JP2009066865A - Decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet which exhibits excellent weatherability, antifouling property and water repellency and at the same time has a lasting cleanup capability for the stains by organic materials such as volatile compounds, bad odor, bacteria and virus without the need of light (ultraviolet light). <P>SOLUTION: The decorative sheet is composed of a base material 1 and a surface-protection layer 4 laminated on it. Any of a thermosetting resin, an ultraviolet-curable resin and an electron beam-curable resin is used for the major component of the surface-protection layer 4. In addition, a phosphate 5 and an oxidation/reduction-assisting compound 6 are mixed in the surface-protection layer 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a decorative sheet having weather resistance and antifouling properties, and further does not require light (ultraviolet rays) and has a purification property against organic contamination such as volatile compounds, malodors, bacteria and viruses. The present invention relates to a decorative sheet for building materials.

  The functionality of decorative sheets is advancing, and in particular, technologies such as antibacterial properties, deodorizing properties, and reduction of volatile organic compounds (VOC) are attracting attention.

  Although research has been conducted on antibacterial and deodorization, volatile organic compounds generated from adhesives used in building materials and furniture have recently been a major problem causing causative syndrome in volatile compounds. This is because.

As one of means for solving these problems, photocatalytic techniques represented by titanium oxide, titanium dioxide, and the like have attracted attention, and a decorative sheet using the photocatalytic technique has also been proposed (see Patent Document 1).
JP 2006-62128 A

  However, since living areas such as kitchens, washrooms, baths, and toilets are difficult to be placed in a sunny place in a general residential building, light (ultraviolet light having a wavelength of 380 nm or less) is often difficult to reach. There are some lamps that are effective when illuminated by incandescent lamps or fluorescent lamps, but in most cases they are used only when necessary, so the time for light irradiation is short.

  Further, since the photocatalyst has a strong decomposing power, there is a problem that the binder resin and the base material are also decomposed and damaged.

  The present invention is intended to solve such problems of the prior art, and is excellent in weather resistance, antifouling properties, water repellency and at the same time does not require light (ultraviolet rays), and is a volatile compound over a long period of time. An object of the present invention is to provide a decorative sheet having a purification function against organic odor such as bad odor and bacteria / viruses.

  The present invention has been made to solve the above-described problems, and the invention according to claim 1 of the present invention includes a thermosetting resin, an ultraviolet curable resin, and an electron beam curable resin on a substrate. A decorative sheet in which a surface protective layer containing any one or more of resins is laminated, wherein the surface protective layer contains a phosphate, and the phosphate has an oxygen catalyst function.

  The invention according to claim 2 of the present invention is characterized in that the phosphate contains one or more metals selected from the group consisting of titanium, cerium, zirconium, germanium, potassium, aluminum and gallium. It is a decorative sheet of description.

  In the invention according to claim 3 of the present invention, the surface protective layer further includes a redox auxiliary compound, and the redox auxiliary compound is platinum, gold, silver, iron, copper, palladium, manganese, vanadium, cobalt, The decorative sheet according to claim 1, comprising at least one of a metal selected from yttrium, lanthanum, and nickel, a metal oxide, and a metal coordination compound.

  The invention according to claim 1 is a decorative sheet in which a surface protective layer is laminated on a base material. By blending a phosphate having an oxygen catalyst function in the surface protective layer, a place with less light It has become possible to provide a decorative sheet having self-cleaning properties against organic pollutants over a long period of time regardless of time.

  Because it can decompose bad odors caused by cigarettes and pets, it exhibits high deodorizing properties. In particular, regarding bacteria, not only the bacteria are killed, but also the dead bodies and the toxins produced by the bacteria can be decomposed, so that high antibacterial properties are exhibited. Furthermore, since negative ions are generated while decomposing volatile organic compounds and an indoor air cleaning effect is exhibited, sick house syndrome can be prevented.

  Further, since the surface protective layer is a thermosetting resin, it is possible to provide a decorative sheet having excellent surface water repellency and elasticity. Further, by making the surface protective layer either an electron beam curable resin or an ultraviolet curable resin, it is possible to provide a decorative sheet that is further excellent in surface strength and surface gloss.

  The invention according to claim 2 is characterized in that the phosphate contains one or more metals selected from the group consisting of titanium, cerium, zirconium, germanium, potassium, aluminum, and gallium, so It has become possible to provide a decorative sheet that can reduce oxidative degradation.

  According to a third aspect of the present invention, the surface protective layer further includes a redox auxiliary compound, and the redox auxiliary compound is platinum, gold, silver, iron, copper, palladium, manganese, vanadium, cobalt, yttrium, By comprising at least one of a metal selected from lanthanum and nickel, a metal oxide, and a metal coordination compound, a stronger purification action is exhibited than when phosphate is blended alone.

  Hereinafter, the decorative sheet of the present invention will be described in detail with reference to FIG.

  FIG. 1 is a sectional view showing an embodiment of a decorative sheet according to the present invention.

  As shown in FIG. 1, the decorative sheet 7 in the present embodiment is formed by sequentially laminating a printing ink layer 2, a transparent thermoplastic resin layer 3, and a surface protective layer 4 on a sheet-like substrate 1, and the surface protective layer In this configuration, phosphate 5 and redox auxiliary compound 6 are distributed in 4.

  As the substrate 1 in the present invention, a known resin can be used, and among them, a thermoplastic resin is preferable. For example, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyethylene terephthalate, polyethylene naphthalate, polymethyl methacrylate, polycarbonate, polystyrene, polyethylene sulfite, polyether sulfite, polyether sulfone, triacetyl cellulose, polyphenylene ether, etc. These can be used, and these copolymers or blends may be used. Polypropylene is particularly preferable in terms of weather resistance and cost. The thickness is preferably in the range of 30 μm to 200 μm, and may be transparent or arbitrarily colored depending on design properties.

  As the printing ink layer 2 in the present invention, various known organic and inorganic pigments can be used, but it is desirable to select a pigment and a binder resin in consideration of weather resistance.

  A known resin can be used as the binder resin for the printing ink, but a urethane or acrylic resin is preferably used. Further, a resin such as a vinyl chloride resin or a vinyl acetate resin may be mixed.

  Although not particularly limited to these, examples of the pigment include carbon black, quinacridone-based, isoindolinone-based, diketopyrrolopyrrole-based, phthalocyanine-based, diazo-based organic pigments, iron oxide, and titanium oxide-based inorganic pigments. It can be used, and can be used alone or in combination.

  As a method of providing the printing ink layer 2 on the substrate 1, it can be produced by any known printing method, and in particular, a gravure printing method is preferable in terms of tone reproducibility and production cost.

  Any known resin can be used as the transparent thermoplastic resin layer 3 in the present invention. Examples of the thermoplastic resin include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyethylene terephthalate, polyethylene naphthalate. Phthalate, polymethyl methacrylate, polycarbonate, polystyrene, polyethylene sulfite, polyether sulfite, polyether sulfone, triacetyl cellulose, polyphenylene ether and the like can be used, and copolymers or blends thereof can also be used. Among them, polypropylene is preferable in terms of weather resistance, and the thickness is preferably in the range of 30 μm to 200 μm.

  As a method for providing the transparent thermoplastic resin layer 3 on the printing ink layer 2, an adhesive such as a two-component curable urethane resin or an adhesion aid may be used, such as an extrusion laminating method, a thermal laminating method, It can be produced by any known laminating method such as a dry laminating method or a wet laminating method, and the laminating method is appropriately selected depending on the types of the substrate 1, the printing ink layer 2, and the transparent thermoplastic resin layer 3. In particular, the extrusion laminating method is suitable in terms of surface embossing.

  The surface protective layer 4 in the present invention is formed using any one of thermosetting resin, ultraviolet curable resin, and electron beam curable resin. The thermosetting resin is not particularly limited, but urethane resin, unsaturated polyester resin, diallyl phthalate resin, phenol resin, epoxy resin, melamine resin, urea resin, silicone A resin or the like is preferably used. These may be used alone or as a mixture. As the ultraviolet curable resin and the electron beam curable resin, an acrylic resin is preferably used. The thickness is preferably in the range of 0.1 μm to 20 μm.

The phosphate in the present invention is not particularly limited as long as it is a known one, but one containing at least one metal selected from the group consisting of titanium, cerium, zirconium, germanium, potassium, aluminum and gallium. preferable. These metals can use their isotopes. Titanium is particularly preferable from the viewpoint of cost. A known method is used as a method for producing a phosphate.
The phosphate may be used in the surface protective layer 4 in the range of 1 × 10 ⁻⁴ wt% to 20 wt%.

The oxidation-reduction auxiliary compound in the present invention is not particularly limited as long as it has the same effect, but platinum, gold, silver, iron, copper, palladium, manganese, vanadium, cobalt, yttrium having a large oxidation-reduction ability. One or more of metals selected from lanthanum and nickel, oxides thereof and coordination compounds thereof are used. Particularly preferred from the viewpoint of cost are iron, its oxide, and its coordination compound.
The redox auxiliary compound is preferably used in the surface protective layer 4 in the range of 1 × 10 ⁻⁴ wt% to 10 wt%.

  By using the decorative sheet of the present invention, it is possible to exert similar effects on various building component parts.

  EXAMPLES The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

<Example 1>
As a base material, 0.5% by weight of a benzophenone ultraviolet absorber and 0.5% by weight of a hindered amine light stabilizer were added and extruded to a polypropylene sheet having a thickness of 70 μm, and a polyester polyol resin as an adhesion assistant was 10 μm. It was applied by a gravure coating method so as to have a thickness of.

  On top of this, a polypropylene resin added with 0.5% by weight of a benzophenone ultraviolet absorber and 0.5% by weight of a hindered amine light stabilizer was provided so as to have a thickness of 90 μm by extrusion lamination.

Furthermore, by providing 10 μm of a urethane-based resin to which 0.5% by weight of titanium phosphate and 0.1% by weight of iron coordination compound (5Fe ₂ O ₃ .9H ₂ O) are added as a surface protective layer, A decorative sheet of the present invention was prepared.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
In Example 1, 0.5% by weight of titanium dioxide was added as a photocatalyst instead of adding a phosphate and a redox auxiliary compound. Otherwise, a decorative sheet was prepared in the same manner as in Example 1.

<Comparative example 2>
In Example 1, a decorative sheet was prepared in the same manner as in Example 1 except that the phosphate and the redox auxiliary compound were not added.

Below, the performance evaluation of an Example and a comparative example was performed.
<Performance evaluation 1>
To each of the decorative sheets of Example 1, Comparative Example 1, and Comparative Example 2, Escherichia coli, Staphylococcus aureus, and Salmonella were dropped as contaminants, and irradiated with a fluorescent lamp at 25 ° C. for the first 2 hours. Thereafter, it was stored in the dark for 22 hours. Thereafter, the number of viable bacteria was counted and compared.

  As a result, although the number of viable bacteria in Comparative Example 1 was smaller than that in Comparative Example 2 in any bacteria, it was not confirmed that the number of viable bacteria was reduced as much as in Example 1.

  The decorative sheet of the present invention does not require light (ultraviolet rays) and has a purifying property against organic contaminants such as volatile compounds, malodors, and bacteria / viruses, and thus is useful as various building materials. .

It is sectional drawing which shows one Example of the decorative sheet which concerns on this invention.

Explanation of symbols

1 .. Base material layer 2 .. Printing ink layer 3. Transparent thermoplastic resin layer 4.. Surface protective layer 5.. Phosphate 6.

Claims (3)

  In a decorative sheet in which a surface protective layer containing any one or more of a thermosetting resin, an ultraviolet curable resin, and an electron beam curable resin is laminated on a substrate, the surface protective layer contains a phosphate, and A decorative sheet, wherein the phosphate has an oxygen catalyst function.   The decorative sheet according to claim 1, wherein the phosphate contains one or more metals selected from the group consisting of titanium, cerium, zirconium, germanium, potassium, aluminum, and gallium.   The surface protective layer further includes a redox auxiliary compound, and the redox auxiliary compound is a metal selected from platinum, gold, silver, iron, copper, palladium, manganese, vanadium, cobalt, yttrium, lanthanum and nickel, The decorative sheet according to claim 1, comprising at least one of a metal oxide and a metal coordination compound.

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