JPS5843271B2 - Decorative material manufacturing method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing decorative materials.

Traditionally, interior materials for building materials, interior decoration materials, home appliances, televisions,
Various decorative materials have been used and developed for cabinet materials such as stereos and materials for musical instruments, but in recent years, decorative materials have become more sophisticated and aesthetically pleasing, and there is an extreme demand for the feel of real wood. , and the development of such things is also progressing.

For example, the method of creating concavities in conduit sections, which is commonly used as a method of improving the wood texture, has conventionally been roughly divided into physical embossing methods and chemical embossing methods.

The method of physically pressing the embossing is to overlap the decorative base material with the wood grain pattern and a mold roll or template and create the embossing using heat or pressure. Alternatively, it is extremely difficult and expensive to make a template, and furthermore, it is extremely difficult to match the pattern between the template roll or template and the decorative base material.

It is extremely difficult to match each of the additional wood-grained conduits one by one.

In addition, chemical embossing methods include methods that use curing inhibitors, curing accelerators, etc. to change the curing speed to create dents using the difference in resin contraction, and photo-curable resins. Various methods are known, such as one that takes advantage of the difference in curing between areas irradiated with light and areas that are not irradiated, or one that makes dents by making the conduit part liquid repellent using ink containing silicone, etc. There is.

However, these methods often involve chemical effects, and many parts are easily affected by various surrounding environments such as temperature, humidity, ink adjustment, coating amount and curing speed, resulting in product variations. However, complex problems remain in terms of quality and workmanship, and the product is not satisfactory as a product with excellent and consistent design effects.

Another method is to create a concave appearance by making the conduit part matte.

For example, a method is to print the conduit portion with ink containing a large amount of pigment, and then apply a transparent paint thereon to absorb the paint and make the area matte.

However, this method becomes ineffective if the coating amount of the transparent paint is increased to the extent that sufficient physical properties are obtained, and if the coating amount is too small, the conduit becomes white and the design effect is reduced.

Furthermore, even if the method was effective, the transparent paint penetrated into the conduit portion, resulting in the deterioration of the physical properties of that portion.

The present invention, as a result of various studies on the above-mentioned methods, is a method for producing a decorative material that is simpler, more effective, and that satisfies the physical properties.

The gist of the present invention to achieve the above object is that when printing a wood grain pattern on a base material such as tissue paper, printing film, or plywood, the conduit portion of the pattern is formed using ink containing a matting agent and using a hardening resin as a binder. , print to give a large amount of ink to build up the curable transparent synthetic resin paint layer to be applied later, apply the curable transparent synthetic resin paint before the ink is sufficiently dry, and then apply the ink and the curable resin paint layer. By curing the transparent synthetic resin paint, the conduit part bulges the transparent resin layer, and the transparent resin paint penetrates into the ink containing the matting agent, creating a raised matte state in a semi-cylindrical shape. Rather, it has a three-dimensional embossed effect that looks matte from any angle.

The most important requirement for achieving the object of the present invention is that the curable transparent synthetic resin paint be applied before the ink containing the matting agent has sufficiently dried.

Next, the above-mentioned present invention will be explained in more detail below.

The base material 1 of the present invention can be various papers or processed papers such as thin paper and titanium paper, various synthetic papers such as polypropylene and polyethylene, mixed papers, cellophane, polyolefins such as polyethylene and polypropylene, and polyvinyl chloride. Various resin films such as polyvinylidene chloride, polyester, and polystyrene, or a combination thereof, or a sheet coated with various resins can be used.

Further, plate-shaped bodies such as plywood, particle board, gypsum board, cement board, and metal plate can also be used as the base material 1 by applying necessary treatments such as pasting thin sheets or coating with resin.

When the above-mentioned film or sheet-like material is used as the substrate 1, if the substrate lacks hiding properties or has poor printability such as lack of smoothness or adhesion with ink,
If necessary, a sheet or film 2 that does not have the above defects may be pasted on or below the base material 1 in order to compensate for the defects.

Alternatively, a resin that eliminates the above-mentioned drawbacks may be appropriately flowed.

Next, a wood grain pattern 3 is printed on the base material 1.

Printing in this case can be performed by any known method, such as gravure printing, planographic printing, letterpress printing, screen printing, transfer printing, etc., but gravure printing is the most common.

In this case, inks that are commonly used for decorative materials may be selected depending on the type of base material.

In this case, if a curable ink is used, the strength of the base material will further increase.

Next, the conduit portion 4 is printed with a conduit portion that matches the wood grain pattern.

In this case, the printing is done so as to give enough ink to build up the transparent synthetic resin paint 5 to be applied later.

Screen printing, gravure printing, etc. are used to provide such a large amount of ink, but gravure printing is more suitable.

When printing the conduit portion 4 by gravure printing, a gravure plate having a plate depth of 90 μm or more is used in order to provide a sufficient amount of ink as described above.

The ink used to form the conduit portion 4 is a hardening type ink containing a matting agent.

Curing ink is an ink that uses a curable resin as a binder, and even ink that uses a two-part curable resin as a binder.
Although an ink using a liquid-curing resin as a binder may be used, it is advantageous to use an ink using a two-component curing resin as a binder, since the pot life of the ink is longer.

Examples of resins used as binders for such curable inks include aminoalkyd resins, urethane resins, acrylic urethane resins, polyester resins, phenolic resins, and melamine resins, which are particularly effective since they are suitable for gravure printing. It is.

When using ink with a two-component curing resin as a binder, there are two methods: one is to mix the two-component curing resin into an ink before printing, and the other is to mix one of the two-component curing resins into the ink. One may be used as a binder, and the other may be placed in the transparent synthetic resin paint 5 to be applied later, so that the two components of the two-component curing resin become one when the paint is applied. .

The ink used to print the conduit portion 4 contains a matting agent.

Known matting agents are used for this matting agent; for example, pigments, calcium carbonate, magnesium carbonate, and barium sulfate can also be used because they have a matting effect, but the proportion of them in the ink is small and the surface area is large. Silica-based fillers, etc., which have a strong ability to adsorb transparent resin, are most effective.

After printing the conduit portion 4, before the ink has sufficiently dried, that is, before the ink has dried to form a film, the curable transparent synthetic resin paint 5 is coated using the same gravure printing machine or other coating device.

Since the most important point of the present invention is to coat the top coat resin before the ink becomes a dry film, the reason for this will be described in detail.

The first reason is that if the ink is not sufficiently dry, there will be many interparticle spaces in the ink layer, and the top coat resin will flow through these spaces into the inside of the ink layer due to capillary action. It penetrates easily and the ink layer is exposed to the surface and becomes matte, whereas when the ink is dried into a film, the above-mentioned spaces are gone and the top coat resin is This is because it becomes difficult to penetrate into the inside of the ink layer, and the top coat resin remains on top of the ink, making it impossible to obtain a sufficient matting effect.

The second reason is that if the ink is not sufficiently dry, the affinity between the hardening resin, which is the binder of the ink, and the top coat resin makes it easier for the top coat resin to penetrate into the ink layer, causing matting. However, if the ink has dried into a film, the effect of affinity cannot be expected, and the top coat resin will not be able to penetrate into the ink layer sufficiently, resulting in a sufficient matting effect. This is because it cannot be done.

For the above reasons, the most important point of the present invention is to coat the top coat resin before the ink becomes a dry film.

Even if the above operations are performed, if the amount of top coat resin applied is too large, a large amount of resin will remain without being penetrated by the ink, and the matting effect will be lost, so the amount of top coat resin applied is 16. g/lri' (dr
It is desirable to set the film thickness to 15 μm or less or less than y).

Further, the coating method of the transparent paint carried out here is not limited to the gravure coating method, but may be a roll coating method, an air knife coating, a bar code coating, or a dip coating, as long as the ink is not sufficiently dried.

The curable transparent synthetic resin paint referred to here is: first, when one of the two-component curable resins is used as a binder for the conduit ink, a two-component curable transparent paint of the same type as the binder of the ink containing the other is used. .

Next, as a binder for the conduit ink, 2 curable resins were added.
If both liquid types are used, the same transparent curable resin may be used, or different curable transparent resins may be used, and either one or two liquid types may be used. You can choose from a wide range of curing paints, including electron beam curing and acid curing.

For example, aminoalkyd resins, unsaturated polyester resins, urethane resins, acrylic urethane resins, epoxy resins, acrylic resins, vinyl resins, etc. can be used.

After applying the curable transparent synthetic resin paint 5, the conduit portion 4 is
The ink and the curable transparent resin synthetic resin paint 5 are cured.

Since the means for curing differs depending on the type of resin used, a conventionally known method suitable for each may be used.

In the decorative material obtained in this way, since the conduit part has a large amount of ink adhesion, the curable transparent synthetic resin paint 5 swells more than the other parts, and the curable transparent synthetic resin paint 5
is penetrated into the ink, and that part becomes matte, giving the conduit a semicylindrical matte appearance, so no matter what angle you look at it, it has almost the same effect as a natural wood conduit with a concave conduit. We can manufacture decorative materials.

The coating amount of the curable transparent synthetic resin paint 5 is 5 to 15 μm when considering both the matte effect of the conduit and the surface properties.
degree is desirable.

In addition, in the case where the ink used for printing the conduit part is one binder of a two-component curable resin, the decorative material according to the present invention can be used with the other resin contained in the curable transparent synthetic resin paint 5. It cures by reaction, and in the case of a binder containing both components of a two-component curing resin, it cures by the ink itself. Chemical resistance equivalent to part 5,
A decorative material with various physical properties such as abrasion resistance can be obtained.

The decorative material obtained according to the present invention can be in the form of a sheet, film, or plate depending on the base material 1 used.

For example, if tissue paper or resin film is used, decorative paper or decorative film can be obtained, and these can be attached to plywood or other surfaces and used for furniture materials, interior decoration materials, musical instrument materials, and various other uses. etc., it can be processed as it is and used for the various purposes mentioned above.

In the decorative material of the present invention, the conduit part is swollen due to the large amount of ink deposited, but the hardening type transparent synthetic resin paint penetrates and becomes a semi-cylindrical matte state, which can be seen from any angle. The conduit part looks concave and is a decorative material that closely resembles natural wood.

Next, examples of the present invention will be shown.

Example 1 On thin paper with a basis weight of 23 g/m, a solid base printing was applied using nitrocellulose-based gravure ink normally used in gravure printing, and then a zelkova plate grain pattern consisting of the base plate, middle plate, and conduit plate was applied. Using the same ink used for the solid printing of the woodgrain pattern base plate and midsection, gravure printing was performed in a hue that matched the pattern.

Next, using a conduit plate having a plate depth of 120 μm, gravure printing was performed using a matte ink having the composition shown below.

Carbon black iron oxide pigment: 10 parts (same parts by weight) Amino alkyd resin: 20 parts Silica matting agent: 10 parts Ethyl acetate, toluene, ■PA...60 parts Next, apply 71 coats of two-component thermosetting amino alkyd resin in-line using the gravure barcode method! /
m (Dry) and dried in an oven at 150° C. for 20 seconds to cure the ink and resin, thereby obtaining a decorative material according to the present invention.

Example 2 Using a salt-vinyl acetate gravure ink used for ordinary PVC sheets on a colored PVC sheet (thickness 0.2 mm), the base plate and midsection of the wood grain pattern of the walnut board pattern were gravure printed. provided.

Next, using a plate having a plate depth of 90 μm as a conduit plate, gravure printing was performed using a matte ink having the composition shown below.

Carbon black: 8 parts Two-component urethane resin: 20 parts Silica matting agent: 15 parts Ethyl vinegar, toluene, MEK: 57
Apply 10 g/m (dry) of acrylic urethane transparent synthetic resin paint using the gravure coating method on the local in-line.
A decorative material according to the present invention was obtained by coating, drying in an oven at 130° C. for 30 seconds, and curing the ink and resin.

Example 3 A base coat was applied to white polypropylene synthetic paper (thickness 0.08 mm) using urethane gravure ink normally used in gravure printing, and then the same ink as shown in Example 1 and A decorative material according to the present invention was obtained by printing using the same method.

[Brief explanation of drawings]

FIG. 1 shows an explanatory cross-sectional view for explaining the decorative material obtained by the present invention. 1... Base material, 2... Sheet or film, 3... Wood grain pattern, 4... Conduit portion,
5...Curing transparent synthetic resin paint.

Claims (1)

[Claims] 1. In a method of manufacturing decorative materials by printing a wood grain pattern on a base material and applying a synthetic resin paint to the printed surface, the conduit portion of the wood grain pattern is coated with ink containing a matting agent and using a hardening resin as a binder. Printing was performed so as to give a large amount of ink to build up the curable transparent synthetic resin paint to be applied later, and before the ink had sufficiently dried, the curable transparent synthetic resin paint was applied so as to bulge on the ink area. A method for producing a decorative material, characterized in that the ink and the curable transparent synthetic resin paint are then cured.