JPH0554393B2 - - 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 printed pattern portion containing a liquid repellent completely repels the top coat applied afterwards, and improves visual and tactile properties. The present invention relates to a method for manufacturing a decorative sheet that gives an uneven feel (roughness) to the surface.

<Conventional technology and its problems> Research on so-called repellency patterns using liquid repellents has been conducted for a long time, as described below, and looking at the background, it has been found that sufficient repellency effects cannot be obtained with the addition of liquid repellents alone. Since then, attempts have been made to add absorbents and matting agents to improve the effectiveness.

However, since all of these proposals are characterized by applying the top coat over the entire surface, the repelled top coat builds up in a convex shape around the printed pattern containing the liquid repellent, for example, creating a conduit in a wood grain pattern. It was found that the wood gave an unnatural appearance and damaged the wood feel.

In other words, for this type of decorative sheet, (1) using printing ink with a repellent added, the printing process is combined with a regular topcoat, and unevenness is formed on the topcoat surface while the printed pattern is perfectly synchronized; Printed plywood with an uneven pattern that makes the printed pattern appear three-dimensional (Utility Model Publication No. 47-16629).

(2) A printing layer is formed using an ink composition containing a liquid-repellent substance on the base sheet, and a printing layer using a normal ink composition is formed on the other part of the base sheet to form a desired pattern. A decorative sheet (Japanese Patent Publication No. 52-2641) with a printed pattern and a transparent surface protective layer made of a top coat containing the same liquid-repellent substance as above.

(3) Print as necessary on the surface-treated substrate, and also print with ink containing oil components and extender pigments with high oil absorption, and when top coated, the paint is diffused and absorbed from the ink-printed surface. A method for manufacturing decorative plywood in which depressions are formed (Special Publication No. 52-21045).

(4) After forming a woodgrain pattern paper by performing blur printing on the base paper using ordinary printing ink and performing conduit printing using printing ink mixed with a liquid repellent and a matting agent, A method for manufacturing a decorative board with a wood grain pattern and uneven surface, which involves coating a surface resin on a wood grain pattern paper, drying it, and adhering the wood grain pattern paper to a base material (Japanese Patent Publication No. 7915/1983).

etc. are publicly known.

However, with either of these methods, it is difficult to obtain a clear repellent effect, or the excess topcoat paint that is repelled builds up around the pattern containing the liquid repellent, especially in the case of conduit expression of wood grain patterns. The paint repelled by the conduit pattern containing the liquid repellent becomes a large bulge, giving an unnatural finish that lacks the wood feel. There were disadvantages such as the upward side being felt, and because the amount of the liquid repellent was small in the thin areas of the printed pattern, the repellency was insufficient and as a result, sharp unevenness could not be expressed.

<Means for solving the problem> According to the above method, the substances added in addition to the liquid repellent are silica, alumina, calcium carbonate, etc., which are conventionally known as ink matting agents, and the particles are generally It is small, less than 10μ, so it does not feel rough in the intended recess, and even if it is combined with the action of an absorbent, the liquid repellent added originally has an effect, so it will build up unnaturally around it. It is natural to feel that there is a problem with additives other than liquid repellents and the overall coating of the top coat, and as a result of research to solve this problem, we have arrived at the present invention.

That is, the method for producing a decorative sheet of the present invention involves printing a pattern on a base sheet using ordinary printing ink,
Next, a desired pattern is printed on top of it using ink mixed with a liquid repellent and fiber powder, and then a top coat is applied using a blank plate that does not cover only the center of the desired pattern. It is characterized by the following.

In this invention, the term "blank plate" refers to a plate on which paint or ink is not applied (does not adhere) only to the part where the cutouts are made, and here, it is the same size as the desired pattern previously printed, that is, the desired pattern. This is not a version that does not cover the entire handle, but a blank version that does not cover only the center of the desired handle.

Unlike the tweezers used in the past, when the desired pattern is a conduit in woodgrain printing, a piece of exactly the same size as the conduit is removed.
This uses a blank plate with a piece smaller than the conduit cut out so that it bites into the inner periphery of the conduit. For example, it is a blank version with a conduit groove pattern that is about 30% narrower than the conduit groove pattern.

In addition, for patterns other than wood grain, for example, in a floral tile pattern, if the desired pattern is between the joints and the floral pattern, the blank plate used is 30 mm wider than the width of the tile joints and the floral pattern. % This is a blank version with narrow strokes.

Applying a top coat using this blank plate means that the plate to which the top coat is applied is a blank plate.

The most distinctive feature of this invention is the use of a blank plate that slightly penetrates into the inner periphery of the pattern printed with ink containing a liquid repellent and fiber powder.

In each of the following examples, it is also mentioned that resin coating is performed using a blank plate. This is a method in which the entire surface of the handle is painted without being coated only in the center of the handle.

<Function> As the liquid repellent used in this invention, conventionally known liquid repellents such as silicone and wax are used.

As an additive to give a feeling of roughness,
The problem is the specific gravity, shape and size of the particles,
Preferably, the particle size is 15μ or more. Well-known hollow particles such as glass beads and glass balloons can be considered, but in consideration of ink dispersion, precipitation, and abrasiveness, softer fiber powders such as cellulose powder, wood powder, and cotton powder, which have a lower specific gravity, may be used. is valid.

In order to obtain a rough feeling, it is possible to increase the size of the particles of the conventional matting agent, but the specific gravity is large, the dispersibility is poor, precipitation phenomenon occurs more, and because of the hiding power, it becomes cloudy. The disadvantages are that the desired color of the conduit groove cannot be obtained, and because of its hardness, the doctor blade is difficult to cut during gravure printing, resulting in doctor streaks appearing on printed matter and easily damaging the doctor blade, plate, etc.

On the other hand, fiber powder has a low specific gravity, does not cloud the ink, and is soft, so the above-mentioned disadvantages are unlikely to occur, and it is of great significance as an additive for obtaining a rough texture.

However, in the present invention, mixing a normal particulate matting agent into the ink containing a liquid repellent agent does not cause the above-mentioned drawbacks, although the effect of conduit expression may be further enhanced.

Next, as a method for smoothing the repelling action and suppressing the build-up around the repellent, the painted plate, which is the greatest feature of this invention, is a blank plate that slightly enters the inner periphery of the pattern printed with liquid repellent ink. It's about using it.

Conventionally, the tweezers used are the tweezers that have been used, i.e., when the desired pattern is a conduit in woodgrain printing, a tweezers of exactly the same size as the conduit are removed (Tokuko Sho 51).
-7085, 53-331), it uses a blank plate with a piece smaller than the conduit cut out so that it bites into the inner periphery of the conduit.

As described above, this invention prints a pattern on a base sheet using ordinary printing ink, and then coats it with a known liquid repellent such as silicone or wax and a particle size of 15μ or more to give it a rough feel. , and print the desired pattern with ink mixed with fiber powder of low specific gravity, and then apply a topcoat on top of it with a blank plate that slightly digs into the inner periphery of the pattern, or in other words, removes the central part of the pattern. As a result, it is possible to obtain a decorative sheet that forms complete concave portions as desired and has roughness in the concave portions, visually and tactilely.

Although the above explanation has been made regarding the method for manufacturing a decorative sheet with a wood grain pattern, the method for manufacturing a decorative sheet of the present invention is not limited to this, and can also be applied to abstract patterns.

Note that as the base sheet, thin paper, kraft paper, resin-impregnated paper, synthetic paper, vinyl chloride sheet, etc. can be used.

Further, the fiber powder is preferably added in an amount of 10 to 30% by weight based on the ink.

<Example> Hereinafter, this invention will be explained in detail with reference to Examples.

Example 1 A desired wood grain pattern was printed on thin paper with a basis weight of 23 g/m ² using a conventional gravure printing method, and then a conduit groove pattern that matched the wood grain pattern was printed using the following blended ink.

Compound Nitrocellulose 8 parts Silicone (liquid repellent) 8 parts Wax ( ) 2 parts Pigment 12 parts Cellulose powder (fiber powder) 15 parts Silica (matting agent) 7 parts Ethyl acetate (solvent) 20 parts Toluene ( ) 20 parts Methyl alcohol (〃) 10 parts Next, in the same line, about 30% from the above conduit groove pattern
A urethane resin paint was applied at 20 g/m ² using a blank plate with a narrow conduit groove pattern and dried to obtain a decorative sheet.

The thus obtained decorative sheet has a uniform coating even in the wood grain pattern where the conduit groove pattern is crowded, and the conduit groove pattern has an extremely woody feel with concavities and roughness even when the texture has disappeared. It was hot.

Example ² Acrylic urethane resin 15 parts silicone (liquid repellent) 3 parts wax (〃) 3 parts pigment 15 parts wood powder (fiber powder) 25 parts isocyanate A conduit groove pattern was printed using an ink containing 10 parts of resin, 20 parts of ethyl acetate (solvent), and 15 parts of toluene.

Next, in the same line as in Example 1, about 20
An amino alkyd resin paint was applied at 15 g/m ² using a narrow printing plate and dried to obtain the desired decorative sheet.

Example 3 An abstract pattern with a floral pattern on a tile base was printed on thin paper with a basis weight of 23 g/m ² using the usual gravure printing method, and the floral pattern was printed at the joints of the tile base using the blended ink of Example 1. After printing the bordered area,
Apply 20% full gloss urethane resin paint with a blank plate that is about 30% narrower than the width of the tile joint and the floral pattern area.
When applied and ^dried , a decorative sheet was obtained that resembled the real thing in terms of appearance and feel, with differences between the flat part of the tile, the joints, and the concave parts of the floral pattern lines.

<Effects of the Invention> As described above, it has been confirmed that according to the present invention, it is possible to obtain a decorative sheet in which the printed pattern portion containing a liquid repellent completely repels the top coat applied afterwards, and also visually and tactually gives an uneven feeling. Ta.

Claims (1)

[Claims] 1 A pattern is printed on the base sheet using ordinary printing ink, and then a desired pattern is printed on top of that using ink mixed with a liquid repellent and fiber powder, and then the desired pattern is printed on top of that using ink mixed with a liquid repellent and fiber powder. A method for manufacturing a decorative sheet characterized by applying a top coat using a blank plate that does not cover only the central part.