JP2015067988A - Base material for door, and decorative material for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base material for a door, which can make surface smoothness of a grip part proper, and a decorative material for the door.SOLUTION: A base material 1 for a door comprises a wood base plate having one or more layers, and a recess-shaped grip part 3 for being hooked on fingers in opening/closing of a door is formed in a body part 2. The density of at least a bottom surface part Bo, which is elongated along a rear surface Ba of the body part 2, of a surface of the grip part 2 is 0.8 g/cmor more.

Description

  The present invention relates to a door base material and door decorative material used for an entrance door, a sliding door, and the like in an entrance, a cupboard, a wash basin, a storage furniture, and the like, and in particular, a plate made of a wooden substrate without a handle portion by metal fittings. The present invention relates to a handle door base material and a door decorative material in which a concave handle portion on which a finger hangs when the door is opened and closed is formed on the main body.

  As this type of door base material, a substrate having a concave handle 101 formed at the end of a plate-like main body 102 as shown in FIG. The handle 101 includes a front side edge 103, a rear side edge 104, and a concave groove 105 formed between the front side edge 103 and the rear side edge 104. The main body 102 is opened and closed by hooking a finger on the body. The door decorative material is obtained by adhering a decorative sheet 106 to the surface of the door base material 100 in order to improve the appearance of the door (see, for example, Patent Document 1).

  As the door base material 100 having the above-described structure, a rectangular wooden substrate 107 such as an MDF (medium density fiberboard) shown in FIG. 10 is prepared, and one end 107A of the wooden substrate is used with a molder, a tenoner, or the like. It is formed by cutting into a shape (concave shape) of the handle portion 101.

Japanese Patent No. 4725303

  However, when the handle portion 101 is formed by the above method, fuzz or brushing is likely to occur on the surface of the handle portion 101, particularly the surface 104A of the rear side edge portion 104, and as a result, the surface state becomes uneven and smooth. There is a problem of getting worse. The surface unevenness of the handle portion 101 is difficult to be smoothed even when polishing using a baffle or the like is performed. On the other hand, when the decorative sheet 106 is pasted with the surface unevenness, the surface unevenness of the decorative sheet 106 follows the surface unevenness. Unevenness or deformation occurs on the surface. In particular, in the case of the decorative sheet 106 having a mirror surface, the unevenness on the surface of the sheet is very conspicuous, so that the design of the decorative sheet 106 is greatly reduced. Since the surface 104A easily enters the user's field of view when the door 100 is viewed from the front side, it greatly affects the visual impression.

  As a result of the present inventors' extensive research, the above-mentioned problem is that the density of the wood substrate such as MDF changes in the thickness direction. Has a property of low density, and when a low density portion is exposed by cutting, it is found that the surface of the cutting process is uneven due to fluffing, crusting, and the like. Since the surface of the side edge portion 104 is cut so that it hits the region where the density of the wooden substrate is low, good smoothness cannot be obtained, and even if the portion where the base material density is low is buffed, It was found that a smooth surface could not be obtained due to the occurrence of crepes.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a door base material and a door decorative material capable of improving the surface smoothness of the handle portion.

The object of the present invention is a base material for a door comprising a single-layer or a plurality of layers of a wooden substrate, and a concave handle portion on which a finger is hooked when the door is opened and closed on a plate-like main body portion. Among these, the density of the bottom surface portion extending at least along the rear surface of the main body portion is achieved by a door base material having a density of 0.8 g / cm ³ or more.

In a preferred embodiment of the door base material having the above-described configuration, the density of both surfaces of the back-side wood substrate, which is composed of a plurality of layers of wood substrate and one surface forms the rear surface of the main body, is 0.8 g / cm ³ or more. The grip portion is formed such that a part of the other surface of the wood substrate on the rear surface side becomes the bottom surface portion.

In a more preferred embodiment, it is composed of three or more layers of wood substrate, and the density of both surfaces of the front-side wood substrate, one surface of which forms the front surface of the main body, is 0.8 g / cm ³ or more. Yes.

  In a further preferred embodiment, the grip portion includes a front side edge that is continuous with the front surface of the main body, a rear side edge that is continuous with the rear surface of the main body, the front side edge, and the rear side edge. It is characterized by being formed by a concave groove between the parts.

  In a more preferred embodiment, the wood substrate is a medium density wood fiber board (MDF), a high density wood fiber board (HDF), or a particle board (PB).

  The object of the present invention is also achieved by a door decorative material in which a decorative sheet is attached to the surface of the door base material having the above-described configuration.

  In a preferred embodiment of the door decorative material having the above structure, the gloss value of the decorative sheet measured according to JIS Z-8741-1997 is 60 or more.

  According to the present invention, since the surface smoothness of the handle portion can be improved, unevenness and deformation are unlikely to occur on the surface of the decorative sheet, and the design of the decorative sheet can be improved.

It is a perspective view of a door concerning one embodiment of the present invention. It is sectional drawing of the handle part of the door of FIG. It is sectional drawing of the edge part of a material base material. It is sectional drawing of the handle part of the door which concerns on other embodiment. It is sectional drawing of the handle part of the door which concerns on other embodiment. It is a graph which shows the density distribution along the thickness direction of a MDF base material. It is sectional drawing explaining the other formation method of the handle part of a door. It is sectional drawing explaining the other formation method of the handle part of a door. It is sectional drawing of the handle part of the door of a comparative example. It is sectional drawing of the edge part of the material base material used as the material of the door of a comparative example.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an appearance of a door decorative material 10 according to an embodiment of the present invention, and FIG. 2 shows an enlarged cross-sectional structure of a handle portion 3 of the door decorative material 10 of FIG. . The door decorative material 10 is used for doors in entrances, cupboards, washstands, storage furniture, etc., and can be used as a double door as a pair, or as a single door. Can also be used. Further, it can be used not only as an opening door but also as a sliding door. The door decorative material 10 refers to a material in which a decorative sheet 4 and an edge tape 5 are bonded to the surface (front and rear side surfaces) and upper and lower end surfaces of the door base material 1.

  The base material 1 for doors consists of a 1 layer or multiple layer wooden substrate (henceforth "material base material M"), and when it consists of a multiple layer wooden substrate, a multiple layer wooden substrate is used as an adhesive agent. It is made by pasting together. As shown in FIG. 2, the door base material 1 of the present embodiment is formed by laminating two kinds of wood base materials A and B in three layers, and the wood substrate A is thinner than the wood substrate A 2. It is sandwiched between two wooden substrates B. Examples of the wood substrates A and B include wood fiber boards and particle boards (PB). The wood fiber boards include medium density wood fiber boards (MDF) and high density wood fiber boards (HDF). is there.

  Although the thickness D of the base material 1 for doors is not specifically limited, It is preferable that it is 15 mm or more. When the thickness D of the base material 1 for doors is smaller than 15 mm, the door becomes too thin, so that its durability (physical strength) is weakened. For example, it may be inferior in impact resistance, and when the door is attached. This is because the main body 2 may be easily warped. Furthermore, as will be described later, this is because cutting for forming the handle portion 3 may be difficult. On the other hand, it is preferable that the thickness D of the base material 1 for doors is 24 mm or less. When the thickness D of the base material 1 for doors is 24 mm or more, the weight of the door increases. As a result, the load on the worker increases during processing and transportation of the door, and the use of materials increases, resulting in an increase in environmental load. This is because there is a risk of becoming.

  The base material 1 for doors is provided with the main-body part 2 and the concave handle part 3 which a finger | toe hooks at the time of door opening / closing formed in the main-body part 2. As shown in FIG. 3, the handle portion 3 is formed integrally with the main body portion 2 by cutting the left and right end portions M1 of the material base material M into a concave shape using a molder, a tenoner, or the like. .

  In this embodiment, the concave handle portion 3 is formed by cutting the end portion M1 of the material base material M so as to have a J-shape in a cross-sectional view, and the handle portion 3 includes the main body portion 2. Are formed by a front side edge 30 that is continuous with the front surface Fr, a rear side edge 31 that is continuous with the rear surface Ba of the main body 2, and a groove 32 between the front side edge 30 and the rear side edge 31. ing. The front side edge 30 is shorter than the rear side edge 31, and the main body 2 is opened and closed by inserting and hooking a finger into the groove 32 from the front side edge 30 side. In the illustrated example, the end of the front side edge 30 is formed in a circular shape in cross section, and the end of the rear surface side edge 31 is formed in a substantially square shape in cross section with rounded corners. However, both of them may be formed in a circular shape in a sectional view, or may be formed in a substantially square shape in a sectional view.

  The shape of the handle portion 3 is not limited to the example of FIG. 2 (J shape), and the lengths of the front side edge 30 and the rear side edge 31 are substantially the same as shown in FIG. That is, the concave handle portion 3 may be formed by cutting the end portion M1 of the material base material M so as to be U-shaped in a sectional view. Moreover, as shown in FIG. 5, the concave handle part 3 may be formed by cutting the end part M1 of the material base material M so as to have a U shape in a cross-sectional view. In the example of FIG. 5, the front surface on the end M1 side of the material base material M is cut into a concave shape, and the grip portion 3 includes a rear surface side edge 31 continuous with the rear surface Ba of the main body 2 and a rear surface side edge. A side-side edge portion 33 orthogonal to the portion 31 and the main body portion 2 are formed.

The grip portion 3 has a density of the bottom surface portion Bo extending along at least the rear surface Ba of the main body portion 2 in the surface thereof is 0.8 g / cm ³ or more. The bottom surface portion Bo along the rear surface Ba of the main body portion 2 on the surface of the handle portion 3 is a portion that easily enters the user's field of view when the door is viewed from the front surface (front surface) or the oblique front surface (front surface). 4 and FIG. 5, the inner surface of the rear surface side edge portion 31 corresponds to the bottom surface portion Bo. The bottom surface portion Bo does not necessarily extend in parallel with the rear surface Ba of the main body 2 as in the examples of FIGS. 2, 4, and 5. It may be inclined (regardless of plane or curved surface).

The handle portion 3 is formed by cutting the material base material M into a concave shape. However, the wood substrate constituting the material base material M, in particular, the wood fiberboard and the particle board, is derived from the manufacturing method. The density near the front and back surfaces increases, and the density decreases toward the center in the thickness direction. When a low-density part of the wood substrate is exposed by cutting, fluffing and crusting occur and the surface condition becomes uneven. . As a result, even if the decorative sheet 4 is pasted, unevenness and deformation are likely to occur on the surface of the decorative sheet 4. Since the bottom surface portion Bo is a portion that can be easily visually recognized by the user as described above, it is particularly noticeable when unevenness or deformation occurs on the surface of the decorative sheet 4 and greatly affects the visual impression. Therefore, in the present embodiment, the material base material M is cut so that the density of the bottom surface portion Bo is 0.8 g / cm ³ or more, and the surface of the bottom surface portion Bo is fluffed, fried, etc. By preventing the occurrence of the above, the surface smoothness of the bottom surface portion Bo is improved, and the above problem is solved.

Here, the density of the wooden substrate can be measured by the following method. First, a wood substrate to be measured is cut into a width of 10 mm and a length of 10 mm, and then sliced at a thickness of 0.1 mm using a microtome, so that a plurality of measurement sections are cut along the thickness direction of the wood substrate. Collect. Next, by measuring the weight of each of the plurality of measurement sections along the thickness direction from the front surface side to the back surface side of the wooden substrate and calculating the density (g / cm ³ ), the thickness along the wooden substrate thickness direction is calculated. Density distribution can be measured. Moreover, in order to measure the density of the bottom surface portion Bo of the base material 1 for doors, a measuring section having a thickness of 0.1 mm including the bottom surface portion Bo is collected from the base material 1 for doors and measured for weight. By doing so, the density (g / cm ³ ) can be calculated.

In order to make the density of the bottom surface portion Bo of the base material 1 for doors to be a high density of 0.8 g / cm ³ or more, in the present embodiment, two layers disposed on the front side and the rear side of the door base material 1. The density of the front and back surfaces of the wooden substrate B is 0.8 g / cm ³ or more, and by cutting into a concave shape so that a part of the surface of the wooden substrate B arranged on the rear side becomes the bottom surface portion Bo, A handle portion 3 is formed. As a result, when the grip portion 3 is formed by cutting, the position where the density is 0.8 g / cm ³ or more hits the boundary between the wooden substrate A and the wooden substrate B, and this boundary serves as a mark to reduce the density. Since the position which is 0.8 g / cm ³ or more can be easily discriminated, it is easy to perform cutting. The surface of the wood substrate B arranged on the rear surface side does not have to completely coincide with the bottom surface portion Bo. Even if the surface of the wood substrate B is slightly cut and the vicinity of the surface becomes the bottom surface portion Bo. Good.

Further, the front side of the wooden board B has the front surface of the main body 2, and the rear side of the wooden board B has the rear side of the rear side of the main body 2. Becomes a high density of 0.8 g / cm ³ or more. Therefore, even if some processing is applied to the front and rear surfaces of the door base material 1 to smooth the surface, it is possible to prevent the surface from being fuzzed or crumpled, so the front and rear surfaces of the door base material 1 can be prevented. The smoothness of can also be made favorable.

Further, by configuring the base material 1 for doors with three layers of wooden substrates B, A, B, the thickness of the wooden substrate A disposed therebetween is made thinner than when configuring with one layer of wooden substrates A. Can do. In wood fiber boards, particle boards, etc., as the thickness of the wood substrate A is thicker, the internal density is significantly lower than the density of the front and back surfaces. FIG. 6 shows the density distribution along the thickness direction of the medium density wood fiber board (MDF) having a thickness of 4 mm and 18 mm, respectively, measured by the method described above. Depending on the conditions (pressure, temperature, resin, etc.) at the time of production of the medium density wood fiber board (MDF), the medium density wood fiber board (MDF) produced under general production conditions is 4 mm thick. The density in the vicinity of the front and back surfaces is 0.8 g / cm ³ or more, and the density is not greatly reduced to about 0.7 g / cm ³ even in the vicinity of the center in the thickness direction. Although the density in the vicinity is 0.8 g / cm ³ or more, the density is greatly reduced toward the inside, and the density is greatly reduced to about 0.5 g / cm ³ near the center in the thickness direction. Therefore, by reducing the thickness of the wood substrate A disposed therebetween, the density can be increased over the entire surface of the handle portion 3, and as a result, the smoothness can also be improved.

  Moreover, the base material 1 for doors becomes a balanced structure (symmetric structure) in the cross-sectional structure of the thickness direction by comprising the base material 1 for doors by the three-layered wooden board | substrates B, A, and B. FIG. Therefore, the base material 1 for doors hardly warps and can be suitably used for a long (eg, about 2 m) long door such as a closet door.

In addition, in this embodiment which comprised the base material 1 for doors by the three-layered wood base materials B, A, and B, after the three-layer wood base materials B, A, and B were bonded together in advance, the handle portion 3 was formed. However, as shown in FIG. 7, the cutting process for forming the grip portion 3 is performed in a state in which the wooden base material B and the wooden base material A are bonded to each other as shown in FIG. After that, the rear side wooden substrate B may be bonded to the laminate of the wooden substrate B and the wooden substrate A. Also by this, since a part of the surface of the wooden substrate B arranged on the rear surface side becomes the bottom surface portion Bo, the density of the bottom surface portion Bo becomes 0.8 g / cm ³ or more, and the cutting process is facilitated. It can be carried out.

  Moreover, the base material 1 for doors does not necessarily need to be comprised with the wooden base material of 3 layers, and may be comprised with the wooden base material of 1 layer, 2 layers, or 4 layers or more.

For example, when the door base material 1 is composed of one layer of the wooden base material A, the density distribution in the thickness direction of the wooden base material A can be measured in advance by the method described above, and as shown in FIG. A mark m is applied to the position on the rear surface side of the wooden substrate A having a density of 0.8 g / cm ³ or more, and the mark m is formed in a concave shape with the mark m as a mark so that the position of the mark m is the bottom surface portion Bo. If the handle portion 3 is formed by cutting, the density of the bottom surface portion Bo can be set to 0.8 g / cm ³ or more.

When the door base material 1 is composed of two layers of the wooden base materials A and B, the thicker wooden base material A can be disposed on the rear surface side, or disposed on the front surface side. You can also. When the thicker wood substrate A is arranged on the front side, the positions where the density is 0.8 g / cm ³ or more of the wood substrate A and the wood substrate B are the same as in the example of FIG. Since it hits the boundary, the density of the bottom surface portion Bo can be set to 0.8 g / cm ³ or more by forming the grip portion 3 by cutting into a concave shape so that the boundary becomes the bottom surface portion Bo. Similarly, it is not necessary that the surface of the wooden substrate B completely coincides with the bottom surface portion Bo, and the surface of the wooden substrate B may be slightly cut so that the vicinity of the surface becomes the bottom surface portion Bo. On the other hand, when placing the thicker wooden substrate A on the rear side, the density distribution in the thickness direction of the wooden substrate A can be measured in advance by the method described above, as in the example of FIG. A mark m is applied to a position on the rear surface side of the wooden base material A having a density of 0.8 g / cm ³ or more, and the handle portion 3 is formed by cutting into a concave shape so that the position of the mark m becomes the bottom surface portion Bo. Thus, the density of the bottom surface portion Bo can be set to 0.8 g / cm ³ or more.

  The decorative sheet 4 is bonded to the surface of the door substrate 1 having the above structure (the front surface, the rear surface, the side surface, and the surface of the handle portion 3 of the main body 2), and edge tapes are formed on the upper and lower end surfaces of the door substrate 1. The door decorative material 10 is manufactured by pasting 5 together. The decorative sheet 4 is, for example, a paper-type decorative sheet, a resin-type decorative sheet (woody-type decorative sheet, mirror-type decorative sheet, etc.), a projecting plate, a melamine plate including a mirror surface, and the like are attached with a laminator using an adhesive or the like. Is pasted. The thickness of the decorative sheet 4 is, for example, 0.05 mm to 0.3 mm for a wood-like decorative sheet, 0.1 mm to 0.4 mm for a specular decorative sheet, and 0.2 mm to a melamine plate including a mirror surface. If it is 1.5 mm and a protrusion plate, it can be set as the range of about 0.2 mm-0.7 mm. Among them, a resin-based decorative sheet is preferable in consideration of processability and design properties. Also in the resin-based decorative sheet, the surface has a gloss value of 60 or more (based on JIS Z-8741-1997) in addition to the wooden decorative sheet having embossed, grained, and textured textures on the surface. A mirror-like decorative sheet having a smooth and high gloss is preferred from the viewpoint of design. Instead of the decorative sheet 4, the surface of the door base material 1 can be made by painting or the like.

According to the door base material 1 and the door decorative material 10 of the present embodiment, even if the concave handle portion 3 is formed by cutting using a molder or a tenoner on the material base material M made of a wooden substrate, Since the surface density of the bottom surface portion Bo of the handle portion 3 that easily enters the user's field of view is set to 0.8 g / cm ³ or more, the bottom surface portion Bo has fluffing and sacrificing due to cutting. This can be prevented, and the surface smoothness of the bottom surface portion Bo can be improved. As a result, even when the decorative sheet 4 is bonded, it is possible to prevent the surface of the decorative sheet 4 from being uneven or deformed, and to exhibit an excellent appearance. In particular, when a decorative sheet 4 having a mirror surface with a gloss value (conforming to JIS Z-8741-1997) of 60 or more is pasted, the surface of the sheet is very conspicuous, so the design is particularly improved. It is possible to make it.

  Although the Example and comparative example of the base material for doors and door decorative material which concern on this invention are shown below, it cannot be overemphasized that this invention is not limited to these Examples.

Example 1
The material substrate M is manufactured by integrating the MDF substrate B having a thickness of 4 mm, the MDF substrate A having a thickness of 12 mm, and the MDF substrate B having a thickness of 4 mm using a vinyl acetate adhesive. did. The end portion M1 of the material base material M was cut using a tenoner so that the cross-sectional shape became the shape of the alphabet “J” to form a concave handle portion. At the time of this cutting process, the cutting process is performed so that the bottom surface portion of the handle portion hits the position of 4 mm thickness from the back surface side of the material base material M, that is, the surface of the wooden substrate B on the back surface side becomes the bottom surface portion. gave. The density of the bottom surface portion of the grip portion was 1.0 g / cm ³ . A bottom surface portion of the handle portion was subjected to a polishing process using a bafrol manufactured by Nihon Kenshi Co., Ltd., to produce a door base material. By pasting a decorative sheet with a gloss value of 60 on this door base material by lapping using a PUR adhesive, cutting it to the required length and size, and attaching edge tapes to the top and bottom end faces A door decorative material was produced.

Example 2
The material substrate M was produced by integrating the MDF substrate B having a thickness of 4 mm and the MDF substrate A having a thickness of 15 mm by pressing using a vinyl acetate adhesive. The end portion M1 of the material base material M was cut using a tenoner so that the cross-sectional shape became the shape of the alphabet “J” to form a concave handle portion. At the time of this cutting process, the cutting process was performed so that the bottom surface portion of the handle portion hits the position of a thickness of 3.9 mm from the back surface side of the material base material M. The density of the bottom surface portion of the grip portion was 0.9 g / cm ³ . A bottom surface portion of the handle portion was subjected to a polishing process using a bafrol manufactured by Nihon Kenshi Co., Ltd., to produce a door base material. By pasting a decorative sheet with a gloss value of 60 on this door base material by lapping using a PUR adhesive, cutting it to the required length and size, and attaching edge tapes to the top and bottom end faces A door decorative material was produced.

Example 3
As the material base material M, an MDF base material A having a thickness of 18 mm is prepared, and the end M1 of the material base material M is cut using a tenoner so that the cross-sectional shape becomes the shape of the alphabet “J”. A concave handle was formed. At the time of this cutting, cutting was performed so that the bottom surface portion of the handle portion hits the position of 2 mm thickness from the back surface side of the material base material M. The density of the bottom surface portion of the grip portion was 0.8 g / cm ³ . A bottom surface portion of the handle portion was subjected to a polishing process using a bafrol manufactured by Nihon Kenshi Co., Ltd., to produce a door base material. By pasting a decorative sheet with a gloss value of 60 on this door base material by lapping using a PUR adhesive, cutting it to the required length and size, and attaching edge tapes to the top and bottom end faces A door decorative material was produced.

Example 4
The material base material M was produced by integrating the MDF base material B having a thickness of 4 mm and the MDF base material A having a thickness of 12 mm by pressing using a vinyl acetate adhesive. The end M1 of the material base material M was cut using a tenoner so that the cross-sectional shape became the shape of the alphabet “U”, thereby forming a concave handle. On the back side of the material base M, the MDF base B having a thickness of 4 mm was integrated by pressing using a vinyl acetate adhesive to produce a door base. The density of the bottom surface portion of the grip portion was 1.1 g / cm ³ . By pasting a decorative sheet with a gloss value of 60 on this door base material by lapping using a PUR adhesive, cutting it to the required length and size, and attaching edge tapes to the top and bottom end faces A door decorative material was produced.

Comparative Example 1
As the material base material M, an MDF base material A having a thickness of 18 mm is prepared, and the end M1 of the material base material M is cut using a tenoner so that the cross-sectional shape becomes the shape of the alphabet “J”. A concave handle was formed. At the time of this cutting, cutting was performed so that the bottom surface portion of the handle portion hits the position of 6 mm in thickness from the back surface side of the material base material M. The density of the bottom surface portion of the grip portion was 0.5 g / cm ³ . A bottom surface portion of the handle portion was subjected to a polishing process using a bafrol manufactured by Nihon Kenshi Co., Ltd., to produce a door base material. By pasting a decorative sheet with a gloss value of 60 on this door base material by lapping using a PUR adhesive, cutting it to the required length and size, and attaching edge tapes to the top and bottom end faces A door decorative material was produced.

Comparative Example 2
As the material base material M, an MDF base material A having a thickness of 18 mm is prepared, and the end M1 of the material base material M is cut using a tenoner so that the cross-sectional shape becomes the shape of the alphabet “J”. A concave handle was formed. At the time of this cutting, cutting was performed so that the bottom surface portion of the handle portion hits a position of 4.5 mm in thickness from the back surface side of the material base material M. The density of the bottom surface portion of the grip portion was 0.6 g / cm ³ . A bottom surface portion of the handle portion was subjected to a polishing process using a bafrol manufactured by Nihon Kenshi Co., Ltd., to produce a door base material. By pasting a decorative sheet with a gloss value of 60 on this door base material by lapping using a PUR adhesive, cutting it to the required length and size, and attaching edge tapes to the top and bottom end faces A door decorative material was produced.

Test Example 1 (Surface smoothness of handle portion (bottom surface portion) of base material for door)
The surface smoothness (presence of fuzz and crust) of the handle portion (bottom surface portion) of the door base material produced in Examples 1 to 4 and Comparative Examples 1 and 2 was confirmed visually, and the handle portion was white chalk. A white line was formed by drawing a line on the (bottom surface portion), and the evaluation was performed by visually confirming the colored state of the white line. The evaluation criteria were as follows.
(Double-circle): Fluff cannot be visually recognized visually, but is colored uniformly by white chalk confirmation.
○: Fluffing cannot be visually recognized, and there is partial color loss when white chalk is confirmed.
(Triangle | delta): Fluff cannot be visually recognized visually, but is colored with a mottled pattern by white chalk confirmation.
X: Fluff can be visually recognized.

Test Example 2 (Appearance of handle part (bottom part) of door decorative material)
The appearance (non-landscape level) of the handle portion (bottom surface portion) of the door decorative material produced in Examples 1 to 4 and Comparative Examples 1 and 2 was visually confirmed in front light and oblique light. The evaluation criteria were as follows.
A: Both front light and oblique light look smooth.
○ ⁺ : Smooth in front light but slightly shallow irregularities in oblique light.
○: Smooth in front light, but shallow unevenness in oblique light.
○ ⁻ : Shallow unevenness is seen in both front light and oblique light.
Δ: Slightly deep irregularities are seen in both front light and oblique light.
X: Deep unevenness is seen as a whole in both front light and oblique light.

Test example 3 (warp)
The deformation (warpage) over time of the door decorative material produced in Examples 1 to 4 and Comparative Examples 1 and 2 was measured. It left to stand in 25 degree | times atmosphere (30 days), and the curvature amount (arrow height amount) of the decorative material for doors was measured. The amount of warpage was measured with a gap gauge. When the amount of warpage in the longitudinal direction is 10 mm or less, ◯, 10 mm to 15 mm are Δ, and when it is larger than 15 mm, X. The obtained results are shown in Table 1.

Comparing the results of Examples 1 to 6 in Table 1 with the results of Comparative Examples 1 and 2, the smoother the surface after cutting, the higher the density of the bottom portion of the handle becomes 0.8 g / cm ³ or more. Therefore, it is confirmed that the appearance of the door decorative material is also excellent. In Example 2, since the cross-sectional structure in the thickness direction does not have a balanced structure (symmetrical structure), warpage is likely to occur, but the height of a cupboard or a washstand door, etc. A short door with a low height can be used without any problems. In Example 3, since the thickness of the rear side edge portion of the handle portion is as thin as 2 mm, it is preferable to reinforce against the impact using a backing material according to the application.

As described above, the door base material 1 and the door decorative material 10 according to the present invention have a density of the bottom surface portion Bo of the handle portion 3 of 0.8 g / cm ³ or more, so that the surface of the bottom surface portion Bo is fuzzy. It is possible to prevent the occurrence of sacres and the like, and to improve the surface smoothness of the bottom surface portion Bo. Therefore, even if the decorative sheet 4 is bonded to the surface, the surface of the decorative sheet 4 can be prevented from being uneven and deformed, so that an excellent appearance can be exhibited. This is a gloss value (JIS Z-8741- This is particularly effective when the decorative sheet 4 having a mirror surface of 60 or more (according to 1997) is bonded.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible unless it deviates from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Base material for doors 2 Main-body part 3 Handle part 4 Decorative sheet 30 Front side edge part 31 Rear side edge part 32 Concave groove Bo Bottom part

Claims (7)

In the base material for doors made of a single-layer or multiple-layer wood substrate, and formed with a concave handle portion on which a finger is hooked on the body portion when the door is opened and closed,
The base material for doors whose density of the bottom face part extended along the rear surface of the said main-body part at least is 0.8 g / cm < ³ > among the surfaces of the said handle part. Consists of multiple layers of wood substrate
The density of both surfaces of the wooden substrate on the rear surface side, where one surface forms the rear surface of the main body, is 0.8 g / cm ³ or more,
The base material for doors of Claim 1 in which the said handle part is formed so that a part of other surface of the wooden substrate of the said back surface side may become the said bottom face part. It consists of three or more layers of wood substrate,
The base material for doors of Claim 2 whose density of both surfaces of the wooden substrate of the front side whose one surface makes the front surface of the said main-body part is 0.8 g / cm < ³ > or more.   The grip portion includes a front side edge that is continuous with the front surface of the main body, a rear side edge that is continuous with the rear surface of the main body, and a groove between the front side edge and the rear side edge. The base material for doors in any one of Claims 1-3 formed by these.   The door base material according to any one of claims 1 to 4, wherein the wood substrate is a medium density wood fiber board (MDF), a high density wood fiber board (HDF), or a particle board (PB).   A door decorative material comprising a decorative sheet attached to the surface of the door base material according to any one of claims 1 to 5.   The door decorative material according to claim 6, wherein the gloss value of the decorative sheet measured according to JIS Z-8741-1997 is 60 or more.