KR20100025723A - Wood flooring having transfer-printed supporting layer - Google Patents

Abstract

PURPOSE: A wood flooring member with a transfer-printed reinforcing layer and a manufacturing method thereof are provided to display accurate and various surface images with low cost and improve surface property such as shock resistance. CONSTITUTION: A wood flooring member comprises a plywood layer(40), an adhesive layer(30), a reinforcing layer, a printing layer(21), and a surface coating layer(10). The reinforcing layer comprises an impregnated paper reinforcing layer(22) or a synthetic resin sheet reinforcing layer. The impregnated paper reinforcing layer or the synthetic resin sheet reinforcing layer is integrated with the printing layer by high-pressure press. The printing layer is a decalcomania layer. The surface coating layer comprises a surface primer layer, a lower layer, a middle layer, and an upper layer which are successively laminated.

Description

Floor flooring with transfer-printed reinforcement layer and its manufacturing method {WOOD FLOORING HAVING TRANSFER-PRINTED SUPPORTING LAYER}

The present invention relates to a flooring material in which transfer printing is performed on a reinforcement layer and plywood is formed of a base material, and more particularly, a transfer layer is formed on an upper portion of the reinforcement layer and a base layer is formed on the bottom of the reinforcement layer. It provides the flooring material which can realize the effect and is excellent in impact resistance, scratch resistance and scratch resistance.

Ondol parquet flooring manufactured by laminating natural veneer on the surface of water-resistant plywood and surface coating process maximizes the natural texture of wood and uses the waterproof plywood layer to provide excellent dimensional stability against heat and moisture. Not only is the density low but also the density of the plywood itself is low (0.5 to 0.7 g / cm 3), so that even if the surface is UV coated, the surface has low scratch resistance (0.5 to 2.0 N in diamond chip testing) and low impact resistance ( 286 g metal ball free fall test 10 to 15 cm), which may cause damage to the flooring surface when users drop the household items or move heavy objects due to carelessness when using the flooring material. In addition, because the veneer of the surface layer is a natural material, the price is not only high, but also due to the nature of the veneer, there are many different colors between the products, and a lot of surface defects such as bursting of the veneer, dead knots, gum, and knife marks occur.

On the other hand, the reinforced flooring material manufactured by stacking a printing layer and a melamine impregnated overlay sheet on a high-density fiberboard (HDF) layer, which is a base material layer, and a balance layer on a lower part, has a stronger surface property than the water-resistant plywood ondol flooring material, but it is a thermosetting melamine. Since resin is used as a surface layer, it is sensitive to moisture and has a very brittle surface, which gives a cold feeling to the user. Compared with plywood ondol flooring, physical properties such as water resistance and heat resistance dimensional stability (shrinkage and expansion) and waterproof thickness expansion rate are worse.

The present invention is to solve the conventional problems as described above, by integrating the reinforcing layer and the transfer printing layer without an adhesive and a primer to increase the surface properties such as impact resistance, scratch resistance and display various and sophisticated surface images at low cost It is possible to provide a flooring material having excellent water resistance, heat resistance dimensional stability, waterproof thickness expansion ratio, and the like by using plywood as the base material layer.

Another object of the present invention is to improve the surface properties such as scratch resistance, scratch resistance by selecting and adding an inorganic material (glass flakes, ceramics, clay, silica, etc.) to the surface coating layer, to a heavy or sharp object It is to provide a flooring material that can prevent surface damage, such as stamping, cracking, scratches caused by.

Still another object of the present invention is to provide a method of manufacturing flooring material having improved workability and productivity, including a method of forming a reinforcing layer, a transfer printing layer, and a surface coating layer under certain conditions.

The present invention is to achieve the above object, and provides a flooring material comprising a plywood layer, an adhesive layer, a reinforcing layer, a printing layer and a surface coating layer sequentially laminated.

In addition, the reinforcing layer is characterized in that it comprises an impregnated paper reinforcing layer or synthetic resin sheet reinforcing layer.

In addition, it characterized in that it comprises a back layer below the plywood (Plywood) layer.

In addition, the back layer is characterized by consisting of at least one selected from paper, metal foils, ultraviolet curing surface treatment agent, thermosetting surface treatment agent, synthetic resins, waxes, silicone-based water repellent and silicone-based waterproofing agent.

In addition, the impregnated paper reinforcement layer or synthetic resin sheet reinforcement layer is characterized in that the printed layer and the high pressure press integrated.

In addition, the impregnated paper reinforcing layer is characterized in that the white kraft paper having a basis weight of 80 to 300 g / ㎡ is impregnated with melamine or phenol resin 40 to 50%.

In addition, the synthetic resin sheet reinforcing layer is PVC (Poly Vinyl Chloride), PE (Ploy Ethylene), PET (Ploy Ethylene Terephthalate), PETG (Ploy Ethylene Terephthalate Glycolmodified), HIPS (High Impact Polystyrene), ABS (Acrylonitrile Butadiene Styrene), PU (Poly Urethane), SBS (Styrene Butadiene Styrene Block Copolymer), SBS (Styrene Ethylene Butadiene Styrene Block Copolymer), SBS (Syndiotactic Poly Stylene) and SEPS (Styrene Ethylene Propylene Styrene Block Copolymer) It features.

In addition, the printing layer is characterized in that the transfer printing layer transfer-printed on polyethylene terephthalate (PET) transfer paper.

In addition, the surface coating layer is characterized in that it comprises a surface primer layer, a lower layer, a middle layer and a top coat layer laminated sequentially.

In addition, the undercoat and the topcoat layer is characterized in that it comprises an inorganic material.

In addition, the inorganic material is characterized in that at least one member selected from the group consisting of ceramic, glass chop, clay and silica.

In addition, the flooring material is characterized in that it has a connection structure by T & G (Tongue and Groove), click (Click) system or connector.

In addition, the present invention comprises the steps of forming a transfer printing reinforcing layer by integrating the reinforcing layer and the transfer printing layer; Bonding the transfer printing reinforcement layer on the plywood layer by cold pressure bonding; Forming a surface coating layer on the transfer printed reinforcement layer; It provides a method for producing a floor covering material comprising the step of cutting and shape processing.

In addition, the surface primer layer is formed by coating an aqueous resin on the transfer printing reinforcement layer and then drying for 30 seconds to 5 minutes in an oven at 50 to 160 ℃.

In addition, the transfer printing reinforcing layer is heated and pressurized the impregnated paper reinforcing layer and the transfer printing layer in a thermostatic press at a pressure of 20 to 200kg / ㎠ at a temperature of 110 to 180 ℃ 15 to 30 minutes, under the same pressure 15 to 30 Cooling for one minute and then integrating, or heating and pressing the synthetic resin sheet reinforcement layer and the transfer printing layer in a thermostatic press at a temperature of 80 to 150 ° C. at a pressure of 20 to 200 kg / cm 2 for 1 to 5 minutes and then under the same pressure. After cooling for 30 minutes to form an integrated.

The present invention relates to a flooring material applying transfer printing to a reinforcing layer and forming a plywood, and a method of manufacturing the same. The flooring material having various and sophisticated surface image effects by performing transfer printing on the upper part of the reinforcing layer and forming a base layer on the lower part. To provide.

Floor flooring material of the present invention can integrate the transfer printing and reinforcing layer without adhesives and primers to form a surface layer at a lower cost than flooring material using natural veneer, and the product such as stamping, cracking, pressed by the low density of veneer and plywood While damage occurs, the reinforcing layer exhibits excellent impact resistance, scratch resistance, and scratch resistance.

It has little difference in color between products, and there are no surface defects such as pattern rupture, dead knots, knife marks, etc., and it is water-resistant and heat-resistant dimensions due to the property of plywood which has excellent physical properties compared to reinforced floor made of fiber board as core layer. Its excellent physical properties such as stability and water-thickness expansion rate can ultimately lead to differentiation from other products.

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

The present invention includes a plywood layer, an adhesive layer, a transfer printing reinforcing layer, and a surface coating layer which are substrate layers sequentially from below.

1 is a cross-sectional view of a floor covering according to an embodiment of the present invention, which is composed of a surface coating layer 10, a transfer printing layer 21 and an impregnated paper reinforcement layer 22 sequentially stacked from above. It is composed of a printing reinforcing layer 20, adhesive layer 30, and plywood layer 40, Figure 2 is a cross-sectional view of the floor covering according to another embodiment of the present invention, the floor covering is a surface coating layer (from above) 10), a transfer printing reinforcing layer 20 composed of a transfer printing layer 21 and a synthetic resin sheet reinforcing layer 22 ', an adhesive layer 30, and a plywood layer 40.

The surface coating layer 10 is finished by UV surface coating treatment on the transfer printing reinforcing layer 20, the surface coating layer 10 is generally composed of a surface primer layer, a lower layer, a middle layer and a top coat layer from below. .

The surface coating layer 10 is a UV-curable or thermosetting type of synthetic resin mainly composed of urethane acrylate, and is made of epoxy resin, polyamide resin, urea resin, and acrylate resin in order to have a surface property resistant to abrasion or impact. It is preferable to use 1 or more types of resin chosen from the group, and especially epoxy resin is preferable.

The surface primer layer is formed by ultraviolet curing the monomer and oligomer having a relatively low molecular weight in order to increase the impact resistance and tack resistance of the surface, preferably using an aqueous acrylic having a molecular weight of 100,000 to 200,000, wherein 10 seconds to 4 It is preferable to cure ultraviolet for minutes.

The undercoat and the topcoat are added with inorganic materials such as ceramics, glass chops, clays, silicas, and the like to improve surface properties such as scratch resistance. The surface damage of the can be prevented, the amount is preferably 0.1 to 10% by weight.

The transfer printing reinforcing layer 20 is constructed by integrating the impregnated paper reinforcing layer 22 or the synthetic resin sheet reinforcing layer 22 'from the bottom into the transfer printing layer 21. In the case of using the impregnated paper reinforcing layer 22, heated and pressurized for 15 to 30 minutes at a pressure of 20 to 200 kg / cm 2 at a temperature of 110 to 180 ° C. in a thermostatic press, and then cooled for 15 to 30 minutes under the same pressure, Complete the transfer printing reinforcement layer 20.

In another embodiment of the present invention, when using the synthetic resin sheet reinforcing layer (22 ') and heated and pressurized for 1 to 5 minutes at a pressure of 20 to 200kg / ㎠ at a temperature condition of 80 to 150 ℃ in a thermostatic press, the same pressure After cooling for 15 to 30 minutes, the transfer printing reinforcement layer 20 is completed.

The transfer printing layer 21 is a transfer printing technology is applied to create a natural effect of the wood, according to the needs of the consumer (Oak), birch (Birch), cherry (Cherry), maple (Maple), The pattern of all species used as veneer such as walnut can be true and free, and it is a layer printed by using general-purpose polyethylene terephthalate (PET) transfer paper.

In the present invention, the impregnated paper reinforcing layer 22 used as a reinforcing layer having a function for improving surface properties such as chipping, cracking, and crushing caused by the low density of plywood and veneer is white kraft having a basis weight of 80 to 300 g / m 2. The paper is preferably impregnated with melamine or phenol resin for 40 to 50%, dried and semi-cured in an oven at 80 to 150 ° C. for 0.5 to 3 minutes, and a plurality of white kraft papers are used for higher surface strength. It may be.

Used as another reinforcement layer Synthetic resin sheet reinforcing layer (22 ') is integrated with the transfer printing layer (21) to improve the surface properties, PVC (Poly Vinyl Chloride), PE (Ploy Ethylene), PET (Ploy Ethylene Terephthalate), PETG (Ploy Ethylene Terephthalate Glycolmodified) , HIPS (High Impact Polystyrene), ABS (Acrylonitrile Butadiene Styrene), PU (Poly Urethane), SBS (Styrene Butadiene Styrene Block Copolymer), SEBS (Styrene Ethylene Butadiene Styrene Block Copolymer), SPS (Syndiotactic Poly Stylene), SEPS (Styrene) Ethylene Propylene Styrene Block Copolymer) is preferably used. Particularly preferred resins are PVC, PETG, and in the case of PVC can cause environmental pollution using a plasticizer, it is preferable to use PETG in consideration of environmentally friendly aspects.

The composition of the preferred synthetic resin sheet reinforcing layer 22 'is a plasticizer based on 100 parts by weight of one or more selected synthetic resins selected from PVE, PE, PET, PETG, HIPS, ABS, PU, SBS, SEBS, SPS, SEPS. Or 10 to 50 parts by weight of EVA (Ethylene Vinyl Acetate) resin and 1 to 5 parts by weight of a processing agent. Synthetic resin sheet reinforcing layer may be composed of a single layer or a composite layer, the resin constituting this may be composed of one or more kinds of mixed resin.

The adhesive constituting the adhesive layer 30 may be a thermosetting melamine resin, a thermosetting or room temperature-curable urethane or epoxy resin, polyvinyl alcohol, polyvinylacetate, or the like, and a room temperature curing resin is preferable.

Plywood constituting the plywood layer 40 is preferably used having a specific gravity of 0.55 to 0.8 g / cm 3. Plywood is manufactured by orthogonal lamination of single plates 3, 5, 7, etc., so that defects such as knots are dispersed, resulting in better dimensional stability than solid wood, higher mechanical strength, and higher water resistance and heat resistance than fiber boards used as substrates for reinforced floors. Because of excellent physical properties such as stability and water-thickness expansion rate, it is possible to greatly improve the dimensional stability and moisture resistance when used as a base material layer of the flooring material.

In the present invention, the back layer may be formed for structural stability of the flooring material. The back layer is coated with papers, metal foils, UV curable surface treatment agents, thermosetting surface treatment agents, synthetic resins, waxes, silicone-based water repellents, and silicone-based waterproofing agents. It is formed by. By forming the back layer on the back surface of the plywood layer, the deformation problem caused by the change of humidity can be solved.

In the flooring material of the present invention, it is preferable that the finished product is processed in a general T & G shape in consideration of the ease of assembly, but in an integrated mechanical fixing system, for example, a click construction structure, a connector, which is combined in a vertical or horizontal direction. It may have a connection structure.

The manufacturing process of the floor covering according to an embodiment of the present invention comprises a first step of forming the transfer printing reinforcing layer 20 by integrating the transfer printing layer 21 and the impregnated paper reinforcing layer 22; A second step of adhering the transfer printing reinforcement layer 20 on the plywood layer 30; A third step of forming a surface coating layer including a surface primer layer, a lower coat layer, a middle coat layer, and a top coat layer on the transfer printing layer 21; It is divided into four processes including the fourth process of cutting and shape processing.

In the first step, the transfer printing reinforcement layer 20 is manufactured in the order of the impregnated paper reinforcement layer 22 and the transfer printing layer 21, and then 20 to 200 kg / cm 2 at a temperature condition of 110 to 180 ° C. in a hot press. It is preferable to heat and pressurize at the pressure of 15 to 30 minutes, and to cool for 15 to 30 minutes under the same pressure. If the working temperature is too low, hardening of the impregnated paper reinforcement layer may not be completely completed, which may cause expansion, swelling and peeling due to moisture infiltration in the finished product state. If the working temperature is too high, the color of the product may be deformed by heat.

The adhesive constituting the adhesive layer 30 in the second process may be a thermosetting melamine resin, a thermosetting or room temperature curing urethane or an epoxy resin, polyvinyl alcohol, polyvinylacetate, and the like, and a room temperature curing resin is preferable.

At this time, in the case of the thermosetting melamine resin, the adhesive layer 30 is formed by applying the coating amount to the upper portion of the plywood layer 40 at 100 to 200 g / m 2, and in the case of thermosetting or room temperature urethane or epoxy resin, the plywood layer 40 A coating amount is applied at 100-150 g / m 2 on the upper portion to form an adhesive layer 30. Then, the transfer printing reinforcement layer 20 is laminated, and in the thermosetting type, the thermosetting is completed by pressing for 1 to 3 minutes at a pressure of 10 to 15 kgf / cm 2, and in the case of room temperature curing type, the curing is completed at a pressure of 10 to 15 kgf / cm 2 for one day. When pressed, the adhesion is completed.

In the third step, the surface coating layer 10 is formed on the transfer printing layer 21 of the semi-finished product manufactured by the method. Surface coating treatment is carried out by the ultraviolet curing method of the general floorboard process, it is coated on the transfer printing layer 21 in the order of the surface primer layer, the undercoat layer, the intermediate layer and the top coat layer and cured.

In order to increase the impact resistance and tack resistance of the surface, the oily or aqueous monomer and the low molecular weight oligomer are cured at 80 to 150 ° C. to form a surface primer layer, so that the paint can be more easily coated on the printing layer, At this time, it is preferable to cure after 10 seconds to 4 minutes.

Inorganic substances such as ceramics and glass chop may be added to the undercoat and the intermediate layer, and the amount is preferably 0.1 to 10 wt%. And in order to improve the scratch resistance of the floor surface material, at least one selected from inorganic minerals such as clay minerals, ceramics, silica, or nano-inorganic materials can be added to the top coat layer, urethane acrylate resin so as not to affect the transparency It is preferable to fully disperse | distribute in 100 weight part in the range of 0.1-10 weight part.

In the fourth step, it is preferable to fabricate the four sides in the longitudinal and width directions of the flooring material into two parts of the tongue and two parts of the groove to have the appearance of the flooring material, such as a system using a click system or a connector. Or it can be machined into an integrated mechanical fixation system in the form of horizontal coupling.

According to another exemplary embodiment of the present disclosure, a manufacturing process of a floor covering includes: a first process of forming a transfer printing reinforcing layer 20 by integrating a transfer printing layer 21 and a synthetic resin sheet reinforcing layer 22 '; A second step of adhering the transfer printing reinforcement layer 20 on the plywood layer 30; A third process of treating the surface coating layer 10 on the transfer printing layer 21; It is divided into four processes including the fourth process of cutting and shape processing.

In the first step, the transfer printing reinforcement layer 20 may be manufactured by laminating the synthetic resin sheet reinforcement layer 22 ′ and the transfer printing layer 21 from below, and then 20 to 200 kg / at a temperature condition of 80 to 150 ° C. in a hot press. It is preferable to heat and pressurize for 1 to 5 minutes at the pressure of cm <2>, and to cool for 15 to 30 minutes under the same pressure.

Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are only for illustrating the present invention, and the present invention is not limited to the following examples.

Example 1

After the transfer printing layer 21 was laminated on the impregnated paper reinforcing layer 22, the transfer printing reinforcing layer 20 was formed by integrating by thermal pressure. After applying the adhesive layer 30 on the plywood layer 40, the transfer printing reinforcement layer 20 is laminated and bonded, and then the surface coating layer 10 is formed on the cutting and shape processing in the form of T & G A flooring material having a transfer printing reinforcement layer 20 and a plywood layer 40 as in Example 1 was prepared.

At this time, the impregnated paper reinforcing layer 22 was impregnated with a white kraft paper having a basis weight of 100 g / ㎡ 43% with melamine or phenol resin and then dried and semi-cured in an 80 to 150 ℃ oven for 0.5 to 3 minutes. General purpose PET paper was used as a transfer printing paper, and the thermal pressure condition for integrating the transfer printing reinforcing layer 20 was heated and pressed for 15 to 30 minutes at a pressure of 20 to 200 kg / cm 2 at a temperature of 110 to 180 ° C. in a press, and then It was integrated by cooling for 30 minutes simultaneously under pressure.

As the plywood layer 40, a water-resistant plywood having a density of 0.6 g / cm 3 or more, a water content of 8.0 to 10.0%, and a thickness of 7.0 to 7.5 mm was used. In the case of thermosetting melamine resin, the coating amount is applied to 150g / m 2 on the plywood layer 40 to form the adhesive layer 30, and in the case of thermosetting or room temperature urethane or epoxy resin, the coating amount is coated to 130g / m 2. After the layer 40 was formed, the transfer printing reinforcement layer 20 was laminated thereon, and the thermosetting type was cured after hot pressing for 2 to 3 minutes at a pressure of 10 to 15 kgf / cm 2, and 15 kgf for the room temperature curing type. Adhesion was carried out by pressing for one day at a pressure of / cm 2.

The transfer printing layer 21 was coated in the order of the surface primer layer, the lower layer and the middle layer, and the lower layer was added with 5 wt% ceramic. After cutting using a tenoner to have a width of 85 to 95 mm and a length of 850 to 950 mm, performing T & G processing on the side, and finally, a finished product was coated by coating a top coat layer containing 5% by weight of nano-inorganic materials. .

Example 2

A flooring material having a transfer printing reinforcement layer 20 and a plywood layer 40 as shown in FIG. 2 was prepared. After the transfer printing layer 21 was laminated on the synthetic resin sheet reinforcing layer 22 ', the transfer printing reinforcing layer 20 was formed by integrating by thermal pressure. Synthetic resin sheet reinforcing layer (22 ') was prepared by the conventional calender method was composed of 100 parts by weight of PETG, 30 parts by weight of EVA, 3 parts by weight of the processing agent. The thermal pressure condition for integrating the transfer printing reinforcement layer 20 was heated and pressed for 1 to 5 minutes at a pressure of 20 to 200 kg / cm 2 at a temperature of 80 to 150 ° C., and then cooled and integrated for 30 minutes under the same pressure.

Comparative Example 1

The plywood floor is manufactured by laminating natural veneer on top of water-resistant plywood and UV curing surface coating.

Comparative Example 2

A high-density fiberboard (HDF) is used as a base, and a melamine resin is laminated on the surface layer to prepare a reinforced floor.

[Test Example]

The physical properties of the flooring materials of Examples 1 and 2 and Comparative Examples 1 and 2 were compared, and the results are shown in Table 1.

division Photographing Fragility Dimensional stability,% scratch Absorption Thickness Expansion Rate heating Immersion U type M type L W L W Example 1 20 cm 50 cm -0.14 -0.16 0.05 0.19 5 N 2.0% 4% Example 2 20 cm 50 cm -0.15 -0.17 0.06 0.20 5 N 1.5% 3% Comparative Example 1 10 cm 15 cm -0.15 -0.18 0.05 0.19 1.5 N 2.0% 5% Comparative Example 2 20 cm 40 cm -0.26 -0.32 0.10 0.20 4 N 2.5% 50%

The surface peelability of the test items in Table 1 is a measure of the drop height at which the surface damage occurs when a flat-blade screwdriver weighing 110 g falls freely on the surface of the flooring material (at 45 degrees from the horizontal plane). According to the measurement results of Table 1, in the case of conventional plywood ondol flooring (Comparative Example 1), when the flat driver at 10cm height and 20cm height in the case of reinforcement floor, the marks were generated on the surface during free fall, In the flooring material (Example 1, Example 2), the marking mark generate | occur | produced in the height of 20 cm.

The surface crackability of the test items in Table 1 measured the drop height at which the surface was broken when freely dropping an iron ball having a diameter of 3 cm and a weight of 286 g perpendicular to the surface of the flooring material to be measured. According to the measurement results of Table 1, in the case of conventional plywood ondol floor (Comparative Example 1) and reinforced floor (Comparative Example 2), the surface cracking occurred from the height of 15 cm and 40 cm, respectively, during free fall of the iron ball, In the flooring material (Example 1, Example 2) of this invention, the surface cracking generate | occur | produced from dropping an iron ball at 50 cm height.

The dimensional stability of the test items in Table 1 is to measure the dimensional change rate of the length (L) and width (W) after leaving the flooring material to be measured in an 80 ℃ heating oven and a water bath for 24 hours. According to the measurement results of Table 1, the dimensional stability of the flooring flooring of the present invention was similar to the plywood ondol floor, but was significantly superior to the reinforced floor.

The scratchability in the test items of Table 1 was measured by the method of Clause 3.15 of KS M3332 using the Clemens type scratch hardness tester. According to the measurement results of Table 1, the scratch resistance (5.0 N) of the flooring flooring of the present invention was better than the plywood ondol floor (1.5 N) and reinforced floor (4.0 N).

Absorption thickness expansion rate in the test items of Table 1 was measured for 24 hours (type U, type 6.9 of KS F3200), and for 2 hours (type M) in 70 ℃ hot water to measure the thickness change rate. According to the measurement results of Table 1, the absorption thickness expansion rate of the floor covering of the present invention is equal to or higher than the conventional plywood ondol floor, but the M-type absorption thickness expansion rate (Example 1: 4%, Example 2: 3%) is It was much better than the existing reinforced floor (50%).

Warp (bending) stability was compared for the flooring materials of Examples 1 and 2 and Comparative Examples 1 and 2, and the results are shown in Table 2.

division Warp stability W (width), mm L (length), mm Example 1 0.13 1.08 Example 2 0.15 1.23 Comparative Example 1 0.25 7.75 Comparative Example 2 0.17           1.25

The flexural stability of Table 2 is the measurement of curl and dome values after the samples were left in an 80 ± 2 ° C. oven for 24 hours. As a result of the measurement, the warpage stability in the width direction of the floor flooring material of the present invention was most excellent, and the longitudinal warping stability of the floor flooring material of the present invention (Example 1: 1.08 mm, Example 2: 1.23 mm) is the existing reinforced floor Although similar to (Comparative Example 2: 1.25 mm), it was significantly superior to plywood ondol floor (Comparative Example 1: 7.75 mm).

Inferred from the above experimental results, the flooring material of the present invention not only has excellent surface properties compared to conventional plywood ondol floors and reinforced floors against the nailing or damage of the surface by heavy or sharp objects, but also uses plywood as a substrate. In terms of dimensional stability, it showed superior physical properties compared to reinforced floor.

1 is a cross-sectional view of a floor covering according to a first embodiment of the present invention.

2 is a cross-sectional view of the floor covering according to a second embodiment of the present invention.

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

10: surface coating layer 20: transfer printing reinforcement layer

21: transfer printing layer 22: impregnated paper reinforcement layer

22 ': synthetic resin sheet reinforcement layer 30: adhesive layer

40: plywood layer

Claims (15)

A flooring material comprising a plywood layer, an adhesive layer, a reinforcing layer, a printing layer and a surface coating layer sequentially laminated.       The flooring material according to claim 1, wherein the reinforcing layer comprises an impregnated paper reinforcing layer or a synthetic resin sheet reinforcing layer. The flooring material of claim 1, further comprising a backing layer below the plywood layer. 4. The flooring material according to claim 3, wherein the back layer comprises at least one selected from papers, metal foils, ultraviolet curable surface treatment agents, thermosetting surface treatment agents, synthetic resins, waxes, silicone-based water repellents and silicone-based waterproofing agents. . The flooring material according to claim 2, wherein the impregnated paper reinforcement layer or the synthetic resin sheet reinforcement layer is integrated with the printing layer by a high pressure press. The flooring material according to claim 2, wherein the impregnated paper reinforcing layer is impregnated with white kraft paper having a basis weight of 80 to 300 g / m 2 by 40 to 50% with melamine or phenol resin. The method of claim 2, wherein the synthetic resin sheet reinforcing layer is PVC (Poly Vinyl Chloride), PE (Ploy Ethylene), PET (Ploy Ethylene Terephthalate), PETG (Ploy Ethylene Terephthalate Glycolmodified), HIPS (High Impact Polystyrene), ABS (Acrylonitrile Butadiene) Styrene, Poly Urethane (PU), Styrene Butadiene Styrene Block Copolymer (SBS), Styrene Ethylene Butadiene Styrene Block Copolymer (SEBS), Syndiotactic Poly Stylene (SPS), and Styrene Ethylene Propylene Styrene Block Copolymer (SEPS) Flooring material characterized in that at least one. The flooring material as claimed in claim 1, wherein the printing layer is a transfer printing layer transferred onto a polyethylene terephthalate (PET) transfer paper. The floor covering material of claim 1, wherein the surface coating layer comprises a surface primer layer, a lower layer, a middle layer, and a top layer, which are sequentially stacked, and wherein the bottom layer and the top layer include an inorganic material. 10. The flooring material according to claim 9, wherein the inorganic material is at least one member selected from the group consisting of ceramic, glass chop, clay and silica. The flooring material of claim 1, wherein the flooring material has a connection structure by a Tongue and Groove (T & G), a click system, or a connector. Integrating the reinforcing layer and the transfer printing layer to form a transfer printing reinforcing layer; Bonding the transfer printing reinforcement layer on the plywood layer by cold pressure bonding; Forming a surface coating layer on the transfer printed reinforcement layer; Method for producing a flooring material comprising the step of cutting and shape processing. 13. The method of claim 12, wherein the surface coating layer is formed by coating an aqueous resin on the transfer printed reinforcing layer and drying it in an oven at 50 to 160 ° C. for 30 seconds to 5 minutes. The method of claim 12, wherein the reinforcing layer comprises an impregnated paper reinforcing layer or a synthetic resin sheet reinforcing layer. The method of claim 14, wherein the transfer printing reinforcing layer is heated and pressurized the impregnated paper reinforcing layer and the transfer printing layer for 15 to 30 minutes at a pressure of 20 to 200kg / ㎠ under a heat press temperature of 110 to 180 ℃, under the same pressure It is formed by integrating under cooling conditions for 15 to 30 minutes, or the synthetic resin sheet reinforcing layer and the transfer printing layer are heated and pressurized for 1 to 5 minutes at a pressure of 20 to 200 kg / cm 2 under a thermopress press temperature condition of 80 to 150 ℃, and then Cooling under pressure for 15 to 30 minutes and then integrated to form a flooring manufacturing method.

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