KR102646070B1 - Flooring materials tile - Google Patents

Abstract

The present invention relates to river floor tiles.
A steel floor tile according to an embodiment of the technical idea of the present invention includes a fiberboard 100 and a sheet layer 200 glued on top of the fiberboard 100, and the fiberboard 100 has a thickness of 1 to 5 mm. It is formed to a thickness, and a groove 110 of a certain depth and width is formed from the bottom surface of the fiber board 100, wherein the groove 110 is formed to a depth of 1 to 3 mm from the bottom of the bottom surface of the fiber board 100, and the width has a range of 1 to 10 mm.
Due to the above configuration, the steel floor tile according to various embodiments of the technical idea of the present invention has soft physical properties, is easy to construct, can prevent dimensional deformation such as shrinkage and expansion due to heat or moisture, and has abrasion resistance and impact resistance. , physical properties such as scratch resistance can be strengthened, and resistance to external shock can be improved.

Description

Kangmaru tile{FLOORING MATERIALS TILE}

The present invention relates to a steel floor tile, and more specifically, it has soft physical properties, is easy to construct, can prevent dimensional deformation such as shrinkage and expansion due to heat or moisture, and has physical properties such as abrasion resistance, impact resistance, and scratch resistance. This relates to steel floor tiles that have been strengthened and have improved resistance to external shocks.

In general, the forms of floor boards are presented in various ways by varying the mutual lamination structure of the wood boards depending on the purpose of use. For example, there are solid wood floors, plywood floors, reinforced floors, and steel floors.

Among these, steel flooring is a board material that complements the shortcomings of plywood flooring, such as poor durability and scratch resistance, and combines the advantages of plywood flooring and laminate flooring. It preserves the natural texture of wood, but provides a high-strength surface protection layer, making it relatively more durable. It is designed to be strong against external shocks and uses water-resistant plywood to reduce structural deformation due to moisture or temperature.

These steel floors are manufactured by attaching a sheet with a wood pattern printed on the surface of HDF (high density fiberboard), which is a mixture of finely ground wood and compressed under high pressure, then coating it with melamine resin and impregnating it at high temperature and pressure. It can be produced in a variety of colors, has good wear resistance and durability, causes almost no damage to the surface, is inexpensive, and does not use toxic adhesives during construction, so it has a very high market share.

In order to strengthen the advantages of steel flooring and add various functionalities, many studies have recently been reported that attempted to modify the structural and surface properties of steel flooring. In the case of various flooring materials for steel flooring with these functions added, it is simply Since most structures add functionality by applying a coating composition containing a functional material to the surface, there is a problem in that the functionality added to the floor plate is deteriorated due to continuous external shock or scratches.

Recently, in addition to adding various functions to hardwood floors, there have been various attempts to improve the physical properties of the flooring materials themselves for hardwood floors, for example, high-density fiberboard (HDF), natural veneer veneer, natural veneer sheets, or mosaic. When manufacturing a floor board in which the sheet is heat-compressed on one side of a high-density fiberboard by heat-compressing a sheet with a veneer such as veneer, it is necessary to improve the physical properties such as the shape, texture, and feel of the high-density fiberboard (HDF) or a veneer-formed sheet. There have been various attempts for this purpose.

Domestic Registered Patent No. 10-1916705 (registered on November 2, 2018) Domestic Registered Patent No. 10-1725863 (registered on April 5, 2017) Domestic registered patent No. 10-2520614 (registered on April 6, 2023)

The problem that the present invention aims to solve is that the material properties are soft, the construction is easy, and dimensional deformation such as shrinkage and expansion due to heat or moisture can be prevented. In addition, the physical properties such as abrasion resistance, impact resistance, and scratch resistance are strengthened to protect against external shocks. The goal is to provide steel floor tiles with improved resistance.

The various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In one embodiment of the technical idea of the present invention, a steel floor tile is disclosed.

The steel floor tile includes a fiberboard 100 and a sheet layer 200 glued on top of the fiberboard 100, the fiberboard 100 is formed to a thickness of 1 to 5 mm, and the bottom of the fiberboard 100 is A groove 110 of a certain depth and width is formed from the surface, and the groove 110 is formed to a depth of 1 to 3 mm from the bottom of the bottom surface of the fiber board 100, and the width ranges from 1 to 10 mm.

The fiberboard 100 may be a high-density fiberboard (HDF), and the sheet layer 200 may be a High Pressure Melamine (HPM) sheet.

A chamfered surface 120 formed by chamfering at least one of the edge portions of the steel floor tile 10 formed by adhering the sheet layer 200 and the fiber board 100 at an angle of 0.3 to 1 mm may be provided. You can.

Specific details of other embodiments are included in the detailed description.

The steel floor tiles according to various embodiments of the technical idea of the present invention have soft physical properties, are easy to construct, can prevent dimensional deformation such as shrinkage and expansion due to heat or moisture, and have abrasion resistance, impact resistance, scratch resistance, etc. As physical properties are strengthened, resistance to external shocks can be improved.

It will be fully understood that various embodiments of the technical idea of the present invention can provide various effects that are not specifically mentioned.

Figure 1 is a cross-sectional view schematically showing the cross-section of a steel floor tile according to an embodiment of the technical idea of the present invention.
Figure 2 is a photograph showing the upper surface of a steel floor tile manufactured according to an embodiment of the technical idea of the present invention.
Figure 3 is a photograph showing the lower surface of a steel floor tile manufactured according to an embodiment of the technical idea of the present invention.
Figure 4 is a photograph showing an example of a steel floor tile manufactured according to an embodiment of the technical idea of the present invention.

The advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described in detail below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure will be thorough and complete and so that the spirit of the invention can be sufficiently conveyed to those skilled in the art.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application. No.

Hereinafter, with reference to the attached drawings, a steel floor tile according to an embodiment of the technical idea of the present invention will be described in detail with preferred embodiments.

Figure 1 is a cross-sectional view schematically showing the cross section of a steel floor tile according to an embodiment of the technical idea of the present invention, and Figure 2 is a cross-sectional view showing the upper surface of a steel floor tile manufactured according to an embodiment of the technical idea of the present invention. It is a photograph showing, Figure 3 is a photograph showing the lower surface of a steel floor tile manufactured according to an embodiment of the technical idea of the present invention, and Figure 4 is a steel floor tile manufactured according to an embodiment of the technical idea of the present invention This photo shows an example of this construction.

1 to 4, the steel floor tile 10 according to an embodiment of the technical idea of the present invention includes a fiberboard 100 and a sheet layer 200 glued on top of the fiberboard 100. .

The fiberboard 100 may be glued and fixed to the floor. For example, the fiberboard 100 may include plywood, wood plastic composite (WPC), particle board (PB), or medium-density fiberboard. Any one or more selected from the group consisting of (MDF: Medium Density Fiberboard) and high density fiberboard (HDF: High Density Fiberboard) may be used, and preferably high density fiberboard (HDF: High Density Fiberboard) may be used.

In addition, the bottom surface of the fiber board 100 may be formed in a checkerboard-shaped uneven structure. The bottom surface of the uneven structure allows the steel floor tile 10 to bend easily and have soft elasticity, so that the steel floor tile 10 ) to facilitate construction on the floor surface, and also to further strengthen the adhesion between the floor surface of the building to which adhesive is applied during construction and the steel floor tile (10).

For example, the fiber board 100 is formed to have a thickness of 1 to 5 mm, and a groove 110 of a certain depth and width may be formed from the bottom surface of the fiber board 100. Specifically, the groove 110 ) is formed to a depth of 1 to 3 mm at the bottom of the bottom surface of the fiber board 100, and the width may range from 1 to 10 mm.

In the present invention, the groove 110 can be formed by using known means such as a router bit or circular saw, and the configuration for forming the groove 110 on the bottom surface of the fiber board 100 is known. Since this is a technology, detailed description thereof will be omitted for convenience of explanation and clarity of the technical idea of the present invention.

The sheet layer 200 is positioned by being glued on top of the fiberboard 100, and can improve physical properties such as mechanical strength, durability, and adhesion of the steel floor tile 10. For example, the sheet layer 200 A HPM (High Pressure Melamine) sheet may be used, and in addition, various sheets known in the art, such as a PVC (Polyvinyl Chloride) sheet, may be used.

In the present invention, the HPM (High Pressure Melamine) sheet manufactured by the following method may be used.

First, in order to manufacture the HPM (High Pressure Melamine) sheet, kraft paper can be prepared.

Since kraft paper is tougher than regular paper, HPM sheets manufactured including it can have further improved rigidity.

Next, the kraft paper can be impregnated with a melamine resin composition and then dried to produce melamine resin-impregnated kraft paper. For example, the melamine resin-impregnated kraft paper is made up of 55 to 65% by mass of the melamine resin composition relative to the mass of the kraft paper. It can be prepared by impregnating and then drying in an oven at a temperature of 150 to 170°C for 3 to 7 minutes.

The melamine resin composition may include melamine resin, polyurethane resin, acrylonitrile-butadiene rubber (NBR), natural rosin, plasticizer, graphene, carrier, anti-aging agent, tackifier resin, ethanol, and curing agent. For example, the melamine resin composition includes 20 to 30 parts by weight of polyurethane resin, 10 to 20 parts by weight of acrylonitrile-butadiene rubber (NBR), and natural 1 to 5 parts by weight of rosin, 10 to 20 parts by weight of plasticizer, 1 to 3 parts by weight of graphene, 1 to 5 parts by weight of carrier, 1 to 5 parts by weight of anti-aging agent, 30 to 40 parts by weight of tackifier resin, 10 to 30 parts by weight of ethanol. It may be included in a weight ratio of 20 to 40 parts by weight of the curing agent.

The melamine resin is a thermosetting resin made by reacting melamine and formaldehyde. The melamine resin can serve to strengthen the surface while improving adhesion, durability, and strength. In the present invention, the melamine resin may be of various known types, and since the composition of the melamine resin is a known technology, detailed description thereof will be omitted for convenience of explanation and clarity of the technical idea of the present invention. Do this.

The polyurethane resin provides adhesion and can implement thermal bonding and high-frequency welding with a seamless hot press. It has a urethane bond in the molecule, has excellent abrasion resistance, oil resistance, and solvent resistance, and is low-cost, lightweight, and Due to its easy processability, it is used in various fields such as adhesives, injection molding, ink, paint, foam, furniture, and materials for electrical devices.

The general manufacturing process (prepolymer method) of the polyurethane (PU) resin is to prepare a prepolymer by mixing polyol, a dispersant (ionizing agent), a neutralizer, a prepolymer chain extender, and isocyanate and polymerizing the prepolymer at a high temperature. After that, the polymerized prepolymer is added to water being stirred at high speed to disperse the prepolymer, and a chain extender is added to conduct a polymerization reaction of the dispersed prepolymer and adjust the molecular weight to produce a polyurethane resin with an appropriate molecular weight through chain extension. is synthesized.

The polyurethane resin is a type of polymer containing a urethane bond in the main chain. The polyurethane resin is a urethane bond formed through polycondensation of the hydroxy group (-OH) of polyol and the isocyanate group (-NCO) of isocyanate. The properties of the resulting polyurethane vary depending on the properties of the polyol and isocyanate.

In particular, common polyols used include polyester polyol and polyether polyol, polyester polyols include lactone-based polyester polyols and adipic acid-based polyester polyols, and adipic acid-based polyester polyols are polyfunctional. It is obtained by polymerization of a carboxylic acid compound and a polyfunctional alcohol compound, and adipic acid as a polyfunctional carboxylic acid compound and diol or triol as a polyfunctional alcohol compound are used.

The acrylonitrile-butadiene rubber (NBR) is the only rubber that can be mixed with polyurethane resin, including acrylonitrile (AN) and 1,3-butadiene (BD). It is produced based on the copolymerization of ), and its main feature is excellent oil resistance due to acrylonitrile (AN).

Moreover, the acrylonitrile butadiene rubber has excellent physical properties such as oil resistance, aging resistance, wear resistance, and gas permeability resistance, and has good processability, so it is widely used in the development of materials for various industrial parts in the mechanical industry such as automobiles.

The acrylonitrile-butadiene rubber can, in principle, be divided into so-called cold polymerization and hot polymerization. Low-temperature polymerization generally occurs at a temperature of 5 to 15°C, and generally 30 to 40°C. In contrast to the high temperature polymerization performed in , a smaller number of chain branches are formed. For example, the acrylonitrile-butadiene rubber is available from a number of manufacturers such as Nitriflex, Zeon, LG Chemicals, and Lanxess.

The acrylonitrile-butadiene rubber (NBR) is used together with natural rosin and a plasticizer to provide high friction not only in a dry sheet state, but also in a wet sheet state due to moisture, etc., and the plasticizer It prevents eruption and improves bonding with natural rosin.

The natural pine resin refers to a balsam secreted when a tree of the pine family is damaged, and is also called pine resin. It is initially a clear, colorless and transparent liquid, but becomes cloudy over time. It becomes sticky and hardens by precipitating a white solid from resin acid.

The main components of this natural rosin are resin (Rosin) accounting for 70-75%, essential oil (Turpentione) accounting for 18-22%, and water and other impurities accounting for 5-7%. Rosin acids such as levopimaric acid and neoabietic acid account for 60-65%.

Due to these characteristics, natural rosin has the property of being soluble in solvents but insoluble in water. Turpentine contained in rosin is used as a solvent for ointments, reinforcing agents, shoe polish, rubber, and waterproofing agents, and rosin is used as a solvent for soap, desiccant, insecticide, and papermaking. It is used as a medicine, bandage, etc.

In the present invention, the natural rosin is mixed with acrylonitrile-butadiene rubber (NBR) to further strengthen the adhesion of the HPM sheet, and high friction is formed even in a wet sheet state due to moisture, etc. can prevent slipping.

The plasticizer acts as a softener of rubber to improve elongation and elasticity, and is added to the melamine resin composition to lower melt viscosity and glass transition temperature (Tg) to improve processability and provide various physical properties and functions such as flexibility and cold resistance to the final product. It is an essential additive.

For example, the plasticizer may be one or more selected from the group consisting of epoxy-based plasticizers, benzoate-based plasticizers, citrate-based plasticizers, phosphate-based plasticizers, and adipate-based plasticizers. Preferably, heat resistance, cold resistance, An epoxy-based plasticizer, which is a stabilizer with excellent processability, etc., may be provided.

The epoxy-based plasticizer may include epoxidized octyl stearate, epoxidized fatty acid ester, etc., but is not limited thereto.

The benzoate plasticizers include 2-(2-(2-phenylcarbonyloxyethoxy)ethoxy)ethyl benzoate, glyceryl tribenzoate, trimethylolpropane tribenzoate, isononyl benzoate, and 1-methyl. -2-(2-phenylcarbonyloxypropoxy)ethyl benzoate, 2, 2, 4-trimethyl-1, 3-pentanediol dibenzoate, n-hexyl benzoate or trimethylol propanetribenzoate can be used. However, it is not limited to this.

The citrate-based plasticizer may be acetyltributyl citrate or tributyl citrate, but is not limited thereto.

The phosphate-based plasticizer may be tricresyl phosphate or tributyl phosphate, but is not limited thereto.

The adipate plasticizer may be bis(2-ethylhexyl) adipate, dimethyl adipate, monomethyl adipate, or dioctyl adipate, diisononyl adipate, but is not limited thereto.

The graphene is the most outstanding material among existing materials in terms of various characteristics such as strength, thermal conductivity, electron mobility, deodorizing properties, and antibacterial properties. Accordingly, technology for commercializing graphene is receiving much attention as it is applied to various fields such as displays, secondary batteries, solar cells, automobiles, and lighting, and is recognized as a strategic core material that will drive the growth of related industries.

That is, graphene is a two-dimensional carbon allotrope in which carbon atoms form a hexagonal honeycomb lattice structure through sp ² hybridization, and the thickness of single-layer graphene is 0.2 to 0.3 nm, which is the thickness of one carbon atom. Graphene has high electrical conductivity and specific surface area, so it is used in supercapacitors, sensors, batteries, electrodes (electrode active materials) for actuators, touch panels, flexible displays, high-efficiency solar cells, heat dissipation films, coating materials, seawater desalination filters, and secondary batteries. It is used in various fields such as electrodes and ultra-fast chargers.

The carrier may be an inorganic compound or an organic compound in the form of granules or fine particles. Specifically, the carrier has an average particle diameter of 50 to 250㎛, a specific surface area of 100 to 800 m ² /g, and a pore volume of 5 to 25 cm ³ /g. A phosphorus carrier is preferred.

In addition, porous oxides, inorganic chlorides, clays, or clay minerals may be used as the inorganic compounds. Examples of the porous oxides include SiO ₂ , Al ₂ 0 ₃ , MgO, ZrO, TiO ₂ , B ₂ 0 ₃ , CaO, and ZnO. , BaO, ThO ₂ , and complex compounds or mixtures containing these oxides, preferably compounds containing SiO ₂ or Al ₂ O ₃ as a main component.

As the inorganic chloride, one or more selected from the group consisting of MgCl ₂ , MgBr ₂ , MnCl ₂ and MnBr ₂ may be used. The inorganic chloride may be used after being pulverized by a ball mill or vibrating mill.

The clay or clay minerals include kaolin, bentonite, kibushi clay, gairome clay, elophene, hisingerite, pyrophyllite, mica group, montmorillonite group, vermiculite, Any one or more selected from the group consisting of chlorite, palygorskite, kaolinite, nacrite, dickite, and halloysite may be used.

In addition, the organic compounds include (co)polymers manufactured using α-olefins with 2 to 14 carbon atoms, such as ethylene, propylene, 1-butene or 4-methyl-1-pentene, vinylcyclohexane or styrene. (Co)polymers produced as main components and their modified products can be mentioned.

The anti-aging agent is used to improve fatigue resistance and ozone resistance, and includes zinc-2-ethylhexanoate, 4-(1-methyl-1-phenylethyl)-N-[4-( 1-methyl-1-phenylethyl)phenyl]aniline, zinc methyl mercaptobenzimidazole, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, paramin wax, poly(2) , 2,4-trimethyl-1,2-dihydroquinoline), zinc diacrylate, etc. can be used.

The tackifying resin is at least one selected from the group consisting of rosin-based resin, rosin ester, C5 resin, C9 resin, hydrogenated resin (DCPD, C5 hydrogenated resin, C9 hydrogenated resin), terpene resin, coumarone indene resin, and petroleum resin. This can be used.

The ethanol can play a role in uniformly mixing the melamine resin, polyvinyl alcohol, graphene, etc. in the melamine resin composition and controlling the viscosity and formulation.

The curing agent may play a role in promoting curing of the melamine resin composition. For example, the curing agent may include glycerin, p-toluenesulfonic acid monohydrate (PTSA), morpholine, ammonium chloride, Any one or more selected from the group consisting of ammonium sulfate and phthalic anhydride may be used.

Next, a plurality of the melamine resin impregnated kraft paper can be stacked and then heat-compressed.

The thermal compression of the melamine resin-impregnated kraft paper can be performed by laminating a plurality of the melamine resin-impregnated kraft paper and then pressing it at a constant pressure using a hot press. For example, the thermal compression can be performed using melamine. 3 to 7 sheets of resin-impregnated kraft paper are stacked and placed, and then pressed for 20 to 60 minutes at a pressure of 10 to 20 kgf/m ² at a press plate temperature of 130 to 150 ℃, thereby bonding a plurality of melamine resin-impregnated kraft papers by heat compression. You can do it.

Next, the heat-compressed melamine resin-impregnated kraft paper can be cooled to produce a High Pressure Melamine (HPM) sheet.

For example, the HPM (High Pressure Melamine) sheet may be manufactured by cooling the heat-compressed melamine resin-impregnated kraft paper in a drying room at 20 to 40°C.

In the present invention, the sheet layer 200 and the fiberboard 100 can be manufactured by thermocompression. For example, the sheet layer 200 and the fiberboard 100 are laminated and then pressed at a high temperature. It can be thermocompressed by applying pressure at a certain pressure.

Specifically, the sheet layer 200 and the fiberboard 100 are sequentially stacked and placed, and then pressed for 20 to 60 minutes at a pressure of 10 to 20 kgf/m ² at a press plate temperature of 130 to 160 ° C. (200) and the fiberboard (100) can be bonded by heat compression.

In addition, the edge portion of the steel floor tile 10 formed by laminating the sheet layer 200 and the fiber board 100 is chamfered to form a chamfered surface 120, so that after construction of the steel floor tile 10 The seam portion can be formed naturally. For example, the chamfered surface 120 is formed by stacking the sheet layer 200 and the fiberboard 100 at least one of the edge portions of the steel floor tile 10. It can be chamfered at an angle in the range of 0.3 to 1 mm.

The present invention chamfers one or more of the edge portions of the river floor tile 10 as described above to form the chamfered surface 120, so that the tiles are naturally connected during construction of the river floor tile 10, and furthermore, the river floor tile This can prevent the border of (10) from being easily damaged.

Hereinafter, a steel floor tile according to an embodiment of the technical idea of the present invention will be described in more detail with reference to the attached drawings.

<Example>

First, high-density fiberboard (HDF) and HPM (High Pressure Melamine) sheets were laminated and then adhered by pressing at a pressure of 15 kgf/m ² for 40 minutes at a press plate temperature of 145°C.

Next, a steel floor tile was manufactured by chamfering the edges of the bonded high-density fiberboard (HDF) and HPM (High Pressure Melamine) sheets to 0.6 mm.

At this time, the HPM (High Pressure Melamine) sheet was manufactured by the following method.

First, kraft paper was prepared, impregnated with 60% by mass of a melamine resin composition relative to the mass of the kraft paper, and then dried in an oven at 160° C. for 5 minutes to prepare melamine resin-impregnated kraft paper.

Here, the melamine resin composition contains 25 parts by weight of polyurethane resin, 15 parts by weight of acrylonitrile-butadiene rubber (NBR), 3 parts by weight of natural rosin, and 15 parts by weight of plasticizer, based on 100 parts by weight of the total melamine resin content. It contained 2 parts by weight of graphene, 3 parts by weight of carrier, 3 parts by weight of anti-aging agent, 35 parts by weight of tackifier resin, 20 parts by weight of ethanol, and 30 parts by weight of curing agent.

Next, five sheets of the melamine resin-impregnated kraft paper were stacked and placed, and then pressed for 40 minutes at a pressure of 15 kgf/m ² at a press plate temperature of 140° C., thereby bonding a plurality of melamine resin-impregnated kraft papers by heat compression.

Next, a high pressure melamine (HPM) sheet was manufactured by cooling the heat-compressed melamine resin-impregnated kraft paper in a drying room at 30°C.

1. Wear resistance test

A wear resistance test was performed on the steel floor tiles manufactured according to the examples, and the results are shown in [Table 1] below.

Test method: Based on KS F 3126, (initial wear + final wear)/2 = Pass if more than 350 times

Sample specifications: Experiment by producing an experimental disk with a diameter of 100 mm

Quality standard: Test by replacing the wear wheel with a new wear wheel every 200 revolutions with S-42.

Test Items wear wheel Test result result note initial wear point final wear point wear resistance S-42 Episode 505 665 times 585 times pass

Referring to [Table 1], in the abrasion resistance test of the steel floor tile manufactured according to the example, the initial wear point was 505 times, the final wear point was 665 times, and it was confirmed that it showed excellent abrasion resistance characteristics.

2. Dimensional change rate experiment

An experiment on the dimensional change rate of the steel floor tiles manufactured according to the examples was performed, and the results are shown in [Table 2] below.

Test method: Refer to KS F 3216 decorative wood floorboard test, measure length change rate (%) after immersion in water at 20℃ for 24 hours

Sample specifications: Maru’s ledger size

Test Items Before input (mm) After input (mm) Result (length change rate %) Dimensional change rate 800 801.48 0.185%

Referring to [Table 2], the length change rate (%) was measured after the sample was placed in water at a temperature of 20°C for 24 hours, and the length change rate was 0.185%. The steel floor tile manufactured according to the example was It was confirmed that it was stable in moisture, etc.

3. Absorption thickness expansion rate experiment

An experiment on the absorption thickness and expansion rate of the steel floor tile (6 mm thick) manufactured according to the example was performed, and the results are shown in [Table 3] below.

Test method: Refer to KS F 3216 decorative wood reinforced floorboard test, soak in water at 20℃ for 24 hours in a constant temperature water bath, remove moisture, and measure thickness change rate (%)

Sample specifications: Maru’s ledger size

Quality standard: 6% or less

Test Items Before input (mm) After input (mm) Result (thickness change rate %) Dimensional change rate 6.5 6.65 2.3077%

Referring to [Table 3], the sample was placed in water at a temperature of 20°C for 24 hours in a constant temperature water bath, the moisture was removed, and the thickness change rate (%) was measured. As a result, the thickness change rate (%) was measured, and the absorption thickness expansion rate was 2.3077%. It was confirmed that the quality standards were met.

4. Physical property measurement (1)

The adhesion strength and tensile shear adhesive strength of the steel floor tiles manufactured according to the examples were measured using the KS M 3015 method, and the adhesion was measured according to the quality assurance inspection standards, and the results are shown in [Table 4] below.

Test Items result Test Methods Adhesion strength (N/㎟) 28 KS M 3015 Tensile shear bond strength (N/㎟) 49 KS M 3015 Adhesion (standard condition) 1,277 KPa Quality assurance inspection standards Adhesion (adhesion after water resistance) 878 KPa Quality assurance inspection standards Adhesion (adhesion after heat resistance) 835 KPa Quality assurance inspection standards

Referring to [Table 4], it was confirmed that the steel floor tiles manufactured according to the examples had excellent adhesion strength and tensile shear bond strength, and could be firmly adhered.

5. Physical property measurement (2)

The physical properties of the steel floor tiles according to the above examples were measured and shown in [Table 5] below.

division Example Test Methods Scratch resistance (mm) 104 driver drop no problem plastic ruler Caster resistance (chair wheels) no problem 55kg, 1000 round trips Scratch resistance (N) 2.3 diamond chips Coin scratch no problem 11kg x 500mm/sec Coin stamping ability no problem 1,000mm/sec

Referring to [Table 5], it can be seen that the durability of the steel floor tile according to the example is improved.

Above, a preferred embodiment of the present invention has been described with reference to the attached drawings, but those skilled in the art will understand that the present invention can be modified in another specific form without changing its technical idea or essential features. You will understand that it can be done. Therefore, the embodiment described above should be understood as illustrative in all respects and not restrictive.

10; Gangmaru tile
100; fiberboard
110; home 120; Chamfered noodles
200; sheet layer

Claims (2)

It includes a fiberboard (100) and a sheet layer (200) glued on top of the fiberboard (100),
The fiber board 100 is formed to a thickness of 1 to 5 mm, and a groove 110 of a certain depth and width is formed from the bottom surface of the fiber board 100, and the groove 110 is 1 mm from the bottom of the bottom surface of the fiber board 100. It is formed to a depth of from 1 to 3 mm, and the width ranges from 1 to 10 mm,
The fiberboard 100 is a high-density fiberboard (HDF), and the sheet layer 200 is a High Pressure Melamine (HPM) sheet.
A chamfered surface 120 is provided by chamfering at least one of the edge portions of the steel floor tile 10 formed by adhering the sheet layer 200 and the fiber board 100 at an angle of 0.3 to 1 mm, and ,
The HPM (High Pressure Melamine) sheet is prepared by preparing kraft paper, impregnating it with 55 to 65% by mass of a melamine resin composition relative to the mass of the kraft paper, and then baking in an oven at a temperature of 150 to 170 ° C. for 3 to 7 minutes. Melamine resin-impregnated kraft paper is prepared by drying for a while, wherein the melamine resin composition contains 20 to 30 parts by weight of polyurethane resin and 10 to 20 parts by weight of acrylonitrile-butadiene rubber, based on 100 parts by weight of the total melamine resin content. parts, natural rosin 1 to 5 parts by weight, plasticizer 10 to 20 parts by weight, graphene 1 to 3 parts by weight, carrier 1 to 5 parts by weight, anti-aging agent 1 to 5 parts by weight, tackifier resin 30 to 40 parts by weight, ethanol It is contained in a weight ratio of 10 to 30 parts by weight and 20 to 40 parts by weight of the curing agent, and the carrier has an average particle diameter of 50 to 250㎛, a specific surface area of 100 to 800 m ² /g, and a pore volume of 5 to 25 cm ³ /g. , 3 to 7 sheets of the melamine resin-impregnated kraft paper are stacked and placed, and then pressed for 20 to 60 minutes at a pressure of 10 to 20 kgf/m ² at a press plate temperature of 130 to 150 ℃, thereby thermally compressing the melamine resin-impregnated kraft paper. An HPM (High Pressure Melamine) sheet is used, which is manufactured through a process of adhering and cooling the heat-pressed melamine resin-impregnated kraft paper in a drying room at 20 to 40°C.
The sheet layer 200 and the fiber board 100 are manufactured by thermocompression, and the sheet layer 200 and the fiber board 100 are sequentially stacked and placed and then pressed at a press hot plate temperature of 130 to 160° C. at 10 to 20 kgf/ A steel floor tile, characterized in that it is manufactured by thermocompressing the sheet layer 200 and the fiber board 100 by pressing at a pressure of m ² for 20 to 60 minutes. delete