JPH058130Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a synthetic resin decorative sheet used as a surface material for furniture, cabinets such as televisions and stereos, office equipment, or wall panels.

[Prior Art] For example, in a conventional wood grain decorative sheet having a wood grain pattern on the surface, the pattern such as a conduit formed by an embossed pattern does not synchronize well with the wood surface or color change pattern, resulting in a lack of depth. There was a problem.

[Problems to be solved by the invention] In view of the above points, the present invention utilizes both the front and back sides of a transparent or translucent synthetic resin base sheet,
The purpose of the present invention is to provide a synthetic resin decorative sheet having an embossed pattern of wood grain, stone, leather, or an abstract pattern, which is deep and in good synchronization with the embossed pattern and patterns such as color changes.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the synthetic resin decorative sheet of the present invention has a transparent or translucent synthetic resin base material, as shown in the drawings corresponding to the examples. A surface pattern 2-1 is printed on the front side of the sheet 1 using ink containing a polymerization inhibitor and an oil-repellent material, and a back pattern 3 is printed on the back side of the base sheet 1, and the back surface An opaque concealing layer 4 is formed on the entire back side including the pattern 3, and the surface pattern 2 is
By forming a coating layer 2-2 of an ultraviolet curable resin on the -1 side and curing it by irradiating it with ultraviolet rays, a concave pattern 2-2 along the surface pattern 2-1 is formed.
It is characterized by the formation of 3.

Of course, a colored sheet can be used as the transparent or translucent base sheet.

[Function] According to the synthetic resin decorative sheet of the present invention, on the surface side of the base sheet 1, the portion of the coating layer 2-2 in contact with the surface pattern 2-1 is repelled by the oil-repellent material. It becomes depressed due to being exposed to water. The recess formed by this oil-repellent material is
As shown in FIG. 3, the material of the coating layer 2-2 remains on the surface and periphery of the surface pattern 2-1, which lacks sharpness and is insufficient. When such a coating layer 2-2 is irradiated with ultraviolet rays, most of the coating layer 2-2 is cured by ultraviolet rays, but polymerization is inhibited in the portion corresponding to the surface pattern 2-1 due to the transfer of the polymerization inhibitor. The remaining part is pulled outward due to curing shrinkage caused by the surrounding ultraviolet rays to form a complete recess 2-3.

In addition, since the back surface pattern 3 was printed on the back surface of the transparent or translucent base material sheet 1 on which the surface pattern 2-1 was formed on both the front and back sides of the base sheet 1, both patterns were well synchronized, and both patterns In between, a fairly thick single transparent or semi-transparent layer made of the base sheet 1 is interposed to hide the back side, so there is a difference in the thickness direction between the positions of the front and back patterns, creating a deep expression. In the case of a wood grain pattern or a leather pattern, it is possible to obtain a texture that is even closer to natural than conventional products. Further, by using a colored transparent or colored semi-transparent sheet as the base sheet 1, a painted feeling is produced.

[Example] The present invention will be described in detail below based on the example shown in the drawings.

FIG. 4 is a cross-sectional view of a decorative sheet according to an embodiment of the present invention, and FIGS. 1 to 3 are cross-sectional views showing the manufacturing process of the decorative sheet.

As shown in FIG. 4, the decorative sheet A according to this embodiment is formed on the front side 2 of a transparent or translucent colored or colorless thermoplastic synthetic resin base sheet 1 having a predetermined thickness of about 0.2 mm. An embossed surface pattern 2-1 of wood grain, stone, leather, and abstract patterns is formed, and a back pattern 3 is printed directly on the back side using a wood grain plate and a color-changing plate, and the entire back side is covered with concealing properties. In case of solid printing with strong opaque ink or insufficient hiding power, the opaque hiding layer 4 is formed by laminating opaque colored thermoplastic sheets. Furthermore, it is even more effective to add shine to the back surface pattern 3 with pearl or metallic ink.

The surface pattern 2-1 has the following shape and pattern. That is, on the surface of the base sheet 1 shown in FIG. 1, hydroquinone, benzothiazole, diethylhydroxyamine, and
An ink containing a polymerization inhibitor such as butylpyrocatechol, sulfoxide, cyclic amide, or copper naphthenate, and an oil-repellent material such as fluorine-based resin can be used to create wood grain, stone, leather, and abstract patterns as shown in Figure 2. A surface pattern 2-1 corresponding to a concave pattern is formed by printing, and oligourethane acrylate, oligourethane acrylate, etc. A coating layer 2-2 is formed using an ultraviolet curable resin such as epoxy acrylate, unsaturated polyester, oligoacrylate, silicone acrylate, acrylate monomer, and styrene monomer. Then, the portion of the coating layer 2-2 in contact with the surface pattern 2-1 is repelled by the oil-repellent material and becomes depressed. The recesses formed by this oil-repellent material have a surface pattern 2 as shown in FIG.
The material of the coating layer 2-2 remains on the surface and periphery of the coating layer 2-1, which lacks sharpness and is insufficient. When such a coating layer 2-2 is irradiated with ultraviolet rays, most of the coating layer 2-2 is cured by ultraviolet rays, but polymerization is inhibited in the portion corresponding to the surface pattern 2-1 due to the transfer of the polymerization inhibitor. The remaining part is pulled outward due to curing shrinkage caused by the surrounding ultraviolet curing to form a complete recess. After this ultraviolet curing, the uncured portions are cured by heating at 120°C to 150°C for 20 to 60 seconds, and the stickiness is removed. Obtain sheet A.

The amount of fluororesin as an oil-repellent material contained in the ink for printing the surface pattern 2-1 is approximately 12% to 20% based on the vehicle material of the ink. If more than this is added, the ink tends to bubble, and the surface pattern 2-1 may become a series of dots instead of lines, and the luster may appear to disappear. Therefore, if it is desired to make the recess 2-3 a dot, it is possible to intentionally create a visual three-dimensional effect by increasing the amount of fluororesin mixed.

The appropriate amount of polymerization inhibitor to be included in the ink is 5% to 25%; if it is less than this, the recesses 2-3 cannot be formed, and if it is more than this, the uncured portions in the ultraviolet curable resin coating layer 2-2 As a result, stickiness tends to occur on the top surface of the sheet. Furthermore, if a thermosetting synthetic resin material selected from epoxy, polyester, melamine, polyurethane, phenol, and urea systems is used as the vehicle material for the ink, physical properties such as solvent resistance can be improved; If the paint containing the ultraviolet curable resin is not applied soon after printing the pattern 2-1, the curing will be completed and the effect of the polymerization inhibitor will disappear. Therefore, a surface pattern is printed with an ink that uses a thermoplastic resin as the vehicle material to produce a product decorative sheet A, and after pasting this onto a base such as furniture, the above-mentioned thermosetting synthetic resin is applied to the vehicle. The surface should be painted with the paint used as the material.

According to the above-described decorative sheet A according to the embodiment, a non-sticky embossed surface pattern 2-1 having sharp recesses 2-3 is formed, and the surface pattern 2-1 and the back surface pattern 3 are formed in a predetermined manner. The transparent or translucent base sheet 1 is formed with a difference in thickness on the front and back sides, giving it a three-dimensional depth, and since both are printed patterns, they synchronize well, making it possible to create delicate and delicate expressions. be.

[Effect of the invention] As explained above, according to the decorative sheet of the invention, the coating layer 2 is formed on the surface side 2 of the base sheet 1.
The portion of -2 in contact with the surface pattern 2-1 is recessed by being repelled by the oil-repellent material.
The recess formed by this oil-repellent material is the third
As shown in the figure, the material of the coating layer 2-2 remains on the surface and periphery of the surface pattern 2-1, resulting in insufficient sharpness. When such a coating layer 2-2 is irradiated with ultraviolet rays, most of the coating layer 2-2 is cured by ultraviolet rays, but polymerization is inhibited in the portion corresponding to the surface pattern 2-1 due to the transfer of the polymerization inhibitor. rest,
Based on the curing shrinkage caused by the surrounding ultraviolet curing, it is pulled outward to form a complete recess 2-3.

In this way, the printed surface pattern 2-1, which can be expressed in minute detail, and the embossed concave portions 2-3 are completely synchronized, making it possible to create a surface in which delicate and sharp embossing and printing are perfectly synchronized.

In addition, since the back surface pattern 3 was printed on the back surface of the transparent or translucent base material sheet 1 on which the surface pattern 2-1 was formed on both the front and back sides of the base sheet 1, both patterns were well synchronized, and both patterns In between, a fairly thick single transparent or semi-transparent layer made of the base sheet 1 is interposed to hide the back side, so there is a difference in the thickness direction between the positions of the front and back patterns, creating a deep expression. In the case of woodgrain or leather patterns, it was possible to obtain a texture that was even closer to natural than with conventional products.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views showing the manufacturing process of a decorative sheet according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of the decorative sheet according to an embodiment of the present invention. A... Decorative sheet, 1... Base sheet, 2-1
... Surface pattern, 2-2 ... Coating layer, 2-3 ... Concave portion, 3 ... Back pattern, 4 ... Hiding layer.

Claims (1)

[Scope of utility model registration request] A surface pattern is printed on the front side of a transparent or translucent synthetic resin base sheet using ink containing a polymerization inhibitor and an oil-repellent material, and a back pattern is printed and formed on the back side of the base sheet. , by forming an opaque concealing layer on the entire back side including the back pattern, and further forming a coating layer of an ultraviolet curable resin on the surface pattern side, and curing it by irradiating it with ultraviolet rays, the surface pattern is A decorative sheet characterized by having a contoured concave pattern formed thereon.