JP3853427B2 - Decorative sheet and decorative board using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decorative sheet that is affixed to various furniture and building interior materials for the purpose of decoration or surface protection.
[0002]
[Prior art]
Conventionally, as such a decorative sheet, a decorative sheet in which a transparent vinyl chloride resin film is laminated after printing on a vinyl chloride resin film by a usual method is known. The reason why the vinyl chloride resin film is used for the base sheet is the general-purpose resin, low manufacturing cost, easy coloring, good laminating process, easy embossing, vacuum forming processability, V-cut process This is because the ease of secondary and tertiary processing such as property is good or balanced as compared with other resins. However, in relation to recent environmental problems, there is a problem that incineration treatment cannot be used as a waste material treatment means because it generates chlorine compounds when subjected to incineration treatment, and vinyl chloride resin containing no chlorine group Non-sheets are required.
[0003]
On the other hand, as a material for overcoming such drawbacks of the vinyl chloride resin film, a pattern printing layer is formed on a polyolefin resin film such as polyethylene or polypropylene on a base sheet, and a transparent acrylic resin film is laminated thereon. Although a decorative sheet has been proposed, when a two-component curable urethane resin is used as a printing ink for forming a pattern printing layer, it has excellent adhesion to a polyolefin-based resin film that is a base sheet, Uses vinyl chloride-acrylic resin ink, which has poor thermal adhesion with the transparent acrylic resin film as a surface protective layer and lacks peeling strength, and excellent thermal adhesion with the transparent acrylic resin film. However, it has sufficient adhesion such as peeling strength, but promotes deterioration of the weather resistance of polyolefin resin film. And, the polyolefin-based resin film is discoloration, and weakened there is liable.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of such problems, and its object is to generate extremely little harmful gases such as chlorine compounds when using incineration treatment as waste material treatment means, weather resistance, adhesion It is to provide a decorative sheet having excellent design properties suitable for V cut processing and lapping processing.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the solution means of the present invention comprises a polyolefin resin film layer, a primer resin layer, a pattern printing layer, a thermal adhesive resin layer, and a transparent acrylic resin film layer laminated in order from the bottom. In the decorative sheet, the primer resin layer is made of a two-component curable urethane resin, and the thermal adhesive resin layer is made of a vinyl acetate-acrylic resin.
By adopting this configuration, when subjected to incineration, the generation of chlorine compounds is extremely small, and it can be subjected to disposal by incineration. In addition, the acrylic resin film and the heat which is the surface protective layer is the ink constituting the pattern printing layer by laminating a vinyl chloride-acrylic resin layer between the pattern printing layer and the transparent acrylic resin film. Even if it is not suitable for laminating, the base sheet layer and the surface protective layer can be heat laminated. Moreover, deterioration of the weather resistance of the polyolefin resin film can be prevented by providing a two-component curable urethane resin layer on the upper surface of the polyolefin resin film.
[0006]
The two-component curable urethane resin layer constituting the primer resin layer is a decorative sheet having a film thickness of 5 μm or more.
By setting it as this structure, deterioration of the weather resistance of a decorative sheet can be prevented.
[0007]
Further, embossing is performed on the upper surface of the transparent acrylic resin film layer to form an embossed recess, and further, the embossed recess is filled with a colored ink by wiping, and then a gloss adjusting resin layer is provided. Thereby, the design property of a decorative sheet can be improved.
[0008]
Furthermore, a gloss difference is formed between the gloss adjusting resin layer and the matte pattern layer by using the decorative sheet having the gloss adjusting resin layer and the matting pattern layer on the upper surface of the transparent acrylic resin film layer. Although it is convex, the concave surface can be visually perceived to give an embossed pattern, and a decorative sheet excellent in design can be obtained at a low cost.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a laminated structure of an embodiment of the decorative sheet of 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, and FIG. FIG. 4 is a cross-sectional view showing a laminated structure of an example of a decorative board produced using the decorative sheet of the present invention. 'Is a decorative sheet, 2 is a polyolefin resin film, 3 is a primer resin layer, 4 is a pattern printing layer, 5 is a heat-adhesive resin layer, 6 is a transparent acrylic resin film, 8 is a colored ink layer, 9 is gloss adjustment The resin layer, 10 is a matted pattern layer, 11 is an easy-adhesive layer, 12 is an adhesive layer, 13 is a substrate, and 14 is a decorative board.
[0010]
As shown in FIG. 1, the basic structure of the decorative sheet 1 of the present invention is, in order from the bottom, a polyolefin resin film 2, a primer resin layer 3, a picture printing layer 4, a heat adhesive resin layer 5, and a transparent acrylic resin. The resin film 6 is laminated, and is characterized in that a primer resin layer 3 composed of a two-component curable urethane resin layer is provided between a polyolefin resin film 2 as a base sheet and the pattern printing layer 4, and The transparent acrylic resin film 6 is strongly laminated by thermal bonding through a thermal adhesive resin layer 5 made of a vinyl chloride-acrylic resin provided on the upper surface of the pattern printing layer 4.
[0011]
The polyolefin-based resin film 2 as a base sheet layer used in the decorative sheet 1 of the present invention is a material that has strength and moderate elongation and is inexpensive. More importantly, there are no chlorine groups in the molecule. Further, by coloring, it is possible to provide a concealing property so that the print pattern of the pattern print layer 4 formed on the base sheet layer is not affected by the color of the substrate to be bonded. Examples of the coloring method include pigment mixing, foaming, and voiding treatment.
[0012]
The thickness of the polyolefin-based resin film 2 is not particularly limited, but is preferably in the range of 50 to 200 μm from the viewpoint of post-processability such as V-cut and lapping, material cost, and the like. In order to improve the adhesion between the two surfaces of the film and the printing ink or primer resin layer, it is preferable that the surface wettability index is corona-treated to 40 dynes or more, and the weather resistance is improved by adding an ultraviolet absorber, a light stabilizer or the like. Those taking into consideration are also preferably used.
[0013]
The acrylic resin film 6 as the surface protective layer is a transparent film used for protecting the printing layer. The most important thing is that no chlorine group is contained in the molecule. It also has excellent physical properties such as weather resistance and stain resistance, and is suitable for embossing. The acrylic resin used as the acrylic resin film is composed of acrylic acid (including methacrylic acid) and other monomers such as acrylic acid and styrene obtained by polymerizing acrylic acid ester, acrylamide, and acrylonitrile. And an acrylic copolymer resin. The thickness of the transparent acrylic resin film 6 is preferably 25 to 50 μm in view of weather resistance, cost, etc. of the laminated composite sheet.
[0014]
A primer resin layer 3 for preventing deterioration of weather resistance is provided on the upper surface of the polyolefin-based resin film 2. The primer resin layer 3 is excellent in adhesion to the polyolefin resin film 2 and the pattern printing layer 4 and has a function of preventing deterioration of the weather resistance of the polyolefin resin film 2 due to the ink vehicle used in the pattern printing layer 4. A liquid curable urethane resin is most preferably used, and the thickness of the primer layer 3 is preferably 5 μm or more. That is, when it is less than 5 μm, it is impossible to prevent the weather resistance deterioration. However, if it exceeds 10 μm, it is difficult to form by a single coating operation with a gravure coat, and it cannot be performed in the same process as the formation of the picture printing layer, so that the productivity is lowered and the cost is increased.
[0015]
The pattern printing layer 4 has, for example, a wood grain pattern, a stone pattern, a cloth pattern, a surface pattern of natural leather, an abstract pattern, etc., and an ink vehicle for providing the arbitrary pattern. Non-curable resins such as beacrylic resins, chlorinated polypropylene resins, and polypropylene-modified urethane resins are used, and are formed by gravure printing.
[0016]
The heat-adhesive resin layer 5 is provided between the transparent acrylic resin film 6 and the picture printing layer 4 so as to improve the adhesion between them. The transparent acrylic resin film 6 and the picture printing layer 3 are provided. Heat is applied to both films of the polyolefin resin film 2 provided with a laminate and heat fusion lamination is performed. When the pattern printing layer is partially provided instead of the entire surface, or when the ink constituting the pattern printing layer 4 is not suitable for thermal bonding with the transparent acrylic resin film 6 as the surface protective layer, the pattern printing layer 4 What is necessary is just to set it as the structure which provided the heat bondable resin layer 5 on the upper surface.
The thermal adhesive resin layer 5 is a transparent paint or printing ink such as a vinyl chloride-acrylic resin or a polypropylene-modified urethane resin, and can be provided at the same time as printing with the same gravure printing machine. 1 to 3 μm is preferable.
[0017]
Furthermore, as shown in FIG. 2 as a decorative sheet 1 ′ having another configuration of the present invention, the embossed concave portion provided on the surface of the transparent acrylic resin film 6 is filled with the colored ink 8, and thereafter the gloss adjusting resin. There is a configuration in which the layer 9 is provided, and the design effect of the decorative sheet is further enhanced by filling the concave portions of the concavo-convex pattern provided on the surface with colored ink by wiping.
[0018]
In the embossing, the polyolefin resin film 2 and the transparent acrylic resin film 6 are heat-sealed through heat rolls that are pressed against each other while being superposed to produce a single composite sheet. By applying pressure while heating, the transparent acrylic resin film 6 is heat-sealed to the pattern printing layer 3 of the polyolefin resin film 2 via the heat-adhesive resin layer 5 to produce a single decorative sheet. If a conduit embossing roll is used as a doubling heat roll, doubling and embossing can be performed simultaneously. These doubling and embossing processes can be performed in the same apparatus as a normal polyvinyl chloride film.
[0019]
As the colored ink 8 filled in the embossed recesses of the transparent acrylic resin film 6, paint or ink is used. For example, natural resins or modified resins thereof, cellulose derivatives, polyvinyl chloride resins, acrylic resins, polyester resins, polyurethane resins, and other synthetic resins are used as vehicle constituent materials. Color pigments and constitutions in vehicles A paint or ink obtained by adding a pigment, a plasticizer, or the like is used. As the vehicle used, a two-component curable urethane resin is preferably used. As the wiping method, any of conventionally used wiping methods such as a doctor blade method and a roll coating method may be used.
[0020]
The gloss-adjusting resin layer 9 may be colorless and transparent, or may be colored and transparent, and may be further matte and transparent, and is provided to adjust the glossiness of the decorative sheet surface. There is also a role of surface protection. The gloss adjusting layer 9 is formed by applying a paint using an appropriate vehicle. The vehicle includes 1 of thermosetting resin such as phenol resin, unsaturated polyester resin, epoxy resin, polyurethane resin, acrylic resin. A seed or two or more kinds of mixed resins can be used. The paint forming the gloss adjusting resin layer 9 is usually provided with a desired gloss by dispersing an appropriate amount of a matting agent. Examples of the matting agent include mica, silica, alumina, calcium carbonate, silica sand, and shirasu balloon. Is used. As a method for applying the paint, a method such as gravure coating, roll coating, air knife coating, or the like is used.
[0021]
Furthermore, as shown in FIG. 3, a decorative sheet 1 ″ having another configuration according to the present invention has a configuration in which a gloss adjusting resin layer 9 and a matte pattern layer 10 are formed on the surface of the transparent acrylic resin film 6. There is. The transparent acrylic resin film 6 is actually a convex surface, but a matte pattern layer 10 is provided so that the concave surface is visually felt to give an embossed pattern, and the design effect of the decorative sheet is enhanced. An embossing and wiping process is not required, and a decorative sheet excellent in design can be obtained at low cost.
[0022]
Next, as shown in FIG. 4, the decorative board 14 manufactured using the decorative sheet 1 ′ of the present invention will be described. The decorative board 14 is provided with an easy-adhesive resin layer 11 on the back surface of the polyolefin-based resin film 2 of the decorative sheet 1 'described in the other embodiments, that is, on the side on which the pattern printing layer 4 is not provided. In this structure, the substrate 13 is bonded and laminated through the agent layer 12.
[0023]
The easy-adhesive resin layer 11 is formed by using a gravure printing method or the like to a thickness of about 1 micron using an ink made of a chlorinated polypropylene-modified urethane-based two-component curable resin. Adhesive strength can be obtained sufficiently when laminating to a plywood or the like with an emulsion adhesive. The resulting decorative board is excellent in physical properties such as abrasion resistance, solvent resistance, weather resistance, chemical resistance, etc., so it can be used for building interior materials such as indoor doors and furniture, and has a V-cut groove on the plywood. It can also be used for forming and bending, and for wrapping applications such as deformed wood and deformed products.
[0024]
【Example】
Example 1
Using a colored polyolefin resin film (made by Riken Vinyl, OW-D) with a thickness of 100 μm, and using a primer made of two-component curable urethane resin by gravure printing on the corona-treated surface of the colored polyolefin resin film The layer is provided with a thickness of 6 μm, and a solid printing layer and a wood grain pattern printing layer with a salt vinyl acetate-acrylic resin ink, and a heat-adhesive resin layer with a salt vinyl acetate-acrylic medium are formed thereon with a thickness of 2 μm. A print sheet with a wood grain pattern was obtained by gravure printing. Next, a transparent acrylic resin film having a thickness of 50 μm (manufactured by Mitsubishi Rayon, acrylprene HBS-001) and the heat-adhesive resin layer surface of the printed colored polyolefin resin film were overlapped, and a heating temperature of 120 ° C. and a speed of 20 m / A doubling decorative sheet was produced by thermal lamination under the conditions of min and nip pressure of 20 kg / cm ² .
[0025]
Example 2
Under the heat laminating conditions of Example 1, the printed surface of the colored polyolefin-based resin film and the transparent acrylic resin film are pressure-bonded between an embossing roll and a silicone rubber roll and heat-laminated to form an embossed recess. A decorative sheet was prepared. Furthermore, after applying the two-component curable urethane-based colored ink on the surface of the transparent acrylic resin film having a concave portion formed by the embossing by a roll coating method, it adheres to a portion other than the concave portion with a doctor blade. The colored ink was removed, and the embossed recess formed on the surface of the laminated sheet was filled with the colored ink and solidified. Further, a two-component curable urethane-based gloss adjusting coating was coated on the sheet with a gravure roll having a plate depth of 60 μm to produce a high-design, high-workability doubling wiping decorative sheet.
[0026]
【The invention's effect】
As described above, in the present invention, the transparent acrylic resin film is laminated as the surface protective layer on the surface of the polyolefin resin film as the base substrate layer, so that the resin does not contain chlorine atoms. Therefore, since the generation of hydrogen chloride, etc. in the gas generated during the incineration process is extremely small, there are no problems such as polluting the environment, and it is possible to use the incineration means as a waste material processing means. Play.
[0027]
As the primer resin layer, a two-component curable urethane resin layer is provided with a thickness of 5 μm or more, so that the deterioration of the weather resistance of the polyolefin resin film is less likely to occur, and the vinyl chloride vinyl chloride is used as a thermal adhesive resin layer on the pattern printing layer. -Since the acrylic resin layer is provided, the transparent acrylic resin film can be easily laminated by thermal bonding.
[0028]
In addition, since the base sheet is a polyolefin-based resin film, the laminated decorative sheet is laminated with a transparent acrylic resin film, which is moderately flexible and inexpensive, and is suitable for secondary processing such as lapping or V-cut processing. A decorative sheet with a suitable adhesive layer is provided on the lower surface of the polyolefin resin film, so that it can be applied to substrates such as plywood with a general-purpose adhesive such as a polyvinyl acetate emulsion type. Can be easily pasted together.
[0029]
In addition, since the embossed recesses are formed on the upper surface of the transparent acrylic resin film and the embossed recesses are colored by wiping, a decorative sheet having excellent design properties can be obtained by combining with a printed pattern.
[0030]
Furthermore, since the surface pattern is visually felt as if it is a recess without embossing and wiping, an embossed pattern can be obtained at a low cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a laminated structure of an example of a decorative sheet according to the present invention.
FIG. 2 is a cross-sectional view showing a laminated structure of another example of the decorative sheet of the present invention.
FIG. 3 is a cross-sectional view showing a laminated structure of another example of the decorative sheet of the present invention.
FIG. 4 is a cross-sectional view showing a laminated structure of an example of a decorative board produced using the decorative sheet of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1 'decorative sheet 2 Polyolefin-type resin film 3 Primer resin layer 4 Picture printing layer 5 Thermal adhesive resin layer 6 Transparent acrylic resin film 7 Embossing recessed part 8 Colored ink layer 9 Gloss adjustment resin layer 10 Matte design layer 11 Easy adhesion Resin layer 12 Adhesive layer 13 Substrate 14 Decorative plate

Claims (6)

In a decorative sheet comprising a polyolefin resin film layer, a primer resin layer, a pattern printing layer, a thermal adhesive resin layer, and a transparent acrylic resin layer in order from the bottom, the primer resin layer is a two-component curable urethane resin The heat-adhesive resin layer is made of a vinyl chloride-acrylic resin, and an easily-adhesive resin layer is formed on the opposite surface of the polyolefin resin film layer to the primer resin layer lamination surface. A decorative sheet. The decorative sheet according to claim 1, wherein the easily adhesive resin layer is made of a urethane-based two-component curable resin .   The decorative sheet according to any one of claims 1 and 2, wherein the two-component curable urethane resin layer constituting the primer resin layer has a thickness of 5 µm or more.   The embossing is performed on the upper surface of the transparent acrylic resin film layer to form an embossed recess, and the embossed recess is filled with colored ink by wiping, and then a gloss adjusting resin layer is provided. The decorative sheet according to any one of Items 1 to 3.   The decorative sheet according to any one of claims 1 to 3, wherein a gloss adjusting resin layer and a matte pattern layer are provided on an upper surface of the transparent acrylic resin film layer. A makeup, wherein a substrate is adhered and laminated to the surface of the easy-adhesive resin layer of the decorative sheet according to any one of claims 1 to 5 via an adhesive layer made of an ethylene-vinyl acetate emulsion adhesive. Board .

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