JPH05104695A - Decorative sheet - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a decorative sheet that is excellent in the expression of depth and three-dimensional effect and has high sharpness. [Structure] The lower printing ink layer 1 is formed on the opaque sheet 11.
2, transparent vinyl chloride resin layer 13, upper printing ink layer 14,
The surface protection layer 15 having transparency is sequentially laminated to form the decorative sheet 1. Incident light is reflected and absorbed in multiple stages, which makes shadows, colors, and patterns appear and disappear, and these effects combine to provide excellent depth and stereoscopic effect. Further, by setting the surface protective layer 15 to have a haze degree of 1 to 8% and a light transmittance of 70% or more in a wavelength range of 4000 nm to 7000 nm, high image clarity can be expressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet having a depth and a three-dimensional effect.

[0002]

2. Description of the Related Art Conventionally, various decorative sheets with depth are known, but those having a transparent layer provided between a printed pattern and a substrate to express a feeling of depth are easy to manufacture. Is often used for.

[0003]

However, the conventional decorative sheet has a problem that the depth and the three-dimensional effect are not sufficiently expressed because only one printed pattern layer is provided.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a decorative sheet excellent in the expression of depth and stereoscopic effect.

[0005]

In order to achieve the above object, the decorative sheet of the present invention comprises a printing ink layer (hereinafter referred to as a lower printing ink layer) on an opaque sheet, and a transparent vinyl chloride resin layer, It is characterized in that a printing ink layer (hereinafter referred to as an upper printing ink layer) and a surface protective layer having transparency are sequentially laminated.

More preferably, the transparent surface protective layer has a haze of 1 to 8% and a light transmittance of 70% or more in the wavelength range of 400 nm to 700 nm. Becomes

In the above structure, the opaque sheet is a polyvinyl chloride film, a polyvinylidene chloride film, a polyethylene film, a polypropylene film, a polyvinyl alcohol film, a polyethylene terephthalate film, a polycarbonate film, a nylon film, a polystyrene film, an ethylene vinyl acetate copolymer. A film, an ethylene vinyl alcohol copolymer film, a plastic film such as an ionomer can be used.

As a preferable attribute of the opaque sheet, first, it is preferable that the color has a high lightness, or,
Those whose surface exhibits metallic luster or pearl luster are also preferable. It is considered that the reason why the one having high color lightness is preferable is that the upper printing ink layer of the printing ink layers described later casts a shadow on the surface of the opaque sheet through the transparent vinyl chloride resin layer, and the shadow is easily visible. .. It is needless to say that white is preferable as the opaque sheet, but if it is a light color even if it is not white, there is no problem in use. Therefore, when the opaque sheet is manufactured, it is colored with a colorant mainly containing a white pigment, or It is desirable to apply paints containing those colorants. Also, when the surface has metallic luster or pearl luster, when the upper printing ink layer casts a shadow on the surface of the opaque sheet through the transparent vinyl chloride resin layer as described above, the shadow and the part without the shadow are clarified. Therefore, it is considered that the visibility of the shadow is improved. In order to produce a metallic luster or pearl luster on the surface of the opaque sheet for such a purpose, metal powder or pearl powder (usually mica is used as a substitute) is produced or kneaded when the opaque sheet 1 is manufactured. To do. Further, a layer exhibiting metallic luster or pearl luster may be provided on the back surface of the transparent layer.

Next, as the ink used for forming the upper and lower printing ink layers, a pigment, a coloring agent such as a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, and An appropriate mixture of curing agents and the like is used. Here, the vehicle is appropriately selected from a thermoplastic resin, a thermosetting resin, an ionizing radiation curable resin, and the like according to the application, required physical properties, printability, and the like.

Examples of the thermoplastic resin include, for example, cellulose derivatives such as ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxyethyl cellulose and cellulose acetate propionate, styrene resins such as polystyrene and poly α-methylstyrene, or styrene copolymers, Acrylic resins such as poly (methyl methacrylate), poly (ethyl methacrylate), poly (ethyl acrylate) and poly (butyl acrylate), polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, vinyl polymers such as polyvinyl butyral, etc. Be done.

As the thermosetting resin, phenol resin,
Urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine / urea co-condensation resin, silicon resin, polysiloxane resin, etc. Depending on the conditions, a crosslinking agent, a curing agent such as a polymerization initiator, a polymerization accelerator, a solvent, a viscosity modifier, and an extender pigment are added. As the curing agent, isocyanate is usually unsaturated polyester resin, polyurethane resin, amine is epoxy resin, peroxide such as methyl ethyl ketone peroxide, radical initiator such as azobisisobutyronitrile is unsaturated polyester resin. Often used in.

Examples of the ionizing radiation curable resin include acrylates such as urethane acrylate, polyester acrylate and epoxy acrylate, silicon resins such as siloxane, polyester resins and epoxy resins.

The upper and lower printing ink layers are usually formed by printing the upper printing ink layer on the back surface of a transparent surface protective layer and the lower printing ink layer on the surface of an opaque sheet. It may be formed by other methods. The upper and lower printing ink layers may be formed by using the above-described ink and using a known method such as a gravure printing method or a screen printing method. In addition to printing an ink, printing a pattern includes applying a pattern using vapor deposition of metal. For the formation of a pattern using a metal vapor deposition film, for example, a water-soluble ink layer having a desired pattern is provided on a transparent resin layer, a metal is vapor-deposited on the layer, and then washed with water to form the water-soluble ink and the vapor deposition layer thereon. It can be carried out by removing it, and such a method is also included in the printing of the pattern in the present invention.

Here, as a preferable feature of the upper and lower printing ink layers, since the design of the present decorative sheet is composed of a combination of the design of the upper printing ink layer and the design of the lower printing ink layer, the respective designs overlap each other. It is preferable to use a printing ink layer that improves the design when one pattern is formed.

As the ink pigment, carbon black,
Known pigments such as cyanine blue, pearl pigments such as titanium dioxide coated mica, etc. are used, and as patterns and patterns, natural products such as wood grain patterns and stone patterns, and abstract patterns such as polka dots and striped patterns can be arbitrarily used. It can be set, and instead of the printing ink layer, a metal thin film layer of aluminum, chromium or the like provided in a partial pattern may be provided.

Next, as the surface protective layer having transparency, there may be mentioned resin, polyester resin, acrylic resin, polyester / acrylic copolymer, etc. in addition to building chloride. Further, if necessary, various known hard coat layers may be provided. For example, a hard coat paint such as electron beam or ultraviolet ray curable polyester acrylate or urethane acrylate is used.

The role of the transparent surface protective layer is as follows.
The purpose is to protect the upper printing ink layer and the transparent vinyl chloride resin layer and impart surface strength and abrasion resistance to the decorative sheet.

The transparent surface protective layer has a haze of 1 to 8%, more preferably 3 to 6%, and a light transmittance of 70% or more in the wavelength range of 400 nm to 700 nm. By the presence of such a substance, the colors and patterns of the opaque sheet and the upper and lower printing ink layers can be clearly highlighted, and the three-dimensional effect can be exhibited.

Here, the haze degree indicates the ratio of diffused light to transmitted light.
Shows the degree of haze when seeing an object through the sample,
The higher the haze, the more blurred it looks. Total light transmittance is T
Let t be the diffuse transmittance and Td be the haze (cloudiness) H
Is a value obtained by H = (Td / Tt) × 100 (%). If the haze degree is too small, the surface of the opaque sheet or the transparent vinyl chloride resin layer may be slightly too sharp and may be slightly scratched. But it is very noticeable. On the other hand, when the haze degree is larger than a predetermined value, the internal colors and patterns are scattered and the vividness becomes insufficient. Next, when the light transmittance is less than 70%, high image clarity cannot be obtained, while the upper limit is not particularly limited.

As described above, the decorative sheet 1 of the present invention has an opaque sheet 11, a lower printing ink layer 12, a transparent vinyl chloride resin layer 13, an upper printing ink layer 14 and transparency as shown in FIG. It is composed of the surface protection layer 15. The light incident on the decorative sheet 1 is on the surface of each layer, particularly the opaque sheet 11, the lower printing ink layer 1
2. The light reflected by the surface of the upper printing ink layer 14, but the light reflected by the surface of the upper printing ink layer 14 causes a shadow of the pattern of the upper printing ink layer 14 on the surface of the opaque sheet 11 or the lower printing ink layer 12. Occurs. Also, the lower printing ink layer 1
2 and the light reflected by the opaque sheet 11 is reflected or absorbed by the pattern of the upper printing ink layer 14 depending on the viewing angle.
You can see or not see the colors and patterns.
The effect of such multi-level reflection and absorption and the shadows, the colors and patterns that appear and disappear due to the reflection, and the effects thereof are combined to obtain the decorative sheet 1 excellent in depth and stereoscopic effect.

Here, the haze degree of the transparent surface protective layer 15 is in the range of 1 to 8%, more preferably 3 to 6%.
And a light transmittance of 400 nm to 700 n
By setting the content to be 70% or more in the range of m, the decorative sheet 1 capable of expressing even higher image clarity can be obtained.

In the above decorative sheet 1 of the present invention, the opaque sheet 1, the lower printing ink layer 12, the transparent vinyl chloride layer 13, the upper printing ink layer 14 and the transparent surface protective layer 15 are laminated together. As a bonding method, a belt pressing method, a dry lamination method, a thermocompression bonding method or the like is appropriately adopted.

Since the depth and three-dimensional effect of the decorative sheet of the present invention can be obtained by the decorative sheet alone, it can be attached to a metal plate of iron, aluminum, copper or the like, or a decorative plate substrate, for example, various types. It is affixed to plastic boards, wood, plywood, particle boards such as particle boards, gypsum boards such as gypsum boards and gypsum slag boards, pulp cement boards, asbestos cement boards, fiber cement boards such as wood chip cement boards, GRC, concrete, etc. However, the depth and the three-dimensional effect are not impaired.

[0024]

EXAMPLES The following examples serve to explain the present invention more specifically. The invention is not limited in scope by these examples.

Example 1 FIG. 2 shows an example of a decorative sheet according to the present invention. The process of making this decorative sheet will be described below.

First, an opaque colored polyvinyl chloride film 21 having a thickness of 0.1 mm ("B-20 manufactured by Bando Kagaku Co., Ltd."
(00 type "), a printing ink layer 22 is formed on the surface of the gravure ink (" Chemical X type "manufactured by Showa Ink Kogyo Co., Ltd.), and an unplasticized transparent polyvinyl chloride film 25 (band Chemical company "B-200
0) ") with a gravure ink (Showa Ink Mfg. Co., Ltd." Chemical X type ") to form a printing ink layer 24,
The surface opposite to the printing ink layer 24 was coated with a UV coating layer to form a transparent protective layer 26.

With the printing ink layers 22 and 24 facing each other, a polyvinyl chloride film 23 having a thickness of 0.4 mm is provided between the colored polyvinyl chloride film 21 and the unplasticized transparent polyvinyl chloride film 25. When sandwiched and laminated in that state by a belt pressing method to prepare a decorative sheet, a decorative sheet having a depth and a three-dimensional effect was obtained.

(Embodiment 2) FIG. 3 shows an embodiment of a decorative sheet according to the present invention, showing a decorative sheet laminated on a steel plate. The process of making this decorative steel sheet will be described below.

First, a 25 μm-thick polyester film 37 (“S-30” manufactured by Toray Industries, Inc.) is coated with a UV coating layer to form a transparent protective layer 38 having a haze of 3% and a light transmittance of 90%. Then, back surface printing was performed on the polyester film surface side with a gravure ink (“Chemical X type” manufactured by Showa Ink Industry Co., Ltd.) to form a printing ink layer 36. Then, a transparent vinyl chloride film 34 having a thickness of 0.1 mm, which is a heat-sealing layer 34, is placed on the printing ink layer 36 side through a urethane two-component adhesive 35 (manufactured by Dainichiseika Co., Ltd.). Manufactured by "B-2000 type") was dry laminated.

On the other hand, an opaque colored polyvinyl chloride film 31 having a thickness of 0.1 mm ("B-20" manufactured by Bando Kagaku Co., Ltd.)
Printing ink layer 32 was prepared by using gravure ink (“X type” manufactured by Showa Ink Kogyo Co., Ltd.) for the “00 type”).

In the laminated body of the transparent protective layer 38, the printing ink layer 36 and the heat-sealing layer 34, the heat-sealing layer 34 side and the printing ink layer 3 of the opaque colored polyvinyl chloride film 31.
0.4mm thick transparent vinyl chloride film 3 between the two sides
3 was sandwiched and laminated by a belt pressing method to prepare a decorative sheet.

Then, this decorative sheet is made to have a thickness of 0.6 mm.
When a decorative steel plate was prepared by laminating the steel plate 39 to the steel plate 39 with an adhesive 40 and used as a surface material of a refrigerator, it was possible to obtain depth and a three-dimensional effect.

[0033]

As described above, the decorative sheet of the present invention has a structure in which the thick transparent vinyl chloride resin layer is sandwiched between the opaque sheet and the printing ink layer is provided above and below the opaque sheet. Light is reflected and absorbed in multiple stages, which causes shadows, colors, and patterns to be seen and hidden, and these effects are combined to provide excellent depth and three-dimensional effect.

The transparent surface protective layer has a haze of 1 to 8% and a light transmittance of 400 nm to 400 nm.
By setting the content to be 70% or more in the range of 700 nm, it is possible to express even higher image clarity.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining a decorative sheet of the present invention.

FIG. 2 is a cross-sectional view showing a decorative sheet according to the present invention.

FIG. 3 is a cross-sectional view showing a state in which a decorative sheet according to the present invention is attached to a steel plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative sheet 11 Opaque sheet 12 Printing ink layer (bottom) 13 Transparent vinyl chloride resin layer 14 Printing ink layer (top) 15 Surface protective layer

Claims (2)

[Claims] 1. A decorative sheet comprising a opaque sheet, a printing ink layer, a transparent vinyl chloride resin layer, a printing ink layer, and a transparent surface protective layer, which are laminated in this order. 2. The surface protective layer having transparency has a haze of 1 to 8% and a light transmittance of 400 nm.
70% or more in the range of nm to 700 nm, The decorative sheet according to claim 1.