JP2001130200A - Woodgrain pattern sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a woodgrain pattern sheet capable of reproducing the design of a natural woodgrain more real by printing or the like. SOLUTION: A woodgrain 2 expressed by halftone dots by printing or the like, a vessel pattern similarly expressed by the dots by printing or the like and/or a textured pattern 3 are disposed desirably through a transparent or translucent layer 4, and a gray level of irregular color in the natural woodgrain such as a speck (spot) existing in the natural woodgrain, a delicate luster or the like by an array of wood fibers is expressed by a moire interference effect between the pattern 2, the vessel pattern and/or the pattern 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to interior / exterior materials for buildings such as houses and stores, transportation equipment such as vehicles, ships, aircrafts, etc., exterior materials for furniture and housing equipment, home electric appliances, and paper boxes. The present invention relates to a wood-grain pattern sheet applicable to all uses in which a wood-grain design is used, such as a surface decoration material for packaging materials such as bags, trays, and the like.

[0002]

2. Description of the Related Art A wood grain pattern sheet expressing a pattern imitating a natural wood grain by printing or the like has been used for a long time in such a wide range of uses as described above. Generally, the manufacturing method is to take a photograph of a wood grain manuscript taken from natural wood and produce a printing plate of multiple colors such as yellow, red, indigo, black, etc. by color separation using a color scanner, etc. The wood grain design is reproduced by overprinting the printing inks of each color using a printing plate.

[0003] Such a grain pattern sheet is different from printing in which artificial designs such as characters, symbols, and abstract patterns are reproduced.
Extremely high tone reproducibility is required in order to express subtle color changes in natural wood grain and texture of wood grain fiber. Therefore, the wood grain pattern sheet can be printed and produced by ordinary people without much discomfort. The reproduced dots are still artificially visible.

[0004] Further, since the grain pattern in such a grain pattern sheet is represented by a very thin printing ink layer provided on a flat substrate such as paper or a plastic film, it is essentially planar. It is a natural design expression that does not fully express the three-dimensional feeling and shining feeling etc. due to the arrangement of wood grain, such as summer eyes and winter eyes with natural wood grain, and it is inferior to the natural wood grain in terms of design There was a problem.

[0005]

An object of the present invention is to solve the above-mentioned problems in the conventional wood grain pattern sheet and to provide a wood grain pattern sheet which can reproduce a natural wood grain design more realistically by printing or the like. It was made for the purpose of.

[0006]

According to the present invention, there is provided a wood grain pattern sheet having a wood grain pattern and a duct pattern and / or texture pattern on the wood grain pattern. Are made up of halftone dots, and irregular shades of grain are expressed by the moire interference effect of both.

[0007] In particular, in the wood grain pattern sheet, it is desirable to have a transparent or translucent layer between the wood grain pattern and the conduit pattern and / or texture pattern. Particularly, both the grain pattern and the conduit pattern and / or the texture pattern may be constituted by halftone dots having halftone dot intervals of 100 to 300 μm and halftone dot sizes of 10 to 300 μm. Desirably, on the other hand, an alignment angle of at least some of the halftone dots constituting the woodgrain pattern,
It is preferable that the difference between the halftone dots forming the conduit pattern and / or the texture pattern and the alignment angle of at least some of the halftone dots is 10 degrees or less.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, for example, a woodgrain pattern sheet of the present invention is formed on a base material 1 such as paper or plastic film by printing a woodgrain pattern 2 represented by halftone dots.
And a conduit pattern and / or texture pattern 3 also represented by halftone dots by printing or the like. The moiré interference effect between the grain pattern 2 and the conduit pattern and / or the texture pattern 3 causes natural moire such as spots existing in a natural grain and subtle shimmer due to the arrangement of wood fibers. A feature of the grain pattern sheet of the present invention is that irregular shades of the grain are expressed.

As described above, the conduit pattern is a pattern formed by a conduit, which is a path of water in the woody part of a natural tree, appearing on a cut surface of the wood. It means a pattern that expresses the texture of the wood appearing on the cut surface that changes depending on the angle between the cut surface and the grain direction, how to cut, the processing method, and the like. Either of these can be used alone, but if both are used in combination, a more natural wood grain design expression can be achieved, and the range of design expression by the moiré interference effect aimed at by the present invention can be expanded. The most desirable.

The grain pattern 2 and the conduit pattern and / or texture pattern 3 may be provided directly adjacent to each other, or may be provided with a transparent or translucent layer 4 interposed therebetween. Good (Fig. 2). When the substrate 1 is transparent or translucent, the grain pattern 2 may be provided on the back surface of the substrate 1 and the conduit pattern and / or texture pattern may be provided on the surface of the substrate 1 (FIG. 3). ). As described above, when the transparent or translucent layer 4 is interposed between the wood pattern 2 and the conduit pattern and / or texture pattern 3, the wood pattern 2 and the conduit pattern and / or texture pattern 3 The stripe pattern due to the moire interference effect between
Since it changes depending on the viewing angle, it is possible to more realistically express the complex feeling of movement and three-dimensional effect of natural light that the natural grain has.

The thickness of the transparent or translucent layer 4 is not particularly limited. However, if the thickness is too thin, the above-mentioned effects such as a feeling of movement of light and a three-dimensional effect cannot be obtained. Is reduced and the object of the present invention cannot be sufficiently achieved,
In general, the thickness is preferably in the range of about 1 μm to 1 mm,
Most preferably, it is in the range of about 0 μm to 300 μm.

In the wood grain pattern sheet of the present invention, the wood grain pattern 2 and the conduit pattern and / or texture pattern 3 may both be colored patterns made of colored printing ink or the like.
One or both of them may be formed into a concavo-convex pattern by embossing or embossing printing (FIG. 4). In addition, a method of filling the concave portion of the embossment with the coloring ink by a wiping method or the like, a method of raising and printing the coloring ink, and the like,
A color uneven pattern can also be used. Of course, the wood grain pattern 2 itself, or the conduit pattern and / or the texture pattern 3 itself can be expressed by a combination of two or more types selected from a color pattern, an uneven pattern, and a color uneven pattern. Also,
It is desirable that at least the grain pattern 2 is not a simple uneven pattern, but a color pattern having a color or a pattern including at least a color uneven pattern.

The printing method for providing the color pattern or the color uneven pattern by the emboss printing method may be any printing method as long as it is capable of expressing gradation by halftone dots. Specifically, for example, offset printing, gravure printing, gravure offset printing, dry offset printing, letterpress printing, screen printing, inkjet printing, electrostatic printing, electrophotography, thermal transfer printing And the like. Among them, offset printing or gravure printing is most recommended as a printing method capable of stably expressing fine halftone dots. However, in the case of the embossing printing method, the gravure printing method is desirable from the viewpoint of the amount of inlaid material.

In the case of providing an embossed concavo-convex pattern or a colored concavo-convex pattern, an embossed plate in which the concavities and convexities on the surface are represented by halftone dots is used. Specifically, it is most preferable to use an embossed plate manufactured by a corrosion plate making method by applying a gravure plate making method using halftone dots, such as a conventional gravure method or a Poschel method.

In any of the above-mentioned color patterns, uneven patterns and color uneven patterns, the halftone dot interval is 100 to 3
It is preferable that the dot size is 00 μm and the size of the halftone dot is in the range of 10 to 300 μm. If the halftone interval is too wide or too narrow, or if the halftone size is too large or too small,
This is because a clear density expression cannot be perceived because the density difference of the stripe pattern due to the moire interference effect is insufficient or the interval between the stripe patterns is too wide or too narrow.

The halftone dots forming the grain pattern 2 and the halftone dots forming the conduit pattern and / or texture pattern 3 may have the same or different halftone dot intervals. However, if two halftone dots having slightly different halftone dot intervals are superimposed at almost the same alignment angle, regular linear interference fringes may appear too strongly, which may impair the natural feeling. Therefore, it is preferable that the halftone dot intervals are the same or different so that regular linear interference fringes are not noticeable. In the latter case, it is desirable that the halftone dot interval between the two is relatively different by at least 20% or more.

The alignment angle of at least some of the halftone dots forming the wood pattern 2 and at least some of the halftone dots forming the conduit pattern and / or texture pattern 3 It is desirable that the difference from the point alignment angle be 10 degrees or less. If the angle exceeds 10 degrees, the density difference of the stripe pattern due to the moiré interference effect is small, and the interval between the stripe patterns is extremely narrow. The expression of irregular shades of wood is usually
An angle difference of 1 degree or less is sufficient. There is no particular lower limit for the angle difference. Theoretically, if the halftone dot spacing and the alignment angle of both patterns are exactly the same, the moiré interference effect should not occur, but in reality, the expansion and contraction of plate making films and practical printing plates This is because it is almost impossible that the halftone dot spacing and the alignment angle of the two are exactly the same due to the movement error of the printing press.

The grain pattern 2 and the like are usually formed by superimposing a plurality of halftone dots with a plurality of colors of printing ink or the like. The selected halftone dot has a high color density and a halftone area (halftone area ratio 25% to 7%).
(About 5%) is preferably selected based on a high ratio. For example, when the wood grain pattern 2 is separated into three colors of yellow, red, and indigo (or four colors obtained by adding ink to these colors), it generally depends on the type of wood grain manuscript, but it is generally a red or indigo version. Would be suitable. In the case of color separation into three colors of base, medium, and bone, a medium plate is generally most suitable.

[0019]

<Example 1> A urethane resin-based gravure printing ink (manufactured by Toyo Ink Mfg. Co., Ltd.) was applied to the surface of a colored polyolefin-based resin sheet (manufactured by Riken Vinyl Industry Co., Ltd., trade name "Type X") having a thickness of 70 μm. (Trade name “Lamister”), using a dot interval of 190 μm and an alignment angle of 15 μm.
The wood grain pattern is printed by gravure printing of a three-layer gravure printing with a base plate (yellowish brown) with a dot interval of 190 μm, a medium plate (reddish brown) with an alignment angle of 45 ° and a bone plate (blackish brown) with a dot interval of 145 μm and an alignment angle of 75 °. Printed. Next, a thickness of 80 μm
m transparent polyolefin resin sheet (manufactured by Riken Vinyl Industry Co., Ltd., trade name "OW Clear")
The transparent polyolefin-based resin sheet was embossed with a conduit using an embossing plate having an emboss depth of 80 μm, a dot interval of 190 μm, and an alignment angle of 45 ° on the surface of the transparent polyolefin resin sheet. Thereafter, a two-component curable urethane resin for gloss control was top-coated on the surface to a thickness of 10 μm after drying to prepare a wood-grained sheet of the present invention.

The obtained grain pattern sheet has, in addition to the grain pattern design reproduced by printing, the halftone dots of the pattern of the middle plate printed in the second color, and the halftone dots present at the edges and flat portions of the embossed conduit. Interference fringes of light are generated due to the moire interference effect, and the shading of the irregularly generated color is expressed as a design resembling the spots and shininess present in the grain of wood, and both are made of a transparent polyolefin resin By being separated via a sheet, the above-described interference fringes of light change and move depending on the viewing angle, and are expressed as a design similar to the feeling of movement of illumination in wood grain and the three-dimensional effect of fiber structure, It was a wood-grain pattern sheet full of a sense of design that expressed a natural texture that could not be expressed by a normal printing plate-making method.

Example 2 A urethane resin-based gravure printing ink (manufactured by Toyo Ink Manufacturing Co., Ltd.) was coated on the surface of a colored polyolefin-based resin sheet (manufactured by Riken Vinyl Industry Co., Ltd., trade name "Type X") having a thickness of 70 μm. Using the product name “Lamister”), the dot interval is 190 μm, the alignment angle is 1
Wood grain pattern by gravure printing of 3 plates: 5 degrees base plate (yellow brown), halftone dot spacing 190 μm, medium angle 45 degree alignment (reddish brown) and halftone dot spacing 145 μm, halftone angle 75 degree alignment (black brown) Was printed. Further, a textured pattern was printed on the wood pattern with a brown ink using a printing plate having a dot interval of 190 μm and an alignment angle of 45 °. Thereafter, a two-component curable urethane resin for gloss control was top-coated on the surface to a thickness of 10 μm after drying to prepare a wood-grained sheet of the present invention.

The obtained grain pattern sheet has a halftone dot pattern printed on the second color and a halftone dot pattern of the texture pattern printed last, in addition to the grain pattern design reproduced by printing. Interference fringes of light occur due to the moiré interference effect, and irregularly generated shades of color are expressed as designs that resemble spots and shininess present in the grain of wood. It was a wood-grained sheet full of a sense of design expressing the texture.

[0023]

As described in detail above, the wood grain pattern sheet of the present invention has a pipe pattern and / or texture pattern arranged on a wood grain pattern formed by ordinary printing or the like. The conduit pattern and / or the texture pattern are both formed by halftone dots, and the moiré interference effect of both causes intentionally to generate irregular shades of color, so that the unevenness of natural wood grain A design expression similar to a shining feeling can be achieved, and an excellent real feeling that cannot be obtained by conventional flat wood grain printing can be obtained.

In particular, since a transparent or translucent layer is interposed between the wood pattern and the conduit pattern and / or texture pattern, the density of light and shade stripes due to the above-described moiré interference effect varies depending on the viewing angle. This is a wood grain pattern sheet that changes and enables expression of the movement and three-dimensional effect of the illuminance of natural wood grain, and has a more natural wood grain design feeling.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a wood grain pattern sheet of the present invention.

FIG. 2 is a side sectional view showing an embodiment of the wood grain pattern sheet of the present invention.

FIG. 3 is a side sectional view showing an embodiment of a wood grain pattern sheet of the present invention.

FIG. 4 is a side sectional view showing an embodiment of a wood grain pattern sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Wood grain pattern 3 Conduit pattern and / or texture pattern 4 Transparent or translucent layer

 ──────────────────────────────────────────────────続 き Continued on front page F-term (reference) 2H113 AA01 AA06 BA01 BA03 BA05 BA09 CA07 CA44 CA46 EA01 EA05 4F100 AK03 AK51 AR00A AR00B AR00C AR00E AT00D BA03 BA04 BA05 BA07 BA10B BA10C BA10D GB08 GB16 GB33 GB48 GB81 HB01B YY00B YY00C

Claims (4)

[Claims] 1. A wood grain sheet having a pipe pattern and / or texture pattern on a wood grain pattern, wherein the wood grain pattern and the pipe pattern and / or texture pattern are both constituted by halftone dots, A woodgrain pattern sheet wherein irregular shades of woodgrain are expressed by a moire interference effect between the two. 2. A wood grain sheet according to claim 1, further comprising a transparent or translucent layer between said wood grain pattern and said conduit pattern and / or texture pattern. 3. The grain pattern and the conduit pattern and / or texture pattern are both formed of halftone dots having a halftone dot interval of 100 to 300 μm and a halftone dot size of 10 to 300 μm. 3. The method according to claim 1, wherein
Wood pattern sheet described in. 4. An alignment angle of at least some of the halftone dots constituting the wood grain pattern, and at least some of the halftone dots among the halftone dots constituting the conduit pattern and / or texture pattern. The grain pattern sheet according to any one of claims 1 to 3, wherein a difference from the alignment angle is 10 degrees or less.