JP2000025189A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet which uses a base sheet having an uneven pattern formed on the first face and also shows design characteristics with three-dimensional feel and profundity tuned to a pictorial pattern using both first and second faces and at the same time, has outstanding fabrication quality such as V-cut and lapping. SOLUTION: A pattern-printed layer 3, a colored solid-printed layer 4 and a transparent resin layer 5 are formed in that order, on one of the faces of la transparent plastic film 2. On the other face of the transparent plastic film 2, a liquid-repellent pattern layer 6 using a liquid-repellent ink which is tuned to the pattern-printed layer 3, is formed. Further a top coat layer 7 is formed on the entire surface of the liquid-repellent pattern layer 6 using a transparent ink having such a nature that it is repelled by the liquid-repellent pattern layer 6. The top coat layer 7 formed on the part where the liquid-repellent pattern layer 6 is formed, is repelled to form a recessed part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet provided with a surface design such as various kinds of furniture and building interior materials, and affixed for the purpose of surface protection. .

[0002]

2. Description of the Related Art Conventionally, as a decorative sheet adhered to the surface of various kinds of furniture and building interior materials for the purpose of decoration or surface protection, a picture printing layer is provided on one side of a colored polyvinyl chloride sheet. A decorative sheet is used in which a transparent polyvinyl chloride sheet is stacked, embossed simultaneously with thermal lamination, and the embossed recesses are filled with a coloring ink by wiping, and a gloss adjusting layer is provided on the surface thereof. However, in connection with recent environmental problems, there is a problem that incineration treatment cannot be used as a waste material treatment means because chlorine compounds are generated when subjected to incineration treatment, and there is a problem that a decorative sheet containing no chlorine group is used. Is required. Further, the manufacturing process also requires three steps of printing, heat lamination, and emboss wiping, so that there is a disadvantage that a cost increase cannot be avoided.

Further, a colored polyester resin film is used for a base sheet, and a liquid-repellent ink composition is partially printed on the surface thereof, and then a synthetic resin paint is applied over the entire printed matter. It is known that a synthetic resin paint on the part printed with lyophobic ink is repelled to form a concave part after drying, but the coating film of the base sheet is hard and workability is weak. , V cut, wrapping etc.
There is a problem that cracks occur in the next processing and the workability is inferior,
Further, there is also a problem that it is difficult to prepare a large number of hues of the colored raw material because the coloring process of the base sheet is complicated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make a surface of a base material sheet a concave and convex pattern, and use a pattern pattern by using both front and back surfaces. Another object of the present invention is to provide a decorative sheet excellent in secondary workability such as V-cut and wrapping, in addition to a design with a three-dimensional effect and depth, which is in tune with the above.

[0005]

In order to achieve the above object, a solution of the present invention is to provide a pattern printing layer, a colored solid printing layer, and a transparent resin layer on one side of a transparent plastic film in that order. After forming a liquid-repellent pattern layer with an ink having liquid repellency synchronized with the pattern-printing layer on the other surface of the film, a transparent ink having the property of being repelled by the liquid-repellent pattern layer is further coated on the entire upper surface thereof. By using the top coat layer, the decorative sheet is characterized in that the top coat layer at the portion where the liquid repellent pattern layer is formed is repelled to form a concave portion. With this configuration, an embossed concavo-convex pattern is formed on the surface of the transparent plastic film, and a pattern is printed directly on the back surface of the transparent plastic film. Therefore, a thick transparent layer is interposed between the two patterns. The rear surface is concealed and provided, so that there is a difference between the positions of the front and back patterns, so that a deep expression is possible, and the design is excellent. In addition, by providing a pattern printing layer and a colored solid printing layer on one side of the transparent plastic film, and providing a transparent resin layer thereon, the color tone variation caused by the colored plastic film is eliminated, and the design is excellent in design. Can be reproduced, and the cost can be reduced by eliminating the need for stocking various types of colored plastic films having different hues, thereby providing a low-cost decorative sheet.

A liquid repellent pattern layer provided on the other surface of the transparent plastic film is synchronized with the pattern printing layer. By doing so, the designability can be further improved.

Further, the transparent plastic film is made of a polyester resin film.
By doing so, the heat resistance, especially the heat resistance dimensional stability, is excellent, so that the decorative sheet has a very high design quality because the dimensions of the sheet are stable even at the drying and curing temperature when forming the liquid repellent pattern layer and the top coat layer. And V cut,
It is also excellent in secondary workability such as wrapping, can use incineration as a means for treating waste material, and becomes a decorative sheet that can be easily disposed of.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a laminated structure of an embodiment of a decorative sheet according to the present invention, wherein 1 is a decorative sheet, 2 is a transparent plastic film, 3 is a picture printing layer, 4 is a colored solid printing layer, and 5 is a transparent resin layer. , 6 represent a liquid repellent pattern layer, and 7 represents a top coat layer.

As shown in FIG. 1, the decorative sheet 1 of the present invention has a top coat layer 7, a liquid repellent pattern layer 6, a transparent plastic film 2, a pattern print layer 3, a colored solid print layer 4, and a transparent solid layer. A configuration in which resin layers 5 are laminated,
A picture printing layer 3, a colored solid printing layer 4, and a transparent resin layer 5 are provided on the back side of the transparent plastic film 2 by a normal ink, and a lyophobic picture synchronized with the picture printing layer 3 is provided on the front side of the transparent plastic film 2. A layer 6 is provided, and then a transparent ink is applied to the entire surface including the liquid repellent pattern layer 6 to form a top coat layer 7 which is repelled by the liquid repellent pattern layer 6.

As the transparent plastic film 2 used as the base sheet of the decorative sheet 1 of the present invention, a polyolefin resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer or a polyester resin or the like has a chlorine group in its molecule. Is desirable, and heat resistance is required to withstand the high temperature of 150 to 190 ° C. required for forming the liquid repellent picture layer 6 and the top coat layer 7 provided on the surface of the transparent plastic film. Polyester resin films are preferred.

The transparent polyester resin film suitable for the present invention is a film melt-extruded from a so-called extrusion die, and is usually a film oriented in the biaxial directions of a longitudinal direction and a lateral direction. And a glycol obtained by condensation polymerization from glycol.Examples of dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, adipic acid, and sebacic acid. , Ethylene glycol, trimethylene glycol, tetramethylene glycol, cyclohexanedimethanol and the like. Specifically, for example, polyethylene terephthalate, polytetramethylene terephthalate, polyethylene-p-oxybenzoate, poly-1,4-cyclohexylene dimethylene terephthalate, polyethylene-
2,6-naphthalenedicarboxylate and the like. In the case of the present invention, polyethylene terephthalate is particularly preferred.

If necessary, the transparent polyester resin film is subjected to a surface treatment. A so-called coating may be provided with a primer treatment for improving the adhesion to the printing ink. The thickness of the transparent polyester resin film is preferably 25 to 100 μm, and preferably 40 to 50 μm from the viewpoint of cost and good handling during use.

On the lower surface of the transparent plastic film 2, for example, a picture printing layer 3 for showing a straight-grain pattern such as oak, teak or walnut, or a wood-grain pattern, and a colored solid printing layer 4 are formed with ordinary ink. The inks which are formed by gravure printing, and which form the pattern print layer 3 and the colored solid print layer 4 using these normal inks include:
Conventional cellulose-based, acrylic-based, acrylic polyol-based binder resin is used, and in order to be able to express the "shine" of the grain well, glitter pigments such as pearl pigments and metal powders are used. Those added are preferred. The colored solid printing layer 4 needs to be concealed, so that a high-concentration ink containing a large amount of pigment may be used. If the pigment content is large, delamination of the ink layer is likely to occur, and the adhesiveness to the decorative board substrate is poor. Therefore, it is preferable that the transparent resin layer 5 be provided on the surface of the colored solid printing layer 4.

In the present invention, the transparent resin layer 5 is used for improving the adhesiveness to the decorative board substrate and for preventing delamination of the colored solid printing layer 4. A urethane-based resin which forms a flexible and tough coating film by hydrogen bonding with each other and has excellent adhesion to the decorative board substrate and the colored solid printing layer 4 is preferable. The transparent resin layer 5 can be applied simultaneously with the picture printing layer 3 and the solid color printing layer 4 by a gravure printing method.

The curable ink used to form the liquid-repellent pattern layer 6 includes a thermosetting composition that shrinks upon curing, a plasticizer or a solvent contained in the printed pattern layer, and the volatilization and release of the plasticizer or solvent. Use a composition that sometimes shrinks. The thermosetting composition that shrinks during the above-mentioned curing can be selected from room temperature-curable resins, thermosetting resins, and ionizing radiation-curable resins. Among these, a urea resin composed of urea or a derivative thereof and formaldehyde, which is a thermosetting composition accompanied by a dehydration condensation reaction when cured, a melamine resin composed of melamine or a derivative thereof and formaldehyde, and the urea resin or the melamine resin described above Amino alkyd resins such as urea alkyd resins and melamine alkyd resins obtained by adding a modified alkyd resin to the initial product of the above are preferred.

The lyophobic substance contained in the lyophobic pattern layer 6 of the present invention has a critical surface tension of the surface of the pattern layer containing the lyophobic substance, the value of the surface tension of a varnish applied to form a transparent resin layer. Use smaller ones. For example, wax,
Examples include silicone and fluorine compounds. As the wax, natural waxes such as paraffin, wood wax and beeswax, and synthetic substances such as polyethylene and polypropylene can be used. The silicone is a compound having one or more of CS ₁₁ , CS ₁₂ , and CS ₁₃ in a terminal group alone or as a mixture. The properties of oils, rubbers, resins, and surfactants Can be used. Examples of the fluorine compound, a compound in terminal groups having a _{C-F 1, C-F} 2, C-F 3, alone or is a compound having one or more mixing, oil, rubber, resin, surfactant Anything that takes the properties of the agent can be used. It is preferable to add 4 to 10% by weight of the ink composition relative to the ink composition.

The liquid-repellent picture layer 6 is preferably provided using an ink having a higher matting degree than the top coat layer 7 so as to make the portion appear to be a concave portion so as to make the viewer feel stronger. An ink to which a coloring pigment such as carbon black is added may be used to approximate the color tone of the conduit.

As the top coat layer 7 of the present invention, a resin varnish forming the top coat layer 7 has a surface tension value larger than the critical surface tension value of the pattern layer containing the lyophobic substance. A normal resin varnish made of a thermoplastic resin, a thermosetting resin, an ionizing radiation-curable resin, or the like can be used depending on the application. Here, as the room temperature or thermosetting resin, an epoxy resin composed of an epoxy compound and an amine curing agent, and a urethane resin composed of a polyol compound and an isocyanate compound can be used. In addition, inorganic and / or organic fine particles such as silica and plastic beads may be added to the top coat layer 7 as a matting agent and a surface reinforcing agent.

In the decorative sheet 1 of the present invention, a pattern printing layer 3 and a colored solid printing layer 4 are formed on one surface of a transparent plastic film 2 by ordinary ink, and then the transparent plastic film 2 is inline with the printing.
On the other side, it is possible to print a picture such as a conduit in synchronism with the picture printing layer 3, so that the synchronized double-sided printing of the transparent plastic film 2 makes the decorative sheet 1 excellent in three-dimensional appearance and design. Manufacturing is possible.

In order to manufacture a decorative board using the decorative sheet 1 of the present invention, the transparent resin layer 5 of the decorative sheet 1 obtained above is coated on a vinyl acetate resin, a urea resin, an epoxy resin, a urethane resin or the like. Plywood, MDF,
It is to be bonded and laminated on a substrate such as a particle board.

Example 1 A transparent polyester resin film (S100, manufactured by Diafoil Co., Ltd., S100) having a thickness of 50 μm was coated with an ink made of a nitrified cotton-urethane resin (SAM, manufactured by The Inktech Co., Ltd.). A wood pattern pattern layer and a solid color printing layer are provided by a gravure printing method, and a urethane-based resin is
Apply to a thickness of μm and provide a primer layer. continue,
The film is turned over using a turn bar, and an aminoalkyd-based resin ink containing a liquid repellent is formed on the surface of the transparent polyester resin film by adjusting a conduit pattern synchronized with the wood grain pattern layer (SEC INC., Inc.) ) To provide a lyophobic picture layer by gravure printing, and remove the solvent and heat the lyophobic picture ink resin by heating at 150 ° C. for 20 seconds. Further, a transparent paint (DAISEC, manufactured by The Inktech Co., Ltd.) made of a polyester polyol resin is applied on the entire printing surface at 10 g / m ² (dry).
Apply and cure by heating at 190 ° C for 20 seconds,
A decorative sheet having a concave conduit pattern synchronized with the wood pattern pattern layer was prepared.

[0022]

As described above, in the decorative sheet of the present invention, the embossed uneven pattern is formed on the surface of the transparent polyester resin film, and the pattern is printed directly on the back surface of the transparent polyester resin film. Both patterns are well synchronized, and a thick transparent layer is interposed between the two patterns and the back side is concealed. It will be. In addition, a pattern printing layer and a colored solid printing layer are provided on one side of the transparent polyester resin film, and the transparent resin layer is provided thereon, thereby eliminating variations in color tone caused by the colored polyester resin film, and having excellent design properties. It is possible to provide a low-cost decorative sheet that enables reproduction of a patterned image and reduces costs by eliminating the need for stocking various kinds of colored polyester resin films having different hues.

Further, since the sheet has excellent heat resistance, especially heat resistance dimensional stability, the dimensions of the sheet are stable during printing and when the top coat layer is cured, so that a decorative sheet having a very high designability can be obtained. It is possible to obtain a decorative sheet which is excellent in secondary workability such as V cut and wrapping and can be easily disposed of by burning or the like.

[Brief description of the drawings]

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

[Explanation of symbols]

 Reference Signs List 1 decorative sheet 2 transparent plastic film 3 picture printing layer 4 colored solid printing layer 5 transparent resin layer 6 liquid repellent picture layer 7 top coat layer

Continued on front page F term (reference) 4F100 AJ06 AK01A AK35 AK41A AK51 AL05 AR00B AR00C AR00D AR00E BA05 BA07 BA10D BA10E GB08 GB81 HB00B HB00C HB00E HB21E HB31C JB06E JJ02 JL00 JL02 JLN JL01

Claims (3)

[Claims] 1. A pattern printing layer, a colored solid printing layer, and a transparent resin layer are sequentially provided on one surface of a transparent plastic film,
After forming a liquid-repellent pattern layer with a liquid-repellent ink on the other surface of the transparent plastic film, a topcoat layer is further formed on the entire upper surface by using a transparent ink having the property of being repelled by the liquid-repellent pattern layer. Wherein the top coat layer at the portion where the liquid repellent pattern layer is formed is repelled to form a concave portion. 2. The decorative sheet according to claim 1, wherein a liquid-repellent picture layer provided on the other surface of the transparent plastic film is synchronized with the picture printing layer. 3. The method according to claim 1, wherein said transparent plastic film is made of a polyester resin film.
Or the decorative sheet according to any one of 2.