JP2019217740A - Decorative sheet, manufacturing method therefor, and decorative plate - Google Patents

Abstract

To provide a decorative sheet further improving characteristics such as a tactile feeling.SOLUTION: A decorative sheet 10 includes a thermoplastic resin layer 3 including a molten resin extruded from a T-die, interposed between a second paper substrate layer 2 and a laminate 7 including a first paper substrate, a pattern layer and a surface protective layer. The decorative sheet is caused to pass between a first press roll 22 and a second press roll 23, and thus the laminate 7 and the second paper substrate layer 2 are bonded through the thermoplastic resin layer 3. Then, using an embossing roll with protrusions formed on an outer peripheral surface at one of or both of the first press roll 22 and the second press roll 23, a plurality of embossing recesses are produced on a surface 10a of the decorative sheet 10 where the surface protective layer 5 is formed, when the decorative sheet 10 passes between the first press roll 22 and the second press roll 23.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a decorative sheet, a method for producing the same, and a decorative plate.

  2. Description of the Related Art Conventionally, a decorative sheet formed by bonding two thin papers via a thermoplastic resin layer has been proposed (for example, see Patent Document 1). In the decorative sheet described in Patent Document 1, after the two thin papers are bonded via the thermoplastic resin layer, the decorative sheet is heated to re-melt the thermoplastic resin layer, and then the decorative sheet is embossed. The embossed concave portion is provided on the surface of the decorative sheet.

JP-A-8-132582

In such a decorative sheet, further improvement in characteristics such as tactile sensation is required.
The present invention has been made in view of the above points, and an object of the present invention is to provide a decorative sheet, a method of manufacturing the same, and a decorative board, which are further improved in characteristics such as tactile sensation.

  In order to solve the above problems, one embodiment of the present invention provides (a) a first paper base layer and a second paper base layer, and (b) a first paper base layer and a second paper. A thermoplastic resin layer disposed between the base material layers and bonding the first paper base material layer and the second paper base material layer; and (c) formed on the surface side of the first paper base material layer. A pattern layer, and (d) a surface protection layer formed on the surface side of the pattern layer, (e) a plurality of embossed recesses formed on the surface side of the surface protection layer, and (f) a decorative sheet. The ratio of the maximum depth of the embossed recess located at the center of the decorative sheet to the maximum depth of the embossed recess located at the end of the decorative sheet is in the range of 1.0: 1.1 to 1.1: 1.0. The gist is that it is a decorative sheet inside.

  Further, another aspect of the present invention is that (a) a second paper base layer is extruded between a first paper base, a laminate of a pattern layer and a surface protection layer, and a second paper base layer. A decorative sheet comprising a thermoplastic resin layer of molten resin is passed between a first press roll and a second press roll, and the laminate and the second paper base layer are separated from each other by a thermoplastic resin layer. (B) using one or both of a first press roll and a second press roll with an embossing roll having a convex portion formed on an outer peripheral surface thereof. The present invention is a method of manufacturing a decorative sheet in which a plurality of embossed concave portions are provided on a surface of a decorative sheet on which a surface protective layer is formed when a sheet passes between a first press roll and a second press roll. And

  According to the present invention, the embossed concave portions can be uniformly provided on the entire surface of the decorative sheet. Therefore, it is possible to improve the uniformity of the tactile sensation and to provide a decorative sheet with further improved characteristics such as the tactile sensation, a method for producing the same, and a decorative plate.

It is sectional drawing which shows the decorative sheet which concerns on embodiment of this invention. It is sectional drawing which shows the decorative sheet which concerns on a modification. It is a schematic diagram which shows the schematic structure of a bonding apparatus. It is sectional drawing which shows the decorative board which concerns on embodiment of this invention.

  Hereinafter, a decorative sheet and a decorative plate according to an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and modifications such as design changes can be made based on the knowledge of those skilled in the art. Are included in the scope of the present invention. In addition, each drawing is appropriately exaggerated for easy understanding.

(Constitution)
As shown in FIG. 1, the decorative sheet 10 is provided between the first paper base layer 1 and the second paper base layer 2 and between the first paper base layer 1 and the second paper base layer 2. And a thermoplastic resin layer 3 for bonding the first paper base layer 1 and the second paper base layer 2 to each other. Further, it has a pattern layer 4 formed on the surface 1 a side of the first paper base material layer 1 and a surface protection layer 5 formed on the surface 4 a side of the pattern layer 4. That is, on the decorative sheet 10, the second paper base layer 2, the thermoplastic resin layer 3, the first paper base layer 1, the picture pattern layer 4, and the surface protection layer 5 are laminated in this order. The decorative sheet 10 includes a laminate 7 composed of the first paper base layer 1, the pattern layer 4 and the surface protection layer 5, and the thermoplastic resin layer 3 obtained by extruding the second paper base layer 2 from a T-die. Through the adhesive.

  Further, a plurality of embossed concave portions 6 are formed on the surface 10 a side of the surface protective layer 5 of the decorative sheet 10. For example, when the design of the design pattern layer 4 is a grain, each embossed recess 6 is formed in a groove shape extending in the longitudinal direction along the grain. The ratio between the maximum depth of the embossed concave portion 6 located at the center of the decorative sheet 10 and the maximum depth of the embossed concave portion 6 located at the end of the decorative sheet 10 is 1.0: 1.1 to 1.1: 1. 0.0. The end of the decorative sheet 10 is a portion of the raw sheet-shaped decorative sheet 10 within a range of 0 cm or more and 10 cm or less from the end face in the width direction of the raw sheet. More preferably, a portion within a range of 1 cm or more and 5 cm or less from the end face of the raw fabric width direction can be employed. The central portion of the decorative sheet 10 is a portion other than the above-described end portions. If the ratio is out of the range of 1.0: 1.1 to 1.1: 1.0, the embossed concave portions 6 are not uniform over the entire surface of the decorative sheet 10, so that the uniformity of the tactile sensation is reduced.

A plurality of embossed concave portions 8 are formed on the back surface 10b of the decorative sheet 10. Each embossed concave portion 8 is formed in a groove shape extending in the longitudinal direction, similarly to the embossed concave portion 6. It is preferable that the embossed concave portion 8 on the back surface 10b is formed so as to be shifted from the formation position of the embossed concave portion 6 on the front surface 10a so that the position in the laminating direction is different. They may be formed so that the positions in the stacking direction are the same.
In addition, each of the embossed concave portions 6 and 8 has a pair of presses that also function as an emboss unit when the laminated body 7 and the second paper base layer 2 are bonded via the thermoplastic resin layer 3 extruded from the T-die. By passing through the roll, it is formed on the front surface 10a and the back surface 10b.

(First paper base layer, second paper base layer)
As the first paper base layer 1 and the second paper base layer 2, for example, various paper materials containing 50% or more of cellulose fibers can be used. The thickness of the first paper base layer 1 and the second paper base layer 2, that is, the thickness of the paper material constituting the first paper base layer 1 and the second paper base layer 2, For example, the thickness is preferably 15 μm or more and less than 60 μm, and more preferably 25 μm or more and 35 μm or less. If the thickness of the paper material used for the first paper base layer 1 and the second paper base layer 2 is less than 15 μm, it is not suitable for printing and post-processing in terms of strength. On the other hand, when the thickness of the paper material is 60 μm or more, the embossability is low, and embossing may be difficult, or deep embossing may be difficult.

The thickness of the paper material constituting the first paper base material layer 1 and the second paper base material layer 2 is defined as the paper material used for the first paper base material layer 1 and the second paper base material layer 2, respectively. May have the same thickness. Alternatively, the paper material used for the first paper base layer 1 is thicker than the paper material used for the second paper base layer 2, that is, the paper material of the second paper base layer 2 is thicker. It may be set to be thinner than the paper material of the first paper base material layer 1, or vice versa. However, when the paper material of the second paper base material layer 2 is made thinner, breakage of the paper material on the surface 10a side on which embossing is performed is suppressed.
Further, by reducing the thickness of the paper material of the second paper base layer 2, the total thickness of the decorative sheet 10 as a whole can be further reduced. It is preferable to make the thickness of the paper material of the first paper base layer 1 thinner than that of the first paper base layer 1. In addition, since the paper material forming the first paper base layer 1 is thicker than the paper material forming the second paper base layer 2 in this manner, the first paper base layer 1 Printing becomes easier. In other words, the printability of the first paper base material layer 1 is improved.

(Thermoplastic resin layer)
The thermoplastic resin layer 3 is laminated between the first paper base layer 1 and the second paper base layer 2, and adheres the first paper base layer 1 and the second paper base layer 2 to each other. It is a layer for doing. Further, the thermoplastic resin layer 3 is also a layer for deforming when embossing is performed and for holding and fixing its shape. The thickness of the thermoplastic resin layer 3 is not limited, but is preferably, for example, 20 μm or more and 70 μm or less, more preferably 35 μm or more and 55 μm or less, and more preferably 45 μm or more and 55 μm or less. Even more preferred. Further, it is preferable that the thickness of the thermoplastic resin layer 3 is thicker than the paper material forming the first paper base material layer 1 and the paper material forming the second paper base material layer 2. In particular, that the thermoplastic resin layer 3 is thicker than the paper material constituting the second paper base layer 2, that is, the paper material of the second paper base layer 2 is thinner than the thermoplastic resin layer 3. preferable. Such a thermoplastic resin layer 3 is provided, for example, by forming the thermoplastic resin layer 3 using a T-die and bonding the first paper base layer 1 and the second paper base layer 2 together. Can be

The thermoplastic resin layer 3 is preferably made of, for example, a thermoplastic resin having a melting point of 100 ° C. or more and 200 ° C. or less. Examples of the thermoplastic resin include polyvinyl chloride, polyvinylidene fluoride, nylon 12, polyamide, polyvinyl alcohol, polystyrene, styrene / acrylonitrile copolymer, styrene / butadiene / acrylonitrile copolymer, high density polyethylene, and medium density polyethylene. Low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyacetal, polymethyl methacrylate, modified acryl, polycarbonate, polyacetal, nitrocellulose, cellulose propionate, ethyl cellulose, cellulose acetate, polyurethane and the like can be used.
By setting the melting point of the resin constituting the thermoplastic resin layer 3 in the range of 100 ° C. or more and 200 ° C. or less, embossing can be performed without causing thermal deterioration of the paper and without impairing productivity such as line speed. Can be. The thermoplastic resin constituting the thermoplastic resin layer 3 can be appropriately selected in consideration of the melting point. For example, in consideration of the resin price and the fluidity at the time of melting, for example, high-density polyethylene, medium-density polyethylene, It is preferable to use density polyethylene or the like.

(Picture pattern layer)
The picture pattern layer 4 is a layer for giving a picture or the like to the decorative sheet 10. The pattern layer 4 is preferably made of, for example, ink. As the picture, for example, a grain of wood can be used. As a printing method for providing such a pattern layer 4, for example, a known printing method or printing device can be used. The method is not particularly limited. For example, a gravure printing method can be used from the viewpoint of productivity and the like. The printing ink constituting the picture pattern layer 4 is not particularly limited, and a water-based ink or a solvent-type ink can be used, and the compatibility with the apparatus and the performance required for the decorative sheet 10 and the decorative plate can be obtained. It can be appropriately selected in consideration of the situation. In the case of a decorative sheet or a decorative plate, it is generally preferable to use a pigment type as a coloring agent contained in the ink in consideration of light resistance.

(Surface protection layer)
The surface protective layer 5 is a layer for imparting surface properties such as abrasion resistance to the decorative sheet 10. The surface protective layer 5 is also a layer for adjusting the gloss of the surface 10a of the decorative sheet 10 and obtaining a desirable design property. In this way, it is possible to visually create a sense of unevenness and express a higher degree of design in combination with the embossed concave portion 6. For example, a difference in gloss such as a conduit portion of a wood grain is partially provided to express a harder design. The surface protection layer 5 is preferably made of, for example, a transparent resin. As a method of providing such a surface protective layer 5, for example, a known coating device and a gravure printing device can be used. The transparent resin constituting the surface protective layer 5 is not particularly limited, and for example, a resin obtained by dispersing silica for gloss adjustment in a two-component curable urethane resin can be used.
Further, the surface protective layer 5 contains particles 5 a so that a part thereof protrudes from the surface of the surface protective layer 5. Thereby, the particles 5a are exposed from the surface 10a of the decorative sheet 10. As the particles 5a, for example, inorganic particles and synthetic resin particles can be used.

(Other layers)
As shown in FIG. 2, a matting layer 9 can be further provided between the pattern layer 4 and the surface protection layer 5. The matting layer 9 is a layer for adjusting the gloss of the surface 10 a of the decorative sheet 10. The matte layer 9 has a gloss value of 60 ° incident between the matte layer 9 and the surface protective layer 5 measured by a specular gloss measurement method according to JIS Z-8741, and is 1 to 30. It is also a layer for providing a gloss difference within the range. The thickness of the matting layer 9 is preferably, for example, in the range of 20 μm or more and 55 μm or less. The matting layer 9 is preferably made of, for example, a transparent resin to which a matting agent is added. As the transparent resin, for example, a transparent thermoplastic resin layer such as an acrylic resin can be used. The matting agent is also called a matting agent or a gloss adjusting agent, and is added according to the gloss (gloss) given to the surface 10 a of the decorative sheet 10.

  As the matting agent, for example, fine particles of an inorganic substance or an organic substance (resin) can be used. As the inorganic substance, for example, silica, alumina (α-alumina or the like), calcium carbonate, barium sulfate, kaolinite, aluminosilicate, or the like can be used. Further, as the organic substance (resin), for example, polycarbonate, nylon, urethane resin and the like can be used. As the matting agent, silica is particularly preferable. The average particle size of the matting agent is preferably in the range of 1 μm or more and 10 μm or less. The amount of the matting agent to be added is appropriately selected according to the desired gloss. Usually, 20 parts by mass of particles having a particle size of 10 μm or less is used for 100 parts by mass of the resin constituting the matting layer 9. It is added within the range of 30 parts by mass or less. In addition, you may make it add a well-known additive, such as a well-known ultraviolet absorber, to the matting layer 9 suitably.

(Embossing method)
Here, the laminated body 7 composed of the first paper base layer 1, the pattern layer 4 and the surface protection layer 5, and the second paper base layer 2 are interposed through the thermoplastic resin layer 3 extruded from the T-die 20. A method of performing embossing at the time of bonding will be described with reference to FIG. In addition, as for the method of forming the laminated body 7, a conventionally known method of forming a structure can be used, and the description thereof is omitted.
First, the laminate 7 is prepared. The total thickness D of the laminate 7 is, for example, 60 μm to 160 μm, and more preferably 80 μm to 120 μm. When the laminate 7 is formed, the thickness of the paper material constituting the first paper base material layer 1 is somewhat reduced because the laminate is applied under pressure.
Then, as shown in FIG. 3, the laminate 7 and the second paper base material layer 2 are bonded together (bonded) together with the second paper base material layer 2 via the thermoplastic resin layer 3 using a bonding device 21. The laminate is embossed. The bonding device 21 includes a first press roll 22, a second press roll 23, a drive roll 24, a back roll 25, and a peel roll 26.

  The first press roll 22 and the second press roll 23 have a cylindrical shape, are rotatable around a central axis, and have outer peripheries in contact with each other. Further, on the outer peripheral surface of the first press roll 22, a convex portion for forming the embossed concave portion 6 corresponding to the pattern or the like provided by the pattern pattern layer 4 is formed. That is, as the first press roll 22, an emboss roll having a convex portion formed on the outer peripheral surface is used. The laminate 7 supplied to the bonding device 21 is wound around the outer periphery of the first press roll 22 and proceeds. Then, the second paper base layer 2 is bonded to the first paper base layer 1. At that time, the decorative sheet 10 having the thermoplastic resin layer 3 made of the molten resin extruded from the T-die 20 is sandwiched between the laminate 7 and the second paper base layer 2 by a first press roll. The laminate 7 and the second paper base layer 2 are adhered to each other with the thermoplastic resin layer 3 passing between the second press roll 23 and the second press roll 23. When the decorative sheet 10 passes between the first press roll 22 and the second press roll 23, the decorative sheet 10 is embossed, and a plurality of decorative sheets 10 are formed on the surface 10 a of the decorative sheet 10 on which the surface protective layer 5 is formed. An embossed recess 6 is provided.

The drive roll 24 has a cylindrical shape, is rotatable around a central axis, and is rotated by a second press roll 23 and a drive roll 24 via a Teflon tape 27 (Teflon is a registered trademark). Is driven to rotate. In addition, the outer periphery of the back roll 25 is in contact with the second press roll 23, and presses the second press roll 23 toward the first press roll 22.
The peeling roll 26 is disposed downstream of the first press roll 22 and the second press roll 23, and discharges the embossed decorative sheet 10 from the bonding device 21.
In the method of manufacturing the decorative sheet 10 according to the present embodiment, an example has been described in which only the first press roll 22 is used as the embossing roll. For example, one of the first press roll 22 and the second press roll 23 may be used. Alternatively, an embossing roll having a convex portion on the outer peripheral surface may be used for both.

The height of the convex portion of the first press roll 22 is preferably, for example, 15 μm or more. This is because the depth of the embossed concave portion 6 in the finished decorative sheet 10 or decorative plate is 15 μm or more in that the embossed concave portion 6 has an unevenness in design and can be visually sensed effectively.
The second press roll 23 preferably has a hardness of 50 ° or more and 90 ° or less. In particular, those having a range of 50 ° or more and 70 ° or less are most preferable. If the hardness is higher than 95 °, the embossed design may be inferior. These hardnesses are measured in accordance with, for example, ISO 7619, JIS K 6301 A type, and JIS K 6253.
The hardness of the second press roll 23 is lower than the hardness of a normal rubber back roll. Therefore, by sandwiching the first press roll 22 and the second press roll 23, the first press roll 22 forms the embossed concave portion 6 on the front surface 10a side of the decorative sheet 10 and at the same time, on the back surface 10b side. The embossed recesses 8 are formed alternately.

Next, the relationship between the total thickness D of the decorative sheet 10 before embossing and the depth D1 (also referred to as the maximum depth) of the embossed concave portion 6 on the front surface 10a will be described.
In the decorative sheet 10 according to the present embodiment, since the above-described embossing method is adopted, the embossed concave portions 6 deeper than in the related art can be formed on the decorative sheet 10. Therefore, in the decorative sheet 10 according to the present embodiment, the depth D1 of the embossed concave portion 6 is larger than the total thickness D of the decorative sheet 10 before embossing (the thickness of the decorative sheet 10 in a region where the embossed concave portion 6 is not provided) D. Thus, the ratio is 115% or more. More preferably, the depth D1 of the embossed concave portion 6 is a ratio of more than 10% to 200% or less with respect to the total thickness D of the decorative sheet 10 before embossing. Since the embossed concave portion 6 is such a deep concave portion (groove), it is possible to form a design of the decorative sheet 10, for example, a sheet having a more natural woodgrain.

  In addition, the depth D1 of the embossed concave portion 6 is, for example, 15 μm or more, more preferably 30 μm or more, further preferably 45 μm or more, and further preferably 70 μm or more. As the depth D1 of the embossed concave portion 6 increases, the design of the decorative sheet 10 can be further improved, and the feel and texture can be improved. Further, the first paper base layer 1 and the second paper base layer 2 can be improved. The adhesive strength between each of the paper base material layers 2 and the thermoplastic resin layer 3 can be increased. Further, the depth D1 of the embossed concave portion 6 is preferably 200 μm or less, and in this case, the decorative sheet 10 can be provided with excellent moisture resistance.

  The decorative sheet 10 also has a plurality of groove-shaped embossed concave portions 8 on the back surface 10b side, that is, on the side where the decorative sheet 10 is attached to a base material or the like. Therefore, the bonding strength to a substrate or the like can be easily improved. Further, by providing the embossed concave portion 8 on the back surface 10b side, wrinkling at the time of bonding the decorative sheet 10 can be suppressed. Further, as shown in FIG. 4, for example, such a decorative sheet 10 is bonded to at least one surface of the base material 12 (in FIG. 4, the surface 12a of the base material 12) using an adhesive 11, and It can be used as the plate 13. As the base material 12 used for the decorative board 13, for example, a wood-based MDF, a plywood, or a particle board, and a gypsum board or a metal plate for an inorganic board can be used.

  As described above, the decorative sheet 10 according to the embodiment of the present invention includes the first paper base layer 1 and the second paper base layer 2, and the first paper base layer 1 and the second paper base. A thermoplastic resin layer 3 disposed between the base material layers 2 and bonding the first paper base material layer 1 and the second paper base material layer 2 was provided. Further, a pattern layer 4 formed on the surface 1a side of the first paper base material layer 1 and a surface protection layer 5 formed on the surface 4a side of the pattern layer 4 are provided. A plurality of embossed concave portions 6 are formed on the surface 10a side of the surface protective layer 5, and the maximum depth of the embossed concave portion 6 located at the center of the decorative sheet and the embossed concave portion 6 located at the end of the decorative sheet are determined. The ratio to the maximum depth was in the range of 1.0: 1.1 to 1.1: 1.0. Therefore, the embossed concave portions 6 can be uniformly provided on the entire surface of the decorative sheet 10. For this reason, the uniformity of the tactile sensation can be improved, and the decorative sheet 10 and the decorative plate 13 with further improved characteristics such as the tactile sensation can be provided.

In the decorative sheet 10 according to the embodiment of the present invention, the maximum depth of the embossed concave portion 6 is set to 45 μm. Therefore, a deeper uneven shape can be provided on the decorative sheet 10. Therefore, the design and the tactile sensation can be further improved.
Further, in the decorative sheet 10 according to the embodiment of the present invention, the thicknesses of the first paper base layer 1 and the second paper base layer 2 are respectively 15 μm or more and less than 60 μm. Therefore, it is suitable for printing and post-processing in terms of strength, and the embossability can be improved.
Further, in the decorative sheet 10 according to the embodiment of the present invention, since the thickness of the first paper base layer 1 is larger than the thickness of the second paper base layer 2, the first paper base layer 1 Printability can be improved.

  Furthermore, in the method for manufacturing the decorative sheet 10 according to the embodiment of the present invention, the laminate 7 including the first paper base layer 1, the pattern layer 4 and the surface protection layer 5, and the second paper base layer 2 In between, the decorative sheet 10 sandwiching the thermoplastic resin layer 3 of the molten resin extruded from the T-die 20 is passed between the first press roll 22 and the second press roll 23 to be laminated. The body 7 and the second paper base layer 2 are bonded via the thermoplastic resin layer 3. Then, using one or both of the first press roll 22 and the second press roll 23 using an emboss roll having a convex portion formed on the outer peripheral surface, the decorative sheet 10 is formed by the first press roll 22 and the second press roll 23. When passing between the press rolls 23, a plurality of embossed concave portions 6 are provided on the surface 10a of the decorative sheet 10 on which the surface protective layer 5 is formed. Therefore, it is possible to provide the decorative sheet 10 with a deep uneven shape, and it is possible to provide a decorative sheet with further improved design and tactile sensation.

Also, for example, unlike the method of heating the decorative sheet 10 to re-melt the thermoplastic resin layer 3 and then embossing the decorative sheet 10, it prevents uneven melting of the thermoplastic resin layer 3 due to heat unevenness. As a result, the embossed concave portions 6 can be uniformly provided on the entire surface of the decorative sheet 10.
Furthermore, since the bonding of the laminate 7 and the second paper base layer 2 and the embossing of the decorative sheet 10 can be performed at one time, the number of production steps can be reduced, and the yield can be further improved.

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. However, the present invention is not limited only to these examples.
(Examples 1 to 9, Comparative Example 1)
As shown in Table 1, the thickness of the first paper base layer 1, the thickness of the second paper base layer 2, the total thickness of the sheet without the embossed recess 6, and the emboss pressure were set. The decorative sheets 10 of Examples 1 to 8 and Comparative Example 1 were produced. At that time, in Examples 1 to 7, when the first paper base layer 1 and the second paper base layer 2 are bonded via the thermoplastic resin layer 3, at least one of the press rolls (the first Using an embossing roll as the press roll 22), the decorative sheet 10 was embossed. On the other hand, in Comparative Example 1, the decorative sheet 10 was embossed using an emboss roll after the first paper base layer 1 and the second paper base layer 2 were bonded with the thermoplastic resin layer 3. .

  In the items of design, tactile sensation, and uniformity of tactile sensation in Table 1, evaluations were made by visual and tactile sensations. , "OK". "Excellent" and "Good" were accepted, and "OK" was rejected. In the item of embossing in Table 1, the case where embossing was easy was evaluated as “good”, and the case where embossing was not easy but possible was evaluated as “acceptable”. Furthermore, in the item of the laminate in Table 1, the case where the decorative plate 13 having the good concavo-convex design property was able to be produced was defined as “good”.

As is clear from Table 1 above, as with the decorative sheets 10 of Examples 1 to 9, the maximum depth of the embossed concave portion 6 located at the center of the decorative sheet 10 and the embossed position located at the end of the decorative sheet 10 If the ratio of the concave portion 6 to the maximum depth is in the range of 1.0: 1.1 to 1.1: 1.0, the uniformity of the tactile sensation is higher than that of the out of range as in Comparative Example 1. It was confirmed that it became higher.
Further, as in the decorative sheets 10 of Examples 1 to 7 and 9, if the maximum depth of the embossed concave portion 6 on the surface 10a side of the surface protective layer 5 is 45 μm or more, as in Comparative Example 1, the embossed concave portion 6 It was confirmed that the design and the tactile sensation were higher than those having a maximum depth of less than 45 μm.
Furthermore, as in the decorative sheet 10 of Examples 1 to 7 and 9, if the thickness of the first paper base layer 1 and the second paper base layer is within the range of 15 μm or more and less than 60 μm. In addition, it was confirmed that the design and the tactile sensation were high and the embossing suitability was high, as compared with those out of the range as in Example 8.

Moreover, as in the decorative sheet 10 of Examples 1 to 8, if the thickness of the first paper base layer 1 is larger than the thickness of the second paper base layer 2, the thickness is increased as in Example 9. It was confirmed that the design and the tactile sensation were higher and the printing was performed appropriately, and that the printability of the first paper base material layer 1 was higher than that of the first paper base layer.
When the first paper base layer 1 and the second paper base layer 2 are bonded via the thermoplastic resin layer 3 as in the decorative sheet 10 of Examples 1 to 9, the first press is performed. According to the method using an embossing roll as the roll 22, the first paper base layer 1 and the second paper base layer 2 are bonded with the thermoplastic resin layer 3 as in the decorative sheet 10 of Comparative Example 1. After that, it was confirmed that the uniformity of the tactile sensation was enhanced as compared with the method of embossing the decorative sheet 10 using an embossing roll. In addition, it was confirmed that the embossed laminate was good.

  DESCRIPTION OF SYMBOLS 1 ... 1st paper base layer, 1a ... surface, 2 ... 2nd paper base layer, 3 ... thermoplastic resin layer, 4 ... picture pattern layer, 4a ... surface, 5 ... surface protective layer, 5a ... particle 6, embossed concave portions, 7: laminated body, 8: embossed concave portions, 9: matte layer, 10: decorative sheet, 10a: front surface, 10b: back surface, 11: adhesive, 12: base material, 12a: front surface, 13 ... decorative plate, 20 ... T die, 21 ... bonding device, 22 ... first press roll, 23 ... second press roll, 24 ... drive roll, 25 ... back roll, 26 ... peeling roll, 27 ... Teflon tape

Claims (6)

A first paper base layer and a second paper base layer;
A thermoplastic resin layer disposed between the first paper base layer and the second paper base layer and bonding the first paper base layer and the second paper base layer;
A picture pattern layer formed on the surface side of the first paper base material layer,
A surface protection layer formed on the surface side of the picture pattern layer,
On the surface side of the surface protective layer, a plurality of embossed concave portions are formed,
The ratio of the maximum depth of the embossed recess located at the center of the decorative sheet to the maximum depth of the embossed recess located at the end of the decorative sheet is 1.0: 1.1 to 1.1: 1.0. A decorative sheet, characterized in that:   The decorative sheet according to claim 1, wherein a maximum depth of the embossed concave portion is 45 µm or more.   3. The decorative sheet according to claim 1, wherein each of the first paper base layer and the second paper base layer has a thickness of 15 μm or more and less than 60 μm. 4.   The decorative sheet according to any one of claims 1 to 3, wherein the thickness of the first paper base layer is larger than the thickness of the second paper base layer. A decorative sheet according to any one of claims 1 to 4,
A decorative sheet, comprising: a base material having a decorative sheet attached to at least one surface. A makeup comprising a thermoplastic resin layer of a molten resin extruded from a T-die interposed between a laminate of a first paper base material, a pattern layer and a surface protection layer, and a second paper base layer. Production of the decorative sheet in which a sheet is passed between a first press roll and a second press roll, and the laminate and the second paper base layer are bonded through the thermoplastic resin layer. The method,
One or both of the first press roll and the second press roll use an emboss roll having a convex portion formed on an outer peripheral surface, and the decorative sheet is formed of the first press roll and the second press. A method of manufacturing a decorative sheet, wherein a plurality of embossed concave portions are provided on a surface of the decorative sheet on which the surface protective layer is formed when passing between rolls.

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