JP2013113016A - Finishing structure and construction method of interior wall corner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a finishing structure and construction method of an interior wall corner which enable construction using one finishing coating material without performing substrate treatment with a putty material after reinforcing an interior wall corner with a corner material, obtain high strength, and hardly cause deformation and strength reduction due to water absorption.SOLUTION: A finishing structure of an interior wall corner is provided where a corner material is bonded to a corner of an interior surface material through an adhesion layer, a primer layer is formed on a surface opposite to a surface on which the adhesion layer of the corner material has been formed, and a finishing coating material is applied to the surfaces of the primer layer-formed corner material and the interior surface material. A construction method of an interior wall corner is provided which includes steps of forming the corner of the interior surface material, bonding and fixing the corner material to the corner through the adhesion layer, forming the primer layer on the surface opposite to the surface bonded to the corner, and applying the finishing coating material to the surfaces of the primer layer-formed corner material and the interior surface material.

Description

  The present invention relates to a finishing structure of an interior wall surface corner and a construction method of the interior wall surface corner.

  The interior wall surface of a building is finished by a dry finishing method in which wallpaper, synthetic resin cloth, or the like is applied to the surface of an interior surface material such as gypsum board, or a wet finishing method in which diatomaceous earth, mortar, or the like is applied.

  Among the interior walls, the corners (entrance / exit corners) formed by abutting the edges of the interior surface material are easy to hit, so paper, glass net tape, plastic and metal corners are used for finishing. There is a need to protect using materials.

  For this reason, as shown in FIG. 1, the corner | angular part (entrance / exit corner part) formed by abutting the edge part of the interior surface material 11 is reinforced with the corner material 12 made of synthetic resin, metal or the like. Further, after the surface of the corner material and its peripheral portion are subjected to the base treatment 13 (putty treatment) with a putty material having a thickness of about 0.5 mm or less, the finish coating material 14 (interior cloth) is applied to the base treatment 13 portion and its periphery. A method of performing finish coating by finishing or paint finishing is generally used. In FIG. 1, the corner material 12, the base treatment 13, and the finish coating material 14 are shown only halfway in the height direction of the corners so that the structure of the corners can be easily understood. It is carried out throughout the height direction of the part.

  Here, the base treatment is performed for enhancing adhesion to the finish coating material, preventing color unevenness, adjusting unevenness (processing so that there is no uneven portion on the surface), and the like.

  The corner material is generally made of synthetic resin or metal, and its surface has water repellency. For this reason, when the finish coating material is applied directly on the corner material, water draw (water absorption) is poor, and color unevenness may occur between the portion through the corner material and other portions. In addition, the adhesion between the corner material and the finish coating material is also insufficient, and it may be easily peeled off by applying a very slight force during curing or after construction. To solve these problems Conventionally, the base treatment has been an indispensable process.

  Specifically, for example, Patent Document 1 describes an example in which a surface modification layer is applied to the surface of a base material (corner material) formed of a synthetic resin in a thin plate shape, and then a base treatment is performed with a putty. Yes.

  Patent Document 2 describes an example in which a paper reinforcing tape is attached to a butt portion, and a gypsum-based thin coating base material and a finishing material are applied to the surface.

  In these conventional techniques, it is necessary to perform a ground treatment process with a putty material on a synthetic resin or paper base material (corner material), so that the process is complicated and the work is complicated. There is a problem that the number of necessary materials increases.

  In addition, depending on the combination of corner material, putty material and finish coating material (finishing material), the familiarity may become poor and surface unevenness may occur due to differences in surface conditions, etc., or peeling or cracking may occur at the interface between each member was there. This is caused by differences in material properties (strength, drying speed, dimensional change, etc.) of each material, and in order to avoid this, it is necessary to select an optimal combination, but there are many combinations, The material selection was very complicated.

  Further, in Patent Document 2, in addition to the above-described problems of the prior art, although a paper-made reinforcing tape is used as a base material, the construction is easy, but the strength is low compared to a synthetic resin or the like, and the reinforcing tape Since water absorbs water, there are problems such as a decrease in strength, swelling and warping.

Japanese Patent Laid-Open No. 10-140780 JP 2001-59324 A

  In view of the above-mentioned problems of the prior art, the present invention can be applied with a finish coating material without performing a base treatment with a putty material after being reinforced with a corner material, has high strength, and causes deformation or a decrease in strength due to water absorption. The object is to provide a difficult finish structure for corners of interior walls.

In order to solve the above problems, the present invention
In the corner formed by abutting the end of the interior face material,
A corner material having an L-shaped cross section is bonded and fixed via an adhesive layer,
On the surface opposite to the surface on which the adhesive layer of the corner material is provided, a solution-based or dispersion-based primer containing a resin polymer having an average particle size of 1 nm to 0.2 μm is used. A primer layer is formed by coating so as to be 1 g / m ² or more and 1000 g / m ² or less in terms of conversion, and finish coating is applied to the corner material on which the primer layer is formed and the surface of the interior surface material. Provided is a finishing structure for corners of an interior wall characterized by applying a material.

  According to the present invention, as a finishing structure of the interior wall surface corner portion, the corner portion formed by the interior surface material is reinforced with the corner material, and then the base coating with the putty material is not performed, and the finish coating material is used. Construction is possible. For this reason, compared with the past, a required material decreases and a work process can be decreased. Furthermore, since the work is not interrupted by the drying time of the putty material, the work time can be shortened.

  In addition, the finished structure of the corners of the interior wall surface obtained has an adhesive strength and shear strength equal to or higher than those of conventional ones, and the appearance is also swollen and warped, with no color unevenness and good right angle. can do.

Explanatory drawing of the finish structure of the conventional interior wall corner Explanatory drawing of the finishing structure of the interior wall surface corner according to the first embodiment of the present invention Explanatory drawing of the corner material used for the finishing structure of the interior wall surface corner part concerning the 1st Embodiment of this invention Explanatory drawing of the test apparatus of the adhesion test in an Example and a comparative example Explanatory drawing of the test apparatus of the shear strength test in the examples and comparative examples

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described. However, the present invention is not limited to the following embodiments, and various modifications and changes can be made to the following embodiments without departing from the scope of the present invention. Substitutions can be added.
[First Embodiment]
This embodiment demonstrates the finishing structure of the corner | surface part of an interior wall surface of this invention.

The finish structure of the interior wall surface corner portion (hereinafter also simply referred to as “corner portion”) of the present invention is a corner material having an L-shaped cross section at the corner portion formed by abutting the end portions of the interior surface material. Are bonded and fixed via an adhesive layer. Here, a solution system or dispersion system primer having an average diameter of 1 nm to 0.2 μm is applied to the surface of the corner material opposite to the adhesive layer, and the primer coating amount is 1 g / by applying so that m ² or more 1000 g / ^{m 2} or less, the primer layer is formed.

  And the finish coating material is apply | coated to the surface of the corner material in which the said primer layer was formed, and the said interior material.

  A concrete finishing structure and details of the corners of the interior wall surface will be described with reference to FIGS.

  FIG. 2 is a perspective view of the finishing structure of the corner portion of the interior wall according to the present invention. The same members as those in FIG.

  First, the structure will be described. The two interior face materials 11 are abutted so that the ends thereof are at right angles, and form corners. In addition, as a corner | angular part, any of an entering corner (concave corner | angular part) and an outgoing corner (convex corner | angular part) may be sufficient.

  And the corner material 12 is mounted | worn and fixed to the corner | angular part formed with the surface material 11 for interiors via the contact bonding layer which is not shown in figure. A primer layer (not shown) is formed by applying a primer on the surface of the corner member 12 opposite to the surface on which the adhesive layer is provided.

  Further, a finish coating material 14 is applied to the surface of the primer layer provided on the corner material surface and the surface of the interior surface material 11 around the corner material (not covered by the corner material).

  In addition, in order to show the structure of the corner portion, the corner material 12 and the finish coating material 14 are shown only up to the middle of the height direction (the direction indicated by the arrow a in the figure) in the figure, but in actuality the height It is provided over the entire direction.

  Next, each member will be described.

  First, the interior surface material 11 is not particularly limited, and various building materials can be used. Specifically, a plasterboard, a glass fiber non-woven gypsum board, a slag gypsum board, a fiber mixed gypsum board, an ALC board, a calcium silicate board, a plywood board, a cement board, a glass mat gypsum board, an extrusion molding board, or the like can be used. .

  The corner material 12 will be described with reference to FIG.

  FIG. 3A is a perspective view of a corner member, and FIG. 3B shows a structure as viewed from the upper surface side in FIG. 3A (as viewed in the direction of arrow A in the figure).

  As shown in FIG. 3, the corner member 12 has an L-shaped cross section, and has a shape corresponding to a corner (inner wall surface corner) formed by the interior surface material. The angle of the L shape is preferably 80 degrees or more and 110 degrees or less, and more preferably 87 degrees or more and 93 degrees or less.

  The material of the corner material is not particularly limited, and for example, various resins (synthetic resins), various metals, and alloys can be used.

  In particular, since the corner member 12 reinforces the corners of the interior wall surface, the corner member 12 preferably has durability and strength. For this reason, it is preferable to consist of a resin or metal integral molding.

  Examples of resins that can be preferably used as the corner material include polyethylene (PE), polypropylene (PP), poly-4-methylpentene-1 (PMP), ionomer, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), So-called general-purpose plastics such as ABS resin (acrylonitrile butadiene styrene resin), polystyrene (PS), cellulosic plastic, Teflon (registered trademark), AS resin, acrylic resin (PMMA), methacrylic acid resin, polyamide (PA), Nylon, polyacetal (POM), polycarbonate (PC), modified polyphenylene ether, thermoplastic polyester resin, polytetrafluoroethylene, fluororesin, polyphenylene sulfide, polysulfone, amorphous polyarylate, polyetherimide, poly Examples of the resin include a combination of at least one or two or more of so-called engineering plastics such as ether sulfone, polyether ketone, and polyamideimide.

  Examples of metals that can be preferably used include one of various metals such as iron, nickel, aluminum, copper, magnesium, nickel, titanium, and zinc, and various alloys such as cemented carbide, stainless steel, aluminum alloy, and magnesium alloy. Or the metal which combined 2 or more is mentioned.

  In addition, it is not necessary to consist only of either metal or resin, and it may be a composite such as a metal surface coated with resin.

  The size of the corner material is selected according to the shape of the corner, the required strength, and the like, and is not limited.

  For example, the width of the corner material (portion represented by L in FIG. 3), that is, the length of one side of the corner material, increases the strength of the corner portion and forms the corner portion to protect it. The thickness is preferably equal to or greater than the plate thickness of the interior face material 11. However, even if it is made longer than necessary to cover a portion other than the corner, there is no effect on the strength of the corner.

  In general, the plate thickness of the interior face material is 6 mm or more and 25 mm or less, and the thickness within the range of 9.5 mm or more and 15 mm or less is particularly often used. For this reason, considering the plate thickness of a commonly used interior surface material, the width of the corner material is preferably 6 mm or more and 60 mm or less, more preferably 6 mm or more and 25 mm or less, 9 It is particularly preferable that the thickness be 5 mm or more and 15 mm or less.

  The thickness of the corner member 12 (portion represented by T in FIG. 3), that is, the plate thickness, can be formed as an inclined surface so that the outer side thickness gradually decreases at both side edges. It is preferable that it is uniform as a whole. If the thickness is too thick, even after the finish coating material is applied, unevenness is generated and the appearance is deteriorated. If the thickness is too thin, the strength may be lowered. It is more preferably 1 mm or more and 1 mm or less, and particularly preferably 0.2 mm or more and 0.3 mm or less.

  When the corner portion of the interior wall surface is a protruding corner portion (convex shape), an adhesive layer 31 is provided on the inner surface (surface indicated by X in the figure) of the corresponding corner material, and is adhered to the corner portion of the interior wall surface. Is done.

  The material of the adhesive layer 31 is not limited, and any material can be used as long as the interior surface material and the corner material can be bonded with a strength that does not peel at least. Specifically, various adhesive materials such as a double-sided tape and an adhesive can be used. In addition, it is not necessary to provide an adhesive layer on the entire inner surface of the corner material, and it is sufficient that the adhesive layer is provided to such an extent that the corner material and the interior surface material can be bonded. Further, the adhesive layer can be provided in advance on the surface of the corner material, or when adhering to the corner portion, it may be provided on the corner material and / or the corresponding corner portion at the site.

  In this case, the primer layer 32 is formed on the outer surface (the surface indicated by Y in FIG. 3) of the corner member by the primer treatment.

  As the primer used for the primer treatment, for example, various primers generally used in industrial applications such as building materials can be preferably used.

  And it is preferable that the resin polymer contained in a primer consists of a thermosetting resin or a thermoplastic resin, and the primer which contains this resin polymer in a solvent can be used preferably.

  Examples of the resin polymer include acrylic-modified urethane, modified polyamide, urea, melamine, phenol, resorcinol, epoxy, urethane, so-called thermosetting resin such as structural acrylic, polyester, polyimide, polybenzimidazole, vinyl acetate, polyvinyl alcohol, So-called thermoplastic resins such as polyvinyl acetal, ethylene / vinyl acetate, vinyl chloride, acrylic, polyamide, cellulose, α-olefin, and aqueous polymer-isocyanate can be preferably used.

  More preferably, acrylic modified urethane and acrylic are mentioned.

  About a solvent, if it is a solvent generally used with a primer, it can be used without being specifically limited. For example, as a solvent type, alcohols such as water and ethanol can be used.

  Moreover, it is preferable that the solid content concentration of a primer liquid consists of 30 mass% or more and 70 mass% or less, and it is more preferable that it is 40 mass% or more and 60 mass% or less.

  Furthermore, the average particle diameter of the resin polymer of the primer is preferably 1 nm or more and 0.2 μm or less. This is because if the particle size is larger than 0.2 μm, the adhesive strength between the finish coating material and the corner material may be lowered. On the other hand, if the thickness is smaller than 1 nm, the particles easily aggregate and are difficult to handle.

  The average particle diameter in the present invention means a particle diameter at an integrated value of 50% in a particle size distribution obtained by a laser diffraction / scattering method.

The coating amount of a primer coating to the corner material in pure content terms, is preferably 1 g / ^{m 2} or more 1000 g / ^{m 2} or less. This is because when the primer coating amount is less than 1 g / m ^{2 in} terms of pure component, the adhesive strength between the corner material and the finish coating material is lowered, and there is a risk of causing cracks and uneven color on the surface of the finish coating material. Because. Moreover, since it is ineffective even if it apply | coats excessively and it is a problem on cost, it is preferable that it is 1000 g / m < ² > or less. Furthermore, the primer coating amount in terms of the pure content is more preferably 30 g / m ² or more and 100 g / m ² or less.

  The pure content conversion is calculated by the following conversion formula. In the formula, the primer pure content indicates the concentration (% by weight) of the resin polymer contained in the primer solution.

Pure component conversion (g / m ² ) = primer coating amount (g / m ² ) × primer pure component ÷ 100
The primer treatment applied to the corner material may be applied to the corner material in advance, or may be applied to the corner material at the site when the corner portion (the entrance / exit corner portion) is processed.

  Furthermore, it is preferable that a glass tape is affixed on the primer layer (before applying the finish coating material). This is because the strength can be increased by further attaching a glass tape to the surface of the corner material. In this case, a finish coating material is applied to the surface of the corner material on which the primer layer is formed and the glass tape is affixed, and the interior surface material.

  The size and type of the glass tape to be used are not limited, but if the thickness is too thick, the appearance is affected, and if it is too thin, there is no effect, so the thickness is 0.05 mm or more and 0.5 mm or less. It is preferably 0.1 mm or more and 0.3 mm or less.

  Heretofore, the case where the corner portion is the protruding corner portion (convex shape) has been described as an example, but the present invention can be similarly applied to the case where the corner portion is the corner portion (concave shape). However, if the corner is a corner (concave), the outer surface of the corner material (Y surface in FIG. 3) is the surface to be bonded to the interior surface material (corner portion), and the inner surface (see FIG. X side in 3) is the surface to which the finish coating material is applied. Therefore, the adhesive layer is formed on the Y plane in FIG. 3 and the primer layer is formed on the X plane in FIG. 3, that is, the adhesive layer is 32 and the primer layer is 31 in FIG. Other than this configuration, the configuration is the same as that described above.

  Next, the finish coating material 14 will be described. First, as finish coating materials, for example, finish coating materials such as cement-based, gypsum-based, slaked lime (plaster) / dolomite plaster-based, and resin-based are known. Specific components include calcined gypsum or calcium carbonate as a main raw material, a binding material, and a coated wall material mixed with admixtures, thickeners, setting retarders, water and the like as necessary ( JIS A 6909).

  The cement-based finish coating material refers to a finish coating material obtained by mixing cement as a binder or a polymer dispersion for mixing cement with it.

  In addition, gypsum is a plaster as a binder, slaked lime (plaster) and dolomite plaster are slaked lime and / or dolomite as a binder, and a resin is a synthetic resin, synthetic resin emulsion, water-soluble as a binder. The finish coating material which uses what mixed synthetic resin emulsion in water-soluble resin or water-soluble resin, respectively.

  In the present invention, the finishing coating material is preferably one selected from cement-based finishing coating materials, gypsum-based finishing coating materials, slaked lime (plaster) / dolomite plaster finishing coating materials, and resin-based finishing coating materials.

  The ratio of various components in the finish coating material is not limited, and can be selected depending on required strength, appearance, and the like.

  For example, when a gypsum-based finish coating material is used, 13 to 20 parts by weight of an inorganic admixture per 100 parts by weight of calcined gypsum, and 1 to 3 parts by weight (per 100 parts by weight of calcined gypsum) The additive material can be contained.

  For example, when a resin-based finish coating material is used, 10 to 30 parts by weight of an inorganic admixture per 100 parts by weight of calcium carbonate, and 1 part by weight (per 100 parts by weight of calcium carbonate) The additive may be contained in an amount of 5 parts by weight or less.

  Here, it is preferable to use at least one of lightweight aggregate and clay material as the inorganic admixture. As the lightweight aggregate, perlite, vermiculite, shirasu balloon, and glass balloon can be preferably used. Moreover, as a clay material, what contains diatomaceous earth, quartz sand, and calcium carbonate can be used preferably.

  As the additive, at least one selected from powdered or granular water-soluble resins, fibrous substances, inorganic or organic pigments, and organic acids can be preferably used.

  As the water-soluble resin, for example, vinyl acetate, polyvinyl alcohol, methyl cellulose, and acrylic acid resin can be preferably used. Glass fibers and nylon fibers can be preferably used as the fibrous material, and titanium oxide and carbon can be preferably used as the inorganic or organic pigment. As the organic acid, malic acid, citric acid, succinic acid, or the like can be preferably used.

  And in order to make the finishing structure of an interior wall surface corner into a required appearance, at least one kind of finishing material selected from paint, cloth, and wet coating material can be further provided on the finishing coating material.

  In the finishing structure of the interior wall surface corner of the present invention described above, after the corner of the interior wall surface is reinforced with a corner material, the construction with one finish coating material is performed without performing the ground treatment with the putty material. Is possible. For this reason, compared with the past, a required material decreases and a work process decreases. In addition, the work can be performed without being interrupted by the drying time of the putty material, and the work period can be shortened.

Furthermore, the finished structure of the corners of the interior wall surface obtained has an adhesive strength and shear strength equal to or higher than those of the conventional one, and the appearance is also swelled and warped, with no color unevenness and good right angle. can do.
[Second Embodiment]
In the embodiment of the present invention, a method for constructing the corners of the interior wall surface will be described.

  The interior wall surface corner construction method of the present invention includes the following steps.

It is a construction method of a corner portion formed by abutting the end portions of the interior face material,
A step of forming a corner portion by abutting the end portions of at least two interior surface materials, a step of bonding and fixing a corner material having an L-shaped cross section to the corner portion via an adhesive layer, and a corner material A primer containing a resin polymer having an average particle diameter of 1 nm or more and 0.2 μm or less on the surface opposite to the surface to be bonded to the corner portion is applied in an amount of 1 g / m ² or more and 1000 g / m in terms of pure content. a step of applying a primer layer so as to be equal to or less than m ^2, a step of applying a finish coating material to the surface of the corner material on which the primer layer is formed and the interior surface material.

  The steps described above need not be performed in that order. For example, the step of forming the primer layer is performed by previously applying a primer to the surface of the corner material before bonding the corner material to the corner. Also good.

  The structure of the interior wall corner obtained by the above construction method is the same as the finish structure of the interior wall corner described in the first embodiment. That is, the structure shown in FIG. 2 is obtained.

  According to the above construction method, conventionally, when the corner of the interior wall surface was constructed, after the corner material was bonded to the corner, a ground treatment with the putty material was necessary. The finish coating material can be directly applied to the primer layer formed in step (b).

  For this reason, there are fewer work processes than the conventional construction method, and it becomes possible to construct simply. In addition, the time for applying and drying the putty material can be omitted, which leads to shortening of the construction period. Furthermore, since it is possible to construct with a single finish coating material after bonding the corner material, the number of necessary materials is reduced. Even though the work process can be shortened in this way, the corners of the interior wall surface obtained have adhesive strength and shear strength equal to or higher than those of conventional ones, and the appearance is also swollen and warped, color There can be no unevenness and good right angleness.

  Each member will be described below.

  First, as described in the first embodiment, the corner member is a member having a L-shaped cross section (see FIG. 3).

  Although the material, size, etc. are not specified, it is preferable to have a resin or metal integrally molded product because it is preferable to have durability and strength.

  In addition, the width of the corner material (the portion represented by L in FIG. 3), that is, the length of one side of the corner material, increases the strength of the corner and protects it. The thickness is preferably equal to or greater than the plate thickness. However, even if it is made longer than necessary to cover a portion other than the corner, there is no effect on the strength of the corner. For this reason, for example, considering the plate thickness (6 mm or more and 25 mm or less, particularly 9.5 mm or more and 15 mm or less) of a commonly used interior surface material, the width of the corner material is 6 mm or more and 60 mm or less. It is preferably 6 mm or more and 25 mm or less, and particularly preferably 9.5 mm or more and 15 mm or less.

  As the thickness of the corner material 12 (portion represented by T in FIG. 3), if it is too thick, irregularities are generated even after the finish coating material is applied, and the appearance is impaired, and if it is too thin, the strength may decrease. For this reason, the thickness is preferably 0.05 mm or more and 2 mm or less, more preferably 0.1 mm or more and 1 mm or less, and particularly preferably 0.2 mm or more and 0.3 mm or less.

  Next, the primer used when forming the primer layer is not particularly limited, and for example, various primers used in industrial applications such as building materials can be preferably used.

  The resin polymer contained in the primer is preferably made of a thermosetting resin or a thermoplastic resin, and a primer containing the resin polymer in a solvent can be preferably used.

  Examples of the resin polymer contained in the primer include so-called thermosetting resins such as acrylic-modified urethane, modified polyamide, urea, melamine, phenol, resorcinol, epoxy, urethane, structural acrylic, polyester, polyimide, and polybenzimidazole, or acetic acid. So-called thermoplastic resins such as vinyl, polyvinyl alcohol, polyvinyl acetal, ethylene / vinyl acetate, vinyl chloride, acrylic, polyamide, cellulose, α-olefin, and aqueous polymer-isocyanate can be preferably used.

  About a solvent, if it is a solvent generally used with a primer, it can be used without being specifically limited.

  The average particle size of the resin polymer of the primer is preferably 1 nm or more and 0.2 μm or less. This is because if the particle size is larger than 0.2 μm, the adhesive strength between the finish coating material and the corner material may be lowered. On the other hand, if the thickness is smaller than 1 nm, the particles easily aggregate and are difficult to handle.

It is preferable that the application amount of the primer applied to the corner material is 1 g / m ² or more and 1000 g / m ² or less in terms of pure content. This is because if the primer coating amount is less than 1 g / m ^{2 in} terms of pure content, the adhesive strength between the corner material and the finish coating material may be reduced. Moreover, since it will become thick when it apply | coats excessively and a primer layer may produce in a layer, it is preferable that it is 1000 g / m < ² > or less. Furthermore, the primer coating amount in terms of the pure content is more preferably 30 g / m ² or more and 100 g / m ² or less.

  And the process of affixing a glass tape on the surface of the said primer layer can also be provided before the process of apply | coating a finish coating material to surfaces, such as a primer layer. It is preferable to perform such a process because the strength of the corners (corners) is increased.

  When the step of forming the primer layer in advance is performed before the corner material is pasted on the corner, the step of pasting the glass tape may be performed in advance, or the corner material is pasted on the corner. Then, you may perform the process after performing a primer layer formation process.

  The size and type of the glass tape to be used are not limited, but if the thickness is too thick, the appearance is affected, and if it is too thin, there is no effect, so the thickness is 0.05 mm or more and 0.5 mm or less. It is preferably 0.1 mm or more and 0.3 mm or less.

  Next, as the finish coating material, it is preferable to use one selected from cement-based finish coating materials, gypsum-based finish coating materials, slaked lime (plaster) / dolomite plaster-based finish coating materials, and resin-based finish coating materials. .

  The ratio of various components in the finish coating material is not limited, and can be selected depending on required strength, appearance, and the like.

  For example, when a gypsum-based finish coating material is used, 13 to 20 parts by weight of an inorganic admixture per 100 parts by weight of calcined gypsum, and 1 to 3 parts by weight (per 100 parts by weight of calcined gypsum) The following additives can be contained.

  For example, when a resin-based finish coating material is used, 10 parts by weight or more and 30 parts by weight or less of an inorganic admixture per 100 parts by weight of calcium carbonate, and 1 part by weight (per 100 parts by weight of calcium carbonate) The additive can be contained in an amount of 5 parts by weight or more and 5 parts by weight or less.

  Here, it is preferable to use at least one of lightweight aggregate and clay material as the inorganic admixture. As the lightweight aggregate, perlite, vermiculite, shirasu balloon, and glass balloon can be preferably used. Moreover, as a clay material, what contains diatomaceous earth, quartz sand, and calcium carbonate can be used preferably.

  As the additive, at least one selected from powdered or granular water-soluble resins, fibrous substances, inorganic or organic pigments, and organic acids can be preferably used.

  As the water-soluble resin, for example, vinyl acetate, polyvinyl alcohol, methyl cellulose, and acrylic acid resin can be preferably used. Glass fibers and nylon fibers can be preferably used as the fibrous material, and titanium oxide and carbon can be preferably used as the inorganic or organic pigment. As the organic acid, malic acid, citric acid, succinic acid or the like can be preferably used.

  In the finish structure of the interior wall corner portion of this embodiment, in order to obtain a required appearance, after the step of applying the finish coating material, the paint is selected from paint, cloth, and wet coating material on the finish coating material. It is also possible to perform a step of constructing at least one kind of finishing material.

  The other rules for each member such as the interior surface material, the corner material, the adhesive layer, the primer layer, and the finish coating material are the same as those described in the first embodiment, and thus the description thereof is omitted here.

  Specific examples will be described below, but the present invention is not limited to these examples.

  Test specimens were prepared according to the conditions of each test method described below and the conditions described in the following examples and comparative examples, and performance evaluation was performed.

  Since the corner material type, the surface treatment of the corner material, and the base treatment (putty treatment) differ depending on each example and comparative example, they are described collectively below.

In addition, since the size and conditions of a test body differed with each test, even if it is the same Example and a comparative example, the test body was produced for every test and it used for each performance test.
(Adhesive strength test)
The adhesion strength between the corner material and the finish coating material was measured according to JIS A 6909 “Adhesion Strength Test”.

  The test specimen and measurement method will be described with reference to FIG.

  As a test body, the surface coating material 43 was coated with a finish coating material 43 and dried.

  The corner material 42 is subjected to surface treatment and / or putty treatment in accordance with the conditions shown in the following examples and comparative examples, and then the finish coating material is similarly applied according to the conditions described in the examples and comparative examples. 43 is applied and dried.

  And the attachment (tool) 41 was set and fixed to the upper and lower surfaces of the test body including the corner material 42 and the finish coating material 43 with an adhesive, and pulled up and down, and the maximum tensile load was measured.

At this time, 0.4 N / mm ² or more was accepted and less than 0.4 N / mm ² was rejected.

  In addition, the fracture state after the adhesive strength test was examined, and the ratio of interface peeling and material fracture was also examined.

  The ratio of interfacial debonding and material breakage was defined by the area of the finish coating material that remained (attached) on the upper attachment after the adhesive strength test. Specifically, out of the area of the total finish coating material, it peels at the interface between the corner material and the finish coating material, the area ratio of the finish coating material adhering to the upper attachment after the test is the interface peeling, and the rest is the material fracture It becomes the ratio of.

Interfacial peeling is peeling at the interface between the corner material and the finish coating material, and the lower the adhesive strength between the two, the easier the interface peeling occurs. For this reason, it is shown that the corner material and the finish coating material were strongly bonded as the interface peeling ratio was low.
(Shear strength test)
The shear strength between the corner material and the finish coating material was measured by the following method.

  First, the preparation procedure of the test body 50 will be described with reference to FIG. The two gypsum boards 51 with an edge length of 200 mm x width 100 mm x thickness 9.5 mm are butted together (the part indicated by 52 in FIG. 5 (a)), and the overall size is 200mm length x width. Set to 200 mm.

  Next, an epoxy resin was applied to half (the portion indicated by 54 in FIG. 5A) of the back surface of the corner material 53 having a length of 200 mm and a width of 100 mm, and attached to one side of the gypsum board. In this test, a flat corner material was used for the convenience of the test apparatus. Moreover, the material of the corner material here uses the material of the material described in the following Examples and the comparative examples, respectively.

  Then, after performing surface treatment and / or ground treatment (putty treatment) according to the conditions described in the following examples and comparative examples, the entire surface of the corner material and the plaster board (the entire surface provided with the corner material) A test specimen 50 was prepared by applying and drying a gypsum-based finish coating material under the conditions described in Examples and Comparative Examples.

  The obtained test body 50 was set in a test apparatus, and the shear strength was measured.

  A schematic diagram of the test apparatus is shown in FIG. FIG. 5B shows a front view and a cross-sectional view of the test apparatus.

The test apparatus is composed of two members 55 and 56 each having a tension part for applying a force in the vertical direction and a test body holding part for fixing the test body. The test body 50 produced by the above-described process is set on the test body holding portion of the test apparatus so that the gypsum board butting portion 52 comes to the center of the test apparatus, and is fixed to the test apparatus by the fixing member 57. Next, the tensile portion of the test apparatus was pulled in the direction of the arrow in the figure, and the shear strength was measured. The thing of 15 N / cm or more was set as the pass, and the thing less than 15 N / cm was set as the failure.
(Surface condition evaluation)
Regarding the surface state, a finished structure of the corner portion of the interior wall material was actually produced, and the appearance was evaluated.

  Specifically, first, two plaster boards each having an edge length of 200 mm, a width of 100 mm, and a thickness of 9.5 mm were combined to produce a protruding corner.

  Then, a corner material is affixed to the protruding corner with double-sided tape according to the conditions of the following examples and comparative examples, and surface treatment and / or putty treatment is performed according to the conditions of each example and comparative example. did.

  Thereafter, a finish coating material was applied and dried under the conditions described in the following Examples and Comparative Examples to prepare test specimens.

The surface state of the finished specimen was observed, and the swelling, warpage, and surface unevenness were visually confirmed and evaluated.
(Comprehensive judgment)
Comprehensive judgment is acceptable for any test specimens that do not fail in the above adhesive strength test, shear strength test, blister / warp judgment, surface color unevenness judgment, and right-angle judgment. About what there is, it was rejected.

  Below, the corner material in each Example and a comparative example, the processing method of the surface of a corner material, and the application | coating conditions of a finish coating material are demonstrated.

Example 1
A corner material made of polyvinyl chloride having a thickness of 0.8 mm was used, and the surface thereof was treated with a primer containing a modified urethane having an average particle size of 0.05 μm as a resin polymer to form a primer layer. The primer coating amount at this time was 75 g / m ² in terms of pure content.

  Then, 3 mm of a gypsum-based finish coating material (trade name: Kencoat α) manufactured by Yoshino Gypsum Co., Ltd. was applied on the primer layer, left in the room for 24 hours, and then dried to a constant weight with a 40 ° C. dryer.

  The performance test was performed on the obtained specimen. The results are shown in Table 1.

  According to Table 1, the adhesiveness was sufficient, and the design of the appearance such as color unevenness and warpage was satisfied without any problem, and the right-angled standard required at the corner was satisfied.

(Example 2)
A test specimen was prepared in the same manner as in Example 1 except that a primer containing acrylic having an average particle diameter of 0.05 μm was used as the resin polymer. In addition, the primer application quantity at the time of forming a primer layer was 75 g / m < ² > in conversion of the pure part.

  The above-mentioned performance evaluation was performed on the obtained specimen. The results are shown in Table 1.

  According to Table 1, good results were obtained for all items as in Example 1.

(Example 3)
A glass mesh having a thickness of 0.3 mm is pasted on the same corner material made of polyvinyl chloride as in Example 1, and a modified urethane having an average particle diameter of 0.05 μm as a resin polymer is applied thereon as in Example 1. A primer layer was applied to form a primer layer. The primer coating amount at this time was 75 g / m ² in terms of pure content.

  And the finish coating material was apply | coated and dried on the primer layer by the same procedure as Example 1, and the said performance test was done about the obtained test body. The results are shown in Table 1.

  According to Table 1, it had sufficient adhesiveness and higher shear strength was obtained. In addition, the design of the appearance such as color unevenness and warp satisfied the right-angled standard required for the corner without any problems.

(Comparative Example 1)
The same corner material made of polyvinyl chloride as in Example 1 was used, but the primer layer was not formed, and the base coating was not performed, and the finish coating material was directly applied and dried under the same conditions as in Example 1. . The results of the performance test are shown in Table 1.

  According to Table 1, the ratio of interfacial peeling was as high as 85%, and most of the peeling occurred at the interface between the corner material and the finishing material, and the adhesiveness was insufficient.

(Comparative Example 2)
As the corner material, the same polyvinyl chloride as in Example 1 was used. Then, after a ground treatment was performed with a commercially available gypsum-based putty material (trade name: GL putty manufactured by Yoshino Gypsum Co., Ltd.), the finish coating material was applied and dried in the same manner as in Example 1. The performance evaluation results are shown in Table 1.

  According to Table 1, although there is a certain degree of adhesive strength, it can be seen that the ratio of interfacial delamination is high and is partially delaminated at the interface. Further, a difference in water absorption occurred due to the part of the putty material, and color unevenness occurred on the surface of the finished material.

(Comparative Example 3)
As the corner material, the same polyvinyl chloride material as in Example 1 was used, and as in Example 1, a primer containing a modified urethane having an average particle size of 0.05 μm as a resin polymer was applied to form a primer layer. did. Thereafter, a ground treatment was performed with a commercially available gypsum-based putty material (trade name: GL putty manufactured by Yoshino Gypsum Co., Ltd.).

  Next, the finish coating material was applied and dried under the same conditions as in Example 1. The performance evaluation results are shown in Table 1.

  According to Table 1, although there was no problem in adhesion, color unevenness occurred on the surface of the finishing material due to the difference in water absorption. Further, since the putty treatment was performed with a material different from the finish coating material, sufficient shear strength could not be obtained.

(Comparative Example 4)
A paper tape (Tiger joint tape manufactured by Yoshino Gypsum Co., Ltd.) having a thickness of 0.3 mm was used as the corner material. The surface treatment and the base treatment were not performed, and the finish coating material was directly applied and dried under the same conditions as in Example 1. The performance evaluation results are shown in Table 1.

  According to Table 1, although there was no problem with adhesiveness, problems such as swelling and warping due to water absorption of the paper occurred.

(Comparative Example 5)
As the corner material, a mesh-like glass tape (Tiger G fiber tape manufactured by Yoshino Gypsum Co., Ltd.) having a thickness of 0.2 mm was used. The surface treatment and the base treatment were not performed, and the finish coating material was directly applied and dried under the same conditions as in Example 1. The performance evaluation results are shown in Table 1.

  Since a mesh-like glass tape is used as the corner material, the protruding corner cannot be completely covered. For this reason, when the cut surface of a gypsum board is constructed in a corner | angular part, the color nonuniformity by the difference in water absorption tends to generate | occur | produce between the part which hits the cut surface of a gypsum board, and the other surface.

  Further, since the corner material is a flexible material, it reflects the shape of the base, making it difficult to form a right-angled shape necessary for the protruding corner.

(Comparative Example 6)
A test body was prepared in the same manner as in Example 1 except that a primer layer was formed using a primer containing acrylic having an average particle size of 0.3 μm as a resin polymer, and the performance test was performed. The results are shown in Table 1. In addition, the primer application quantity at the time of forming a primer layer was 75 g / m < ² > in conversion of the pure part.

  Since the average particle size of the resin polymer contained in the primer was as large as 0.3 μm, the adhesive strength was below the reference value and the shear strength was insufficient.

(Comparative Example 7)
The same polyvinyl chloride corner material as in Example 1 was used. And the primer layer was formed using the acrylic whose average particle diameter is 0.1 micrometer as a primer. The primer coating amount at this time was 75 g / m ² in terms of pure content.

  Subsequently, after ground-treating with a commercially available gypsum-based putty material (trade name: GL putty manufactured by Yoshino Gypsum Co., Ltd.), the finish coating material was applied and dried under the same conditions as in Example 1. The performance evaluation results are shown in Table 1.

  According to Table 1, the adhesive strength was not less than the reference value, but the shear strength was insufficient, and color unevenness occurred on the surface of the finished product due to the difference in water absorption.

11 Interior material 12 Corner material 14 Finish coating material

Claims (18)

In the corner formed by abutting the end of the interior face material,
A corner material having an L-shaped cross section is bonded and fixed via an adhesive layer,
On the surface opposite to the surface on which the adhesive layer of the corner material is provided, a solution-based or dispersion-based primer containing a resin polymer having an average particle size of 1 nm to 0.2 μm is used. A primer layer is formed by coating so as to be 1 g / m ² or more and 1000 g / m ² or less in terms of conversion,
A finishing structure of a corner portion of the interior wall surface, wherein a finish coating material is applied to the surface of the corner material on which the primer layer is formed and the interior surface material.   The finished structure of the corner portion of the interior wall surface according to claim 1, wherein the corner material is an integrally molded product of resin or metal.   The finished structure of the corners of the interior wall surface according to any one of claims 1 and 2, wherein the corner member has a thickness of 0.05 mm to 2 mm.   The finished structure of the corner portion of the interior wall surface according to any one of claims 1 to 3, wherein the resin polymer is made of a thermosetting resin or a thermoplastic resin.   The finish coating material is a kind selected from a cement-based finishing coating material, a gypsum-based finishing coating material, a slaked lime (stucco) / dolomite plaster finishing coating material, and a resin-based finishing coating material. Item 5. The finished structure of the corner of the interior wall according to any one of Items 1 to 4.   The gypsum-based finish coating material contains 13 to 20 parts by weight of an inorganic admixture and 1 to 3 parts by weight of an additive per 100 parts by weight of calcined gypsum. Item 6. The finished structure of the corner of the interior wall according to Item 5.   The resin-based finish coating material contains 10 to 30 parts by weight of an inorganic admixture per 100 parts by weight of calcium carbonate and 1 to 5 parts by weight of an additive. Item 6. The finished structure of the corner of the interior wall according to Item 5.   The finished structure of the corner portion of the interior wall surface according to claim 6 or 7, wherein at least one of a lightweight aggregate or a clay material is used as the inorganic admixture.   9. The additive according to claim 6, wherein the additive is at least one selected from a powdery or granular water-soluble resin, a fibrous material, an inorganic or organic pigment, and an organic acid. Finished structure of the corner of the interior wall as described in. Glass tape is affixed on the primer layer,
10. The finish coating material is applied to a surface of the corner material on which the primer layer is formed and the glass tape is pasted, and the interior surface material. Finished structure of the corner of the interior wall.   11. The finishing structure of an interior wall corner according to claim 1, wherein at least one finishing material selected from paint, cloth, and wet coating material is provided on the finishing coating material. . A method of constructing a corner formed by abutting the end portions of the interior face material, the step of forming a corner portion by abutting the end portions of at least two interior face materials,
A step of bonding and fixing a corner material having an L-shaped cross section to the corner portion via an adhesive layer;
A primer containing a resin polymer having an average particle diameter of 1 nm or more and 0.2 μm or less is applied to the surface of the corner material opposite to the surface to be bonded to the corner, and the application amount is 1 g / m ² or more in terms of pure content. Applying the primer layer to 1000 g / m ² or less and forming a primer layer;
An interior wall surface corner construction method comprising a step of applying a finish coating material to the surface of the corner material on which the primer layer is formed and the interior surface material.   13. The construction method for corners of an interior wall surface according to claim 12, wherein the corner material is an integrally molded product of resin or metal.   14. The method for constructing a corner portion of an interior wall according to claim 12, wherein the corner member has a thickness of 0.05 mm to 2 mm.   The interior resin wall corner construction method according to any one of claims 12 to 14, wherein the resin polymer is made of a thermosetting resin or a thermoplastic resin.   The finish coating material is a kind selected from a cement-based finishing coating material, a gypsum-based finishing coating material, a slaked lime (stucco) / dolomite plaster finishing coating material, and a resin-based finishing coating material. The construction method of the interior wall surface corner according to any one of Items 12 to 15.   The method for constructing a corner portion of the interior wall surface according to any one of claims 12 to 16, further comprising a step of applying a glass tape on the primer layer before the step of applying the finish coating material.   18. The method of applying at least one finishing material selected from paint, cloth, and wet coating material on the finishing coating material after the step of applying the finishing coating material. The construction method of the interior wall corner according to any one of the above.

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