JP2005307582A - Decorative sheet, method of producing the same, and floor material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet which ensures sufficient decorative appearance of joint-like grooves, that is comparable to the decorative appearance of a conventional wooden flooring material, and is stably produceable, and to provide a method of producing the dressing sheet, and a floor material using the dressing sheet. <P>SOLUTION: The dressing sheet 1 is produced by forming patterned grooves inclusive of at least the joint-like grooves 126 in a longitudinal direction and a direction B orthogonal to the same, in a surface of a long sheet substrate 11, and filling a coloring agent 13 in the patterned grooves. Herein a depth of the joint-like grooves 12b in the longitudinal direction and the direction B orthogonal to the same is set to 50 to 80 μm, and an opening width of the same is set to 0.7 to 1.2 mm. Thus when the coloring agent 13 is filled in the patterned grooves in the longitudinal direction A according to a wiping method, the coloring agent 13 can be also sufficiently filled in the joint-like grooves 12b in the direction B orthogonal to the longitudinal direction. Further the joint-like grooves in the direction B have sufficient width, and therefore the entire patterned grooves stably exhibit sufficient decorative appearance as the joint-like grooves. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a decorative sheet suitable for surface decoration of interior flooring in a building such as a house, a manufacturing method thereof, and a flooring using the decorative sheet.

  Conventionally, as a flooring material for interiors in a building such as a house, a veneer is pasted on the surface of a base material such as a plywood, and a groove is formed on the surface by jointing grooves vertically and horizontally by a woodworking machine. A so-called woody flooring material in which a surface protective layer is formed on the entire surface with an ultraviolet curable paint after coloring with a colored paint is most common. However, since this veneer is made of a natural material, there is a problem that the color variation of each sheet is large and it is difficult to harmonize the color with walls, ceilings, furniture, and the like.

  As a method that enables mass production of floor materials of the desired color with stable quality, prepare a decorative sheet that has been printed in advance on a synthetic resin film, and place this on the surface of a base material such as plywood. A method of sticking has also been proposed (Patent Document 1). After sticking the decorative sheet, a groove material simulating the joint of the wooden flooring material is applied, and the groove is colored with a colored paint to obtain a flooring material having a design feeling similar to that of the wooden flooring material. However, this method has a drawback that the manufacturing process is complicated and productivity is low, and the base material such as plywood is exposed at the joint formed by grooving, so that the water resistance of the joint is inferior. Therefore, a method of preparing a decorative sheet (Patent Document 2) whose surface has been previously embossed or wiped is also conceivable. According to this method, the decorative sheet is simply adhered to the surface of the base substrate. Thus, there is an advantage that a flooring material having an excellent design comparable to a wooden flooring material and excellent in water resistance of joints can be easily obtained.

  However, joints of wooden flooring materials are generally formed not only in the longitudinal direction of the rectangular flooring but also in the direction orthogonal to the longitudinal direction, but embossed and wiping decorative sheets that mimic this are produced. In this case, in the wiping treatment step, it is difficult to fill the joint grooves in the direction perpendicular to the wiping treatment direction (longitudinal direction of the decorative sheet) in a good state, and the design feeling of the joints is insufficient. There was a problem that it was easy to become.

  In order to solve this problem, the inventors of the present invention previously described in Japanese Patent Application No. 2003-401183 can be stably manufactured while ensuring a sufficient design feeling of jointed grooves comparable to conventional woody flooring materials. As a flooring material using the decorative sheet and its manufacturing method and the decorative sheet, a pattern-shaped groove including at least joint grooves in the direction perpendicular to the longitudinal direction is formed on the surface of the long sheet-like base material, Patent application title: Patterned groove is a decorative sheet filled with a colorant, and the joint groove in the direction perpendicular to the longitudinal direction has a depth of 50 to 80 μm and an opening width of 0.7 to 1.2 mm Filed.

However, in the present invention, the size of the opening of the joint groove is limited, and the ink is easily scraped off by wiping. Therefore, it is necessary to reduce the size of the opening. By making the opening portion small, it remains even if it is scraped off by wiping. However, if the opening portion is made large (1.2 mm or more), ink does not remain, and even if ink remains, it is not uniform.
Utility Model Registration No. 3051531 JP-A-8-230113

  The present invention has been made in order to solve the above-mentioned problems, and the object of the present invention is to provide a decorative sheet having a stable and clean ink residue even when the opening is large.

  The present invention solves this problem, that is, the invention according to claim 1 is characterized in that a patterned groove including at least joint grooves in the direction perpendicular to the longitudinal direction is formed on the surface of the long sheet-like substrate, The pattern-like groove is a decorative sheet filled with a colorant, and a fine concavo-convex pattern is applied to the bottom of the joint-like groove at a depth of 5 to 25 μm, and the area of the pattern concave portion is the pattern convex portion. It is a decorative sheet characterized by being wider than the area.

  The invention according to claim 2 is characterized in that the joint grooves in the direction perpendicular to the longitudinal direction have a depth of 40 to 80 μm and an opening width of 0.5 to 3.0 mm. This is a decorative sheet.

  The invention according to claim 3 is a pattern including at least a joint groove having a depth of 40 to 80 μm and an opening width of 0.5 to 3.0 mm in the direction perpendicular to the longitudinal direction on the surface of the long sheet-like substrate. A decorative sheet comprising: a groove-like groove, a fine uneven pattern formed at a depth of 5 to 25 μm at the bottom of the joint-like groove, and the pattern-like groove filled with a colorant by a wiping method. It is a manufacturing method.

  According to a fourth aspect of the present invention, the long sheet-like base material includes a thermoplastic resin layer that is thicker than the pattern-like depth on at least a surface portion, and the pattern-like groove includes the thermoplastic resin layer. 4. The decorative sheet manufacturing method according to claim 3, wherein a cooling embossing roll is pressed against one surface of the molten thermoplastic resin layer during the melt extrusion molding.

  The invention according to claim 5 is a flooring material, wherein the decorative sheet according to claims 1 to 4 is bonded to a base substrate.

  According to the invention of claim 1 of the present invention, by providing a fine uneven pattern at the bottom of the joint groove, the amount of colorant scraped by the penetration of the blade after filling with the colorant by the wiping method is suppressed, and a sufficient concentration It is possible to provide a decorative sheet having sufficient design feeling as a joint in the joint groove in the direction B perpendicular to the longitudinal direction.

  According to the invention described in claim 2 of the present invention, the joint groove 12a in the direction B perpendicular to the longitudinal direction has a depth of 50 to 80 μm and an opening width of 0.7 to 1.2 mm. It is possible to ensure a sufficient width to be recognized as.

  According to the invention described in claim 3 of the present invention, the colorant is filled by the wiping method, so that the colorant uniformly intrudes into necessary portions and unnecessary portions are scraped out. Can be expressed clearly.

  According to the invention of claim 4 of the present invention, at least the surface portion is provided with the thermoplastic resin layer thicker than the pattern-like depth, so that the unevenness due to the processing of the pattern groove does not pass through, and the long sheet Occurrence of unevenness on the back surface of the sheet can be suppressed, and problems such as scraping unevenness and unremaining scraping during wiping can be avoided.

  According to the invention described in claim 5 of the present invention, the interior of the joint groove can be sufficiently colored, and has a sufficient opening width to be recognized as the joint groove, so that the conventional woody flooring It becomes possible to easily and inexpensively obtain a flooring material having a design feeling of joint grooves that is comparable to the material.

FIG. 1 shows an external structure of an embodiment of the decorative sheet of the present invention. FIG. 2 shows a cross-sectional structure of one embodiment of the flooring of the present invention. The longitudinal direction of the decorative sheet 1 is A, and the longitudinal direction and the orthogonal direction are B
And The pattern-like groove 12 has at least joint-like grooves 12b in the direction B, and a fine pattern 4 is provided at the bottom of the pattern-like groove 12 and is filled with a colorant 13.

  The long sheet-like base material 11 in the decorative sheet 1 of the present invention can be made of any material as long as it is a long sheet body capable of forming the patterned groove 12 on the surface. For example, it is paper, a synthetic resin film, a metal foil, or a laminate thereof. Since the formation of the pattern-like grooves 12 is usually performed by an embossing method, it is preferable that at least the surface portion of the long sheet-like base material 11 is made of a thermoplastic resin layer excellent in embossing suitability.

  On the surface of the long sheet-like base material 11, pattern-like grooves 12 including at least joint-like grooves 12 b in the direction B perpendicular to the longitudinal direction are formed. However, the longitudinal direction and the orthogonal direction B referred to here do not necessarily need to be exactly 90 degrees with respect to the longitudinal direction A of the long sheet-like base material 11, and the angle at which the appearance is generally perceived as the orthogonal direction. If so, the design is allowed and there may be an error of about several degrees. Further, the joint grooves 12b in the direction B perpendicular to the longitudinal direction may have a length extending over the entire width of the long sheet-like substrate 11, but correspond to a part of the entire width as shown in FIG. The thing of length may be sufficient and both may be mixed.

  As the pattern-like grooves 12, joint grooves 12a in the longitudinal direction A can be provided in addition to joint grooves 12b in the direction B perpendicular to the longitudinal direction. In general, imitating the design of a conventional woody flooring material, as shown in FIG. 1, a plurality of joint-like grooves 12a continuous in the longitudinal direction A are provided with a predetermined width and adjacent to each other. In many cases, a large number of joint grooves 12b in the direction B perpendicular to the longitudinal direction connecting the joint grooves 12a in the longitudinal direction A are provided in an alternating positional relationship. The cross-sectional shape of these joint grooves 12a and 12b is arbitrary, for example, V-shaped, U-shaped, R-shaped.

  In the present invention, an uneven pattern 15 finer than the joint grooves 12a and 12b is formed on the bottom surface of the joint grooves 12b in the direction B perpendicular to the longitudinal direction. This may be in the form of a grid or a line as shown in FIG.

  The concave portion of the concave / convex pattern 15 is filled with a colorant 13 and colored. As a filling method of the colorant 13, a roll coating method using a ridge roll, an ink jet method, or the like is conceivable. It is preferable to use a so-called wiping method in which after the colorant 13 is applied to the entire surface of the material, the colorant 13 on the surface of the convex portion other than the pattern-like grooves 12 is removed by scraping with a blade.

  A problem in this wiping method is the joint groove 12b in the direction B perpendicular to the longitudinal direction of the long sheet-like substrate 11. That is, since the blade for removing the excessive colorant 13 in the wiping method runs in the longitudinal direction A relative to the long sheet-like base material 11, the joint grooves in the direction B perpendicular to the longitudinal direction. If there is 12b, the blade enters the joint groove 12b and scrapes the colorant 13 applied thereto, so that the joint 13 cannot be sufficiently filled with the colorant 13. There is a case. If the width of the joint groove 12b is extremely narrow, the blade can be prevented from entering, but the design feeling as a joint cannot be obtained.

  Therefore, as a result of intensive studies by the present inventors, by providing a fine uneven pattern at the bottom of the joint groove, the amount of colorant scraped by the penetration of the blade after filling the colorant by the wiping method is suppressed, and a sufficient concentration It is possible to provide a decorative sheet having sufficient design feeling as a joint in the joint groove in the direction B perpendicular to the longitudinal direction.

  The thermoplastic resin layer constituting the surface portion of the long sheet-like substrate 11 is preferably provided at least thicker than the depth (maximum depth) of the patterned groove 12. Otherwise, the unevenness due to the embossing of the pattern-like groove 12 is exposed, and the unevenness is generated on the back surface of the long sheet-like base material 11, resulting in scraping unevenness or unscratch left during the wiping process. Because there are cases.

  As a method of forming the pattern-like grooves 12 in the thermoplastic resin layer, there is a method in which hot-press embossing is performed on the thermoplastic resin layer that has already been formed into a film or a sheet and cooled and solidified. However, according to this method, when the convex portion of the embossed plate is pushed into the resin layer, the resin is pushed on both sides of the convex portion, so that a raised portion is likely to occur in the contour portion of the pattern-like groove 12. The raised portion is liable to cause scraping of the colorant 13 during the wiping process described later.

  In particular, when the pattern-like groove 12 includes the joint groove 12b in the direction B orthogonal to the longitudinal direction of the long sheet-like base material 11, the blade jumps up by the raised portion of the downstream contour portion of the joint groove 12b, In many cases, scrapes are left in a line parallel to the pattern-like groove 12 on the downstream side of the raised portion. When the pressing force of the blade is increased in order to eliminate this scraping, the amount of the blade entering the joint groove 12b is increased, which tends to result in insufficient filling of the colorant 13.

  In order to solve this problem, instead of using a thermoplastic resin layer already formed into a film or sheet, at the time of melt extrusion molding of the thermoplastic resin layer, cooling is performed on one side of the molten thermoplastic resin layer. It is most preferable to use a melt extrusion simultaneous embossing method in which embossing is performed by pressing an embossing roll. According to this method, since it is a molding method similar to pouring the resin into the mold in a molten state, the surface shape is a faithful reproduction of the surface shape of the embossed plate, and the contour portion of the pattern-like groove 12 As a result, no swelled portion is formed, so that the above-mentioned problem of unscratching remains.

  In addition, according to the melt extrusion simultaneous embossing method, the back and forth phenomenon in which the uneven shape by the embossing appears on the back surface of the thermoplastic resin layer hardly occurs, and the long sheet-like substrate 11 having a smooth back surface is obtained. Therefore, it is also effective for preventing unevenness of scraping or unscratch remaining during wiping processing due to the unevenness of the back surface of the long sheet-like base material 11.

  In the example shown in FIG. 2, the long sheet-like base material 11 includes, in order from the surface side, a transparent thermoplastic resin layer 11a, an adhesive resin layer 12b, an anchor agent layer 11c, a picture layer 11d, and a colored thermoplastic resin layer 11e. It is composed of an easily adhesive layer 11f. This long sheet-like base material 11 has a pattern layer 11d printed on the surface of the colored thermoplastic resin layer 11e, and further applied with an anchor agent layer 11c. On the surface of the anchor agent layer 11c, an adhesive resin layer 12b and a transparent It can be obtained by melt extrusion laminating the thermoplastic resin layer 11a and embossing the patterned grooves 12 on the surface of the transparent thermoplastic resin layer 11a. The decorative groove 1 is configured by filling the pattern-like grooves 12 with a colorant 13 and further forming a surface protective layer 14 on the entire surface.

  Examples of the thermoplastic resin used in the transparent thermoplastic resin layer 11a and the colored thermoplastic resin layer 11e include polyolefin resins, polyester resins, acrylic resins, styrene resins, vinyl resins, polyamide resins, and the like. Mixtures, copolymers, laminates and the like can be arbitrarily used. Furthermore, various additives such as a colorant, a filler, an ultraviolet absorber, a light stabilizer, and a heat stabilizer may be added as necessary. The thickness of the colored thermoplastic resin layer 11e is about 50 to 150 μm, and the thickness of the transparent thermoplastic resin layer 11a (however, when the adhesive resin layer 12b is coextruded is about 80 to 120 μm). It is preferable to do.

  The pattern layer 11d is formed by a known printing method such as a gravure printing method, an offset printing method, or a screen printing method using a known printing ink in which an organic or inorganic coloring pigment is dispersed in a resin binder. That's fine. There is no limitation on the type of the picture pattern, and for example, a wood grain pattern, a stone pattern, an abstract pattern, and the like can be arbitrarily selected.

  The anchor agent layer 11c has a thickness after drying an anchor agent mainly composed of a two-component curable urethane resin composed of a polyol resin such as polyester polyol, polyether polyol, and acrylic polyol and an isocyanate curing agent. It can be formed by coating to about 1 to 5 μm.

  The adhesive resin layer 11b is used together with the transparent thermoplastic resin layer 11a in order to improve the interlayer adhesion strength when the transparent thermoplastic resin layer 11a is laminated on the colored thermoplastic resin layer 11e by the melt extrusion lamination method. Lamination is performed by extrusion, and an acid-modified polyolefin resin such as polyethylene or polypropylene obtained by graft copolymerization with an unsaturated carboxylic acid such as maleic acid can be preferably used. The thickness is usually about 10 to 50 μm.

  The easy-adhesion layer 11f is for improving adhesiveness with the general-purpose adhesive 3 for bonding at the time of bonding to the base material 2 to be described later. For example, the urethane-based resin and the ethylene-vinyl acetate copolymer are used. It is possible to use a primer agent mainly composed of a polymer resin, a chlorinated polyolefin resin, an acrylic resin, etc., and an additive such as silica powder for preventing blocking as required. The thickness is usually about 0.5 to 5 μm.

  As the colorant 13 to be filled in the pattern-like groove 12, a paint obtained by dispersing an organic or inorganic color pigment in a resin binder can be used as in the printing ink used for the picture layer 11d. From the surface, it is preferable to use a curable resin-based material, for example, it is preferable to use a paint or the like having a one-component or two-component curable urethane resin as a binder.

  Since the surface protective layer 14 is for imparting surface properties such as abrasion resistance, scratch resistance, solvent resistance, and weather resistance to the surface of the decorative sheet 1, it is preferable to use a curable resin. Thermosetting resins such as two-component curable urethane resins, self-crosslinking acrylic resins, melamine resins, epoxy resins, and amino alkyd resins, and ultraviolet rays such as (meth) acrylate, epoxy, and polyester resins Alternatively, it is preferable to use an ionizing radiation curable resin that is cured by irradiation with an electron beam.

  For the surface protective layer 14, for example, additives such as a colorant, a filler, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a lubricant, a lubricant, an antibacterial agent, an antistatic agent, and an anti-slip aggregate are optionally added. It may be added. The thickness of the surface protective layer 14 is usually about 1 to 50 μm, and in particular, considering the scratch resistance as the surface material of the flooring and the post-processability such as lamination to the base substrate 2, about 6 to 15 μm. Is most preferable.

  The flooring 4 of the present invention is obtained by bonding the decorative sheet of the present invention described above to the surface of an appropriate base material 2. The base material 2 can be the same as that of the conventional flooring material. For example, ordinary plywood, wood fiber board, wood synthetic resin board (wooden filling such as wood flour) prescribed in the Japanese Agricultural Standards A compound obtained by blending an agent with a synthetic resin and formed into a plate shape) can be used. The thickness is usually about 3 to 30 mm.

The adhesive 3 used for bonding the base substrate 2 and the decorative sheet 1 may be a general-purpose one, for example, using a one-pack vinyl acetate resin emulsion-based adhesive or a two-pack urethane-modified vinyl resin aqueous adhesive. Can do. In addition, it is also possible to use a two-component urethane-based solvent-type adhesive, a moisture-curable urethane-based hot melt adhesive, or the like. The application amount is usually about 30 to 100 g / m ² (wet).

  Two-component urethane resin containing a known opaque inorganic pigment and organic pigment on the surface of a 70 μm thick homopolypropylene resin film to which an opaque pigment composed of an ultraviolet absorber, a light stabilizer, a heat stabilizer, an inorganic pigment and an organic pigment is added A wood grain pattern is printed with a system gravure ink, and a two-component urethane resin is applied to a thickness of 1 μm after drying to form an anchor agent layer. On the anchor agent layer surface, a maleic acid-modified polypropylene adhesive resin and an ultraviolet ray When a transparent homopolypropylene-random polypropylene mixed resin added with an absorbent, a light stabilizer and a heat stabilizer is melt-extruded so as to have thicknesses of 15 μm and 85 μm, respectively, and laminated while spraying ozone gas on the adhesive resin surface. At the same time, the embossed pattern grooves were embossed using a cooled embossing roll. In addition, this pattern-like groove is composed of a joint groove in the longitudinal direction and a direction orthogonal thereto, and a fine uneven pattern at the bottom of the groove. The joint groove has a depth of 60 μm, an opening width of 1.5 mm, A lattice-like pattern (with one side of the square of the concave portion in the lattice being 159 μm, the width of the convex portion of the lattice portion being 10 μm, and the area of the concave portion being wider than the area of the convex portion) was applied to the bottom of the groove with an unevenness difference of 25 μm.

Subsequently, a two-component urethane-based colored paint containing an opaque inorganic pigment and organic pigment is applied to the entire surface, and a wiping treatment is applied in a conventional manner using a synthetic resin blade to fill the patterned groove with the colored paint. did. Thereafter, a two-component urethane resin to which an ultraviolet absorber, a light stabilizer, a glass bead for preventing slip, and the like are added is applied to a coating amount after drying of 10 g / m ² to form a surface protective layer. On the back surface, a two-component urethane resin to which silica powder was added was applied at a coating amount of about 1.5 g / m ² after drying to form an easy-adhesion layer, thereby producing a decorative sheet of the present invention.

In addition, the decorative sheet is coated on a surface of a 15 mm thick lauan laminated plywood with a urethane-modified vinyl resin aqueous adhesive (CVC555: cross-linking agent v = 100: 5, coating amount 60 g / m ² (wet by Konishi Co., Ltd.). )) To produce a flooring of the present invention.

  The depth of the joint grooves is 60 μm, the opening width is 2.5 mm, and the bottom of the groove is a lattice (the square side of the concave portion in the lattice is 95 μm, the width of the convex portion of the lattice portion is 74 μm, the area of the concave portion is A decorative sheet and a flooring were prepared in the same manner as in Example 1 except that a pattern of wider than the area was applied with an unevenness difference of 18 μm.

  The depth of the joint groove is 60 μm, the opening width is 1.5 mm, and the groove bottom has a line-like pattern (recess width 234 μm, protrusion width 20 μm, the area of the recess is wider than the area of the protrusion) with an unevenness difference of 25 μm. A decorative sheet and a flooring were prepared in the same manner as in Example 1 except that it was applied.

The depth of the joint groove is 60 μm, the opening width is 2.5 μm, and a line-like pattern (recess width 140 μm, protrusion width 114 μm, the area of the recess is wider than the area of the protrusion) is 18 μm. A decorative sheet and a flooring were prepared in the same manner as in Example 1 except that it was applied.
<Comparative Example 1>
A decorative sheet and a flooring were prepared in the same manner as in Example 1 except that no pattern was applied to the groove bottom.
<Comparative example 2>
A decorative sheet and a flooring were prepared in the same manner as in Example 3 except that the line-like pattern at the bottom of the groove was changed to a concave portion width of 114 μm and a convex portion width of 140 μm.
<Evaluation>
In Examples 1 and 3, the joint groove was sufficiently filled with the colorant, and the design was good. In Examples 2 and 4, the convex portion was wide, but the colorant was sufficiently filled. In Comparative Example 1, the filling of the colorant was partially swept away to form a mottled pattern, and in Comparative Example 2, a fine concavo-convex pattern emerged in the groove, resulting in poor design.

The perspective view which shows embodiment of the decorative sheet of this invention. The sectional side view which shows embodiment of the decorative sheet and flooring of this invention. Schematic which shows the example of the fine uneven | corrugated pattern of the groove bottom part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cosmetic sheet 11 ... Long sheet-like base material 11a ... Transparent thermoplastic resin layer 11b ... Adhesive resin layer 11c ... Anchor agent layer 11d ... Pattern layer 11e ... Colored thermoplastic resin layer 11f ... Easy adhesion layer 12 ... ... Pattern-like groove 12a ... Longitudinal joint groove 12b ... Joint groove 13 in the direction orthogonal to the longitudinal direction ... Colorant 14 ... Surface protective layer 15 ... Fine uneven pattern 2 at the bottom of groove 2 ... Base substrate 3 …… Adhesive layer 4 …… Floor material A …… Longitudinal direction B …… Perpendicular to longitudinal direction

Claims (5)

  On the surface of the long sheet-like base material, a pattern-like groove including at least joint grooves in the direction perpendicular to the longitudinal direction is formed, and the pattern-like groove is a decorative sheet that is filled with a colorant, A decorative sheet in which a fine concavo-convex pattern is applied to the bottom of the joint-like groove at a depth of 5 to 25 μm, and the area of the pattern concave portion is larger than the area of the pattern convex portion.   The decorative sheet according to claim 1, wherein the joint grooves in the direction perpendicular to the longitudinal direction have a depth of 40 to 80 µm and an opening width of 0.5 to 3.0 mm.   On the surface of the long sheet-like base material, a pattern-shaped groove including at least joint grooves in the direction perpendicular to the longitudinal direction is formed, and the recess area is smaller than the protrusion area at a depth of 5 to 25 μm at the bottom of the joint groove. A method for producing a decorative sheet, wherein a wide fine uneven pattern is formed, and the pattern-like groove is filled with a colorant by a wiping method.   The long sheet-like base material is provided with a thermoplastic resin layer thicker than the depth of the pattern-like groove on at least the surface portion, and the pattern-like groove is in a molten state at the time of melt extrusion molding of the thermoplastic resin layer. The method for producing a decorative sheet according to claim 3, wherein the sheet is formed by pressing a cooling embossing roll on one side of the thermoplastic resin layer.   A flooring material comprising the decorative sheet according to claim 1 bonded to a base substrate.

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