KR100979171B1 - Method of preparing a bamboo board and articles using the same - Google Patents

Abstract

The method for manufacturing a bamboo plywood according to the present invention comprises the steps of applying an adhesive to the first bamboo and the second bamboo, drying and heat treatment steps, alternately laminating the first bamboo between the second bamboo; And heat compressing.

The bamboo plywood produced by the present invention is lighter than wood plywood or synthetic resin plywood, durable and provides a bamboo plywood having a characteristic that is not easily deformed even by impact, in particular unlike ordinary bamboo.

Bamboo, plywood, panel, heat treatment, glue

Description

Method of preparing a bamboo plywood and products using the same {Method of preparing a bamboo board and articles using the same}

The present invention relates to a method for manufacturing a bamboo plywood and a panel using the same, and more particularly to a method for manufacturing a bamboo plywood using a bamboo having excellent strength and elasticity as a material of the plywood and a panel using the same.

In general, the growth rate of bamboo is very fast, unlike the general timber, the growth period required to achieve the strength required for use as building timber is very fast, within three years. In addition, it is excellent in firmness, elasticity and strength, and abundant supply due to rapid cultivation, so it is inexpensive and can delay the natural destruction by general deforestation.

However, due to the nature of the bamboo material, the surface strength is weak, so weak to the imprinting and impact, there is a disadvantage that there is a lifting phenomenon and a distorting phenomenon when used as a flooring agent.

On the other hand, there are various types of existing formwork and building panels such as plate, synthetic resin panel, or metal plate made of iron and aluminum materials, which are made by crushing ancient plywood and waste materials, mixing them with resin, and extruding or injecting them. There is a drawback that the resin on the surface is easily peeled off or torn when received or scratched, and when used as a formwork, there is a problem in that it should be disposed of when used 4 to 5 times because the resistance to the toxicity of the concrete is weak.

On the other hand, there is disclosed a panel in which bamboo is inserted into the synthetic resin panel, the surface cracking may occur when nailing like a conventional synthetic resin panel.

The present invention is to solve the conventional problems, one object of the present invention is to provide a method of producing a bamboo plywood having a light and excellent strength.

Still another object of the present invention is to provide a bamboo plywood and a method for manufacturing the same, which can prevent deformation due to external impact.

One aspect of the present invention comprises the steps of: (1) applying an adhesive to the first bamboo and the bamboo weaving alternately weave the first bamboo and the bamboo thin plate by cutting the bamboo into a thin plate;

(2) drying the first bamboo and the second bamboo to which the adhesive is applied and then heat-treating;

(3) repeatedly laminating the first bamboos on the second bamboo so as to be perpendicular to each other or repeatedly laminating in the same direction to form a first bamboo layer and laminating a second bamboo on the first bamboo layer; And

(4) A method for producing a bamboo plywood comprising the step of heating and compressing a first bamboo layer and a second bamboo formed in step (3).

Another aspect of the invention relates to a product using the bamboo plywood produced by the method.

Bamboo plywood produced by the present invention, unlike plywood using a wood plywood or synthetic resin, is light, durable, and has a characteristic that is not easily deformed by impact, in particular unlike ordinary bamboo.

The bamboo plywood produced by the method of the present invention is a bamboo plywood comprising the first bamboo and the second bamboo bamboo weave alternately weaving the bamboo thin plate by cutting the bamboo into a thin plate, the second bamboo The first bamboo layers are alternately repeatedly stacked so as to be perpendicular to each other, or repeatedly stacked in the same direction to form a first bamboo layer, and second bamboo is stacked on the first bamboo layers.

In general, the plywood refers to the thin cut out of the solid wood and laminated so that the fiber direction is perpendicular to each other, but the bamboo plywood used in the present invention is used as a term meaning a bamboo board manufactured using the first bamboo and the second bamboo. .

Hereinafter, a method of manufacturing the bamboo plywood will be described in more detail with reference to the drawings.

The method for producing a bamboo plywood according to the present invention comprises the steps of: (1) applying an adhesive to a first bamboo and a second bamboo bamboo weave alternately between the first bamboo and the bamboo thin plate by cutting the bamboo into a thin plate;

(2) drying the first bamboo and the second bamboo to which the adhesive is applied and then heat-treating;

(3) repeatedly stacking the first bamboos on the second bamboo so as to be perpendicular to each other or repeatedly stacking in the same direction to form a first bamboo layer and stacking the second bamboo on the first bamboo layer; And

(4) thermally compressing the first bamboo layer and the second bamboo formed in step (3).

Each of these steps will be described in detail below.

Applying an adhesive to the first bamboo and the second bamboo

FIG. 1 is a schematic view of a first bamboo plywood, and FIG. 2 is a schematic view of a first bamboo layer in which first bamboos are alternately stacked in a vertical and horizontal direction.

Referring to Figure 1, the first bamboo (1) is that bamboo is cut into thin plates connected to date. The first bamboo is a thin thin bamboo in the longitudinal direction connected side by side and can be connected by several threads or strings along the length, there is no particular limitation on the material and diameter of the thread or string, but thin and hard to break That is, it is preferable that it is excellent in tensile strength, for example, not only nylon, polyester, silk but a wire etc. can also be used.

Referring to Figure 2, the strength of the plywood is improved as the first bamboo is stacked vertically cross. There is no particular limitation on the thickness and the number of repetitions of the first bamboo layer, but may vary depending on the thickness or use of the final plywood.

3 and 4 are schematic views showing the second bamboos 2 in which the bamboo sheets are plain weave alternately. Referring to FIGS. 3 and 4, the second bamboo 2 is a plain weave of the bamboo sheets alternately, and may use the second bamboo woven in various ways.

The step is a step of applying an adhesive to the first bamboo and the second large wood made by thinly turning the bamboo in the longitudinal direction.

In the above step, the bamboo may be dried first, and then the first bamboo and the second bamboo may be manufactured, and the first bamboo and the second bamboo may be made first, followed by drying the bamboo.

The method of drying the bamboo, the first bamboo and the second bamboo is not particularly limited. For example, the bamboo may be put in a dryer to remove moisture.

The step of applying the adhesive is to apply the adhesive to the dried bamboos, the bamboo can be put in an adhesive kiln, the adhesive is applied to the bamboo or spray can be applied using an adhesive, but there is no particular limitation.

As the adhesive, a well-known plywood adhesive may be used, and preferably 5 to 50 wt% of phenols, 30 to 80 wt% of formaldehyde, 0.1 to 10 wt% of sodium hydroxide, 0.1 to 10 wt% of potassium sulfate, and water 5 To 50% by weight.

More preferably, the content of the phenols is 15 to 30% by weight, formaldehyde 40 to 60% by weight, sodium hydroxide 0.5 to 3% by weight, potassium sulfate 0.5 to 3% by weight, and water 10 to 35% by weight.

The adhesive may further comprise 0.1 to 5% by weight, preferably 0.1 to 3% by weight of the aqueous black dye.

As the phenols, phenol, cresol, phenol (eg, t-butyl phenol) in which an alkyl group having 1 to 4 carbon atoms is substituted with hydrogen can be used.

As the aqueous black dye, an aqueous black dye which is usually sold may be used.

The adhesive may vary in content depending on weather and working environment.

Drying and heat treatment steps

The step is a step of drying the first bamboo and the second bamboo to which the adhesive is applied and then heat-treating it.

The drying may be dried in the same manner as the adhesive application step mentioned above. The drying is for removing moisture generated when the adhesive is applied.

The heat treatment step may be heat-treated by maintaining the first and second bamboo in boiling water for 1 minute to 7 days, preferably 10 minutes to 24 hours. By the heat treatment, the bamboo can be softened, and sterilization can also be performed.

In addition, insecticides can be added to the insecticides in water, and there is no particular restriction on insecticides, but it is better to use pesticides and fumigants that penetrate. Pesticides such as parathion, smitzion, diaton, gadona, and levitate may be used as pesticides, and fumigants may be carbon wed, methylbromide, or epihomes.

Lamination steps

The step may be performed by alternately repeatedly stacking the first bamboos on the second bamboo to be perpendicular to each other or repeatedly stacked in the same direction to form a first bamboo layer and stacking the second bamboo on the first bamboo layer. to be.

The first bamboos may be alternately stacked vertically or stacked in the same direction.

Figure 5 is a front view of the bamboo plywood produced by one embodiment of the present invention. Referring to FIG. 5, the first bamboos 10 are alternately repeatedly stacked vertically on the second bamboo 20. As shown in FIG. 2, the first bamboos are alternately stacked vertically to form a first bamboo layer. After forming the first bamboo layer, a second bamboo layer is laminated.

Before or after the heat compression step, the front and rear both sides of the bamboo plywood can be treated with the finishing material 30. The finish 30 may be laminated so as to be positioned at the lowermost and uppermost portions in the lamination step.

Figure 6 is a bamboo plywood produced by one embodiment of the present invention, the finish 30 is further processed. The finishing material is located at the top and bottom of the bamboo plywood to function as the top and bottom of the bamboo plywood. As the finishing material, at least one synthetic resin film selected from a waterproof film, various wood chips, polyvinyl chloride, polyethylene, polypropylene, olefin, and rubber may be used. Furthermore, one or more selected from bamboo veneer, solid wood, plywood, veneer, particleboard, medium density fiberboard (MDF), high density fiberboard (HDF), and oriented strand board (OSB) can be used as finishing materials.

7 is a front view of a bamboo plywood to which a mixed wood board is added. The laminating step may further insert a mixed wood plate 40 between the second bamboo (20). The scrubber may also be added between the first bamboo layers.

The hybrid board 40 is made by cutting the wood for plywood. There is no particular limitation on the lumber, and examples thereof include pine, larch, cedar, birch, boxwood, willow, and pearwood.

As the bamboo plywood according to the invention includes the hybrid board 40, the crack, elasticity, and strength of the bamboo may be compensated for.

Heat compression stage

The step is a step of heat-compressing the first bamboo layer and the second bamboo formed in step (3). After heating and compressing the above step, the top and bottom may be treated with a finish.

The heat compression step may be heat compression of the bamboo plywood for 1 minute to 3 days at a pressure of 100 to 200 ℃, 0.1 to 2000 tons. Preferably it is pressurized for 10 minutes to 2 hours at a pressure of 120 to 160 ℃, 100 to 1200 tons. The temperature, pressure and time may vary depending on the thickness of the bamboo plywood and the materials used and other uses.

Adhesion and sterilization may be performed by the heat compression, and the thickness of the bamboo plywood may be adjusted.

There is no limitation on the thickness of the bamboo plywood, but it is preferably in the range of 5mm to 30mm to match the main production thickness of the plywood.

In another aspect the present invention includes a bamboo plywood produced by the method. Referring to FIG. 5, the bamboo plywood is a bamboo plywood including a first bamboo 10 which cuts bamboo into thin plates and connects them to a date, and a second bamboo 20 that weaves plain weaves alternately. The first bamboo layer is alternately repeatedly stacked in the vertical and horizontal directions on the second bamboo, and the second bamboo is formed on the first bamboo layer.

The bamboo plywood produced by the present invention can be used for panels. As the bamboo plywood can be applied, as well as the formwork panels, interior and exterior, floorboards, various furniture, flooring, wall materials, ceiling materials, kitchen materials, sinks, dining tables, tables, desks, chairs, shoe racks, sofas Can be used for benches, doghouses, beds, doors, jars, various interiors, props necessary for life, but is not necessarily limited thereto.

The present invention is described in more detail with reference to the following examples, which do not limit the scope of the present invention.

Example  One

Three-year-old bamboo was thinly sliced, lined up side by side and woven with nylon strings to make the first bamboo, and then the split bamboo was zigzag-like to form a second bamboo. The first bamboo and the second bamboo were then dried. Subsequently, bamboo was applied to an adhesive kiln in which 24 wt% of phenol, 52 wt% of formaldehyde, 1 wt% of sodium hydroxide, 1 wt% of potassium sulfate, and 22 wt% of water were mixed. The first and second bamboos to which the adhesive was applied were dried again, and then boiled in boiling water for about 1 hour, heat-treated, and dried.

Subsequently, the veneer and the second bamboo were laid and repeatedly laminated about three times so as to vertically cross the first bamboo. Finally, the veneer was placed on top. The laminated bamboo plywood was heat-compressed for 30 minutes at a pressure of 140 ° C. and 900 tons with a steam thermal compression device to finally prepare a bamboo plywood having a thickness of 10 mm.

1 is a schematic view of a first bamboo plywood;

2 is a schematic diagram of a first bamboo layer in which first bamboos are alternately repeatedly stacked in the vertical and horizontal directions.

3 is a schematic view of a second bamboo plywood;

4 is a schematic diagram of another form of a second bamboo plywood;

5 is a front view of a bamboo plywood according to an embodiment of the present invention.

FIG. 6 is a front view of the bamboo plywood to which the finishing material is added in FIG. 5.

FIG. 7 is a front view of the bamboo plywood to which the hybrid board is added in FIG. 6.

* Description of the main parts of the drawings

10. The First Bamboo 20. The Second Bamboo

30. Finish 40, lumber board

Claims (8)

(1) applying an adhesive to the first bamboo and the second bamboo bamboo weave alternately plain bamboo weave the first bamboo and the bamboo thin plate by cutting the bamboo into a thin plate; (2) drying the first bamboo and the second bamboo to which the adhesive is applied and then heat-treating; (3) repeatedly laminating the first bamboos on the second bamboo so as to be perpendicular to each other or repeatedly laminating in the same direction to form a first bamboo layer and laminating a second bamboo on the first bamboo layer; And (4) The method of manufacturing a bamboo plywood comprising the step of heat-compressing the first bamboo layer and the second bamboo formed in step (3), wherein the adhesive is 5 to 50% by weight of phenols Formaldehyde 30 to 80% by weight Sodium hydroxide 0.1-10 wt% 0.1 to 10% by weight potassium sulfate and Process for producing a bamboo plywood comprising 5 to 50% by weight of water. The method of manufacturing a bamboo plywood according to claim 1, wherein both sides of the bamboo plywood are treated with a finishing material before or after the heat compression step (4). The method of claim 1, wherein the laminating step (3) further comprises inserting a mixed wood board between the second bamboos. delete The method of claim 1, wherein the adhesive further comprises 0.1 to 5% by weight of an aqueous black dye. The method of claim 1, wherein in the heat treatment step (2), the first and second bamboos are kept in boiling water for 10 minutes to 24 hours for heat treatment. The method of claim 1, wherein the (4) heat compression step is a method of producing a bamboo plywood, characterized in that the compression of the bamboo plywood for 10 minutes to 4 hours at a pressure of 100 to 200 ℃, 0.1 to 2000 tons. A bamboo plywood product manufactured by the method of any one of claims 1 to 3 and 5 to 7, wherein the product is a building panel, an interior exterior article, floorboard, furniture, flooring, wall material, ceiling material Bamboo plywood products selected from the group consisting of kitchen utensils, sinks, dining tables, tables, desks, chairs, shoe racks, sofas, benches, doghouses, beds, doors, jars, interior products and household items .

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