JPH0789000A - Decorative sheet having uneven pattern on the inside - Google Patents

Abstract

PURPOSE:To obtain a decorative sheet which is superior in surface resistance and rich in change in a surface form, by a method wherein an uneven pattern to be performed at the time of lamination of a transparent thermoplastic resin layer having a specific thickness on the surface of a patterned layer of a colored thermoplastic resin sheet is comprised of transparent resin layer arriving at the surface of colored thermoplastic resin and a transparent top layer. CONSTITUTION:Solid printing is performed to an opaque colored vinyl chloride sheet 5 by ink containing a glossy pigment and a glossy layer 4 is provided on the solid printing by gravure printing by making use of a pattern printing layer 3 of the grain of wood. Simultaneously with performance of respective hot lamination of three kinds of films having a thickness of not exceeding 60mum as a transparent thermoplastic resin layer 2 embossment is performed and uneven patterns 6a, 6b, 6c are formed. Then an ultraviolet-curing application liquid is applied to an uneven pattern so as to fill the liquid into the uneven pattern and the transparent top layer 1 which is solidified by applying ultraviolet rays to the top layer 1 is provided. Hereby, a decorative sheet A having an uneven pattern on the inside is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material having an uneven pattern, and more particularly to a decorative sheet having an uneven pattern image formed in a surface decorative layer of the decorative material.

[0002]

2. Description of the Related Art A conventional decorative sheet for improving its decorativeness by providing an uneven pattern for realizing a high-level surface design feeling having a "shining feeling" close to that of a real tree is simply a colored opaque substrate. A luster layer and a pattern layer were printed on one surface of the material sheet, embossed from the printed surface, and then coating for the purpose of protecting the uneven pattern was performed. In order to protect the pattern print layer that realizes a high-level surface design feeling with a "shining feeling" close to that of a real tree, a bright solid print layer and a pattern print layer are provided on the back surface of the transparent or translucent sheet. The invention provided is also disclosed. Further, a glittering layer on the surface, and a pattern printing surface of the colored thermoplastic resin sheet provided with a pattern printing layer,
There is also disclosed an invention in which an uneven pattern, a gloss adjusting layer, and a transparent thermoplastic resin film surface on which a pattern is provided in this order are laminated via an adhesive layer.

[0003]

A conventional decorative sheet having a concavo-convex pattern on its surface and a protective layer formed by a coating layer is swelled by the solvent of the coating solution to form a smooth shape. There is a problem that the design feeling cannot be exhibited, and the protective layer is relatively thin, so that the abrasion resistance for protecting the pattern is poor, the aesthetic appearance of the surface is impaired, and the pattern is damaged by abrasion or scratches. . Those provided with a pattern print on the back surface of the transparent sheet are inferior in hiding power as compared to those printed on the colored thermoplastic resin sheet, and the color of the underlying plywood to be applied affects the color of the decorative sheet, There was a problem that the color of the product was not constant when the decorative sheet was viewed from the surface. The surface of a colored thermoplastic resin sheet provided with a glitter layer and a pattern printing layer on the surface is laminated with a transparent thermoplastic resin layer provided with an uneven pattern and a gloss adjusting layer in this order on an image surface. To attach a transparent sheet,
Since air bubbles mixed in the adhesive interface and the sheet due to the solvent of the adhesive may swell, the so-called "shining feeling" which is a glossy feeling realized from the inner surface is not sufficiently expressed.

[0004]

To achieve the above object, the decorative sheet of the present invention has a pattern of a colored thermoplastic resin sheet having a glitter layer and a pattern printing layer on the surface thereof as shown in FIG. The concavo-convex pattern layer formed when laminating the layer surface and the transparent thermoplastic resin layer having a thickness of 60 μm or less comprises the transparent thermoplastic resin layer reaching the surface of the colored thermoplastic resin sheet and the transparent top layer. Further, the decorative sheet with internal embossing is characterized in that the concavo-convex pattern is composed of parallel parallel lines. Furthermore, the transparent top layer has a concave-convex pattern or a mirror surface pattern different from the concave-convex pattern formed on the transparent thermoplastic resin layer.

[0005]

The decorative sheet with internal embossing according to the present invention, as shown in FIG. 1, has a glitter layer, a pattern printing layer, a transparent thermoplastic resin layer to be embossed, and a coating on one surface of a colored thermoplastic resin sheet. The obtained transparent top layer is formed in this order. Since the uneven pattern provided on the transparent thermoplastic resin layer is deeply 15 μm or more, the concave portion is provided so as to reach the pattern layer, the glitter layer, and further the colored thermoplastic resin layer. In addition, since the uneven surface is covered with a transparent top layer containing a matting agent, the glitter layer provided in the decorative layer of the decorative sheet looks like it has an uneven pattern, so it can be realized from the inner surface of a natural material. There is a so-called "shining feeling" which is a glossy feeling. Furthermore, when the transparent top layer surface is semi-cured, an uneven pattern or a mirror surface treatment does not damage the internal uneven pattern, and a state different from the uneven pattern of the transparent thermoplastic resin layer surface can be formed. Therefore, by providing a three-dimensional effect having a different surface condition or a mirror surface, a transparent feeling is obtained and the "shining feeling" is not impaired. The pattern layer is excellent in abrasion resistance due to the transparent top layer and the transparent thermoplastic resin layer on the surface, and the effect of hiding power of the colored opaque thermoplastic resin sheet is sufficiently exerted.

The colored thermoplastic resin sheet used in the present invention is obtained from a thermoplastic resin in which a well-known and durable pigment is kneaded. Thermoplastic resins include polyethylene, polypropylene, ethylene-acrylic acid copolymer,
Polyethylene resin such as ethylene / ethyl acrylate copolymer, saponified product of polyvinyl chloride, ethylene / vinyl acetate copolymer, polyethylene terephthalate, polybutylene terephthalate, acrylic resin such as polymethyl methacrylate, polymethyl acrylate, styrene , ABS
Alternatively, a general-purpose thermoplastic resin such as polycarbonate can be used, but a vinyl chloride resin is preferable because it is suitable for post-processing such as embossing and laminating. The film forming method is determined by the material used, but may be a known method such as a normal calender method, extrusion molding method, casting method, or the like. The thickness depends on the physical properties of the material used, but is 0.
It is about 06 to 0.3 mm.

The vehicle of the glittering resin layer is vinyl chloride.
It is prepared by adding a glittering fine powder using a known material such as a vinyl acetate copolymer, an acrylic acid ester or a polyester type. These fine powders include pearl luster such as titanium dioxide-coated mica powder and fish scale foil, pearl pigments having interference luster, metal powder such as copper powder, aluminum powder and bronze powder, and metal flakes. Among these, those containing mica powder are preferable from the viewpoint of post-processing and chemical durability such as acid resistance and alkali resistance depending on the application. In particular, when a compound containing chlorine such as a vinyl chloride derivative is used as a constituent material of a sheet or the like, the metallic powder may deteriorate its glitter due to a chemical change. In such a case, the titanium dioxide-coated mica powder is a good chemically stable material. In addition, these glittering fine powders,
Poor affinity for vehicle and may separate and precipitate in coating solution. To improve this, if necessary, a surfactant such as metal soap is added, and the fine powder of the coating solution becomes stable without separation. The coating solution thus formed is provided on one surface of the opaque thermoplastic resin sheet by a known coating method, and a coating method using a gravure plate is preferable in order to make the coating amount uniform or stable.

The pattern layer is a gravure printing, silk printing or flexographic printing method using an ink prepared by adding a durable inorganic or organic pigment to a vinyl chloride / vinyl acetate copolymer, acrylic ester or polyester vehicle. Etc. Further, the printing machine is preferably rotary printing that is performed by winding suitable for a post-process such as embossing and laminating.

The transparent thermoplastic resin layer is provided with a thickness of 60 μm or less so that the concavo-convex pattern provided on the surface thereof can reach the pattern printing layer, the glittering resin layer and the colored thermoplastic resin sheet. Materials that can be used are polyethylene, polypropylene, ethylene-acrylic acid copolymer, ethylene
Polyester resin such as ethyl acrylate copolymer, polyvinyl chloride, ethylene / vinyl acetate copolymer saponification product, polyethylene terephthalate, polybutylene terephthalate, acrylic resin such as polymethyl methacrylate, polymethyl acrylate, styrene, ABS or Polycarbonate or the like can be used, and a saponified product of an ethylene / vinyl acetate copolymer or a vinyl chloride sheet is preferable. The method of laminating these sheets and the printed colored thermoplastic resin layer is to heat-laminate a film or sheet formed by a usual method and simultaneously emboss it. If necessary, thermal lamination can be performed after applying the adhesive layer on the pattern layer surface. The transparent thermoplastic resin may be formed on the surface of the pattern layer by melt extrusion coating with or without a primer layer. This method is a particularly effective method when the applied resin is a polyolefin type.

The embossing plate applied to the transparent thermoplastic resin layer is
It is important for expressing "feeling of light". That is, generally, the depth is 50 to 5 μm, and the pitch of the convex portions is 1
The embossed plate having a size of about 50 to 50 μm is preferable because it can represent a natural uneven state in order to form a simple uneven pattern. However, when the pitch is 150 μm or more and the depth is 40 μm or more, the uneven pattern is visible on the upper surface of the decorative layer, and the “shine feeling” is impaired. Therefore, a plate having a depth of 30 μm or more is required in order to reach the pattern layer through the transparent resin layer having a thickness of 60 μm, which is the object of the present invention, and to express a “shining feeling”. .

The uneven pattern provided on the transparent thermoplastic resin layer is
As the parallel groove shown in FIG. 4, a curve group in which a large number of wavy curves such as sine waves are arranged in parallel is used. As the wavy curve, a function curve such as an elliptic function, a Bessel function, a cycloid, a waveform of an audio signal measured by an oscilloscope, or the like can be selected and used in addition to a sine wave.

The transparent top layer formed by coating on the surface is silica fine powder which is an inorganic filler, aluminum hydroxide, magnesium sulfate, polycarbonate which is an organic filler,
5 to 5 gloss modifiers such as methylmethacrylate in the binder
It is formed from 30 parts of the coating liquid kneaded. The binder is appropriately selected from lacquer type nitrocellulose, cellulose acetate butyrate and other fibrin derivatives, vinyl chloride / vinyl acetate copolymers, reactive urethane resins, acrylic resins, epoxy resins, etc. Although it is composed as a main component, an ionizing radiation curable resin is preferable. In the case of a lacquer type resin, a heat curable resin, or a two-component curable resin, the transparent thermoplastic resin layer is formed by the heat contained in the coating solution, the heat generated when the binder is cured, and the heat required for curing. The concavo-convex pattern formed on the may be deformed and damaged. Also, from the viewpoints of abrasion resistance, chemical resistance, stain resistance, surface hardness, etc., ionizing radiation curable resins such as urethane acrylate, polyester acrylate, acrylates such as epoxy acrylate, silicon resins such as siloxane, and polyester. , Epoxy resin and the like are preferable.

When an ultraviolet curable resin is selected from the ionizing radiation curable resins, a photopolymerizable oligomer, a reactive diluent, a modifier, a photopolymerization initiator, and / or a photopolymerization are used as the components. It contains a promoter. Further, in order to give flexibility to the coating film, a thermoplastic resin,
A plasticizer, a thermal polymerization inhibitor, etc. may be added. As the photopolymerizable oligomer, polyester, polyether type ester acrylate, urethane acrylate, epoxy acrylate, diene type, triazine type or vinyl polymer type acrylic oligomer is used. When the substrate sheet is a vinyl chloride sheet, urethane acrylate is preferable in consideration of the adhesiveness of the resin.

The reactive diluent is used for adjusting the viscosity, and a monomer or a low viscosity oligomer is used. Further, in order to adjust the viscosity, a composition may be constituted by adding a solvent such as a high boiling point ester or ketone.

As the photopolymerization initiator, one that radicalizes the oligomer by light energy is adopted. For example, acetophenones, benzoyl alkyl ethers, benzophenones, Michler benzoyl benzoates, α-amyloxime esters, thioxanthones, carbonyl compounds such as benzyl, azo compounds, and organic peroxides can be used. Further, an amine compound, mercaptan, or the like may be added to increase the photopolymerization rate. Further, a photosensitizer such as n-butylamine or triethylamine may be mixed. In order to suppress photopolymerization, hydroquinone, benzothiazole, diethylhydroxyamine, tertiary butylpyrocatechol, sulfoxide and a metal chelating agent are included.

The matting agent used in the top coat layer of the present invention is preferably one which does not give an opaque feeling to the binder.
In that sense, it has a refractive index close to that of the binder, and when dispersing the matting agent, the affinity between the binder and the matting agent is good, and the air contained in the powder,
It is preferable that volatile components such as water are completely removed, and porous substances may not be completely degassed from that point as well, and may have an opaque feeling. Known inorganic extender pigments and organic resin beads can be appropriately selected as usual matting agents, but preferable ones are organic materials that have a refractive index close to that of the binder and can be easily dispersed with the binder and are easily deaerated. belongs to. The refractive index of the ultraviolet curable synthetic resin is generally 1.40 to 1.60. Therefore, if a matting agent having a refractive index close to that is selected, the matting property can be provided without impairing the transparency.

Further, for the purpose of preventing contamination due to dust adhesion on the top coat layer surface of the present invention due to static electricity,
A surfactant may be included as an antistatic agent.
The surfactants used are nonionic surfactants such as glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene alkylphenyl ethers, and ionic surfactants such as alkyl sulfonates, alkylbenzene sulfonates, and alkylnaphthalene sulfonates. There are acid salts, alkyl sulfates, and polyethylene alkyl phosphates. Further, a lubricant such as a fluororesin, a wax, a silicone resin or a release agent may be added for the purpose of giving the top coat layer surface abrasion resistance.

[0018]

EXAMPLE An example will be described with reference to FIG. "Example 1" An ink (made by GR X Pearl Showa Ink Mfg. Co., Ltd.) containing a bright pigment in an opaque colored vinyl chloride sheet 5 (GR Riken Vinyl Co., Ltd.) having a thickness of 0.12 mm. Solid printing was performed to provide a glittering layer 4, and a pattern printing layer 3 of wood grain (Chemical X Pearl, Showa Ink Industry Co., Ltd.) was provided thereon by gravure rotary printing. On the printing surface of the printing sheet, the following three types of films were respectively heat-laminated as the transparent thermoplastic resin layer 2 and simultaneously embossed to form the concavo-convex patterns 6a, 6b and 6c. "Transparent thermoplastic resin layer" Saponified ethylene / vinyl acetate copolymer EVAL HF 12μm (Kuraray Co., Ltd.) Transparent vinyl chloride sheet (GR Riken Vinyl Industry Co., Ltd.) 60μm Transparent vinyl chloride sheet (GR Riken Vinyl Industry) 80 μm “embossed plate” depth 30 μm pitch between convex parts 150 μm embossed pattern sinusoidal curve (configured so as to go straight to the flow of the printed pattern of wood grain) A gravure reverse coating method is used to fill the pattern, and an ultraviolet curable coating liquid (XD-
301 Applying a thickness of Dainichiseika Kogyo Co., Ltd., 16
Transparent top layer 1 cured by UV irradiation of 0 W x 2 lights
And a decorative sheet A having an uneven pattern inside according to the present invention.
Got Example 2 A decorative sheet A having an uneven pattern inside was obtained by forming an uneven pattern on the sheet having the same structure as in Example 1 except that only the embossing plate was replaced with the following. “Embossed plate” Depth 15 μm Pitch between protrusions 150 μm Embossed pattern Sine wave curve (configured so as to go straight to the flow of the printed pattern of wood grain) [Example 3] Uncured transparent top coat layer applied in Example 1 On the surface of the semi-cure state where 160 W × 1 light of UV irradiation was provided, a conduit portion 61 which is a recess for wiping with an embossed plate having a wood grain conduit pattern is provided.
Wiping processing for filling 31 with the following colored ink was performed in the recess. After that, the transparent resin layer was completely cured by re-irradiating with ultraviolet rays, and a decorative sheet A1 having a glittering concave-convex pattern 6b inside and a conduit pattern 31 by wiping on the top layer of the surface of the present invention was obtained. Wiping ink: Two-component curing type urethane-based coloring ink [Example 4] The transparent top layer was calendered with a mirror surface plate in a semi-cure state as processed in Example 3 and then completely re-irradiated with ultraviolet rays. After being cured, a decorative sheet A2 having a transparent surface mirror 32 having an uneven pattern inside was obtained according to the present invention.

The formation state of the uneven pattern on the sheet of the embodiment,
Also, the "shining feeling", which is a design effect, was visually confirmed, and the following results were obtained according to the following evaluation criteria. Evaluation Criteria: Concavo-convex pattern formation status O: Internal concavo-convex pattern formation can be confirmed. ×: No internal uneven pattern is formed. Irritating feeling ○: Irritating feeling can be confirmed. ×: No feeling of shinyness

[Table 1]

[0020]

As described above, according to the present invention, a glittering layer and a pattern layer are sequentially provided on a colored opaque thermoplastic resin sheet, and then a transparent thermoplastic resin layer having a thickness of 60 μm or less is formed. It is configured so that the embossing to be applied reaches the pattern layer, the glittering resin layer, and the thermoplastic resin sheet, and the embossing is performed at the time of heat bonding and the uneven pattern surface is filled with the transparent resin layer containing the matting agent. is there. Therefore, the ground color of the plywood is hidden by the colored and opaque thermoplastic resin sheet,
It was possible to obtain a decorative sheet having a smooth, soft luster provided by the surface of the transparent top layer and internal embossing with a deep feeling. And since this uneven pattern shape is a pattern consisting of parallel curved lines, the movement of reflected light due to the embossed pattern occurs depending on the viewing angle, and it has an effect very similar to the "shining feeling" of natural wood. . Furthermore, a transparent top layer was embossed in a semi-cure state, and an image was formed by wiping, whereby a decorative sheet having a three-dimensional effect could be obtained. Also, by applying a mirror finish to the surface of the transparent top layer in a semi-cured state, the surface state becomes smoother and the transparency increases, and a decorative sheet with high design is obtained in combination with the "shining feeling" obtained from the internal uneven pattern. I was able to.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a cross-sectional state of a decorative sheet of the present invention after printing.

FIG. 2 is a conceptual diagram showing a cross-sectional state on the surface of the decorative sheet of the present invention which has been wiped.

FIG. 3 is a conceptual diagram showing a cross-sectional state of the decorative sheet of the present invention whose surface is mirror-finished.

FIG. 4 is a conceptual diagram showing a line groove pattern expressing an uneven pattern.

[Explanation of symbols]

A A decorative sheet with an uneven pattern inside A1 A decorative sheet with an uneven pattern inside by applying a pattern to the surface by wiping A2 A decorative sheet with an uneven pattern inside with a mirror finish on the surface 1 Transparent top layer 2 Transparent heat Plastic resin layer 3 Pattern printing layer 31 Recessed colored pattern layer formed on transparent top layer 4 Glittering layer 5 Colored opaque thermoplastic resin sheet 6a Concavo-convex pattern formed on transparent thermoplastic resin layer 6b Glitter layer formed Concavo-convex pattern 61 Recesses formed on the transparent top layer for wiping 62 Mirror-like surface layer formed on the transparent top layer

Claims (5)

[Claims] 1. An uneven pattern formed when a transparent thermoplastic resin layer having a thickness of 60 μm or less is laminated on the pattern layer surface of a colored thermoplastic resin sheet having a glitter layer and a pattern printing layer on the surface of the colored thermoplastic resin sheet. A decorative sheet having an internal concavo-convex pattern, characterized by comprising the transparent thermoplastic resin layer and a transparent top layer. 2. A decorative sheet having an internal concavo-convex pattern, characterized in that the transparent top layer according to claim 1 is formed by coating. 3. A decorative sheet having an internal concavo-convex pattern, characterized in that the concavo-convex pattern according to claim 1 is composed of parallel parallel lines. 4. A decorative sheet having an internal uneven pattern, wherein the uneven pattern layer of the transparent top layer according to claim 1 is different from the one formed on the transparent thermoplastic resin layer. 5. A decorative sheet having an internal concavo-convex pattern, wherein the transparent top layer according to claim 1 is in a mirror surface state.