KR102257993B1 - Composite material using wood - Google Patents

Abstract

The present invention relates to a composite material containing wood, and to articles to which a phenomenon in which a composite material is bent due to a difference in expansion rates of two or more composite layers by hygroscopic expansion and contraction of wood is applied. Any one of pine, cypress, cedar or paulownia wood is used for the wood (110), which is exposed to the outside and does not rot by rain and moisture, and has water resistance.

Description

Composite material using wood{COMPOSITE MATERIAL USING WOOD}

The present invention relates to a composite material containing wood, and more particularly, to an article applying a phenomenon in which the composite material is warped due to a difference in expansion rates of two or more composite layers due to moisture absorption expansion and contraction of wood.

Trees are largely classified into soft wood and hard wood according to the characteristics of the tree itself.

Softwood refers to a tree with sharp leaves like needles among conifers, that is, trees with leaves blooming all year round, and has a light and bright color inside. Representatively, there are pine, Japanese pine, cedar, and cypress.

Hardwood refers to a broad-leaved tree, that is, a tree that leaves leaves in spring and goes down in autumn, and has a hard and diverse color. Representatively, there are oak, birch, alder, walnut, and cherry trees.

Wood, a material made of wood, is being used for various purposes such as construction and furniture.

However, wood is a natural wood, and it is vulnerable to external moisture, so if the wood is not separately moisture-proof or waterproofed due to expansion and contraction, the wood will be distorted, mold, etc., causing corrosion.

In addition, warped or corroded wood has limitations in restoration to its original state depending on the size or type of wood used.

Therefore, as an invention for improving the problem of wood as described above, Registration Utility Model Publication No. 20-0272935 (hereinafter, Document 1) is a panel part manufactured by attaching multiple sheets of wooden boards in the width direction, and laminated under the panel part, It is an invention related to a'decorative solid wood panel' consisting of a laminated plywood layer.

In the case of a solid wood panel as in Document 1, a plywood layer is adhered to the lower part of the wood board to prevent the wood from being distorted by moisture, but a medium-density fiberboard (MDF, Medium Density Fiberboard) or Particle Board (PB) is used as a plywood layer, so there is a limit to moisture barrier.

Next, Registered Utility Model Publication No. 20-0251239 (hereinafter referred to as Document 2) is an invention related to “Laminated Flooring and Laminated Aggregate Plates Using Small-hard Materials” in which rings of solid wood are laminated and bonded in three or more layers to cross each other.

Document 2 The laminated board of the present invention uses a Korean pentagon bond MPU500 composed of polyvinyl acetate (PVAc, polyvinyl acetate) as the main component in order to laminate and bond three or more wooden boards, but polyvinyl acetate has excellent durability, There is a problem that water resistance or creep resistance is inferior.

The following is an invention for improving the problem of a plate composed of two or more layers of wood, and Korean Patent Publication No. 10-2012-0028896 (hereinafter, Document 3) discloses'bonding between two or more wood layers with a polyurethane adhesive. The present invention relates to'a composite material comprising two or more layers of wood arranged overlapping each other.

The composite material containing wood as in the document 3 invention uses a one-component polyurethane adhesive to prevent penetration into wood, but the one-component polyurethane adhesive quickly hardens when reacted by mixing additives, adjuvants and activators, thereby manufacturing composite materials. The operation can be cumbersome.

The following is an invention for improving the strength of wood, and Patent Publication No. 10-2014-0023000 (hereinafter, Document 4) describes a bamboo layer and a surface layer in which a metal or synthetic resin material is integrally bonded to the upper or lower surface of the bamboo layer. It is an invention related to a'composite panel using bamboo' consisting of.

Document 4 In the composite panel of the invention, bamboo is used to reduce the weight of the structure, but there is a problem that the bamboo is not easy to process because it is hollow.

<Background technical literature>

(Document 1) Registration Utility Model Publication No. 20-0272935

(Document 2) Registration Utility Model Publication No. 20-0251239

(Document 3) Unexamined Patent Publication No. 10-2012-0028896

(Document 4) Unexamined Patent Publication No. 10-2014-0023000

An object of the present invention is to solve the problems of the background art, and to provide a composite material using wood capable of controlling the degree of bending of wood by combining two or more composite layers according to the moisture absorption expansion and contraction of wood.

In addition, the present invention is to provide a wood composite material using the principle of natural evaporation of wood that can be applied to a variety of application fields.

As an example, the wood composite material of the present invention aims to be applicable to fire alarms, shade screens, humidifiers, and the like.

In order to achieve the above object, the composite material using wood of the present invention is applied with an adhesive 120 on one side of the wood 110 so that the non-expandable member 130 is bonded, and according to the absorption or evaporation of moisture or moisture. It is characterized in that the degree of bending of the wood 110 is controlled by the non-expandable member 130.

The wood 110 is characterized in that any one of a pine family, a cypress family, a larch tree, or a paulownia tree is used.

The adhesive 120 is a phenol resin adhesive, urea resin adhesive, melamine resin adhesive, epoxy resin adhesive, isocyanate resin adhesive or cyanoacryl It is characterized in that any one of cyanoacrylate resin adhesives is used.

The non-expandable member 130 is characterized in that any one of metal, synthetic resin, or carbon fiber reinforced plastic (CFRP) is used.

In order to achieve another object, the present invention is characterized in that a composite material using wood is included in the fire alarm.

In addition, the present invention is characterized in that a composite material using wood is included in the shade film.

In addition, the present invention is characterized in that the humidifier includes a composite material using wood.

The composite material using wood according to the present invention has an effect of controlling the degree of bending of wood by combining two or more composite layers according to the moisture absorption expansion and contraction of wood.

In particular, the present invention has an effect of preventing fire by applying it to a fire alarm using a wood composite material using the principle of natural evaporation of wood.

In addition, the present invention is applied to the shade film using a wood composite material, there is an effect that the wood composite material can be changed into a flat shape and an umbrella shape according to the outdoor moisture without the use of power to provide shade to the user.

In addition, the present invention is applied to a humidifier using a wood composite material, there is an effect that can solve the disadvantages of the ultrasonic or heated humidifier.

1 is a perspective view of a composite material using wood according to the present invention.
2 is a cross-sectional view of FIG. 1.
3 is a photograph of a composite material using wood according to the present invention.
4 is a photograph of a composite material using wood in a state in which moisture or moisture is absorbed and expanded.
5 is a front view of FIG. 4.
<Explanation of code>
100: wood composite material
110: wood, 120: adhesive,
130: non-expandable member

Hereinafter, the present invention will be described in detail through examples.

Objects, features, and advantages of the present invention will be easily understood through the following examples.

The present invention is not limited to the embodiments disclosed herein, and may be embodied in other forms. The embodiments disclosed herein are provided so that the spirit of the present invention can be sufficiently transmitted to those of ordinary skill in the technical field to which the present invention belongs, and all transformations included in the technical spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Therefore, the present invention should not be limited by the following embodiments, and it should be understood that all transformations included in the technical spirit and scope of the present invention are included. That is, those of ordinary skill in the technical field to which the present invention pertains, within the scope not departing from the spirit of the present invention described in the claims, variously modify or modify the present invention by adding, changing, deleting or adding constituent elements. It will be possible to change, and it will be said that this is also included within the scope of the present invention.

In the present invention, since various transformations can be applied and various embodiments can be applied, specific embodiments are illustrated in the drawings and described in detail. In the drawings, the size of the elements or the relative sizes between the elements may be somewhat exaggerated for a clear understanding of the present invention. In addition, the shape of the elements shown in the drawings may be slightly changed due to variations in the manufacturing process or the like.

Accordingly, the embodiments disclosed in the present specification should not be limited to the shapes shown in the drawings unless otherwise specified, and should be understood as including some degree of modification.

On the other hand, various embodiments of the present invention may be combined with any other embodiments unless clearly indicated to the contrary. Any feature indicated to be particularly desirable or advantageous may be combined with any other feature and features indicated to be desirable or advantageous. That is, various aspects, features, embodiments or implementations of the present invention may be used alone or in various combinations.

It should be understood that the terms used in the present specification are for describing specific embodiments, and are not intended to be limited by the claims, and all technical and scientific terms used in the present specification are general descriptions unless otherwise noted. It has the same meaning as commonly understood by someone with Singular expressions include plural expressions unless the context clearly indicates otherwise.

In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

<Example 1>

The composite material using wood may be referred to as a wood composite material 100 by including wood 110, an adhesive 120, and a non-expandable member 130 as shown in FIGS. 1 to 5.

The wood 110 may be any one of a pine family, a cypress family, a larch tree, and a paulownia tree, but is not limited thereto.

Here, the wood 110 may be used for various purposes, such as a fire alarm, a shade screen, a humidifier, etc. by using the principle that when it absorbs external moisture or moisture, it expands and bends.

In this case, the wood 110 may be formed in a polygonal cross-sectional shape, but the cross-sectional phenomenon of the wood 110 may be changed according to the intended use, and thus is not particularly limited thereto.

For example, when the cross-sectional shape of the wood 110 is formed in a square shape, it is easy to process, and products that can be utilized have various advantages.

In addition, when the wood 110 absorbs external moisture or moisture, it expands and can bend like a bow, and when it is dried, it can contract and become straight like a plank.

In the present invention, the wood 110 may be any one of a pine family, a cypress family, a larch tree, or a paulownia tree.

The pine family tree may include a coniferous pine tree, pine, spruce, fir, spheroid, and the like.

For example, pine is soft wood, which has the advantage of low shrinkage and expansion, high flexural strength, and withstands weight, and has excellent weather resistance and does not rot well.

For example, spruce is the lightest among conifers belonging to the pine family, but has an advantage of excellent strength and elastic modulus.

For example, fir is an evergreen coniferous arboreous tree belonging to the pine family, and has the advantage of being light, soft, excellent in material, and phytoncide.

For example, the bulbous tree is an evergreen coniferous arboreous tree belonging to the pine family, and has an advantage in that it has excellent processability and phytoncide is radiated.

The cypress family tree may include a coniferous tree, cypress, cypress, juniper, and Hwabaek.

For example, cypress is an evergreen tree belonging to the Cypressaceae family, and contains a lot of phytoncide, so it has high antibacterial and preservative functions, and has excellent durability and water resistance.

For example, the cypress is an evergreen arboreous tree belonging to the cypress family and has the advantage of radiating phytoncide.

For example, juniper is an evergreen arboreous tree belonging to the Cypressaceae family and has a unique scent, so it has the advantage of having sterilization and insecticidal effects.

For example, the Hwabaek is an evergreen coniferous tree belonging to the Cypressaceae family, and has an advantage in that its compressive strength is normal and phytoncide is released.

The larch family tree may include a coniferous tree, cedar, larch, metasequoia, and the like.

For example, cedar is an evergreen arboreous tree belonging to the Larch family, and has the advantage of being highly absorbent and resistant to moisture due to fast drying and phytoncide emission.

For example, Larch is a deciduous coniferous arboreous tree belonging to the Larch family, and has the advantage of being strong against moisture.

For example, metasequoia is a deciduous coniferous arboreous tree belonging to the Larch family, and has the advantage of being light and improving the texture and aesthetics.

The paulownia tree is a deciduous arboreous tree of the genus Tonghua plant, Hyeonsam family, and has strong advantages against moisture and insects.

Here, the used wood 110 is exposed to the outside and does not rot due to moisture when water flows or accumulates on the wood 110 due to rain, moisture, etc., or pine, cypress, cedar, or paulownia wood, which is a tree having water resistance. It is preferred that any one of them be used.

Most preferably, the wood 110 may be a cypress tree that satisfies both water resistance and deodorization to remove bad odors, antibacterial and insect repellent effects to kill insects and pathogens.

In particular, when the cypress tree is used as the wood 110, it is possible to give the user a feeling of being in the forest due to the direction as it radiates phytoncide. In addition, the wood composite material 100 using cypress wood may be referred to as a cypress wood composite material.

If the wood composite material 100 has a structure that can be replaced according to the used purpose, wood other than the wood type described above may be used.

In addition, since the wood 110 can be customized according to the object to be applied, the size, length, and thickness of the wood 110 are not limited.

Here, the wood 110 is preferably formed in a horizontal direction in order to expand and bend when absorbing moisture or moisture.

It is preferable to use the wood 110 in which moisture or moisture has been absorbed in accordance with the expansion and bending in the spring material located between the weight material and the weight material, so that the gap between the weight material and the weight material is wide.

The adhesive 120 may be applied to the lower end of the wood 110 and used to couple the wood 110 and the non-expandable member 130 to be described at the rear end.

Here, the adhesive 120 is a phenol resin adhesive, urea resin adhesive, melamine resin adhesive, epoxy resin adhesive, isocyanate resin adhesive or cyano Any one of an acrylate resin (cyanoacrylate resin) adhesive may be used, but is not limited thereto.

For example, a phenolic resin adhesive is an adhesive obtained by reacting phenol and formalin, and has excellent adhesive strength, heat resistance, and water resistance.

For example, urea resin adhesives are inexpensive and cure at room temperature, but may lack water resistance compared to other synthetic resin adhesives.

For example, the melamine resin adhesive has the advantage of having high water resistance, excellent heat stability, and not being colored by a transparent, white liquid adhesive.

For example, an epoxy resin adhesive is an adhesive made with an epoxy compound as a main material, and has excellent heat resistance, adhesiveness, waterproofness, and chemical resistance, and has the advantage of hardly shrinking during curing.

For example, the isocyanate-based resin adhesive has the advantage of having no formaldehyde emission, no contamination of wood, and high durability.

For example, a cyanoacrylate-based resin adhesive is an adhesive that is bonded by causing a polymerization reaction with moisture, and has an advantage of excellent initial adhesion expression.

In the present invention, even if the wood composite material 100 in which the wood 110 and the non-expandable member 130 are combined is exposed to moisture, rain, water, etc., the adhesion of the adhesive 120 decreases due to moisture, or the wood 110 and In order to prevent the non-expandable member 130 from being separated, it is preferable to use a phenolic resin adhesive, a melamine resin adhesive, or an epoxy resin adhesive having water resistance as the adhesive 120.

In particular, it is best to use an epoxy resin adhesive that satisfies water resistance and hardly shrinks when curing the adhesive 120.

The non-expandable member 130 may be coupled to the lower end of the wood 110 to which the adhesive 120 is applied.

In addition, the non-expandable member 130 does not expand due to moisture in order to improve the part of the elastic modulus according to the expansion or contraction of the wood according to the type of wood used for the natural wood 110 or the spacing between the weights. Any one of metal, synthetic resin, or carbon fiber reinforced plastic (CFRP) may be used.

Here, as the non-expandable member 130 is attached to the bottom of the wood 110, the degree of bending of the wood 110 that is expanded by absorbing moisture or moisture is adjusted to suit the applied product, or the wood composite is kept constant. The warpage of the material 100 can be leveled.

For example, the non-expandable member 130 using metal may be formed of a metal material such as aluminum, iron, or stainless steel in a shape such as a thin plate and attached to the lower end of the wood 110 using the adhesive 120.

For example, the non-expandable member 130 using synthetic resin is pure polystyrene resin (GPPS, general purpose polystyrene), high impact polystyrene (HIPS), ABS resin (acrylonitrile butadiene styrene), and polycaprolactone resin. (PCL, polycaprolactone), polylactic acid (PLA), acrylic resin, polypropylene resin (PP, polypropylene), or polybutylene terephthalate resin (PBT, polybutylene terephthalate) can be used. However, it is not limited thereto.

For example, pure polystyrene resin (GPPS) has the advantage of good molding processing and excellent transparency, water resistance, non-toxicity, and dimensional stability.

For example, impact-resistant polystyrene resin (HIPS) is a mixture of polystyrene and polybutadiene, and has a relatively stronger impact and abrasion than pure polystyrene resin (GPPS), so it has impact resistance, and has excellent water resistance, non-toxicity, molding processability, and dimensional stability. There is an advantage.

For example, ABS resin is a copolymer of acrylonitrile, butadiene and styrene, which can be manufactured by various processing methods such as injection, extrusion, and blow molding, has high impact resistance, excellent heat resistance, does not elute environmental hormones, and is washed with water. There is an advantage that can be used hygienically because this is possible.

For example, polycaprolactone resin (PCL) is a biodegradable plastic, and has a low melting point around 60° C., but has an advantage that environmental hormones do not elute.

For example, polylactic acid resin (PLA) is a biodegradable resin made of plants such as corn and sugarcane, and has an advantage of being harmless to a living body and excellent processability.

For example, acrylic resin is a colorless and highly transparent non-toxic plastic, which is easy to process and inexpensive, and has the advantage of being 6 to 17 times stronger than tempered glass.

For example, polypropylene resin (PP) has good transparency, tensile strength, heat resistance, and chemical resistance, is harmless to the human body, and has an excellent elastic modulus, so that it does not break even if it is bent.

For example, polybutylene terephthalate resin (PBT) has excellent strength and abrasion resistance.

For example, the non-expandable member 130 using carbon fiber reinforced plastic (CFRP) may be used in a plate-like shape.

The carbon fiber reinforced plastic (CFRP) has water resistance, is lighter than metal, and has excellent tensile strength and modulus of elasticity compared to metal.

In the present invention, ABS resin, polypropylene resin (PP) or carbon fiber reinforced plastic (CFRP) having water resistance and harmless to the human body, and elasticity according to expansion or contraction depending on whether the wood 110 absorbs moisture or moisture It is good that the used non-expandable member 130 is attached to the bottom of the wood 110.

Therefore, the wood composite material 100 in which the wood 110 and the non-expandable member 130 are combined with the adhesive 120 is equalized to the degree of bending of the wood 110 so that the wood 110 due to inhaling or discharging moisture or moisture. There is an advantage that the expansion and contraction are kept constant.

<Example 2>

The wood composite material 100 of Example 1 described above may be applied to a fire alarm.

Here, the wood composite material 100 may be disposed with a space in front of the button of the fire alarm.

In addition, in the wood composite material 100, the wood 110 may be disposed in front of the button of the fire alarm.

Known fire alarms may be used.

At this time, the wood composite material 100 disposed in front of the button of the fire alarm may inhale external moisture or moisture when no fire occurs, so that the wood 110 expands and maintains a bow-like state.

If a fire occurs, as a dry environment is created due to external heat, moisture or moisture absorbed by the wood 110 evaporates to the outside and the wood 110 contracts, thereby changing into a straight state.

The straight wood composite material 100 may sound a fire alarm sound by pressing a button of the fire alarm to notify that a fire has occurred in the building, and assist people to evacuate to the outside.

<Example 3>

The wood composite material 100 of Example 1 described above may be applied to the shade film.

The shade film may be disposed outdoors to block ultraviolet rays and rain to create shade.

Here, a roof of the shade film and a support rod capable of supporting the roof may be included.

The roof may be made of a wood composite material (100).

For example, the lower end of the support bar may be installed on the outdoor floor to fix the shade film, and the upper end of the support bar may be coupled to a roof made of a wood composite material (100).

The wood 110 of the wood composite material 100 may be disposed to be exposed to the outside, and the non-expandable member 130 may be disposed inside so as not to be exposed to the outside.

This is because the wood 110 is exposed to the outside and absorbs rain on a rainy day, so that a portion of the wood 110 is expanded, so that the wood composite material 100 may be bent in the shape of an umbrella.

That is, as the wood composite material 100 is bent, a space to avoid rain may be provided to the user.

On the contrary, on a day when it does not rain, the moisture absorbed by the wood 110 is evaporated to shrink the wood 110 portion, so that the wood composite material 100 is unfolded in a flat shape, thereby providing shade to the user.

Therefore, the shade film in which the wood composite material 100 is used can be referred to as an eco-friendly shade film.

<Example 4>

The wood composite material 100 of Example 1 described above may be applied to a humidifier.

In this case, a storage unit for receiving water for supplying moisture to the wood composite material 100 may be formed while accommodating the wood composite material 100.

The storage unit is formed as a cylinder or a polygonal column, and the upper part is open and the lower part is closed, so that a storage space for arranging the water and wood composite material 100 may be included.

That is, in the present invention, the humidifier including the wood composite material 100 may be referred to as a natural evaporation humidifier that supplies moisture to the surroundings by using the natural evaporation principle of the wood 110.

For example, when the wood composite material 100 is bent, it may mean that the interior is dry and the wood 110 is expanded by absorbing water stored in the storage unit, and moisture is being supplied to the interior.

For example, when the wood composite material 100 is straight, it may mean that the wood 110 is contracted and the interior is not dry or there is insufficient water in the storage unit.

By applying the moisture absorption expansion and contraction principle of the wood 110 as described above to the humidifier, it can be said to be an eco-friendly humidifier because it does not use power.

The present invention is a composite material using wood, which is an industrially applicable invention capable of controlling the degree of bending of the composite material due to the difference in the expansion rate of two or more composite layers according to the moisture absorption expansion and contraction of wood.

Claims (7)

The adhesive 120 is applied to one side of the wood 110 so that the non-expandable member 130 is combined,
The wood 110 is exposed to the outside and is not rotted by rain or moisture, and any one of pine, cypress, cedar, or paulownia wood is used,
In order to prevent the adhesive strength of the adhesive 120 from being lowered or the wood 110 and the non-expanding member 130 from being separated by moisture even when exposed to moisture, rain, or water, the adhesive 120 is made of a phenol resin. Any one of an adhesive, a melamine resin adhesive, or an epoxy resin adhesive is used,
By leveling the bending of the wood 110 by the non-expanding member 130 using any one of metal, synthetic resin or carbon fiber reinforced plastic (CFRP), the expansion and contraction of the wood 110 due to intake or discharge of moisture or moisture is prevented. A composite material using wood, characterized in that it is controlled to be kept constant. The method according to claim 1,
The wood 110 is a composite material using wood, characterized in that the grain of wood is formed in a horizontal direction to expand and bend when absorbing moisture or moisture. delete delete In the fire alarm containing the composite material using wood of claim 1,
In the case of a fire alarm containing a composite material using wood, a composite material using wood is placed in front of the button of the fire alarm, so that moisture or moisture absorbed by the wood 110 evaporates to the outside when a fire occurs, causing the wood 110 to shrink. A fire alarm containing a composite material using wood, characterized in that the fire alarm sounds by pressing the button of the fire alarm. In the shade film containing the composite material using wood of claim 1,
In the shade film containing composite material using wood, the lower part of the support bar is installed on the outdoor floor, and the upper part of the support bar is combined with a roof made of a composite material using wood.
The wood 110 of a composite material using wood is disposed to be exposed to the outside,
When the wood 110 absorbs rain and expands on a rainy day, the composite material using wood is bent in the shape of an umbrella to provide a space to avoid rain,
A shade film containing a composite material using wood, characterized in that the moisture of the wood 110 is evaporated and shrunk on a day when it does not rain, and the composite material using wood is unfolded in a flat shape to provide shade. In the humidifier containing the composite material using wood of claim 1,
In a humidifier containing a composite material using wood, when the composite material using wood is bent, the interior is dry and the wood 110 absorbing water from the storage unit expands to supply moisture to the room.
When the composite material using wood is straight, the wood 110 is contracted to indicate that the interior is not dry or that there is insufficient water in the storage unit,
A humidifier containing a composite material using wood, characterized in that to supply moisture to the surroundings using the principle of moisture absorption expansion and contraction of wood 110.

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