JP2014190088A - Humidity conditioning building material and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a humidity conditioning building material excellent not only in humidity conditioning performance but also in strength, and a method of efficiently manufacturing the same.SOLUTION: In a humidity conditioning building material 10 of the present invention, a surface decorative layer 3 is provided on at least one of top and under surfaces 2a and 2b of a base material 2 made of an end grain panel 20 in such a manner that a coated part 11 coated with the surface decorative layer and an exposed part 12 with exposed butt end surfaces 21a and 21b of a component 21 of the end grain panel 20 are formed.

Description

  The present invention relates to a humidity control building material and a method for producing the same.

Many existing humidity control building materials are mainly constructed as walls and ceilings. However, in a normal living space, it is often difficult to secure a necessary moisture absorption / release area because furniture and storage are batting with the wall surface.
Therefore, it is conceivable to use humidity control building materials not only for walls and ceilings but also for storage and furniture. However, in order to exhibit high moisture absorption / release performance, it is necessary to use a porous substrate, and inevitably there is only a low density material, that is, a material with low strength. Therefore, it is difficult to use a conventional humidity-conditioning building material as an alternative to a heavy shelf or a door plate that is expected to be impacted. Moreover, when using a humidity control building material for storage, it is unavoidable to be an additional construction, and tends to be pressured both in terms of space and cost.

In addition, since many humidity-controlling building materials are porous, dirt due to water absorption such as fruit juice, sauce, and the like, and cracks due to water absorption swelling are likely to occur. Therefore, a technique for overcoming the problem of water absorption by applying a water-repellent treatment or a moisture-permeable surface decorative material has been developed.
Patent Documents 1 and 2 describe humidity control building materials obtained by bonding a moisture-permeable surface material to the surface of a substrate having humidity control performance. In these humidity control building materials, the adhesion of the surface material is described. In order to impart moisture permeability to the adhesive layer, silica gel is added or moisture permeable holes are formed. However, these moisture-conditioning building materials have problems such as an increase in manufacturing cost and the like because the material for the surface material is selected and the adhesive also requires a special formulation.

  Patent Documents 3 and 4 describe that the humidity control building material exhibits both humidity control and water repellency by treating the surface with a silicone-based or silane-based water-repellent material. However, a face material that increases strength cannot be bonded to the surface or intermediate layer of the humidity control building material, and the application is limited.

  Further, in Patent Document 5, a plurality of grooves extending in a direction orthogonal to the fiber orientation direction of the single plate are formed on a single plate forming one surface of the plywood, and the single surface including the inside of the grooves is formed on the single surface. A plate material that has been improved in moisture absorption and release properties by adding a humidity control agent such as urea water is described. However, this plate material requires a humidity control agent such as urea water, which complicates the manufacturing process. On the other hand, if a humidity control agent is not used, the humidity control performance is inferior.

JP 2005-48439 A JP 2009-228339 A JP 2005-163474 A JP 2002-13216 A JP 2012-57456 A

  Accordingly, an object of the present invention is to provide a humidity control building material and a method for producing the same that can solve the problems of the above-described conventional technology.

In the present invention, at least one of the upper and lower surfaces of a substrate made of an end grain panel is exposed such that a surface decorative layer is covered with the surface decorative layer, and the end face of the constituent material of the end grain panel is exposed. The present invention provides a humidity control building material characterized in that it is provided so as to form a part.
The present invention also relates to a method of manufacturing a humidity control building material as described above, wherein a surface decorative layer is formed on an end grain panel in a wider area than the covering portion, and then a part of the surface decorative layer is removed by cutting. Then, the manufacturing method of the humidity-control building material characterized by forming the said exposed part is provided.

The humidity control building material of the present invention has excellent humidity control performance and excellent strength.
According to the humidity control building material of the present invention, a humidity control building material excellent in design can be efficiently manufactured at low cost.

FIG. 1 is a perspective view showing an embodiment of the humidity control building material of the present invention. 2 is an enlarged sectional view taken along line II-II in FIG. FIG. 3 is a perspective view showing an example of an end grain panel constituting the base material of the humidity control building material. FIG. 4 is a plan view showing another embodiment of the humidity control building material of the present invention. FIG. 5: is a graph which shows the change of moisture absorption when the cyclic | annular steady moisture absorption / release test in a mid-humidity region is repeated 4 cycles about the test body of the building material using the end grain panel of thickness 12.5mm. FIG. 6 is a graph showing a change in moisture absorption when a cyclic steady-state moisture absorption / release test in a medium humidity region is repeated 4 times for a building material test piece using an end grain panel having a thickness of 25.0 mm. FIG. 7 is a graph showing the relationship between the manifestation rate and the moisture absorption amount created from the data of the moisture absorption process in the first cycle of the graph shown in FIG. FIG. 8 is a graph showing the relationship between the manifestation rate and the moisture absorption amount created from the data of the moisture absorption process in the first cycle of the graph shown in FIG.

Hereinafter, the present invention will be described in detail based on preferred embodiments thereof.
As shown in FIGS. 1 and 2, the humidity control building material 1 according to an embodiment of the present invention has the surface decorative layer 3 on both the upper and lower surfaces 2 a and 2 b of the base grain 2 made of the end grain panel 20. The covering part 11 covered with the surface decorative layer 3 and the exposed part 12 where the wood end surface 21a of the constituent material 21 of the end grain panel 20 is exposed are provided.

More specifically, as shown in FIG. 1, the humidity-control building material 1 of the present embodiment has a horizontally long cross-sectional shape and a long shape in one direction X.
Further, as shown in FIG. 2, the surface decorative layer 3 is provided on both the upper and lower surfaces 2 a and 2 b of the base material 2 made of the end grain panel 20. More specifically, as shown in FIG. 1, a plurality of covering portions 11 and a plurality of exposed portions 12 are provided on one surface 2 a of the base material 2 including the end grain panel 20, respectively. The covering portions 11 and the exposed portions 12 are alternately formed in the width direction Y of the humidity control building material 1. In addition, a plurality of covering portions 11 and a plurality of exposed portions 12 are also formed on the other surface 2 b of the base material 2 made of the end grain panel 20 so as to extend in the longitudinal direction X of the humidity control building material 1. The covering portions 11 and the exposed portions 12 are also alternately formed in the width direction Y of the humidity control building material 1.

  As shown in FIG. 3, the end grain panel 20 is made up of block-shaped pieces obtained from a saw plate, a small square member, or the like as a component 21, and the component 21 is made up of the both end surfaces 21 a and 21 b of the panel. The upper and lower surfaces 2a and 2b are assembled and bonded so as to form. The end surfaces 21a and 21b are surfaces obtained by cutting wood at right angles to the fiber direction of the tree (the axial direction of the trunk or branch).

  In the end grain panel 20, the pair of surfaces having the largest area among the six surfaces is the upper and lower surfaces 2 a and 2 b, and the surface decorative layer 3 described above is provided on each of the upper and lower surfaces 2 a and 2 b. Since the upper and lower surfaces 2a and 2b of the end grain panel 20 are made of the end surfaces 21a and 21b of the constituent material 21, the end grain panel 20 is used as the base material 2 of the humidity control building material 1 and one of the upper and lower surfaces 2a and 2b thereof. Or even if it uses only so that a part of both may be exposed, the humidity control building material 1 which has the outstanding humidity control performance can be obtained.

  That is, in the covering portion 11 formed on one or both of the upper and lower surfaces 2a and 2b of the base material 2 made of the end grain panel 20, the end face 21a or 21b of the constituent material 21 of the end grain panel 20 is a surface decorative layer. 3, the surface strength is improved, but on the other hand, moisture absorption / release through the end surface 21a is hindered or reduced. However, in the exposed part 12, the end face 21 a or 21 b of the component 21 of the end grain panel 20 is not covered with the surface decorative layer 3, and therefore the end grain is passed through the end face 21 a or 21 b. Moisture absorption into the panel 20 and moisture release from the panel 20 are favorably performed. Thereby, the humidity control building material 1 of the present embodiment has excellent humidity control performance and excellent strength.

  The constituent material 21 of the end grain panel 20 may be obtained from any tree species, for example, balsa, falkata, thorn, cypress, cedar, zelkova, oak, tamo, cherry, walnut and the like. However, from the viewpoint of obtaining a lightweight moisture-conditioning building material with high workability and moisture conditioning performance for the end-grain panel, the tree species of the component 21 of the end-grain panel is balsa, falkata or drill (paulownia) Is preferred. From the same viewpoint, the constituent material 21 of the end grain panel 20 preferably has a specific gravity of 0.35 or less, and more preferably 0.10 or more and 0.35 or less.

The surface decorative layer 3 can reinforce strength such as bending strength and surface strength of the end grain panel 20, and there is no particular limitation on the material, thickness, and the like.
However, the surface decorative layer 3 is formed of a plate-like member capable of improving the bending strength, so that the bending strength of the end grain panel having a relatively low strength is improved, and the humidity control building material having an excellent bending strength and the like. From the viewpoint of obtaining

The plate-like member 30 has a plate-like form and can reinforce the strength of the end-grain panel by bonding to the surface of the base material 2 made of the end-grain panel with various known adhesives. .
Examples of the plate-like member include a single plate laminated material such as plywood and LVL, a wood material such as MDF and particle board, a resin plate made of various synthetic resins such as wood, polyolefin and polyester, aluminum, stainless steel, copper and the like. Examples thereof include a metal plate made of metal, a plate made of marble or ceramic, and a laminate of two or more of these. The plate-like member may be one in which a synthetic resin layer is provided in the middle or on the surface of a wooden material or wood. The plate-like member is made of a wood material or wood as a base material, and the surface of the base material of the humidity control building material 1 is made up of a veneer, a decorative sheet made of synthetic resin, paper or the like, a coating layer, or the like. It is preferable.
The thickness of the plate-like member 30 is preferably 0.5 mm or more, more preferably 1.0 mm or more, and further preferably 0.5 to 5.0 mm, from the viewpoint of improving the bending strength of the humidity control building material. Especially preferably, it is 1.0-3.0 mm.

As the paint used for forming the coating layer provided on the surface of the plate-like member 30, for example, a melamine resin paint, a phenol resin paint, an acrylic urethane resin paint, an epoxy resin paint, or the like is used. Can do.
The humidity control building material of the present invention may be one in which a coating layer is formed directly on the surface of the end grain panel 20 with such a paint. In the end grain panel, the end face of the constituent material forms a pair of wide surfaces, and the surface is often soft and easily damaged. By providing the coating layer in a predetermined manner in which the covering portion and the exposed portion are generated, the surface is hardly damaged even when used as a shelf board on which an object is placed.
The thickness of the coating layer provided on the surface of the substrate of the plate member 30 or the surface of the end grain panel 20 is preferably 0.05 mm or more, more preferably 0.1 mm or more, and still more preferably 0.1 to 0.1 mm. 2.0 mm, particularly preferably 0.2 to 2.0 mm.
In addition, since the plate-like member and the coating layer in which the exposed portion is formed have a design property in itself, the plate-like member and the coating layer used as the surface decorative material have a decorative sheet or the like attached to the surface. It is not limited to what you have.

  As shown in FIG. 1, the humidity control building material 1 of the present embodiment has a long shape in one direction X, and the covering portion 11 extends over the entire length of the humidity control building material 1 in the longitudinal direction X. Therefore, the humidity control building material 1 is further superior in bending rigidity and the like. The covering portion 11 extending over the entire length in the longitudinal direction X may be formed on only one of the upper and lower surfaces 2a and 2b of the substrate 2 made of the end grain panel 20, or may be formed on both the upper and lower surfaces 2a and 2b. May be.

Moreover, it is preferable that the surface decoration layer 3 has water resistance. The water resistance of the surface decorative layer 3 is such that even if 0.1 ml of tap water is placed on a horizontal surface and left for about 15 minutes, the water does not soak into the surface decorative layer 3 and is simply wiped. It is preferable to have water resistance to the extent that can be removed without leaving a trace.
In order to give the surface decorative layer 3 water resistance, for example, as the surface decorative layer 3, a plate-shaped member made of a water-resistant synthetic resin such as polyolefin or polyester or a coat layer made of such a water-resistant synthetic resin is used. A plate-like member on the surface is used, or a coat layer using a water-resistant paint is formed as the surface decorative layer 3. If the surface decorative layer 3 is water resistant, it is possible to prevent surface contamination due to the liquid soaking into the surface of the humidity control building material and cracking due to water absorption swelling.

According to the humidity control building material 1 of the present embodiment, the end grain panel 20 excellent in moisture absorption / release performance is used as the base material 2, and the surface decorative layer 3 is provided on both the upper and lower surfaces 2 a and 2 b of the base material 2. Since the covering portion 11 and the exposed portion 12 are formed, the exposed portion 12 ensures sufficient humidity control performance and the covering portion 11 ensures strength such as bending strength and wear resistance. can do.
Such an effect is also exhibited when the surface decorative layer 3 is provided on only one surface of the substrate 2 so that the covering portion 11 and the exposed portion 12 are formed.

In addition, when the surface decorative layer 3 is non-or low moisture-permeable, moisture absorption / release of the end grain panel 20 through the end surfaces 21a and 21b of the constituent material 21 of the end grain panel 20 is inhibited in the covering portion 11 ( Including a decrease in moisture absorption / release performance). Therefore, the balance between humidity control performance and strength to be applied to the humidity control building material 1 by forming the covering portion 11 in which moisture absorption / release is inhibited and the exposed portion 12 in which moisture absorption / release is not inhibited at an appropriate area ratio. Can be adjusted appropriately.
When the surface decorative layer 3 is impermeable to moisture, the surface decorative layer 3 has an exposed area ratio of 10 to 90% on at least one of the upper and lower surfaces 2a and 2b of the end grain panel 20. It is preferable to be provided so that the area ratio of the exposed portion is 20 to 60%.

In addition, as described above, the surface decorative layer in the humidity control building material of the present invention can employ various materials and thicknesses that can be reinforced such as bending strength and surface strength of the end grain panel. Even when a plate-like member is used as the layer, the adhesive layer does not need to have moisture permeability, and therefore, it is not necessary to use a special adhesive such as a humidity adjusting material as the adhesive.
Therefore, an appropriate surface decorative layer or an adhesive can be used according to the specific use of the humidity control building material, and the humidity control building material can be manufactured at a low cost while suppressing the manufacturing cost. Also, in terms of dimensions, it can be a humidity control building material having the same shape and dimensions as the conventional preferred shape and dimensions assuming specific uses such as shelf boards and furniture components, and therefore, conventional building materials. The production line can be utilized at a lower cost and more efficiently.

Moreover, in the humidity control building material 1 of this embodiment, the design area is improved because the exposed area of the end face of the constituent material 21 of the end grain panel 20 is smaller than that of the end grain panel 20 itself. Since the exposed portion 12 is formed in a stripe shape as shown in FIG. 1, the design is further improved.
The individual sizes, shapes, area ratios, and the like of the covering portion 11 and the exposed portion 12 in the present invention are not limited to those shown in FIG. 1 and can be appropriately changed in consideration of design properties. For example, FIG. 4 is a diagram illustrating an example of another formation mode of the covering portion 11 and the exposed portion 12. In the embodiment shown in FIG. 1, the exposed portion 12 is formed in a strip shape. However, in the embodiment shown in FIG. 4A, the exposed portion 12 is formed in a lattice shape, and FIG. In each embodiment shown in FIG. 4D, the exposed portion 12 is formed in a dotted pattern.
According to the present invention, like the humidity-control building material 1 of the above-described embodiment and the humidity-control building material of each embodiment shown in FIG. 4, the design properties are devised by devising the formation mode of the covering portion 11 and the exposed portion 12. Can provide a variety of humidity control building materials.

  In the humidity control building material of the present invention, as in the humidity control building material 1 shown in FIG. 1 and FIG. 2 described above, the surface decorative layer 3 is formed on the upper and lower surfaces 2a and 2b of the base material 2, respectively. 12 is preferable from the viewpoint of obtaining a high humidity adjustment effect by securing a wide area capable of exhibiting humidity adjustment performance in a narrow space.

Moreover, when forming the surface decorative layer 3 on each of the upper and lower surfaces of the base material, as shown in FIGS. 1 and 2, the position of the exposed portion 12 may overlap on one side and the other side, The position of the exposed portion 12 is different between the one surface side and the other surface side, so that the hygroscopic performance of the wide part of the end grain panel can be effectively utilized, and the area ratio of the exposed portion 12 is kept low, and the high moisture absorbing performance. From the viewpoint of obtaining
In the form in which the position of the exposed portion 12 is different between the one surface side and the other surface side of the upper and lower surfaces of the base material, the exposed portion 12 on the one surface side and the exposed portion 12 on the other surface side do not have a portion that overlaps at all, The form which has the part which the exposed part 12 of the one surface side and the exposed part 12 of the other surface side overlap, and the part which does not overlap is included. In the latter case, the area of the portion where the exposed portion 12 on the one surface side and the exposed portion 12 on the other surface side preferably overlap with the respective areas of the exposed portion 12 on the one surface side and the exposed portion 12 on the other surface side. It is 50% or less, more preferably less than 30%, still more preferably less than 10%. In addition, the position of the exposed portion 12 overlaps on the one surface side and the other surface side of the upper and lower surfaces of the base material when one exposed portion projects in parallel with the thickness direction of the base material or humidity control building material. It means to overlap the exposed part.

  Moreover, in the humidity-control building material of the present invention, for example, as shown in FIG. Like the exposed portion 12 on the upper surface 2a side of the base material shown in FIG. 2, the exposed portion 12 is such that the position of the front end surface 21a of the constituent material 21 of the end grain panel 20 is the surface 2a of the end grain panel 20 in the covering portion 11. The position of the end surface 21a of the component 21 of the end grain panel 20 is the end of the covering portion 11 as in the exposed portion 12 on the lower surface 2b side of the base material shown in FIG. You may be dented in the internal direction of the base material 2 rather than the position of the surface 2b of the grain panel 20. FIG.

  However, if the exposed portion 12 is greatly recessed toward the inside of the base material 2, the volume of the end grain panel existing in the portion overlapping the exposed portion 12 is reduced, and the moisture absorption / release amount through the exposed portion 12 is reduced. Tends to decrease. In particular, when the thickness of the end grain panel is thin, the tendency becomes remarkable. Therefore, the dent amount t12 of the end surfaces 21a and 21b of the exposed portion 12 from the surfaces 2a and 2b of the end grain panel 20 is preferably 10% or less of the total thickness t of the end grain panel 20, and more preferably. 5% or less, more preferably 1% or less. In the case where dents are formed on both sides of the end grain panel, the amount of dent t12 from the surfaces 2a and 2b of the end grain panel 20 is 10% or less of the total thickness t of each range end grain panel 20 in total. Preferably, it is 5% or less, more preferably 1% or less.

Further, from the viewpoint of obtaining high humidity control performance, the total thickness t of the end grain panel 20 is preferably 10 mm or more, and more preferably 25 mm or more. The upper limit of the total thickness t of the end grain panel 20 is not particularly limited, but is preferably 50 mm or less from the viewpoint of obtaining a lightweight moisture-conditioning building material.
In the exposed portion 12 of the humidity control building material 1 shown in FIG. 2, the cut or cut surface of the wood constituting the constituent material 21 of the end grain panel covers a member or coating layer that reduces the moisture absorption / release performance. It is exposed without being.

In the humidity-control building material of the present invention, for example, a surface decorative layer is formed on a single surface or both surfaces of an end grain panel over a wider area, preferably the entire surface, and then part of the surface decorative layer is removed by cutting. Thus, it can be easily manufactured by forming the exposed portion. According to this method, for example, after forming a plate-like member or a coating layer, an exposed portion can be formed by cutting with a known cutting device such as an NC router, and an exposed portion having a desired shape can be formed. It can be formed with high accuracy. Therefore, a humidity control building material excellent in design can be efficiently manufactured at low cost.
Moreover, the humidity-control building material of the present invention can be formed in advance by processing it into a strip shape or joining a plate-like member having an opening to an end grain panel. Also by this method, a humidity control building material excellent in design can be produced efficiently.

  The humidity control building material of the present invention can be used for various purposes such as interior materials of buildings such as store cabinets of shops, and components such as furniture and musical instruments, and performs humidity control of the space where each is arranged. Can do. Examples of the interior material of the building include a shelf board arranged in a room of a store or a house, a louver arranged on the ceiling, a lattice door, a stair railing column, and a partition. Constituent members such as furniture and musical instruments include storage doors, shelf boards, side boards, and top boards of pianos and organs. The humidity control building material may be used with the upper and lower surfaces of the substrate made of end grain panels parallel to the horizontal direction, or may be used parallel to the vertical direction.

As mentioned above, although this invention was shown and demonstrated the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, A various deformation | transformation is possible.
For example, as shown in FIG. 2, the groove formed in the exposed portion 12 is an inverted trapezoidal shape in which the side surface and the bottom surface of the groove are replaced by a substantially right angle, and the distance between the pair of side surfaces increases as the distance from the bottom surface approaches. It may be a trapezoidal shape that decreases as the distance between the pair of side surfaces approaches the bottom surface. In the case of a groove having an inverted trapezoidal shape or a trapezoidal cross section, the area of the exposed part for calculating the area ratio of the exposed part is the area in plan view of the bottom surface of the groove.

  Moreover, although the humidity control building material 1 of embodiment mentioned above was provided so that the surface decoration layer 3 might be formed in each of the upper and lower surfaces of the base material 2 so that the coating | coated part 11 and the exposed part 12 might be formed, The surface decorative layer 3 may be provided on only one of the two surfaces so that the covering portion 11 and the exposed portion 12 are formed. In that case, the surface decoration layer 3 may be formed so that the whole surface may become the coating | coated part 11, and the whole surface may become the exposed part 12 on the other surface of the base material 2. FIG. Moreover, when providing the surface decoration layer 3 so that the coating | coated part 11 and the exposed part 12 may be formed, the exposed part 12 may be formed biased to the one end side of the width direction of the humidity-control building material 1. And it may be formed only in the center part of the width direction of humidity-control building material 1, or only in both ends. Further, the surfaces other than the upper and lower surfaces of the base material 2 made of the end grain panel 20 may be coated with the same or different type of cosmetic material 4 as the surface decorative layer 3, or the surface of the end grain panel is exposed. May be.

  EXAMPLES Next, although this invention is demonstrated more concretely based on an Example, this invention is not limited at all by the following Examples.

1. Manufacture of test body A plywood (hereinafter referred to as “poly plywood”) having a resin coating layer made of a polyester resin on one side of an end grain panel made of a balsa material having a specific gravity of 0.35 or less is used as an ordinary vinyl acetate. A block board was manufactured by bonding using a resin emulsion adhesive. The end grain panel used was one having a thickness of 12.5 mm and one having a thickness of 25.0 mm, and two types of block boards having different thicknesses were produced.
A plurality of exposed portions were formed by forming slits (grooves) having a width of 10 mm using a panel saw on a surface made of polyplywood in each of the two types of block boards. The depth of the slit (groove) was matched with the thickness of the polyplywood. And in order to evaluate moisture absorption / release performance, about 5 surfaces other than the 1 side provided with the slit were covered with an aluminum tape or an aluminum sheet having no moisture permeability, to obtain a specimen of a building material used for the moisture absorption / release test. . A plurality of types of test specimens having different exposed area ratios were manufactured by varying the number of exposed parts to be formed. The area ratio (hereinafter also referred to as “appearance ratio”) of the exposed portion is a ratio (percentage) of the area of the exposed portion formed on the surface of the upper surface or the lower surface of the end grain panel.

2. Humidity control performance evaluation The test specimens obtained were subject to the humidity control building material criteria (revised on April 1, 2012) for the “Humidity Control Building Material Registration and Labeling System” established by the Japan Building Materials and Housing Equipment Industries Association. According to the method and the judgment criteria, it was evaluated whether or not the moisture absorption and desorption amount criteria for being certified as a humidity control building material was satisfied.
The moisture absorption and desorption amount standard defined in the above humidity conditioning building material judgment standard is the amount of moisture absorption and dehumidification in the intermediate humidity range (relative humidity range 50% -75%) in accordance with JIS A1470-1. In Table 1. In addition, the measurement of the moisture absorption amount and moisture release amount in the middle humidity range (relative humidity range 50% -75%) is 12 hours for the moisture absorption process at 23 ° C. and 75% RH, and 12 hours for the moisture release process at 23 ° C. and 50% RH. A total of 24 hours was defined as one cycle, and this was repeated 4 cycles, and the change in moisture absorption was measured.

The result of the test body using the end grain panel having a thickness of 12.5 mm is shown in the graph of FIG. 5, and the result of the test body using the end grain panel having a thickness of 25.0 mm is shown in the graph of FIG. .
When the result shown in FIG. 5 is seen, it turns out that the test body whose thickness of an end grain panel is 12.5 mm satisfy | fills the reference | standard shown in Table 1 by making an expression rate into 40% or 56%. Moreover, when the result shown in FIG. 6 is seen, it turns out that the test body whose thickness of an end grain panel is 25 mm satisfy | fills the reference | standard shown in Table 1 by making an expression rate into 40%.

Moreover, although the result about the test body which does not satisfy | fill the criteria shown in Table 1 is shown collectively in FIG.5 and FIG.6, as shown in FIG.7 and FIG.8, moisture absorption process 3,6 and 12 hours Regarding the subsequent moisture absorption amount, including those test specimens, when the graph with the horizontal axis representing the rate and the vertical axis representing the moisture absorption amount is created, the manifestation rate required to satisfy the moisture absorption amount shown in Table 1 at each time point. I understand.
Accordingly, the moisture absorption amount after the moisture absorption processes 3, 6 and 12 hours is required to obtain a moisture-conditioning building material that satisfies the criteria shown in Table 1 by obtaining the manifestation rate that will satisfy the conditions shown in Table 1. It is also possible to obtain the expression rate.
However, the result shown in FIG.5 and FIG.6 is a result about the test body which formed the exposed part only in one side, and when an exposed part is formed in both surfaces, with a smaller manifestation rate, as a humidity-control building material You may be able to get a registration.
Thus, according to the humidity control building material of the present invention, high humidity control performance that can be certified as a humidity control building material in the humidity control building material registration and display system by appropriately adjusting the thickness and appearance rate of the end grain panel It is also possible to provide a humidity control building material having

DESCRIPTION OF SYMBOLS 1 Humidity control building material 2 Base material 2a, 2b Upper and lower surfaces of base material 20 End grain panel 21 Component material 21a, 21b Top edge surface of component material 3 Surface decorative layer 11 Covering part 12 Exposed part 30 Plate-shaped member

Claims (9)

  On at least one of the upper and lower surfaces of the substrate composed of the end grain panel, a covering portion in which the surface decorative layer is covered with the surface decorative layer and an exposed portion in which the end face of the constituent material of the end grain panel is exposed are generated. Humidity control building material characterized by being provided as follows.   The humidity control building material according to claim 1, wherein the specific gravity of the constituent material of the end grain panel is 0.35 or less.   The humidity control building material according to claim 1 or 2, wherein the surface decorative layer is formed of a plate-like member capable of improving bending strength.   The humidity control building material according to claim 3, wherein the humidity control building material has a shape that is long in one direction and includes a covering portion that extends over the entire length of the humidity control building material in the longitudinal direction. Building materials.   The humidity control building material according to any one of claims 1 to 4, wherein the surface decorative layer has water resistance.   The humidity control building material according to any one of claims 1 to 5, wherein the exposed portion is formed in a strip shape, a lattice shape, or a pattern shape.   The said surface decoration layer is provided so that the said coating | coated part and the said exposed part may arise in each of the upper and lower surfaces of the said base material, The adjustment of any one of Claims 1-6 characterized by the above-mentioned. Wet building material.   The humidity control building material according to claim 7, wherein a position of the exposed portion is different between the one surface side and the other surface side of the base material. It is a manufacturing method of a humidity-control building material given in any 1 paragraph of Claims 1-8,
A humidity control building material, wherein a surface decorative layer is formed on an end grain panel in a wider range than the covering portion, and then the exposed portion is formed by removing a part of the surface decorative layer by cutting. Production method.

Images