JPH08132581A - Decorative sheet - Google Patents

Abstract

PURPOSE: To provide a decorative sheet which is excellent in scratch resistance of a surface at an economical cost by a method wherein texture and glossy feeling which are near to those of a real stuff are displayed even though there is no conformity of an irregular pattern to a printed pattern. CONSTITUTION: A decorative sheet is provided wherein a fine irregular pattern layer 5 formed by curing an ionizing radiation setting resin, a transparent or semitransparent plastics film layer 4, a printed pattern layer 2, and a base sheet layer 1 are laminated in this order from a front surface; it is composed of a gathering of irregular shaped areas in which an irregular pattern is partitioned by a closed curve; a wire-like groove is provided in the area, and wires in two areas adjacent to each other via any side of the area have always different directions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to interior materials, decorative materials for furniture and cabinets.

[0002]

2. Description of the Related Art Conventional decorative sheets used in the above fields include plastic sheets mainly made of vinyl chloride, paper,
In many cases, a printed pattern is provided on a base sheet made of wood, metal or a composite thereof, and a polyurethane resin or the like is overcoated on the printed pattern. Further, a decorative sheet having a printed pattern provided on a vinyl chloride sheet or the like and a transparent vinyl chloride sheet doubling and embossed on the printed pattern is generally used mainly in furniture, cabinets and the like. Recently, by using an ionizing radiation curable resin, the uneven transparent layer that reproduces the uneven pattern of natural wood, stone, etc. is laminated on the printed pattern of the same natural material to reproduce a more realistic texture and excellent design feeling. Makeup sheets are used.

[0003]

However, a substrate sheet provided with a printed pattern and overcoated with a polyurethane-based resin or the like is a flat plate because it is only an expression of the printed pattern, and the design is poor. There is a problem. Further, the doubling-embossed decorative sheet has a problem that it is impossible to express fine unevenness and it is difficult to synchronize the uneven shape with the lower handle. If the concavo-convex transparent layer that reproduces the concavo-convex pattern of natural wood or stone using ionizing radiation curable resin is laminated on the printed pattern of the same natural material, if the entrainment is perfect, it will surely be excellent. However, there is a problem that it is difficult to achieve perfect synchronization due to various factors during the processing process. As a result, the process loss increases and it becomes difficult to stably supply the finished sheet at an economical cost. The present invention has been made in view of the above problems. Even if the uneven pattern and the printed pattern are not synchronized, the glossy feeling of natural products, particularly stone materials, that is, the multidirectional fine shine is reproduced in harmony with the printed pattern. However, it is an object of the present invention to provide a decorative sheet having a texture and excellent in design at an economical cost.

[0004]

Means for Solving the Problems The present invention, which has been made to solve the above problems, has a fine concavo-convex pattern layer formed by curing an ionizing radiation curable resin in order from the surface, a transparent or semitransparent plastic film layer, A pattern layer and a base sheet layer are laminated, and the uneven pattern is composed of a set of irregularly shaped regions separated by a closed curve, and has a linear groove in the region, and any of the regions is formed. A gist of a decorative sheet is characterized in that lines in two areas adjacent to each other through a side have different running directions.

[0005]

According to the present invention, it is possible to reproduce an excellent texture, a glossy feeling, a wood grain feeling, and the like without synchronizing the printed pattern and the concavo-convex pattern, and to give the surface scratch resistance.

[0006]

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a schematic diagram showing a basic layer structure of a decorative sheet 10 according to the present invention. A pattern such as a stone pattern is printed on the surface of the base material sheet 1 to provide the printed pattern layer 2. Target print patterns include geometric patterns in addition to patterns such as stone, wood, abstract patterns, cloth, and sand. Among these, it is desirable to enhance the synergistic effect of the concavo-convex pattern 6 described later in detail and the decoration. On the other hand, a transparent concavo-convex layer 5 made of an ionizing radiation curable resin is formed on the surface of the transparent film 4 by the method described later, and laminated on the printed surface of the base sheet 1. In this case, if both the base sheet 1 and the transparent film 4 are made of vinyl chloride, they can be laminated by thermal lamination, but if they are made of different materials, an adhesive layer 3 made of urethane or the like is provided to perform dry lamination. Stack.

Generally, a thermoplastic plastic sheet such as vinyl chloride is preferably used as the base sheet 1, but a wood-based, metal-based, paper-based or glass-based sheet may be used depending on the application of the decorative sheet. .

The print pattern layer 2 is composed of a print ink layer, and includes known colorants such as pigments and dyes, extender pigments, solvents, stabilizers,
It can be formed by printing with a printing ink in which a plasticizer, a catalyst, a curing agent and the like are appropriately mixed in a vehicle as necessary.
The vehicle may be selected from thermoplastic resins, thermosetting resins, ionizing radiation curable resins, etc., depending on the required physical properties, printability, and the like. As the pigment, a commonly used organic or inorganic pigment can be used. As the diluting solvent, a liquid solvent is used which has the ability to dissolve and disperse a vehicle resin, a colorant such as a pigment, and other additives, and which has an appropriate drying property. Generally, the solubility parameter is similar to that of the vehicle. It is preferable to select a liquid solvent from the viewpoint of solubility. The printed pattern can be provided on the base material sheet 1 by using a known printing method such as gravure printing or silk screen printing.

The transparent film 4 may be translucent or colored. The thickness of the transparent film is 12
To 200 μm, polyethylene terephthalate, polyethylene naphthalate, polyarylate, polyether ether ketone, polyimide, etc., which have adequate sheet strength, dimensional stability, heat resistance, and ionizing radiation transparency, are selected appropriately. Can be used.

FIG. 2 is an explanatory view of the thermal lamination lamination method of the decorative sheet 10. The back surface of the transparent film 2 having the concavo-convex layer 5 formed on the front surface and the printing surface of the base material sheet 1 are overlapped with each other, and sandwiched between the upper and lower hot plates 9 via the mirror plate 7 and the cushioning material 8 and thermocompression bonded. Stack.

A method for forming a fine concavo-convex pattern 6 on the surface of the transparent film 4 is a drum printing system (hereinafter referred to as DPS) to which a roll intaglio printing system is applied.
Done by The DPS will be described below with reference to FIG. 3, which is a conceptual diagram of the DPS. As shown in FIG. 3, the ionizing radiation-curable resin liquid 5 ′ is applied to the roll coater on the plate surface of the roll intaglio plate 11 in which the recesses 12 are formed by etching so as to form a desired uneven pattern 6. The applicator roll 13 is applied so that at least the concave portion 12 is filled. The recess 12 actually has a complicated cross-sectional shape as shown in FIGS. 1 and 2, but is shown as a conceptually simple triangular shape. Next, while supplying the transparent film 4 to the coated ionizing radiation-curable resin liquid 5 ′ at a traveling speed synchronized with the peripheral speed of the roll intaglio 11, the transparent film 4 is cured by the pressing roll 14 with the ionizing radiation curability. Contact the uneven surface of the roll intaglio 11 through the resin liquid 5 ',
While the ionizing radiation curable resin liquid 5'is held between the transparent film 4 and the roll intaglio 11, the transparent film 4
After the ionizing radiation is irradiated from the back surface of the ionizing radiation irradiation device 15 to cure the ionizing radiation curable resin liquid 5 ′,
Roll intaglio 11 in a state where the ionizing radiation curable resin 5 cured by the feed roll 16 is transferred to the transparent film 4.
Release from. According to the DPS described above, the fine and sharp recesses 12 formed on the roll intaglio 11 can be faithfully reproduced on the film substrate.

A T-shaped nozzle coating device may be used instead of the roll coater. Further, in order to prevent air bubbles from being mixed into the ionizing radiation curable resin liquid 5 ′ and to faithfully reproduce the concave and convex shape of the concave portion 12, it is desirable that the coating is performed on the roll intaglio 11 side. The concavo-convex pattern 6 can also be provided by applying the ionizing radiation-curable resin liquid 5'on the side and then pressing the coated surface of the resin liquid 5'on the roll intaglio 11.

When the roll intaglio 11 is coated with the ionizing radiation-curable resin liquid 5 ', a solvent-diluted ionizing radiation-curable resin is used in order to control the fluidity of the resin liquid 5'to some extent. You can In this case, although not particularly shown, it is necessary to dry the solvent in the resin liquid 5 ′ before irradiating the ionizing radiation from the ionizing radiation irradiation device 15 using a drying device such as warm air or an infrared heater. However, when such a solvent-diluted resin is used, the range of selection of usable resins is widened, and in addition, the coating property can be easily adjusted.

The ionizing radiation curable resin 5 released from the roll intaglio 11 and hardened is the uneven layer 5 itself and forms the uneven pattern 6. The ionizing radiation irradiation device 15 is used to sufficiently harden this. Ionizing radiation may be further irradiated from a separately installed ionizing radiation irradiation device (not shown).

The roll intaglio 11 is made of a metal such as chrome-plated copper or iron, glass, quartz, ceramics such as PLZT, or a synthetic resin such as silicon resin, and is photo-corroded, electroformed or milled. The recess 1 by a known method such as a method
2 can be engraved. In order to prevent heat damage to the transparent film 2 and the ionizing radiation-curable resin liquid 5 ′ to be applied during irradiation of ionizing radiation, or to adjust the viscosity, the inside of the roll intaglio 11 is hollow or has a double wall. It is preferable to adjust the temperature of the plate surface of the roll intaglio 11 by supplying cold water or hot water, cold air or hot air into the inside.

Generally, irradiation of ionizing radiation is carried out from the back surface side of the transparent film 2 as shown in the drawing, but the roll intaglio 11 is formed from an ionizing radiation permeable material such as quartz or glass, and the inside of the intaglio plate 6 ( Specifically, the irradiation may be performed by an irradiation device installed in the hollow of the roll), or irradiation may be performed from both sides of the back surface of the transparent film and the inside of the roll intaglio 11.

The ionizing radiation-curable resin used in the present invention is a resin which undergoes a crosslinking polymerization reaction upon irradiation with ionizing radiation to be polymerized and solidified (cured). For example, one or more acryloyl groups in the molecule. It is preferable to use a polymer, a prepolymer, or a monomer having a polymerizable group such as a group, a methacryloyl group, an acryloyloxy group, a methacryloyloxy group, or a thiol group, as a main component or a mixture.

Examples of the above polymers include acrylates such as polymethyl acrylate and polystearyl acrylate, and methacrylates such as polymethylmethacrylate and polystearyl methacrylate. Further, examples of the prepolymer include urethane acrylate, polyester acrylate, acrylates such as epoxy acrylate, urethane methacrylate,
Examples thereof include methacrylates such as polyester methacrylate and epoxy methacrylate, unsaturated polyesters and the like. Further, examples of the monomer include acrylates such as 2-phenoxyethyl acrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, and dipentaerythritol hexaacrylate, 2-phenoxyethyl methacrylate, tripropylene glycol dimethacrylate. Methacrylates such as acrylate, trimethylolpropane trimethacrylate, and dipentaerythritol hexamethacrylate may be mentioned.

In the present invention, ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking molecules, and such an electromagnetic wave such as visible light, ultraviolet ray, X-ray and the like. , Or there is a particle beam such as an electron beam, usually, ultraviolet rays, or an electron beam is used, when curing the ionizing radiation curable resin as described above, with visible light or ultraviolet rays, usually, acetophenones,
A photoreaction initiator such as benzophenones and thioxanthones is added in advance.

As the ionizing radiation irradiation device used for curing the ionizing radiation curable resin, when irradiating with ultraviolet rays, a light source such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a black light lamp, a metal halide lamp, etc. Can be used. In the case of irradiating with an electron beam, various electron beam accelerators such as Cockloft-Walton type, Van de Graaff type, resonance transformer type, insulating core transformer type, linear type, dynamitron type and high frequency type are used. In addition, when irradiating with an electron beam, it is usually 100-
It is preferable to irradiate with electrons having an energy of 1000 keV, preferably 100 to 300 keV, at a dose of about 0.1 to 30 Mrad.

The concavo-convex pattern 6 formed on the decorative sheet 10 of the present invention is a faithful reproduction of the concavo-convex pattern (indicated by the concavity 12) engraved on the roll intaglio 11. Can be used. Among the various concave and convex patterns described above, the decorative sheet 10 according to the present invention
As shown in FIG. 4, the most effective concave-convex pattern 6 has a linear groove in an irregular-shaped area 18 defined by a closed curve 17, and is adjacent to each other through an arbitrary side. This is based on a pattern in which a plurality of lines in a region are connected so that the running directions of the lines are always different. In FIG. 4A, there is a gap between the regions, and in FIG. 4B, they are adjacent to each other without a gap. In each case, the lines in each region form parallel groove shapes, but they may be curved shapes.

When such a concavo-convex pattern 6 is provided on a specific printed pattern such as a granite pattern, terrazzo, etc., the adjoining irregularly shaped regions 18 have different lusters, and the parallax causes a difference in each region. Since it is possible to create designs that change in gloss, it is possible to reproduce a natural granite pattern or a texture very close to terrazzo by matching well with the lower pattern granite pattern. What should be noted here is that since the concavo-convex pattern 6 as shown in FIG. 4 is used, there is no need for synchronization as in the case of a combination of a normal wood grain pattern and a conduit embossing plate. According to the decorative sheet of the present invention, the texture of natural stone material can be realistically reproduced without synchronization, so that defective products due to poor synchronization can be eliminated, and the yield as a decorative sheet can be greatly improved. Such a matching effect may be achieved by combining a wood grain pattern and a grain-like uneven pattern in addition to the stone material. In this case, the texture of natural wood is reproduced. Also, by combining an appropriate abstract pattern with the concavo-convex pattern shown in FIG. 4, a decorative sheet whose gloss changes depending on the viewing angle can be obtained.

Example 1 Transparent thermoplastic vinyl chloride sheet W-500, 0.08 m
m, 23 parts (manufactured by Riken Vinyl Industry Co., Ltd.) using a urethane acrylate-based ionizing radiation curable resin P-EX-36 (manufactured by Dainichiseika Co., Ltd.) by DPS on the decorative surface of FIG. The uneven pattern shown by is formed. The average size of the irregular deformation section region of this uneven pattern is 20μ.
m, and the number of lines in each area is 120 /
It was inches. The average depth of the groove on the line is 20 μm.
Met. In addition, the ozone high pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) 160 W / 2
I used a light. On the other hand, thermoplastic vinyl chloride sheet VS, 0.1 mm, 23 parts (Riken Vinyl Industry Co., Ltd.)
Grain gravure-printed with a granite pattern on the printed surface, and the concave / convex pattern surface of the vinyl chloride sheet provided with the concave / convex pattern on the printed surface is 140 ° C., and the pressing pressure is 10 kg /
Thermal lamination was carried out under the condition of cm ² for 30 minutes. In addition, it took 50 minutes when the temperature rising / falling time from room temperature was added. In addition, in the case of using this embodiment, not only the lamination by the above press but also 150 ° C., line speed 6 m / m
in. Double doubling is also a process. The decorative sheet thus obtained reflected external light in a polygonal manner, excellently reproduced the luster and texture of a natural granite pattern, and was also excellent in scratch resistance.

[0024]

EFFECTS OF THE INVENTION According to the present invention, the texture and luster of natural stones and the texture of natural wood can be reproduced very well, and the ionizing radiation curable resin is applied to the outermost surface of the decorative sheet. Since it has the uneven layer, it is possible to provide excellent scratch resistance. Further, since it is not necessary to synchronize the concave-convex pattern with the printed pattern, the productivity is improved, the production loss rate can be reduced, and the supply can be made at an economical cost.

[Brief description of drawings]

[Fig. 1] Basic layer structure diagram

FIG. 2 is an explanatory diagram of a thermal lamination lamination method.

FIG. 3 is a conceptual diagram of DPS.

FIG. 4 is an explanatory diagram of an uneven pattern.

[Explanation of symbols]

 1 Base Material Sheet 2 Printed Pattern Layer 3 Adhesive Layer 4 Transparent Film 5 Concavo-convex Layer, Cured Ionizing Radiation-curable Resin Layer 5'Uncured Ionizing Radiation-curable Sap 6 Concavo-convex Pattern 7 Mirror Surface Plate 8 Cushion Material 9 Heat Press Plate 10 Decorative sheet according to the present invention 11 Roll intaglio 12 Recessed portion 13 Applicator roll 14 Pressing roll 15 Ionizing radiation emitting device 16 Feeding roll 17 Closed curve 18 Divided area

Claims (2)

[Claims] 1. A laminate comprising a fine concavo-convex pattern layer formed by curing an ionizing radiation curable resin in order from the surface, a transparent or semitransparent plastic film layer, a printed pattern layer, and a substrate sheet layer. Makeup sheet to be. 2. The two-regions, wherein the concavo-convex pattern is composed of a set of irregularly-shaped regions separated by closed curves, has a linear groove in the regions, and is adjacent to each other through any side of the regions. 2. The parallel lines of the two lines have different traveling directions.
The described decorative sheet.