JP2012087536A - Plate building material and manufacturing method of plate building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate building material and a manufacturing method of the plate building material, which improves appearance of an end face.SOLUTION: A plate building material 1 includes a surface decorative member 20 which has folding grooves 27 and 28 on a rear face 20a corresponding to edges 17 and 18 of a plate base material 10, the surface decorative member 20 being attached along an outer peripheral surface of the plate base material. A cured layer 31 of hot-melt adhesive is formed in a gap between one end face 13 of the base material and a rear face 23a of the surface decorative member corresponding to the end face.

Description

  The present invention relates to a plate-shaped building material in which a surface decorative material is bonded to the outer peripheral surface of a base material, and a method for manufacturing the plate-shaped building material.

  Conventionally, there has been a construction material in which a surface material in which a bending V-groove corresponding to an edge of a core having a rectangular cross section is formed on the back surface is attached to be bent along the V-groove along the outer peripheral surface of the substrate. It has been proposed (see, for example, Patent Document 1 below).

JP-A-7-286479

However, in the sticking structure as described above, due to deformation such as processing error or warpage of the surface material (surface decorative material) or the core material (base material), particularly the end surface (the end surface) of the base material and the surface corresponding thereto. There was a problem that a gap was generated between the back surface of the decorative material. Such a gap is exposed at the other end face that intersects one end face of the base material to which the surface decorative material is adhered, and there is a problem that the appearance is poor.
Other end faces as described above are subjected to end face processing such as sticking of edge sheets and attachment of end face covers, etc. at the construction site, or end faces of other members are connected continuously, etc. Makes the above gaps inconspicuous. In addition, depending on the construction mode such as the upper and lower end surfaces of the joinery, it is conceivable that the gap is less noticeable after construction. However, in the distribution process before construction and the like, the other end face (the end face to which the surface decorative material is not attached) is exposed, and thus an improvement has been desired.

  This invention is made | formed in view of the said situation, and it aims at providing the manufacturing method of the plate-shaped building material which can improve the appearance of an end surface, and a plate-shaped building material.

  In order to achieve the above object, the plate-shaped building material according to the present invention has a surface decorative material provided with a bent groove on the back surface corresponding to the edge of the plate-shaped base material along the outer peripheral surface of the base material. A hot-melt adhesive cured layer is formed in a gap formed between one end surface of the base material and the back surface of the surface decorative material corresponding to the one end surface. It is characterized by that.

  In the present invention, the back surface of the surface decorative material is provided with a bent groove corresponding to each edge of both side end surfaces of the base material, and the hot-melt adhesive cured layer is connected to both side end surfaces of the base material. You may make it form in each clearance gap formed between the back surfaces of the said surface decoration material corresponding to these both end surfaces.

  In addition, in order to achieve the above object, a method for producing a plate-shaped building material according to the present invention includes a surface decorative material provided with a bent groove on the back surface corresponding to an edge of a plate-shaped substrate. A method of manufacturing a plate-shaped building material that is attached so as to be along the outer peripheral surface of the base material, and is hot in a gap formed between one end surface of the base material and the back surface of the surface decorative material corresponding to the one end surface. A hot-melt adhesive is applied so that a melt-type adhesive cured layer is formed, and the surface decorative material is folded at a folding groove and attached to the substrate.

  The plate-shaped building material and the method for manufacturing the plate-shaped building material according to the present invention can improve the appearance of the end face by adopting the above-described configuration.

(A) is a schematic sectional drawing which shows typically an example of the plate-shaped building material which concerns on one Embodiment of this invention, (b) demonstrates an example of the manufacturing method of the plate-shaped building material which concerns on one Embodiment of this invention. It is a schematic sectional drawing for doing. (A), (b) is a schematic sectional drawing for demonstrating both the manufacturing methods. (A) is a schematic sectional drawing which shows typically an example of the plate-shaped building material which concerns on other embodiment of this invention, (b) is an example of the manufacturing method of the plate-shaped building material which concerns on other embodiment of this invention. It is a schematic sectional drawing for demonstrating.

Embodiments of the present invention will be described below with reference to the drawings.
FIG.1 and FIG.2 is a conceptual explanatory drawing for demonstrating an example of the manufacturing method of the plate-shaped building material which concerns on 1st Embodiment, and a plate-shaped building material.
As shown in FIG. 1A, the plate-shaped building material 1 according to the present embodiment has a structure in which a surface decorative material 20 is attached so as to be along the outer peripheral surface of a substantially rectangular flat plate-like base material 10. .

  In this embodiment, the plate-shaped building material 1 is exemplified for various frame members such as a window frame, a door frame, and an unframed frame. It may be used as a construction member. Alternatively, it may be used as a door panel (joint) such as a door plate, an open / close door, or a sliding door, or may be assembled to a furniture material as a door panel of the furniture material. Furthermore, it may be used as other interior materials. According to such a usage mode, the outer shape of the plate-shaped building material 1, the bonding area of the surface decorative material 20 to be bonded to the base material 10, or the like may be appropriately changed.

As shown in FIGS. 1 (a) and 2 (a), the base material 10 has a surface 11, side end surfaces 12, 13 (for example, side end surfaces in the width direction), and an illustration that intersects the side end surfaces 12, 13. It is made into a substantially hexahedron shape having both side end surfaces (for example, both side end surfaces in the longitudinal direction) and a back surface. Cutout step portions 14 and 14 are respectively formed at both end portions of the back surface. The height dimension (dimension along the thickness direction of the base material 10) of the stepped walls 14 and 14 is substantially the same as the thickness dimension of the surface decorative material 20 described later.
The surface 11 of the base material 10 and both side end surfaces 12 and 13 intersect so as to be substantially orthogonal, and the intersecting portions (protruding corner portions) become the edge portions 15 and 17 on the surface side. Further, the step bottoms of the notch portions 14 and 14 on the back surface of the substrate 10 and the side end surfaces 12 and 13 intersect so as to be substantially orthogonal, and the intersecting portions become the edge portions 16 and 18 on the back surface side. .

The base material 10 is a wood-based material such as a wood laminate such as plywood or LVL (single-plate laminate), a wood board such as particle board, or a wood fiber board such as insulation board or MDF (medium density fiber board). Are processed into a substantially rectangular flat plate shape as described above.
Alternatively, a wood powder / plastic composite (WPC) containing wood powder, inorganic filler, compatibilizing agent, colorant, etc. in a synthetic resin material at a specified content ratio is processed into a substantially rectangular flat plate as described above. It is good also as what you did. These may be appropriately combined and laminated to form the base material 10.

The base material 10 is not limited to a material made of wood-based material, wood powder / plastic composite (WPC), and may be formed from a synthetic resin-based material, a ceramic material, a metal-based material, or the like.
Moreover, it is not restricted to what was formed in the substantially rectangular flat plate shape from said various materials, but the aggregate | assembly of many hollow cylindrical cells opened in the thickness direction between the frame members framed by the vertical frame, the horizontal frame, etc. A base material 10 having a so-called flash structure in which a core material such as a honeycomb core made of the material is disposed may be used.

  The surface decorative material 20 has a thin plate shape. As shown in FIGS. 1 (a) and 2 (a), the back surface 20a has the edges 15, 16, 17, and 18 on the back surface 10a. A plurality of bent grooves 25, 26, 27, and 28 corresponding to each other are formed. With the plurality of bent grooves 25, 26, 27, 28 as boundaries, the surface decorative material 20 is made to correspond to the front surface 11 of the substrate 10, both side end surfaces 12, 13, and the notch portions 14, 14 on the back surface. The front plate-like portion 21, the end plate-like portions 22 and 23, and the back plate-like portions 24 and 24 are provided.

The bent grooves 25 and 27 corresponding to the edge portions 15 and 17 on the surface side of the base material 10 are each provided with a plurality of cross sections substantially V so that chamfered portions are formed at the surface side edge portions of the plate-shaped building material 1. It is assumed to consist of a letter-shaped bent groove. In the illustrated example, an example is shown in which each of the plate-shaped building materials 1 includes two bent grooves so that a C-chamfered chamfered portion is formed on the surface side edge portion. In addition, these bent grooves 25 and 27 may each be composed of a plurality of bent grooves such that an R chamfered chamfered portion is formed at the surface side edge of the plate-shaped building material 1.
In the example, the bent grooves 26 and 28 corresponding to the edges 16 and 18 on the back surface side of the substrate 10 are each formed of a single bent groove having a substantially V-shaped cross section. In the example shown in the drawing, the angle of the groove bottoms of these bent grooves 26 and 28 is set to be substantially right angle so that the back side edge of the plate-shaped building material 1 has a substantially right angle shape.

  The surface decorative material 20 may have a structure in which a plate material made of a wood-based material or wood powder / plastic composite material (WPC) similar to the above is used as a substrate and a decorative sheet is laminated on the surface thereof. For example, a synthetic resin decorative sheet (film) may be laminated on the surface of a substrate made of a wood fiber board such as MDF. The folded grooves 25, 26, 27, and 28 formed on the back surface of the surface decorative material 20 having such a laminated structure may be formed on the substrate so as to leave at least the synthetic resin decorative sheet. Good. For example, you may make it form by cutting from the back surface side of the said surface decoration material 20 with cutting tools, such as a router.

Instead of such an embodiment, a structure in which decorative paper as a decorative sheet or resin-impregnated decorative paper is laminated on the surface of the substrate may be employed. Alternatively, a structure in which a coating layer is provided on the surface of the substrate by applying a coating process such as an antifouling paint, a light-resistant paint, or a water repellent paint may be used. In this case, it is preferable to form a coating layer that does not cause splitting or the like on the surface side when it is bent in each bent groove.
Further, the bent grooves 25 and 27 of the surface decorative material 20 corresponding to the edges 15 and 17 on the surface side of the base material 10 are formed so that the surface side edges of the plate-shaped building material 1 have a substantially right-angle shape. May be. Further, a plurality of bent grooves 26 and 28 of the surface decorative material 20 corresponding to the edge portions 16 and 18 on the back surface side of the base material 10 are formed so that chamfered portions are formed on the back surface side edge portion of the plate-shaped building material 1. It may be a book.
Further, the thickness of the surface decorative material 20 is, for example, 1.0 mm to 5.0 mm when the plate-shaped building material 1 is used for the above-described various frame members, construction members, joinery, interior panels, furniture materials, and the like. It is good also as a grade.

Next, an example of the manufacturing method of the plate-shaped building material which manufactures the plate-shaped building material 1 which concerns on this embodiment is demonstrated.
First, an adhesive is applied to both or one of the back surface 20a of the surface decorative material 20 and the outer peripheral surface of the base material 10 to which the surface decorative material 20 is attached. The adhesive is not particularly limited, and examples thereof include a room temperature curing type woodworking adhesive such as a vinyl acetate resin, an aqueous adhesive containing synthetic rubber, polylactic acid, starch, an acrylic resin, or an emulsion adhesive. . Alternatively, an adhesive containing a thermosetting resin such as a urea resin, a melamine resin, a urea-melamine cocondensation resin, a phenol resin, an epoxy resin, or a urethane resin may be employed.

  In addition, the adhesive may be applied by a roll coater, a flow coater, a spray, or the like. In addition, the adhesive is not applied to the back surface 23a of the surface decorative material 20 to which the hot melt adhesive 30 (see FIG. 1B), which will be described later, is applied and the end surface 13 of the base material 10 corresponding thereto. It may be. In addition, the application of the adhesive to the back surface of the back plate-like portion 24 of the surface decorative material 20 on the side to which the hot melt adhesive 30 to be described later is applied and the notch step portion 14 of the base material 10 corresponding thereto, You may make it carry out after apply | coating the hot-melt-type adhesive agent 30. FIG.

Then, as shown in FIG. 2 (a), the surface 11 of the substrate 10 and the back surface of the surface plate-like portion 21 of the surface decorative material 20 are arranged to face each other, as shown in FIG. 2 (b). The surface 11 of the base material 10 and the back surface of the surface plate-like portion 21 of the surface decorative material 20 are bonded together.
Next, as shown in FIGS. 2 (b) and 1 (b), one end side of the surface decorative material 20 is bent at its bent grooves 25 and 26, and one end face 12 and one of the base material 10 are bent. It adheres to one end surface 12 and one notch step 14 of the base material 10 so as to be wound around the notch step 14. That is, the bent groove 25 is bent, and the back surface of the one end face plate-like portion 22 of the surface decorative material 20 is bonded to the one end face 12 of the substrate 10. Further, it is bent at the bending groove 26, and the back surface of one back plate-like portion 24 of the surface decorative material 20 is bonded to the step bottom surface of one notch step portion 14 of the base material 10. At this time, pressing is performed by appropriate pressing means such as a roller press so that a gap is not formed between the back surface of the one end face plate-like portion 22 of the surface decorative material 20 and the one end face 12 of the base material 10. May be.

Moreover, as shown in FIG.1 (b), the hot-melt-type adhesive agent 30 is apply | coated to the back surface 23a of the other end surface plate-shaped part 23 of the surface decorative material 20. FIG. In the illustrated example, the melted hot melt adhesive 30 supplied from a hot melt applicator or the like is applied in a bead shape along the longitudinal direction of the end face plate portion 23 by a bead gun (hot melt gun) or the like. Yes.
Examples of the hot-melt adhesive 30 include polyolefin-based hot-melt adhesives mainly composed of a synthetic resin such as ethylene vinyl acetate resin (EVA), polypropylene resin, or polyethylene resin. In addition, you may make it employ | adopt what was set as the appropriate melt viscosity and hardening time so that formation of the hot-melt-type adhesive agent hardening layer 31 mentioned later is possible. Moreover, you may make it employ | adopt the thing of a suitable melting temperature from viewpoints, such as heat resistance, according to the use application of the said plate-shaped building material 1. FIG. Moreover, in order to slow down the cure rate of the hot-melt adhesive 30 applied to the back surface 23a of the end face plate-like portion 23, the surface decorative material 20 and the base material 10 may be preheated. Further, instead of or in addition to the mode of applying to the back surface 23 a of the end surface plate-like portion 23, the hot melt adhesive 30 may be applied to the other end surface 13 of the substrate 10.

As described above, the other end portion side of the surface decorative material 20 to which the hot melt adhesive 30 is applied is bent by the bent grooves 27 and 28, and the other end face 13 and the other notch step portion of the base material 10 are folded. 14 is bonded to the other end face 12 and the other notch step portion 14 of the substrate 10. That is, it is bent at the bending groove 27 and bonded so that the back surface 23 a of the other end face plate-like portion 23 of the surface decorative material 20 faces the other end face 13 of the base material 10. Further, it is bent at the bending groove 28, and the back surface of the other back surface plate-like portion 24 of the surface decorative material 20 is bonded to the step bottom surface of the other notch step portion 14 of the base material 10.
Thereby, the hot-melt adhesive 30 applied as described above is caused by the proximity action between the back surface 23a of the other end face plate-like portion 23 of the surface decorative material 20 and the other end face 13 of the base material 10. Spread across the gap formed between the two. And as shown to Fig.1 (a), if the hot-melt-type adhesive 30 hardens | cures, between the back surface 23a of the other end surface plate-shaped part 23 of the surface decorative material 20, and the other end surface 13 of the base material 10 will be shown. The hot-melt adhesive-cured layer 31 is formed over substantially the entire gap formed in the step. The application amount of the hot-melt adhesive 30 is determined in consideration of processing errors of the base material 10 and the surface decorative material 20, warpage after processing, and the like. You may make it set suitably so that 31 may be formed.

  As described above, the surface decorative material 20 is folded along the respective bending grooves 25, 26, 27, 28 so as to be along the outer peripheral surface of the base material 10. You may make it press and cure until the said adhesive agent hardens | cures by appropriate press means, such as a roller press.

The gap formed between the one end face (the other end face) 13 of the base material 10 and the back face 23a of the end face plate-like portion 23 of the surface decorative material 20 corresponding to the one end face 13 through the steps described above. The plate-shaped building material 1 in which the hot-melt adhesive cured layer 31 is formed is manufactured. According to such a plate-shaped building material 1, the gap becomes inconspicuous due to the formation of the hot-melt adhesive-cured layer 31, and the end surface of the plate-shaped building material 1 adjacent to the one end surface 13 of the base material 10 (for example, surface decoration) The appearance of the end surface in the longitudinal direction where the material 20 is not attached can be improved.
Further, since the hot-melt adhesive cured layer 31 is formed in the gap, the space between the one end face 13 of the base material 10 and the end face plate-like portion 23 of the surface decorative material 20 does not become hollow. The strength of the end portion of the plate-shaped building material 1 to be improved can be improved.

  Further, in the present embodiment, the bent grooves 25, 26, 27, 28 corresponding to the respective edge portions 15, 16, 17, 18 of the both side end surfaces 12, 13 of the base material 10 are formed on the back surface 20 a of the surface decorative material 20. On the other hand, notch step portions 14 and 14 are formed on the back surfaces of both end portions of the base material 10, respectively. Therefore, the back plate-like portions 24 and 24 at both end portions of the surface decorative material 20 can be attached so as to be accommodated in the notched step portions 14 and 14. Moreover, since the back surface of the both-sides edge part of the said plate-shaped building material 1 turns into a makeup | decoration surface by the surface decorative material 20, a back surface center site | part etc. are fixed to a frame foundation | substrate, a wall foundation | substrate, etc. It is suitable for frame members and headboards, etc.

  Furthermore, in the manufacturing method of the plate-shaped building material which concerns on this embodiment, the hot-melt-type adhesive 30 for forming the hot-melt-type adhesive hardening layer 31 in the said clearance gap is used for both the surface decorative material 20 and the base material 10, or It is applied to one side and the surface decorative material 20 is bent and adhered to the base material 10. Therefore, it can respond by adding the process of apply | coating the hot-melt-type adhesive agent 30 to the manufacturing line of the conventional plate-shaped building material, and can prevent that a manufacturing line becomes complicated.

In addition, in the example of a figure, the back surface 20a of the surface cosmetic material 20 is turned up, and the example which set the base material 10 with respect to this back surface 20a and stuck the surface cosmetic material 20 is shown. However, it is good also as an aspect which sticks the surface decoration material 20 on the outer peripheral surface of the base material 10 upside down.
Further, in the illustrated example, one end portion side of the surface decorative material 20 is bonded to one end surface 12 and the notch step portion 14 of the base material 10, and the hot melt adhesive 30 is applied to the other side, and the other end portion is applied. Although the part side is made into the example which adhered the other end surface 13 and notch step part 14 of substrate 10, it is not restricted to this. For example, after the hot-melt adhesive 30 is applied to the other side, both end portions of the surface decorative material 20 are bonded to the side end surfaces 12 and 13 and the notched step portions 14 and 14 of the base material 10 in the same process. It may be.

  Further, in the illustrated example, only the gap formed between one end surface (the other end surface) 13 of the base material 10 and the back surface 23 a of the end face plate-like portion 23 of the surface decorative material 20 corresponding to the one end surface 13. Although the example which formed the hot-melt-type adhesive-cured layer 31 is shown, it is not restricted to such an aspect. For example, in addition to the above-mentioned gap, when a gap is formed between the front surface 11 and the back surface of the base material 10 in the vicinity of the one end surface 13 of the base material 10 and the back surface 20a of the surface decorative material 20 corresponding thereto. The hot melt adhesive cured layer 31 may be formed so as to reach this gap. In this case, the hot melt adhesive 30 applied as described above may be spread and spread across the gaps. Or you may make it apply | coat the hot-melt-type adhesive 30 to an appropriate location so that the hot-melt-type adhesive hardening layer 31 may be formed in each said clearance gap.

  Furthermore, although the example of a figure has illustrated the aspect which stuck the surface decorative material 20 so that the back surface of the width direction both side end surface and each end surface vicinity of the plate-shaped building material 1 may become a decorative surface, It is good also as an aspect stuck so that a surface, an end surface, and the back surface of this one end surface vicinity may become a decorative surface. That is, it is good also as an aspect which sticks the surface decoration material 20 to the back surface of the base material 10 at least the surface 11, the one end surface 13, and the one end surface 13 vicinity. In this case, the one back plate-like portion 24 of the surface decorative material 20 or the one end face plate-like portion 22 in addition to this may not be provided.

Next, another embodiment according to the present invention will be described with reference to the drawings.
Drawing 3 is a conceptual explanatory view for explaining an example of a manufacturing method of a plate-shaped building material and a plate-shaped building material concerning a 2nd embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified. Also, the description of the same steps as those of the plate-shaped building material manufacturing method according to the first embodiment will be omitted or briefly described.

As shown in FIG. 3A, the plate-shaped building material 1 </ b> A according to the present embodiment includes both side end surfaces 12 and 13 of the base material 10 and back surfaces 22 a and 23 a of the surface decorative material 20 corresponding to the both side end surfaces 12 and 13. The hot-melt adhesive cured layers 31 and 31A are formed in the respective gaps formed between the two layers.
Moreover, the manufacturing method of 1 A of plate-shaped building materials which concern on this embodiment applies the said adhesive agent to both or one of the outer peripheral surface of the base material 10, and the back surface 20a of the surface decoration material 20 like the above. Moreover, as shown in FIG.3 (b), the hot-melt-type adhesive agent 30 for forming the hot-melt-type adhesive agent hardening layers 31 and 31A is apply | coated. In the illustrated example, hot melt adhesives 30 and 30 are applied in a bead shape to the back surface 22a of one end face plate-like portion 22 and the back surface 23a of the other end face plate-like portion 23 of the surface decorative material 20, respectively. ing. Instead of or in addition to this, the hot melt adhesives 30 and 30 may be applied to the end faces 12 and 13 of the substrate 10.
Then, in substantially the same manner as described above, the plate-shaped building material 1 </ b> A is manufactured by bending the surface decorative material 20 at each of the bent grooves 25, 26, 27, and 28 and sticking it to the outer peripheral surface of the base material 10. .

  According to 1A of plate-shaped building materials which concern on this embodiment, there exists an effect substantially the same as the said 1st Embodiment. Moreover, the space between the both side end surfaces 12 and 13 of the base material 10 and the back surface 20a of the surface decorative material 20 corresponding thereto is not hollow, and both side end portions (for example, in the width direction) of the corresponding plate-shaped building material 1A corresponding thereto. The strength of both side ends) can be improved.

In each of the above-described embodiments, the notched step portions 14 and 14 are formed on the back surface of the base material 10, and are pasted so that both side end portions (back surface plate-like portions) 24 and 24 of the surface decorative material 20 are accommodated therein. Although an example is shown, it is not restricted to such a mode. For example, it is good also as an aspect which affixes the both-sides edge parts 24 and 24 of the surface decoration material 20 on the back surface of the base material 10, without forming such a notch step part in the base material 10. FIG.
Moreover, in each said embodiment, although the example which does not stick the surface decorative material 20 to the back surface approximate center part of the base material 10 is shown, it is not restricted to such an aspect. For example, a mode in which the surface decorative material 20 is attached so as to wrap around the entire circumference of the outer peripheral surface of the base material 10 so that both end surfaces of the surface decorative material 20 abut on the back surface or one end surface of the base material 10. It is good.
Furthermore, in each said embodiment, although the example which stuck the surface decorative material on the plate-shaped base material is shown, it is not restricted to a plate-shaped base material, A surface decorative material is stuck on a box-shaped base material. It is good also as an aspect.

DESCRIPTION OF SYMBOLS 1,1A Plate-shaped building material 10 Base material 12,13 End surface 15 of base material 15,17 Edge part 16 of base material side edge 18, Edge part of back side of base material 20 Surface decorative material 20a Back surface 22a of surface decorative material 23a Back surface of the decorative material corresponding to the end face of the base material 25, 27 Folded groove corresponding to the edge on the front surface side 26, 28 Folded groove corresponding to the edge on the back surface side 30 Hot melt adhesive 31 , 31A Hot-melt adhesive hardened layer

Claims (3)

A plate-like building material in which a surface decorative material provided with a bent groove corresponding to the edge of a plate-like base material is attached to the back surface along the outer peripheral surface of the base material,
A plate-shaped building material, wherein a hot-melt adhesive cured layer is formed in a gap formed between one end surface of the base material and the back surface of the surface decorative material corresponding to the one end surface. In claim 1,
On the back surface of the surface decorative material, a bent groove corresponding to each edge of both side end surfaces of the base material is provided,
The said hot-melt-type adhesive-cured layer is formed in each clearance gap formed between the both-ends surface of the said base material, and the back surface of the said surface decoration material corresponding to these both-ends surface. Building material. A method for producing a plate-shaped building material, in which a surface decorative material provided with a bent groove on the back surface corresponding to an edge of a plate-shaped base material is attached so as to be along the outer peripheral surface of the base material,
Applying a hot melt adhesive so that a hot melt adhesive cured layer is formed in a gap formed between one end surface of the base material and the back surface of the surface decorative material corresponding to the one end surface; A method for producing a plate-shaped building material, wherein the surface decorative material is bent at a bent groove and adhered to the base material.

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