JP6930569B2 - Exterior decorative parts - Google Patents

Description

The present invention relates to a decorative board that satisfies the requirements for obtaining non-combustibility certification and has excellent adhesive strength and weather resistance.

Conventionally, as a decorative board used for an exterior (for example, a pole, a door, a roof, etc. of a parking lot), a decorative board in which a decorative sheet is attached to a metal base material is known. According to Article 2, Item 9 of the Building Standards Act of Japan, the decorative board meets the requirements for obtaining non-combustibility certification in the heat generation test conforming to ISO5660-1, that is, for 20 minutes after the start of heating, the following (i) ) ~ (Iii) requirements:
(i) The total calorific value is 8 MJ / m ² or less.
(ii) There are no cracks or holes that penetrate to the back surface, which is harmful for fire protection.
(iii) It is required that the ^{maximum heat generation rate does not exceed "200 kW / m 2} or more continuously (continuously) for 10 seconds or more".

As a decorative sheet for satisfying the above requirements, Cited Document 1 describes a flame-retardant decorative sheet having self-extinguishing property by adding an organic bromine-based flame retardant to a polyolefin-based resin layer. Further, as another decorative sheet for satisfying the above requirements, Cited Document 2 describes a decorative sheet containing a flame retardant such as aluminum hydroxide in an adhesive layer containing an acrylic pressure-sensitive adhesive base.

However, a decorative sheet containing an organic bromine-based flame retardant (and by extension, a decorative board) is difficult to manufacture, process, and the like, and has a problem that weather resistance is lowered. Further, a decorative board having a decorative sheet containing a flame retardant such as aluminum hydroxide has a problem that the adhesive strength between the decorative sheet and the metal base material is low. On the other hand, it is difficult for a decorative board to which a decorative sheet to which a flame retardant is not added is attached to satisfy the above requirements for obtaining nonflammable certification.

Japanese Unexamined Patent Publication No. 2001-219509 JP-A-2007-229995

An object of the present invention is to provide a decorative board that satisfies the requirements for obtaining non-combustibility certification (requirements (i) to (iii) above) and has excellent adhesive strength and weather resistance.

As a result of diligent research, the present inventor has found that the above object can be achieved when the thickness of the metal base material, the adhesive layer and the decorative sheet and the width of the overlapping portion of the decorative sheet are set within specific ranges. The present invention has been completed.

That is, the present invention relates to the following decorative members.
1. 1. An exterior decorative member having a decorative sheet on the outer periphery of a tubular metal base material only via an adhesive layer composed of one or more of polyester adhesive, acrylic adhesive and urethane adhesive. hand,
(1) The metal base material contains aluminum and has a thickness of 50 mm or less.
(2) The thickness of the adhesive layer is 80 μm or less.
(3) The thickness of the decorative sheet is 40 to 150 μm.
(4) The decorative sheet is provided with a lap press portion, the lap press portion is doubly overlapped, and the width of the lap press portion is 12 mm or less.
(5) Satisfy the requirements for non-combustibility certification in the heat generation test conforming to ISO5660-1.
(6) The adhesive strength measured according to the JIS Z 0237 test method is 20 N / inch or more.
(7) The decorative sheet has a surface protective layer having a thickness of 5 to 20 μm ( solid content) containing a pattern layer, a transparent resin layer, and a curable resin on the base material sheet in order, and the base material sheet. And the transparent resin layer contains polyolefin,
(8) The adhesive layer and the decorative sheet do not contain a flame retardant.
A tubular exterior decorative member.

Hereinafter, the decorative board of the present invention will be described in detail.

Decorative board of the present invention The decorative board of the present invention is a decorative board in which an adhesive layer and a decorative sheet are sequentially laminated on a metal base material.
(1) The thickness of the metal base material is 1.5 to 50 mm.
(2) The thickness of the adhesive layer is 80 μm or less.
(3) The thickness of the decorative sheet is 40 to 150 μm.
(4) The width of the overlapping portion of the decorative sheet is 0 to 12 mm.
It is characterized by that. Since the decorative board of the present invention having the above characteristics has the thickness of each layer and the width of the overlapping portion of the decorative sheet within specific ranges, the requirements for obtaining nonflammable certification even when a flame retardant is not contained, that is, the following Requirements for (i) to (iii):
(i) The total calorific value is 8 MJ / m ² or less.
(ii) There are no cracks or holes that penetrate to the back surface, which is harmful for fire protection.
^{(iii) The maximum heat generation rate does not exceed 200 kW / m 2} continuously (continuously) for 10 seconds or more, and the adhesive strength and weather resistance are excellent.

≪Fever test≫
In the present invention, a test conforming to the ISO5660-1 cone calorimeter method (hereinafter, also simply referred to as a heat generation test) is adopted. This method is a test method for evaluating the burning properties of building materials such as decorative boards, and is used to determine the heat generation of building materials under radiant heating conditions.

Specifically, a test piece (10 x 10 cm) is placed horizontally, ^{radiant heating of 50 kW / m 2} is applied from above by a cone-shaped electric heater, ignited by the ignition of an electric spark, and burned by the amount of heat generated at that time. Judge the sex. The calorific value is measured from the oxygen consumption by combustion gas analysis.

Hereinafter, each configuration of the decorative board of the present invention will be described.

≪Metal base material≫
The decorative board of the present invention has a metal base material having a thickness (thickness) of 1.5 to 50 mm. If the thickness is less than 1.5 mm, the maximum heat generation rate will be generated earlier (the maximum heat generation rate will be higher) in the heat generation test, and as a result, the maximum heat generation rate will be 10 seconds or more in 20 minutes after the start of heating. There is a risk that it will continue to ^{exceed 200 kW / m 2.} On the other hand, the upper limit of 50 mm is the limit of the thickness of the test piece in the exothermic test.

As the material of the metal base material, aluminum, iron, hot-dip galvanized steel plate, tin plate, tin plate steel plate and the like can be used. Of these, a base material containing aluminum is preferable from the viewpoint of corrosion resistance.

The shape of the metal base material may be a flat plate shape or a tubular shape as shown in FIG. 1 described later. When the shape of the metal base material is tubular, a tubular decorative plate can be obtained by laminating an adhesive layer and a decorative sheet on the metal base material.

≪Adhesive layer≫
An adhesive layer (adhesive layer A) is laminated on the front surface of the metal base material.

The thickness of the adhesive layer is 80 μm or less. If it exceeds 80 μm, in the exothermic test, the maximum heat generation rate in 20 minutes after the start of heating may continuously exceed ^{200 kW / m 2 for 10 seconds or more.} The thickness of the adhesive layer is preferably 60 to 80 μm.

Examples of the adhesive used in the adhesive layer include polyester-based adhesives, acrylic-based adhesives, urethane-based adhesives, and the like. The adhesive may be used alone or in combination of two or more.

≪Cosmetic sheet≫
A decorative sheet is laminated on the front surface of the adhesive layer (adhesive layer A).

The thickness of the decorative sheet is 40 to 150 μm. If it exceeds 150 μm, the total calorific value for 20 minutes after the start of heating may exceed ^{8 MJ / m 2 in the exothermic test.} The thickness of the decorative sheet is preferably 60 to 150 μm from the viewpoint of weather resistance and the like.

In the decorative board of the present invention, the width of the overlapping portion of the decorative sheet is 0 to 12 mm. The overlapping portion of the decorative sheet is referred to as 4. As shown above, a portion where the decorative sheets are doubly overlapped (a portion where the decorative sheet is laminated on the decorative sheet) is shown. The width of the overlapping portion of the decorative sheet is 5. As shown in the above, the width of the portion where the decorative sheet is doubly overlapped is shown. The width of 0 to 12 mm means that the overlapping pressing portion does not exist (that is, the width of the overlapping pressing portion of the decorative sheet is 0 mm), or the overlapping pressing portion exists and the width is 12 mm or less. Is shown. If the width of the overlapped portion exceeds 12 mm, the total calorific value for 20 minutes after the start of heating may exceed ^{8 MJ / m 2 in the exothermic test.}

Specific examples in which the width of the overlapping portion of the decorative sheet is 0 mm include (1) a decorative board in which one decorative sheet is bonded to a metal base material, and (2) two or more sheets to a metal base material. Examples thereof include a decorative board to which the decorative sheets of the above are attached. In the decorative board in which one or more decorative sheets are bonded to the metal base material, the decorative sheets do not overlap each other twice.

Specific examples in which the decorative sheet has a layered pressing portion and the width thereof is 12 mm or less are as follows: (1) A decorative board in which two decorative sheets are bonded to a metal base material, and the two sheets are used. A decorative board having a portion where the decorative sheets of the above are double-layered, (2) a decorative board in which the metal base material is tubular and one decorative sheet is bonded as shown in FIG. Examples thereof include a decorative board having a portion where the decorative sheets of the above are double overlapped.

The structure of the decorative sheet of the present invention is not limited, but for example, a base sheet having a pattern layer (solid ink layer / pattern ink layer), an adhesive layer, a transparent resin layer, and a surface protective layer in this order. preferable. Hereinafter, this decorative sheet will be described exemplarily.

Base sheet The base sheet includes 1) thin paper, high-quality paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, inter-paper reinforced paper, and 2) wood fiber, glass fiber, asbestos, polyester fiber, and vinylon. Woven fabric or non-woven fabric made of fibers, rayon fibers, etc. 3) Polyester such as polyethylene and polypropylene; polyester such as polyethylene terephthalate and polybutylene terephthalate; polyacrylic; polyamide; polyurethane; synthetic resin sheet (synthetic resin layer) such as polystyrene , One type or two or more types of laminates can be mentioned. The base sheet preferably contains polyolefin.

When the base sheet is a laminated body and has two or more kinds (two or more layers) of synthetic resin layers, the resin components in each synthetic resin layer may be the same or different.

The thickness of the base sheet is preferably about 20 to 150 μm, more preferably 50 to 100 μm. The base sheet may be colored if necessary. Further, the surface may be subjected to surface treatment such as corona discharge treatment, plasma treatment, ozone treatment and the like.

Pattern pattern layer The pattern pattern layer is composed of a pattern ink layer and / or a solid ink layer. The pattern layer can be formed by a printing method such as gravure printing, offset printing, or silk screen printing. Examples of the pattern of the pattern ink layer include a wood grain pattern, a stone grain pattern, a cloth grain pattern, a leather pattern, a geometric pattern, characters, symbols, line drawings, and various abstract patterns. The solid ink layer is obtained by solid printing of colored ink. The pattern pattern layer is composed of one or both of the pattern ink layer and the solid ink layer.

As the ink used for the pattern layer, as a vehicle, chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacrylic, acrylic urethane resin, polyvinyl acetate, polyvinyl chloride, etc. A vinyl chloride-vinyl acetate copolymer, a cellulose-based resin, a polyamide-based resin, or the like is used by mixing one or more of them, and a pigment, a solvent, various auxiliary agents, and the like are added thereto to form an ink. Among these, one or a mixture of two or more of polyester, polyurethane composed of isocyanate and polyol, polyacrylic, acrylic urethane resin, polyamide resin, etc. is preferable from the viewpoint of environmental problems, adhesion to the surface to be printed, and the like. ..

The thickness of the pattern layer is not particularly limited and can be appropriately set according to the product characteristics, but the layer thickness at the time of coating is about 1 to 15 μm, and the layer thickness after drying is about 0.1 to 10 μm.

Adhesive layer The adhesive layer (adhesive layer B) is provided between the pattern layer and the transparent resin layer. The adhesive layer can be obtained by applying and drying a known dry lamination adhesive such as a two-component curable urethane resin.

The thickness of the adhesive layer after drying is preferably about 0.1 to 30 μm, more preferably about 1 to 20 μm.

Transparent Resin Layer The transparent resin layer is not particularly limited as long as it is a transparent resin layer, and can be preferably formed by, for example, a transparent thermoplastic resin. Specifically, both soft, semi-hard or hard polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, and ethylene-acrylic acid ester. Examples thereof include polymers, ionomers, polyacrylic acid esters, and polymethacryl acid esters. Among the above, polyolefins such as polyethylene and polypropylene are preferable.

The transparent resin layer may be colored. In this case, a colorant may be added to the thermoplastic resin. As the colorant, a pigment or dye used in the pattern layer can be used.

The transparent resin layer contains various agents such as fillers, matting agents, foaming agents, lubricants, antistatic agents, antioxidants, ultraviolet absorbers, light stabilizers, radical scavengers, and soft components (for example, rubber). Additives may be included.

The thickness of the transparent resin layer is preferably about 20 to 150 μm, more preferably about 50 to 100 μm.

Primer layer The primer layer can be provided in order to improve the adhesion between the transparent resin layer and the surface protective layer. The primer layer is a transparent or translucent layer, and can be formed by using the resin exemplified as the vehicle of the pattern layer.

The thickness of the primer layer is preferably about 0.5 to 20 μm, more preferably about 1 to 5 μm.

Surface protective layer The surface protective layer (transparent surface protective layer) is provided to impart surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for a decorative sheet. As the resin forming the surface protective layer, a curable resin such as a thermosetting resin or an ionizing radiation curable resin is preferable. In particular, the ionizing radiation curable resin is preferable from the viewpoint of high surface hardness, productivity and the like.

Examples of the heat-curable resin include unsaturated polyester resin, polyurethane resin (including two-component curable polyurethane), epoxy resin, aminoalkyd resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, and melamine. -Urea cocondensation resin, silicon resin, polysiloxane resin and the like can be mentioned.

A curing agent such as a cross-linking agent and a polymerization initiator, and a polymerization accelerator can be added to the resin. For example, as a curing agent, isocyanate, organic sulfonate, etc. can be added to unsaturated polyester resin, polyurethane resin, etc., organic amine, etc. can be added to epoxy resin, peroxide such as methyl ethyl ketone peroxide, azoisobutylnitrile, etc. A radical initiator can be added to the unsaturated polyester resin.

Examples of the method for forming the surface protective layer with the thermosetting resin include a method in which a solution of the thermosetting resin is applied by a coating method such as a roll coating method or a gravure coating method, and dried and cured. The amount of the solution applied is approximately 5 to 30 μm, preferably about 5 to 20 μm in terms of solid content.

The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a cross-linking polymerization reaction by irradiation with ionizing radiation and changes into a three-dimensional polymer structure. For example, one or more of prepolymers, oligomers and monomers having a polymerizable unsaturated bond or an epoxy group in the molecule that can be crosslinked by irradiation with ionizing radiation can be used. For example, acrylate resins such as urethane acrylates, polyester acrylates and epoxy acrylates; silicon resins such as siloxane; polyester resins; epoxy resins and the like can be mentioned.

Examples of ionizing radiation include visible light, ultraviolet rays (near ultraviolet rays, vacuum ultraviolet rays, etc.), X-rays, electron beams, ionizing rays, etc. Among them, ultraviolet rays or electron beams are preferable.

As the ultraviolet source, a light source of an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used. The wavelength of ultraviolet rays is about 190 to 380 nm.

As the electron beam source, for example, various electron beam accelerators such as Cockcroft-Walt type, Van de Graaff type, resonance transformer type, insulated core transformer type, linear type, dynamitron type, and high frequency type can be used. The energy of the electron beam is preferably about 100 to 1000 keV, more preferably about 100 to 300 keV. The irradiation amount of the electron beam is preferably about 2 to 15 Mad.

The ionizing radiation curable resin is sufficiently cured by irradiating it with an electron beam, but when it is cured by irradiating it with ultraviolet rays, it is preferable to add a photopolymerization initiator (sensitizer).

In the case of a resin system having a radically polymerizable unsaturated group, the photopolymerization initiator is, for example, acetophenone, benzophenone, thioxanthone, benzoin, benzoin methyl ether, Michler benzoyl benzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide. , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. Further, in the case of a resin system having a cationically polymerizable functional group, at least one of, for example, an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, a freeleoxysulfoxonium diallyl iodosyl salt and the like. Can be used.

The amount of the photopolymerization initiator added is not particularly limited, but is generally about 0.1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.

As a method of forming the protective layer with the ionizing radiation curable resin, for example, a solution of the ionizing radiation curable resin may be applied by a coating method such as a gravure coating method or a roll coating method. The amount of the solution applied is approximately 5 to 30 μm, preferably about 5 to 20 μm as a solid content.

In order to further impart scratch resistance and abrasion resistance to the surface protective layer formed of the ionizing radiation curable resin, an inorganic filler may be blended. Examples of the inorganic filler include powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyrobolate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, and boron nitride. Examples include diamond, Kongo sand, and glass fiber.

The amount of the inorganic filler added is about 1 to 80 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.

For laminating each layer, for example, a pattern pattern layer (solid ink layer, pattern ink layer) is formed by printing on one surface of the base sheet in order, and then a two-component curable urethane resin or the like is used for known dry lamination on the pattern layer. This can be done by laminating a transparent resin layer by a dry lamination method, a T-die extrusion method, or the like via an adhesive layer (adhesive layer B) made of an adhesive, and further forming a surface protective layer.

An uneven pattern may be formed by embossing from the transparent resin layer side or the surface protection layer side. The uneven pattern can be formed by heat pressing, hairline processing, or the like. Examples of the uneven pattern include a conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a perforated groove.

The decorative board of the present invention is suitable as a decorative board used for exterior applications such as parking poles, doors, and roofs.

The veneer of the present invention is required to obtain non-combustibility certification (that is, (i) the total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less, and (ii) it is harmful for fire protection for 20 minutes after the start of heating. It is a decorative board that ^{has no cracks or holes penetrating to the back surface and satisfies (iii) the maximum heat generation rate does not exceed 200 kW / m 2} for 10 seconds or more continuously for 20 minutes after the start of heating. , Excellent adhesive strength and weather resistance.

It is a schematic diagram which shows an example of the layer structure of the tubular decorative board (without the overlapping holding part) of a reference example. It is a schematic diagram which shows an example of the layer structure of the tubular decorative board (with a stacking press portion) of this invention. It is a schematic diagram which shows an example of the layer structure of the tubular decorative board (with the overlap pressing portion) of this invention, and an example of the test piece of the decorative board. It is a schematic diagram which shows the test piece of Reference Example 6. It is a schematic diagram which shows the test piece of Reference Example 8.

Reference Examples 1 to 5 and Comparative Examples 1 to 3
≪Making a cosmetic sheet≫
Both sides of a base sheet made of polypropylene resin having a thickness of 60 μm were subjected to corona discharge treatment. Next, a pattern layer having a thickness of 2 μm was formed on the front surface of the base sheet by a gravure printing method using a printing ink made of an acrylic urethane resin. Next, a transparent adhesive layer (thickness 3 μm) is formed by applying an adhesive prepared by adding 11 parts by mass of hexamethylene diisocyanate to 100 parts by mass of acrylic polyol-urethane mixed resin on the pattern layer. Formed. Further, a polypropylene resin was heated, melted and extruded on the adhesive layer by a T-die extruder to form a thermoplastic transparent resin layer (thickness 80 μm). Next, a 2 μm-thick primer layer was formed by applying a resin composition prepared by adding 6 parts by mass of hexamethylene diisocyanate to 100 parts by mass of an acrylic polyol-urethane mixed resin on the transparent resin layer. Next, an electron beam-curable resin composition containing a urethane (meth) acrylate oligomer was applied to the primer layer by a gravure coating method so as to have a thickness of 5 μm, dried, and then subjected to electrons under the conditions of an acceleration voltage of 175 keV and 5 Mrad (50 kGy). A surface protective layer was formed by irradiating with a line. Further, embossing by heat pressure was performed from the surface protective layer side to form an uneven pattern of the wood grain conduit pattern, and the decorative sheet of Example 1 was obtained.
≪Making decorative board≫
A polyester adhesive (trade name "PES-360" manufactured by Toagosei Co., Ltd.) was applied to the back side of the decorative sheet. Next, a decorative sheet was attached to the outer periphery of the tubular aluminum material using the extruded aluminum profile (A6063S-T5) so that the aluminum material and the adhesive were in contact with each other. As a result, a decorative board was obtained. Since the length of the decorative sheet on the long side is equal to the outer circumference of the aluminum material, the decorative board does not have a portion for pressing the decorative sheet.

Reference Examples 6 and 8, Examples 7 and 9 and Comparative Example 4
≪Making a cosmetic sheet≫
A decorative sheet was prepared in the same manner as in Reference Examples 1 to 5 and Comparative Examples 1 to 3.
≪Making decorative board≫
The polyester adhesive was applied to the back surface side of the decorative sheet. Next, a decorative sheet was attached to the outer periphery of the tubular aluminum material using the extruded aluminum profile (A6063S-T5) so that the aluminum material and the adhesive were in contact with each other. As a result, a decorative board was obtained. Since the length of the decorative sheet on the long side is longer than the outer circumference of the aluminum material, the decorative board has a portion for pressing the decorative sheet.

Comparative Example 5
≪Making a cosmetic sheet≫
An organic brominated flame retardant (trade name "Frame Cut 110R" manufactured by Tosoh Corporation) is added to a polypropylene resin having a thickness of 60 μm so that the amount is 60 parts by mass with respect to 100 parts by mass of the resin component. A decorative sheet was produced in the same manner as in Reference Examples 1 to 5 and Comparative Examples 1 to 3 except that the material sheet was used.
≪Making decorative board≫
A decorative board was produced in the same manner as in Reference Examples 1 to 5 and Comparative Examples 1 to 3.

Comparative Example 6
≪Making a cosmetic sheet≫
A decorative sheet was prepared in the same manner as in Reference Examples 1 to 5 and Comparative Examples 1 to 3.
≪Making decorative board≫
Aluminum hydroxide-containing flame retardant (trade name "Martinal" manufactured by Albemar Japan Co., Ltd.) is added to the polyester adhesive so that the amount is 30 parts by mass with respect to 100 parts by mass of the adhesive, and this is adhered. Decorative boards were produced in the same manner as in Reference Examples 1 to 5 and Comparative Examples 1 to 3 except that they were used as agents.

Test Example 1 (Fever test)
The decorative boards obtained in Reference Examples 1 to 6 and 8, Examples 7 and 9 and Comparative Examples 1 to 6 were cut as shown in FIG. 3 to prepare a test piece having a size of 100 mm × 100 mm. The test piece was tested for 20 minutes in accordance with the ISO5660-1 cone calorimeter method. In the exothermic test, a corn calorimeter manufactured by Toyo Seiki Co., Ltd. was used. The evaluation criteria were as follows.
A: Satisfy all of the following requirements (1) to (3);
(1) Total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less,
(2) For 20 minutes after the start of heating, there should be no cracks or holes that penetrate to the back surface, which is harmful for fire protection.
(3) The maximum heat generation rate must not exceed ^{200 kW / m 2 for} 10 seconds or longer for 20 minutes after the start of heating.
B: Does not meet at least one of the above requirements (1) to (3).

Test Example 2 (Adhesive strength)
The adhesive strength of the decorative boards obtained in Reference Examples 1 to 6 and 8, Examples 7 and 9 and Comparative Examples 1 to 6 was measured according to the test method of JIS Z 0237. The evaluation criteria were as follows. If it is A or B, it is actually preferable for exterior use.
A: 30N / inch or more B: 20N / inch or more and less than 30N / inch C: 20N / inch or less

Test Example 3 (weather resistance)
UV lamp (brand name "M04-L21WB / SUV", manufactured by Iwasaki Electric Co., Ltd.), lamp jacket (brand name "WJ50-SUV", manufactured by Iwasaki Electric Co., Ltd.), and luminometer (brand name "UVD-365PD", An ultra-accelerated weather resistance test device (trade name "Eye Super UV Tester SUV-W131", manufactured by Iwasaki Electric Co., Ltd.) equipped with Iwasaki Electric Co., Ltd. was prepared. The black panel temperature of the super-accelerated weathering test apparatus ^{was set to 63 ° C. and the illuminance was set to 60 mW / cm 2} , and the decorative plates obtained in Reference Examples 1 to 6 and 8, Examples 7 and 9 and Comparative Examples 1 to 6 were obtained. On the other hand, 20 hours of irradiation and 4 hours of dew condensation were repeated until 200 hours were reached. The appearance of the decorative board after the test was observed. The evaluation criteria were as follows. If it is A or B, it can actually be used for exterior use.
A: No change in appearance B: There is some whitening, but there is no problem in design C: Whitening is clearly seen Each test result is shown in Table 1 below.

In the table,-indicates "none". In the table, * 1 indicates that in a 100 mm × 100 mm test piece, the center of the position of the overlapping holding portion is 50 mm from the sheet edge. In the table, * 2 indicates that in a 100 mm × 100 mm test piece, the center of the position of the overlapping holding portion is 25 mm from the sheet edge. In the table, * 3 indicates that in a 100 mm × 100 mm test piece, the center of the position of the overlapping holding portion is 10 mm from the sheet edge.

1. 1. Cylindrical metal base material 2. Adhesive 3. Decorative sheet 4. Overlapping part 5. Width of the overlapping part 6. Interval from the edge of the sheet to the center of the overlapping part 7. Cutting point 8. Specimen in the exothermic test 9. Metal substrate

Claims (1)

An exterior decorative member having a decorative sheet on the outer periphery of a tubular metal base material only via an adhesive layer composed of one or more of polyester adhesive, acrylic adhesive and urethane adhesive. hand,
(1) The metal base material contains aluminum and has a thickness of 50 mm or less.
(2) The thickness of the adhesive layer is 80 μm or less.
(3) The thickness of the decorative sheet is 40 to 150 μm.
(4) The decorative sheet is provided with a lap press portion, the lap press portion is doubly overlapped, and the width of the lap press portion is 12 mm or less.
(5) Satisfy the requirements for non-combustibility certification in the heat generation test conforming to ISO5660-1.
(6) The adhesive strength measured according to the JIS Z 0237 test method is 20 N / inch or more.
(7) The decorative sheet has a surface protective layer having a thickness of 5 to 20 μm ( solid content) containing a pattern layer, a transparent resin layer, and a curable resin on the base material sheet in order, and the base material sheet. And the transparent resin layer contains polyolefin,
(8) The adhesive layer and the decorative sheet do not contain a flame retardant.
A tubular exterior decorative member.

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