JP7442296B2 - Building components, frames and covering sheets. - Google Patents

Description

TECHNICAL FIELD The present invention relates to building members and frames that do not cause appearance defects such as wrinkles even when covered with a covering sheet, and a covering sheet used for the building members.

Indoor walls, fittings, frames and raised frames for closet shelves, system kitchens, fixed furniture, etc. are constructed of a core material such as wood or resin material, and a surface material to decorate the core material. parts are used. As such a building member, for example, one using a resin molded plate as a surface member is disclosed (see Patent Document 1). Architectural components using resin molded plates are used for various purposes because it is easy to ensure surface hardness and surface smoothness. However, since the resin-molded board itself is expensive and large-scale equipment is required to process the resin-molded board, building components with this configuration are cheaper and require simpler manufacturing processes, such as decorative sheets. has also been proposed (see Patent Document 2). In construction components using the decorative sheet, the decorative sheet is cheaper than a resin molded board, and can easily cover the surface of the core material without special processing depending on the shape of the core material.

Japanese Patent Application Publication No. 2004-358873 JP2016-05661A

Building components using the above-mentioned decorative sheets are inexpensive and have a simple manufacturing process, but since building components are used for long periods of time, the sheets may expand or contract due to changes in temperature and humidity over time. In some cases, the surface of the sheet may be lifted, wrinkles may appear on the sheet surface, and the appearance may be poor. In particular, in a building member that has two or more plane parts and a corner formed by the plane part, the area that straddles the corner is covered with a sheet, the expansion and contraction of the member, In some cases, appearance defects may occur due to the generation of water vapor or air bubbles from the parts.

The problem to be solved by the present invention is to use a covering sheet that is inexpensive and has a simple manufacturing process, but is not likely to cause poor appearance due to lifting or wrinkles of the sheet, and when used for building components, frames, and these construction components. An object of the present invention is to provide a covering sheet that is less likely to cause poor appearance.

The present invention comprises a member having at least a first plane part, a second plane part, and a corner formed by the two plane parts, and a covering sheet covering an area spanning the corner, The above-mentioned problems are solved by a building member whose sheet has a Gurley stiffness of 10 mgf or more and a moisture permeability of 200 g/m ² ·24 h or less.

Although the building component of the present invention uses a covering sheet that is inexpensive and has a simple manufacturing process, it is less likely to suffer from poor appearance due to lifting or wrinkles of the sheet, so it can be suitably applied to various building components. In particular, the two sides of the member are easily visible and can be particularly suitably applied as a frame that is likely to suffer from poor appearance due to wrapping of the covering sheet.

FIG. 2 is a sectional view showing an example of the covering form of the building member of the present invention. FIG. 2 is a sectional view showing an example of the covering form of the building member of the present invention. FIG. 2 is a sectional view showing an example of the covering form of the building member of the present invention. FIG. 2 is a sectional view showing an example of the covering form of the building member of the present invention. FIG. 2 is a sectional view showing an example of the covering form of the building member of the present invention.

The building member of the present invention includes a member having at least a first plane part, a second plane part, and a corner formed by the two plane parts, and a covering sheet covering an area spanning the corner. , the coating sheet has a Gurley stiffness of 10 mgf or more and a moisture permeability of 200 g/m ² ·24 h or less.

The covering sheet used in the present invention has a Gurley stiffness of 10 mgf or more and a moisture permeability of 200 g/m ² ·24 h or less. By using the covering sheet, it is possible to suitably suppress the occurrence of lifting and wrinkles in the sheet even with changes in temperature and humidity over time, and it is possible to obtain a building member that does not have poor appearance.

By setting the Gurley stiffness of the covering sheet to 10 mgf or more, preferably 20 mgf or more, more preferably 50 mgf or more, and even more preferably 100 mgf or more, the member covered with the covering sheet may expand or contract, and the generation of water vapor or air bubbles may occur. At the same time, deformation of the surface of the covering sheet is less likely to occur, and the occurrence of lifting and wrinkles of the sheet can be suitably suppressed. The upper limit of the Gurley stiffness is preferably 1000 mgf or less, more preferably 500 mgf or less, and even more preferably 300 mgf or less, from the viewpoint of good coverage and workability in the region spanning the corner. preferable.

The moisture permeability of the coating sheet is 200 g/ ^m 2.24 h or less, preferably 50 g/m ^2.24 h or less, more preferably 30 g/m ^2.24 h or less, even more preferably ²⁰ g/m 2.24 h or less. Even when the moist heat environment changes, rapid fluctuations in the moisture content of the member covered with the covering sheet can be suitably suppressed, and the occurrence of lifting and wrinkles of the sheet can be suitably suppressed. The lower limit of moisture permeability is not particularly limited, and may be substantially non-permeable.

The thickness of the covering sheet used in the present invention is not particularly limited, but it should be 300 μm or less because it is easy to adjust the Gurley stiffness and moisture permeability to the above-mentioned suitable ranges, and it is easy to obtain suitable covering properties and processability. is preferable, it is more preferably 200 μm or less, and even more preferably 150 μm or less.

Examples of the base material constituting the covering sheet used in the present invention include paper base materials such as thin paper, plain paper, reinforced paper, and resin-impregnated paper, polyolefin resin sheets such as polypropylene sheets, polyethylene terephthalate sheets, and glycol-modified sheets. Resin base materials such as polyethylene terephthalate sheets (PETG sheets), polyvinyl chloride sheets, polyethylene sheets, acrylonitrile butadiene styrene sheets, etc. can be suitably used. Further, these base materials may be used by being laminated with an adhesive or an adhesive resin layer interposed therebetween.

Among these, a laminated structure in which paper base materials are laminated via a polyolefin adhesive resin layer (first paper layer/polyolefin adhesive resin layer/second paper layer), a single layer of polyolefin resin Alternatively, when a laminated sheet or the like is coated, it is preferable because it has appropriate flexibility and is easy to coat.

The covering sheet used in the present invention preferably has a decorative layer on the surface layer in order to impart a design suitable for use as a building member. The decorative layer may be provided by printing directly on the base material, or may be provided by laminating a separately decorated sheet on the base material.

Further, in order to protect the decorative layer, it is also preferable to provide a surface protective layer on the decorative layer. As the surface protective layer, a UV coat layer obtained by applying and curing an ultraviolet curable resin, a laminate layer obtained by laminating transparent resin sheets, etc. can be preferably used.

The building member of the present invention includes a member having at least a first plane part, a second plane part, and a corner formed by the two plane parts, and a covering sheet covering an area spanning the corner. This is a required building material. Examples of components covered with the covering sheet include walls, fittings, frames and rising frames of closet shelves, and core materials such as boards and pillars in decorative components of system kitchens, fixed furniture, etc. .

The components covered with the covering sheet may be wood-based members or resin-based members, but since wood-based members are easily affected by moist heat environments and are prone to expansion and contraction, this is not recommended. It is particularly easy to obtain the effect of suppressing appearance defects due to the configuration of the invention.

In particular, architectural components in which more than 50% of the surface area of the core material is covered with a single covering sheet are likely to suffer from poor appearance due to expansion or contraction of the core material, as well as generation of water vapor or air bubbles from the core material. In particular, if the structure is made of laminated wood-based materials, appearance defects are more likely to occur, such as wood veneer where the outer surface of the laminated material is medium density fiberboard (MDF) and the central laminated part is a material different from MDF. If it is made of particle board or the like, poor appearance is more likely to occur, so it is particularly easy to obtain the effect of suppressing poor appearance by the structure of the present invention. Since the larger the covered area, the more easily the effect is obtained, it is more preferable that 60% or more of the surface area of the core material be covered with a single covering sheet, and 80% or more of the core material surface area should be covered with a single covering sheet. More preferably, it is a building member covered with a covering sheet.

Examples of such architectural members include frames such as closet shelves and rising frames, and pillars of stationary furniture, etc., and the configuration of the present invention can be particularly suitably applied to the use of frames that require a suitable appearance. A suitable example of the structure of the frame includes, for example, a first plane part, a second plane part, and a third plane part as shown in FIG. A member having a first corner formed by a flat part and a second corner formed by a second flat part and a third flat part, wherein the first flat part, the first corner An example of this structure is a structure in which the second plane part, the second corner part, and the third plane part are covered with one covering sheet. The first plane part, the second plane part, and the third plane part in this configuration are defined as one of the planes formed from the length direction and height direction of a rectangular parallelepiped-shaped building member. The front and back surfaces of are the first plane part and the third plane part, and one of the upper and lower surfaces (the lower surface in FIG. 1(a)) is the second plane part. In addition, in the said structure, although the left and right side surfaces may or may not be covered with a covering sheet, when the building member is a stile, it is preferable that they are not covered. Moreover, as a modification of the configuration of FIG. 1(a), the configuration of FIG. 1(b) in which a notch is provided on the upper surface of the building member can be preferably exemplified. In the configuration in which the notch is provided, a surface having a larger area among the surfaces formed from the length direction and the height direction may be used as the first plane portion.

As modification examples of the configurations in FIGS. 1(a) and 1(b), the configuration examples in FIGS. 2 to 5 can be preferably illustrated. The configuration example shown in FIGS. 2A and 2B is a configuration in which the entire circumference of the core material is covered with one covering sheet. The configuration examples in FIGS. 3(a) and 3(b) have a corner formed by a first plane part and a second plane part, and a corner part formed by a second plane part and a third plane part. , with chamfered corners. As in the configuration example, each corner in the present invention may be a chamfered corner. The configuration example in FIG. 4 is an example of a configuration in which not the entire top surface portion is covered, but a portion is covered and a portion is not covered. As in this configuration example, the coating form of a flat part or each surface part formed by providing a notch in a flat surface may be a covering form in which the entire surface is covered, but a part is not covered. It may be a form. The configuration example shown in FIG. 5 is a configuration example in which a notch is provided so that a convex protrusion is formed on the top surface. In these configuration examples as well, the left and right side portions may or may not be covered with a covering sheet, similarly to the above.

When covering the core material with a covering sheet, it can be easily covered with an adhesive. The adhesives include urethane-based, urethane-based reactive hot melt type, rubber-based, vinyl acetate-based emulsions, α-olefin-based emulsions, vinyl copolymer resin emulsions, acrylic emulsions, ethyleneated vinyl acetate-based emulsions, and water-based vinyl. There are urethane emulsions.

(Example 1)
Two sheets of reinforced paper (basis weight 30 g/m ² , hereinafter referred to as reinforced paper (1)) were laminated with a urethane adhesive to form a covering sheet (1) provided with a white abstract pattern. The obtained covering sheet (1) was cut, and a wooden member (height 60 mm x length 250 mm x thickness 24 mm) was obtained by laminating 5.5 mm thick medium density fiberboard (MDF) on the front and back surfaces of parallel plywood (LVL). (rectangular parallelepiped shape) was covered with a covering sheet (1) using a water-based vinyl urethane emulsion adhesive to form a frame member (1). Note that this configuration corresponds to that shown in FIG. 1(a).

(Example 2)
Two sheets of reinforced paper (1) were laminated with an adhesive polyethylene resin interposed therebetween to form a covering sheet (2) provided with a white abstract pattern. A frame member (2) was formed in the same manner as in Example 1 except that the covering sheet (2) was used instead of the covering sheet (1).

(Example 3)
Olefin sheets were laminated to form an olefin doubling sheet with a thickness of 0.12 μm, and a white wood grain pattern was provided to form a covering sheet (3). A frame member (3) was formed in the same manner as in Example 1 except that the covering sheet (3) was used instead of the covering sheet (1).

(Example 4)
A frame member (4) was formed in the same manner as in Example 1 except that a 0.1 μm thick white OPP sheet was used as the covering sheet (4) instead of the covering sheet (1).

(Comparative example 1)
A covering sheet (H1) was formed by adding a white abstract pattern to the reinforced paper (1). A frame member (H1) was formed in the same manner as in Example 1 except that the covering sheet (H1) was used instead of the covering sheet (1).
(Comparative example 2)
A frame member (H2) was formed in the same manner as in Example 1, except that a 0.03 μm thick transparent CPP sheet was used as the covering sheet (H2) instead of the covering sheet (1).

The following evaluations were performed on the covering sheets and frame members of the above Examples and Comparative Examples. The results obtained are shown in the table below.

<Moisture permeability>
Samples cut into 3cm x 3cm pieces from various sheets were used to conduct tests according to JIS Z 0208 (moisture permeability measurement method for moisture-proof packaging materials (cup method)), except that the permeable area was ^4cm2 . The water vapor transmission rate was measured under conditions of 40° C. and 90% relative humidity, which corresponds to condition B.

<Gurley stiffness>
J. TAPPI Paper Pulp Test Method No. Gurley stiffness was measured according to No. 40.
J. TAPPI Paper Pulp Test Method No. 40, using a Gurley-type flexibility tester ("Gurley Flexibility Tester" Japan Tappi No. 40, manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.) at a temperature of 23°C and a relative humidity of 50%. , the average of eight measurements was taken as Gurley stiffness.

<Appearance evaluation>
The frame members formed in Examples and Comparative Examples were left standing in an environment with a temperature of 25°C and a relative humidity of 30% RH, and the appearance after 4 hours, 8 hours, 24 hours, 48 hours, and 168 hours was evaluated. confirmed. The evaluation criteria are as follows.
5 No abnormalities 4 It can be confirmed by direct inspection that the butt end surface is slightly rough. 3 It can be confirmed by direct inspection that the butt end surface is slightly rough. 2 It can be confirmed by direct inspection that the butt end surface is large and rough. Confirmed 1. Wrinkles or bulges have occurred.

1 Component 2 Covering sheet

Claims (12)

consisting of a member having at least a first plane part, a second plane part, and a corner formed by the two plane parts, and a covering sheet covering an area straddling the corner;
The coating sheet has a Gurley stiffness of 10 mgf or more and 1000 mgf or less, and a moisture permeability of 200 g/m2/24 h or less,
A building material characterized in that no wrinkles or blisters appear in its appearance after 168 hours of being left standing in an environment with a temperature of 25° C. and a relative humidity of 30% RH. The building component according to claim 1, wherein the total thickness of the covering sheet is 300 μm or less. The building member according to claim 1 or 2, wherein the covering sheet has a multilayer structure in which a first paper layer, a polyethylene adhesive resin layer, and a second paper layer are laminated in this order. The building member according to claim 3 , wherein the covering sheet further has a decorative layer on the first paper layer. The building member according to any one of claims 1 to 4, wherein the member covered with the covering sheet is a wood-based member. A frame characterized by being made of the building member according to any one of claims 1 to 5. A covering sheet that covers a region spanning the corner of a member having at least a first plane part, a second plane part, and a corner formed by the two plane parts,
The coating sheet has a Gurley stiffness of 10 mgf or more and 1000 mgf or less, and a moisture permeability of 200 g/m2/24 h or less,
A covering sheet characterized in that no wrinkles or blisters appear in appearance after 168 hours of standing in an environment with a temperature of 25° C. and a relative humidity of 30% RH. The covering sheet according to claim 7, having a total thickness of 300 μm or less. The covering sheet according to claim 7 or 8, which has a multilayer structure in which the first paper layer, the polyethylene adhesive resin layer, and the second paper layer are laminated in this order. The covering sheet according to claim 9 , further comprising a decorative layer on the first paper layer. The covering sheet according to any one of claims 7 to 10, wherein the member is a wood-based member. The covering sheet according to any one of claims 7 to 11, wherein the member is a frame.

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