Floor material with a nano hybrid UV coating layer formed thereon

Abstract

The present invention relates to a flooring material used for finishing floors of buildings, which is manufactured to have a beautiful appearance, water resistance, durability, chemical resistance, scratch resistance, and stain resistance, and is characterized by comprising a floorboard layer that forms the basic framework of the flooring material, a decorative film layer that is laminated on the upper surface of the floorboard layer and provides a beautiful appearance with various patterns and colors, and a film having a UV coating layer hybridized with nano-silica on its upper surface to provide scratch resistance and stain resistance, and a UV coating film layer that is laminated on the upper surface of the decorative film layer to form the top layer of the flooring material.

Description

Technical Field

[0001] The present invention relates to a floor material used for finishing the floor of a building and manufactured to have a beautiful appearance, water resistance, durability, chemical resistance, scratch resistance, and stain resistance. More specifically, it is formed in a plate shape and includes a floor board layer that forms the basic skeleton of the floor material, a decorative film layer laminated on the upper surface of the floor board layer to provide a beautiful appearance with various patterns and colors, and a UV coating layer in which nanosilica is hybridized on the upper surface to have scratch resistance and stain resistance. The film is characterized in that it includes a UV coating film layer laminated on the upper surface of the decorative film layer to form the uppermost layer of the floor material, and relates to a floor material formed with a nanohybrid UV coating layer.

Background Art

[0002] Recently, in order to improve the residential culture and upgrade the interior so that the entire living space has a natural wood texture, a construction method of attaching a separate floor material to the indoor floor to directly express the wood texture of the wood is generally carried out. Such floor materials are classified into reinforced floors, plywood floors, log floors, etc. according to their materials.

[0003] The reinforced floor is a floor using fiberboard or the like as a base material, which has strong abrasion resistance, durability, and stain resistance and is convenient for maintenance and management. However, due to the limitations of the decorative paper and the surface melanin laminate, the texture of the wood is slightly reduced. The reinforced floor is composed of an upper laminate layer, an intermediate base material layer, and a lower layer for blocking moisture from the bottom surface. This is made by separating and collecting fibrous substances from wood, adding a waterproof resin, and then compression molding at high temperature and high pressure using HDF (high-density fiberboard) as a base material, and the surface is strengthened with HPL (high-pressure laminate) or LPL (law-pressure laminate).

[0004] In addition, the strengthened floor can be decorated with various hues and designs depending on the type of decorative paper. However, due to the limitations of the decorative paper and surface melanin lamination, etc., the texture of the wood is slightly inferior compared to that of a solid wood floor or plywood floor.

[0005] The solid wood floor is made by directly processing natural logs into floorboards, which are classified into edge floorboards and plank floorboards according to their shapes. The solid wood floorboards with a width of 18 - 68 mm and a thickness of 8 - 25 mm are called edge floorboards, and the plank-shaped floors with a width of 75 - 175 mm and a thickness of 8 - 22 mm are called plank floorboards. Since the plank floorboards are superior in texture and pattern condition and have good impact water absorption, they are used as floor materials in classrooms, etc.

[0006] Such a solid wood floor is recognized as a top-grade floor material because of its excellent texture by using logs as they are. As materials, hardwoods such as maple, white birch, and osmanthus are mainly used. However, since most of the logs rely on imports, the price is high, the abrasion resistance is weak, the surface is easily damaged, the noise is severe, there is a risk of discoloration and scorching, the thermal conductivity is lower than that of other floors, and varnishing must be carried out periodically, so there is a problem that management is inconvenient.

[0007] On the other hand, the plywood floor uses plywood as the base material and has a surface board attached. By attaching a surface board, the texture is natural and there is little deformation due to moisture and heat. However, it has problems such as a non-strong surface like a solid wood floor, scratches, contamination, discoloration due to ultraviolet rays, and scorching.

[0008] As a prior art for flooring materials including such strengthened floors, log floors, plywood floors, etc., Korean Registered Patent Publication No. 10-1725863 discloses a laminated floor material made of a polymer board, which is manufactured by sequentially laminating laminated wood or MLH (Mixed Light Hardwood) plywood with a thickness of 0.1 to 3 mm, three laminated veneers with a thickness of 2 to 7 mm, and an HPM sheet, and then performing low-temperature hot pressing at a temperature of 50 to 100 °C and a pressure of 10 to 15 kgf / cm². The HPM sheet is formed by sequentially bonding a gravure paper, a non-woven fabric, paper, or a synthetic resin fabric with a thickness of 0.1 mm to 1 mm, and laminated wood with a thickness of 0.2 to 3 mm. Three laminated veneers with a thickness of 2 to 7 mm are provided below the HPM sheet, and laminated wood or MLH (Mixed Light Hardwood) plywood with a thickness of 0.1 to 3 mm is sequentially bonded below the three veneers.

[0009] However, the flooring material according to the prior art is vulnerable to moisture. Moisture rising from the bottom due to temperature difference penetrates, and the water penetrates into the veneer located at the bottom, causing deformation or swelling when wet. The surface scratch resistance is low, and scratches and cracks are likely to occur. In particular, for the flooring material according to the prior art, a coating layer is formed with a coating liquid to provide scratch resistance on the upper surface of the manufactured flooring material. However, due to the non-uniformity of the surface of the manufactured flooring material itself and coating non-uniformity, an uneven coating layer is formed, and there is a problem that the coating layer is easily peeled off when in contact with external objects during the use of the floor.

Summary of the Invention

Problems to be Solved by the Invention

[0010] The present invention is for improving the above-mentioned conventional problems. A flooring material in which a floor board layer, a decorative film layer, and a UV coating film layer are laminated vertically such that a film-like UV coating film layer is located at the uppermost layer so as to have aesthetic appearance, water resistance, durability, chemical resistance, scratch resistance, and stain resistance. Manufacturing method That is,Of the flooring material The bed board layer is made by mixing stone powder and a binder to enhance water resistance and durability, the aesthetic appearance is improved by a decorative film layer having various patterns and hues, and a UV coating film layer in which nanosilica is hybridized is formed on the uppermost layer of the flooring material to improve scratch resistance, surface hardness, and stain resistance, thus providing a flooring material of excellent quality. Manufacturing method It aims to provide such a product.

Means for Solving the Problems

[0011] To achieve such an object, Of the present invention a flooring material with a UV coating layer formed By the manufacturing method is , the flooring material is formed in a plate shape and composed of a bed board layer that forms the basic framework of the flooring material, a decorative film layer laminated on the upper surface of the bed board layer that provides an aesthetic appearance with various patterns and colors, and a film-shaped UV coating film layer in which nanosilica is hybridized on the upper surface to have scratch resistance and stain resistance, and the UV coating film layer is laminated on the upper surface of the decorative film layer to form the uppermost layer of the flooring material. . Further, the film-like UV coating film layer (7) is composed of a UV coating layer in which a base film layer and nanosilica are hybridized, The UV coating layer in which the nanosilica is hybridized is formed by forming a nano-hybrid UV coating layer formed by coating a UV coating liquid on the upper surface portion of the base film layer.

[0012] Also, The bed board layer is formed by mixing 80 to 90 parts by weight of stone powder and 10 to 20 parts by weight of a binder. Is preferable.

[0013] Also, The UV coating liquid is a coating liquid manufactured using a urethane acrylate resin as a base resin. The urethane acrylate resin, which is the base resin of the UV coating liquid, is composed of 400 to 520 parts by weight of polyester polyol, 280 to 350 parts by weight of isophorone diisocyanate, 520 to 630 parts by weight of 2-hydroxyethyl acrylate hybridized with nanosilica, and a predetermined amount of viscosity modifier, defoaming agent, dispersant, reaction catalyst, and slip agent. It is manufactured by adding and mixing them. The polyester polyol is manufactured by subjecting 200 to 250 parts by weight of adipic acid, 55 to 75 parts by weight of propylene glycol, 80 to 96 parts by weight of diethylene glycol, and 70 to 90 parts by weight of 1,6-hexanediol to a condensation reaction. The 2-hydroxyethyl acrylate hybridized with nanosilica is obtained by adsorbing and removing metal ions contained in an acidic silica sol with a cation exchange resin, adding and mixing an organic solvent and a silane coupling agent for hydrophobic modification treatment, removing moisture and concentrating, surface-treating with a titanate coupling agent, and then mixing with 2-hydroxyethyl acrylate. It is hybridized by coating 2-hydroxyethyl acrylate on the surface of silica sol particles.

[0014] Furthermore, the UV coating liquid is produced by adding and mixing 450 to 550 parts by weight of urethane acrylate resin as the base resin, 160 to 200 parts by weight of 1,6 - hexanediol diacrylate as the viscosity regulator, 5 to 10 parts by weight of the defoaming agent, 4 to 8 parts by weight of the dispersant, 75 to 95 parts by weight of the matting agent, 70 to 90 parts by weight of the UV initiator, 5 to 9 parts by weight of silicone acrylate as the slip agent, and 3 to 5 parts by weight of the smoothness additive.

Effects of the Invention

[0015] As described above, according to the present invention, the bed board layer, the decorative film layer, and the UV coating film layer are laminated. A method for manufacturing the floor material thus produced, the floor material manufactured by this manufacturing method The floor board layer can enhance water resistance and durability by using a floor board layer manufactured by mixing stone powder and a binder at a certain ratio, can improve the aesthetic appearance by means of a decorative film layer having various patterns and hues, and forms a UV coating film layer by adhering a UV coating film in which nanosilica is hybridized to the uppermost layer of the flooring material, thereby improving scratch resistance, surface hardness, etc. when in contact with external objects during the use of the floor, and having the effect of being able to provide a flooring material having aesthetic appearance, water resistance, durability, chemical resistance, scratch resistance, and stain resistance.

Brief Description of the Drawings

[0016]

Figure 1

Embodiments for Carrying Out the Invention

[0017] Hereinafter, the configuration of the present invention will be described in detail as follows.

[0018] The flooring material 1 according to the present invention is used for finishing the floor of a building and provides aesthetic appearance, water resistance, durability, chemical resistance, scratch resistance, and stain resistance. As shown in FIG. 1, it includes a floor board layer 2 formed in a plate shape to form the basic skeleton of the flooring material 1, a decorative film layer 6 laminated on the upper surface portion of the floor board layer 2 to provide an aesthetic appearance with various patterns and colors, and a film form having a UV coating layer in which nanosilica is hybridized on the upper surface portion to have scratch resistance and stain resistance, and a UV coating film layer 7 laminated on the upper surface portion of the decorative film layer 6 to form the uppermost layer of the flooring material 1.

[0019] The floor board layer 2 is formed in a plate shape to form the basic framework of the floor covering 1. An insertion ridge 3 is protruding from either one of the peripheral surfaces of the floor board layer 2 so that the floor board layer 2 is inserted into the floor board layer formed on another floor covering, and an insertion groove 4 into which the insertion ridge 3 is inserted is formed on the other side, so that the floor coverings are inserted into each other on a plane.

[0020] Also, the floor board layer 2 is formed to have a thickness of about 4 to 10 mm and is formed from a mixture of 70 to 90 parts by weight of stone powder and 10 to 30 parts by weight of a binder, so as to enhance water resistance and durability.

[0021] On the other hand, a sound-absorbing material layer 5 with a thickness of 1 to 2 mm made of IXPE (irradiation crosslinked polyethylene foam) material is attached to the lower surface portion of the floor board layer 2, so as to improve the sound-absorbing property of the floor covering 1 and reduce the inter-floor noise.

[0022] The decorative film layer 6 is joined to the upper surface portion of the floor board layer 2 by a lamination treatment to provide an aesthetic appearance so that the floor covering 1 has various patterns and colors. The decorative film layer 6 is printed with a wood grain pattern or the like on a film made of a synthetic resin material such as PVC to impart an aesthetic appearance like natural wood.

[0023] The UV coating film layer 7 is a film-like structure for providing scratch resistance and stain resistance to the floor covering. It is joined to the upper surface portion of the decorative film layer 6 by a lamination treatment to form the uppermost layer of the floor covering 1, and is composed of a UV coating layer in which a basic film layer and nanosilica are hybridized.

[0024] The UV coating layer hybridized with the nano-silica is formed by coating a UV coating liquid on the upper surface of the base film layer, and the UV coating liquid is a coating liquid manufactured using a urethane acrylate resin as a base resin.

[0025] The base film layer constituting the UV coating film layer 7 is preferably formed from a PVC material having a thickness of 0.08 to 0.5 mm.

[0026] Also, the UV coating liquid used for forming the UV coating layer hybridized with the nano-silica constituting the UV coating film layer 7 is a coating liquid manufactured using a urethane acrylate resin as a base resin, and is manufactured through the base resin manufacturing stage and the UV coating liquid manufacturing stage. Therefore, by applying the manufactured UV coating liquid to the upper surface of the base film layer and subjecting it to UV curing, a UV coating layer hybridized with nano-silica is formed.

[0027] The process of manufacturing the UV coating liquid and the process of forming the UV coating layer on the upper surface of the base film layer using the manufactured UV coating liquid will be described in detail step by step as follows.

[0028] 1. Base resin manufacturing stage First, the base resin manufacturing stage is a process of manufacturing a urethane acrylate resin, which is the base resin of the UV coating liquid, by adding and mixing polyester polyol, isophorone diisocyanate (IPDI), 2-hydroxyethyl acrylate hybridized with nano-silica, and other additives.

[0029] The polyester polyol is for improving the tensile strength, elongation rate and toughness of the UV coating layer, and is produced by subjecting 200 to 250 parts by weight of adipic acid, 55 to 75 parts by weight of propylene glycol, 80 to 96 parts by weight of diethylene glycol, and 70 to 90 parts by weight of 1,6 - hexanediol to a condensation reaction. 0.3 to 0.6 parts by weight of the fascat4100 product of PMC of the United States is added to and mixed with the reaction catalyst used in the condensation reaction.

[0030] To 400 to 520 parts by weight of the polyester polyol produced as described above, 280 to 350 parts by weight of isophorone diisocyanate, 520 to 630 parts by weight of 2 - hydroxyethyl acrylate hybridized with nanosilica, a predetermined amount of viscosity modifier, defoaming agent, dispersant, reaction catalyst and slip agent are added and mixed to produce a urethane acrylate resin which is a base resin.

[0031] On the other hand, 400 to 520 parts by weight of the polyester polyol is added and mixed with respect to the total weight of the urethane acrylate resin which is the base resin. Here, when the polyester polyol is added in less than 400 parts by weight, problems such as a decrease in the tensile strength, elongation rate and toughness of the UV coating layer occur, and when added in more than 520 parts by weight, problems such as over - softening of the UV coating layer occur.

[0032] The isophorone diisocyanate is an alicyclic diisocyanate compound, which is for improving the tensile strength, elongation rate and toughness of the UV coating layer, and 280 to 350 parts by weight is added and mixed with respect to the total weight of the urethane acrylate resin which is the base resin. Here, when the isophorone diisocyanate is added in less than 280 parts by weight, the urethane acrylate resin cannot be synthesized due to insufficient reactive groups, and when added in more than 350 parts by weight, problems such as inhibiting the storage safety of the urethane acrylate resin occur.

[0033] The 2-hydroxyethyl acrylate hybridized with the nano silica is an aliphatic acrylate compound, which is for improving the scratch resistance and surface hardness of the UV coating layer and expressing UV curability, and 520 to 630 parts by weight is added and mixed based on the total weight of the urethane acrylate resin which is the base resin. Here, when the 2-hydroxyethyl acrylate hybridized with the nano silica is added less than 520 parts by weight, there is a problem that the scratch resistance and durability decrease, and when it is added exceeding 630 parts by weight, there occurs a problem that the UV coating layer is likely to peel off from the base film layer.

[0034] Also, the 2-hydroxyethyl acrylate hybridized with the nano silica is

[0035] a step of adsorbing and removing metal ions contained in the acidic silica sol with a cation exchange resin,

[0036] a step of adding and mixing an organic solvent and a silane coupling agent to the silica sol from which the metal ions have been removed and performing a hydrophobic modification treatment,

[0037] a step of removing and concentrating the moisture of the silica sol subjected to the hydrophobic modification treatment and then performing a surface treatment with a titanate coupling agent,

[0038] It is manufactured by a step of mixing the surface-treated silica sol with 2-hydroxyethyl acrylate and coating and hybridizing 2-hydroxyethyl acrylate on the surface of the silica sol particles,

[0039] The 2-hydroxyethyl acrylate hybridized with the nano silica generates an effect of improving the scratch resistance and durability of the UV coating layer by the silica component.

[0040] In particular, for the acidic silica sol, nano-particles with an average particle diameter in the range of 10 to 20 nm are used.

[0041] In the production process of the urethane acrylate resin, as other additives, a predetermined amount of a viscosity modifier, an antifoaming agent, a dispersant, a reaction catalyst, and a slip agent are added and mixed.

[0042] The viscosity modifier lowers the viscosity during the reaction of polyester polyol and isophorone diisocyanate to activate stirring and reaction, improves the tensile strength, elongation rate, and hardness of the UV coating layer, and exhibits UV curability. In the present invention, as the viscosity modifier, 1,6-hexanediol diacrylate is added and mixed in an amount of 100 to 150 parts by weight based on the total weight of the urethane acrylate resin. Here, if the viscosity modifier is added in an amount less than 100 parts by weight, the viscosity is too high and the isocyanate modification reaction and acrylate modification reaction do not proceed normally, and the elongation rate and toughness of the UV coating layer decrease. If it is added in an amount exceeding 150 parts by weight, the problem that the UV coating layer becomes overly soft and cannot be used occurs.

[0043] The antifoaming agent is used to remove bubbles generated during stirring and reaction, and 0.007 to 0.01 part by weight is added based on the total weight of the urethane acrylate resin. The dispersant is added in an amount of 0.3 to 0.6 part by weight based on the total weight of the urethane acrylate resin.

[0044] As the isocyanate reaction catalyst, dibutyltin dilaurate is added and mixed in an amount of 0.2 to 0.4 part by weight based on the total weight of the urethane acrylate resin.

[0045] The slip agent is for improving the stain resistance of the UV coating layer, and 0.4 to 0.6 parts by weight of silicon acrylate as the slip agent is added and mixed based on the total weight of the urethane acrylate resin.

[0046] Also, in the manufacturing process of the urethane acrylate resin, 4 to 6 parts by weight of an organic solvent such as normal methanol is added to remove unreacted residual isocyanate, thereby stabilizing the urethane acrylate resin.

[0047] The specific manufacturing process of the urethane acrylate resin as the base resin is as follows.

[0048] First, 200 to 250 parts by weight of adipic acid, 55 to 75 parts by weight of propylene glycol, 80 to 96 parts by weight of diethylene glycol, 70 to 90 parts by weight of 1,6 - hexanediol, and 0.3 to 0.6 parts by weight of a polyester polyol reaction catalyst are charged into a reaction vessel, heated at 140 to 150 °C for 1 to 2 hours, then the temperature is raised to 200 to 220 °C and heated for 4 to 6 hours, and a dehydration reaction is carried out at 110 to 130 °C for 1.5 to 2.5 hours to produce polyester polyol by a condensation reaction.

[0049] Next, after adding 100 to 150 parts by weight of 1,6 - hexanediol diacrylate as a viscosity regulator to 400 to 520 parts by weight of polyester polyol at room temperature, 280 to 350 parts by weight of isophorone diisocyanate, 0.007 to 0.01 parts by weight of an antifoaming agent, and 0.3 to 0.6 parts by weight of a dispersant are added and stirred and mixed. Then, 0.2 to 0.4 parts by weight of dibutyltin dilaurate is added as an isocyanate reaction catalyst, and an isocyanate modification reaction is carried out for 1.5 to 2.5 hours. After that, 520 to 630 parts by weight of 2 - hydroxyethyl acrylate hybridized with nanosilica, 0.4 to 0.6 parts by weight of silicone acrylate as a slip agent, and 4 to 6 parts by weight of methanol as an organic solvent are added and mixed, and a urethane acrylate resin is produced by an acrylate modification reaction for 1 to 2 hours. The produced urethane acrylate resin is used as the base resin of the UV coating liquid.

[0050] 2. UV Coating Liquid Manufacturing Stage To the urethane acrylate resin, which is the base resin produced in the base resin manufacturing stage, a viscosity regulator, an antifoaming agent, a dispersant, a matting agent, a UV initiator, a slip agent, and a leveling agent are added and mixed in predetermined amounts to produce a UV coating liquid.

[0051] The UV coating liquid is produced by adding and mixing 450 to 550 parts by weight of urethane acrylate resin as the base resin, 160 to 200 parts by weight of 1,6 - hexanediol diacrylate as a viscosity regulator, 5 to 10 parts by weight of an antifoaming agent, 4 to 8 parts by weight of a dispersant, 75 to 95 parts by weight of a matting agent for removing surface gloss, 70 to 90 parts by weight of a UV initiator for ultraviolet curing, 5 to 9 parts by weight of silicone acrylate as a slip agent for improving the stain resistance of the surface, and 3 to 5 parts by weight of a leveling agent for improving the smoothness of the UV coating liquid.

[0052] In addition, if necessary, the UV coating liquid can further improve the toughness of the UV coating layer by adding and mixing 30 to 40 parts by weight of polyethylene glycol diacrylate.

[0053] 3. UV Coating Layer Formation Stage Apply the UV coating liquid to the upper surface of the basic film layer made of PVC material with a thickness of approximately 10 to 30 μm, and irradiate with ultraviolet rays for UV curing to form a UV coating layer hybridized with nanosilica.

[0054] Thus, a prototype of the floor material 1 formed with the nano hybrid UV coating layer manufactured according to the present invention was produced, and the water resistance, chemical resistance, heat resistance, stain resistance, abrasion resistance, and scratch resistance were measured respectively. Here, each test was measured using 3 identical prototypes for each test, and each test was carried out by entrusting the Korea Institute of Construction Living Environment Test.

[0055] (1) Water Resistance Test Measure the weight of each prototype before drying and after drying for 24 hours to obtain the moisture content, immerse each prototype in water at 20°C for 24 hours, and measure the thickness change before and after immersion to obtain the absorption thickness expansion rate.

[0056] (2) Chemical Resistance Test After immersing each prototype in acetic acid with a concentration of 5% for 6 hours, wash with water, dry for 24 hours, observe the deformation to test the acid resistance, after immersing each prototype in sodium carbonate with a concentration of 1% for 6 hours, wash with water, dry for 24 hours, observe the deformation to test the alkali resistance, and after immersing each prototype in ordinary thinner for 6 hours, wash with water, dry for 24 hours, observe the deformation to test the thinner resistance.

[0057] (3) Heat Resistance Test Put each prototype into the inside of a heating container, maintain at 80 ± 13°C for 2 hours, and then repeat the process of cooling at room temperature for 2 hours 4 times to test the heat resistance.

[0058] (4) Stain Resistance Test After applying 10 mm of black ink, red ink, blue ink, and Crepas on the surface of each prototype, after 4 hours had passed, the surface was wiped with a wet towel, and then it was visually observed whether ink remained on the surface.

[0059] (5) Abrasion resistance test The surface abrasion resistance of each prototype was measured using a Taber’s Abration Resistance Test.

[0060] (6) Scratch resistance Using a Clemens scratch hardness tester for each prototype, a predetermined load was placed on the needle, and while gradually increasing the load, the minimum load at which scratches or damage occurred on the coating surface was measured.

[0061] (7) Test results

Table 1

[0062] From the test results in Table 1 above, it can be seen that the floor material 1 according to the present invention has an average moisture content of 0.43% and an absorption thickness expansion rate of 0.23%. It has a low moisture content and absorption thickness expansion rate and is excellent in water resistance. From the test results of acid resistance, alkali resistance, and thinner resistance, and no abnormalities occurred in the prototypes, it can be seen that it is excellent in chemical resistance.

[0063] Also, from the test results of heat resistance and stain resistance, it can be seen that there are no abnormalities in the prototypes and they are excellent in heat resistance and stain resistance. Especially in the case of abrasion resistance, the wear value and wear amount are 0, and the scratch resistance shows a low value of 3 N. Therefore, the UV coating layer hybridized with nanosilica that forms the top surface layer of the floor material 1 of the present invention exhibits high surface hardness, toughness, tensile strength, etc., and it can be seen that it is excellent in scratch resistance and abrasion resistance.

[0064] In the above, embodiments of the present invention have been described. However, the scope of rights of the present invention is not limited thereto, and includes all changes and modifications that can be easily changed by those having ordinary knowledge in the technical field to which the present invention belongs from the embodiments of the present invention and are recognized as equivalent ones.

Industrial Applicability

[0065] As described above, according to the present invention, there is provided a flooring material in which a floor board layer, a decorative film layer, and a UV coating film layer are laminated. Here, the floor board layer can enhance water resistance and durability by using a floor board layer manufactured by mixing stone powder and a binder in a predetermined ratio, and can improve the aesthetic appearance by a decorative film layer having various patterns and hues. By forming a UV coating film layer in which nanosilica is hybridized and attaching the UV coating film to the uppermost layer of the flooring material, when in contact with an external object due to the use of the floor, scratch resistance and surface hardness can be improved, and there is an effect of providing a flooring material having aesthetic appearance, water resistance, durability, chemical resistance, scratch resistance, and stain resistance, so the industrial applicability is also high.

Explanation of Reference Numerals

[0066] 1 Flooring material 2 Floor board layer 3 Insertion ridge 4 Insertion groove 5 Sound-absorbing material layer 6 Decorative film layer 7 UV coating film layer

Claims

Claim 1: A floorboard layer (2) formed in a plate shape and forming the basic framework of the flooring material (1), a decorative film layer (6) laminated on the upper surface of the floorboard layer (2) and providing an aesthetic appearance with various patterns and colors, a method for manufacturing a flooring material with a UV coating layer formed thereon, comprising a film-shaped UV coating film layer (7) laminated on the upper surface of the decorative film layer (6) to form the uppermost layer of the flooring material (1), the UV coating film layer (7) having a film form in which a UV coating layer hybridized with nanosilica is formed on the upper surface to have scratch resistance and stain resistance, wherein the film-shaped UV coating film layer (7) is composed of a UV coating layer in which a basic film layer and nanosilica are hybridized, the UV coating layer hybridized with nanosilica is formed by coating a UV coating liquid on the upper surface of the basic film layer to form a nano hybrid UV coating layer, the UV coating liquid is a coating liquid manufactured using a urethane acrylate resin as a base resin, the urethane acrylate resin, which is the base resin of the UV coating liquid, is manufactured by adding and mixing 400 to 520 parts by weight of polyester polyol, 280 to 350 parts by weight of isophorone diisocyanate, 520 to 630 parts by weight of 2-hydroxyethyl acrylate hybridized with nanosilica, and a predetermined amount of a viscosity regulator, defoaming agent, dispersant, reaction catalyst, and slip agent, the polyester polyol is manufactured by subjecting 200 to 250 parts by weight of adipic acid, 55 to 75 parts by weight of propylene glycol, 80 to 96 parts by weight of diethylene glycol, and 70 to 90 parts by weight of 1,6-hexanediol to a condensation reaction, The 2-hydroxyethyl acrylate hybridized with the nano-silica is obtained by adsorbing and removing metal ions contained in an acidic silica sol with a cation exchange resin, adding and mixing an organic solvent and a silane coupling agent for hydrophobic modification treatment, removing moisture and concentrating, then surface-treating with a titanate coupling agent, mixing with 2-hydroxyethyl acrylate, and hybridizing by coating 2-hydroxyethyl acrylate on the surface of silica sol particles. The UV coating solution is produced by adding and mixing 450 to 550 parts by weight of urethane acrylate resin as a base resin, 160 to 200 parts by weight of 1,6-hexanediol diacrylate as a viscosity regulator, 5 to 10 parts by weight of an antifoaming agent, 4 to 8 parts by weight of a dispersant, 75 to 95 parts by weight of a matting agent, 70 to 90 parts by weight of a UV initiator, 5 to 9 parts by weight of silicon acrylate as a slip agent, and 3 to 5 parts by weight of a smoothness additive. A method for manufacturing a floor material formed with a nano hybrid UV coating layer, characterized by the above.

2. The method for manufacturing a floor material formed with a nano hybrid UV coating layer according to Claim 1, wherein the floor board layer (2) is formed by mixing 70 to 90 parts by weight of stone powder and 10 to 30 parts by weight of a binder.

3. The method for manufacturing a floor material formed with a nano hybrid UV coating layer according to Claim 1 or 2, wherein the floor board layer (2) has an IXPE material sound-absorbing layer (5) with a thickness of 1 to 2 mm attached to the lower surface portion.

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