JP2010504866A - Symmetrical wood flooring using heat-treated wood and method for manufacturing the same - Google Patents

Abstract

The present invention provides a wood flooring having a symmetrical structure in which heat-treated wood is applied to an upper layer and a lower layer, and a method for manufacturing the same.
[MEANS FOR SOLVING PROBLEMS] An intermediate substrate comprising a surface layer comprising an ultraviolet curable or thermosetting surface treatment layer and a woody board such as natural wood, water-resistant plywood, MDF, HDF, particle board, resin wood powder mixed board, etc. And a heat-treated wood layer that is symmetrically laminated on the upper and lower parts around the base material layer, and has a finished product form that is cut into an appropriate standard and then processed into a T & G (Tongue and Groove) form.

Description

  The present invention relates to a wood flooring having a symmetrical structure in which heat-treated wood is applied to an upper layer and a lower layer, and a manufacturing method thereof. It is related to wood flooring with a symmetrical structure that balances and perfectly solves the problem of deformation caused by environmental changes.

  In general, a wood board having an upper layer thickness of less than 2 mm is called a plywood floor, and a wood board of 2 mm or more is commonly called a natural wood floor. A typical natural wood floor is composed of a surface material of 2 mm or more and a plywood or strip of 5 to 7 mm as a base material. The plywood floor is limited to a width of 75, 92 mm and a length of 900 mm, while the natural wood floor is manufactured in various specifications with a width of 65 to 210 mm and a length of 360 to 2,25 mm. . There are also products that are subjected to WPC (Wood Plastic Composite) impregnation treatment for surface reinforcement.

  However, unlike a plywood floor using thin patterned wood, a natural wood floor using a single board of 2 mm or more is inferior to Korea because of its dimensional stability and warping stability due to changes in moisture conditions. The vulnerabilities are exposed to the Ondol culture.

  In addition, natural wood floors that are distributed throughout the city have a veneer of 2 mm or more in the upper part, and plywood and straps in the lower part (a square material with a relatively small size compared to the width of the floor is the grain direction of the surface material. Due to the vertically asymmetric structure including the vertically bonded base material, the overall structure cannot be balanced and the basic physical properties of the product are inferior to the plywood floor.

  Japanese Unexamined Patent Publication No. 1994-158842 discloses a wooden floor heating panel in which a heater is provided in a groove of a base material plywood, but it has an asymmetric structure centering on the base material layer.

  Japanese Unexamined Patent Publication No. 2005-161624 discloses a wood composite board used as a floor board of a truck, but it does not use a heat-treated wood layer and is insufficient in dimensional stability.

  US Patent Publication No. 2005/0153150 discloses a bamboo board used for a container floor, but it does not use a heat-treated wood layer and is insufficient in dimensional stability.

  Japanese Unexamined Patent Publication No. 2003-251616 discloses a carbonized wood fiber heat insulating material, but relates to a flame extinguishing material used for an outer wall or a floor, not a floor material.

Japanese Unexamined Patent Publication No. 1994-158842 Japanese Unexamined Patent Publication No. 2005-161624 US Patent Publication No. 2005/0153150 Japanese Unexamined Patent Publication No. 2003-251616

  The present invention was devised to solve the above-mentioned problems of the prior art, and its purpose is to use existing heat treated wood for the upper layer and the lower layer so that the rate of change due to moisture and heat is excellent. Compared with wood floor, the dimensional stability can be improved, and the lower layer structure can be finished with the same material as the upper layer to solve the heat deflection due to moisture, especially by giving the stability of symmetrical structure, Korea Is providing wood flooring designed to suit the Ondol culture.

  Another object of the present invention is to provide a wood flooring that can enhance the sensitivity image by upgrading the material color (wood color) through heat treatment.

  In order to achieve the above-mentioned object, the present invention provides a wood flooring including a base material layer and a heat treated wood layer laminated symmetrically on the upper and lower portions of the base material layer.

  The present invention is characterized in that the heat treated wood is symmetrically formed on the upper and lower portions of the base material layer, thereby dramatically improving the dimensional stability and at the same time achieving a high quality wood color through the heat treatment.

  In the present invention, the heat-treated wood layer is preferably a single plate heat-treated at a temperature of 150 to 230 ° C.

  The chemical components constituting the wood are roughly classified into cellulose (Cellulose), hemicellulose (Hemicelluloses), lignin (Lignin), and an extract.

  Among such chemical components, hemicellulose undergoes thermal decomposition at a temperature of 150 ° C. or more, and the chemical and physical properties of wood change. In addition, the thermal decomposition of cellulose occurs at 240 to 350 ° C., but the decomposition of cellulose causes a serious decrease in strength of wood.

  During this heat treatment process, the shrinkage and expansion rate are stably maintained by reducing the moisture adsorption point, the biological durability is improved, the wood color becomes darker, the extract in the wood moves, and the wood becomes lighter , Equilibrium moisture content is reduced and insulation performance is improved.

  A desirable form of the wood flooring to be applied in the present invention is a natural wood floor in which the upper heat-treated wood layer has a thickness of 2 mm or more.

  In the present invention, the base material layer is selected from natural wood, water-resistant plywood, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), particle board, and resin wood powder mixed board 1 It consists of more than a kind of wooden board.

  The wood flooring of the present invention comprises a surface treatment layer, a heat treated wood layer, a base material layer, and a heat treated wood layer from above.

  In order to give various functions to the wood floring of the present invention, charcoal, ocher, silver, barley stone, germanium, magnetic steel, balls, One or more functional substances selected from antibacterial and insect repellents; one or more cured resins selected from epoxy, phenol, acrylic, melamine, polyurethane, unsaturated polyester, diallyl phthalate; calcium carbonate, talc One or more fillers selected from titanium oxide, silica, glass powder, silicon dioxide; and / or selected from phosphonates, halogenated hydrocarbons, antimony oxide, aluminum hydroxy, phosphate compounds, dicyandiamide One or more flame retardants can be added.

  In the present invention, a single board having the same thickness is applied to the upper layer and the lower layer of the floor material, and a wood-based board such as natural wood, water-resistant plywood, MDF, HDF, particle board, resin wood powder mixed board, etc. is used as an intermediate base material layer. Through the applied three-layer structure, the upper and lower symmetrical structures are laminated so as to be balanced, and the problem of deformation due to environmental changes can be solved by integrating them at a constant temperature and pressure.

  In addition, by applying a single plate with a thickness of 2 mm or more that is heat-treated at high temperature to the upper and lower layers, it can be used in any environment, and can be used in any environment, and bends from the floor through T & G processing. The difference in level between products can be solved.

It is sectional drawing of the wood flooring of the symmetrical structure which concerns on this invention.

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

  FIG. 1 is a cross-sectional view of a symmetric structure wood flooring according to the present invention, which is composed of a surface treatment layer 10, a heat treatment wood layer 20, a base material layer 30 and a heat treatment wood layer 20 from above.

  The surface treatment layer 10 is composed of a normal ultraviolet curable or thermosetting surface treatment layer.

  The heat-treated wood layer 20 is a wood layer that leads to dimensional stability by heat treatment at a high temperature. When the wood is heat-treated, the moisture content of the wood is reduced, so that the dimensional stability is improved, and the wood is dark and dark. Become a luxury product.

  The heat-treated wood layer 20 is preferably composed of a single plate of 2 mm or more which is heat-treated at a temperature of 150 to 230 ° C., and both the upper layer and the lower layer are composed of the same material and the same thickness for a completely symmetrical structure. It is desirable to do. Common wood can be used as the veneer.

  The base material layer 30 is made of a wood-based board such as natural wood, water-resistant plywood, MDF, HDF, particle board, resin wood powder mixed board.

  In order to give various functions to the wood flooring according to the present invention, at least one of the surface treatment layer 10, the heat treatment wood layer 20, and the base material layer 30 is made of charcoal, ocher, silver, barley stone, germanium, magnetite steel, Functional materials such as balls, antibacterial agents, and insect repellents can be added to provide functions useful for health such as far-infrared radiation, anion divergence, antibacterial, and insect repellent. In addition, cured resin such as epoxy, phenol, acrylic, melamine, polyurethane, unsaturated polyester, diallyl phthalate can be added to improve the physical properties such as product durability, abrasion resistance, water resistance, calcium carbonate, Addition of fillers such as talc, titanium oxide, silica, glass powder, silicon dioxide can provide functions such as ondol effect, heat conduction improvement, phosphonate ester, halogen hydrocarbon, antimony oxide, aluminum hydroxy, A flame retardant such as a phosphoric acid compound or dicamide may be added to a flame retardant such as amide to provide a flame retardant function.

  In order to manufacture a wood flooring including a heat-treated wood layer, a heat-treated raw material is prepared by cutting into a square material having a thickness that allows a large amount of veneer to be obtained after sawing.

  Oak, Birch, Walnut, Cherry, Ash, and Larch are Korean coniferous species that can be used for heat-treated wood layers. A water content of 5 to 10% can be used.

  The raw material can be used for the heat treatment as it is, but it is better to dry it beforehand if necessary. In addition, the four surfaces of the square can be finished with a hook, and a high-quality surface state can be derived after the heat treatment.

  The heat treatment process takes 12 to 24 hours depending on the conditions.

  The heat treatment process is roughly divided into three stages: drying, high-temperature treatment, and cooling. Although the drying process is said to be high temperature drying as the first stage, it is a process of lowering the moisture content in the wood to almost 0%. Considerable care must be taken to prevent internal splits. Depending on the initial moisture content, tree species and wood thickness, the drying stage conditions will vary.

  The second stage is a high-temperature treatment process, in which the temperature is raised to a preset temperature of 150 to 230 ° C., and then the optimum temperature is maintained for a certain time. At this time, steam is used to prevent fire and control chemical changes in the wood.

  The last stage is a cooling stage, which should prevent the wood from cracking due to a high temperature difference between the heat-treated wood and the outside air. At this time, it is necessary to adjust the heat-treated wood to a proper moisture content level according to the end use application. The typical final moisture level is 5-7% and is cooled for 5-15 hours depending on the heat treatment temperature.

  Each condition (heat treatment maximum temperature, steam use degree, operation time for each stage) can be optimized according to the tree species (birch, conifer) used in the heat treatment process.

  The wood thus heat-treated is cut and finished according to wood flooring standards and used for the upper layer and the lower layer, and the layers are integrated with the base material layer at a constant temperature and pressure to form a wood flooring.

  After the heat treated wood layer 20, the base material layer 30, and the heat treated wood layer 20 are integrated into a symmetrical structure by pressure bonding, the surface treated layer 10 is formed and cut into a T & G form to have a heat treated wood layer. Flooring was produced.

  At this time, as the heat-treated wood layer 20 applied to the upper layer and the lower layer, a heat-treated wood layer 20 having a thickness of about 3.0 mm and a water content of 5 to 7% after heat treatment at 180 to 200 ° C. was used. As an example, we used a Filand birch plywood with a thickness of 4.0 mm and a water content of 5%, and the adhesive was based on an aqueous emulsion vinylurethane and mixed with a curing agent up to 10%. A room-temperature curable resin that can be pressure-bonded at room temperature was used.

The manufacturing process will be described in detail. After laminating each layer, the layers are integrated by a press. At this time, the pressure is 12 kgf / cm ² under normal temperature conditions, and the pressing time is 60 minutes for integration. After sanding the integrated surface layer, after coating in the order of undercoat and intermediate coat, cut with Tenoner so that the actual product size is 70mm wide and 590mm long, and T & G processing on the side (Tongue and Groove), and finally finished with a surface coating.

  In Example 1, the base material layer 30 was manufactured by laminating a Burma teak core board. The subsequent manufacturing steps were manufactured in the same manner as in Example 1.

Comparative Example 1

  Untreated natural wood floor with the same structure as in Example 1

Comparative Example 2

  General natural wood floor on the market

Test example

  The physical properties of the wood flooring of the symmetrical structure in which the heat-treated wood of the present invention manufactured based on the above embodiment is applied to the upper layer and the lower layer are the same as the physical properties of the untreated natural wood floor having the same structure and the existing natural wood floor material. As a result, as can be confirmed from Table 1, the dimensional stability and the bending stability of the wood flooring produced in the example were superior to the natural wood floor of the comparative example.

Here, in the case of high temperature conditions, it is dried for 6 hours with an 80 ° C. dryer, and in the case of immersion conditions, after immersing in room temperature water for 6 hours, the width and length direction dimensions and the warping degree are set to vernier calipers (vernier calipers) and thickness gauges.

  According to the present invention, a Korean-style natural wood flooring designed to be applied to Ondol culture is provided.

10: Surface treatment layer 20: Heat treated wood layer 30: Base material layer

Claims (10)

  Wood flooring comprising a heat-treated wood layer above or below the base material layer.   2. The wood flooring according to claim 1, wherein the heat-treated wood layer is laminated on an upper portion and a lower portion of the base material layer to exhibit a symmetric structure.   The wood flooring according to claim 1, wherein the heat-treated wood layer is a single plate heat-treated at a temperature of 150 to 230 ° C.   The wood flooring according to claim 1, wherein the upper heat-treated wood layer is a natural wood floor having a thickness of 2 mm or more.   The base material layer is composed of one or more woody boards selected from natural wood, water-resistant plywood, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), particle board, and resin wood powder mixed board. The wood flooring according to claim 1.   The wood flooring according to claim 1, comprising a surface treatment layer, a heat treatment wood layer, a base material layer, and a heat treatment wood layer from above.   One or more layers selected from the group consisting of a surface treatment layer, a heat treatment wood layer, and a base material layer are selected from charcoal, ocher, silver, barley stone, germanium, magnetic steel, ball, antibacterial agent, and insect repellent. The wood flooring according to claim 6, comprising a functional substance.   At least one of the surface treatment layer, the heat treatment wood layer, and the base material layer contains at least one cured resin selected from epoxy, phenol, acrylic, melamine, polyurethane, unsaturated polyester, and diallyl phthalate. The wood flooring according to claim 6, wherein:   One or more of the surface treatment layer, the heat treatment wood layer, and the base material layer include one or more fillers selected from calcium carbonate, talc, titanium oxide, silica, glass powder, and silicon dioxide. The wood flooring according to claim 6, characterized in that   One or more flame retardants in which one or more of the surface treatment layer, the heat treatment wood layer, and the base material layer are selected from phosphonates, halogen hydrocarbons, antimony oxide, aluminum hydroxy, phosphate compounds, and dicyandiamide The wood flooring according to claim 6, comprising:

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