JP2012076233A - Fixing carpentry material for construction and method of manufacturing fixing carpentry material set for construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a fixing carpentry material for construction whose decorative paper used for a surface material is not broken by a bending process.SOLUTION: After an elastic adhesive agent layer 14 is formed on a surface of a woody base material 12, the decorative paper 16 is arranged on the surface of the elastic adhesive agent layer 14, and a groove 18 having a V shaped bottom 18a is formed on the woody base material 12. Then the bending process is conducted to close the groove 18. In this case the depth of the groove 18 is set so that the woody base material 12 is cut but the elastic adhesive agent layer 14 is not cut, and the elastic adhesive agent layer 14 has elasticity at least during the bending process, and thereby the problem is solved.

Description

  The present invention relates to a construction material such as a fence, a step board, and a baseboard used for a building such as a house, and a method for manufacturing a construction material set for construction.

  For some time, building construction materials such as fences, footboards and skirting boards used for buildings such as various types of houses have been developed. For example, in Patent Document 1, as shown in FIG. A flexible sheet 2 such as a non-woven fabric or synthetic resin sheet made of polyester or the like is pasted on the surface of the plate material 1, and a veneer or the like made of natural wood is laminated on the surface of the flexible sheet 2. Notch having a V-shaped bottom at the bottom as it faces the flexible sheet 2 from the back surface (the surface opposite to the surface on which the flexible sheet 2 or the like is adhered) of the plate material 1. An architectural material 5 (before bending) in which grooves 4 are formed is disclosed.

  According to the building construction material 5, as shown in FIG. 12A, the construction construction material 5 is desired by bending the flexible sheet 2 so that the notch groove 4 is closed using the flexible sheet 2 as a guide. (In patent document 1, it attaches to the surrounding surface of a "prism").

  In addition, since the flexible sheet 2 is adhered to the surface of the plate material 1, the building construction material 5 is not cracked even if the bending process is performed. Since the flexible sheet 2 rich in flexibility is sandwiched between the plate material 1, “wrinkle”, “cracking” and the like do not occur in the surface material 3.

Japanese Utility Model Publication No. 54-109317

  By the way, as the surface material 3 is popular because sliced and thinned precious wood with beautiful and rare wood grain, the wood grain makeup pattern designed based on such “beautiful wood grain” is The decorative paper printed repeatedly and continuously by the gravure rotary printing technique has been widely used, and it is required to use a cheaper decorative paper as the surface material 3 ′ of the building construction material 5. .

  However, there is a problem in using decorative paper as the surface material 3 ′ in the building construction material 5 of Patent Document 1.

  That is, the polyester sheet and the vinyl chloride resin sheet constituting the flexible sheet 2 have strength and flexibility that can withstand the role of a guide during bending, but have poor elasticity. Yes. For this reason, when the flexible sheet 2 of the bent portion X is bulged outward by folding the cutout groove 4 with the flexible sheet 2 as a guide as described above, a projecting plate or the like is used. If the surface material 3 is made of natural wood, the surface material 3 is made of decorative paper, although there is no problem because it has a strength that can resist the bulging output of the bulging portion (see FIG. 12A). When 'is configured, the decorative paper (= surface material 3') may be torn without being able to resist the bulging output of the bulging portion of the flexible sheet 2 (see FIG. 12B). .

  The present invention has been developed in view of such problems of the prior art. Therefore, a main object of the present invention is to provide a construction material and a manufacturing method of a construction material set for which the decorative paper used as the surface material is not torn by bending.

The invention described in claim 1 is: “After forming the elastic adhesive layer 14 on one surface of the wooden substrate 12, the decorative paper 16 is disposed on the surface of the elastic adhesive layer 14, and
A bottom 18a forms a V-shaped groove 18 on the surface of the wooden substrate 12 where the elastic adhesive layer 14 is not provided,
Then, the manufacturing method of the building construction material 20 for performing the bending process so as to close the groove 18,
The groove 18 is set to a depth that cuts the wood substrate 12 but does not cut the elastic adhesive layer 14.
The elastic adhesive layer 14 is a method for producing a building construction material 20 characterized in that it has elasticity at least during the bending process.

  According to the present invention, the elastic adhesive layer 14 is provided between the wood base 12 and the decorative paper 16, and the elastic adhesive layer 14 has elasticity at least during the bending process. is doing. For this reason, when the elastic adhesive layer 14 of the bent portion X is bulged outward by folding the V-shaped groove 18 provided in the wooden substrate 12 so as to close, the elastic adhesive layer 14 presses the decorative paper 16 with its swollen output, but since the elastic adhesive layer 14 has elasticity as described above, the elastic adhesive layer 14 itself receives the reaction force from the decorative paper 16. Since the elastic deformation causes the film to shrink (thinner) and absorb the swollen output, the risk of the decorative paper 16 being torn can be avoided.

  In addition, as shown in FIGS. 2A to 2C, “depth that cuts the wooden base material 12 but does not cut the elastic adhesive layer 14” of the groove 18 is (a) V in the groove 18. When the position of the letter-shaped bottom portion 18a is flush with the surface of the elastic adhesive layer 14 facing the wood substrate 12, or (b) the position of the bottom portion 18a of the groove 18 is the wood substrate 12 (C) The bottom portion 18a of the groove 18 is elastic with the wood substrate 12 without being limited to the case where a part of the elastic adhesive layer 14 is removed. Even if the wooden substrate 12 is not completely cut because it does not reach the contact surface with the adhesive layer 14, the thickness of the thinnest portion of the wooden substrate 12 can be bent without any problem. If it is thin enough to be performed, “woody substrate 12” according to the present invention is referred to. Cleaves, elastic adhesive layer 14 is included in the depth "that do not cut.

  Further, the number of the grooves 18 is not limited to one, and naturally includes a case where a plurality of grooves 18 are formed as shown in the embodiments described later.

  Further, the shape of the “V-shaped bottom portion 18a” may have a plane portion as shown in FIGS. 2A to 2C, or the cross-sectional shape thereof as shown in FIG. The shape may be such that is an acute angle and no planar portion exists.

  Further, the step of forming the groove 18 in the wooden substrate 12 may be before or after the decorative paper 16 is disposed on the wooden substrate 12.

The invention described in claim 2 relates to the “method for manufacturing a building construction material 20” described in claim 1, wherein “the elastic adhesive layer 14 is formed of a PUR adhesive,
In the bending process, after the elastic adhesive layer 14 is formed, the PUR adhesive is completely cured when the PUR adhesive is cured to such an extent that the flatness of the elastic adhesive layer 14 is not lost. It is performed by ".

  The “PUR (Poly Urethane Reactive) adhesive” is a polyurethane-based hot melt adhesive and is also called a reactive hot melt adhesive. In addition to rapid onset of initial strength due to cooling and curing, it has moisture curability (reactivity), and thus has excellent final physical properties. In addition, it is a highly durable adhesive that has an excellent feature of being in a molten state again when heat is applied after cooling and curing until it is cured, and does not soften even when heat is applied after moisture curing. In the present invention, during the curing of the PUR adhesive, the folding process is performed before the PUR adhesive is completely moisture-cured. Therefore, the decorative paper is made by the elasticity of the uncured PUR adhesive. In addition to avoiding tearing of the PUR adhesive, after the bending process is completed and the PUR adhesive is moisture-cured, even if heat is applied to the PUR adhesive (= elastic adhesive layer 14), Since the agent does not soften again, it is possible to provide a building construction material that can firmly maintain the bent shape.

  That is, the PUR adhesive used in the present invention needs to have an appropriate elasticity after cooling and curing until moisture curing. More specifically, it is only necessary to have elasticity enough to absorb the reaction force from the decorative paper 16 due to the swollen output of the bent portion X during the bending process. For this reason, preferably, a PUR adhesive that is softened by heat or a PUR adhesive that has elasticity at the time of cooling and hardening by adding an additive to the PUR adhesive but loses elasticity after the moisture effect is preferably added. Just choose.

  Examples of the additives mentioned above include styrene resins, terpene resins, aliphatic petroleum resins, aromatic petroleum resins, rhoester resins, tertiary amine catalysts, tin catalysts, paraffin wax and microcrystalline wax. Wax, fillers such as coloring pigments, anti-aging agents and the like are used.

  Further, it does not preclude the selection and use of a PUR adhesive having an appropriate elasticity even after moisture curing by adding a plasticizer or the like or foaming and solidifying the PUR adhesive. However, in this case, the strength of the surface becomes weak, which is not preferable when a high surface strength such as a rising ridge is required.

The invention described in claim 3 relates to the “manufacturing method 20 for building construction material” described in claim 1, “the elastic adhesive layer 14 is formed of a thermoplastic adhesive that cures at room temperature,
When performing the bending process, only the folding position and its periphery are heated to cause elasticity in the thermoplastic adhesive ”.

  In the present invention, the elastic adhesive layer 14 is formed of a thermoplastic adhesive that cures at room temperature, and only the elastic adhesive layer 14 at a necessary portion (= folded portion X) is heated when bending is performed. Thus, the elastic adhesive layer 14 is in a cured state (that is, no elasticity is generated) when the bending process is not performed or in a portion where the elasticity does not need to be generated. For this reason, not only can the decorative paper 16 be prevented from being broken by the elasticity of the heated thermoplastic adhesive during the folding process, but also after the folding process is completed and the heating is stopped (that is, the elastic adhesive layer When 14 becomes normal temperature), it is possible to provide a building construction material that can firmly maintain the bent shape.

  The invention described in claim 4 relates to the “method for manufacturing a building construction material 20” according to any one of claims 1 to 3, wherein “the elastic adhesive layer 14 is applied to the warmed decorative paper 16”. By applying the constituting adhesive, at least a part of the surface of the decorative paper 16 facing the elastic adhesive layer 14 is impregnated with the adhesive ”.

  According to the present invention, the affinity of the elastic adhesive layer 14 and the decorative paper 16 can be remarkably improved by impregnating a part of the decorative paper 16 with the adhesive constituting the elastic adhesive layer 14. The possibility that the paper 16 is peeled off from the elastic adhesive layer 14 can be minimized.

  In particular, when using a PUR adhesive, it is desirable to improve the impregnation property of the PUR adhesive by heating at least the decorative paper 16. This is because it can be prevented from being cooled and solidified immediately after the PUR adhesive is applied to the decorative paper 16, and the permeability of the PUR adhesive is improved. Thereby, the elastic adhesive layer 14 and the portion of the decorative paper 16 impregnated with the PUR adhesive layer can be integrated to withstand the bulging output of the bent portion X.

  Moreover, when using a PUR adhesive, it is desirable to also heat the wooden base material 12 and to improve the affinity between the elastic adhesive layer 14 and the wooden base material 12.

  The invention described in claim 5 relates to the “manufacturing method 20 for building construction” according to any one of claims 1 to 4, “after the decorative paper 16 is disposed, until the folding process is performed. In the meantime, the flexible sheet 26 is disposed on the surface of the decorative paper 16 through the easy-peeling adhesive layer 25 ”.

  According to the present invention, since the flexible sheet 26 is disposed on the surface of the decorative paper 16 via the easily peelable adhesive layer 25, the surface of the flexible sheet 26 is damaged during the bending process. In addition to preventing the surface of the decorative paper 16 from being damaged when the completed building construction material 20 is transported to the construction site, the flexible sheet 26 is not used after completion of the construction at the site. By exfoliating and exposing the decorative paper 16, it is possible to further improve the aesthetic appearance at the finish.

  In addition, the process of arrange | positioning the flexible sheet | seat 26 may be before the process of forming the groove | channel 18 in the wooden base material 12, and may be after.

  The invention described in claim 6 is “a plurality of the L-shaped building construction materials 20 manufactured by the manufacturing method of claim 5, the flexible sheet 26 of one building construction material 20, and the like. The manufacturing method of the building construction material set 30 is arranged so that the wooden base material 12 of the building construction material 20 of the construction material 20 is in close proximity to each other and then packed.

  Conventionally, the L-type building construction material after being subjected to the bending process has been made one by one or two in combination in a square shape as shown in FIG. 9 in order to prevent the surface material from being damaged. There was a problem that the packing efficiency was poor because the pair had to be packed in the box 29. However, since the flexible sheet 26 is disposed on the surface of the building construction material 20 manufactured by the manufacturing method according to claim 5, for example, as shown in FIG. Even if the flexible sheet 26 and the wooden base material 12 of the building construction material 20 different from this are arranged so as to oppose each other and packed in the box 29, there is no risk of damaging the decorative paper 16. It is possible to provide an architectural work material set 30 that is excellent in packing efficiency and transportation efficiency.

  According to the present invention, even if the elastic adhesive layer of the bent portion is bulged outward by performing the bending process, the elastic adhesive layer itself elastically deforms and contracts to absorb the bulging output, thereby Therefore, the decorative paper can be used as a surface material.

It is sectional drawing which shows the architectural work material (a) before a bending process based on this invention, and the architectural work material (b) after a bending process. It is an expanded sectional view which shows a bending part ("X" part of Fig.1 (a)). It is an expanded sectional view which shows the other Example regarding a bending part. It is sectional drawing before the bending process (a) which shows the other Example regarding the groove | channel formed in the woody base material for building construction materials, and after the bending process (b). It is sectional drawing before the bending process (a) which shows the other Example regarding the groove | channel formed in the woody base material for building construction materials, and after the bending process (b). It is sectional drawing before the bending process (a) which shows the other Example regarding the groove | channel formed in the woody base material for building construction materials, and after the bending process (b). It is sectional drawing before the bending process regarding another Example. It is sectional drawing before the bending process regarding another Example. It is sectional drawing which shows the packing method of the conventional construction material for construction. It is sectional drawing which shows the packaging method of the construction material based on this invention. It is a figure which shows a prior art. It is a figure which shows a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, an architectural work material before bending (hereinafter, referred to as “construction material 10 before folding”) will be described with reference to FIG. 1. It is composed of a material 12, an elastic adhesive layer 14, and decorative paper 16.

  The wood substrate 12 is a wood material such as plywood, particle board, insulation board, MDF, HDF, or a plate material obtained by combining these materials. As will be described later, after the groove 18 having the V-shaped bottom portion 18a is formed in the wooden base material 12, the groove 18 is folded so as to be closed, and therefore the bending process is performed. It is preferable to use MDF or a MDF composite plywood in which MDF having a thickness of about 0.5 to 3.0 mm is laminated and integrated on the surface of the plywood because it has an easy softness.

  Further, a groove 18 having a V-shaped bottom portion 18a is provided on the back side of the wooden substrate 12 (the side opposite to the side on which the elastic adhesive layer 14 and the decorative paper 16 are disposed. The same applies hereinafter). Is formed. The shape and the like of the groove 18 will be described later. The number of grooves 18 may be one as in the prior art (FIG. 9), or may be two or more as in the present embodiment (FIG. 1). When a plurality of grooves 18 are formed, the triangular wooden substrate 12 exists between the pair of grooves 18.

  The elastic adhesive layer 14 is provided on the surface side of the above-described wooden substrate 12 and has elasticity at least during the bending process, and is 0.05 mm to 0.15 mm (preferably 0.05 to 0). .07 mm) thick adhesive layer, and as the adhesive constituting the elastic adhesive layer 14, vinyl acetate resin, aqueous vinyl urethane resin, urethane foam resin, silicon resin, hot melt resin PUR (Poly Urethane Reactive) hot melt resin (that is, “PUR adhesive”) and the like.

  If it is thinner than 0.05 mm, there is a high possibility that it will not be able to withstand the bulging output of the bent portion X. If it is thicker than 0.15 mm, it becomes difficult to form the elastic adhesive layer 14 having a uniform thickness. In addition, the decorative paper 16 is liable to be torn due to the deformation expansion of the elastic adhesive layer 14 itself.

  The decorative paper 16 is a paper material having a thickness of about 0.01 mm to 0.1 mm, on the surface of which a wood grain decorative pattern designed based on a rare and beautiful grain is printed by a gravure rotary printing technique or the like. It is. In addition, the adhesive which comprises the elastic adhesive layer 14 is previously apply | coated to the said paper material, and the adhesive which comprises the elastic adhesive layer 14 is impregnated to the paper material (the said adhesive impregnates). This is more preferable because the affinity (adhesiveness) between the decorative paper 16 and the elastic adhesive layer 14 is improved. In addition, it is preferable that the decorative paper 16 is heated to improve the permeability of the adhesive.

  Further, as the paper material, after impregnating and curing an acrylic resin or the like, a calender roll with a needle provided with a lot of fine needle-like protrusions, a flat plate with a needle, or a method such as laser irradiation or corona discharge It is also possible to use a porous resin-impregnated decorative paper having fine holes and air permeability. In this case, since the adhesive which comprises the elastic adhesive layer 14 permeate | transmits the said micropore, since the adhesive force of the decorative paper 16 and the elastic adhesive layer 14 can be strengthened more, it is suitable.

  Next, a description will be given of a procedure for constructing the above-described architectural work material 10 before bending, and thereafter, manufacturing the architectural work material 20 as a finished product by performing a bending process.

  First, the wood base 12 and the decorative paper 16 are prepared, and then the adhesive constituting the elastic adhesive layer 14 is applied to one or both of the surface of the wooden base 12 and the surface of the decorative paper 16. (Of course, the method is not limited to coating, and other methods such as spraying can be used. The same applies hereinafter).

  In detail about application | coating of an adhesive agent, when using water-based resins, such as a vinyl acetate type resin and water-based vinyl urethane-type resin, it heats to the wooden base material 12 heated to 40-60 degreeC, and 40-60 degreeC After applying a water-based resin to one or both of the decorative paper 16 using a flow coater or a roll coater, the decorative paper 16 is dried to such an extent that the water-based resin is elastic. Match. In addition to the above-described application method of the water-based resin, the resin adhesive and the decorative paper 16 may be preliminarily hot-pressed and laminated and integrated. There are various hot pressing methods such as a general roll press and a flat plate press, and a flat plate press is preferably used. The hot press is performed for 30 to 90 seconds under conditions of 100 to 130 ° C. and 0.2 to 1.0 MPa.

  In the case of a hot melt adhesive or a PUR hot melt adhesive, either one or both of the wood substrate 12 heated to 40 to 60 ° C. and the decorative paper 16 heated to 40 to 60 ° C. After applying these adhesives in a heated and melted state using a coater, roll coater, extruder, slot die, spiral spray, etc., the decorative paper 16 is made into a woody immediately (or while maintaining the molten state with a heater or the like). The substrate 12 is laminated and integrated, and then cooled and hardened to such an extent that the elastic adhesive layer 14 does not lose its elasticity completely by face-to-face deposition, a cooling roll or the like.

  After the decorative paper 16 is disposed on the surface of the wooden substrate 12 via the elastic adhesive layer 14 (or before the decorative paper 16 is disposed), the V-shaped bottom portion 18 a is formed from the back surface of the wooden substrate 12. The groove 18 is formed (the pre-bending architectural work material 10 is completed by the procedure so far).

  The groove 18 is set to “depth that cuts the wooden base material 12 but does not cut the elastic adhesive layer 14”. This point will be described in detail with reference to FIGS. 2A to 2C. The depth of the groove 18 is such that the position of the V-shaped bottom 18a in the groove 18 is elastic as shown in FIG. The adhesive layer 14 is flush with the surface facing the wood substrate 12 (in other words, the bottom 18a of the groove 18 coincides with the contact surface between the wood substrate 12 and the elastic adhesive layer 14). Is preferred).

  However, since the processing accuracy of the wood substrate 12 is about ± 0.03 mm, the position of the bottom 18a of the groove 18 is elastically bonded beyond the layer of the wood substrate 12 as shown in FIG. In a state where the adhesive layer 14 is bitten and a part of the elastic adhesive layer 14 is removed, or as shown in FIG. 2C, the bottom 18a of the groove 18 does not reach the contact surface. In some cases, the elastic base material layer 14 remains (in the case of FIG. 2 (b)), and the wooden substrate 12 is not completely cut. Since the uncut portion (= remaining portion) of the material 12 is very thin (in the case of FIG. 2C), the bending process can be performed without any problem.

  Therefore, in any case of FIGS. 2A to 2C, it is included in the “depth which cuts the wooden base material but does not cut the elastic adhesive layer” in the present invention.

  Further, the shape of the “V-shaped bottom portion 18a” may have a plane portion as shown in FIGS. 2A to 2C, or the cross-sectional shape thereof as shown in FIG. The shape may be such that is an acute angle and no planar portion exists.

  Further, various shapes of the groove 18 can be considered. For example, as shown in FIGS. 4 to 6, steps 22 are provided on both side walls sandwiching the groove 18 so that the steps 22 mesh with each other when bending is performed, as shown in FIGS. 4 to 6. May be. Moreover, by putting the adhesive 24 between the surfaces of the two steps 22 that mesh with each other, the shape of the building construction material 20 after bending can be held more firmly (the same applies to the embodiment of FIG. 1).

  Finally, after forming the groove 18 in the wooden base material 12, the construction material 20 for construction is completed by performing a bending process so as to close the groove 18 (see FIG. 1B).

  According to the present embodiment, the elastic adhesive layer 14 is provided between the wooden substrate 12 and the decorative paper 16, and the elastic adhesive layer 14 is elastic at least during the bending process. Have. For this reason, when the elastic adhesive layer 14 of the bent portion X is bulged outward by bending the V-shaped groove 18 provided in the wooden base material 12 so as to be closed, the elastic adhesive layer 14 Presses the decorative paper 16 with the swollen output, but since the elastic adhesive layer 14 has elasticity as described above, the elastic adhesive layer 14 itself receives the reaction force from the decorative paper 16. Since it contracts by elastically deforming and absorbs the swollen output, the risk of the decorative paper 16 being torn can be avoided.

  In addition, when a PUR adhesive is used as an adhesive constituting the elastic adhesive layer 14, it is bent before the PUR adhesive is completely moisture-cured and loses elasticity during the moisture-curing of the PUR adhesive. By applying the processing, not only can the decorative paper 16 be broken by the elasticity of the PUR adhesive that has been cooled and cured in an elastic state, but the folding process is completed, and the PUR adhesive is moisture-cured. After that, even if heat is applied to the PUR adhesive (= elastic adhesive layer 14), the PUR adhesive will not be softened again. 20 can be provided.

  Further, when a “thermoplastic adhesive that cures at room temperature” is used as the adhesive constituting the elastic adhesive layer 14, a necessary portion (= folded portion X) of the elastic adhesive layer 14 is required when bending is performed. By heating only the film to produce elasticity, when the bending process is not performed or for the part that does not need to be produced, the elastic adhesive layer 14 is left in a cured state (that is, no elasticity is produced). During the folding process, not only can the decorative paper 16 be broken by the elasticity of the heated thermoplastic adhesive, but also after the folding process is completed and the heating is stopped (that is, the elastic adhesive layer). When 14 becomes normal temperature), it is possible to provide the building construction material 20 that can maintain the bent shape.

  As shown in FIG. 7, a flexible sheet 26 is laminated on the surface of the decorative paper 16 via an easily peelable adhesive layer 25 so that the surface of the decorative paper 16 is conveyed during transportation of the building construction material 20 or the like. Scratches may be prevented. As such a flexible sheet 26, an easily peelable adhesive material having tackiness (adhesiveness) that can be easily peeled from the decorative paper 16 is applied to the back surface of the resin sheet (for example, stocks) [E-75M] from the company Sumilon can be used.

  Further, as shown in FIG. 8, after the folding process, a transparent coating film 28 is provided on the surface of the decorative paper 16 with a general UV curable paint, electron beam curable paint, urethane-based paint, or the like. The surface of the paper 16 may be protected.

  Conventionally, the construction material that has been subjected to bending processing is combined with L-shaped construction materials in a square shape to prevent the surface material from being damaged one by one or as shown in FIG. Thus, a set of two pieces must be packed in a box 29 to form an architectural product set, which has a problem of poor packing efficiency. However, by protecting the surface of the decorative paper 16 with the flexible sheet 26 and the transparent coating film 28 as described above, as shown in FIG. Since the decorative sheet 26 and the wooden base material 12 of the other building construction material 20 are arranged so as to oppose each other and packed in the box 29, there is no risk of damaging the decorative paper 16, so the packing efficiency and the transport efficiency It is possible to provide an architectural work material set 30 excellent in the above. Of course, the way of arranging the architectural work materials 20 is not limited to that shown in FIG. 10, and all the building work materials 20 may be arranged in the same direction.

DESCRIPTION OF SYMBOLS 10 ... Architectural construction material before bending 12 ... Wood base material 14 ... Elastic adhesive layer 16 ... Cosmetic paper 18 ... (V-shaped) groove 20 ... Architectural construction material 22 ... Step 24 ... Adhesive 25 ... Easy peeling Adhesive layer 26 ... Flexible sheet 28 ... Transparent coating 29 ... Box 30 ... Architectural product set X ... Bending part

Claims (6)

After forming an elastic adhesive layer on any one surface in the wooden substrate, disposing decorative paper on the surface of the elastic adhesive layer,
On the surface where the elastic adhesive layer is not provided in the wooden base material, a bottom portion forms a V-shaped groove,
After that, it is a manufacturing method of a building material for construction that performs the bending process so as to close the groove,
The groove is set to a depth that cuts the wooden substrate, but does not cut the elastic adhesive layer,
The method for producing a building construction material, wherein the elastic adhesive layer has elasticity at least during the bending process. The elastic adhesive layer is formed of a PUR adhesive,
In the bending process, after forming the elastic adhesive layer, the PUR adhesive is completely cured when the PUR adhesive is cured to such an extent that the flatness of the elastic adhesive layer is not lost. The method for producing a building construction material according to claim 1, wherein the method is performed. The elastic adhesive layer is formed of a thermoplastic adhesive that cures at room temperature,
2. The method for manufacturing a building construction material according to claim 1, wherein when the bending process is performed, only the folding position and its periphery are heated to cause elasticity in the thermoplastic adhesive.   By applying the adhesive constituting the elastic adhesive layer to the decorative paper in a heated state, at least a part of the surface of the decorative paper facing the elastic adhesive layer is impregnated with the adhesive. The method for producing a building construction material according to any one of claims 1 to 3, wherein:   The flexible sheet is disposed on the surface of the decorative paper through an easily peelable adhesive layer after the decorative paper is disposed and before the folding process is performed. 4. A method for producing a building construction material according to any one of 4 above. The plurality of L-shaped building construction materials produced by the production method according to claim 5, wherein the flexible sheet of one construction construction material and the wooden base material of the other construction construction material. A method for manufacturing a construction material set for construction, which is arranged so as to face each other and then packed.

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