KR20240121358A - High-strength bamboo flooring with excellent impact resistance and its manufacturing method - Google Patents

Abstract

The present invention relates to a high-strength bamboo flooring material and its agent, which improves surface strength and impact resistance by compressing bamboo pieces.
It's about the method of control.
The present invention compresses bamboo to a certain thickness ratio under high temperature and high pressure conditions using a press to increase the density of the bamboo.
By increasing the crystallization area within the bamboo tissue, excellent surface strength and impact resistance can be secured.
By increasing the area of the bamboo, deformation of the bamboo due to moisture and heat is suppressed, thereby improving dimensional stability.
It has the advantage of being able to secure stability. In addition, it has the advantage of reducing harmful substances such as oil, which is generated after the bamboo pieces are glued together.
The eco-friendly natural bamboo flooring is made by naturally removing the formaldehyde during the press process.
It is possible to manufacture, and it has the important advantage of ensuring mass production and productivity by manufacturing using a multi-stage press.
Have.

Description

{High-strength bamboo flooring with excellent impact resistance and its manufacturing method}

The present invention relates to bamboo flooring, and more specifically, to a method of compacting bamboo using a multi-stage press.

A high-strength bamboo flooring material with improved surface strength and impact resistance and a method for manufacturing the same using a low-cost, simple process

It's about.

Flooring materials manufactured using conventional bamboo raw materials and patterned wood have insufficient surface strength due to the characteristics of natural bamboo material.

It is vulnerable to scratches and impacts, and when used as flooring, it is exposed to the heat and moisture of the floor, so it may be exposed to the floor during construction.

The center of the flooring material may be lifted (crooking) or the edge may be lifted (cupping), and in severe cases

In some cases, it has the disadvantage of being difficult to use as flooring material because it exhibits a twisting phenomenon.

As a conventional technology using bamboo, Korean Patent Publication No. 1996-7119 discloses processing of bamboo veneer.

Bamboo plywood and its manufacturing method manufactured by coating with resin after drying, laminating at right angles, and then heat-compressing

The law has been disclosed, and in Korean Patent Publication No. 1997-549, a single plate made of a flat-shaped die and a material is disclosed.

Or, structural laminated board using bamboo, characterized by alternating multiple layers of structural plywood and bonding them together

The patents disclose a method for manufacturing laminated wood, but not a method for increasing surface strength.

It relates to an invention for manufacturing, wherein the use of the press is not for compaction but for bonding.

As a compression processing method for general wood, Korean Patent Publication No. 2001-81137 describes a method of first compressing wood in a compression molding machine.

A method for compressing dry wood by repeating heating and compression in a high-frequency radio wave environment is disclosed.

In Patent Publication No. 2003-20751, the moisture content state is controlled through humidity control to the fiber saturation point (28 to

A plastic-processed wood and a manufacturing method thereof are disclosed, which are manufactured by thermally compressing wood through a thermo-hydraulic press after reaching a temperature of 30%).

Oh, there it is.

However, the method of using the above heat pressure and high frequency method alternately for compaction requires 70 minutes at high temperature in the first and second stages.

The wood is prone to thermal deformation due to the above exposure, and productivity is also reduced. The above pretreatment is used to control moisture and fiber

The method of raising the function ratio to the saturation point and then applying heat and pressure has a long heat and pressure operation time and also requires steam to be supplied from the outside.

It becomes a very complex process because it has to be done quickly.

Therefore, the existing compaction method increases costs and processes in terms of mass production and productivity of product manufacturing for commercialization.

And thermal deformation of wood inevitably occurs. In addition, since general wood is used as a compression material, the compression rate is low and the temperature is

Therefore, the effect of increasing surface strength is also low.

Republic of Korea Publication Patent No. KR 2003-20751

The inventors of the present invention used a multi-stage press to use bamboo as a flooring material rather than as a structural laminated lumber.

By attempting to compact using high-strength bamboo veneer, it was confirmed that cost reduction and process shortening are possible.

Multiple lamination of other wood materials such as plywood, fiberboard (HDF, MDF), particleboard and other heterocomposite materials on the back

Thus, the present invention was completed by manufacturing bamboo flooring.

The present invention can control the compaction rate up to 50% by applying bamboo, a woody plant of the gramineae family, and can be applied to a multi-stage press.

Bamboo with excellent surface strength achieved by compaction in one process without pretreatment using

The purpose is to provide flooring materials through a low-cost, simple process.

Manufacturing using the multi-stage press presented in the present invention can improve mass production and productivity through cost reduction and process shortening.

It is possible to produce high-strength bamboo flooring that can be commercialized. In addition, by compressing the bamboo, the surface strength is increased.

Improved strength and impact resistance, and increased the crystallization area within the bamboo tissue, thereby reducing the damage to bamboo caused by moisture and heat.

It has the advantage of ensuring dimensional stability by suppressing deformation. In addition, it has the advantage of ensuring dimensional stability by bonding bamboo pieces to each other.

Formaldehyde, a harmful substance that occurs after the process, is naturally removed during the press process, making it environmentally friendly.

It is possible to manufacture natural bamboo flooring.

Figure 1 is a density profile of a compacted bamboo veneer according to the present invention.
Figure 2 is a cross-sectional view of a compacted bamboo veneer according to the present invention.
Figure 3 is a cross-sectional view of bamboo flooring according to the first embodiment of the present invention.
Figure 4 is a cross-sectional view of bamboo flooring according to the second embodiment of the present invention.
Figure 5 is a cross-sectional view of bamboo flooring according to a third embodiment of the present invention.
Figure 6 is a cross-sectional view of bamboo flooring according to the fourth embodiment of the present invention.
Figure 7 is a cross-sectional view of bamboo flooring according to the fifth embodiment of the present invention.
Figure 8 is a cross-sectional view of bamboo flooring according to the sixth embodiment of the present invention.

In order to achieve the above purpose, the present invention is a multi-layer flooring material that is compacted using a multi-stage press.

We provide high strength bamboo flooring containing one or more layers of bamboo veneer.

It is preferable that the compaction rate of the above bamboo veneer be 35 to 50% of the density before and after compaction.

The bamboo flooring of the present invention comprises at least one bamboo veneer, a wood material layer, a synthetic resin layer, and a surface coating layer.

It may additionally include one or more floors selected from among them.

The wood materials that make up the above wood material layer are bamboo veneer, raw wood, plywood, veneer, particle board, and MDF (Medium Density Fiberboard).

One type selected from Fiberboard, HDF (High Density Fiberboard), and OSB (Oriented Strand Board)

That's it.

The above synthetic resin layer is selected from polyvinyl chloride, polyethylene, polypropylene, olefin, and rubber as a base resin.

It is a layer containing one or more types of charcoal, yellow clay, silver, quartz, germanium, magnetite, jade, etc. to provide functionality.

It may contain one or more functional substances selected from antibacterial agents and insect repellents.

The above compressed bamboo veneer is coated with epoxy, phenol, acrylic, melamine, and polyurethane to further enhance surface strength.

It can be impregnated with one or more types of curable resin selected from carbon, unsaturated polyester, and diallyl phthalate.

In addition, the present invention uses a hot press to heat-laminated bamboo pieces horizontally or vertically and then fits them to a certain area.

Step of manufacturing bamboo veneer by cutting the length and width of the bamboo veneer; 2 times of manufacturing the bamboo veneer in one stage of a multi-stage press

Step of compacting bamboo veneer by stacking 6 sheets of paper and then performing hot and cold pressing; at least one compacted bamboo sheet

A step of laminating one or more layers selected from a wood veneer, a wood material layer, and a synthetic resin layer; forming a surface coating layer.

A method for manufacturing high-strength bamboo flooring comprising the steps of:

In the manufacturing step of the above bamboo veneer, the bamboo pieces are pressed horizontally or vertically at a pressure of 5 to 15 kg/cm2 using a hot press.

After heat-laminated at a temperature of 100 to 140℃ for 60 to 180 seconds under pressure, it is cut to a length of 600 to 1,200 to fit a certain area.

Bamboo veneer is manufactured by cutting it into pieces with a width of 600 to 1,200 mm and a thickness of 1 to 4 mm.

In the above step of compacting the bamboo veneer, the manufactured bamboo veneer is laminated in a multi-stage press with 2 to 6 sheets per stage.

After that, heat pressurization at a temperature of 100 to 140℃ for 400 to 1,200 seconds at a pressure of 30 to 90 kg/cm2 for 100 to 500 seconds.

Cold pressing is used to compact the bamboo veneer.

The compaction conditions are to have a compaction rate of 35%, but not cause significant color changes such as carbonization of the bamboo.

In addition, since the overall thickness uniformity must be secured, compaction is performed under the above optimal conditions.

The present invention improves surface strength and impact resistance by compacting bamboo using a multi-stage press, and

By increasing the crystallization area within the structure, deformation of bamboo due to moisture and heat is suppressed, thereby ensuring dimensional stability.

It has the advantage of being able to protect the environment. In addition, formaldehyde, a harmful substance that is generated after bamboo pieces are glued together, is not produced.

It is possible to manufacture eco-friendly natural bamboo flooring by naturally removing the waste during heat pressing through the rest, and multi-stage

It has the important advantage of ensuring mass production and productivity by manufacturing using a press.

The present invention is specifically described below with reference to the attached drawings and examples.

Figure 1 is a density profile of a compacted bamboo veneer according to the present invention, in which the density of the bamboo veneer is increased by compaction.

It can be confirmed that the strength has increased nearly two-fold, and the impact resistance has increased nearly three-fold.

At this time, the surface strength of the bamboo flooring was measured by cutting a specimen of a certain size at room temperature according to the conventional surface strength measurement method.

Then, for the impact resistance, a 228 g weight was used to drop the sample freely in 10 cm increments and the presence or absence of surface damage was visually checked.

It was determined and measured.

The compressed bamboo should have an impact strength of about 80 cm, which is the height at which objects can be dropped in everyday life.

At this time, the compression ratio should be about 35% to satisfy the physical properties. As can be seen in Figure 1,

The bamboo flooring of the present invention satisfies these requirements.

Figure 2 is a cross-sectional view of a compacted bamboo veneer according to the present invention, in which bamboo pieces (11) are compressed by a hot press.

It is made of bamboo veneer (10) by laminating it flat. Also, bamboo pieces (11) are laminated vertically to make a bamboo board.

It is also possible to construct a no-fault board (10).

Figure 3 is a cross-sectional view of a bamboo flooring material according to the first embodiment of the present invention, wherein the bamboo flooring material is viewed from above as a surface view.

It consists of a long layer (1), a compressed bamboo veneer (10), and a wood material layer (20). The wood material layer (20) is used.

Wood materials include raw wood, plywood, veneer, particleboard, MDF, HDF, and OSB.

Figure 4 is a cross-sectional view of a bamboo flooring material according to a second embodiment of the present invention, wherein the bamboo flooring material is viewed from above as a surface view.

It consists of a long layer (1), a compressed bamboo veneer (10), a wood material layer (20), and a synthetic resin layer (30).

The above synthetic resin layer (30) uses a base resin such as polyvinyl chloride, polyethylene, polypropylene, olefin, or rubber.

It is a layer composed of plasticizers, fillers, and other additives, and has far-infrared radiation effects and harmful substance removal effects.

In order to provide functional effects such as sterilization, antibacterial, and insect repellent effects, charcoal, yellow clay, silver, quartz, germanium, and magnetite are used.

You may also add jade, antibacterial agents, and insect repellents.

Figure 5 is a cross-sectional view of a bamboo flooring material according to a third embodiment of the present invention, wherein the bamboo flooring material is viewed from above as a surface view.

It consists of a long layer (1), two compressed bamboo veneers (10), and a wood material layer (20).

Figure 6 is a cross-sectional view of a bamboo flooring material according to the fourth embodiment of the present invention, wherein the bamboo flooring material is viewed from above in a surface view.

It consists of a long layer (1), a compressed bamboo veneer (10), a wood material layer (20), and a compressed bamboo veneer (10).

Figure 7 is a cross-sectional view of a bamboo flooring material according to the fifth embodiment of the present invention, wherein the bamboo flooring material is viewed from above as a surface view.

It consists only of a long layer (1) and three compressed bamboo veneers (10).

Figure 8 is a cross-sectional view of a bamboo flooring material according to the sixth embodiment of the present invention, wherein the bamboo flooring material is viewed from above in a surface view.

It consists of a long layer (1), a compressed bamboo veneer (10), a synthetic resin layer (30), and a wood material layer (20).

[Example 1]

Process 1: Manufacturing process of bamboo veneer using a hot press

Bamboo pieces were pressed horizontally or vertically with a hot press at a temperature of 120℃ and a pressure of 10 kg/cm2 for 120 seconds.

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

-3-[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

80 cm

40 cm

Publication patent 10-2006-0075112

Afterwards, bamboo veneer with a thickness of 2.2 mm was manufactured by cutting it to a length of 910 mm and a width of 910 mm to fit a certain area.

Step 2: Compaction process of bamboo veneer using a multi-stage press

The manufactured bamboo veneer is laminated in a multi-stage press, 2 to 6 sheets per stage, and then pressed at a temperature of 110℃ under a pressure of 60 kg/cm2.

The bamboo veneer was compacted by hot pressing for 800 seconds and then cold pressing for 300 seconds, and then separated in a multi-stage press.

Step 3: Multiple lamination process of compressed bamboo veneer and other heterocomposite materials

Plywood (20) was laminated sequentially with an adhesive as a layer of compressed bamboo veneer (10) and wood material (20) from above.

Step 4: Cutting and Surface Painting Process

After the surface of the compressed bamboo veneer (10) is treated with a UV-curing type treatment agent for the first and second coats, it is processed to a certain standard.

By cutting it into square pieces, processing grooves and protrusions, and then coating it with a top surface coating layer, the bamboo floor as shown in Fig. 3 is created.

Ashes were manufactured.

[Example 2]

In the third process of the above Example 1, the compressed bamboo veneer (10), plywood (20), and synthetic resin layer (30) are sequentially placed from above.

Bamboo flooring as shown in Fig. 4 was manufactured by laminating with adhesive.

Table 1 shows the bamboo veneer manufactured according to the above example and, as a comparative example, the bamboo veneer manufactured by conventional compression processing.

By comparing the physical properties, it can be seen that the compaction rate, surface strength, dimensional stability, and processing cost of the example are superior to those of the comparative example.

1: Surface coating layer
10: Compressed Bamboo Veneer
11: Bamboo sticks
20: Wood material layer
30: Synthetic resin layer

Claims (6)

In multi-layer flooring, high strength bamboo veneer that is compressed using a multi-stage press is included in one or more layers.
Bamboo flooring. In the first paragraph, the compaction rate of the bamboo veneer is characterized by being 35 to 50% of the density before and after compaction.
is a high-strength bamboo flooring. In the first paragraph, a high-strength material layer further comprising at least one layer selected from a wood material layer, a synthetic resin layer, and a surface coating layer.
Also bamboo flooring. In the third paragraph, the wood material is bamboo veneer, raw wood, plywood, veneer, particle board, MDF (Medium Density Fiberboard)
At least one type selected from among Fiberboard, HDF (High Density Fiberboard), and OSB (Oriented Strand Board).
High-strength bamboo flooring featuring: In the third paragraph, the synthetic resin layer is a base resin made of polyvinyl chloride, polyethylene, polypropylene, olefin, or
A high-strength bamboo flooring comprising at least one selected from the group consisting of: In the fifth paragraph, the synthetic resin layer is selected from among charcoal, yellow clay, silver, quartz, germanium, magnetite, jade, antibacterial agent, and insect repellent.
A high-strength bamboo flooring comprising one or more selected functional materials.