JP6536549B2 - Decorative sheet and decorative board provided with the decorative sheet - Google Patents

Description

  The present invention relates to a decorative sheet and a decorative board provided with the decorative sheet, and more specifically, to a decorative sheet which is subjected to pattern printing used for surface decoration of general interior materials and assembled furniture, etc. It relates to a cosmetic version equipped with a sheet.

  As a decorative sheet, a thermoplastic resin film is used as a base material to which printing is applied, and processing such as lamination of a transparent film and embossing to enhance designability and durability is put to practical use and widely used. It is done.

  On the other hand, those printed using paper as a base material may be used as a decorative sheet or a decorative paper. In this case, there is known a method of printing on a base paper, impregnating it with a thermosetting resin, and applying heat and pressure with a press to make a decorative board. By having the thermosetting resin on the surface, it is possible to obtain a decorative board (or a decorative sheet) having high surface hardness and wear resistance.

  Patent Document 1 discloses an example of a decorative sheet using such a paper as a substrate. In the decorative sheet described in Patent Document 1, an extrusion layer made of a thermoplastic resin is provided between two sheets of paper (base paper) to bond the two sheets of paper together.

Patent H8-132582

  However, in the case of the decorative sheet described in Patent Document 1, since two thin sheets of paper are adhered via an extrusion coating layer made of a thermoplastic resin, the tensile strength of these paper substrates becomes large and tearing of the paper is prevented. Although it becomes easy, the designability of the decorative sheet is not sufficiently improved by making the embossing deep, and a further improvement of the designability has been desired.

  So, in this invention, it aims at providing the decorative sheet which further improved the designability, and the decorative board provided with the said decorative sheet.

  In order to solve the above-mentioned subject, the decorative sheet concerning the present invention is arranged between the 1st and 2nd paper base layer and the 1st and 2nd paper base layer, and the 1st and 2nd paper base is arranged. A decorative sheet provided with a thermoplastic resin layer for adhering a material layer, and a pattern layer formed on the first paper base layer, and a plurality of the decorative sheet on the surface side on which the pattern layer is formed The embossed recesses are formed, and the maximum depth of the plurality of embossed recesses is 15% or more of the total thickness before embossing of the decorative sheet.

  In this decorative sheet, the maximum depth of the plurality of embossed recesses is 15% or more with respect to the total thickness before embossing of the decorative sheet. For this reason, a deeper uneven | corrugated shape will be provided in the surface side of a decorative sheet, and it becomes possible to improve designability more.

  In the above decorative sheet, the maximum depth of the embossed recess is preferably 30 μm or more. In this case, the design of the decorative sheet can be made quite good, and the embossing can be made good.

  In the above decorative sheet, the thickness of the paper material used for the first and second paper base layers is preferably 15 μm or more and less than 60 μm. When the thickness of the paper material is 60 μm or more, it may be difficult to properly emboss the decorative sheet, and it becomes difficult to obtain a decorative sheet having high designability. On the other hand, when the thickness of the paper material is smaller than 15 μm, the paper material may be easily broken or the like when embossing.

  In the above decorative sheet, it is preferable that the thickness of the thermoplastic resin layer is 20 μm or more and 70 μm or less, and is thicker than the paper material used for the second paper base layer. Thus, when the thermoplastic resin layer has a thickness of 20 μm or more, when the embossing is performed, the embossed recess can be more surely formed on the decorative sheet, and the designability can be enhanced, and the laminating process is performed on the decorative sheet. Even if the like is applied, it is possible to suppress that the formed embossed shape returns to the original state.

  In the above decorative sheet, it is preferable that the thickness of the paper used for the first paper base layer located on the front surface side of the decorative sheet is thicker than the thickness of the paper used for the second paper base layer. In this case, it is possible to make printing easier (the printability is better).

  In the above-described decorative sheet, it is preferable that a plurality of concave portions be formed on the back surface side of the decorative sheet which is opposite to the surface side in the laminating method. In this case, when the decorative sheet is adhered to a base material or the like, the adhesiveness of the decorative sheet can be improved by the adhesive getting into the recess. As a result, it is also possible to reduce the amount of adhesive used. Moreover, the wrinkles at the time of bonding a decorative sheet can also be suppressed by providing a recessed part in a back surface side.

  Moreover, in said decorative sheet, the some recessed part may be formed so that the position in the lamination direction may differ from the location in which the embossing recessed part is formed.

  The present invention can also be grasped as an invention of a decorative board provided with a decorative sheet having any of the configurations described above, and a base material having the decorative sheet attached to at least one surface. According to this decorative plate, as with the decorative sheet, the above-described effects can be exhibited.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to obtain the decorative sheet which further improved the designability, and the decorative board provided with the said decorative sheet.

It is a typical sectional view showing the section composition of the decorative sheet concerning the present invention. It is sectional drawing which shows the various thickness in the decorative sheet which concerns on this invention.

  Hereinafter, the decorative sheet and the decorative plate according to the present invention will be described in detail with reference to the drawings. In the description, the same reference numeral may be used for the same element or an element having the same function, and the overlapping description will be omitted.

  FIG. 1 is a schematic cross-sectional view showing the cross-sectional configuration of the decorative sheet according to the present invention. As shown in FIG. 1, the decorative sheet 10 includes a first paper base layer 1, a second paper base layer 2, a thermoplastic resin layer 3, and a pattern print layer 4 (pattern layer). It is configured to be equipped. The first and second paper base layers 1 and 2 are adhered and fixed to each other via the thermoplastic resin layer 3 disposed therebetween. The decorative sheet 10 is embossed on the surface 10a, and a plurality of embossed recesses 5 are formed on the surface 10a. Each embossed recess 5 is formed, for example, in the shape of a groove extending in the longitudinal direction along a grain or the like of a picture. Moreover, as for the decorative sheet 10, the some recessed part 6 is formed also in the back surface 10b. Each recess 6 is also formed, for example, in the form of a groove extending in the longitudinal direction, similarly to the embossed recess 5. The concave portion 6 on the back surface 10b side is preferably formed to be shifted so that the position in the stacking direction is different from the portion where the embossed concave portion 5 on the front surface 10a side is formed. May be formed to be the same in the stacking direction.

  The decorative sheet 10 made of such a laminated body can be provided with irregularities on both surfaces 10a and 10b by being heated to a predetermined temperature and allowed to pass through an embossing unit consisting of an embossing roll and a rubber back roll. It has become. In the decorative sheet 10, by heating, the laminate can be provided with plasticity, and by the presence of the thermoplastic resin layer 3, the tensile strength is also increased, and the embossability can be improved.

  As the first and second paper base layers 1, 2, for example, various paper materials containing 50% or more of cellulose fibers can be used. For example, the thickness of the paper material constituting the first and second paper base layers 1 and 2 is preferably 15 μm or more and less than 60 μm, and more preferably 25 μm or more and 35 μm or less. When the paper material used for the first and second paper base layers 1 and 2 is thinner than 15 μm, the strength becomes unsuitable in printing and post-processing, while when the paper material is 60 μm or more, the embossing property is May be difficult to emboss, or it may be difficult to emboss deep.

  Further, as the thickness of the paper material constituting the first and second paper base layers 1, 2, the thickness of each of the paper materials used for the first and second paper base layers 1, 2 is the same as each other 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 It may be set to be thinner than the paper material of the first paper base layer 1, or vice versa. However, when the paper material of the second paper base material layer 2 is made thinner, damage and the like of the paper material on the surface 10 a side to which the embossing process is applied is suppressed, and the paper material is made thinner. Since it is possible to make the total thickness of the entire decorative sheet 10 thinner, the thickness of the paper of the second paper base layer 2 is made thinner than the thickness of the paper of the first paper base layer 1 It is preferable to keep the The paper material constituting the first paper base layer 1 is thicker than the paper material constituting the second paper base layer 2 in this manner. Printing becomes easy (printability improves).

  The thermoplastic resin layer 3 is a layer which is laminated between the first and second paper base layers 1 and 2 and adheres the first and second paper base layers 1 and 2 to each other, and Also, it is a layer for holding and fixing its shape when it is embossed. Although the thickness of the thermoplastic resin layer 3 is not limited, it is preferably, for example, 20 μm to 70 μm, and more preferably 45 μm to 55 μm. Further, the thickness of the thermoplastic resin layer 3 is preferably thicker than the paper material constituting the first and second paper base layers 1 and 2, and in particular, the paper constituting the second paper base layer 2 It is preferable that the material is thicker than the material, that is, the paper material of the second paper base layer 2 is thinner than the thermoplastic resin layer 3. In order to provide such a thermoplastic resin layer 3, it is possible to form a thermoplastic resin layer using, for example, an extruder and bond the first and second paper base layers 1 and 2 together.

  It is preferable to use, for example, a thermoplastic resin having a melting point of 100 ° C. to 200 ° C., for example, polyvinyl chloride, polyvinylidene fluoride, nylon 12, polyamide, polyvinyl alcohol, as the thermoplastic resin constituting the thermoplastic resin layer 3. , Polystyrene, styrene / acrylonitrile copolymer, styrene / butadiene / acrylonitrile copolymer, high density polyethylene, medium density polyethylene, low density polyethylene, polypropylene, ethylene / vinyl acetate copolymer, polyacetal, polymethyl methacrylate, modified acrylic And polycarbonate, polyacetal, nitrocellulose, cellulose propionate, ethyl cellulose, cellulose acetate, polyurethane and the like.

  By setting the melting point of the resin constituting the thermoplastic resin layer 3 in the range of 100 ° C. to 200 ° C., embossing can be performed without causing thermal deterioration of the paper and without impairing productivity such as line speed. . The resin used for the thermoplastic resin layer 3 can be appropriately selected in consideration of the melting point, but in consideration of the resin price and the fluidity upon melting, for example, high density polyethylene, medium density polyethylene, low density polyethylene, etc. It is preferable to use

  The picture print layer 4 is a layer for giving a picture etc. to the decorative sheet 10, and is made of, for example, ink. As a pattern, for example, wood grain etc. are illustrated. A known printing method or printing apparatus can be used as a printing method of providing such a pattern printing layer 4. Although 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 print layer 4 is not particularly limited, and an aqueous ink or a solvent type ink can be used, and the compatibility with the device, the performance required for the decorative sheet, and the decorative plate can be obtained. It can be selected appropriately in consideration. In the case of a decorative sheet or a decorative plate, it is generally preferable to use a pigment type colorant in consideration of light resistance in the case of a decorative sheet or a decorative plate.

  It is also possible to further provide a transparent resin coat layer (not shown) on the picture print layer 4. By providing the coat layer of the transparent resin, it is possible to adjust the gloss of the surface 10 a of the decorative sheet 10 and obtain a preferable design. In addition, by providing the coating layer, it is possible to improve surface physical properties such as abrasion resistance in the decorative sheet 10. In addition, when providing a coating layer, for example, a difference in gloss may be partially provided as in the case of wood grain to create a sense of unevenness visually, and combine it with the unevenness by embossing to express a higher design property Is also possible.

  The coating layer may be provided by using a known coating apparatus or by coating using a gravure printing apparatus. Although it does not specifically limit as a transparent resin which comprises a coating layer, For example, what disperse | distributed the silica for gloss adjustment to the urethane resin of 2 liquid curing type can be used.

  Here, a method of embossing the laminate including the first and second paper base layers 1 and 2 adhered to each other by the thermoplastic resin layer 3 will be described with reference to FIG. In addition, since the conventional method can be used about the method to adhere | attach the paper material which comprises the 1st and 2nd paper base material layers 1 and 2 by the thermoplastic resin layer 3, the description is abbreviate | omitted.

  First, as shown to (a) of FIG. 2, the laminated body 100 in which the 2nd paper base material layer 2, the thermoplastic resin layer 3, the 1st paper base material layer 1, and the pattern printing layer 4 were laminated | stacked in this order. Prepare. The total thickness D of the laminate 100 is, for example, 60 μm to 160 μm, and more preferably 80 μm to 120 μm. In addition, when forming the laminated body 100, in order to laminate | stack by applying heat and pressure, the thickness of the paper material etc. which comprise the 1st and 2nd paper base material layers 1 and 2 is shrunk to some extent. Then, the laminate 100 is embossed using an embossing device. The emboss device used here has, for example, a device for heating the laminate 100, and then is inserted into an emboss unit consisting of an emboss roll and a rubber back roll having irregularities on the surface and the laminate 100 shown in FIG. Embossed as shown in (b). By heating the laminated body 100, the thermoplastic resin layer 3 is softened to facilitate embossing on the surface 100a, and heat is generated between the paper materials constituting the first and second paper base layers 1 and 2 The plastic resin layer 3 is located, and the tensile strength of the laminate is increased, so that it is possible to obtain an effect such as breakage becomes difficult.

  Embossing is performed using, for example, one having a depth of 15 μm or more. This is because the emboss has a sense of asperity in design and can be effectively sensed visually because D1 (difference in height) of the embossed recess 5 is 15 μm or more in the finished decorative sheet or plate.

  The rubber back roll used in the present embodiment preferably has a hardness of 50 ° to 80 °, more preferably 50 °, but is not limited. The hardness is measured, for example, according to JIS 6301 A type. In the present embodiment, preferably, a rubber back roll having a hardness of 50 ° is preferably used. When a rubber back roll having a hardness of 90 ° is used, the embossed design may be inferior.

  Embossing is performed using the embossing apparatus provided with the above structures, and the laminated body by which the unevenness | corrugation was provided on the surface of a decorative sheet can be obtained, and it becomes possible to obtain the decorative sheet 10 by this. Further, since the hardness of the rubber back roll used in the present embodiment is lower than usual, the embossed recess 5 is formed on the surface 100 a side by the embossing roll, and at the same time, the rubber back roll and the embossing roll By sandwiching, concave portions 6 having a predetermined depth are alternately formed on the back surface 100 b side. In the manufacturing method described above, the embossed recesses 5 and the recesses 6 are formed substantially simultaneously on the both surfaces 100a and 100b of the laminate 100, but the embossed recesses 5 and the recesses 6 are respectively formed using the embossing apparatus. Of course, the recess 6 may be provided separately.

  Next, the relationship between the total thickness D of the decorative sheet 10 (laminated body 100) before embossing and the depth D1 (also referred to as the maximum depth) of the embossed recess 5 on the surface 10a side will be described.

  In the decorative sheet 10 according to the present embodiment, since the above-described embossing method is employed, the decorative sheet 10 can be embossed deeper than conventional. Therefore, in the decorative sheet 10 according to the present embodiment, the depth D1 of the embossed recess 5 is 15% or more of the total thickness D before embossing of the decorative sheet 10, more preferably The depth D1 of the embossed recess 5 is more than 10% and not more than 200% of the total thickness D of the decorative sheet 10 before embossing. Since the embossed recess 5 is such a deep recess (groove), the design of the decorative sheet 10, for example, a more natural woodgrained sheet can be obtained. Specifically, the depth D1 of the embossed recess 5 is, for example, 15 μm or more, and more preferably 30 μm to 200 μm.

  The decorative sheet 10 is also provided with a plurality of groove-shaped recesses 6 on the back surface 10 b side, that is, the side on which the decorative sheet 10 is attached to a base material or the like. For this reason, it is possible to easily increase the adhesion strength to the base material and the like. Moreover, the wrinkles at the time of bonding a decorative sheet can also be suppressed by providing the recessed part 6 in a back surface side.

  Further, by increasing the correlation peel strength between the paper material constituting the first paper base layer 1 or the second paper base layer 2 and the thermoplastic resin layer 3 by reheating the thermoplastic resin at the time of embossing. Is possible. For example, after fixing a decorative sheet of 25 mm in width to a substrate of MDF with a thickness of 3 mm with double-sided tape (double-sided tape # 5760 manufactured by Sekisui Chemical Co., Ltd.), the tensile speed is measured with a tensile tester (RTM-100 made by Orientec) When it carries out and evaluates by 180 degree tension by 200 mm / min, it becomes possible to make peeling strength (correlated peeling strength) 1.8 N / 25 mm or more, more preferably 2.3 N / 25 mm or more.

  In addition, it is also possible to bond such a decorative sheet 10 to one side of a base material using, for example, an adhesive and use it as a decorative material. As a base material used for a decorative material, MDF and plywood of a wood type | system | group, a gypsum board, a metal plate etc. can be used if it is an inorganic type, for example.

  Hereinafter, the present invention will be more specifically described using examples and comparative examples. However, the present invention is not limited to only these examples.

Example 1
A decorative sheet was made according to the following materials and procedures, and a decorative board was produced using it.
(1) A mixed paper with a basis weight of 23 g / m ² (thickness 33 μm) (TP23 manufactured by Tenma Special Paper Co., Ltd.) is prepared as a first paper base, and on its surface, a nitrifying cotton ink (PCNT manufactured by Toyo Ink Co., Ltd.) The pattern was printed using an ink) and a Toyo Ink urethane ink (PCRNT ink). Thereafter, a transparent surface protection coat in which an isocyanate curing agent was added to the main component composed mainly of an acrylic polyol was applied on the printing surface at a dry weight of 7 g / m ² to prepare a paper base for a decorative sheet.
(2) The paper base on which the above-mentioned pattern printing has been applied is subjected to curing at 60 ° C. for 48 hours to accelerate the curing reaction of the surface protective layer, and then the side on which the paper base is not printed A high-density polyethylene that has been heated to 300 ° C. and thermally melted is extruded into a film shape between mixed paper of 23 g / m ² (30 μm thickness) basis weight which is the second paper base (Heiji W, Ltd. FIXW 23) By pressure bonding and immediately cooling, a laminate having the first and second paper base layers on the front and back of the polyethylene layer was obtained. The thickness of the polyethylene layer was 50 μm, and the total thickness D of the laminate was 101 μm.
(3) The surface temperature of the printed pattern surface of the obtained laminate is heated to 130 ° C. close to the melting point of polyethylene, and an embossed plate with a maximum depth of 150 μm created by the corrosion method and a hardness meter according to JIS K6301: 1975 Between the rubber roll having a hardness of HS (Hardness spring) of 50 °, the laminate is placed on both the front and back sides to provide an asperity shape, and by cooling the laminate immediately thereafter, a decorative sheet having the asperity shape It was created. The depth D1 of the embossed recess on the surface side of the decorative sheet obtained has a height difference of up to 100 μm, and the ratio of the depth D1 to the total thickness D before embossing is 99%. A good design was confirmed as a decorative sheet. Also, embossing could be easily performed. In addition, the height difference (depth) of the embossing depth D1 measured the maximum height (Rmax) with the surface roughness shape measuring instrument (Tokyo Seimitsu make Surfcom 120A).
(4) 55 g / m ^{2 of} coating liquid weight is applied to the 2.5 mm thick MDF (medium density fiber) substrate of the decorative sheet having the uneven shape thus obtained, with 1 part ethylene glycol vinyl acetate adhesive, By pasting through a laminating roll whose surface temperature was heated to 100 ° C., a decorative board having an uneven shape was produced. The embossed recesses of the obtained decorative plate had a depth of at most 59 μm, and it was possible to produce a decorative plate having a good asperity design.

Example 2
A decorative sheet was produced according to the following materials and procedures, and a decorative board using it was produced.
(1) (2) A laminated body was prepared using the same materials and procedures as in Example 1 except that a 52-μm-thick mixed paper (HP 45 manufactured by Tenma Special Paper Co., Ltd.) was used as the first paper base. Made. The total thickness D of the laminate was 117 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. The depth D1 of the embossed recess of the obtained decorative sheet has a height difference of at most 70 μm, and the ratio of the depth D1 to the total thickness D before embossing is 60%, and the decorative sheet Good design was confirmed. Also, embossing could be easily performed. (4) A decorative board was prepared using the same materials and procedures as in Example 1. As a result, it was possible to create a decorative board having good concavo-convex design.

Example 3
A decorative sheet was produced according to the following materials and procedures, and a decorative board using it was produced.
(1) (2) A laminated body was prepared using the same materials and procedures as in Example 2 except that a mixed paper having a thickness of 55 μm (HPS 45 manufactured by Tenma Special Paper Co., Ltd.) was used as the second paper base. Made. The total thickness D of the laminate was 140 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. The depth D1 of the embossed recess of the obtained decorative sheet has a height difference of at most 21 μm, and the ratio of the depth D1 to the total thickness D before embossing is 15%, and the decorative sheet There was no problem at the design level. Also, embossing could be easily performed.
(4) A decorative board was produced using the same materials and procedures as in Example 1. As a result, it was possible to produce a decorative board having good asperity design properties.

Example 4
A decorative sheet was produced with the following materials and procedures.
(1) (2) A laminate was produced in the same manner as in Example 1 except that the thickness of high-density polyethylene used for the thermoplastic resin layer was 18 μm. The total thickness D of the laminate was 72 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. The depth D1 of the embossed recess of the obtained decorative sheet has a maximum difference of 72 μm, and the ratio of the depth D1 to the total thickness D before embossing is 100%, and the decorative sheet Good design was confirmed. Also, embossing could be easily performed.
(4) However, since the thickness of the thermoplastic resin layer was thin, it was not produced as a decorative board.

Example 5
A decorative sheet was produced according to the following materials and procedures, and a decorative board using it was produced.
(1) (2) A laminate was produced in the same manner as in Example 1 except that the thickness of the high density polyethylene used for the thermoplastic resin layer was 90 μm. The total thickness D of the laminate was 136 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. The depth D1 of the embossed recess of the obtained decorative sheet has a height difference of at most 140 μm, and the ratio of the depth D1 to the total thickness D before embossing is 103%, and the decorative sheet Good design was confirmed. Also, embossing could be easily performed.
(4) A decorative board was prepared using the same materials and procedures as in Example 1. As a result, it was possible to create a decorative board having good concavo-convex design.

Example 6
A decorative sheet was produced according to the following materials and procedures, and a decorative board using it was produced.
(1) (2) A laminate was produced in the same manner as in Example 1 except that the thickness of the high-density polyethylene used for the thermoplastic resin layer was 105 μm. The total thickness D of the laminate was 150 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. The depth D1 of the embossed recess of the obtained decorative sheet has a difference of up to 148 μm in height, and the ratio of the depth D1 to the total thickness D before embossing is 99%, and the decorative sheet Good design was confirmed. Also, embossing could be easily performed.
(4) A decorative board was prepared using the same materials and procedures as in Example 1. As a result, it was possible to create a decorative board having good concavo-convex design.

Example 7
A decorative sheet was produced with the following materials and procedures.
(1) (2) A laminate was produced using the same materials and procedures as in Example 1 except that mixed paper with a thickness of 50 μm was used as the first paper base. The total thickness D of the laminate was 116 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. However, the hardness of the rubber roll used for embossing was HS 80 °. The depth D1 of the embossed recess of the obtained decorative sheet has a difference of up to 17 μm in height, and the ratio of the depth D1 to the total thickness D before embossing is 15%, and the decorative sheet There was no problem at the design level. In addition, embossing could also be performed.
(4) However, it was not produced as a decorative board.

Example 8
A decorative sheet was produced according to the following materials and procedures, and a decorative board using it was produced.
(1) (2) A laminate was produced in the same materials and procedures as in Example 1. The total thickness D of the laminate was 101 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 7. That is, the hardness of the rubber roll used for embossing was HS 80 °. The depth D1 of the embossed recess of the obtained decorative sheet has a height difference of at most 29 μm, and the ratio of the depth D1 to the total thickness D before embossing is 28%, and the decorative sheet There was no problem at the design level. In addition, embossing could also be performed.
(4) A decorative board was prepared using the same materials and procedures as in Example 1. As a result, it was possible to create a decorative board having good concavo-convex design.

Example 9
A decorative sheet was produced with the following materials and procedures.
(1) (2) A laminate was produced in the same materials and procedures as in Example 1. The total thickness D of the laminate was 101 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. However, the hardness of the rubber roll used for embossing was HS 90 °. The depth D1 of the embossed recess of the obtained decorative sheet has a maximum difference of 21 μm, and the ratio of the depth D1 to the total thickness D before embossing is 21%, and the decorative sheet There was no problem at the design level. In addition, embossing could also be performed.
(4) However, it was not produced as a decorative board.

Comparative Example 1
A decorative sheet was produced with the following materials and procedures.
(1) (2) A 60 μm thick mixed paper (HC50 manufactured by Tenma Special Paper Co., Ltd.) as the first paper base, and a 60 μm thick mixed paper as the second paper base A laminate was produced in the same manner as in Example 1 except that (HC50 manufactured by Oji Paper Co., Ltd.) was used. The total thickness D of the laminate was 151 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. The depth D1 of the embossed recess of the obtained decorative sheet has a height difference of at most 10 μm, and the ratio of the depth D1 to the total thickness D before embossing is 6%, and the decorative sheet As a result, it was not possible to confirm good design. In addition, embossing was easy.
(4) However, it was not produced as a decorative board.

Comparative Example 2
A decorative sheet was produced with the following materials and procedures.
(1) (2) A laminate was produced in the same materials and procedures as in Example 2. The total thickness D of the laminate was 117 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Example 1. However, the hardness of the rubber roll used for embossing was HS 90 °. The depth D1 of the embossed recess of the obtained decorative sheet has a difference of up to 12 μm, and the ratio of the depth D1 to the total thickness D before embossing is 10%, and the decorative sheet As a result, it was not possible to confirm good design. In addition, embossing was easy.
(4) However, it was not produced as a decorative board.

Comparative Example 3
A decorative sheet was produced with the following materials and procedures.
(1) (2) A laminate was produced in the same materials and procedures as in Example 3. The total thickness D of the laminate was 140 μm.
(3) The laminate produced in this manner was embossed in the same manner as in Comparative Example 2. That is, the hardness of the rubber roll used for embossing was HS 90 °. The depth D1 of the embossed recess of the obtained decorative sheet has a difference of up to 5 μm in height, and the ratio of the depth D1 to the total thickness D before embossing is 4%, and the decorative sheet As a result, it was not possible to confirm good design. In addition, embossing was easy.
(4) However, it was not produced as a decorative board.

Table 1 below shows a summary of Examples 1 to 9 and Comparative Examples 1 to 3 described above.

  As apparent from Table 1 above, it is possible to obtain a decorative sheet having a thickness ratio of 15% or more, more preferably 30% or more (or 30 μm or more) embossed depth, and a decorative board provided with the decorative sheet. According to these, it has been confirmed that the design can be enhanced.

  DESCRIPTION OF SYMBOLS 1 ... 1st paper base material layer, 2 ... 2nd paper base material layer, 3 ... Thermoplastic resin layer, 4 ... Pattern printing layer (pattern layer), 5 ... Embossed recessed part, 6 ... recessed part, 10 ... Decorative sheet 10a: surface, 10b: back surface, 100: laminate, 100a: surface, 100b: back surface, D: total thickness before embossing of the decorative sheet, D1: depth of embossed recess.

Claims (7)

A thermoplastic resin layer disposed between the first and second paper base layers, the first and second paper base layers, and adhering the first and second paper base layers; It is a decorative sheet provided with the pattern layer formed on the paper base material layer of 1.
On the surface side of the decorative sheet on which the pattern layer is formed, a plurality of embossed recesses are formed so as to enter the first paper base layer, and the maximum depth of the plurality of embossed recesses is that of the decorative sheet. 15% or more of the total thickness before embossing ,
A decorative sheet characterized in that the thickness of the thermoplastic resin layer is 20 μm or more and 70 μm or less and is thicker than the paper material used for the second paper base layer .   The maximum depth of the said embossing recessed part is 30 micrometers or more, The decorative sheet of Claim 1 characterized by the above-mentioned.   The thickness of the paper material used for the said 1st and 2nd paper base material layer is 15 micrometers or more and less than 60 micrometers, The decorative sheet of Claim 1 or 2 characterized by the above-mentioned. The thickness of the paper used for the first paper base layer located on the front side of the decorative sheet is thicker than the thickness of the paper used for the second paper base layer. The decorative sheet as described in any one of 1-3 . The some recessed part is formed in the back surface side of the said decorative sheet, The decorative sheet as described in any one of Claims 1-4 characterized by the above-mentioned. The decorative sheet according to claim 5 , wherein the plurality of concave portions are formed so as to be different in position in the stacking direction from the portion where the embossed concave portions are formed. A decorative sheet according to any one of claims 1 to 6 ,
A decorative board comprising: a base material in which the decorative sheet is bonded to at least one surface.

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