JPS60132680A - Preparation of decorative material - Google Patents

Abstract

PURPOSE:To make the shape of a recessed part sharp and to enhance the surface physical properties of said recessed part, by applying a curable paint composition containing a water soluble synthetic resin as a binder to the printed surface provided on a base material and forming the recessed part on a water repellent printing layer. CONSTITUTION:A liquid repellent printing layer 3 is directly laminated on a base material 2 so that a part thereof is directly contacted with said base material and the remainder thereof is contacted with a usual printed layer 4. In the next step, a curable paint containing a water soluble synthetic resin as a binder is applied to the entire surface of the base material provided with both printed layers 3, 4 and the paint is repelled on the aforementioned exposed liquid repellent printed layer 3 to form recessed parts. By this method, a decorative material 5 having a protective layer 6, wherein a desired part is formed into the recessed part in synchronism with the printed layers, is obtained. As the aforementioned base material 2, paper such as bleached kraft paper, titanium paper or linter paper is used. In forming the liquid repellent printed layer 3, a composition prepared by adding a liquid repellent substance such as silicone or wax to a curable resin is used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for manufacturing a decorative material having concave portions on the surface that are in synch with a printed pattern.

(Prior art) An ink composition containing a liquid-repellent substance such as silicone is used to print on a base sheet, and a top coat containing a liquid-repellent substance such as silicone is applied on the second side to match the printed matter. Cosmetic seams 1 with concave parts are known (Special Publications 1973).
．． 2-2AllI).

However, in the above-mentioned decorative sheets, the shape of the recesses is not sharp (and the paint film swells near the poles of the recesses), and in the recesses, the base sheet is covered with an ink film containing thermoplastic resin. Since the recesses are merely covered, the surface properties of the decorative sheet in the recesses are not sufficient.

Another known method is to print with printing ink containing both a liquid repellent and a matte agent, and then apply paint to form recesses (Japanese Patent Publication No. 57-7915), but this method Since the paint does not have removability, the surface of the resulting decorative sheet has poor cellophane tape resistance (the ability to prevent the pattern from disappearing when the cellophane tape is applied and removed), which poses a practical problem. Although it is known to further apply a liquid repellent to the surface in order to improve the
In any case, the insufficient surface properties of the recesses have not been improved.

In order to compensate for the insufficiency of the surface properties of the four parts in the above-mentioned conventional technology, printing was performed using a curable ink composition containing a liquid repellent, and a thermosetting paint was applied to the entire printed surface, and the melting temperature of the paint was A method of heating at a higher temperature is also known (Japanese Patent Application Laid-open No. 1999-3-3/s 73). According to this method, since the curable ink is exposed in the concave portions, insufficient surface properties in the concave portions can be resolved, and since the paint flows during the heating process, the shape of the four parts is also sharp.

However, the method using this curable ink still has drawbacks. When a liquid repellent is added to the thermosetting paint applied to the surface, the liquid repellent in the paint and the liquid repellent in the curable ink composition blend (compatibility), resulting in insufficient paint repellency in the printed area. Therefore, cellophane tape resistance and recess sharpness cannot be satisfied at the same time. Also, the second drawback is that if you try to adjust the gloss of the surface of the final product by adding a matting agent to the thermosetting paint applied to the surface, the repellency with the printed part will be insufficient. In this method, after creating a decorative sheet using the method described above, it is necessary to further apply a paint containing a liquid repellent and a matting agent in order to improve the surface's resistance to cellophane tape and adjust the gloss. As the number increases,
A new inconvenience arises in that the recesses once formed are filled with the paint containing the liquid repellent and the matting agent. In addition, the above method requires high temperatures to form the four parts, and the paint is repelled during high-temperature heating and hardens in a short time, so if the base material itself does not have paint absorbency, the repelled parts of the paint may form in the recesses. It hardens while remaining raised near the area. For this reason, it was necessary to select a porous base material that could absorb paint.

(Objective of the Invention) Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a recessed portion with a sharp shape, no bulges on both sides of the recessed portion, improved surface properties of the recessed portion, and surface resistance. To provide a method for producing a decorative material that has improved cellophane tape properties and allows easy adjustment of surface gloss.

(Structure of the Invention) The method for producing a decorative material of the present invention includes a liquid-repellent printing layer formed on a base material using a curable liquid-repellent ink composition containing a liquid-repellent substance, and, if necessary, a liquid-repellent printing layer formed using a curable liquid-repellent ink composition containing a liquid-repellent substance, A normal printing layer formed using a composition is formed so that at least the liquid-repellent printing layer is exposed on the upper layer, and then a curable coating composition containing a water-soluble synthetic resin as a binder is applied onto the printing surface. Accordingly, recesses are formed on the liquid-repellent printing layer by repelling the curable coating composition.

Hereinafter, the present invention will be explained in detail using the drawings.

FIGS. 1 to 3 are cross-sectional views showing a state in which a printing layer is provided on a base material, and FIG. 3 is a cross-sectional view showing a state in which a coating is further applied.

First, in the present invention, a liquid-repellent printed layer and a normal printed layer are provided on a substrate. When providing both printed layers, there are various arrangements as shown in Figures 1 to 3.
In the figure, a liquid-repellent printed layer 3 and a normal printed layer are arranged side by side on a base material λ'2. Both printed layers 3 and the rim may be spaced apart as shown in FIG. 1, or may be in contact with each other. In FIG. 2, a normal printing layer and a liquid-repellent printing layer 3 are laminated on a base material in the order shown. In FIG. 3, a part of the liquid-repellent printing layer 3 is directly on the base material λ, and the remaining part is a normal printing layer.
The two are laminated in contact with each other. In addition, the arrangement|positioning of both the printing layers shown in FIG. 1 - FIG. 3 may be used in combination mutually arbitrarily. Although not shown in the drawings, prior to providing both printing layers, a colored base may be provided over the entire surface of the base material 1a in order to hide the base material. Typical methods for providing the printed layer are as described above, but methods other than these may also be used, as long as the portions desired to form recesses in the final decorative material are exposed on the surface of the liquid-repellent printed layer.

Next, a curable paint containing a water-soluble synthetic resin as a binder is applied to the entire surface of the base material on which both printing layers are provided, and the paint is flicked on the exposed liquid-repellent printing layer described in -1- to form the recesses. By forming this, a decorative material having a protective layer B in which desired portions are concave portions aligned with the printed layer is obtained. Curing of the paint may be carried out using an appropriate means depending on the type of paint.

” The materials used in the above method are as follows.

Base Material In the above, the base material may be any material that is normally used as a base material for decorative materials (typically, paper such as tissue paper is used).

Examples of other substrates that can be used include: bleached kraft paper, titanium paper, linter paper, paperboard, gypsum board paper, impregnated paper made by impregnating these papers with resin, polyethylene film, polypropylene film. , polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polyethylene terephthalate film, polycarbonate film, nylon film, polystyrene film, ethylene vinyl acetate copolymer film, ethylene vinyl alcohol copolymer film, ionomer and other plastic films, wood, plywood,
Wood base materials such as particle board, gypsum base materials such as gypsum board and gypsum slag board, fiber cement board such as pulp cement board, asbestos cement board, wood chip cement board, G
RC and concrete, metal foils or sheets of iron, aluminum, copper, etc., and composites of the following two base materials.

Note that, before forming a composite, a decorative material may be manufactured using the first base material and then adhered to the second base material.

Curable liquid-repellent ink composition The curable liquid-repellent ink composition used to form the liquid-repellent printing layer 3 contains a liquid-repellent substance added, a curable resin as a vehicle, and any other optional additions. It is created using agents and solvents. □ In the above, known liquid repellent substances such as silicone and wax can be used, and the amount of the liquid repellent substance added is 2 to 10% by weight based on the ink composition. It is preferable to do so.

To explain in more detail about the silicone as the liquid repellent material, examples of the silicone include, for example, a methyl group, a propyl group, a phenyl group, a rogen atom, an alkoxy group, a hydroxyl group, an acetoxy group, a metal salt, etc. on a silicon atom. A low-molecular or high-molecular substance having a linear or cyclic structure in which groups of are optionally bonded can be used.

Vehicles for the ink composition include various curable vehicles, such as those that are cured by the reaction of polyester polyols or polyether polyols with isocyanate 1 to form polyurethane resins, and those that are cured by the reaction of polyester polyols or polyether polyols with isocyanate 1, and those that are cured by the reaction of epoxy resins with polyamides, polyamines, or acid anhydrides. Epoxy-based curing type that cures by reaction, thermosetting type made by adding a polymerization initiator such as peroxide and a polymerization catalyst such as cobalt naphthenate to a mixture of unsaturated polyester and styrene monomer, melamine resin or urea. Use thermosetting type resins and alkyd resins with para-toluene sulfonic acid added, or electron beam or ultraviolet curing types using epoxy acrylates or urethane acrylates with photosensitizers such as benzophenone or benzoin ether added. Then, the above-mentioned liquid-based substances, known additives such as plasticizers, stabilizers, dispersants, and fillers, and coloring agents such as dyes and pigments are added, and furthermore, a solvent and a diluent are added, and the mixture is kneaded. It can be made into an ink composition. These curable liquid repellent ink compositions are usually
It is used as a two-component type, and therefore a method is adopted in which the reaction catalyst and reaction promoter are added to the ink components immediately before use.

In addition to dust, additives may be added to the curable liquid-repellent ink composition to improve the properties of the ink. It is a good idea to add extender pigments for the purpose of matting. Calcium carbonate, magnesium carbonate, calcium hydroxide, silica, etc. can be used as extender pigments, and are added to the ink composition, for example, at about 1S% or less.

In the present invention, since the liquid-repellent ink composition is of a curable type, even if the liquid-repellent printed layer is exposed on all four parts of the obtained decorative material, the surface properties at the bottom of the recesses are the same as those of conventional ones. (It has improved compared to

Ordinary Ink Composition As the ordinary ink composition used to form the ordinary printing layer t, any known ink composition can be used. It is selected and used in consideration of the adhesion to the liquid printing layer or the aqueous curable coating composition or its coating film.

In the present invention, any known printing method may be used to provide each printing layer, and an appropriate method may be adopted in consideration of the ink composition and base material used.

Yukoku-type Coating Composition In the present invention, the curable coating composition used as a top coat to form a protective layer on the interface between the decorative materials uses a water-soluble curable synthetic resin as a binder. Examples of such synthetic resins include methylol melamine, methylol urea, water-soluble alkyd, water-soluble acrylic, and water-soluble polyester alone, or mixtures thereof, such as methylol melamine and water-soluble acrylic, methylol melamine and alkyd, and methylol melamine. and methylolurea. Among the above, water-soluble alkyd, water-soluble acrylic, and water-soluble polyester include alkyd, acrylic,
It refers to polyester resins in which the free C0OH groups in each resin are treated with amines, ethanolamine, etc. to make them water-soluble. The above synthetic resin is used together with an appropriate curing agent and catalyst for curing, if necessary.

It is best to use the following synthetic resins as a paint using water as a solvent or water and another organic solvent as a solvent.
Or is it possible to use an organic solvent in combination with other diluting solvents to form a paint that takes less time to dry after application?
This is preferable because it can be done easily.

The curable coating composition may be applied by a method such as roll coating or gravure roll coating, and the coating amount is 3 g/m,' (when dry,
The same applies below), and the upper limit is s o 1. /
It is about 7i. The amount of application is '#/n? ~ttg/
77j is more practical.

In addition, a liquid-repellent substance may be added to the curable coating composition in order to impart stain resistance and Sellotape resistance to the surface of the decorative material. As the liquid-repellent substance, those mentioned above as added to the curable liquid-repellent ink composition can be used, and either silicone or wax may be used, but it is preferable to use wax, and it is preferable to use silicone and wax in combination.

In the present invention, a water-soluble synthetic resin is used as a binder for the paint used to form the protective layer, so it has poor wettability on the liquid-repellent printing layer. Since the tendency of the paint to be repelled is greater than in the case of conventional methods, it is possible to form extremely sharp recesses.

(Effects of the Invention) According to the method of the present invention described above, it is possible to produce a decorative material in which the shape of the recess is sharp, there is no bulge on both sides of the recess, and the surface properties of the recess are improved.

(Example) Examples are listed below to further specifically explain the present invention.

Example / Reinforced paper with a basis weight of 30 g/rrt (manufactured by Sanko Paper Co., Ltd., F
ix,? 0) as a base material, a solid layer and a pattern layer were provided by a gravure printing method using an ink having the following composition, and then a conduit was printed to create a woodgrain pattern printed paper.

-Ink composition for evening layer and pattern layer Polyvinyl butyral resin 10 parts by weight Pigment 3Q// Ink composition for conduit part (polyurethane type) Polyester polyol resin 22 parts by weight Pigment (carbon black)
/Qtt Matting agent (micro silica) 3 // Silicone 6 〃 Hardening agent (incyanate type) / solvent -7s to the above composition
/, 20 parts by weight of a solution of 25 (weight ratio) was added and mixed immediately before use.

The obtained printed paper was heated to 10°C to harden the conduit part.
It was kept at a temperature of

After curing, a top coat of the following composition was applied by a gravure coating method to a dry thickness of gji/m, and after application, it was dried by heating at a temperature of /30'C for 3θ seconds.

Silicone 5 〃 Matting agent (silica) 5 〃 Hardening agent (para-toluenesulfonic acid) lo /l solvent (
Water/methanol-773)! A decorative material having four parts formed by repelling the top coat paint in synchronization with the conduit part was obtained through the process using r0 parts by weight or more.

Example Core aminoalkyd resin 35 parts by weight Matting agent (micro silica) 5/l Silicone Otsu/l Pigment 10 A similar decorative material was obtained in the same manner as in Example except that the above conduit ink was used. Ta.

[Brief explanation of the drawing]

1 to 2 are sectional views showing each step of the present invention. ......Base material 3...Liquid-repellent printing layer...
...Normal printing layer S...Cosmetic material B...Protective layer Patent applicant Dai Nippon Printing Co., Ltd.

Claims (3)

[Claims] (1) @liquid printing layer formed using a curable liquid-repellent ink composition containing a liquid-repellent substance on a substrate and, if necessary, a normal printing layer formed using a normal ink composition. A liquid repellent printed layer is formed so as to be exposed on the upper layer, and then a curable coating composition containing a water-soluble synthetic resin as a binder is applied onto the printed surface. A method for producing a decorative material, characterized by forming recesses due to repelling of a curable paint composition. (2) The method for producing a decorative material according to claim (1), wherein the curable coating composition further contains a liquid-repellent substance. (3) The curable liquid-repellent ink composition further contains an extender pigment.
) The method for manufacturing the decorative material described in section 2.