KR100711497B1 - High impact resistant bamboo flooring and producing method thereof - Google Patents

Abstract

The present invention relates to a high-strength bamboo flooring and condensation of bamboo bamboo pieces to improve the surface strength and impact resistance.

The present invention can secure excellent surface strength and impact resistance by increasing the density of the bamboo by compressing the bamboo to a certain thickness ratio under the conditions of high temperature and high pressure by using a press, and by increasing the crystallization region in the bamboo tissue and moisture and By suppressing the deformation of the bamboo due to heat has the advantage of ensuring the dimensional stability (Dimensional stability). In addition, it is possible to manufacture environmentally friendly natural bamboo flooring material by removing the glass formaldehyde, which is a harmful substance generated after adhering bamboo bamboo pieces to each other, during the pressurization through the press, and by using a multi-stage press to ensure mass production and productivity. Has an important advantage.

Bamboo, Flooring, Consolidation, Surface Strength, Impact Resistance, Dimensional Stability

Description

High impact resistant bamboo flooring and producing method

1 is a density profile of a bamboo veneer compacted according to the present invention.

2 is a cross-sectional view of the bamboo veneer compacted according to the present invention.

3 is a cross-sectional view of the bamboo flooring according to the first embodiment of the present invention.

4 is a cross-sectional view of the bamboo flooring according to the second embodiment of the present invention.

5 is a cross-sectional view of the bamboo flooring according to the third embodiment of the present invention.

6 is a cross-sectional view of the bamboo flooring according to the fourth embodiment of the present invention.

7 is a cross-sectional view of the bamboo flooring according to the fifth embodiment of the present invention.

8 is a cross-sectional view of the bamboo flooring according to the sixth embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: surface coating layer

10: consolidated bamboo veneer

11: bamboo bamboo

20: wood material layer

30: synthetic resin layer

The present invention relates to a bamboo flooring, and more particularly, to a high-strength bamboo flooring that improves the surface strength and impact resistance by compacting bamboo using a multi-stage press and a method for producing the same by a low cost simple process.

The flooring manufactured using conventional bamboo raw materials and veneers is weak in the nature of the nature of the bamboo material due to its lack of surface strength, so it is not easy to be picked up and impacted.When used as a flooring material, it is exposed to the heat and moisture of the floor. Crooking, the edge of the supply (Cupping) appears, and in severe cases the twist (twist) appears, there is a disadvantage that is difficult to use for flooring applications.

As a conventional technology using bamboo, Korean Patent Laid-Open Publication No. 1996-7119 discloses a bamboo plywood manufactured by processing a bamboo veneer, dried with a resin, laminated at right angles, and thermally compressed, and a method of manufacturing the same. Korean Patent Laid-Open Publication No. 1997-549 discloses a structural aggregate material using a bamboo material, and a method of manufacturing the same, characterized in that the laminate is formed by laminating a plurality of alternating plates or structural plywood made of flat porridge and material. Is disclosed. However, the above patents relate to the invention of manufacturing the aggregate material, not the method of increasing the surface strength, wherein the use of the press is not in compaction but in the adhesive bonding.

As a compression processing method of general wood, Korean Patent Laid-Open Publication No. 2001-81137 discloses a dry wood compression processing method that repeats heating and compression in a high-frequency wave field environment after first compression in a compression molding machine. 2003-20751 discloses a plastic processed wood and a method for producing the same, which are manufactured by thermally compressing a water content state by reaching a fiber saturation point (28 to 30%) through humidity control and then heat-hydraulic. .

However, the method of cross-using the thermal pressure and the high frequency method for consolidation is exposed to the high temperature for more than 70 minutes over the first and second stages, so that the wood is easily deformed and the productivity is low. Humidification by the pre-treatment to increase the water content to the fiber saturation point, and then the thermo-pressure method is a very complex process because the thermoelectric pre-working time is long and must supply steam from the outside.

Therefore, in the existing compaction method, cost increase, process increase, and thermal deformation of wood are indispensable in mass production and productivity of product manufacturing for commercialization. In addition, general wood is used as the material for compaction, so the compaction rate is low, and thus the effect of increasing the surface strength is low.

The present inventors confirmed that cost reduction and process shortening are possible by attempting consolidation using a multi-stage press in order to use bamboo as a flooring material instead of a structural aggregate material, and the other side of the consolidated high strength bamboo end plate The present invention has been completed by manufacturing a bamboo flooring material by plywood, fiberboard (HDF, MDF), particle board, and other heterocomposite materials, which are wood materials.                         

The present invention can control the consolidation rate up to 50% by applying rice and wood plant bamboo, and by using a multi-stage press to achieve consolidation in a single process without pre-treatment process, low cost simple bamboo flooring material having excellent surface strength The purpose is to provide the process.

In order to achieve the above object, the present invention provides a high-strength bamboo flooring material comprising at least one layer of the bamboo veneer compacted using a multi-stage press in the flooring of a multi-layer structure.

The compaction rate of the bamboo veneer is preferably 35 to 50% of the density before and after compaction.

Bamboo flooring of the present invention includes at least one bamboo veneer, and may further include one or more layers selected from wood material layer, synthetic resin layer, surface coating layer.

The wood material constituting the wood material layer is at least one selected from bamboo veneer, solid wood, plywood, veneer, particle board, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), and OSB (Oriented Strand Board).

The synthetic resin layer is a layer containing at least one selected from polyvinyl chloride, polyethylene, polypropylene, olefins and rubber as the base resin, and in order to provide functionality, charcoal, loess, silver, elvan, germanium, magnetite, jade, It may include one or more functional substances selected from antibacterial agents and insect repellents.                     

The compacted bamboo veneer may be impregnated with at least one hardening resin selected from epoxy, phenol, acrylic, melamine, polyurethane, unsaturated polyester, and diallyl phthalate for the purpose of further reinforcing surface strength.

In addition, the present invention comprises the steps of manufacturing a bamboo veneer by cutting the length and width to fit a predetermined area after thermally plywood bamboo bamboo pieces using a hot pressing press; Stacking the prepared bamboo end plates by two to six sheets at one end of the multi-stage press, and then performing a hot press and a cold press to consolidate the bamboo end plates; Stacking at least one compacted bamboo veneer and at least one layer selected from a wood material layer and a synthetic resin layer; It provides a method of producing a high strength bamboo flooring comprising the step of forming a surface coating layer.

In the manufacturing step of the bamboo veneer, by using a hot pressing press the bamboo bamboo pieces horizontally or vertically at a pressure of 5 to 15 kg / ㎠ for 60 to 180 seconds at a temperature of 100 to 140 ℃, after the length 600 to 1,200 A bamboo veneer having a thickness of 1 to 4 mm was produced by cutting into mm and a width of 600 to 1,200 mm.

In the consolidation step of the bamboo end plate, the prepared bamboo end plate is laminated on a multi-stage press by 2 to 6 sheets at one end, and then 100 to 140 ° C. at a temperature of 100 to 140 ° C. at a pressure of 30 to 90 kg / cm 2 and then 100 to 100 Cold press for 500 seconds to consolidate the bamboo veneer.

In the condensation condition, while having a condensation rate of 35%, the color should not be greatly changed, such as carbonization, in bamboo, and the overall thickness uniformity should be secured.                     

The present invention improves the surface strength and impact resistance by consolidating bamboo using a multi-stage press, and has an advantage of securing dimensional stability by suppressing deformation of bamboo due to moisture and heat by increasing the crystallization region in the bamboo tissue. . In addition, it is possible to manufacture environmentally friendly natural bamboo flooring material by removing formaldehyde, which is a harmful substance that occurs after adhering bamboo bamboo pieces to each other during hot press through press, and to secure mass production and productivity by manufacturing using multi-stage press. That has an important advantage.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and examples.

1 shows that the density profile of the bamboo veneer compacted according to the present invention, the density of the bamboo veneer increased by nearly two times, and the impact resistance increased by three times.

At this time, the surface strength of the bamboo flooring material is cut at a certain size at room temperature according to the conventional surface strength measurement method, and in the case of impact resistance, it is freely dropped in 10 cm increments using a 228 g weight, and the surface is visually determined for damage. It was measured by.

Consolidated bamboo must have an impact strength of about 80 centimeters that can drop objects in everyday life, and the consolidation rate is usually about 35% to satisfy physical properties. As can be seen in Figure 1, the bamboo flooring of the present invention fulfills this requirement.

FIG. 2 is a cross-sectional view of the bamboo veneer compacted according to the present invention, in which bamboo bamboo pieces 11 are thermally laminated by a hot press to form a bamboo veneer 10. In addition, the bamboo bamboo pieces 11 may be vertically thermally laminated to constitute a bamboo end plate 10.

Figure 3 is a cross-sectional view of the bamboo flooring according to the first embodiment of the present invention, the bamboo flooring is composed of a surface coating layer (1) from the top, the compacted bamboo end plate 10, the wood material layer (20) . Wood materials used in the wood material layer 20 is wood, plywood, veneer, particle board, MDF, HDF, OSB and the like.

Figure 4 is a cross-sectional view of the bamboo flooring according to the second embodiment of the present invention, the bamboo flooring is from the top surface coating layer (1), consolidated bamboo veneer (10), wood material layer (20), synthetic resin layer ( 30).

The synthetic resin layer 30 is made of a polyvinyl chloride, polyethylene, polypropylene, olefins, rubber, etc. as a base resin and a layer composed of a plasticizer, a filler, and other additives, far infrared radiation effect, harmful substance removal effect, Charcoal, loess, silver, elvan, germanium, magnetite, jade, antibacterial agents, insect repellents and the like may be added to impart functionality such as bactericidal effect, antibacterial effect and insect repellent effect.

5 is a cross-sectional view of a bamboo flooring according to a third embodiment of the present invention, wherein the bamboo flooring is composed of a surface coating layer (1), two consolidated bamboo veneers (10), and a wood material layer (20) from above. It is.

6 is a cross-sectional view of a bamboo flooring according to a fourth embodiment of the present invention, wherein the bamboo flooring is from the top surface coating layer (1), the consolidated bamboo veneer (10), wood material layer (20), consolidated It consists of a bamboo end plate 10.                     

7 is a cross-sectional view of the bamboo flooring according to the fifth embodiment of the present invention, wherein the bamboo flooring is composed of only the surface coating layer 1 and three compacted bamboo end plates 10 from above.

8 is a cross-sectional view of the bamboo flooring according to the sixth embodiment of the present invention, wherein the bamboo flooring is from the top surface coating layer (1), consolidated bamboo veneer (10), synthetic resin layer (30), wood material layer ( 20).

Example 1

First Step: Manufacturing Process of Bamboo Single Plate Using Hot Press

The bamboo bamboo pieces were heated or pressed vertically at a temperature of 120 ° C. for 120 seconds with a pressure of 10 kg / cm 2 horizontally or vertically, and then cut into a length of 910 mm and a width of 910 mm to fit a predetermined area. Prepared.

Second Process: Consolidation Process of Bamboo Single Plate Using Multi-stage Press

The laminated bamboo boards were laminated on a multi-stage press, each of 2 to 6 sheets, then hot pressed for 800 seconds at a temperature of 110 ° C. at a pressure of 60 kg / cm 2 and then cold-pressed for 300 seconds to consolidate the bamboo end plates and separate them from the multi-stage press. It was.

Third process: plural lamination process of consolidated bamboo veneers and other heterocomposites

The plywood was laminated with adhesive in order as the bamboo end plate 10 and the wood material layer 20 consolidated from above.

4th process: cutting and surface coating process

The surface of the compacted bamboo veneer 10 is treated with a UV-curing type treatment agent under the middle and middle, and then cut into parquet, processed grooves and protrusions according to a predetermined standard, and then coated with a top coat surface coating layer. The illustrated bamboo flooring was prepared.

Example 2

In the third step of the first embodiment, the bamboo flooring plate 10 and the wood material layer 20 condensed from above, plywood and the synthetic resin layer 30 in order to produce a bamboo flooring material shown in FIG. It was.

Table 1 compares the properties of the bamboo end plates prepared according to the above example and the bamboo end plates manufactured by conventional compression processing, and the consolidation rate, surface strength, dimensional stability, and processing cost of the examples were superior to those of the comparative example. It can be seen.

Example Comparative example Consolidation ratio 35% 20% Surface strength 80 cm 40 cm Heating dimension stability (L / W) -0.30% /-1.00% -0.55% /-1.20% Immersion dimension stability (L / W) 0.02% / 2.00% 0.05% / 2.15% Processing cost \ 1,000 / pyeong \ 3,800 / pyeong

When manufactured using the multi-stage press proposed in the present invention, it is possible to produce a high-strength bamboo flooring material that can be commercialized to ensure mass productivity and productivity through cost reduction and process shortening. In addition, by densifying bamboo has improved the surface strength and impact resistance, and by increasing the crystallization region in the bamboo tissue has the advantage of restraining the deformation of the bamboo due to moisture and heat to secure the dimensional stability. In addition, it is possible to manufacture environmentally friendly natural bamboo flooring by naturally removing formaldehyde, which is a harmful substance generated after adhering bamboo bamboo pieces, to each other during hot pressing through a press.

Claims (10)

In the flooring of the multi-layer structure, comprising at least one layer of bamboo veneer consolidated using a multi-stage press, The compaction rate of the bamboo veneer is a high-strength bamboo flooring, characterized in that 35 to 50% of the density before and after compaction. delete The method of claim 1, further comprising at least one layer selected from wood material layer, synthetic resin layer, surface coating layer, The wood material is at least one selected from bamboo veneer, solid wood, plywood, veneer, particle board, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), OSB (Oriented Strand Board), The synthetic resin layer includes at least one selected from polyvinyl chloride, polyethylene, polypropylene, olefin, rubber as the base resin, The surface coating layer is a high-strength bamboo flooring, characterized in that consisting of the undercoat, the intermediate and the top coat layer cured by coating a UV curing treatment agent. delete delete delete The method of claim 1 or 3, wherein the compacted bamboo veneer is impregnated with at least one hardening resin selected from epoxy, phenol, acrylic, melamine, polyurethane, unsaturated polyester, diallyl phthalate. High strength bamboo flooring. Manufacturing a bamboo veneer by thermally plywood bamboo bamboo pieces horizontally or vertically using a hot press and then cutting the length and width to fit a predetermined area; Stacking the prepared bamboo end plates by two to six sheets at one end of the multi-stage press, and then performing a hot press and a cold press to consolidate the bamboo end plates; Stacking at least one compacted bamboo veneer and at least one layer selected from a wood material layer and a synthetic resin layer; Forming a surface coating layer, In the consolidation step of the bamboo end plate, the prepared bamboo end plate is laminated on a multi-stage press by 2 to 6 sheets at one end, and then 100 to 140 ° C. at a temperature of 100 to 140 ° C. at a pressure of 30 to 90 kg / cm 2 and then 100 to 100 Cold press for 500 seconds to consolidate the bamboo plate The wood material is at least one selected from bamboo veneer, solid wood, plywood, veneer, particle board, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), OSB (Oriented Strand Board), The synthetic resin layer includes at least one selected from polyvinyl chloride, polyethylene, polypropylene, olefin, rubber as the base resin, The surface coating layer is a method of producing a high-strength bamboo flooring, characterized in that consisting of the undercoat, the intermediate and the top coat layer is cured by coating a UV curing treatment agent. The method according to claim 8, wherein in the manufacturing step of the bamboo veneer, the bamboo bamboo plywood is hot-pressed in a horizontal or vertical manner for 60 to 180 seconds at a temperature of 100 to 140 ° C at a pressure of 5 to 15 kg / cm2, and then a predetermined area. According to the 600 to 1,200 mm in length and 600 to 1,200 mm in width by cutting to produce a bamboo veneer having a thickness of 1 to 4 mm characterized in that the manufacturing method of high-strength bamboo flooring. delete

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