JP6719690B1 - Natural wood composite material and molded products using the same - Google Patents

Abstract

To provide a natural wood composite material that retains the texture and feel of natural wood and can maintain the shape formed by preforming during the period from preforming to resin molding. A natural wood composite material 10 comprising a natural wood flexible sheet 12 having folding endurance and a mesh material 14 which is provided on the back side of the natural wood flexible sheet 12 and undergoes plastic deformation, wherein the mesh material 14 is plastically deformed. As a result, the natural wood flexible sheet 12 is also deformed following the mesh material 14, and the shape after plastic deformation is maintained for the period until plastic molding after plastic deformation.

Description

TECHNICAL FIELD The present invention relates to a natural wood composite material having a natural wood flexible sheet and a molded product using the same.

BACKGROUND ART Heretofore, a bag, a coin purse, a book cover and the like have been manufactured by slicing natural wood into a sheet shape and using a sheet-shaped natural wood thin plate material. However, wood, which is a natural polymer, becomes a glassy polymer that easily breaks brittlely when dried. Therefore, the natural wood sheet material is often broken or damaged due to bending or contact. In order to solve this problem, a mixture of a synthetic resin and a linear polymer compound having a vapor pressure of 1.3 kPa or less at room temperature is filled in the voids of a natural wood thin plate material as in Patent Document 1, and the bending resistance is increased. A natural wood flexible sheet characterized by having a height is disclosed.

Since the natural wood flexible sheet of Patent Document 1 retains the texture and feel of natural wood and is expected to have a healing effect, in recent years the natural tree flexible sheet of Patent Document 1 has been applied to the surface of mobile phone covers and home appliances. The product used has been developed. When molding the surface of a mobile phone cover, home electric appliances, etc. using the natural wood flexible sheet of Patent Document 1, the natural wood flexible sheet is pre-shaped by press molding or the like to the shape of the surface of the molded product, and pre-shaped. The natural wood flexible sheet is applied to the surface by injection molding in which resin is injected from the back side of the shaped natural wood flexible sheet, or by vacuum forming or pressure forming in which the preshaped natural wood flexible sheet is attached to the molded product. Manufactures molded products that have. By using the natural wood flexible sheet of Patent Document 1, even if the portion has a large curvature, for example, a corner of a mobile phone, the natural wood flexible sheet on the surface can be followed without being broken or damaged. It is possible to obtain a molded product having a natural wood flexible sheet on its surface.

Japanese Patent No. 3536048

However, the natural wood flexible sheet of Patent Document 1 may be filled with the resin only in about 70% of voids such as cells or cell gaps of the natural wood thin plate material on the surface, and even if it is formed by press molding or the like, After molding, moisture in the air is taken in from the voids of the natural wood sheet material, and the natural wood sheet material elastically deforms, so it is easy to return to the original shape, and the problem that the shape pre-shaped by press molding etc. cannot be maintained there were. Therefore, if it takes a long time to perform injection molding after preforming, the preshaped shape cannot be maintained, and it will not fit in the mold for injection molding during injection molding. was there. Further, during vacuum pressure forming, the natural wood flexible sheet may be damaged due to thermal expansion of the base material.

Therefore, a main object of the present invention is to provide a natural wood composite material capable of maintaining the shape formed by the preliminary shaping during the period from the preliminary shaping to the resin molding.

The natural wood composite material according to the present invention includes a natural wood thin plate material, and a synthetic resin and a polymer compound are filled in the cells of the natural wood thin plate material, the cell gaps, the conduit portions, and the sieving tube portions to prevent folding. A natural wood flexible sheet having strength, and a mesh material that is provided on the back side of the natural wood flexible sheet and plastically deforms. By plastically deforming the mesh material, the natural wood follows the mesh material. The flexible sheet is also deformed, and after being plastically deformed, the shape after the plastic deformation is maintained until the resin is molded.

Since the mesh material can be plastically deformed almost permanently, the natural wood composite material including the natural wood flexible sheet retains its shape for a long time even when plastically deformed. By providing the mesh material on the back side of the natural wood flexible sheet, the stress applied to the natural wood composite material can be dispersed, so that the natural wood flexible sheet follows the mesh material and the natural wood composite material is not damaged. Complex shapes can be molded without breakage. Further, even if the natural wood flexible sheet is elastically deformed by absorbing moisture in the air, the mesh material is plastically deformed, so that the shape of the preformed natural wood composite material can be maintained.

ADVANTAGE OF THE INVENTION According to this invention, the natural wood composite material which can maintain the shape shape|molded by preliminary shaping|molding can be provided for a period until resin-forming after preforming.

The above-mentioned objects, other objects, features and advantages of the present invention will be more apparent from the following description of the embodiments for carrying out the invention with reference to the drawings.

It is a schematic diagram of the natural composite material which concerns on this invention. It is a schematic diagram of the modification of the natural composite material which concerns on this invention. It is a figure which shows the location measured in the experiment of the natural composite material which concerns on this invention. It is a figure which shows the process of manufacturing a preshaped article from the natural wood composite material which concerns on this invention. It is a figure which shows the process of manufacturing a molded product using the preshaped product manufactured from the natural wood composite material which concerns on this invention. It is a figure which shows the change of the width direction W in 1 month after preliminary shaping|molding in the experiment of the natural composite material which concerns on this invention.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

1. Natural Wood Composite Material The natural wood composite material 10 of the present invention is a laminate of a natural wood flexible sheet 12 and a mesh material 14. The present invention will be described with reference to FIG. FIG. 1 shows an illustrative view of a natural wood composite material 10 according to the present invention.

The natural wood composite material 10 includes a natural wood flexible sheet 12 having folding strength and a mesh material 14 which is provided on the back side of the natural wood flexible sheet 12 and plastically deforms. The natural wood flexible sheet 12 and the mesh material 14 are, for example, the back surface of the natural wood flexible sheet 12, that is, the surface opposite to the surface to be the surface of the molded product, and the surface of the mesh material 14 on the natural wood flexible sheet 12 side. And are adhered to each other with an adhesive or the like. When using an adhesive, a known adhesive can be used. The natural wood composite material 10 is plastically deformed by press molding or the like of the mesh material 14, so that the natural wood flexible sheet 12 is also deformed following the mesh material, and is plastically deformed until plastic molding is performed. The shape after deformation can be maintained.

(1) Natural Wood Flexible Sheet The natural wood flexible sheet 12 of the natural wood composite material 10 is, for example, a synthetic resin and a linear polymer in a cell of a natural wood thin plate material, cell gaps, voids such as a conduit portion and a sieve tube portion. It is filled with a compound. The natural wood flexible sheet 12 has flexibility and folding resistance because the natural resin is filled with the synthetic resin and the polymer compound in the cells of the natural wood thin plate material, the voids such as the cell gap, the conduit portion, and the sieve tube portion.

The thickness of the natural wood thin plate material used for the natural wood flexible sheet 12 is 0.1 mm or more and 5.0 mm or less. Preferably, the thickness of the natural wood thin plate material is 0.15 mm or more and 0.20 mm or less. This is because a veneer thinner than 0.1 mm cannot be mechanically manufactured, and a veneer thicker than 5.0 mm is difficult to fill with a synthetic resin or the like. In addition, buffing or the like may be performed in order to adjust the thickness. In addition, the type of natural wood sheet material is not limited. For example, white sycamore, mahogany, bird's eye maple, anigle, teak, bamboo and the like are used.

The synthetic resin used for the natural wood flexible sheet 12 is, for example, polyester resin, polyamide resin, cellulose resin, styrene resin, epoxy resin, urethane resin, or the like.
Further, a linear polymer mainly exists in a synthetic resin and coexists. The linear polymer compound is, for example, a linear polymer compound having a vapor pressure of 1.3 kPa or less at room temperature. Specifically, polyethylene glycol, polyethylene terephthalate, polyethylene and the like are used. When the linear polymer compound is sorbed in wood, the skeletal structure of wood swells, the synthetic resin is easily filled, and the flexibility due to wetting increases, so that the workability also improves.

(2) Mesh Material The mesh material 14 of the natural wood composite material 10 is a sheet having a plurality of openings made of metal or resin, for example. The mesh material 14 is provided on the back surface side of the natural wood flexible sheet 12. In the case of only the natural wood free sheet 12, the shape cannot be maintained because the stress remains when it is deformed. However, since the mesh material 14 has a plurality of openings and the openings can be changed according to the shape, no stress remains and the shape can be maintained even when plastically deformed. By providing the mesh material 14 on the back side of the natural wood flexible sheet 12, the natural wood flexible sheet 12 is reinforced, and the natural wood flexible sheet 12 and the mesh material 14 are plastically deformed to press a complicated shape having a large curvature. Even if the natural wood composite material 10 is formed by molding or the like, the stress applied to the natural wood composite material 10 is dispersed, and the natural wood composite material 10 can follow well and a complicated shape can be formed. In addition, the natural wood flexible sheet 12 may be filled with the resin only in about 70% of voids such as cells or cell gaps of the natural wood thin plate material on the surface, and even if it is molded by press molding or the like, it is natural after molding. There was a problem that the natural wood thin plate material was elastically deformed by taking in water in the air from the voids of the wood thin plate material, so that it was easy to return to its original shape and the shape pre-shaped by press molding or the like could not be maintained. Since the mesh material 14 is plastically deformed almost permanently by applying the mesh material 14, even if the natural wood flexible sheet 12 is elastically deformed by absorbing moisture in the air, the shape of the natural wood composite material 10 is changed. Can be maintained.

Further, the aperture ratio of the mesh material 14 is preferably 25% or more and 52% or less. If a mesh material having an opening ratio of less than 25% is used, the stress applied to the natural wood composite material 10 cannot be dispersed. If the opening ratio of the mesh material is 52% or more, the elastic force of the natural wood flexible sheet 12 is increased. This is because the natural wood flexible sheet 12 pulls the mesh material 14 and cannot maintain the shape of the natural wood composite material 10. Furthermore, a molded product that is lighter than a sheet having no opening can be obtained.
Further, the thickness of the mesh material 14 is preferably 0.050 mm or more and 0.630 mm or less.

The metal mesh material has a plurality of openings such as punched metal, plain weave wire mesh, and twill weave wire mesh. The shape of the opening can have, for example, a circular shape, or a polygonal shape such as a triangle, a quadrangle, or a hexagon, and it is also possible to use a combination thereof. In particular, by using a metal mesh material, the metal mesh material is plastically deformed, so that the preshaped shape can be maintained.

Further, as the material, various materials such as iron, copper, nickel, aluminum, tungsten, and other alloys such as stainless steel and brass can be used. In particular, it is preferable to use a stainless steel mesh material that does not easily rust. The thickness of the metal mesh material is preferably 0.03 mm or more and 0.12 mm or less. This is because when the thickness of the metal mesh material is 0.03 mm or less, the elastic deformation of the natural wood flexible sheet 12 is followed and the preshaped shape cannot be maintained. Further, if the thickness of the metal mesh material is 0.12 mm or more, the thickness increases, and the formability deteriorates.

In particular, when using a metal mesh material, the aperture ratio of the metal mesh material is preferably 25%. By setting the aperture ratio to 25%, it is possible to deform without leaving residual stress.

The resin mesh material is, for example, a punched plastic plate, a resin net, or the like having a plurality of openings. The shape of the opening can have, for example, a circular shape, or a polygonal shape such as a triangle, a quadrangle, or a hexagon, and it is also possible to use a combination thereof. When a resin net is used as the resin mesh material, the intersections of the resin threads may be welded.

As the material, various materials such as polyethylene, polyester, polypropylene, nylon and fluororesin can be used. Particularly, a resin having a glass transition point higher than room temperature (about 20° C.) or a resin capable of crystallization is preferable.

The resin having a glass transition point higher than room temperature (about 20° C.) is, for example, polyvinyl chloride, polyamide, polylactic acid, polyethylene terephthalate or the like. When the glass transition point of the mesh material 14 is a resin having a temperature higher than room temperature, the resin mesh material is also heated into a rubber state by being heated in the mold at the time of preliminary shaping, and is cooled by the preliminary shaping. Since it is plastically deformed into the shape of the mold for use, it is possible to maintain the preshaped shape. Further, it is preferable to use a resin having a glass transition point of room temperature (about 20° C.) or higher and 70° C. or lower. This is because if a resin having a glass transition point of 70° C. or higher is used, the mold must be set to 70° C. or higher during preliminary shaping, and the natural wood flexible sheet 12 is damaged by heat.

The crystallizable resin is, for example, polyethylene or polypropylene. Even if the mesh material 14 is a resin whose glass transition point is lower than room temperature, when the resin is capable of crystallizing, the crystals move during the preliminary shaping, so that the preshaped shape can be maintained. it can.

In particular, when a resin mesh material is used, the resin mesh material preferably has an aperture ratio of 42% or more and 52% or less. When the aperture ratio is smaller than 42%, for example, when a resin plate (aperture ratio 0%) is used, only the bent portion of the resin plate is deformed. That is, the stress concentrates only on the folded portion, and the resin plate may be broken. By using the mesh material, the force applied to the mesh material can be dispersed, and the shape can be easily given. Further, when the opening ratio is larger than 52%, the elastic deformation of the natural wood flexible sheet 12 is followed, and the preshaped shape cannot be maintained.

2. Molded Product Using Natural Wood Composite Material By using the natural wood composite material 10 on the surface of furniture, home appliances, interiors and exteriors of cars, etc., a molded product using the natural wood composite material 10 on its surface can be obtained. By using the natural wood composite material 10, the natural wood flexible sheet 12 can follow the natural wood flexible sheet even if it has a large curvature, for example, a corner of a mobile phone, without being broken or damaged. It is possible to obtain a molded product having the wood flexible sheet 12 on the surface. In addition, by using the natural wood composite material 10 in parts that are noticeable to people, such as furniture, home appliances, and interior and exterior of cars, it is possible to manufacture products that are lighter than natural wood while achieving the healing effect of natural wood. Is.

3. Method for Manufacturing Natural Wood Composite Material A method for manufacturing the natural wood composite material 10 according to the present invention will be described.

First, the natural wood flexible sheet 12 is prepared. The natural wood flexible sheet 12 has folding resistance. The natural wood flexible sheet 12 is manufactured by a known method (Patent Document 1, etc.).

Next, an adhesive (not shown) is applied to the back surface side of the natural wood flexible sheet 12, and the mesh material 14 is attached. As the adhesive, a known adhesive can be used. The natural wood flexible sheet 12 and the mesh material 14 may be bonded to each other through a different material such as cotton or non-woven fabric.

Finally, the natural wood composite material 10 is manufactured by pressing and drying.

4. Method for Manufacturing Molded Product Using Natural Wood Composite Material A method for manufacturing a molded product having the natural wood composite material 10 on its surface will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram showing a process of manufacturing a preshaped product from the natural wood composite material according to the present invention. FIG. 5: is a figure which shows the process of manufacturing a molded product using the preshaped product manufactured from the natural wood composite material which concerns on this invention.

As shown in FIG. 4, the natural wood composite material 10 is pre-shaped by, for example, pressing or the like to obtain a pre-shaped product 24. When preforming by pressing, the natural wood composite material 10 is placed in the mold 22, and then the temperature of the mold 22 is raised to plastically deform the natural wood composite material 10. After that, the mold 22 is left as it is until it cools, and the mold 22 is taken out. In this way, the preshaped article 24 can be obtained. In the embodiment of the present invention, the natural wood composite material 10 is preshaped by press molding in order to obtain the preshaped product 24. However, a molding method other than press molding, for example, vacuum molding, pressure molding, embossing. The natural wood composite material 10 can be preshaped by molding, bending, or the like.

Then, resin molding is performed using the preshaped product 24 to obtain a molded product 34. Examples of resin molding methods include injection molding, vacuum molding, and pressure molding.
When a molded product is manufactured by injection molding, as shown in FIG. 5(A), the prepared preshaped product 24 is placed in the injection molding die 32, and heat is applied to the back surface side of the natural wood composite material 10. A molded product 34 is manufactured by injecting a plastic resin and cooling it.
When a molded product is manufactured by vacuum forming, as shown in FIG. 5B, an adhesive or the like is applied to the back surface side of the natural wood composite material 10 so that the space between the natural wood composite material 10 and the base material 36 is reduced. The molded product 34 is manufactured by sucking air to bring the natural wood composite material 10 into close contact with the base material 36.
When a molded product is manufactured by pressure molding, as shown in FIG. 5(C), an adhesive or the like is applied to the back side of the natural wood composite material 10 and compressed air is used to naturally compress the natural wood composite material 10. By pressing the natural wood composite material 10 against the base material 36 by pressing it against the base material 36 from the sheet 12 side, the molded product 34 is manufactured.

5. Modified Example A modified example of the natural wood composite material 10 according to the embodiment of the present invention will be described with reference to FIG. 2. FIG. 2 is a schematic diagram of a modified example 10A of the natural composite material according to the present invention. It should be noted that a natural wood composite material 10A that is a modified example of the present invention refers to FIG. 1 except that a sheet material 16 is attached to the back surface side of a mesh material 14 that is a configuration of the natural wood composite material 10. It has the same structure as the natural wood composite material 10 described above. Therefore, the same reference numerals are given to the same portions, and the similar description will not be repeated.

The natural wood composite material 10A includes a natural wood flexible sheet 12, a mesh material 14, and a sheet material 16.

The sheet material 16 of the natural wood composite material 10A is, for example, cotton, non-woven fabric, Japanese paper, western paper, synthetic paper, canvas, pigskin, synthetic resin film, or the like. By sticking the sheet material 16 on the back surface side of the mesh material 14, it is possible to prevent the natural wood flexible sheet 12 and the mesh material 14 from being separated. A known adhesive can be used when the sheet material 16 is attached. Further, when a metal mesh material is used as the mesh material 14, the end portion of the metal mesh material has a sharp blade shape, which may injure the operator. By sticking the sheet material 16 on the back surface side of the mesh material 14, the end portion of the mesh material can be covered, so that the work can be performed more safely. Further, in order to ensure the moldability of the natural wood composite material 10A, the sheet material 16 is preferably as thin as possible. The thickness of the sheet material 16 is preferably 0.1 mm or less, for example.

The sheet material 16 of the natural wood composite material 10A is preferably a woven fabric of cotton or chemical fiber. When the sheet material 16 is a woven fabric, the warp yarns and the weft yarns are woven so as to intersect with each other, so that the deviation between the yarns can be reduced. Therefore, even if the natural wood flexible sheet 12 absorbs moisture in the air and is elastically deformed, not only the mesh material 14 but also the woven fabric that is the sheet material 16 suppresses elastic deformation of the natural wood flexible sheet 12. The elastic deformation of the wood composite material 10A can be suppressed. Therefore, the natural wood composite material 10A to which a fabric such as cotton is further applied as the sheet material 16 is preshaped rather than the natural wood composite material 10 to which the natural wood flexible sheet 12 and the mesh material 14 are attached. The shape can be maintained for a longer time.

When the sheet material 16 is attached to the back surface side of the mesh material 14, the aperture ratio of the mesh material 14 is preferably 25% or more and 60% or less. When a mesh material having an opening ratio of less than 25% is used, the stress applied to the natural wood composite material 10A cannot be dispersed, and when a mesh material having an opening ratio of more than 60% is used, the elastic force of the natural wood flexible sheet 12 is increased. This is because the natural wood flexible sheet 12 pulls the mesh material 14 and the shape of the natural wood composite material 10A cannot be maintained. Further, the thickness of the mesh material 14 is preferably 0.050 mm or more and 0.630 mm or less. By adhering the sheet material 16, it is possible to use the mesh material 14 having a wider aperture ratio or a wider range than the natural wood composite material 10 in which the natural wood flexible sheet 12 and the mesh material 14 are adhered.

When a metal mesh is used as the mesh material 14, the aperture ratio of the metal mesh material 14 is preferably 25% or more and 60% or less. By adhering the sheet material 16, it is possible to use the mesh material 14 having a wider aperture ratio or a wider range than the natural wood composite material 10 in which the natural wood flexible sheet 12 and the mesh material 14 are adhered.

When a resin mesh is used as the mesh material 14, the resin mesh material 14 preferably has an aperture ratio of 38% or more and 56% or less. By adhering the sheet material 16, it is possible to use the mesh material 14 having a wider aperture ratio or a wider range than the natural wood composite material 10 in which the natural wood flexible sheet 12 and the mesh material 14 are adhered.

6. Molded product using natural wood composite material 10A Like the natural wood composite material 10, the natural wood composite material 10A is used on the surface of furniture, home appliances, interiors and exteriors of cars, etc. The used molded product can be obtained. By using the natural wood composite material 10A, the natural wood flexible sheet can follow the natural wood flexible sheet even if it has a large curvature, such as a corner of a mobile phone, without breaking or damaging the natural wood flexible sheet. A molded product having a flexible sheet on the surface can be obtained. In addition, by using the natural wood composite material 10A in parts that are noticeable to people such as furniture, home appliances, and interior and exterior of cars, it is possible to manufacture products that are lighter than natural wood while achieving the healing effect of natural wood. Is.

7. Method for Manufacturing Natural Wood Composite Material 10A A method for manufacturing the natural wood composite material 10A according to the present invention will be described. The natural wood composite material 10A, which is a modified example of the present invention, is the same as the natural wood composite material 10 except that the sheet material 16 is attached to the back surface side of the mesh material 14 which is the structure of the natural wood composite material 10. It has the configuration of. Therefore, the same reference numerals are given to the same portions, and the similar description will not be repeated.

First, the natural wood flexible sheet 12, the mesh material 14, and the sheet material 16 are prepared. Next, an adhesive (not shown) is applied to the back surface side of the natural wood flexible sheet 12, and the mesh material 14 is attached. Then, an adhesive (not shown) is applied to the back surface side of the mesh material 14, and the sheet material 16 is attached. As the adhesive, a known adhesive can be used. The natural wood flexible sheet 12 and the mesh material 14 may be bonded to each other through a different material such as cotton or non-woven fabric. Finally, the natural wood composite material 10A is manufactured by pressing and drying.

8. Method of Manufacturing Molded Product Using Natural Wood Composite Material 10A A method of manufacturing a molded product having the natural wood composite material 10A on its surface will be described. The natural wood composite material 10A has the same structure as the natural wood composite material 10 except that the sheet material 16 is attached to the back surface side of the mesh material 14 which is the structure of the natural wood composite material 10. Therefore, the same reference numerals are given to the same portions, and the similar description will not be repeated. As in the case of the natural wood composite material 10, preliminary molding is performed by pressing or the like to obtain a preliminary shaped product, and then resin molding such as injection molding, vacuum molding, or pressure molding is performed to manufacture the molded product.

9. Experimental Data The following experiments were performed on Examples 1 to 22 and Comparative Example 1 according to the present invention, and it was confirmed whether or not the pre-shaped shape was maintained for one month after the pre-shaped shape. Table 1 shows the used mesh materials and their changes. In Examples 1 to 22, mesh materials having different aperture ratios and different thicknesses were used.

The samples were arranged and stored in a flat place in a room with a temperature of 23° C. (±1° C.) and a humidity of 50%. At the time of preliminary shaping, the length W in the width direction (see FIG. 3A) of each sample was measured one month after the preliminary shaping. The measurement was performed using a third-dimensional real-time motion measurement system (manufactured by Novitech Co., Ltd.).

FIG. 6 shows the amount of change in the width W in Table 1 above. FIG. 6 is a diagram showing a change in the width direction W one month after preliminary shaping in the experiment of the natural composite material 10 according to the present invention. It should be noted that a product in which the change in the width direction W was smaller than that in the comparative example was judged as a good product.

From FIG. 6, when only the natural wood flexible sheet 12 and the mesh material 14 are used, that is, when the sheet material 16 is not used, when a mesh material having an aperture ratio of 25% or more and 52% or less is used, it is a non-defective product. Became. When the natural wood flexible sheet 12, the mesh material 14, and the sheet material 16 were used, the case where the opening ratio was 25% or more and 60% or less and the thickness was 0.050 mm or more and 0.630 mm or less was a good product. .. When cotton was used as the sheet material 16, the product had a good aperture ratio of 25% to 60% and a thickness of 0.050 mm to 0.630 mm. When a nonwoven fabric was used as the sheet material 16, it was judged to be a good product when the aperture ratio was 25% or more and 60% or less and the thickness was 0.050 mm or more and 0.630 mm or less.

From the above results, by attaching the metal or resin mesh material 14 to the back surface side of the natural wood flexible sheet 12, the pre-shaped shape is kept for a certain period (the period from pre-shaped to resin molding). Can be maintained. The natural wood flexible sheet 12 may be filled with resin only in about 70% of voids such as cells and cell gaps of the natural wood thin plate material on the surface. If there is a period before the resin molding, the moisture in the air is taken in from the voids of the natural wood thin plate material of the natural wood flexible sheet 12, and the natural wood thin plate material is elastically deformed. Although there was a problem that the formed shape could not be maintained, the natural wood composite material 10 in which the mesh material 14 was attached to the back side of the natural wood flexible sheet 12 could be easily plasticized by pressing the natural wood composite material 10. It can be transformed. Then, the natural wood composite material 10 that has been plastically deformed and given a shape can maintain the shape for a certain period of time, that is, the time until resin molding (injection molding or the like) is performed after preliminary shaping. Therefore, even if it takes some time to perform resin molding (such as injection molding) after the natural wood composite material 10 has been preliminarily shaped, when injection molding is performed, it will fit in the injection molding die and vacuum pressure molding will be performed. Can be attached without breaking the natural wood flexible sheet 12 when it is attached to a molded product.

In particular, by sticking a metal or resin mesh material having an opening ratio of 25% or more and 52% or less as the mesh material 14, the preshaped shape can be more maintained.

Further, by pasting the sheet material 16 of cotton or non-woven fabric on the back surface side of the mesh material 14, the preshaped shape can be more maintained. In particular, a non-woven fabric or a cotton product is attached as the sheet material 16 to the mesh material 14 having an opening ratio of 25% or more and 60% or less and a thickness of 0.050 mm or more and 0.630 mm or less to further maintain the preshaped shape. can do. By adhering the sheet material 16, it is possible to use the mesh material 14 having a wider aperture ratio or a wider range than the natural wood composite material 10 in which the natural wood flexible sheet 12 and the mesh material 14 are adhered.

Further, by using the natural wood composite material 10, 10A for the surface of furniture, home appliances, interiors and exteriors of cars, etc., a molded product using the natural wood composite material 10, 10A for the surface can be obtained. By using the natural wood composite materials 10 and 10A, the natural wood flexible sheet 12 can follow up without breaking or damaging the surface of the natural wood flexible sheet even in a portion having a large curvature, for example, a corner of a mobile phone. A molded product having the natural wood flexible sheet 12 on its surface can be obtained. In addition, by using the natural wood composite materials 10 and 10A in parts that are easily noticed by people, such as furniture, home appliances, and interiors and exteriors of cars, a product that is lighter than natural wood can be obtained while obtaining the healing effect of natural wood. Is possible.

As described above, the embodiment of the present invention is disclosed in the above description, but the present invention is not limited to this.
That is, various changes can be made to the embodiment described above with respect to the mechanism, shape, material, quantity, position, arrangement, etc. without departing from the technical idea and the scope of the object of the present invention. Which are included in the present invention.

10 10A Natural wood composite material 12 Natural wood flexible sheet 14 Mesh material 16 Sheet material 22 Mold 24 Preliminary shaped product 32 Injection molding mold 34 Molded product 36 Base material 42 Vacuum molding mold 52 Compressed air molding mold L Length in length W Length in width H Length in height

Claims (8)

A natural wood thin sheet containing a natural wood thin plate material, in which cells of the natural wood thin plate material are filled with a synthetic resin and a polymer compound in a cell gap, a conduit portion, and a gap of a sieve tube portion, and a natural wood flexible sheet having folding strength. ,
A mesh material that is provided on the back side of the natural wood flexible sheet and plastically deforms,
Equipped with
By plastically deforming the mesh material, the natural wood flexible sheet is also deformed following the mesh material, and the shape after plastic deformation is maintained until plastic molding after plastic deformation. Characteristic natural wood composite material. The natural wood composite material according to claim 1, wherein the resin molding is injection molding, vacuum molding, or pressure molding. The natural wood composite material according to claim 1 or 2, wherein the mesh material has an aperture ratio of 25% or more and 52% or less. A sheet material is further provided on the back surface side of the natural wood flexible sheet and on the back surface side of the mesh material, and the opening ratio of the mesh material is 25% or more and 60% or less. The natural wood composite material according to claim 1 or claim 2. A sheet material is further provided on the back side of the natural wood flexible sheet and on the back side of the mesh material, and the thickness of the mesh material is 0.050 mm or more and 0.596 mm or less. The natural wood composite material according to claim 1 or 2. The natural wood composite material according to claim 1, wherein the mesh material is made of metal. The natural wood composite material according to claim 1, wherein the mesh material is made of resin. A molded article using the natural wood composite material according to claim 1 on its surface.