KR100918559B1 - Interior product having transfer-printed base layer and process for preparing the same - Google Patents

Abstract

The present invention relates to an interior material to which a transfer printing technique is applied, and a method of manufacturing the same, wherein an aqueous primer layer is formed on a core layer as a core layer and transfer printing is performed on the primer layer, thereby providing adhesion between the substrate layer and the printing layer. It provides an interior material with various and sophisticated surface image effects.

The interior material of the present invention can be composed of the surface layer at a lower cost than the interior material using the veneer on the surface layer by performing direct transfer printing on the base material layer, there is little difference between the products, pattern veneer burst, dead knots, surface defects such as knife marks There is no, the natural sense is better than the conventional reinforced floor products can achieve the desired color and pattern, and excellent physical properties such as dimensional stability.

Primer, Transfer Printing, Interior Material

Description

Interior product having transfer-printed base layer and process for preparing the same}

The present invention relates to an interior material in which transfer printing is performed on a base material layer, and a method of manufacturing the same. More specifically, an aqueous primer layer is formed on an upper portion of a base material layer, and transfer printing is performed on the base material layer, thereby providing The adhesive strength is enhanced, and can realize a variety of sophisticated surface image effects, and relates to interior materials excellent in physical properties such as dimensional stability.

In general, flooring material, one of the main interior materials, is divided into plywood floor and reinforced floor depending on the materials, and the adhesive flooring and click (T & G (Tongue & Groove) processing according to the construction method (adhesive agent) is used). Click) It can be divided into non-adhesive flooring processed.

Plywood (ondol) flooring is usually used veneer of 0.3 to 0.8 mm, especially when using a single plate of 2 mm or more is called wood flooring, melamine impregnated paper (LPM, HPM) is applied to the reinforced floor.

Melamine impregnated paper used for reinforced floor refers to a sheet made of gravure printing on paper in order to show a wood pattern, and then made of shape paper and impregnated with melamine resin. LPM and HPM are classified according to the pressure applied during manufacturing and whether adhesive is used.

Ondol parquet flooring manufactured by laminating natural veneer on the conventional water-resistant plywood and surface-coating treatment maximizes the natural texture of the wood and uses the waterproof plywood layer to provide excellent dimensional stability against heat and moisture. Low scratch resistance (0.5 to 3.0 N in diamond chip test) and low resistance even when UV coating on the surface because of its low density and low density (0.6 to 0.8 g / cm 3) of the plywood itself. Impact properties (10 to 20 cm in the free fall test of a 225 g metal ball), which is commonly used by users when inadvertently dropping household items or moving heavy objects, causing damage to the floor surface. It is also low and causes energy loss. In addition, because the veneer is a natural material, the price is not only expensive, but due to the nature of the veneer, there are many different colors between the products, and surface defects such as bursting of veneer, dead knots, gum, and knife marks occur.

On the other hand, the reinforced flooring material manufactured by laminating the printing layer and the melamine impregnated overlay sheet on the upper part of the high-density fiberboard (HDF) layer, which is the base material layer, and the balance layer on the lower part, has a stronger surface than the water-resistant plywood ondol flooring material, but the thermosetting melamine resin Because it is used as a surface material, it is sensitive to moisture and its surface has very brittle characteristics, which gives the user a cold feeling, and when the sharp or heavy object falls below a certain load, the impact part is broken or picked up. In addition to the disadvantages of breakage, water-resistant heat-resistant dimensional stability and water-thickness expansion rate is worse than that of water-resistant plywood ondol flooring that uses plywood made of orthogonal bonds of several sheets as cores.

The surface, expressed in artificial printing form, is somewhat inferior to the natural texture of solid wood compared to the flooring of plywood ondol floor.

The present invention has been made to solve the problems of the conventional interior materials described above, an object of the present invention is to form an aqueous primer layer on the substrate layer and transfer printing on the primer layer, the adhesion between the substrate layer and the printing layer This enhanced, low-cost and versatile surface image can be displayed, and to provide an interior material with excellent properties such as dimensional stability.

Another object of the present invention is to improve the surface properties such as scratch resistance, scratch resistance by adding glass pieces, ceramics, nano-inorganic materials, silica, etc. to the surface coating layer, so that heavy, sharp objects such as stamping, cracking, scratches, etc. It is to provide an interior material that can prevent surface damage.

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

In order to achieve the above object, the present invention provides an interior material including a base material layer, a primer layer, and a printing layer as described below.

The interior materials of the present invention can be used for flooring materials, wall panels, louvers, ceiling materials and the like.

According to one embodiment of the invention, the substrate layer may be plywood. When plywood is used as the base layer, transfer printing is directly performed on the plywood, so that it is cheaper than solid wood flooring and general flooring, and there is less discoloration between products, and surface defects such as patterned wood, dead knots and knife marks are eliminated. There is no advantage. In addition, compared to the reinforced floor manufactured by laminating the printing layer and the melamine impregnated overlay sheet on the high-density fiber board base layer, the greatest advantage is that it has excellent physical properties such as water resistance / heat resistance, dimensional stability, water thickness expansion ratio, etc. It is embodied in the natural beauty of wood with the surface embodied with sophisticated transcription printing.

According to another embodiment of the present invention, the substrate layer may be a composite substrate formed by stacking two or more kinds of wood materials. By forming an aqueous primer layer on the composite substrate and performing transfer printing on the primer layer, it is possible to achieve a natural feeling and obtain a desired color and pattern than conventional reinforced floor products, and to apply a composite substrate to a high density fiber board (HDF). Excellent water resistance (dimension stability, absorption thickness expansion ratio) can be secured. In addition, the high density fiberboard is not exposed on the back side, and a veneer, which is a part of the composite base material, is exposed to improve water resistance and has a beautiful appearance of wood.

According to another embodiment of the present invention, the base layer is solid wood, veneer, particleboard, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), HPL (High Pressure Laminate), LPL (Low Pressure Laminate), OSB ( Oriented Strand Board, Flake board (Flake board), Kenaf Board (Kenaf Board) may be made of one or more selected from cardboard, paper.

In order to improve the strength of the surface layer in the present invention, a reinforcing layer may be configured between the primer layer and the base layer, and paper or synthetic resin sheets may be used as the reinforcing layer.

In the present invention, the wood material used when the base layer is composed of a composite material is at least two selected from solid wood, veneer, particle board, MDF, HDF, HPL, LPL, OSB, flake board, yam board, cardboard, and paper. .

In the present invention, the composite substrate is composed of two or more layers of wood materials laminated, for example, a structure consisting of a single plate, a fiber plate, and a single plate from the first place, a structure consisting of a single plate and a fiber plate from the second place, and a horse board from the third place. The structure consisting of a fiber board, a sheath board, the structure which consists of a single board, a plywood, and a single board from a fourth top, the structure which consists of a fifth fiber board, a single board, a fiber board, a single board, and a fiber board is possible.

Among the composite substrates, the veneer veneers, HDF, and veneer veneers are most preferable because the price is lower than that of the plywood, but the physical properties are close to those of the plywood.

According to another embodiment of the present invention, the substrate layer may be an inorganic board or a synthetic resin panel.

In case of using inorganic board or synthetic resin panel as base material layer, various mechanical properties or surface strength can be improved by high density, and there are few dimensional change and deformation of board shape due to moisture, and high thermal conductivity when used as flooring material. There is an advantage in reducing heating costs. In addition, the use of an inorganic board as the base layer will have a flame retardant performance.

In the present invention, the back layer may be formed for structural stability of the interior material. The back layer may be coated with paper, metal foil, UV curable surface treatment agent, thermosetting surface treatment agent, synthetic resin, wax, silicone water repellent, silicone waterproof agent, or the like. It is formed. By forming the back layer on the back surface of the substrate layer, it is possible to solve the deformation problem caused by the change in humidity.

In the present invention, the primer layer is preferably composed of an aqueous resin to consider environmental pollution and improve productivity and workability. As the aqueous resin, acrylic urethane, epoxy, polyurethane, polyisocyanate, polyester, acrylate, ethylene-vinyl acetate copolymer, polyamide, melamine, synthetic rubber, polyvinyl alcohol resin, and the like are used. Possible, in particular aqueous acrylic urethane resins.

In the present invention, the primer layer is preferably made of a two-component resin containing an aqueous acrylic urethane (30 to 70% by weight), it is preferable to add 1 to 40% by weight of the inorganic pigment to conceal the base pattern of the substrate. Do.

The primer layer of the above composition has the effect of increasing the adhesion between the base layer and the transfer printing layer, and enhances the water resistance of the finished product, which is one of the important properties of the interior material.

In the present invention, the printing layer is a transfer printing layer printed using a general purpose polyethylene terephthalate (PET) transfer paper.

In the present invention, the surface coating layer is composed of a surface primer layer, a lower coat layer, a middle coat layer and a top coat layer, using an aqueous acrylic of 100,000 to 200,000 molecular weight for the primer layer, and ceramic, glass chop for the lower coat and the top coat layer ), Clay, silica, and the like are added to improve surface properties such as scratch resistance, thereby preventing surface damage such as chipping, cracking, and scratching by heavy or sharp objects.

The interior materials of the present invention finally have a connection structure by means of T & G (Tongue and Groove), a click system, or a connector so as to be mutually coupled.

In addition, the present invention comprises the steps of preparing a substrate layer; Forming a primer layer on the substrate layer; Performing transfer printing on the primer layer by thermal pressure to form a transfer printing layer; Forming a surface coating layer including a surface primer layer, a lower layer, a middle layer, and a top coat layer on the transfer printing layer; It provides a method of manufacturing the interior material comprising the step of cutting and shape processing.

In the step of forming a primer layer on the base layer according to the present invention, it is preferable to coat the aqueous resin with a constant thickness, and then dry and cure by passing in an oven at 50 to 160 ° C. for 30 seconds to 5 minutes.

In the present invention, the transfer printing is preferably carried out under the conditions of temperature 80 to 130 ℃, pressure 0.4 to 1.0 MPa, time 5 seconds to 2 minutes in consideration of preventing deformation of the product and improving productivity.

As described above, the present invention forms a primer layer using an aqueous acrylic urethane or the like on the substrate, and transfer printing on the primer layer to not only conceal the underlying fiber texture of the substrate, but also enhance the adhesion between the substrate layer and the printing layer. It can produce a variety of sophisticated surface image effects.

In addition, the interior material of the present invention is to significantly improve the surface properties such as scratch resistance, scratch resistance by selecting and adding inorganic materials such as glass chop, ceramic, clay, silica (silica) to the surface coating layer In particular, it is possible to realize the natural beauty of wood by forming a transfer printing layer directly on the base layer, and there is little difference in color between products, and there are no surface defects such as pattern bursting, dead knots, knife marks, and surface layer of existing interior materials. Cost increase due to the use of materials is minimized.

In addition, the interior material of the present invention can achieve the desired color and pattern than the LPM, which is the surface material of the reinforced floor, to obtain the desired color and pattern, and when applying the composite material, it is possible to secure stable basic properties (dimension stability, absorption thickness expansion ratio) compared to HDF. It is possible.

At present, color matching is a major issue in line with the needs of the construction company, a major customer of the major flooring materials, and it is possible to produce products with various designs in response to these needs by implementing various colors and patterns by transcription printing. In addition, the application of composite materials can improve the water resistance (dimension stability, absorption thickness expansion rate), which is pointed out as a disadvantage of HDF, and ultimately induce differentiation from other products.

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

1 is a cross-sectional view of an interior material according to a first embodiment of the present invention, which is composed of a surface coating layer 10, a transfer printing layer 20, a primer layer 30, and a base material layer 40 from above. have.

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

The surface primer layer is formed by ultraviolet curing the monomers and oligomers having a relatively low molecular weight in order to increase the impact resistance and tack resistance of the surface, so that the coating may be more easily coated. It is preferable.

In order to increase the surface properties, an inorganic material such as glass chop may be added to the undercoat layer, and the amount of the coating is preferably 0.1 to 10% by weight.

Nanoinorganic materials, silica, etc. may be added to the top coat layer in order to increase scratch resistance and abrasion resistance of the surface, and the amount is preferably 0.1 to 10% by weight.

The transfer printing layer 20 is a transfer printing technology is applied to create a natural effect of the tree, according to the needs of the consumer (Oak), birch (Birch), cherry (Cherry), maple (Maple), walnut It is possible to realize the pattern of all species used as veneers such as Walnut in truth and freely. As a transfer paper, general-purpose PET transfer paper can be used.

The primer layer 30 conceals the base texture of the base material and reinforces the adhesive force between the base layer 40 and the transfer printing layer 20. In this case, the resin may be used as an aqueous resin, such as an acrylic urethane, epoxy, or poly Urethane type, polyisocyanate type, polyester type, acrylate type, ethylene-vinyl acetate copolymer, polyamide type, thermosetting melamine type, synthetic rubber type, polyvinyl alcohol type resin and the like are particularly preferable.

In general, widely used organic solvent-type resins cannot be used to cause strict regulations on volatile organic compounds (VOCs) and cause sick house syndrome.The use of aqueous resins results in zero formaldehyde dissipation and generation of volatile organic solvents. Can be prevented.

The base layer 40 may be plywood, composite materials, inorganic boards, synthetic resin panels, and the like, and solid wood, veneer board, particle board, MDF, HDF, HPL, LPL, OSB, flake board, yam board, corrugated cardboard, paper, etc. This is possible.

Plywood is preferably used having a specific gravity of 0.4 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 and higher mechanical strength than solid wood, and water / heat resistance dimensions compared to 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 interior material.

The veneer is a veneer veneer used for plywood. The veneer is usually cut to a thickness of 1.2 to 4.8 mm, but the appropriate thickness can be adjusted according to the specific structure.

Fibreboard has no orientation and is very cheap compared to plywood. MDF or HDF is used as the fiber board, and in particular, ground hard substrate (HDF) of 0.85 g / cm 3 or more is more preferable. High density fiberboard is considerably harder than medium density fiberboard (MDF) or particle board (PB), has excellent water resistance, dimensional stability and high mechanical strength, so it can improve dimensional stability, impact strength and moisture resistance when used as a base material of interior materials. have.

The high density fiberboard is inexpensive and excellent in abrasion resistance and impact resistance compared to the water-resistant plywood, and defects such as knots are eliminated, and the fibers are uniformly arranged along each direction, resulting in uniform physical properties. In addition, HDF can be easily processed, and after processing, a very smooth and smooth surface can be obtained, so that the interior material produced using the same gives the surface a smooth and soft feeling. In addition, it is possible to realize an integrated mechanical fixing system that combines interior materials in a vertical or horizontal direction, for example, a click construction structure, a connection structure by a connector, and elastically accommodates expansion and contraction forces. It can be avoided to loosen or break the bond.

2 is a cross-sectional view of the interior material according to the second embodiment of the present invention, in which the paper layer 50 is additionally laminated between the primer layer 30 and the base layer 40 in the structure of FIG.

The paper layer 50 is made of papers as a reinforcing layer for improving the strength of the surface layer, and preferably paper impregnated with synthetic resin is used.

3 is a cross-sectional view of an interior material according to a third embodiment of the present invention, in which the synthetic resin sheet layer 60 is additionally laminated between the primer layer 30 and the base layer 40 in the structure of FIG. 1.

Synthetic resin sheet layer 60 is a reinforcing layer for improving the strength of the surface layer, made of a synthetic resin sheet.

Synthetic resins used in the paper layer 50 and the synthetic resin sheet layer 60 include polyvinyl chloride (PVC), poly (ethylene), poly propylene (PP), poly ethylene terephthalate (PET), and poly ethylene terephthalate glycol. ), HIPS (High Impact Polystyrene), ABS (Acrylonitrile Butadiene Styrene), PU (Poly Urethane), SBS (Styrene Butadiene Styrene block copolymer), SEBS (Styrene Ethylene Butylene Styrene block copolymer), SPS (Syndiotactic Poly Styrene), SEPS (SEPS) Styrene ethylene propylene styrene block copolymer) may be used.

4 is a cross-sectional view of the interior material according to the fourth embodiment of the present invention, in which the base material layer is composed of a composite substrate composed of a single plate 41, a fiber plate 42, and a single plate 41 from below.

5 is a cross-sectional view of the interior material according to a fifth embodiment of the present invention. In this embodiment, the base layer is composed of a composite substrate composed of a fiber plate 42, end plate 41 from below, and the back surface waterproofing layer 70 is formed in the lower base. In this structure, in order to increase the water resistance, the surface printing treatment is performed on the transfer printing layer 20, as well as the ultraviolet curable or thermosetting surface treatment layer mainly composed of urethane acrylate on the back of the fiber plate 42, or polyolefin, By coating at least one selected from synthetic resins such as polyester, waxes, silicone-based water repellents, and silicone-based waterproofing agents, it is possible to prevent moisture from penetrating into the fiber board 42 and causing the interior material to rot or deform.

The back waterproof layer 70 is laminated under the substrate to increase the water resistance, and is formed by coating an ultraviolet curable or thermosetting surface treatment layer, or by coating synthetic resins, waxes, silicone-based water repellents, silicone-based waterproofing agents, and the like.

The interior material of the present invention is preferred that the finished product is processed in a general T & G form in consideration of the ease of assembly, but by an integrated mechanical fixing system, for example, click construction, connector It may have a connection structure.

The manufacturing process of the interior material according to the present invention comprises a first step of forming a primer layer 30 on the base layer 40; Forming a transfer printing layer on the primer layer 30; A third process of surface coating the upper portion of the transfer printing layer 20; It is divided into four processes including the fourth process of cutting and shape processing.

The drying temperature of the primer layer 30 in the first step is preferably 50 to 160 ℃. Too high a drying temperature causes severe deformation of the substrate, and too low a drying temperature may cause poor adhesion between the transfer printing layer 20 and the base layer 40 due to incomplete drying of the primer layer 30 and This may result in poor surface leveling.

In the second step, the transfer printing pressure is preferably 0.4 to 1.0 MPa. If the pressure is too high, the transfer printing layer may be broken, and if the pressure is too low, it may cause a bad printing. In addition, the transfer printing time is preferably 5 seconds to 2 minutes. If the transfer print time is too short, a print defect may occur due to incomplete transfer of the printing ink, and if the transfer print time is too long, the transfer print layer may be destroyed.

In the third step, the surface coating layer 10 is formed on the transfer printing layer 20 of the semi-finished product manufactured by the above method. Surface coating treatment is carried out by the ultraviolet curing method of the general floorboard process, the coating on the transfer printing layer 20 in the order of the surface primer, undercoat, intermediate and top coat layer is cured.

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.

In addition, 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. In this case, 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 layer, and the amount is preferably 0.1 to 10% by weight. In order to improve the scratch resistance of the interior material surface, at least one selected from inorganic or nano inorganic materials such as clay mineral, ceramic, silica, and the like may be added to the top coat layer, and the urethane acrylate resin 100 may not affect transparency. It is preferable to disperse | distribute fully in 0.1 to 10 weight part with respect to a weight part.

Figure 6 is a plan view of the finished product having a T & G shape of the interior material according to the present invention, as shown in Figure 5 the four sides in the longitudinal direction and the width direction in the machining process, two parts of the Tongue (80), Groove ( 90) It is preferable to manufacture the interior material by processing it into two parts, and it can also be processed into an integrated mechanical fixing system that is combined in a vertical or horizontal direction such as a system using a click system or a connector.

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

Plywood was used as the base material layer 40, and after the primer layer 30 was formed on the plywood, the transfer printing layer 20 was formed by thermal pressure. After forming the surface coating layer 10 on the transfer printing layer 20, and cut and shape processed in the form of T & G (80, 90) to prepare a flooring material having a transfer printing layer and a plywood layer as shown in FIG. .

At this time, the primer layer 30 was used as a two-component resin having a weight of 50% aqueous acrylic urethane, and dried by passing through an oven at 120 ° C. for 2 minutes. General purpose PET paper was used as a transfer printing paper, and transfer printing was performed by thermopressing pressure for 1 minute at a pressure of 0.7 MPa at a temperature of 100 ° C. As the base material layer 40, a water-resistant plywood having a density of 500 kg / m 3 or more, a water content of 4.0 to 7.0%, and a thickness of 7.5 to 8.0 mm was used.

The primer was coated on the transfer printing layer 20 in the order of surface primer, undercoat, and intermediate, and then coated with an undercoat added with 5 wt% of ceramic, and then a tenoner to have a width of 85 to 95 mm and a length of 850 to 950 mm. After cutting using T and G on the side, and finally, the finished product was coated by coating a top coat layer with 5% by weight of nano-inorganic materials.

Example 2

In Example 1, a one-component resin having an aqueous acrylic acid ester weight of 62% based on the primer layer 30 was used, dried for 1 minute in an oven at 120 ° C., and the finished process was prepared in the same manner.

Example 3

The lower surface waterproof layer 70 was formed by coating an ultraviolet curable coating layer on the lower portion of the composite substrate composed of the end plate 41 and the high density fiber plate 42. After the primer layer 30 was formed on the end plate 41, the transfer printing layer 20 was formed by thermal pressure. After the surface coating layer 10 was formed on the transfer printing layer 20, cutting and shape processing in the form of T & G to prepare a flooring material having a transfer printing layer and a composite substrate as shown in FIG.

At this time, the primer layer 30 was used as a two-component resin having a weight of 50% aqueous acrylic urethane, and dried by passing through an oven at 120 ° C. for 2 minutes. General purpose PET paper was used as a transfer printing paper, and transfer printing was performed by thermopressing pressure for 1 minute at a pressure of 0.7 MPa at a temperature of 100 ° C. As the composite substrate, a single plate 41 having a thickness of 1.2 mm and an HDF 42 having a density of 900 kg / m 3 or more, a water content of 4.0 to 7.0%, and a thickness of 7.5 to 8.0 mm were used.

The primer was coated on the transfer printing layer 20 in the order of surface primer, undercoat, and intermediate, and then coated with an undercoat added with 5 wt% of ceramic, and then a tenoner to have a width of 85 to 95 mm and a length of 850 to 950 mm. After cutting using T and G on the side, and finally, the finished product was coated by coating a top coat layer with 5% by weight of nano-inorganic materials.

Example 4

In Example 3, a one-component resin having an aqueous acrylic acid ester weight of 62% based on the primer layer 30 was used, and was dried by passing through an oven at 120 ° C. for 1 minute to prepare a finished product in the same manner.

Comparative Example 1

Plywood floor with natural veneer laminated on top of water-resistant plywood and UV curing surface coating

Comparative Example 2

Reinforced floor made of HDF and laminated with melamine resin on the surface layer

[Test Example 1]

The physical properties of the interior materials of Examples 1 to 4 and Comparative Examples 1 and 2 were compared, and the results are shown in Table 1 below.

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 1.5% 3% Example 2 20 cm 50 cm -0.15 -0.17 0.06 0.20 5 N 1.5% 4% Example 3 25 cm 50 cm -0.17 -0.20 0.08 0.19 5 N 2.9% 22.4% Example 4 25 cm 50 cm -0.20 -0.20 0.09 0.20 5 N 2.3% 20% Comparative Example 1 10 cm 20 cm -0.15 -0.18 0.05 0.19 3 N 7.5% 25.8% Comparative Example 2 10 cm 35 cm -0.26 -0.32 0.10 0.20 4 N 23% 138%

Surface testability of the test items in Table 1 is a measure of the drop height at which surface damage occurs when a flat-blade screwdriver with a weight of 110 g falls freely on the surface of the interior material (at 45 degrees from the horizontal plane). According to the measurement results of Table 1, in the case of the conventional reinforced floor (comparative example 2) and plywood ondol flooring (comparative example 1), while the flat-headed screwdriver marks on the surface when free-falling 10 cm in height, whereas in Example 1 and In Example 2, marks were generated at a height of 20 cm, and in Examples 3 and 4, 25 cm.

The surface cracking property of the test item of Table 1 measured the fall height which a surface breaks when freely dropping the iron hole of diameter 3cm and weight 228g perpendicular to the surface of the interior material to be measured. According to the measurement results of Table 1, in the case of the conventional reinforced floor (Comparative Example 2) and plywood ondol floor (Comparative Example 1), the surface cracks occurred from 35 cm and 20 cm high when freely falling the iron ball, respectively, In Examples 1 to 4, surface cracking occurred from dropping the iron ball at a height of 50 cm.

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 interior material to be measured for 24 hours in the 80 ℃ heating oven and room temperature bath. According to the measurement results of Table 1, the dimensional stability of the flooring flooring of the present invention is similar to the plywood ondol floor, but was much better than the existing 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 plywood ondol floor (3.0 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 was superior to the existing plywood floor and reinforced floor.

[Test Example 2]

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

division Warp stability W (width), mm L (length), mm Example 1 0.09 0.89 Example 2 0.08 0.91 Comparative Example 1 0.15 5.77 Comparative Example 2 0.17 0.96

Warp stability in Table 2 is a measure of curl and dome values after the samples were placed in an 80 ± 2 ° C. oven for 24 hours. As a result of the measurement, warp stability in the width direction of the flooring flooring of the present invention was most excellent, and longitudinal warp stability of the flooring flooring of the present invention (Example 1: 0.89 mm, Example 2: 0.91 mm) is the existing reinforced floor Similar to (Comparative Example 2: 0.96 mm) but superior to plywood ondol floor (Comparative Example 1: 5.77 mm).

Inferred from the above experimental results, the interior 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. The dimensional stability showed superior physical properties compared to reinforced floor.

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

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

3 is a cross-sectional view of the interior material according to a third embodiment of the present invention.

4 is a cross-sectional view of the interior material according to a fourth embodiment of the present invention.

5 is a cross-sectional view of the interior material according to a fifth embodiment of the present invention.

6 is a plan view of the finished product having a T & G (Tongue and Groove) form of the interior material according to the present invention.

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

10: surface coating layer

20: transfer printing layer

30: primer layer

40: substrate layer

41: single plate

42: fiberboard

50: paper layer

60: synthetic resin sheet layer

70: backside waterproofing layer

80: Tongue

90: Groove

Claims (22)

It includes a back waterproof layer, a base layer, a primer layer and a print layer from below, The primer layer is made of an aqueous resin, The back surface waterproofing layer is made of at least one selected from metal foils, ultraviolet curing surface treatment agents, thermosetting surface treatment agents, waxes, silicone-based water repellents, silicone-based waterproofing agents. The interior material according to claim 1, wherein the base material layer is plywood. The interior material according to claim 1, wherein the base material layer is a composite material obtained by laminating two or more kinds of wood materials. The interior material according to claim 1, wherein the base layer is an inorganic board or a synthetic resin panel. The method of claim 1, wherein the substrate layer is solid wood, veneer, particleboard, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), HPL (High Pressure Laminate), LPL (Low Pressure Laminate), OSB (Oriented Strand Board) Interior material, characterized in that made of one or more selected from a flake board (Flake board), a horse board (Kenaf Board), corrugated cardboard, paper. The interior material according to claim 1, further comprising a reinforcing layer between the primer layer and the base material layer. The interior material according to claim 6, wherein the reinforcing layer is made of paper or synthetic resin sheet. The wood material according to claim 3, wherein the wood material is solid wood, veneer, particle board, MDF (Medium Density Fiberboard), HDF (High Density Fiberboard), HPL (High Pressure Laminate), LPL (Low Pressure Laminate), OSB (Oriented Strand Board) Interior materials, characterized in that the flake board (Flake board), horse boards (Kenaf Board), corrugated paper, two or more selected from paper. The interior material according to claim 3, wherein the composite base material comprises a veneer, a fiberboard, and a veneer from below. The interior material according to claim 3, wherein the composite base material comprises a fiber board and a end plate from below. The interior material of claim 1, further comprising a surface coating layer on the printed layer. delete delete The resin according to claim 1, wherein the aqueous resin is acrylic urethane, epoxy, polyurethane, polyisocyanate, polyester, acrylate, ethylene-vinyl acetate copolymer, polyamide, melamine, synthetic rubber, polyvinyl alcohol Interior material characterized by at least 1 type selected from system resin. The interior material according to claim 1, wherein the primer layer is made of a two-component resin containing aqueous acrylic urethane. The interior material of claim 1 wherein the primer layer comprises 1 to 40 weight percent pigment. The interior material according to claim 1, wherein the printing layer is a transfer printing layer using general-purpose polyethylene terephthalate (PET) transfer paper. 12. The surface coating layer of claim 11, wherein the surface coating layer comprises a lower layer, a middle layer, and a top layer from below, wherein the lower layer and the top layer are formed of at least one inorganic material selected from ceramic, glass chop, clay, and silica. Interior material characterized by including. The interior material according to claim 1, wherein the interior material has a connection structure by Tongue and Groove (T & G), a click system, or a connector. Preparing a base layer; Forming a backside waterproofing layer under the substrate layer; Forming a primer layer made of an aqueous resin on the base layer; Performing transcription printing on the primer layer to form a transcription printing layer; Forming a surface coating layer on the transfer printing layer; And Cutting and shape processing, The coating method of the aqueous layer in the step of forming the primer layer and then dried in an oven at 50 to 160 ℃ for 30 seconds to 5 minutes to form a primer layer, characterized in that to form a primer layer. delete 21. The method of claim 20, wherein in the transfer printing step, the transfer printing is performed under conditions of 5 seconds to 2 minutes at a pressure of 0.4 to 1.0 MPa at a temperature of 80 to 130 ° C.

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