JP2005186503A - Woody formed article using thin woody piece, hollow woody panel, and its production method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woody formed article which is high in rigidity, easy of material securing, and low in production costs, a hollow woody panel using the woody formed article, and methods for producing them. <P>SOLUTION: As thin woody pieces, pieces having an average thickness of 0.1-0.6 mm and an average length which is larger than the thickness of the unevenness of the woody formed article 11 obtained from the thin woody pieces are used. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wooden molded article, a wooden hollow panel, and a method for manufacturing the same, which are highly rigid, easy to secure materials, and low in manufacturing cost.

In recent years, in apartment houses such as apartments, the use of double floors for the purpose of sound insulation and sound insulation is increasing. As a wooden hollow panel used for a double floor, a high-rigidity, lightweight and capable of shortening the construction time is required. In addition, wooden hollow panels used for furniture, beds, and the like are also required to have high rigidity, light weight, and good manufacturability.
As one of the techniques for manufacturing such a wood hollow panel, a veneer veneer is bonded and laminated, and bent in a direction orthogonal to the fiber to form a wavy wood molded product, and plywood or the like is formed on both sides of the wood molded product. There is a method of obtaining a woody hollow panel by bonding together (see Patent Document 1).
However, in this method, the laminated veneer veneers that are bonded and laminated do not stick together and are difficult to bend, and when bent and pressed forcibly, each part of the veneer is cut, resulting in a wood molded product and a wood hollow There is a problem that the strength of the panel decreases. Therefore, in this method, in order to appropriately fold the veneer veneer laminated by adhesion, there is a restriction that the thickness of the veneer veneer is not more than a certain value and the degree of bending is not more than a certain value.
Moreover, in order to obtain a veneer veneer in this method, there are a method of flat cutting with a knife from a flitch and a method of peeling a veneer from a large diameter wood by a rotary race, but the former method obtains a veneer veneer with a large area. There is a problem that it is difficult and the manufacturing cost is high. On the other hand, in the latter method, although a veneer veneer with a large area can be obtained, it is difficult to obtain a thin veneer veneer, and since a veneer is peeled off from a large diameter tree, a small diameter tree such as thinned wood is used. This is not preferable from the viewpoint of environmental load.

In order to solve the problems of the above method, a technique for manufacturing a wooden hollow panel using a wooden flake (hereinafter referred to as “strand” as appropriate) is known (for example, see Patent Document 2).
In the technique of Patent Document 2, a wood flake to which an adhesive resin (adhesive resin) is attached is laminated together with a plurality of cores, and this laminate is integrally formed by hot pressing, and then the core is pulled out to have a rib. A hollow wood panel that forms pores can be obtained.
According to this method, a highly rigid and lightweight wood hollow panel can be obtained, and in addition, the use of wood flakes is preferable in terms of effective use of resources or environmental load, but the step of pulling out the core Therefore, the manufacturing cost of the wooden hollow panel is increased correspondingly, and the problem remains that mass production is difficult.
JP 61-163842 A JP 2002-120209 A

  Accordingly, an object of the present invention is to provide a wood molded product having high rigidity, easy material securing, and low manufacturing cost, a wood hollow panel using the wood molded product, and a production method thereof. Let it be an issue.

  As a result of intensive research in this situation, the present inventor, as a wood flake, has a thickness average value in the range of 0.1 mm to 0.6 mm and a length average value obtained from the wood flake It has been found that the above problems can be solved by using a molded product having a depth greater than the depth of the irregularities.

  That is, the first invention of the present invention is a concavo-convex wood-molded article obtained by bonding and laminating a wood flake having a thickness average value of 0.1 mm or more and 0.6 mm or less with a resin, The wood molded product is characterized in that the average length of the wood flakes is larger than the depth of the unevenness of the wood molded product.

  A second invention of the present invention is the woody molded product according to the first invention, wherein the maximum depth of the unevenness is 10 mm or more and 50 mm or less.

  A third invention of the present invention is the woody molded product according to the first invention or the second invention, wherein the length of the repeated pitch of the cross section of the same shape is 30 mm or more and 150 mm or less.

  According to a fourth aspect of the present invention, there is provided a wooden hollow panel characterized in that a wooden board is bonded to one side or both sides of the wooden molded article according to any one of the first to third aspects. .

  According to a fifth aspect of the present invention, there is provided the wood molded article according to any one of the first to third aspects, wherein the wood flakes are bonded and laminated with a resin by hot pressing. It is a manufacturing method of the woody hollow panel as described in 4th invention.

Since the wood molded product and the wood hollow panel of the present invention are made of wood flakes, 1) it is easy to secure the material, and 2) there is no area restriction, it is possible to produce a molded product with a large area. 3) A product having a uniform appearance without cracks or holes can be obtained. In addition, by appropriately selecting the thickness and length of the wood flakes, even if the depth of unevenness of the target wood molding or the length of repeated pitches of the same shape of the cross section is changed, the rigidity is increased accordingly. Can be secured.
Furthermore, the wooden molded product and the wooden hollow panel of the present invention can be easily and inexpensively manufactured. Therefore, the wood molded article and the wood hollow panel can be suitably used for a double flooring material, furniture / bed, and the like, and are useful.

Hereinafter, the present invention will be described in detail with reference to the drawings.
An example of a woody molded product according to the present invention is shown in FIG. FIG. 1A is a perspective view, and FIG. 1B is a front view. In this example, a corrugated plate-like wood molding 1 produced by forming a wood flake coated with an adhesive resin (hereinafter referred to as “binder” as appropriate) and hot-pressing the formed wood flake with a mold. It is shown.
As shown in the figure, the woody molded product 1 of this example has a shape in which a flat surface portion 2 and a slope portion 3 are connected to each other, and a portion where one flat surface portion 2 and slope portions 3 and 3 on both sides thereof are connected. Has a substantially isosceles trapezoidal cross section. The inclination angle A of the inclined surface portion 3 with respect to the flat surface portion 2 shown in FIG. 1B is preferably 45 to 75 degrees, more preferably 55 to 65 degrees, and particularly preferably 60 degrees. In the woody molded product 1 in this example, for example, the average thickness of the wood flakes 10 shown in FIG. 4 is in the range of 0.1 mm to 0.6 mm, and the average length of the wood flakes 10 is the wooden molded product. It is assumed that it is larger than the depth D of 1 unevenness, that is, larger than the height of the trapezoid.

Another example of the wood molded product according to the present invention is shown in FIG. FIG. 2A is a perspective view, and FIG. 2B is a front view. The woody molded article 11 in this example is also manufactured by forming a wood flake coated with an adhesive resin (hereinafter referred to as “adhesive resin” as appropriate) and hot-pressing the formed wood flake with a mold.
Similar to the example of FIG. 1, the woody molded article 11 of this example has a shape in which the flat surface portion 12 and the slope portion 13 are coupled, and one flat surface portion 2 and the slope portions 3 and 3 on both sides thereof are connected. 1 is different from the example of FIG. 1 in that the cross section of the isosceles trapezoidal shape of the wood molded product 1 shown in FIG. 1 is repeated at equal intervals. . The inclination angle A of the slope 13 shown in FIG. 2B is preferably 45 to 75 degrees, more preferably 55 to 65 degrees, and particularly preferably 60 degrees. In this example of the wooden molded article 11, the average thickness of the wood flakes 10 is in the range of 0.1 to 0.6 mm, and the average length of the wooden flakes 10 is greater than the depth D of the irregularities of the wooden molded article. That is, it is assumed that it is larger than the height of the trapezoid. In addition, in the woody molded product of this example, the depth D of the unevenness of the wooden molded product, that is, the height of the trapezoid is in the range of 10 to 50 mm. The length of the repeated pitch of the trapezoidal cross section indicated by P in FIG. 2 is in the range of 30 to 150 mm, preferably in the range of 40 to 140 mm.
In the woody molded product according to the present invention, the cross section may be curved as shown in FIG. 2 (c), and the cross section may be a saw blade as shown in FIG. 2 (d).

An example of the wooden hollow panel according to the present invention is shown in FIG. FIG. 3A is a perspective view, and FIG. 3B is a front view. The wood hollow panel 20 in this example is manufactured by bonding the wood boards 4 and 5 to both surfaces of the wood molding 11 shown in FIG.
Similar to the example of FIG. 2, the wood molded product used in the wood hollow panel 20 of this example has a shape in which the flat surface portion 22 and the slope portion 23 are connected, and one flat surface portion 22 and the slope portions 23 on both sides thereof. , 23 has a substantially isosceles trapezoidal cross section, and the isosceles trapezoidal cross section of the wooden molded body shown in FIG. 1 is repeated at equal intervals. The inclination angle A of the inclined surface portion 23 shown in FIG. 3B is preferably 45 to 75 degrees, more preferably 55 to 65 degrees, and particularly preferably 60 degrees.
In the wood hollow panel 21 of this example, the thickness average value of the wood flakes 10 is in the range of 0.1 to 0.6 mm, and the length average value of the wood flakes is larger than the depth D of the unevenness of the wood molded product. In other words, the height is larger than the trapezoidal height. In addition, in the woody hollow panel of this example, the depth of unevenness of the woody molded product, that is, the height of the trapezoid is assumed to be in the range of 10 to 50 mm. Further, the length of the pitch indicated by P in FIG. 3 is in the range of 30 to 150 mm, and preferably in the range of 40 to 140 mm.

An example of the wood flake 10 used in the present invention is shown in FIG. The raw material for the wood flakes 10 is not particularly limited, and various softwood and hardwood flakes can be used. Specific examples include flakes such as aspen, radiata pine, lodgepole pine, cedar, hinoki, red pine, spruce, and todomatsu.
These hardwood or coniferous wood is made into thin pieces using a disk flaker or the like.

  The wood flake 10 used in the present invention has an absolute thickness value of 0.05 to 1.0 mm and an average thickness value of 0.10 to 0.60 mm. Here, the absolute value of the thickness of the wood flakes 10 means the minimum and maximum thickness when 200 or more wood flakes 10 to be used are randomly extracted, and the average value of the thicknesses is the extracted wood quality. It shall mean the value which averaged the thickness of the thin piece 10. FIG. If the absolute value of the thickness of the wood flakes 10 is less than 0.05, the strength and rigidity of the panel obtained by molding the wood flakes will decrease, the volume during forming before pressing will increase, and the productivity will be disadvantageous. At the same time, the density after molding also increases. Moreover, when the absolute value of thickness exceeds 1.0 mm, the surface smoothness will fall. At present, the average thickness of timber flakes made in this way is 0.10 mm or more, and less than that is generally not used.

  In addition, the average length of the wood flakes 10 needs to be longer than the depth of unevenness of the wood molded product made of the wood flakes 10. Preferably, the average length of the wood flakes 10 is 10 mm longer than the depth of the unevenness of the wooden molded product, and more preferably the average length of the wood flakes 10 is 20 mm longer than the depth of the unevenness of the wooden molded product. The The length of the wood flakes 10 is appropriately selected according to the shape of the wood molding. The absolute value of the length of the wood flakes 10 is preferably within ± 10 mm with respect to the target length (average value). Here, the absolute value of the length of the wood flakes 10 means the minimum and maximum length when 50 or more wood flakes 10 to be used are extracted at random, and the average value of the length is the purpose and Means the value to be

Moreover, it is preferable that the absolute value of the width | variety of the wooden thin piece 10 exists in the range of 1.00-50.00mm and an average value of 5.00-35.00mm. Here, the absolute value of the width of the wood flakes 10 means the minimum and maximum widths when 50 or more wood flakes 10 to be used are randomly extracted, and the average value of the widths means the extracted wood flakes 10. It shall mean the value which averaged the width. When the absolute value of the width of the wood flakes 10 is less than 1.00 mm, adhesion failure in the width direction occurs, causing a decrease in strength. Further, if the absolute value of the width exceeds 50.00 mm, the wood flakes 10 are easily curled or bent, and the adhesive resin does not easily adhere to the inner side where it is bent when mixed with the adhesive resin. Poorly, voids (bubbles) are likely to be generated, and due to these, the wood flakes 10 are peeled off, and the smoothness of the surface of the resulting hollow panel is lowered.
Moreover, it is preferable that the wood flakes 10 forming the wood molding and the wood hollow panel are arranged so that the grain direction is substantially aligned in one direction. Or it is good also as several layer structure, and it is good also considering the grain direction of the wood flake 10 which makes an adjacent layer as an orthogonal direction, and a lower grain direction as a parallel direction. Furthermore, the ratio of the wood flakes 10 arranged in the same direction can be changed according to the strength and rigidity of the intended wood hollow panel.

  As the adhesive resin used in the present invention, any of a foamable adhesive resin that foams itself, a non-foamable adhesive resin, and a mixture thereof can be used. Among these, a foamable adhesive resin is preferably used. The foamable adhesive resin has a resin content only at the intersection of the wood flakes 10 and reduces the amount of resin used by expanding the small gaps in the wood flakes with the foamed cells. The density of the molded product and the woody hollow panel can be reduced. Furthermore, the foam cell can improve the heat insulation and soundproofing effect of the wooden hollow panel.

  As the foaming adhesive resin, either a self-foaming foaming resin or a mixed foaming resin obtained by adding a foaming agent to a non-foaming resin such as phenol, melamine, urea, epoxy, or acrylic may be used. It is preferable that it is made of a foamable resin that self-foams from the viewpoint of improving rigidity and obtaining a low-density wooden hollow panel. Examples of the foamable resin that self-foams include a foamable polyurethane resin, an isocyanate-based resin, preferably PMDI (Polymeric Diphenyl Methane Diisocyanate or crude MDI) which is one of methylene diphenyl diisocyanate (MDI). When a foamable polyurethane resin or an isocyanate-based resin is used, it easily reacts with moisture, and the isocyanate group (—NCO) reacts with water and self-foams, so that the reaction time is increased and the press time can be shortened.

  In particular, when PMDI is used, the adhesive strength of the adhesive resin becomes strong. In addition, since this PMDI is foam-cured at a low temperature, the reaction time is fast. Specifically, the temperature at the time of hot pressing can be lowered to about 140 to 200 ° C., further to about 140 to 180 ° C., and the time is also aimed. Since the plate thickness (mm) × 10 to 15 seconds can be shortened, the hot pressing process can be shortened. Also, when PMDI is used as an adhesive resin, the molding temperature is as low as 140 to 180 ° C. as described above, so that the decomposition of the release agent can be suppressed, the mold release property is good, and the molding work efficiency is improved. To do.

The ratio of the adhesive resin to the wood flakes 10 constituting the wood hollow panel is preferably 3.5 to 20 parts by weight with respect to 100 parts by weight (absolute dry weight) of the wood flakes 10. By changing the addition amount of the adhesive resin, the density and strength of the obtained wooden hollow panel can be changed.
If necessary, a curing agent, a curing catalyst, a curing accelerator, a diluent, a thickener, a dispersant, a water repellent, and the like may be added to the adhesive resin.

  The wood flakes 10 are preferably acetylated in advance. When the wood flakes 10 are acetylated, the wood flakes 10 are dried to a moisture content of 3% or less, preferably 1% or less, and then contacted with vaporized vapor such as acetic acid, acetic anhydride, chloroacetic acid, etc. Among them, acetylation (degree of acetylation of 12 to 20%) is preferable. By acetylating the wood flakes 10 in this way, water resistance is obtained, and dimensional stability can be imparted to the wood hollow panel.

  Next, an adhesive resin for bonding the wood flakes 10 is attached on the surface of the wood flakes 10. For mixing the wood flakes 10 and the adhesive resin, a spraying method is usually used. For example, a wooden flake 10 with the size and moisture content adjusted as described above is placed in a rotating drum that rotates at a low speed, and when the wooden flake 10 naturally falls in this rotating drum, the adhesive resin is applied to the wooden flake 10. A spray coating method is preferred.

When the adhesive resin is applied to the wood flakes 10 by a spray method, it is dissolved in a solvent in advance and applied as a solution. In addition, when using a spray apparatus with good uniform dispersion, dilution with a solvent is unnecessary.
Next, the wood flakes with the adhesive resin adhering to the wood flakes 10 are removed by removing a solvent such as water or acetone contained in the adhesive resin.

An example of the manufacturing method of the wood molding 1 which concerns on this invention is shown in FIG. In this example, the method for producing the wood molded product 11 shown in FIG. 2 is shown, but the wood molded product 1 shown in FIG. 1 can be produced by the same method.
The wood flakes coated with the adhesive resin are formed on the flat plate 6, and the flat plate 6 is set on the lower mold 7 (FIG. 5A). Thereafter, the upper die 8 is lowered and the flat plate 6 is pulled out while appropriately pressing the wood flakes (FIG. 5B). Thereby, the formed wood flakes 9 are dropped onto the lower mold 7 (FIG. 5C). Next, the upper mold 8 is lowered so as to fit the upper mold 7, and hot-pressure molding is performed at a temperature of 140 to 220 ° C. and a pressure of 15 to 50 kg / cm ² for 1 to 15 minutes (FIG. 5D).

  The wooden hollow panel 20 according to the present invention can be obtained by bonding a wooden board to the wooden molded article 11 obtained by the manufacturing method. As a kind of the wood board, a plywood, a fiber board, an oriented strand board (hereinafter abbreviated as “OSB”) and the like are used.

  In the wood molded product of the present invention, the thickness average value of the wood flakes is in the range of 0.1 to 0.6 mm, and the length average value is larger than the depth of unevenness of the wood molded product obtained using the wood flakes as a material. By doing so, a bending Young's modulus becomes a high value and it has high rigidity. In addition, by setting the depth of the unevenness of the wooden molded product in the range of 10 to 50 mm and the pitch (length) in the range of 30 to 150 mm, in the wooden hollow panel using this wooden molded product, the apparent density is It is not excessively large, is lightweight, has a high average bending Young's modulus, and exhibits high rigidity.

A wood molded product according to an embodiment of the present invention was manufactured and tested for rigidity and the like.
Production Example 1
A wood molded product (hereinafter referred to as “corrugated sheet” as appropriate) shown in FIG. 2 of the embodiment was produced. Aspen was used as the wood, and PMDI was used as the adhesive resin.
The thickness average value of the wood flakes is in the range of 0.1 to 0.6 mm, and the length average value of the wood flakes is larger than the depth of the unevenness of the wood molded product, as Examples 1 to 3, and the thickness of the wood flakes The thickness average value was in the range of 0.1 to 0.6 mm, and the length average value of the wood flakes was set to be equal to or less than the depth of the unevenness of the wood molded product as Comparative Examples 1 to 3, and the thickness average value of the wood flakes Was set to be larger than 0.6 mm, and the average length of the wood flakes was set to be equal to or less than the depth of the unevenness of the wood molded product was designated as Comparative Example 4-1.
In Example 1, a wood flake with an average thickness of 0.1 mm was used, and the length average value or pitch of the wood flake was changed to be Examples 1-1 to 1-4.
In Example 2, a wood flake with an average thickness of 0.3 mm was used, and the length average value or pitch of the wood flake was changed to obtain Examples 2-1 to 2-4.
In Example 3, the thickness average value of the wood flakes was 0.6 mm, and the length average value or pitch of the wood flakes was changed to be Examples 3-1 to 3-4.
In Comparative Example 1, a wood flake having an average thickness of 0.1 mm was used, and the length average value and the unevenness depth of the wood flake were changed to obtain Comparative Examples 1-1 and 1-2.
In Comparative Example 2, a wood thin piece having an average thickness of 0.3 mm was used, and the length average value and the unevenness depth of the wood thin piece were changed to be Comparative Examples 2-1 and 2-2.
In Comparative Example 3, a wood thin piece having an average thickness of 0.6 mm was used, and the length average value and the unevenness depth of the wooden thin piece were changed to obtain Comparative Examples 3-1 and 3-2.
A wooden board was bonded to both sides of these wooden moldings (corrugated sheets) to obtain a wooden hollow panel. The inclination angle A was 60 degrees. As the wood board, an OSB having a thickness of 5 mm, a density of 0.6 g / cm ³ , and a bending Young's modulus of 50 tonf / cm ² was used.

Test example 1
About these woody hollow panels, the value of the apparent density and the average bending Young's modulus was measured. Here, the apparent density is expressed by hollow panel / (length × width × height of the hollow panel), and the average bending Young's modulus is the average of the bending Young's modulus in the vertical and horizontal directions in the wood hollow panel. It means the value.
As evaluation criteria for the woody hollow panel, those with an apparent density of less than 0.40 g / cm ³ were accepted, and those with a density of 0.40 g / cm ³ or more were rejected. Those having an average bending Young's modulus of 25 tonf / cm ² or more were accepted, and those having an average bending Young's modulus of less than 25 tonf / cm ² were rejected. The results are shown in Table 1.

From this, it can be seen that when the average thickness of the wood flakes is larger than 0.6 mm, the bending Young's modulus is remarkably lowered. This is presumed to be caused by the fact that when the average thickness of the wood flakes is 0.6 mm or more, the adhesion area of the wood flakes is reduced, and the wood flakes are easily broken.
It can also be seen that the bending Young's modulus is significantly reduced when the average length of the wood flakes is equal to or less than the depth of the irregularities of the wood molding. This is because if the average length of the wood flakes is not more than the depth of the unevenness of the wood molding, the wood flakes will fall into the recess of the mold and the uniformity of the wood molding will deteriorate Guessed.

Production Example 2
A wood molded product (hereinafter referred to as “corrugated sheet” as appropriate) shown in FIG. 2 of the embodiment was produced. Aspen was used as the wood, and PMDI was used as the adhesive resin.
In Production Example 2, the thickness average value of the wood flakes was set in the range of 0.1 to 0.6 mm, and the length average value of the wood flakes was made larger than the depth of the unevenness of the wood molded product.
Examples in which the maximum depth of the unevenness is in the range of 10 to 50 mm, the length of the repeated pitch of the cross-section of the same shape is 30 to 150 mm, are Examples 2 and 3, and the maximum depth of the unevenness is 10 Comparative Examples 2 and 3 were made outside the range of ˜50 mm and the length of the repeated pitch of the cross section of the same shape outside the range of 30 to 150 mm.
In Example 2, the thickness average value of the wood flakes was 0.3 mm, and the length average value of the wood flakes, the unevenness depth, and the pitch were changed, and Examples 2-5 to 2-8 were obtained. .
In Example 3, the thickness average value of the wood flakes was 0.6 mm, and the length average value of the wood flakes, the unevenness depth, and the pitch were changed to be Examples 3-5 to 3-8. .
In Comparative Example 2, a wood flake with an average thickness of 0.3 mm was used, and the wood flake length average value, uneven depth, and pitch were changed to be Comparative Examples 2-3 to 2-6. .
In Comparative Example 3, a wood flake with an average thickness of 0.6 mm was used, and the wood flake length average value, uneven depth, and pitch were changed to be Comparative Examples 3-3 to 3-6. .
A wooden board was bonded to both sides of these wooden moldings (corrugated sheets) to obtain a wooden hollow panel. The inclination angle A was 60 degrees. As the wood board, an OSB having a thickness of 5 mm, a density of 0.6 g / cm ³ , and a bending Young's modulus of 50 tonf / cm ² was used.

Test example 2
In the same manner as described above, the apparent density and the average bending Young's modulus of these wooden hollow panels were measured. As evaluation criteria for the woody hollow panel, those with an apparent density of less than 0.40 g / cm ³ were accepted, and those with a density of 0.40 g / cm ³ or more were rejected. Those having an average bending Young's modulus of 25 tonf / cm ² or more were accepted, and those having an average bending Young's modulus of less than 25 tonf / cm ² were rejected. The results are shown in Table 2.

Accordingly, when the depth of the unevenness of the wooden molded product is less than 10 mm, the apparent density becomes 0.40 g / cm ³ or more, which is not preferable. When the depth of the unevenness of the wooden molded product exceeds 50 mm, the average bending Young's modulus is 25 tonf. It turned out to be less than / cm ² .
When the pitch of the wood molding is less than 30 mm, the apparent density is not preferable because it is 0.40 g / cm ³ or more, and when the pitch of the wood molding is 150 mm or more, the average bending Young's modulus is less than 25 tonf / cm ² and is not preferable. I understood.

  Thus, in the present invention, it was found that a highly rigid and lightweight wood molded product and wood hollow panel can be obtained by adjusting the thickness and length of the wood flakes.

It is a figure which shows an example of the wooden molding of this invention. It is a figure which shows another example of the wooden molding of this invention. It is a figure which shows the example of the woody hollow panel of this invention. It is a figure which shows an example of the woody slice of this invention. It is a figure which shows the manufacturing method of the wooden molding of this invention.

Explanation of symbols

1 .... Wooden molded product 2 .... Plane part 3 .... Slope part 4 .... Wood board 5 .... Wood board 6, ... Flat plate, 7 .... Lower mold, 8 .... Upper mold, 9 ·· Formed wood flakes, 10 ·· Wood flakes, 11 ·· Wood molded products, 12 ·· Planar portion, 13 ·· Slope portion, 21 ·· Wooden hollow panel, 22 ·· Plane portion, 23 ·· Slope Part

Claims (5)

  An uneven wooden molded product obtained by bonding and laminating wood flakes having a thickness average value of 0.1 mm or more and 0.6 mm or less with a resin, and the average length of the wood flakes is the wood molding A wooden molded product characterized by being larger than the depth of the unevenness of the object.   The woody molded product according to claim 1, wherein the maximum depth of the unevenness is 10 mm or more and 50 mm or less.   The woody molded product according to claim 1 or 2, wherein the length of the repeated pitch of the cross section of the same shape is from 30 mm to 150 mm.   A wood hollow panel, wherein a wood board is bonded to one side or both sides of the wood molded product according to any one of claims 1 to 3. The method for producing a woody molded product according to any one of claims 1 to 3 and a method for producing a woody hollow panel according to any one of claims 1 to 3, wherein the wood flakes are adhesively laminated with a resin.

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