JPH11207920A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet which has a deep uneven pattern with deep recessed parts in harmony with a picture pattern and generates no white line on its end face and exhibits excellent secondary processabilities such as V-cutting and wrapping. SOLUTION: In a decorative sheet 1 wherein after a picture pattern layer, as necessary, contg. a colored layer and a liq. repellent picture pattern layer prepd. with a liq. repellent curable ink and being harmony with the picture pattern layer are formed, a top coat layer is applied furthermore on the whole face of the top face by using a transparent ink with a property being repellent by the liq. repellent picture pattern layer and the top coat layer of the parts where the liq. repellent picture pattern layer is formed is repelled to form recessed parts, the decorative sheet 1 wherein the base material sheet consists of a polyester resin film 2 contg. a coloring agent is provided.

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 concave portions synchronized with a picture, which is provided for the purpose of providing a surface design such as various kinds of furniture and building interior materials and protecting the surface.

[0002]

2. Description of the Related Art Conventionally, a decorative sheet having a concave portion formed in synchronism with a pattern on the surface is known 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. I have. This decorative sheet, for example,
(1) When a liquid-repellent ink composition is partially printed on the surface of a paper-based substrate sheet, a synthetic resin paint is applied to the entire surface of the printed matter and dried to obtain a liquid-repellent property. The synthetic resin paint on the part printed with ink is repelled to form that part as a recess. As another means, (2) a method using a thermoplastic resin film having a cavity in a base sheet is known.

However, the conventional decorative sheet of (1) uses a paper-based sheet as the base sheet.
Since the ratio of the ink having a liquid repellency and the synthetic resin paint absorbed by the base sheet is increased, the liquid repellent effect is reduced, and the unevenness is reduced. Therefore, it is conceivable to apply a thick synthetic resin paint in order to increase the liquid repellent effect.However, the liquid repellent is not sufficiently performed, the synthetic resin paint remains on the pattern containing the liquid repellent, and the unevenness becomes small. I will. Further, when the base sheet is a paper-based sheet, the interlayer strength is weak, so that it is necessary to lower the surface adhesion, and therefore, a synthetic resin paint to which a liquid repellent such as wax, silicone, or a fluorine compound is added is used. Used
Since the liquid repellent ink is applied to the ink, the liquid repellent is not sufficiently applied in this case as well, and the synthetic resin paint remains on the pattern containing the liquid repellent agent, the unevenness is reduced, and the three-dimensional effect is poor. It will be. Further, since the workability of the base sheet is weak, there is a problem that cracks are generated in secondary processing such as V cut and lapping.

In the case of the decorative sheet of the above (2),
Since a thermoplastic resin film with cavities is used in the base sheet, there is no absorption of the liquid-repellent ink and synthetic resin paint on the base sheet, so that the liquid repellency is sufficiently performed and the three-dimensional effect is excellent. In addition, the problem of secondary processing such as V-cut and wrapping was solved because of excellent workability of the base sheet. However, when a brown-colored decorative sheet such as a grain pattern was used, white lines were conspicuous on the end face. There is a problem that the design is inferior and that it is easily peeled from the cavity layer.

[0005]

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 provide a pattern having a deep concave and convex pattern synchronized with a picture pattern, and a white line on an end face. It is an object of the present invention to provide a decorative sheet which is free from occurrence of vignettes and has excellent secondary workability such as V-cut and wrapping.

[0006]

Means for Solving the Problems To achieve the above object, a solution of the present invention is to provide, on one surface of a substrate sheet, a picture pattern layer including a colored underlayer, if necessary, After forming a lyophobic pattern layer with a curable ink having lyophobic property on the top, by applying a top coat layer on the upper surface using a transparent ink having the property of being repelled by the lyophobic pattern layer, the lyophobic pattern layer In the decorative sheet in which the top coat layer in the portion where the is formed is repelled to form a concave portion, the base sheet is made of a polyester resin film containing a coloring agent. With this configuration, the base sheet does not absorb the curable ink and the transparent ink having the lyophobic property, so that the design property is large in the lyophobic effect and excellent in a three-dimensional effect. In addition, since the base sheet is made of a polyester resin film containing a colorant, even when a brown-colored decorative sheet such as a grain pattern is formed, there is no white line on the end face of the decorative sheet, and strength, heat resistance, and particularly heat resistance Because of its excellent dimensional stability, the dimensions of the sheet are stable even during printing and when the top coat layer is cured, making it possible to make a decorative sheet with very high designability. Secondary processing properties such as V-cut and wrapping And a decorative sheet that can be easily disposed of by burning or the like.

[0007] Further, the invention is characterized in that the colorant comprises an inorganic pigment. By doing so, in particular, it is also excellent in light resistance, and also makes the base sheet have concealing properties, can be unaffected by the color of the base material to be bonded, and has excellent design properties It can be a decorative board.

Further, a transparent resin layer is provided between the picture pattern layer and a liquid-repellent picture layer made of a curable ink having liquid repellency. By doing so, the abrasion resistance is improved, and it is possible to make the fine and complicated uneven pattern have more depth.

Further, since the base sheet is made of a polyester resin film having an excellent interlayer strength, the transparent ink for forming the top coat layer does not contain a slipping agent so that the surface such as cellophane tape resistance can be obtained. It is possible to form unevenness having a large step with a higher lyophobic effect without causing a problem in physical properties.

[0010] Further, the top coat layer is formed in a thickness of 10-15.
By having a thickness of μm, a decorative sheet having a large unevenness and a very excellent design property can be obtained, and the coating amount is large, so that the decorative sheet is also excellent in abrasion resistance.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a laminated structure of an embodiment of the decorative sheet of the present invention, and FIG. 2 is a sectional view showing a laminated structure of another embodiment of the decorative sheet of the present invention.
Reference numeral 10 denotes a decorative sheet, 2 denotes a colored polyester resin film, 3 denotes a solid printing layer, 4 denotes a picture printing layer, 5 denotes a lyophobic picture layer, 6 denotes a top coat layer, and 7 denotes a transparent resin layer.

As shown in FIG. 1, a decorative sheet 1 of the present invention is provided with a solid printing layer 3 and a picture printing layer 4 made of ordinary ink on the surface of a colored polyester resin film 2.
A liquid-repellent pattern layer 5 made of a liquid-repellent ink is provided on the upper surface, and then a transparent ink is applied on the entire surface including the liquid-repellent pattern layer 5 to form a top coat layer 6 repelled by the liquid-repellent pattern layer 5. belongs to.

The colored polyester resin film 2 used in the present invention is a film that is melt-extruded from a so-called extrusion die, and is usually a film oriented biaxially in a vertical direction and a horizontal direction. And a polymer obtained by condensation polymerization from glycol, and the dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, adipic acid,
Sebacic acid and the like, and as the glycol,
Examples include ethylene glycol, trimethylene glycol, tetramethylene glycol, cyclohexane dimethanol, 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.

In the present invention, it is necessary that the resin layer contains a pigment and / or a dye. Pigments can be classified into inorganic pigments and organic pigments, and as inorganic pigments, titanium oxide white, zinc white, lead white,
Gabon black, red stalks, vermilion, graphite, ultramarine, cobalt blue, cobalt purple, zinc chromate, and the like.
Typical organic pigments include phthalocyanine, dioxazine, and anthraquinone pigments, such as quinacridone, watch angred, and dioxazine violet. Dyes can be classified into natural dyes and synthetic dyes. Examples of the natural dyes include indigo (indigo). Examples of the synthetic dye include an azo dye, an indigoid dye, a sulfur dye, a nitro dye, and a nitroso dye. These pigments and dyes can be used alone or in combination of two or more, and inorganic pigments are most suitable for providing excellent light resistance and hiding the base sheet.

If necessary, the colored polyester resin film 2 may be subjected to a surface treatment, that is, a so-called coating may be provided with a primer treatment for improving the adhesion of the printing ink or a primer for adhering to the back substrate. Things. The thickness of the colored polyester resin film 2 is preferably 20 to 100 μm, and is preferably 40 to 50 μm from the viewpoint of cost and good handling during use.

On the upper surface of the colored polyester resin film 2, if necessary, a solid printing layer 3 and a pattern printing layer 4 for producing a straight-grained or board-grained wood pattern such as, for example, oak, teak or walnut are usually provided. These inks are formed by gravure printing with ink. As the inks for forming the solid printing layer 3 and the picture printing layer 4 with these normal inks, there are conventional cellulose-based, vinyl chloride-vinyl acetate-based, acrylic-based, and acrylic polyol-based binders. A resin-based resin is used, and in order to be able to express the "shine" of the wood grain well, it is preferable to add a glitter pigment such as a pearl pigment or a metal powder.

The curable ink used to form the liquid-repellent picture layer 5 includes a thermosetting composition which shrinks when cured, and a plasticizer or solvent contained in the printed pattern layer, which is volatile or free. 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 upon curing, 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 are preferred.

In the liquid repellent substance contained in the pattern layer of the present invention, the critical surface tension of the surface of the pattern layer containing the liquid repellent substance becomes smaller than the value of the surface tension of the varnish applied to form the transparent resin layer. Use things. For example, there are wax, silicone, and fluorine compound. As the wax, paraffin, wood wax, beeswax and other natural materials,
Synthetic substances such as polyethylene and polypropylene can be used. Further, as the silicone, C—S is used as a terminal group.
Compounds having one or more of ₁₁ , ₁₁ , ₁₂ and ₁₃ in combination or a mixture of one or more in the form of oil, rubber, resin and surfactant can be used. As the fluorine compound, a compound having C—F ₁ , C—F ₂ , and C—F ₃ in a terminal group,
Compounds having one or more compounds singly or as a mixture and having properties of oil, rubber, resin and surfactant can be used. The amount added is 4 to the ink composition.
Preferably, it is mixed in an amount of up to 10% by weight.

The liquid-repellent pattern layer 5 is preferably provided using an ink having a higher matting degree than the top coat layer 6 in order to make the portion look like 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.

The top coat layer 6 of the present invention uses a resin varnish forming the top coat layer 6 in which the surface tension value is 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. Further, inorganic and / or organic fine particles such as silica and plastic beads may be added to the top coat layer 6 as a matting agent and a surface reinforcing agent. Further, by forming the top coat layer 6 with a transparent ink having a composition containing no slip agent composed of wax, silicone, fluorine compound and the like, the top coat layer 6 is formed with the liquid repellent pattern layer 5 made of a curable ink containing a liquid repellent substance. This is preferable because the difference in critical surface tension can be made larger. That is, the unevenness pattern on the surface becomes deeper, and it becomes possible to express a design with further emphasis on the three-dimensional effect, and it becomes a decorative sheet excellent in abrasion resistance.

FIG. 2 shows another configuration of the decorative sheet of the present invention.
As shown in FIG. 2, a transparent resin layer 7 is formed on the entire surface of the solid printing layer 3 and the picture printing layer 4 made of ordinary ink provided on the surface of the colored polyester resin film 2, and thereafter, the transparent resin layer 7 The liquid-repellent pattern layer 5 may be formed using a curable ink containing a liquid-repellent substance, and then applied to form a top coat layer 6.
That is, the solid print layer 3, the picture print layer 4, and the lyophobic picture layer 5
By forming the transparent resin layer 7 in between, the abrasion resistance of the pattern printing layer is improved and a deeper design can be expressed. Here, by using a urethane resin, particularly a urethane resin having a glass transition temperature of 35 to 45 ° C., as the transparent paint for forming the transparent resin layer 7, the adhesion between the pattern printing layer 4 and the liquid-repellent pattern layer 5 and the makeup are improved. The elongation percentage of the entire sheet can be improved, and a decorative sheet having excellent secondary workability such as V-cut and wrapping can be obtained.

Although not shown, a primer layer made of a polyester-based urethane resin is provided between the colored polyester resin film 2 of the decorative sheets 1 and 10 and the solid printing layer 3 made of ordinary ink, as shown in FIGS. In doing so, the colored polyester resin film 2
In addition to improving the adhesion between the decorative sheet 1 and the solid print layer 3, the decorative sheets 1 and 10 are imparted with flexibility and elongation, and can exhibit excellent workability. In particular, a polyester urethane resin comprising a polyester polyol prepared by a polycondensation reaction of adipic acid and butylene glycol and an alicyclic polyisocyanate is preferred. Further, the curable ink containing the liquid-repellent substance forming the liquid-repellent pattern layer 5 is prepared by mixing the amino-alkyd resin, particularly the mixing ratio of the melamine resin and the alkyd resin with 100 to 200 parts by weight of the alkamine resin per 100 parts by weight of the melamine resin. By using the amino alkyd resin having the above range, the adhesion between the liquid repellent pattern layer 5 and the top coat layer 6 is improved.

In order to manufacture a decorative board using the decorative sheet of the present invention, the decorative sheet obtained above is coated with a vinyl acetate resin, a urea resin, an epoxy resin, a urethane resin, etc. Using adhesive, plywood, MDF,
It is to be bonded and laminated on a substrate such as a particle board.
Further, in the production of the decorative sheet, a primer layer such as a polyester resin may be provided in advance on the back surface of the decorative sheet in order to strengthen the adhesion between the decorative sheet and the substrate.

EXAMPLE 1 A nitrocellulose alkyd-based resin (manufactured by The Inktech Co., Ltd.) was coated on the surface of a colored polyester resin film (manufactured by Diafoil Co., Ltd., Z-2102) having a thickness of 50 μm.
KL-MAX) is used to carry out gravure printing of the colored solid ink layer and the wood pattern pattern layer, and the amino alkyd resin ink containing a liquid repellent agent for the conduit pattern synchronized with the wood pattern pattern layer (The Inktec Co., Ltd.) S Co., Ltd.
EC amino) and gravure printing to provide a lyophobic pattern layer.
By removing the solvent by heating at 0 ° C. for 3 seconds,
The liquid-repellent design ink resin is cured. Further, a transparent paint (DAISEC, manufactured by The Inktec Co., Ltd.) of 10 g / m2 is formed on the entire printing surface with a polyester polyol resin.
² (Dry) coating and curing by heating at 190 ° C. for 20 seconds to produce a decorative sheet having a concave conduit pattern synchronized with the wood pattern pattern layer.

Example 2 A nitrocellulose alkyd-based resin (manufactured by The Inktech Co., Ltd.) was coated on the surface of a colored polyester resin film (manufactured by Diafoil Co., Ltd., Z-2102) having a thickness of 50 μm.
KL-MAX) is used to perform gravure printing of the colored solid ink layer and the grain pattern layer, and a transparent urethane resin is applied thereon in an amount of 6 to 8 g / m ² (dry). The tuned conduit pattern was gravure-printed with an aminoalkyd-based resin ink containing a liquid repellent (SEC Amino, manufactured by The Inktech Co., Ltd.) to form a liquid-repellent pattern layer, and the solvent was removed by heating at 180 ° C. for 3 seconds. At the same time, the liquid-repellent design ink resin is cured. Further, a transparent paint made of a polyester polyol resin is applied on the entire printing surface (DAISEC, manufactured by The Inktech Co., Ltd.)
Was applied at a rate of 10 g / m ² (dry) and cured by heating at 190 ° C. for 20 seconds to prepare a decorative sheet having a concave conduit pattern synchronized with the grain pattern layer.

Comparative Example 1 A decorative sheet was produced in the same manner as in Example 1 except that a thin paper for building material weighing 30 g / m ² was used as a base sheet.

Comparative Example 2 As a base sheet, a polyester film having a cavity with a thickness of 50 μm (Crisper G type, manufactured by Toyobo Co., Ltd.)
A decorative sheet was prepared in the same manner as in Example 1 except that を was used.

A decorative sheet was prepared by bonding the decorative sheets of Examples 1 and 2 and Comparative Examples 1 and 2 to a 2.7 mm thick MDF using an ethylene-vinyl acetate adhesive.
The obtained decorative board was subjected to a V-cut test, an abrasion test, and a cellophane tape test, and the results are shown in Table 1. In addition, the first and second embodiments described above.
The polyester polyol-based resin which is the transparent paint used in Comparative Examples 1 and 2 does not contain a slip agent. (1) V-cut test From the back of the obtained decorative board, V-cut was performed using a V-cut cutting machine.
Cut processing was performed. At this time, the distance from the back surface of the sheet to the deepest apex of the V-cut was set to 0 μm,
After being left in an atmosphere at a temperature of 24 ° C. for 24 hours, an adhesive was applied to the V-cut surface, bent, fixed with a cellophane tape, and bent, and the outer corners of the folded decorative sheet were comparatively evaluated. [Comparative evaluation (length of sheet crack)] ：: 0%, ：: 0 to 5%, Δ: 5 to 10%, ×: 10% or more (2) Abrasion test According to the abrasion B test specified by Japanese Agricultural Standards The rotation speed when the wear end point is reached is read to determine the wear value. (3) Goban eye cellophane tape test 100 that reaches the substrate at 2 mm intervals with a cutter knife
Cellophane adhesive tapes (Nichiban, Scotch tape) were crimped on the surface. After that, peel off rapidly and count the number of remaining coatings

[0029]

[Table 1] From the above results, the decorative sheet using the colored polyester resin film as the base sheet has both good V-cut workability and good gobang-like adhesion, and furthermore is a curable type having a liquid repellency with the picture layer including the colored layer of Example 2. The case where the transparent resin layer is provided between the ink and the liquid-repellent picture layer shows good results also in terms of abrasion.

[0030]

As described above, the decorative sheet of the present invention has a large lyophobic effect and an excellent three-dimensional effect because the base sheet does not absorb the curable ink and the transparent ink having lyophobic properties. Developed design characteristics. In addition, since the base sheet is made of a polyester resin film containing a coloring agent, even when a brown-colored decorative sheet such as a grain pattern is formed, no white line is generated on the end face of the decorative sheet, and the strength and heat resistance, particularly Excellent heat resistance dimensional stability,
The dimensions of the sheet are stable during printing and when the top coat layer is cured, making it possible to make a decorative sheet with very high designability. It is also excellent in secondary workability such as V-cut and wrapping. It becomes a decorative sheet that can be easily disposed of.

Further, by using an inorganic pigment as a coloring agent for the base sheet, the light resistance is excellent, and by providing the base sheet with concealing properties, the influence of the color of the base material to be bonded can be reduced. This makes it possible to obtain a decorative plate excellent in design.

Further, by providing a transparent resin layer between the picture pattern layer including the colored base layer and the liquid repellent picture layer made of the curable ink having liquid repellency, a decorative sheet excellent in abrasion resistance can be obtained. .

Further, by forming the top coat layer with a transparent ink containing no slip agent, unevenness having a higher liquid repellency and a large step can be obtained without causing any problem in surface physical properties such as cellophane tape resistance. Can be formed, so that a decorative sheet excellent in three-dimensional effect can be obtained.

Further, the top coat layer has a thickness of 10 to 15 μm.
By having the thickness, a decorative sheet having a large unevenness and a very excellent design property can be obtained, and a decorative sheet excellent in abrasion resistance can be obtained since the applied amount is large.

[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.

FIG. 2 is a cross-sectional view showing a laminated structure of another embodiment of the decorative sheet of the present invention.

[Explanation of symbols]

 1, 10 decorative sheet 2 colored polyester resin film 3 solid printing layer 4 picture printing layer 5 liquid repellent picture layer 6 top coat layer 7 transparent resin layer

Claims (5)

[Claims] 1. After forming a picture pattern layer including a colored base layer as required on one surface of a base sheet, and forming a liquid-repellent picture layer of a curable ink having liquid repellency on the picture pattern layer. ,
By applying a top coat layer on the upper surface using a transparent ink having the property of being repelled by the lyophobic pattern layer,
A decorative sheet wherein the top coat layer at the portion where the liquid repellent pattern layer is formed is repelled to form a concave portion, wherein the base sheet is made of a polyester resin film containing a coloring agent. 2. The decorative sheet according to claim 1, wherein the colorant comprises an inorganic pigment. 3. The decorative sheet according to claim 1, wherein a transparent resin layer is provided between the pattern layer and a liquid-repellent pattern layer made of a curable ink having liquid repellency. 4. The decorative sheet according to claim 1, wherein the transparent ink forming the top coat layer does not contain a slip agent. 5. The decorative sheet according to claim 4, wherein the top coat layer has a thickness of 10 to 15 μm.