JP3475912B2 - Decorative plate, decorative sheet, and production method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a decorative plate and a decorative sheet having a desired printed pattern on the surface, and a method for producing them.

[0002]

2. Description of the Related Art In recent years, desks, storage furniture, system kitchens,
Resin veneer is used for the top of furniture such as store fixtures. A pattern is often formed on the resin decorative board by gravure printing. Gravure printing is performed by preparing a mesh original plate having a desired pattern, filling the mesh of the original plate with printing ink, and transferring the ink in the mesh to the surface of the pattern paper by rotating the original plate. This is a printing method in which the size of the mesh is changed to change the size of the ink dots when the shade of the pattern is added.

[0003]

[Problems to be Solved] However, in gravure printing, an original plate must be produced for each pattern. Therefore, the cost is high to print different patterns for each item according to the order. Further, in the case of performing full-color multicolor printing, at least four original plates are required, and thus a large amount of original plate charges are required.

Further, when a pattern having a pattern structure (pitch) of 2 m or more is reproduced by gravure printing, the original plate becomes large and printing cannot be performed by an ordinary gravure printing machine. Furthermore, when an overlay layer was formed on the gravure-printed ink, there was a problem in that it was easily peeled off when exposed to the fire of a cigarette.

An example of using gravure printing on a decorative plate is disclosed in Japanese Patent Laid-Open No. 168540/1988, and a resin is impregnated into the paper from between the printing irregularities (dots). Since printing is a printing method in which the dot size of the ink changes as described above, the resin impregnation property of the area where the large dots are dense is poor and uneven impregnation occurs. There was still room for improvement due to the problem of peeling.

In view of the above conventional problems, the present invention aims to provide a decorative plate and a decorative sheet which are excellent in the durability of a printed pattern and low in cost, and a manufacturing method thereof.

[0007]

A of A of claim 1 invention, the decorative board having a pattern layer formed on the substrate, the pattern layer, Ri Na with resin is impregnated into the formed paper printing layer by inkjet printing , And the printed layer is flat on paper.
Dot of ink having a diameter within ± 50% of the average diameter
It is a decorative board characterized in that it is formed by

The decorative board of the present invention has a print layer formed by ink jet printing. Inkjet printing is
This is a printing method of a system in which the ejection of ink is controlled to form a print layer composed of ink dots. The dots make up the pattern. Therefore, the pattern can be arbitrarily changed by controlling the ejection of ink. Therefore, the original plate required for conventional gravure printing becomes unnecessary, and different patterns can be easily formed for each product at low cost.

Further, full-color printing can be performed by ejecting a plurality of inks and mixing them at an appropriate ratio. Therefore, it is possible to easily perform multicolor printing at the same time without using a plurality of original plates such as gravure printing.

Further, in the conventional gravure printing, the size of the dots is changed to create the shading of the printing layer. On the other hand, the print layer formed by the inkjet printing of the present invention is composed of dots of ink having substantially the same size. Therefore, in inkjet printing, the amount of impregnated resin that is a post-process can be controlled by the number of dots to be printed (dpi) per square inch,
Prevents resin impregnation unevenness and prevents blisters from swelling and design damage due to boiling tests. In addition, since the ink is composed of dots of almost the same size, it has excellent adhesion to the upper resin-impregnated overlay layer, and does not swell even when a cigarette fire or the like comes into contact with it.

Furthermore, since the printing layer is formed by changing the arrangement and density of ink dots in ink jet printing, it is possible to form a pattern with more beautiful gradation and better realism than gravure printing. It also has advantages in pattern formation, such as the moire phenomenon that often occurs in gravure printing does not occur.

The print layer is composed of ink dots formed by ink jet printing. The print layer forms a pattern when there is a gap between dots, and when there is no gap, a continuous solid print layer is formed. The printed layer may be composed of dots of only one color. In this case, a one-color pattern or one-color solid print layer is formed.

The printing layer may be formed by combining dots of a plurality of colors. In this case, patterns of multiple colors are formed. 6-color printing is also possible. The color of the ink may be any color, but in addition to red, blue, yellow and black, complementary colors such as light cyan, light magenta, orange and green can be used.

In the present invention, after the ink jet printing, the paper constituting the pattern layer is impregnated with the resin, but it is desirable to adjust the output image resolution of the ink jet for the resin impregnation. The output image resolution of the inkjet is preferably 150 to 1000 dpi. If the output image resolution is less than 150 dpi, the resolution may be reduced and the reproducibility of the printed document may be reduced. 1000 dpi
If it exceeds, the ink serves as a barrier, the impregnation of the resin into the printed paper is reduced, and the printed layer may peel off.

The output image resolution is 150 to 500.
dpi is desirable. As a result, it is possible to obtain a product excellent in the reproducibility of a pattern original (original) and an excellent decorative plate. On the other hand, if the output image resolution is less than 150 dpi, the resolution is reduced and the reproducibility of the printed document may be reduced. When it exceeds 500 dpi, the ink serves as a barrier, the impregnation property of the resin into the printed paper is deteriorated, and the printed layer may be easily peeled off.

As in the invention of claim 5, it is preferable that a protective layer made of a cellulose compound is previously formed on the surface of the paper constituting the pattern layer. Thereby, penetration of printing ink can be suppressed and a clear printing layer can be formed. The cellulose compound is preferably at least one selected from cellulose acetate and carboxymethyl cellulose.

Further, as in the invention of claim 6, it is preferable that the protective layer made of the cellulose compound is formed in a mesh shape on the surface of the paper constituting the pattern layer. In this case, the paper is impregnated with resin through the mesh of the protective layer.
Therefore, the resin layer is not impregnated in the pattern layer, and the heat resistance and boiling resistance are not reduced.

In order to form the mesh of the protective layer, for example, a screen printing method or the like is performed. The thickness of the protective layer is 30-100
It is preferably μm. If it is less than 30 μm,
This is because the effect of suppressing the permeation of printing ink into the paper is deteriorated and the design property is deteriorated, and when it exceeds 100 μm, the impregnation property of the resin into the paper is deteriorated.

According to the invention of claim 7, it is preferable that the paper constituting the pattern layer contains ash. This makes it possible to hide the color of the substrate. The ash content in the paper is preferably 0.2-40% by weight.
If the amount is less than 0.2% by weight, the effect of hiding the color of the base material may be deteriorated. If the amount is more than 40% by weight, the resin impregnation property into the paper is deteriorated and the dimensional stability of the decorative plate It may decrease.

As the paper forming the pattern layer, a printing paper suitable for printing is used. As the printing paper, kraft paper, titanium paper, or other dedicated paper for decorative boards can be used. Further, in the case of the solvent-based pigment ink, paper having a good resin impregnation property can be used. This is because it is possible to exhibit the same color tone as when printing on the paper for exclusive use for inkjet printing. Examples of paper with good resin impregnation include:
There are high basis weight (150-200 g / m ² ) titanium paper, non-woven fabric, Japanese paper, linter paper, etc. for single-color decorative boards. Also,
The base material may be resin-impregnated core paper obtained by impregnating paper with resin such as kraft paper, or may be plywood or wood board.

The backing layer is preferably provided on the surface of the substrate opposite to the side on which the pattern layer is formed. The backer layer is preferably made of the same resin as the resin with which the pattern layer is impregnated. This can prevent the veneer from warping. The resin with which the pattern layer is impregnated preferably has the same coefficient of thermal expansion as the resin forming the backer layer. Thereby, the warp of the decorative plate can be effectively suppressed. For example, when the resin impregnated in the pattern layer is melamine resin, the backer layer is made of melamine resin.

The resin contained in the paper constituting the pattern layer is preferably at least one thermosetting resin selected from melamine resin, diallyl phthalate resin, unsaturated polyester resin and epoxy resin. The reason is that thermal deformation is difficult. The amount of resin impregnated in the paper forming the pattern layer is preferably 20 to 70% (weight of resin / weight of the entire resin-impregnated pattern paper).

The phenol resin is the most suitable resin for impregnating the core paper. Resin impregnation amount of core paper is 20 ~ 70%
It is desirable that (weight of resin / weight of resin-impregnated core paper as a whole).

The ink used in the ink jet printing is preferably a water-based pigment ink. This makes it possible to form a clear pattern with less bleeding of the printed ink. Also,
The weather resistance and heat resistance of the pattern are improved. The aqueous pigment ink contains, for example, a pigment, a cellulose compound, and a binder. It should be noted that ink for inkjet printers is ejected due to thermal foaming or vibration and is deposited on paper.

As in the invention of claim 9, the ink used for the ink jet printing is preferably a solvent-based pigment ink. As a result, even when printing on paper having good resin permeability, it is possible to develop the same color tone as when printing on paper for exclusive use in inkjet printing. In addition, the printed layer formed of the solvent-based pigment ink sufficiently satisfies physical properties such as heat resistance and peeling resistance by boiling. Furthermore, since the solvent-based pigment ink dries quickly, it is possible to suppress wrinkling of the paper due to the drying.

As in the tenth aspect of the invention , it is preferable that an overlay layer is formed on the pattern layer. The print layer formed on the pattern layer is printed by inkjet and has dots of approximately the same size. Therefore, the presence of the large dots does not reduce the adhesion between the overlay layer and the pattern layer, and the overlay layer does not peel from the pattern layer even under severe conditions such as cigarette fire contact and boiling. . In addition, the presence of the overlay layer protects the printed layer and improves wear resistance. As the overlay layer, resin-impregnated paper obtained by impregnating paper such as bleached kraft paper with little or no ash with resin, or a translucent film such as polyester film can be used.

The decorative board of the present invention is a desk, furniture, storage furniture,
It is used by being adhered to the surface of fittings such as system kitchens, store furniture, doors, etc., but is not limited to these.

Next, the printed layer is formed on a paper by
By ink dots with diameters that are within 50%
Has been formed .

That is, the print layer is composed of dot groups. The diameter of each dot is within ± 50% of the average diameter, and there is no great difference in dot size. For this reason, uniform gaps are formed between the dots, and almost uniform gaps are distributed in the print layer. Since the resin is impregnated into the paper through the gap, no local resin non-impregnated portion is generated in the pattern layer. Therefore, the printed layer firmly adheres to the resin-impregnated paper, and peeling does not occur in boiling tests. Also,
The large dots do not reduce the adhesion with the overlay layer, and the overlay layer does not peel off due to cigarette fire or the like. On the other hand, the average diameter of the dots is ± 50
When there are dots having a diameter outside the range of%, the gaps between the dots are unevenly distributed, and the adhesion of the printing layer to the resin-impregnated paper may be reduced.

As for the average diameter, the average value of the diameter of one dot is measured with a KEYFME type microscope VH-7 or the like, and this is performed for all the dots on the screen to calculate the average diameter of all the dots. A screen with a magnification of about 50 is desirable.

In the present invention, when the dot is a circle, the diameter of the dot means the diameter of the dot, and when the dot is not a circle, the diameter of the dot means the maximum diameter and the minimum diameter of one dot. And the average. The average diameter of dots means a value obtained by adding the diameters of all the dots in the dot group constituting the print layer and dividing by the number of dots.

[0032]

Next, the invention of claim 2 is such that the pattern is formed on the substrate.
A decorative plate having a patterned layer formed thereon,
Is printed on paper with a printing layer formed by inkjet printing.
It is impregnated with grease, and the printed layer is almost the same on the paper.
It is a decorative plate characterized by being formed by dots of ink of one size .

In the present invention, the size of the dots of the ink forming the print layer is almost the same. The shading of the print layer can be added by changing the dot arrangement and density. Therefore, large dots do not cause resin unimpregnated parts, peeling does not occur in boiling tests, etc., and large dots do not reduce the adhesion to the overlay layer, and the overlay layer does not adhere to the fire of cigarettes. Does not peel off.

The sizes of the dots of ink forming the print layer are almost the same. The difference in dot size in the dot group is preferably within ± 20% of the average diameter. If it exceeds 20%, unevenness of resin impregnation may occur and the durability of the printed layer may decrease.

As in the fourth aspect of the invention, it is preferable that the dots of the ink forming the printing layer have an average diameter of 1 μm to 500 μm. If it is less than 1 μm, the ink may not be deposited on the paper. If it exceeds 500 μm, the pattern (printing layer) composed of dots may be rough and the appearance may be poor.

Next, according to the invention of claim 3 , the printing is performed.
The layers are formed by circular ink dots on the paper
Is preferred.

In this case, the printed layer is formed from a group of circular dots. Therefore, not only when the circular dots are dispersed and arranged without overlapping each other, but also when the circular dots are densely arranged, a gap is formed between the dots. Therefore, the resin is uniformly impregnated into the paper through the gap. Therefore, the adhesion of the printed layer to the resin-impregnated paper can be increased.

[0039] The invention according to claim 1 1, indicia with the manufacturing method of the decorative laminate pattern layer on a substrate is formed, to form a printed layer performs ink jet printing on paper
The printing layer has a diameter within ± 50% of the average diameter or almost the same.
Characterized in that it is formed by dots of ink of size, and then the paper is impregnated with a resin to form a resin-impregnated pattern paper, and the resin-impregnated pattern paper and a substrate are laminated and heated and pressed to be integrated. It is a method of manufacturing a decorative board.

In this manufacturing method, the printing layer is formed by inkjet printing. Therefore, the pattern can be arbitrarily changed by controlling the ejection of ink, and a different pattern for each product can be easily formed at low cost. Further, as described above, it is possible to easily perform multicolor printing simultaneously. Further, the pattern formed by inkjet printing has high adhesion to paper, and ink is less likely to peel off. Therefore, according to the manufacturing method of the present invention, it is possible to obtain a decorative board having excellent pattern durability. Also, the average diameter
Printing with dots having a diameter within ± 50% of
Since the layers are formed, the same effect as the above decorative board can be obtained.
You can

Further, since the pattern is formed by changing the dot arrangement and the density in the ink jet printing, a delicate pattern can be formed as compared with the gravure printing. In addition, the shade of the pattern can be added freely.

A printing layer is formed on the printing paper by ink jet printing to obtain a patterned paper. A resin-impregnated pattern paper is obtained by impregnating this pattern paper with a resin. Resin impregnated pattern paper is resin impregnated core paper,
It is laminated on a base material such as plywood and integrated by heating and pressing to form a decorative board. The heating and pressurizing conditions are 80 to 200 ° C. and 20
It is preferably 5 minutes to 60 minutes at 150 kg / cm ² . The base material may be resin-impregnated core paper obtained by impregnating paper with resin as described above, or may be plywood or wood board. When integrated with the resin-impregnated patterned paper, a plurality of resin-impregnated core papers may be laminated and heated and pressed.

[0043] The invention according to claim 1 2, in the decorative sheet on which a pattern layer on the paper is formed, the pattern layer,
Ri names in paper to form a printed layer by an inkjet printing resin is impregnated, and the printed layer on paper, the average diameter of the
Ink dots with diameters within ± 50%
It is a decorative sheet characterized by being formed .
In this decorative sheet, since the printing layer is formed by inkjet printing, the same effect as in the case of the decorative plate can be obtained.

[0044]

The invention of claim 1 3, the pattern layer forms the paper
In the decorative sheet made of the above, the pattern layer is
Resin is applied to the paper on which the printing layer is formed by inkjet printing.
Impregnated and the printed layer is almost identical on the paper
It is a decorative sheet characterized in that it is formed of ink dots of a size . Since the desired printing layer is formed by the ink dots having substantially the same size, it is possible to obtain the same effect as that of the decorative plate.

According to a fourteenth aspect of the present invention , the printing layer
Are formed by circular ink dots on the paper
Is preferred. Since the desired printing layer is formed by the circular ink dots, the same effect as that of the decorative board can be obtained. In addition, as in claim 15,
The ink dots have an average diameter of 1 to 500 μm.
And are preferable (see the description of claim 4).

As in the sixteenth aspect of the present invention, it is preferable that a protective layer made of a cellulose compound is previously formed on the surface of the paper forming the pattern layer. As a result, a clear print layer can be formed. As in the invention of claim 17 , it is preferable that the protective layer made of the cellulose compound is formed in a mesh shape on the surface of the paper constituting the pattern layer. As a result, it is possible to prevent the resin non-impregnated portion from being formed on the paper.

According to the eighteenth aspect of the invention, it is preferable that the paper forming the pattern layer contains ash. This makes it possible to hide the color of the base material. Claim 19
As in the invention of the ink used for the ink-jet printing, it has preferably be made of a water-based pigment ink. As a result, a clear pattern can be formed with less bleeding of the printed ink.

[0049] As the invention of claim 20, the ink used for the ink-jet printing, have preferably be made of solvent-based pigment inks. This ensures that even good resin permeability paper, can be formed the same color as printed on the inkjet printing special paper. In addition, it is possible to form a printing layer which has a quick drying time and which also has satisfactory physical properties.

As in the twenty-first aspect of the invention, it is preferable that an overlay layer is formed on the pattern layer. As a result, the print layer can be protected.
The invention of claim 22 is a method for producing a decorative sheet, comprising a pattern layer formed on paper, wherein inkjet printing is performed on the paper to form a print layer, and the print layer has an average diameter.
Within ± 50% of the diameter or the same size
It is a method for producing a decorative sheet, which is characterized in that it is formed of ink dots and then the paper is impregnated with a resin to obtain a resin-impregnated pattern paper. Also in this manufacturing method, a decorative sheet having excellent durability can be manufactured.

[0051]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 A decorative board according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (a), the decorative board 7 of this example is formed by printing ink on an printing paper (ash content 5%) 5 to form a printing layer 1 forming a pattern, impregnating a melamine resin 2, This is integrated with the core layer 8 which is a base material.

As shown in FIG. 1B, a network-shaped protective layer 4 made of a cellulose compound is previously formed on the surface of the printing paper 5 before the printing layer 1 is formed. Protective layer 4
The size of the holes 40 forming the mesh of is about 10 μm. The thickness of the protective layer 4 is 50 μm.

As shown in FIG. 2A, when the printing layer 1 is formed on the printing paper 5 by ink jet printing, a pattern 11 composed of a set of dots 10 having substantially the same size is formed. The average diameter of the dots is 192 μm, and the variation in the diameter of the dots is −20 to + 20% of the average diameter. As shown in FIG. 2 (b), the pattern 11 changes the arrangement and density of the ink dots 10 to generate light and shade. That is, the desired pattern 11 is formed by changing the arrangement and density of the ink dots 10. The light color portion 11a of the pattern 11 has a low density of the ink dots 10, and the dark color portion 11b has a high density of the dots 10. As shown in FIGS. 1 (a) and 2 (b),
The pattern 11 includes dots 10a, 10b, 1 of plural kinds of colors.
It consists of a set of 0c.

The ink used for ink jet printing is a water-based pigment ink and contains a cellulose compound such as hydroxypropyl cellulose as a main component, casein as a binder, and a pigment. The printing paper is kraft paper with 0.2-40% by weight of ash (mainly titanium oxide)
Contains. This printing paper is printed by an inkjet printing method to form a pattern paper. The resin contained in the pattern paper is melamine resin.

Although the overlay layer is not formed on the surface of the pattern layer 6 in this example, the overlay layer 9 may be formed as shown in FIG. 2C. Further, in this case, the protective layer made of a cellulose compound may not be formed.

In manufacturing the decorative board of this example, first, titanium paper containing ash and titanium (basis weight: 80 g /
m ² ) was prepared and used as printing paper. Next, cellulose acetate or hydroxypropyl cellulose was printed on the surface of the printing paper by a screen printing method to form a protective layer made of a cellulose compound. Next, an aqueous pigment ink was printed on the surface of the cellulose protective layer by an inkjet printing method to form a printed layer having a desired shape. In the inkjet printing, a scanner that captures an image, a computer that processes the image, and an inkjet printer (echo graphic; manufactured by Chalcone) that outputs the processed surface image were used. The output image resolution is 300 dpi.

Next, the printed pattern paper was impregnated with a melamine resin to obtain a resin-impregnated pattern paper. The amount of impregnation is
It was 60%. In FIG. 1A, the print layer 1 is covered with the melamine resin 2, but when the resin is impregnated, the melamine resin 2 eventually covers the surface of the print layer. Further, kraft paper (basis weight 190 g / m ² ) was impregnated with phenol resin to obtain resin-impregnated core paper. The impregnation amount was 50%. As shown in FIG. 3A, a plurality of resin-impregnated core papers 80 and resin-impregnated pattern papers 50 are laminated and heated and pressurized under the conditions of 150 ° C. and 80 kg / cm ² ,
A decorative plate 7 including the core layer 8 and the pattern layer 6 was obtained.

When forming the overlay layer, as shown in FIG. 3 (b), a resin-impregnated paper 90 is prepared by impregnating resin into paper such as bleached kraft paper containing little or no ash. The resin-impregnated paper 90 is laminated on the resin-impregnated pattern paper 50 and heated and pressed.

As shown in FIG. 2 (a), the decorative plate 7 thus obtained was able to form a pattern 11 which was shaded due to the difference in the arrangement warp density of the ink dots 10. Moreover, the pattern had excellent durability.

Further, as shown in FIG. 1A, the print layer 1
Is formed on the surface of the protective layer 4 made of a cellulose compound, so that the pattern is clear without blurring. In addition, since the pattern is composed of ink dots of almost the same size, the ink is unlikely to peel off and has durability. Figure 1
As shown in (b), since the protective layer 4 made of a cellulose compound has a mesh shape, the resin can be impregnated between the holes 40 of the mesh, and the resin-impregnated portion cannot be formed on the printing paper 5, resulting in durability. It has excellent properties.

As shown in FIG. 4, when a photomicrograph was taken of the decorative sheet 7 of this example, dots of two shades of light and shade were arranged, and the sizes of all the dots were almost the same.

Comparative Example 1 As shown in FIG. 2D, the decorative plate of this example has a pattern 119 formed by gravure printing. In gravure printing, by changing the size of the ink dots 19,
It has a shade. The average diameter of the dots is 200 μm, and the variation in the diameter of the dots is -52% of the average diameter.
+ 53%. The surface of the printing paper 5 may be covered with the overlay layer 9. Others are the same as those in the first embodiment. A pattern 119 formed by gravure printing is formed. Therefore, the overlay layer 9 immediately above the large dot 19 is easily peeled off, and a resin-impregnated portion 18 is easily formed under the large dot 19. In addition, when a micrograph of the dark and light two-color pattern 119 was taken, as shown in FIG. 5, there were variations in the size of each dot. Others,
This is similar to the first embodiment.

Experimental Example 1 In this example, a heat resistance test was carried out in which the tip of an ignited cigarette was pressed against the surface of a decorative plate, and then whether or not pattern peeling occurred was observed. As shown in FIG. 2 (c), this test was performed on the decorative plate 7 in which the protective layer was not formed but the overlay layer 9 was formed. Further, for comparison, as shown in FIG. 2E, the same process was performed in the case where the pattern 119 was formed by gravure printing instead of inkjet printing.

As a result, no peeling of the print layer 1 forming the pattern 11 was observed in the ink-jet printed product as shown in FIG. 2C, but in the gravure-printed product as shown in FIG. 2E, Peeling occurred in the area where the ink was dense. Note that this heat resistance test is described in the case of having the overlay layer, but the same applies to the case of not having the overlay layer.

Experimental Example 2 In this example, a durability test was conducted by immersing a decorative plate in boiling water at 100 ° C. for 24 hours and observing whether or not peeling occurred. This test was performed on the decorative board shown in FIG. 1 having a protective layer 4 made of a cellulose compound but not forming an overlay layer. The same procedure was performed when the pattern was formed by gravure printing instead of inkjet printing.

As a result, no peeling was observed in the ink-jet printed product, but in the gravure-printed product,
Peeling occurred in the area where the ink was dense. In addition, although the case where the overlay layer is not provided is described, FIG.
As shown in (c) and FIG. 2 (e), even when the overlay layer 9 is provided, similarly, peeling did not occur in inkjet printing, but peeling occurred in gravure printing.

Embodiment 2 First, titanium paper containing ash (mainly titanium oxide) (basis weight: 80 g / m ² ) was prepared and used as a printing paper.
Next, the aqueous pigment ink was printed on the surface of the protective layer made of a cellulose compound by an inkjet printing method to form a printed layer having a desired shape. The average diameter of the inkjet is 195 μm, and the variation in the diameter of the ink dots is −15 to + 15% of the average diameter. Next, the printed pattern paper was impregnated with a melamine resin to obtain a resin-impregnated pattern paper. The impregnation amount was 60%.

Kraft paper (basis weight 190 g / m ² )
Was impregnated with phenol resin to obtain a resin-impregnated core paper.
The impregnation amount was 50%. Further, bleached kraft paper (bleached kraft paper, basis weight 10 g / m ² , ash content 0%) was impregnated with a melamine resin to obtain a resin-impregnated overlay paper.
The resin-impregnated core paper, the resin-impregnated pattern paper, and the resin-impregnated overlay paper are laminated and heated and pressed under the conditions of 150 ° C. and 80 kg / cm ² (see FIG. 3B) to form the core layer 8, the pattern layer 6 and the overlay. The decorative board 7 including the layer 9 was obtained (see FIG. 2C).

The decorative plate 7 has excellent heat resistance. For example, when a cigarette fire is pressed, no peeling occurs between the overlay layer and the pattern layer. On the other hand, in the case of gravure printing, peeling occurred in the area where the ink was dense.

Embodiment 3 In manufacturing the decorative board of this example, first, titanium paper containing titanium oxide (basis weight: 80 g / m ² ) was prepared.
This was used as printing paper. Next, a solvent-based pigment ink was printed on the surface of titanium paper by an inkjet printing method to form a print layer having a desired shape.

In the ink jet printing, a scanner for taking in an image, a computer for processing the image, and an ink jet type printer (Lamires; manufactured by Muto Kogyo Co., Ltd.) for outputting the processed image were used. Output image resolution is 3
It was 84 dpi. The average diameter of an ink dot is 30
It is 0 μm, and the variation of the dot diameter is −
It was 30 to + 30%. Next, the printed pattern paper was impregnated with a melamine resin to obtain a resin-impregnated pattern paper. The impregnation amount was 6%.

Kraft paper (basis weight 190 g / m ² )
Was impregnated with phenol resin to obtain a resin-impregnated core paper.
The resin impregnation amount was 50%. Furthermore, bleached kraft paper (bleached fluff paper, basis weight 10 g / m ² , ash content 0%)
Was impregnated with melamine resin to obtain a resin-impregnated overlay paper. Resin-impregnated core paper, resin-impregnated pattern paper, and resin-impregnated overlay paper are laminated at 150 ° C, 80 kg / cm ²
By heating and pressurizing under the conditions (see FIG. 3B), the core layer 8,
A decorative plate 7 including the pattern layer 6 and the overlay layer 9 was obtained (see FIG. 2C).

As shown in FIG. 3 (b), the obtained decorative plate 7 is printed on the printing paper 5 even if the protective layer 4 is removed because the printing layer 1 is quick-drying which is a characteristic of the solvent-based pigment ink. The resin does not penetrate so much, ink remains on the surface of the printing paper 5, and the reproducibility of the printed pattern is excellent. Further, since the pattern is composed of a set of ink dots of approximately the same size, the resin can be uniformly impregnated, and the resin-impregnated portion cannot be formed on the printing paper 5, resulting in excellent durability. From the above effects, it was confirmed that the same effect as the decorative board of the first embodiment can be obtained with the decorative board of this example.

[0074]

According to the present invention, it is possible to provide a decorative plate and a decorative sheet which are excellent in the durability of a printed pattern and low in cost, and a method for producing them.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view (a) and a plan explanatory view (b) of a decorative plate in Embodiment 1.

FIG. 2 is a plan view (a) of a decorative plate showing a pattern formed by inkjet printing according to the first embodiment, an explanatory view (b) of dots formed by inkjet printing, and a decorative plate formed by inkjet printing. Sectional explanatory view (c), a plan view of a decorative plate showing a pattern formed by gravure printing as a comparative example (d), and a sectional explanatory view (e) of a decorative plate formed by gravure printing.

3A to 3C are manufacturing process explanatory views showing a method for manufacturing a decorative board in Embodiment 1, wherein FIG. 3A is a protective layer but no overlay layer, and FIG. 3B is a protective layer but no overlay. Layers indicate the case.

FIG. 4 is a drawing-substituting photograph showing a state of dots formed by inkjet printing on a decorative plate in Embodiment 1.

FIG. 5 is a drawing-substituting photograph showing the state of dots formed by gravure printing on a decorative plate in Comparative Example 1.

[Explanation of symbols]

1. ． ． Print layer, 2. ． ． resin, 4. ． ． Protective layer, 40. ． ． Mesh, 5. ． ． Printing paper, 6. ． ． Pattern layer, 7. ． ． Veneer, 8. ． ． Core layer, 9. ． ． Overlay layer,

Claims (22)

(57) [Claims] 1. A pattern layer on a substrate is formed veneer, the pattern layer, Ri names in paper to form a printed layer by inkjet printing the resin is impregnated, and the print layer may be paper Above ± 50% of average diameter
Formed by dots of ink with a diameter within
Decorative plates, characterized in that that. 2. A pattern layer formed on a substrate
In the decorative board, the pattern layer is formed by inkjet printing.
The formed paper is impregnated with resin, and the printing layer is formed on the paper with ink of almost the same size.
A decorative board characterized by being formed of dots . 3. The decorative plate according to claim 1, wherein the printing layer is formed by dots of circular ink on a paper. 4. The method according to any one of claims 1 to 3,
The dots of the above ink have an average diameter of 1 to 500 μm.
Decorative plates, characterized in that that. 5. The method according to any one of claims 1 to 4,
A decorative board characterized in that a protective layer made of a cellulose compound is previously formed on the surface of the paper constituting the pattern layer. 6. The decorative plate according to claim 5, wherein the protective layer made of the cellulose compound is formed in a mesh shape on the surface of the paper forming the pattern layer. 7. The method according to any one of claims 1 to 6 ,
The decorative plate, wherein the paper forming the pattern layer contains ash. 8. The method according to any one of claims 1 to 7 ,
The decorative plate, wherein the ink used for the inkjet printing is a water-based pigment ink. 9. The method according to any one of claims 1 to 7 ,
The ink used in the inkjet printing is a solvent-based pigment ink, which is a decorative board. 10. A any one of claims 1 to 9 on said pattern layer, the decorative plate, wherein the overlay layer is formed. 11. A pattern layer is formed on a substrate.
In the method of manufacturing a decorative board, Inkjet printing on paper to form a print layerThen
In both cases, the printed layer has a diameter within a range of ± 50% of the average diameter or
Formed with ink dots of almost the same size, Then A resin-impregnated pattern paper is obtained by impregnating the paper with a resin.
Then The resin-impregnated patterned paper and the substrate are laminated and heated and pressed to form one
A method for manufacturing a decorative board, characterized by being embodied. 12. A decorative sheet patterned layer on the paper is formed, the pattern layer, Ri names in paper to form a printed layer by inkjet printing the resin is impregnated, and the printed layer on paper , Within ± 50% of average diameter
Is formed by ink dots having a certain diameter
A decorative sheet characterized by that . 13. A makeup formed by forming a pattern layer on paper.
In the sheet, the pattern layer is a printing layer formed by inkjet printing.
The formed paper is impregnated with resin, and the printing layer is formed on the paper with ink of almost the same size.
A decorative sheet formed by dots . 14. The mark according to claim 12 or 13.
The printing layer is formed by circular ink dots on the paper.
Decorative sheet, characterized in that is. 15. The method according to any one of claims 12 to 14.
The dots of the above ink have an average diameter of 1 to 500 μm.
A decorative sheet characterized by being m . 16. The decorative sheet according to claim 12 , wherein a protective layer made of a cellulose compound is previously formed on the surface of the paper forming the pattern layer. 17. The decorative sheet according to claim 16, wherein the protective layer made of the cellulose compound is formed in a mesh shape on the surface of the paper forming the pattern layer. 18. The decorative sheet according to claim 12 , wherein the paper constituting the pattern layer contains ash. 19. The ink used in the inkjet printing according to any one of claims 12 to 18 ,
A decorative sheet comprising an aqueous pigment ink. 20. The decorative sheet according to any one of claims 12 to 18, wherein the ink used for the inkjet printing is a solvent-based pigment ink. 21. In any one of claims 12 to 20, the decorative sheet on said pattern layer, a feature that formed by overlay layer is formed. 22. Makeup comprising a pattern layer formed on paper
In the sheet manufacturing method, Inkjet printing on paper to form a print layerThen
In both cases, the printed layer has a diameter within a range of ± 50% of the average diameter or
Formed with ink dots of almost the same size, Then A resin-impregnated pattern paper is obtained by impregnating the paper with a resin.
A method for manufacturing a decorative sheet, comprising: