JP6153889B2 - Decorative sheet with high brightness design - Google Patents

Description

The present invention relates to a decorative sheet provided with a high-luminance design. More specifically, the present invention relates to a decorative sheet provided with a design having a high brightness without impairing the whiteness of the colored base film.

Traditionally, furniture such as display racks, storage cabinets, cupboards, desks, etc .; household appliances such as refrigerators, washing machines, air conditioners, mobile phones, personal computers; Used on the surface of a base material made of a wood-based material such as particle board or hardboard; or on the surface of a base material made of a metal-based material such as iron or aluminum; As such a decorative sheet, a sheet provided with a high brightness design using high brightness pigments such as aluminum, brass, mica, and pearls has been proposed (for example, Patent Document 1).

However, when high-luminance pigments such as aluminum, brass, mica, and pearls are applied to light colored substrate films such as white, light gray, and light blue, high luminance can be obtained, but yellowing or blackening can occur. As a result, the whiteness, brightness, or vividness of the colored base film is impaired.

JP-A-8-156215

The problem of the present invention is that even if the colored substrate film is light color such as white, light gray, and light blue, it is yellowed or darkened without impairing the whiteness, brightness, or vividness of the colored substrate film An object of the present invention is to provide a decorative sheet to which a design having a high luminance feeling is given.

As a result of diligent research, the present inventors have found that the decorative sheet having a specific layer structure having a transparent adhesive layer containing a specific amount of glass particles having a specific particle diameter whose surface is coated with a metal oxide having light transmittance, I found that I can achieve the task.

That is, the present invention includes (A) a transparent resin film layer, (B) an adhesive layer containing a high-brightness pigment, and (C) a colored base film layer in order from the surface side. The adhesive layer containing
(B1) 100 parts by mass of a transparent adhesive; and (b2) a surface having an average particle diameter of 10 to 250 μm was coated with one or more selected from the group consisting of titanium oxide, indium oxide, zinc oxide, and tin oxide. 0.01 to 5 parts by mass of glass particles;
The (C) colored resin film layer is a bright color decorative sheet.

A second invention of the present invention is an article using the decorative sheet according to the first invention.

The third invention of the present invention is the use of the decorative sheet according to the first invention for decorative decoration of articles.

The decorative sheet of the present invention is yellowed or darkened and is given a design with a high brightness without impairing the whiteness, brightness, or vividness of the colored base film. Therefore, it can be suitably used for furniture such as display cabinets, storage cabinets, cupboards, desks, etc .; household appliances such as refrigerators, washing machines, air conditioners, mobile phones, personal computers; or decorative cosmetics for building components such as floors, walls, bathrooms, etc. it can.

The decorative sheet of the present invention has (A) a transparent resin film layer, (B) an adhesive layer containing a high-luminance pigment, and (C) a colored base film layer in order from the surface side. By having such a layer structure, the bright brightness of the layer B emerges in the bright color of the innermost layer C, and the presence of the layer A creates a high sense of depth.

The layer A is a layer made of a transparent resin film, and effectively exerts the design effect of the high-brightness pigment in the layer B and the bright color of the layer C, and functions to impart a high depth feeling.

The transparent resin film preferably has a total light transmittance of 80% or more, more preferably 85% or more in order to effectively exhibit the design effect of the bright color in the layer B and the bright color of the layer C. More preferably, it is 90% or more. A higher total light transmittance is preferable. In this specification, the total light transmittance is a value measured according to JIS K 7361-1: 1997.

The thickness of the transparent resin film is preferably 25 μm or more, more preferably 50 μm or more, and further preferably 80 μm or more. The depth of the decorative sheet can be enhanced. The upper limit of the thickness is not particularly from the viewpoint of enhancing the depth of the decorative sheet, but from the viewpoint of being able to produce the decorative sheet of the present invention using a known web device, preferably 1000 μm or less, More preferably, it may be 300 μm or less.

The transparent resin film preferably has a 60 ° gloss of at least the surface of the decorative sheet, preferably 80% or more, more preferably 90% or more, and still more preferably 100% or more. A higher 60 ° gloss is preferred. The bright color of the colored substrate film can be increased. In this specification, 60 ° gloss is a value measured according to JIS-K 7105: 1981.

Examples of such transparent resin films include polyester resins such as aromatic polyesters and aliphatic polyesters; acrylic resins; polyvinyl chloride resins; polycarbonate resins; polyolefin resins such as polyethylene, polypropylene, and polymethylpentene. Cellulosic resin such as cellophane, triacetyl cellulose, diacetyl cellulose, acetyl cellulose butyrate; polystyrene, acrylonitrile / butadiene / styrene copolymer resin (ABS resin), styrene / ethylene / butadiene / styrene copolymer, styrene / ethylene / Styrene resins such as butadiene / styrene copolymers; polyvinylidene chloride resins; fluorine-containing resins such as polyvinylidene fluoride; Can be mentioned transparent resin film such as; call, polyetheretherketone, nylon, polyamide, polyimide, polyurethane, polyether imide, polysulfone, polyether sulfone. These films include unstretched films, uniaxially stretched films, and biaxially stretched films. Moreover, the laminated film which laminated | stacked 1 type (s) or 2 or more types of these films may be sufficient.

Among these, from the viewpoint of design properties, films of polyester resins, acrylic resins, and polyvinyl chloride resins are preferable.

(B) The adhesive layer containing the high-intensity pigment comprises (b1) 100 parts by mass of a transparent adhesive; and (b2) a surface having an average particle diameter of 10 to 250 μm, titanium oxide, indium oxide, zinc oxide, and tin oxide. Glass particles coated with one or more selected from the group consisting of 0.01 to 5 parts by mass.

The component b1 includes a high-intensity pigment and functions to bond the layer A and the layer C together. In addition, the component b1 is transparent in order to effectively exhibit the design effect due to the bright color of the high brightness pigment and the layer C.

In the present specification, the “transparent adhesive” means an adhesive having a visible light transmittance of 30% or more, preferably 50% or more, more preferably 80% or more. Here, the visible light transmittance is the transmittance at a wavelength of 380 to 780 nm of the adhesive of the sample using a spectrophotometer “SolidSpec-3700 (trade name)” manufactured by Shimadzu Corporation and a quartz cell having an optical path length of 10 mm. The spectrum was measured and calculated as the ratio of the integrated area of the transmission spectrum of the sample adhesive to the integrated area of the transmission spectrum assuming that the transmittance in the entire range of wavelengths from 380 to 780 nanometers was 100%. Value.

In this specification, the term “adhesive” is used as a term including an adhesive.

The component b1 is transparent not only when producing decorative sheets, but also when decorating and decorating articles using a decorative sheet, and when decoratively decorated articles are used. Is preferred.

As said component b1, it is not restrict | limited except having sufficient adhesive force and being transparent, Arbitrary adhesives can be used. For example, polyester, polyurethane, polyvinyl chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, epoxy, polychloroprene, poly (meth) acryl, polystyrene, polyamide, cellulose, and Examples of the adhesive include one or a mixture of two or more adhesives such as a styrene-butadiene copolymer system.

Among these, from the viewpoint of adhesive strength and transparency, polyester-based, polyurethane-based, polyvinyl chloride-based, polyacryl-based, polymethacryl-based, and polyvinyl acetate-based adhesives are preferable.

The component b2 functions to impart a high-luminance design to the decorative sheet as a high-luminance pigment and to effectively exhibit the design effect of the light color of the layer C.

The component b2 is a glass particle whose surface is coated with one or more metal oxides selected from the group consisting of titanium oxide, indium oxide, zinc oxide, and tin oxide. The glass and the metal oxide are transparent substances, and the light reflected by the component b2, that is, the light reflected on the surface of the glass particles or the surface of the metal oxide coating layer is small, but the surface of the glass particles. Since a large path difference occurs depending on whether the light is reflected by the metal oxide coating layer or the metal oxide coating layer, even a small amount makes the human eye feel a high luminance feeling. In addition, since a lot of light is transmitted through the component b2, the design effect by the bright color of the colored base film is effectively exhibited. There is no loss of vividness.

Among the metal oxides, titanium oxide is preferable from the viewpoint of design.

The component b2 has an average particle size of 10 to 250 μm. When the average particle size is 10 μm or more, preferably 20 μm or more, more preferably 40 μm or more, both high brightness and a design effect by the bright color of the colored base film can be achieved. Further, when the thickness is 250 μm or less, preferably 200 μm or less, more preferably 120 μm or less, an effect of making the dispersion unevenness of the component b2 inconspicuous can be obtained.

In this specification, the average particle size is the cumulative particle size from the smaller particle in the particle size distribution curve measured using a laser diffraction / scattering particle size analyzer “MT3200II (trade name)” manufactured by Nikkiso Co., Ltd. The particle diameter is 50% by mass.

The compounding amount of the component b2 is 0.01 to 5 parts by mass with respect to 100 parts by mass of the component b1. When the blending amount is 0.01 parts by mass or more, preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, a high luminance feeling can be obtained. Moreover, the effect which makes the dispersion | distribution nonuniformity of component b2 inconspicuous can be acquired by being 9 mass parts or less, Preferably it is 5 mass parts or less, More preferably, it is 1 mass part or less.

As a commercial example of the said component b2, "Metashine (brand name)" of Nippon Sheet Glass Co., Ltd. can be mention | raise | lifted.

The adhesive containing the high-intensity pigment can further contain an optional component other than the component b1 and the component b2 as desired, as long as the object of the present invention is not adversely affected. Examples of the optional component include a photopolymerization initiator, a compound having two or more isocyanate groups in a molecule, an antistatic agent, a surfactant, a leveling agent, a thixotropic agent, an antifouling agent, and a printability improving agent. And additives such as antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments other than component b2, and fillers. The compounding quantity of the said arbitrary component is about 0.01-10 mass parts with respect to 100 mass parts of component b1.

The method in particular of providing an adhesive bond layer is not restrict | limited, A well-known web application | coating method can be used. Specific examples include roll coating, gravure coating, reverse coating, roll brushing, spray coating, air knife coating, and die coating. At this time, any dilution solvent such as 1-methoxy-2-propanol, nbutyl acetate, toluene, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, and acetone can be used as necessary.

The (C) colored resin film layer is a layer made of a colored resin film, and gives a decorative design effect with a bright color to the decorative sheet, and also smoothes the decorative decorative surface by absorbing irregularities of the article as a base film. Or concealing colors and patterns that are unfavorable to the design of the article.

When the colored film is light, the brightness feeling due to the adhesive layer containing the (B) high brightness pigment can be increased. In this specification, “light color” means that the lightness measured using a spectrocolorimeter “CM-600d (trade name)” manufactured by Konica Minolta Co., Ltd. according to JIS Z8721: 1993 is 5 or more and 10 or less. Means the color. Preferably, it means 7 or more and 10 or less colors.

The colored film is not limited except that it is a bright color, and any colored film can be used. For example, polyester resins such as aromatic polyesters and aliphatic polyesters; acrylic resins; polyvinyl chloride resins; polycarbonate resins; polyolefin resins such as polyethylene, polypropylene, and polymethylpentene; cellophane, triacetyl cellulose, diacetyl cellulose Cellulose resins such as acetylcellulose butyrate; polystyrene, styrene such as acrylonitrile / butadiene / styrene copolymer resin (ABS resin), styrene / ethylene / butadiene / styrene copolymer, styrene / ethylene / butadiene / styrene copolymer -Based resins; polyvinylidene chloride resins; fluorine-containing resins such as polyvinylidene fluoride; others, polyvinyl alcohol, ethylene vinyl alcohol, polyether ether ketone It can be mentioned colored film and the like; nylon, polyamide, polyimide, polyurethane, polyether imide, polysulfone, polyether sulfone. These films include unstretched films, uniaxially stretched films, and biaxially stretched films. Moreover, the laminated film which laminated | stacked 1 type (s) or 2 or more types of these films may be sufficient.

Among these, from the viewpoint of secondary processability of the decorative sheet, films of polyester resins, acrylic resins, and polyvinyl chloride resins are preferable.

The thickness of the colored film may be 50 μm or more, preferably 80 μm or more from the viewpoint of absorbing the unevenness of the article as a base film and smoothing the decorative decorative surface. The upper limit of the thickness is not particularly limited from the viewpoint of absorbing unevenness, but is preferably 1000 μm or less, more preferably 300 μm or less, from the viewpoint that the decorative sheet of the present invention can be produced using a known web device. It may be.

The decorative sheet of the present invention may further be provided with a hard coat layer on the surface layer side of the (A) transparent resin film layer as desired. The scratch resistance of the decorative sheet can be increased. The hard coat layer contains, for example, an active energy ray curable resin together with a compound having two or more isocyanate groups (—N═C═O) and / or a photopolymerization initiator in one molecule. Using a resin composition, it can be formed using a known web coating method.

You may give an embossing pattern to the decorative sheet of this invention using well-known apparatuses, such as an embossing roll, as needed. Usually, if the portion that becomes matte by embossing is 80% or less of the whole, preferably 60% or less, a bright color feeling, high brightness feeling, depth feeling, and transparency can be obtained from the other glossy parts, The effects of the present invention can be obtained.

EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these.

Measuring method (b) Luster (luminance):
In a dark place, light from a 40W white fluorescent lamp (300 lux) is perpendicularly incident from a position separated by a distance of 50 cm from the surface of the decorative sheet, forms an angle of 45 ° with the surface of the decorative sheet, and has a distance of 50 cm. The decorative sheet was visually observed from the separated position and evaluated according to the following criteria.
A: The glitter is very high.
○: High brightness.
Δ: Low glitter.
X: There is almost no glitter.

(B) Transparency (design effect by light color of layer C)
In a dark place, the light of a 40 W white fluorescent lamp (300 lux) is irradiated in parallel so that the surface of the decorative sheet and the light beam of the fluorescent lamp are separated by a distance of 50 cm, and the surface of the decorative sheet on the light source side is 45 °. The decorative sheet was visually observed from positions separated by a distance of 50 cm and evaluated according to the following criteria.
A: The bright color of the layer C is not impaired at all.
○: The light color of the layer C is hardly impaired.
Δ: Light color of layer C is slightly damaged.
X: The light color of the layer C is greatly impaired.

(C) In a light and dark place, a 40W white fluorescent lamp (300 lux) is irradiated in parallel so that the surface of the decorative sheet and the light beam of the fluorescent lamp are separated from each other by a distance of 50 cm. The decorative sheet was visually observed from a position at an angle of 45 ° with the surface of the sheet and separated by a distance of 50 cm, and evaluated according to the following criteria.
A: Bright color feeling is very high.
○: Bright color is high.
Δ: Light color is low.
X: There is no light color feeling.

Raw materials used (A) Transparent resin film:
(A-1) A transparent polyvinyl chloride resin film having a thickness of 80 μm, a total light transmittance of 85%, and a 60 ° gloss of 90%.

(B1) Transparent adhesive:
(B1-1) Vinyl chloride / vinyl acetate / acrylic copolymer adhesive “VTP-NT (trade name)” from DIC Graphics, Inc., total light transmittance 92%.

(B2) Glass particles:
(B2-1) Titanium oxide coated glass particles “Metashine 1080RS (trade name)” manufactured by Nippon Sheet Glass Co., Ltd., particle size of 80 μm.
(B2-2) Titanium oxide-coated glass particles having a particle diameter of 20 μm.
(B2-3) Titanium oxide-coated glass particles having a particle diameter of 40 μm.
(B2-4) Titanium oxide-coated glass particles having a particle diameter of 120 μm.
(B2-5) Titanium oxide-coated glass particles having a particle diameter of 200 μm.

(B′2) Comparative component:
(B′2-1) Titanium oxide-coated glass particles having a particle diameter of 5 μm.
(B′2-2) Titanium oxide-coated glass particles having a particle diameter of 300 μm.
(B′2-3) Nippon Sheet Glass Co., Ltd. silver-coated glass particles “Metashine 1080PS (trade name)”, particle size 80 μm.

(C) Colored substrate film:
(C-1) A colored polyvinyl chloride resin film having a thickness of 80 μm and a white color (brightness 9.4).
(C-2) A colored polyvinyl chloride resin film having a thickness of 80 μm and a light gray color (lightness 5.6).

(C ′) Comparative colored base film:
(C′-1) A colored polyvinyl chloride resin film having a thickness of 80 μm and a black color (lightness 2.3).

Example 1
A knife containing 100 parts by mass of the component (b1-1) and 0.5 parts by mass of the component (b2-1) is added to the transparent resin film (A-1) so as to have a dry film thickness of 15 μm. After coating using a coater and drying, the colored base film (C-1) was heat-laminated on the coated surface under the condition of a surface temperature of a laminating roll of 150 ° C. to obtain a decorative sheet. The above (i) to (c) were evaluated. The results are shown in Table 1.

Examples 2-10, Comparative Examples 1-6
It carried out similarly to Example 1 except having changed the raw material to be used and a compounding ratio as shown in any one of Tables 1-3. The results are shown in any one of Tables 1-3.

The decorative sheet of the present invention has good gloss, transparency, and light color. On the other hand, Comparative Example 1 is inferior in glitter because the particle diameter of component b2 is smaller than the specified range. Comparative Example 2 is inferior in transparency and light color because the particle size of component b2 is larger than the specified range. In Comparative Example 3, the amount of component b2 is less than the specified range, so that the glitter is inferior. In Comparative Example 4, the blending amount of the component b2 is larger than the specified range, so that the transparency and light color are inferior. In Comparative Example 5, the metal that coats the glass particles is silver that is not specified, and thus is inferior in transparency and light color. Comparative Example 6 is inferior in light color because the colored substrate film is dark outside the specified range.

It is a conceptual diagram which shows the cross section of an example of the decorative sheet of this invention.

1: Transparent resin film layer 2: Adhesive layer containing high brightness pigment 3: Colored substrate film layer 4: High brightness pigment

Claims (4)

In order from the surface side, (A) a transparent resin film layer, (B) an adhesive layer containing a high-intensity pigment, (C) a colored substrate film layer,
The adhesive layer containing the (B) high brightness pigment is
(B1) 100 parts by mass of a transparent adhesive; and (b2) a surface having an average particle diameter of 20 to 250 μm was coated with one or more selected from the group consisting of titanium oxide, indium oxide, zinc oxide, and tin oxide. 0.01 to 5 parts by mass of glass particles;
The dry thickness of the adhesive layer containing the (B) high brightness pigment is 15 μm:
The said (C) colored resin film layer is a decorative sheet whose brightness measured according to JIS Z8721: 1993 is a light color of 5 or more and 10 or less.
The decorative sheet according to claim 1, wherein the (C) colored resin film layer has a brightness measured according to JIS Z8721: 1993 of 7 or more and 10 or less.
An article using the decorative sheet according to claim 1.
(B1) 100 parts by mass of a transparent adhesive;
(B2) 0.01 to 5 parts by mass of glass particles coated with one or more selected from the group consisting of titanium oxide, indium oxide, zinc oxide, and tin oxide on the surface having an average particle diameter of 10 to 250 μm; and ,
(B) forming an adhesive layer containing a high-brightness pigment using a paint containing a diluting solvent,
In order from the surface side, (A) a transparent resin film layer, (B) an adhesive layer containing a high-brightness pigment, and (C) a colored substrate film layer. The (C) colored resin film layer is JIS Z8721: 1993. A method for producing a decorative sheet, wherein the brightness measured according to the method is a light color of 5 or more and 10 or less.

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