JPS61263675A - Production of decorative sheet - Google Patents

Abstract

PURPOSE:To obtain the titled decorative sheet having a rugged look by printing a pattern on a substrate sheet with ordinary printing ink, printing a pattern thereon with use of ink mixed with a liq.-repellent agent and fibrous powder and applying an overcoat with a draft plate excluding the central part of the pattern placed on the pattern. CONSTITUTION:A pattern is printed on a substrate sheet with ordinary printing ink, then a desired pattern is printed with ink mixed with a liq.-repellent agent such as silicone and fibrous powder for producing a rough feeling having >=15mu grain diameter and an overcoat is applied with a draft plate intruding slightly into the inner periphery of the pattern or excluding the central part of the pattern. Consequently, a complete recess can be formed as desired, the recess has a rough feel and a visually and sensitively rugged decorative sheet can be obtained. To the ink, 10-30wt% fibrous powder is preferably added.

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 that is subsequently applied, and improves visual and tactile properties. The present invention relates to a method for producing a decorative sheet that exhibits a rough texture (roughness).

<Conventional technology and its problems> Research on so-called repellent patterns using liquid repellents has been conducted for a long time, as described below.
A sufficient repelling effect cannot be obtained by adding only a liquid repellent, and attempts have been made to add absorbents and matting agents to further enhance the effect.

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 wood gave an unnatural appearance and damaged the wood texture.

In other words, for this type of decorative sheet, (1) using printing ink with a repellent added, printing processing is combined with normal topcoating, and unevenness is formed on the topcoat surface while the printed pattern is completely synchronized; Printed plywood with an uneven pattern that makes the printed pattern appear three-dimensional (Jikko Sho 47-1)
No. 6629).

(2) A printing layer is formed on the base sheet using an ink composition containing a liquid repellent substance, and on the other hand, a printing layer using a normal ink composition is formed on a portion other than the printing layer to form a desired pattern. A decorative sheet (Japanese Patent Publication No. 52-2641) provided with a printed pattern and further provided with 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 print with ink containing oil components and extender pigments with high oil absorption, and when top coated, the paint will be diffused and absorbed from the printed surface of the ink. A method for producing decorative plywood in which depressions are formed (Japanese Patent 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 producing a decorative decorative board with a wood grain pattern (Japanese Patent Publication No. 57-7915), which involves coating a surface resin on a wood grain pattern paper, drying it, and adhering the wood grain pattern paper onto a base material.

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, and the texture is not the roughness that should originally be at the bottom of the concave, but rather the bulge around the concave. In addition, since the amount of liquid repellent agent is small in the areas where the printed pattern is narrow, the repellency is insufficient, resulting in the inability to express sharp unevenness.

According to the method described above, the substances added in addition to the liquid repellent are silica, alumina, calcium carbonate, and other substances 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 is effective, so it will build up unnaturally around it. It is natural to feel this, and we focused on the problem with additives other than liquid repellents and the overall coating of the top coat.
As a result of studies to solve this problem, the present invention was developed.

That is, the method for producing a decorative sheet of this invention involves printing a pattern on a base sheet using normal printing ink, and then printing a desired pattern on top of the pattern using ink mixed with a liquid repellent and fiber powder. After that, a blank plate excluding the central part of the handle is placed on top of the handle and a top coat is applied.

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

The specific gravity, shape, and size of the particles are important factors for the additive to give a feeling of roughness, but those having a particle diameter of 15 μm or more are preferable. Well-known hollow particles such as glass peas and glass balloons can be considered, but in consideration of ink dispersion, precipitation, and abrasiveness, soft fiber powders such as cellulose powder, wood flour, 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 conventional matting agents, but the specific gravity is large, resulting in poor dispersibility, causing more precipitation, and because of its 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 on printed matter and easy damage to the doctor blade, plate, etc.

On the other hand, fiber powder has a low specific gravity, does not cloud the ink, is soft, and therefore does not suffer from the above-mentioned drawbacks, and is therefore 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 increased.

Next, as a method for smoothing the repelling action and suppressing the build-up around the repellent, the coated plate, which is the greatest feature of this invention, is a blank plate that slightly penetrates into the inner periphery of the pattern printed with liquid-repellent ink. The purpose is to use

Unlike the tweezers used in the past, which are exactly the same size as the conduit part (Special Publications No. 51-7085, No. 53-331), the tweezers are designed to cut into the inner periphery of the conduit part. It uses a blank version that handles objects smaller than conduits.

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 15 μm or more to give it a rough feel. , and a desired pattern is printed with ink mixed with a fiber powder of low specific gravity, and then a top coat is applied on top of it with a blank plate that slightly digs into the inner periphery of the pattern, or in other words, removes the center part of the pattern. By doing so, it is possible to obtain a decorative sheet that forms complete recesses as desired and has roughness in the recesses, 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, it is preferable to add 10 to 30% by weight of the fiber powder ink.

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

Example 1 A desired wood grain pattern was printed on a thin paper of 123 g/rd by normal gravure printing method, and then a conduit groove pattern that matched the wood grain pattern was printed using the following blended ink.

Composition 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 (/7
) 20 parts Methyl alcohol (〃) 10
Next, apply 20g of urethane resin paint on the same line using a blank plate with a conduit groove pattern that is approximately 30% narrower than the above conduit groove pattern.
/rd coating and drying 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. Met.

Example 2 Acrylic urethane resin 15 parts silicone (liquid repellent) 3 parts wax (〃 ) 3 parts pigment 15 parts main powder (fiber powder) 25 parts isocyanate resin 10 parts ethyl acetate (solvent> 20 parts toluene (II>
The conduit groove pattern was printed with 15 parts of formulated ink.

Next, in the same line as in Example 1, 15 g/amino alkyd resin paint was applied using a blank plate with a width about 20% narrower.
After applying 7Ff and drying, a desired decorative sheet was obtained.

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/7 Ff using the usual gravure printing method, and the blended ink of Example 1 was used to print the joints of the tile base and the floral pattern. After printing the bordered image area, 20 g of fully heated urethane resin paint was applied using a blanking plate with an image line that was about 30% narrower than the width of the tile joint and the floral pattern area, and after drying,
A decorative sheet was obtained in which the difference between the flat part of the tile, the joints, and the concave parts of the floral pattern line area was similar to the real thing in terms of appearance and feel.

<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] A pattern is printed on the base sheet using ordinary printing ink, and then a desired pattern is printed on top of it using ink mixed with a liquid repellent and fiber powder, and then the center part of the pattern is removed. A method for manufacturing a decorative sheet, which is characterized by placing a blank plate and applying a top coat.