results of the coated metal plate 17 to the coated metal plate 21.

[Table 4]

As shown in Table 4, it was found that when the slip agent is further included, the non-adhesion to the gap filler can be maintained for a longer time.

This application claims priority based on Japanese Patent Application No. 2018-065011 filed on March 29, 2018 and Japanese Patent Application No. 2019-020827 filed on February 7, 2019. All the contents described in this application specification and drawings are incorporated into this application specification.
[Industrial availability]

According to the present invention, it is possible to provide a coated metal plate that maintains non-adhesion to a gap filler material even after being placed outdoors. Such a coated metal plate can maintain good non-adhesion with respect to the interstitial material, and is suitable as a connector capable of suppressing three-sided adhesion.

10‧‧‧ coated metal sheet

11‧‧‧ metal plate

13‧‧‧ Coating

20‧‧‧ adapter

21‧‧‧ convex section

21A‧‧‧Top

23‧‧‧Substrate Department

30‧‧‧Seam Department

40‧‧‧ Interstitial material

50‧‧‧ Outer packing material

60‧‧‧Anti-adhesive tape

61‧‧‧Release film

62‧‧‧Adhesive layer

FIG. 1 is a cross-sectional view showing a configuration example of a coated metal plate according to this embodiment.

FIG. 2 is a partial perspective view showing an example of a use state of the adapter.

3A and 3B are cross-sectional views of the adapter.

Fig. 4 is a sectional view of an anti-adhesive tape.

Claims (12)

A coated metal plate includes: a metal plate; and a coating layer disposed on the surface of the metal plate and containing a resin, and the volume resistivity of the coating layer measured according to Japanese Industrial Standard C 2139: 2008 is 1.0 × 10 A surface free energy of ¹⁷ Ω · cm or less and a surface free energy calculated based on a contact angle measured in accordance with Japanese Industrial Standard R 3257: 1999 and calculated from the Kaelble-Uy formula is 36.6 mJ / m ² or less. The coated metal plate according to item 1 of the scope of patent application, wherein the resin is an ethylene · vinyl acetate copolymer. The coated metal plate according to item 1 of the patent application scope, wherein the resin is a silicone rubber. The coated metal plate according to item 2 of the scope of patent application, wherein the ethylene · vinyl acetate copolymer is derived from the vinyl acetate-based structural unit with respect to all the structural units constituting the ethylene · vinyl acetate copolymer. The content ratio of N is 5% by mass or more and less than 20% by mass. The coated metal plate according to item 1 of the patent application scope, wherein the coating layer further comprises a slip agent. The coated metal plate according to item 1 of the scope of patent application, wherein the thickness of the coated layer is 3 μm to 120 μm. The coated metal plate according to item 1 of the scope of patent application, wherein the metal plate has a chemical conversion treatment film disposed on a configured surface of the coating layer. An adapter is arranged at a seam portion of an adjacent outer packaging material and has a coated metal plate as described in item 1 of the scope of patent application. The adapter according to item 8 of the scope of patent application, wherein the adapter has a convex portion and a substrate portion connected to a base end portion of the convex portion, The covering layer is disposed on at least a surface of the convex portion for supporting the interstitial material. An anti-adhesive tape has a release film, an adhesive layer, and a coating layer in this order. The coating layer includes a resin, and the volume resistivity of the coating layer measured according to Japanese Industrial Standard C 2139: 2008 is 1.0 × A surface free energy of 10 ¹⁷ Ω · cm or less and a surface free energy calculated based on a contact angle measured in accordance with Japanese Industrial Standard R 3257: 1999 and calculated from a Kaelble-Uy formula is 36.6 mJ / m ² or less. The anti-adhesive tape according to item 10 of the patent application scope, wherein the resin is an ethylene · vinyl acetate copolymer. The anti-adhesive tape according to item 10 of the patent application scope, wherein the resin is a silicone rubber.