JP2024020721A - Decorative sheet and decorative laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative laminate excellent in designability and coating suitability, and having visual three-dimensional feeling and tactile three-dimensional feeling, and to provide a decorative sheet to be used for the decorative laminate.

SOLUTION: A decorative sheet 10 comprises: a sheet base material 1; a pattern layer 2 formed by printing on an upper side UP of the sheet base material 1; a first surface protective layer 3 laminated on an upper side UP of the pattern layer 2; and a second surface protective layer 4 partially laminated on an upper side UP of the first surface protective layer 3 and having brightness different from that of the first surface protective layer 3. The second surface protective layer 4 has a thin film part 4b, and a thick film part 4a having a height of 1.2 times or more of the height of the thin film part 4b in the vertical direction.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a decorative sheet and a decorative board.

Decorative sheets used as surface materials for furniture and residential building materials are formed with a plurality of surface protective layers with different glosses, giving them a visual three-dimensional effect or a sense of luxury. In addition, by forming irregularities on the surface by embossing or the like, a three-dimensional effect is imparted by a tactile sensation. For example, in a decorative sheet with a wood grain pattern, by giving a visual three-dimensional effect due to the difference in gloss between the conduit part of the wood grain pattern and other parts, and giving a three-dimensional effect to the touch with the unevenness of the surface, it looks more like natural wood. We can provide decorative sheets with similar wood grain patterns.

As a decorative sheet that imparts a difference in gloss and a tactile feel, there is a decorative sheet described in Patent Document 1. In the decorative sheet described in Patent Document 1, a second surface protective layer having a gloss different from that of the first surface protective layer is partially laminated above the first surface protective layer laminated above the picture pattern layer. It has a visual three-dimensional effect. Moreover, by partially laminating a third surface protection layer having a thickness four times or more as thick as the second surface protection layer on the upper side of the second surface protection layer, a three-dimensional effect can be obtained by touch. As a result, the decorative sheet described in Patent Document 1 can provide a decorative sheet that has a visual stereoscopic effect and a tactile stereoscopic effect.

JP2017-24318A

However, the decorative sheet described in Patent Document 1 has poor design because the boundary between the second and third surface protective layers is noticeable due to the difference in gloss between the second and third surface protective layers. There is a possibility. Furthermore, it is necessary to form three surface protective layers, and three gravure plates are required for printing the surface protective layer, which increases printing costs.

Based on the above circumstances, the present invention has been made in view of the above-mentioned problems regarding decorative sheets that have a three-dimensional effect due to the difference in gloss of the surface protective layer and a three-dimensional effect due to the touch. An object of the present invention is to provide a decorative board that has a visual three-dimensional effect and a three-dimensional sense of touch, and a decorative sheet used for the decorative board.

In order to solve the above problems, the present invention proposes the following means.
The decorative sheet of the present invention includes a sheet base material, a picture pattern layer formed on the upper side of the sheet base material by printing, a first surface protective layer laminated on the upper side of the picture pattern layer, and the first surface a second surface protective layer that is partially laminated on the upper side of the protective layer and has a gloss different from that of the first surface protective layer; and a thick film part having a height 1.2 times or more of the height of the part.

In the decorative sheet, the second surface protective layer includes a particle portion formed of synthetic resin beads or an inorganic compound filler to form the thick film portion, and the particle portion has an average particle size of 15 μm or more. Good too.

In the above decorative sheet, the second surface protective layer may include a thermosetting resin having a urethane bond.

In the above decorative sheet, the second surface protective layer may contain an ionizing radiation curable resin.

In the above decorative sheet, the particle portion may be acrylic resin beads.

The decorative board of the present invention includes the above-mentioned decorative sheet and a substrate adhered to the lower side of the decorative sheet.

According to the decorative sheet and decorative board of the present invention, it is possible to provide a decorative board that is excellent in design and coating suitability and has a three-dimensional visual effect and a three-dimensional effect by touch, and a decorative sheet used for the decorative board. Can be done.

It is a sectional view of the decorative board concerning this embodiment. FIG. 7 is a cross-sectional view of a decorative board according to modification example 1-3 of the present embodiment.

One embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a sectional view of a decorative board according to this embodiment.
In this embodiment, as shown in FIG. 1, the thickness direction of the decorative board 100 is the "vertical direction V", the side where the substrate 20 is bonded to the decorative sheet 10 is the "lower side LO" in the vertical direction V, and the decorative sheet 10 The side opposite to the side to which the substrate 20 is bonded is defined as the "upper side UP" in the vertical direction V.

Further, as shown in FIG. 1, the height of the thick film portion 4a of the second surface protection layer 4 in the vertical direction V is “height H1”, and the height of the thin film portion 4b in the vertical direction V is “height H2”. It is defined as

The decorative board 100 includes a decorative sheet 10 and a substrate 20.
The substrate 20 is adhered to the lower side LO of the decorative sheet 10. As the substrate 20, particle board, medium density fiberboard (MDF), or the like can be used. Alternatively, the substrate 20 may be a plate-shaped member made of metal such as aluminum or stainless steel, or a composite board in which metal such as aluminum is attached to both sides of a core material made of resin such as polyethylene.

The decorative sheet 10 includes a sheet base material 1, a pattern layer 2, a first surface protection layer 3, and a second surface protection layer 4.
The sheet base material 1 is a layer laminated on the lower side LO of the decorative sheet 10. The sheet base material 1 is a sheet-like layer made of a known material that can be printed. As the sheet base material 1, a fibrous sheet such as thin paper or titanium paper can be adopted. Further, as the sheet base material 1, a resin sheet made of polyethylene, polypropylene, polyvinyl chloride, or the like may be employed.

The pattern layer 2 is a layer formed by printing on the upper side UP of the sheet base material 1, and is formed by, for example, printing a pattern such as wood grain, stone grain, or sand grain. As the printing method, for example, known printing methods such as gravure printing, offset printing, flexo printing, silk screen printing, or inkjet printing can be employed. For the pattern layer 2, a known printing ink suitable for the printing method used can be used.

The first surface protection layer 3 is a layer laminated on the upper side UP of the picture pattern layer 2. It is desirable to use a transparent or translucent material for the first surface protection layer 3 to the extent that the pattern of the pattern layer 2 can be seen through. As the first surface protective layer 3, a thermosetting resin having a urethane bond or an ionizing radiation curable resin such as an acrylic resin can be used. As a method for laminating the first surface protective layer 3, for example, known printing methods such as gravure printing, offset printing, flexo printing, silk screen printing, or inkjet printing can be employed. Moreover, the first surface protection layer 3 may be laminated using a known coating device.

The second surface protection layer 4 is a layer partially laminated on the upper side UP of the first surface protection layer 3. The second surface protection layer 4 is desirably made of a material that is transparent or translucent to the extent that the pattern of the picture pattern layer 2 can be seen through the first surface protection layer 3 . As the second surface protection layer 4, a thermosetting resin having a urethane bond or an ionizing radiation curable resin such as an acrylic resin can be used.

The first surface protection layer 3 and the second surface protection layer 4 have different glosses. As a method of imparting a difference in gloss between the first surface protection layer 3 and the second surface protection layer 4, there is a method of adding a matte material to the first surface protection layer 3 or the second surface protection layer 4. For example, if no matte material is added to the first surface protection layer 3 and a matte material is added to the second surface protection layer 4, the first surface protection layer 3 has a higher gloss than the second surface protection layer 4. has. Different amounts of matting material are added to the first surface protection layer 3 and the second surface protection layer 4 to the extent that a difference can be imparted to the gloss between the first surface protection layer 3 and the second surface protection layer 4. Good too.
The difference in gloss between the first surface protective layer 3 and the second surface protective layer 4 makes it possible to create a visual sense of three-dimensionality by utilizing the illusion of the human eye.

The second surface protection layer 4 includes particle portions 5 . The particle portion 5 is made of synthetic resin beads or an inorganic compound filler, and gives a three-dimensional feel to the second surface protective layer 4. It is desirable to use a transparent or translucent material for the particle portion 5 to the extent that the pattern of the pattern layer 2 can be seen through the first surface protection layer 3 and the second surface protection layer 4. As the particle part 5, it is desirable to use acrylic resin beads with an average particle diameter of 15 μm or more, which have high transparency and can give a three-dimensional effect to the touch.

Moreover, the second surface protection layer 4 has a thick film part 4a and a thin film part 4b whose height is lower than the height H1 of the thick film part 4a in the vertical direction V. The thin film portion 4b has a coating thickness (height H2) of, for example, 0.5 μm or more and 13 μm or less, and is laminated on the upper side UP of the first surface protective layer 3 with a substantially constant coating thickness (height H2). ing.

The thick film portion 4a is formed at the position where the particle portion 5 of the second surface protection layer 4 is arranged. By coating the particle portion 5 with the printing resin forming the second surface protection layer 4, the height of the thick film portion 4a in the vertical direction V becomes higher than that of the thin film portion 4b by the particle size of the particle portion 5. . Therefore, the thick film portion 4a protrudes higher than the thin film portion 4b.
The height of the second surface protection layer 4 may change smoothly from the height H1 of the thick film portion 4a to the height H2 of the thin film portion 4b. For example, the printed resin of the second surface protective layer 4 is pulled by the synthetic resin beads of the particle part 5 by surface tension, forming a gentle slope between the thick film part 4a and the thin film part 4b.

In order to provide an excellent visual three-dimensional effect and tactile three-dimensional effect, the height H1 of the thick film portion 4a of the second surface protective layer 4 is 1.2 times or more the height H2 of the thin film portion 4b.

As a method for laminating the second surface protective layer 4, intaglio printing such as gravure printing can be employed. For example, in the grooves into which the printing resin of a gravure plate used for gravure printing is poured, the printing resin and the particle part 5 flow into the groove which is deeper than the particle size of the particle part 5; The particle portion 5 does not flow into the shallow groove, and only the printing resin flows therein. As a result, the second surface protection layer 4 has a portion where the particle portion 5 is arranged and a portion where the particle portion 5 is not arranged. The part where the particle part 5 is arranged forms the thick film part 4a, and the part where the particle part 5 is not arranged forms the thin film part 4b.

It is desirable that the second surface protective layer 4 be formed at a position that is in synchronization with the picture pattern layer 2. For example, when the picture pattern layer 2 has a wood grain pattern, by forming the second surface protective layer 4 at a position that is synchronized with the conduit portion of the wood grain pattern, the first surface protective layer 3 and the second surface protective layer 4 can be The difference in gloss can give the conduit a visual three-dimensional effect.
Further, it is desirable that the thick film portion 4a of the second surface protection layer 4 be formed at a position that is in synchronization with the picture pattern layer 2. For example, when the picture pattern layer 2 has a wood grain pattern, by forming the thick film part 4a at a position that is aligned with the conduit part of the wood grain pattern, the height H1 of the thick film part 4a and the height H2 of the thin film part 4b can be adjusted. A three-dimensional effect can be given to the conduit portion by the difference in tactile sensation. As a result, by combining the visual stereoscopic effect and the tactile stereoscopic effect, the stereoscopic effect of the conduit portion is further emphasized, and it is possible to provide a decorative sheet 10 with a wood grain pattern that is closer to the appearance of natural wood.

According to the decorative sheet 10 and the decorative board 100 of the present embodiment, the first surface protection layer 3 and the second surface protection layer 4 have different glosses, so they have a visual three-dimensional effect. Further, since the height H1 of the thick film portion 4a of the second surface protection layer 4 is 1.2 times or more the height H2 of the thin film portion 4b, it has a three-dimensional effect by touch. That is, the two layers, the first surface protection layer 3 and the second surface protection layer 4, can provide a visual three-dimensional effect and a three-dimensional effect by a tactile sensation. By combining visual three-dimensional effect and tactile three-dimensional effect, a more emphasized three-dimensional effect can be provided. Further, since both the thick film part 4a and the thin film part 4b are included in the second surface protection layer 4, there is no large difference in gloss between the thick film part 4a and the thin film part 4b, and the thick film part 4a and the thin film part 4b The border between the two is hardly noticeable.
As a result, it is possible to provide a decorative laminate 100 that has a visual three-dimensional effect and a tactile three-dimensional effect that is excellent in design and coating suitability, and a decorative sheet 10 used for the decorative laminate 100.

Although one embodiment of the present invention has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and may include design changes without departing from the gist of the present invention. Moreover, the components shown in the above-mentioned embodiment and the modification shown below can be configured by appropriately combining them.

(Modification 1)
In the above embodiment, the decorative sheet 10 includes the sheet base material 1, the pattern layer 2, the first surface protective layer 3, and the second surface protective layer 4, but the aspect of the decorative sheet is not limited to this. For example, as shown in FIG. 2, the decorative sheet may include a layer such as a conduit ink layer 2a. By forming the conduit ink layer 2a on the upper side UP of the pattern layer 2, a three-dimensional effect can be visually provided. At this time, the three-dimensional effect can be further emphasized by arranging the thick film portion at a position synchronized with the conduit ink layer 2a.

(Modification 2)
In the above embodiment, the sheet base material 1 is a single layer sheet such as a fibrous sheet or a resin sheet, but the form of the sheet base material is not limited thereto. For example, as shown in FIG. 2, the sheet base material 1A may be a composite sheet in which a resin layer 1c is sandwiched between an upper paper base material 1a and a lower paper base material 1b. For example, by sandwiching a water vapor-impermeable resin layer 1c between an upper paper base material 1a and a lower paper base material 1b made of a fibrous sheet, it is possible to impart moisture resistance to the sheet base material 1A.

(Modification 3)
In the above embodiment, the thick film portion 4a is formed at the position where the particle portion 5 of the second surface protection layer 4 is arranged, but the aspect of the thick film portion is not limited to this. The thick film portion may be formed at a position where the particle portion 5 of the second surface protection layer is not placed. In the grooves into which the printing resin of the gravure plate used for printing the second surface protective layer is poured, a larger amount of printing resin flows into the deeper grooves than into the shallower grooves. As a result, in the second surface protection layer, the portions of the gravure plate where the grooves are deep are higher in height than the portions where the grooves are shallow. That is, by making a difference in the depth of the grooves of the gravure plate, it is possible to form a second surface protective layer having partially different heights without disposing the particle portions 5. At this time, by making the height of the deep groove part of the gravure plate in the second surface protective layer 1.2 times or more the height of the shallow groove part (thin film part), As shown in FIG. 2, thick film portions 4Aa can be formed at positions where particle portions 5 of second surface protection layer 4A are not arranged.

(Modification 4)
In the embodiment described above, the picture pattern layer 2 is formed by printing a picture such as wood grain, stone grain, or sand grain, but the aspect of the picture pattern layer is not limited to this. The pattern layer does not need to have a pattern such as wood grain, stone grain, or sand grain.

The present invention will be explained in detail below with reference to Examples. The present invention is not limited to the following examples.

(Example 1)
As the sheet base material 1, base paper for decorative paper was prepared. A picture pattern layer 2 having a wood grain pattern was formed on the upper side UP of the sheet base material 1 by gravure printing. A first surface protection layer 3 was formed on the upper side UP of the picture pattern layer 2 by gravure printing. A second surface protection layer 4 containing particle portions 5 made of acrylic resin beads was formed on the upper side UP of the first surface protection layer 3 by gravure printing.
The height H1 of the thick film portion 4a of the second surface protection layer 4 was 15 μm, and the height H2 of the thin film portion 4b was 0.5 μm. In this way, the decorative sheet 10 of Example 1 was formed.

(Example 2)
The decorative sheet 10 of Example 2 was formed in the same manner as in Example 1, except that the height H2 of the thin film portion 4b of the second surface protection layer 4 was 1 μm.

(Example 3)
The decorative sheet 10 of Example 3 was formed in the same manner as in Example 1 except that the height H2 of the thin film portion 4b of the second surface protection layer 4 was 13 μm.

(Example 4)
The decorative sheet 10 of Example 4 was prepared in the same manner as in Example 1, except that the height H1 of the thick film portion 4a of the second surface protection layer 4 was 7 μm, and the height H2 of the thin film portion 4b was 2.1 μm. Formed.

(Example 5)
The decorative sheet 10 of Example 5 was prepared in the same manner as in Example 1, except that the height H1 of the thick film portion 4a of the second surface protection layer 4 was 18 μm, and the height H2 of the thin film portion 4b was 2.1 μm. Formed.

(Example 6)
The decorative sheet 10 of Example 6 was prepared in the same manner as in Example 1, except that the height H1 of the thick film portion 4a of the second surface protection layer 4 was 31 μm, and the height H2 of the thin film portion 4b was 2.1 μm. Formed.

(Example 7)
The decorative sheet 10 of Example 7 was prepared in the same manner as in Example 1, except that the height H1 of the thick film portion 4a of the second surface protection layer 4 was 57 μm, and the height H2 of the thin film portion 4b was 2.1 μm. Formed.

(Example 8)
The decorative sheet 10 of Example 8 was prepared in the same manner as in Example 1, except that the height H1 of the thick film portion 4a of the second surface protection layer 4 was 113 μm, and the height H2 of the thin film portion 4b was 2.1 μm. Formed.

(Comparative example 1)
A decorative sheet of Comparative Example 1 was formed in the same manner as in Example 1 except that the height of the thin film portion of the second surface protective layer was 14 μm.

(Experiment 1)
A design evaluation test was conducted on the decorative sheets of Examples 1-8 and Comparative Example 1. In the design evaluation test, 10 examiners conducted a sensory test of the design of the first surface protective layer and the second surface protective layer of the decorative sheet, and evaluated the appearance of the design.
The evaluation criteria were 4 levels, and evaluations other than 1 were considered passed.
4: More than 9 people and less than 10 people evaluated the design as good in appearance.
3: The number of people who evaluated the design as good in appearance was 7 or more and 8 or less.
2: The number of people who evaluated the design as good in appearance was between one and six.
1: 0 people rated the design as good in appearance.

(Experiment 2)
A tactile evaluation test was conducted on the decorative sheets of Examples 1-8 and Comparative Example 1. In the tactile evaluation test, 10 examiners conducted a sensory test of the tactile sensation of the second surface protective layer of the decorative sheet, and evaluated the degree of tactile sensation.
The evaluation criteria were 4 levels, and evaluations other than 1 were considered passed.
4: More than 9 people and less than 10 people rated the texture as good.
3: The number of people who evaluated the feel as good to the touch was 7 or more and 8 or less.
2: The number of people who evaluated the feel as good to the touch was 1 or more and 6 or less.
1: 0 people rated the texture as good.

(Experimental result)
The results of Experiment 1-2 are shown in Table 1. The height ratio in Table 1 is a value obtained by dividing the height of the thick film portion by the height of the thin film portion, and rounding the value to the second decimal place. In other words, it indicates how many times the height of the thick film portion is greater than the height of the thin film portion.
Examples 1-8, in which the height ratio was 1.2 times or more, showed good results in Experiment 1 and Experiment 2. Among Examples 1-8 and Comparative Example 1, Comparative Example 1, which had the smallest height ratio of less than 1.2 times, failed in Experiments 1 and 2.

100 Decorative board 10 Decorative sheet 1 Sheet base material 2 Pattern layer 3 First surface protective layer 4 Second surface protective layer 4a Thick film part 4b Thin film part 5 Particle part 20 Substrate H1 Height of thick film part H2 Height of thin film part V Vertical direction UP Upper side LO Lower side

Claims (6)

sheet base material,
a picture pattern layer formed by printing on the upper side of the sheet base material;
a first surface protective layer laminated above the picture pattern layer;
a second surface protection layer that is partially laminated on the upper side of the first surface protection layer and has a gloss different from that of the first surface protection layer;
Equipped with
The second surface protective layer is
a thin film part;
a thick film part having a height that is 1.2 times or more the height of the thin film part in the vertical direction;
has,
Cosmetic sheet. The second surface protective layer includes a particle portion formed of synthetic resin beads or an inorganic compound filler to form the thick film portion,
The particle portion has an average particle size of 15 μm or more,
The decorative sheet according to claim 1. The second surface protective layer contains a thermosetting resin having a urethane bond.
The decorative sheet according to claim 1. The second surface protective layer includes an ionizing radiation curable resin.
The decorative sheet according to claim 1. The particle portion is an acrylic resin bead.
The decorative sheet according to claim 2. The decorative sheet according to any one of claims 1 to 5,
a substrate adhered to the lower side of the decorative sheet;
Equipped with
Decorative board.

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