JPH048237B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for manufacturing decorative sheets, in which the dark colored portions of the pattern printed after full-surface coating exhibit a complete matte appearance, and the light colored portions exhibit a completely matte appearance, and the light colored portions correspond to the printed pattern. The present invention relates to a method for producing a decorative sheet having a gradation change in gloss from a matte state to a glossy state.

<Conventional technology and its problems> Regarding the manufacturing method of decorative sheets or decorative boards with different glosses, for example, as a method to express the matte state of conduit grooves with a wood grain pattern, (1) Any method is applied to the plywood surface. After forming the desired wood grain pattern, applying a curable transparent paint on top of it and allowing it to harden or semi-cure, a conduit groove pattern is printed using a curable ink containing a matting agent to match the wood grain pattern. , a method for manufacturing decorative plywood with a hardwood decorative surface by heating and curing it (Special Publication No. 1973-
No. 25323).

(2) Print a wood grain pattern on the base material that has been properly prepared,
A method for producing a decorative material with a wood grain pattern, in which a transparent synthetic resin paint is printed and coated on top of it using a gravure plate with conduit grooves made convexly and other parts concave, in synchronization with the wood grain pattern, and this is dried to finish. (Special Publication No. 51-7085).

Many inventions have been proposed, including:

However, in these conventional proposals, taking the above-mentioned wood grain pattern as an example, the matte part is limited to the conduit groove part, and as a result, "the conduit groove part is
As the saying goes, ``Matte, other parts glossy.''
It is a so-called uniform expression that is divided into two contradictory gloss states, and subtle changes in gloss in areas other than the conduit grooves are not expressed.In other words, it cannot escape from the artificial expression method, and is I felt that the reproduction of the realistic wood texture sought by the proposer had not been sufficiently achieved.

<Means to solve the problem> Conventionally, woodgrain patterns have been printed using two methods: (A) Bokeh printing (shading of wood grain patterns combined) and bone printing. (A version that expresses particularly dark parts of the wood grain pattern, such as conduits and striped patterns)
and, if necessary, a conduit plate (particularly a plate that expresses only the conduit pattern, for example, a plate printed with ink containing a matting agent in Tokko Sho 49-25323, and a plate printed with ink containing a matting agent,
No. 51-7085 describes a method of separating into (B) a yellow plate (based on yellow) using the three primary colors of color (light). Red version (printed with magenta-based ink), Indigo version (printed with cyan-based ink)
There is a method of decomposition into two, and it is known that in ordinary wood grain printing that ignores changes in gloss, the so-called three primary color separation of (B) can produce a more realistic wood grain expression than (A).

If we reconsider the conventional method of making decorative materials with different glosses, the part where the normal wood grain pattern is printed is
There seems to be no problem using either (A) or (B) above, but the important change in luster is desired only in the conduit groove pattern, and the conduit version of (A) or its blank version is used. This is the biggest reason why it remains a uniform expression.

In view of the above points, the present inventor proposed that, in a printing method that utilizes three primary color separations, which are said to be able to express a more realistic wood grain pattern, for example, when expressing conduit grooves in a matte color, Rather than using plates to find differences in gloss, we focused on the indigo plate, which has the conduit groove pattern being the darkest, and expresses the density of other wood grain patterns and their fogged areas in gradations. After printing the yellow and red versions, a glossy coating is applied to the entire surface before printing with the indigo version, which is normally done, and then a matting agent is mixed into the ink used for the indigo version. If coloring and matting are done at the same time using an indigo printing plate, the desired color of the entire wood grain pattern will be obtained, the conduit groove will lose its luster the most, and the other wood grain patterns and their fogged areas will change in gloss in gradations. We have discovered that it can bring out the following.

Thereby, there is no need to create a conduit plate, and it is possible to eliminate the uniform expression of differences in gloss caused by using such a conduit plate.

That is, in the method for producing a decorative sheet of the present invention, in printing using yellow, red, and indigo plates obtained by separation of the three primary colors, solid printing and other treatments are performed as necessary on the base sheet, and then It is characterized by printing the yellow and red versions using regular ink, then applying glossy paint over the entire surface, and then printing the indigo version using matte ink.

<Function> What should be noted in the method of the present invention is that in the conventional method using a conduit plate or its blank plate, the desired color of the wood grain pattern has already appeared at the time of painting the entire surface. In the method of the present invention, which uses an indigo printing plate, the color of the desired wood grain pattern is considerably different from the color of the desired wood grain pattern when the entire surface is painted, and the desired color of the wood grain pattern is obtained only after printing the indigo printing plate.

In other words, there is a conventional method in which a protective layer is coated on a printed sheet that has the desired color in advance, and then only the conduit pattern is made matte. The point of view is very different from the method of the present invention, which involves painting as a section and then coloring and matting with an indigo printing plate to obtain the desired color and strengthen the protective layer.

Furthermore, the most distinctive feature of this invention is that not only the areas where the patterns, which will be described later, should cooperate, are strongly matted, but also the gloss of other areas is subtly changed.

In other words, in order to apply matting ink using an indigo printing plate with varying fog strength on top of a glossy all-over paint layer that is completely glossy or with a slight amount of matting agent mixed in, the pattern is applied over almost the entire surface. This is because differences in gloss occur depending on the strength of the fog.

The base sheet used in this invention includes thin paper, kraft paper, resin-impregnated paper, synthetic paper, thermoplastic synthetic resin sheet, etc., which are usually used as decorative sheets by applying synthetic resin paint after printing. Appropriate.

Up to now, we have mainly talked about the conduit groove pattern, which is a wood grain pattern, as printing patterns that have a change in gloss, but there are also knots, wormy (insect-eaten marks),
Naturally, it is possible to realistically express distress marks (scars) and cracks in weathered boards called burnboard, and it can also be expected to have sufficient effects on stone patterns, brick patterns, cross patterns, and other abstract patterns.

In this invention, the ink used in the step before applying the glossy thermosetting resin paint is no different from ordinary inks. That is, the base sheet may be subjected to solid printing or other processing as necessary, and yellow and red versions may be printed using ink suitable for the base sheet.

The printing process for the next paint layer and indigo plate is the reverse of normal printing, that is, the order of the paint layer and ink layer is instead of the normal paint layer that is a protective layer on top of the ink. In order to maintain the performance of printed matter, it is preferable to use a thermosetting resin for both the paint and the ink. That is, by using a thermosetting paint such as aminoalkyd resin or urethane resin in the paint layer, and using a matte ink made of aminoalkyd or urethane as a thermosetting ink for the ink applied thereon, heat resistance and resistance are improved. It can provide properties such as solvent resistance and abrasion resistance.

Furthermore, if necessary, liquid repellents such as silicone and wax can be added to the paint layer to make it water repellent.
It is possible to improve Sellotape resistance, stain resistance, and abrasion resistance.

Further, in order to improve the adhesion between the paint layer and the matte ink, it is preferable to dry the paint layer so that the paint is in a semi-cured state, and to fully cure the matte ink by drying it sufficiently after printing.

The best matting agent to be mixed into the matting ink and, if necessary, the paint is silica, which is commonly used, and other materials that are expected to have a matting effect, such as magnesium carbonate and fiber powder, are also effective.

Furthermore, due to the nature of decorative sheets in the industry, the finished color is not constant and can be finished in various colors depending on the user's preference, so the ink colors used for yellow, red, and indigo versions are yellow, magenta, and cyan. It is not outside the scope of this invention to use complementary colors (add other colors) depending on the finished color, without being particular about the primary colors of the There is no problem in printing the pattern in two versions, the indigo version and the indigo version.

<Examples> The present invention will be described in detail below using examples.

Example 1 A manuscript with an oak plate with a pronounced conduit groove pattern was separated into three primary colors using a camera, and a yellow plate, a red plate, and an indigo plate with desired oak patterns were made through a normal photoengraving process.

Next, polyolefin synthetic paper was treated with a sealer using a rotogravure press, and after solid printing, patterns were printed using the yellow and red plates mentioned above as usual.

On top of that, apply 3 urethane paints of the following formulation 1 on the entire surface.
g/m ² was coated, dried at 100°C for 2 seconds, and finally an indigo plate was printed with the ink of formulation 2, followed by dry curing at 140°C for 10 seconds.

Blend 1 Acrylic polyol resin 30 parts Silicone 3 parts Wax 3 parts Isocyanate resin 10 parts Ethyl acetate 27 parts Toluene 27 parts 100 parts Blend 2 Acrylic polyol resin 25 parts Silicone 3 parts Wax 3 parts Pigment 15 parts Silica 5 parts Magnesium carbonate 5 parts Isocyanate resin 10 parts Ethyl acetate 20 parts Toluene 14 parts 100 parts The thus obtained decorative sheet has a completely matte conduit pattern, and the other parts express a change in gloss similar to dust on the wood surface. , reproduces a wood grain pattern with a calm and calm feel.

Example 2 In the same manner as in Example 1, a printing plate was made using a plate made of weathered cedar wood with knots and cracks.

After solid printing on tissue paper, then sequentially printing yellow and red versions, apply 5g/ ^m2 of aminoalkyd paint of the following formulation 3 to the entire surface, dry at 80℃ for 2 seconds, and then finish. An indigo plate was printed with the ink of formulation 2 used in Example 1 and dried and cured at 135°C for 10 seconds.

Formulation 3 Amino alkyd resin 40 parts Silicone 2 parts Wax 3 parts Silica 2 parts Para-toluenesulfonic acid 5 parts Isopropyl alcohol 18 parts Toluene 20 parts Methanol 10 parts 100 parts The thus obtained decorative sheet has no knots or fine cracks on the rough surface of the wood. In addition, the large cracks and withered winter grains have a strong matte finish, and the overall gloss has been reproduced to reflect the weathered condition of burnboard.

Example 3 In the same manner as in Example 1, a brick pattern having uneven shadow areas was printed on the joints and the skin surface of the brick itself.

After solid printing on kraft paper and printing a red version, apply 8g/urethane resin paint of formulation 1 to the entire surface.
m ² was coated and dried at 80°C for 2 seconds, then an indigo plate was printed with ink of formulation 4 below, and dried and cured at 140°C for 10 seconds.

Blend 4 Amino alkyd resin 40 parts Silicone 2 parts Varnish 3 parts Pigment 14 parts Silica 8 parts Para-toluenesulfonic acid 5 parts Isopropyl alcohol 10 parts Ethyl acetate 10 parts Methanol 8 parts 100 parts The thus obtained decorative sheet was applied to the skin surface of the brick. The shadow areas that appear in the small holes and joints are strongly matte, fully expressing the three-dimensional effect, and the changes in gloss in other areas are also subtly reproduced.

Example 4 An arabesque embossed pattern was printed in the same manner as in Example 1.

Print a yellow plate and a red plate sequentially on an opalescent vinyl chloride sheet, and then apply the following paint composition 5 on the entire surface at 3 g/m ²
It was coated and dried at 50°C for 2 seconds, and finally an indigo plate was printed with the ink of formulation 6 and dried and cured at 50°C for 10 seconds.

Blend 5 Vinyl chloride resin 15 parts Acrylic polyol resin 15 parts Wax 3 parts Colorant 5 parts Isocyanate resin 10 parts Ethyl acetate 25 parts Toluene 28 parts 100 parts Blend 6 Vinyl chloride resin 15 parts Acrylic polyol resin 15 parts Wax 2 parts Isocyanate resin 10 Parts Fiber powder 5 parts Silica 5 parts Ethyl acetate 24 parts Toluene 24 parts 100 parts The thus obtained decorative sheet reproduces an arabesque pattern with a three-dimensional effect and calmness, and is solvent resistant, so it can be used as wallpaper. Ta.

Claims (1)

[Claims] 1. In printing using yellow, red, and indigo plates obtained by separation of the three primary colors, solid printing and other treatments are performed as necessary on the base sheet, and then the yellow and red plates are printed with regular ink. After that, a glossy thermosetting resin paint is applied over the entire surface, and then an indigo printing plate is printed with a matte thermosetting resin ink.