KR20210060380A - Functional synthetic resin deck with natural wood texture - Google Patents

Abstract

The present invention relates to a synthetic resin deck installed to finish the floor of the building interior / exterior, balcony, walkway, or the like in order to improve the function and design of the living environment. More particularly, the present invention relates to a synthetic resin deck embodying a natural wood texture without adding wood powder to improve the environment. The synthetic resin deck does not use wood powder or wood, so corrosion and deformation due to changes in moisture and temperature do not occur, and it has the advantage of semi-permanent quality assurance and no maintenance required. In addition, since a lower part of a main body is recessed in a T-shape, a clip used as a connection member is more stable by combining grooves on both sides and a recessed part at the bottom, and due to an uneven pattern of bark pattern on a surface layer exposed to the outside, there is an anti-slip effect.

Description

Functional synthetic resin deck with natural wood texture {FUNCTIONAL SYNTHETIC RESIN DECK WITH NATURAL WOOD TEXTURE}

The present invention is a synthetic resin deck installed to finish floors such as inside/outside buildings, balconies, and walkways in order to improve the function and design of the living environment. More specifically, natural wood powder is not added to improve the environment. It relates to a synthetic resin deck that embodies the wood texture.

As the quality of life increases and the desire to improve the living environment is increasing, the demand for designs containing nature is also increasing. Accordingly, decks, which are interior and exterior flooring materials, are widely used to create spaces where people can enjoy life such as rural houses, outdoor parks, cafe terraces, resorts and pensions, and inside and outside houses.

Wood decks and synthetic decks sold in the market are commonly produced using wood, which is the easiest way to secure product performance and quality, such as impact resistance and flexural strength. Deck is divided into wood deck (preservative wood, hard wood) produced by processing natural wood and synthetic deck (WPC deck) produced by adding wood flour to synthetic resin.

Wood decking is the most commonly used flooring material. It adopts a processing method that improves water resistance by immersing natural wood in an antiseptic solution to allow chemicals to soak into the wood, and cost-effectiveness and construction and installation are simple. However, since it is wood, it is very susceptible to moisture, so it is easy to crack or break during repeated contraction and expansion, and its durability is low and its life is short. Since it is wood, it is well seasoned and needs more periodic cleaning and maintenance. In addition, when the antiseptic effect is inferior, the surface abrasion proceeds rapidly, and it is vulnerable to temperature, so contamination by rosin is severe in hot summer.

In the case of synthetic timber, a similar problem to that of a wooden deck occurs. Synthetic wood is compression-processed with wood and synthetic resin (plastic), so it is less absorbent than a wooden deck, so it does not rot and has good durability. However, since the material cost and thermal conductivity are higher than that of a wooden deck, in the hot summer months, the phenomenon of colliding and breaking due to contraction and expansion in the longitudinal direction and the phenomenon of warping and deformation due to the influence of wood powder among the materials of synthetic wood occur. In addition, synthetic decks are a product that replaces wooden decks that require large maintenance at the time of invention, and were sold by promoting them with the advantage that they can secure quality semi-permanently and do not require maintenance. There is a lot of damage caused by this.

In order to solve this vicious cycle, it is necessary to develop a product that can meet the quality and performance standards required by conventional flooring (deck) without using wood or wood powder.

Korean Patent Registration No. 10-1645205

The present invention is to provide a synthetic resin deck that meets the quality and performance standards required by conventional flooring by implementing the texture of natural wood without using wood or wood powder.

The synthetic resin deck of the present invention has a T shape in which the lower end of the synthetic resin deck body is recessed in the longitudinal direction, and grooves into which the connecting members are inserted to be fixed with other adjacent decks are formed in the longitudinal direction on both sides of the body. In order to prevent slipping on the surface layer, an uneven pattern of a bark pattern may be formed in an intaglio shape having a depth of 0.5 to 1 mm.

The synthetic resin deck contains 85 to 90% by weight of plastic resin, 5 to 10% by weight of stone powder or minerals, 1 to 3% by weight of additives, 1 to 3% of color pigment, and the plastic resin includes GPPS, HIPS and EPS. It includes at least one selected from the group, the minerals include shellfish powder and calcium carbonate, the additive includes a UV stabilizer and an antioxidant, and the color pigment may be used as a master beach.

In addition, the synthetic resin deck comprises the steps of (a) mixing raw materials and putting them into a hopper; (b) forming a body and a surface layer through a double extrusion technique; (c) bonding the body and the surface layer by pressing; (d) stabilizing by lowering the temperature by putting the deck to which the main body and the surface layer are bonded to a cooling water tank; (e) forming an uneven pattern of a bark pattern on the surface layer of the deck; And (f) cutting it into a predetermined length with a rotating saw and then packing it, and the melting temperature of the raw materials in the step (a) is 140 to 160°C, and the step (e) It may be characterized in that a bark pattern is formed by rotating and left-right driving rollers on the surface layer of the deck having a surface temperature of 120 to 140°C.

Since the synthetic resin deck of the present invention does not use wood powder or wood, corrosion and deformation do not occur due to changes in moisture and temperature, and it is possible to secure quality semi-permanently and has the advantage that maintenance is not required. In addition, the lower part of the main body is recessed in a T-shape, so that the clip used as the connecting member is more stable by combining the grooves on both sides and the recessed part of the lower part, and the uneven pattern of the bark pattern on the surface layer exposed to the outside. By forming a non-slip effect.

1 is a view showing the state of the synthetic resin deck of the present invention.
Figure 2 is a view showing the state of the clip used as a connecting member in the present invention.
3 is a cross-sectional view showing a state in which the synthetic resin deck of the present invention is combined as an example using the clip of FIG. 2.
Figure 4 is a flow chart showing a method of manufacturing a synthetic resin deck of the present invention.
Figure 5 is a flow chart showing the manufacturing process of the synthetic resin deck of the present invention.
6 is a table showing the presence or absence of surface destruction and other damages of the synthetic resin deck of the present invention and the conventional product 1.
7 is a table showing the presence or absence of surface peeling between the synthetic resin deck of the present invention and the conventional product 2.

In the following, the present invention will be described in more detail through specific contents, <Example> and <Test Example> for carrying out the present invention, but the embodiment of the present invention can be modified in various other forms. The scope is not limited to the embodiments described below.

Throughout the specification of the present invention, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated. Throughout the specification of the present invention, when a step is positioned "on" or "before" another step, it is not only the case that a step is in a direct time series relationship with the other step, but also the mixing step after each step and Likewise, the order of the two steps can contain the same rights as in the case of an indirect time-series relationship that can change the time-series order.

The terms "about", "substantially", etc. of the degree used throughout the specification of the present invention are used at or close to the numerical value when manufacturing and material tolerances specific to the stated meaning are presented, and the present invention To aid in understanding of, accurate or absolute figures are used to prevent unreasonable use of the stated disclosure by unscrupulous infringers. As used throughout the specification of the present application, the term "step (to)" or "step of" does not mean "step for".

The synthetic resin deck of the present invention comprises 85 to 90% by weight of plastic resin, 5 to 10% by weight of stone powder or minerals, 1 to 3% by weight of additives, and 1 to 3% of color pigments. As the plastic resin, a mixture containing at least one selected from the group including GPPS, HIPS, and EPS, which are types of polystyrene, is used. Since the synthetic resin deck of the present invention does not use wood powder, stone powder or minerals are added to ensure dimensional stability, and the minerals include shellfish powder and calcium carbonate. The additives include UV stabilizers and antioxidants, and the UV stabilizers increase light resistance (resistance to degradation of the material's performance when irradiated with sunlight or artificial light, mainly ultraviolet rays), and the antioxidants increase weather resistance (various climates). It is used to improve the ability to endure. In addition, Master Beach is used as a color pigment for wood texture.

Polystyrene (PS) is an amorphous polymer obtained by radical polymerization of styrene, and is a thermoplastic plastic resin. It is colorless, transparent, freely colored, and has a small specific gravity. Polystyrene is the easiest to process among plastic resins, and has the strongest light-related stability and radiation resistance. Polystyrene mixtures are most suitable as plastic resins that can replace construction materials and wood. In general, it has the best processing adaptability, and in particular, it has a wider melting temperature range than other thermoplastic resins, so it is easy to handle in molding processing. Polystyrene is excellent in molding processing because it has good thermal stability and fluidity when dissolved, and is particularly suitable for injection and extrusion molding. The dimensional stability of molded products is excellent and the cost of raw materials is low. It has good gloss, is transparent, and is easy to shape, so it is used in disposable cups and packaging containers for sweets. In addition, it is not toxic and is excellent as an electrical insulating material. However, due to its low heat resistance, it melts easily when it touches hot things. It is hydrophobic and insoluble in water, and is well soluble in organic solvents such as DMF (Dimethylformamide) or chlorobenzene. Oxidation occurs on the surface with ultraviolet rays, ozone or plasma in the air, which can turn the surface into hydrophilicity.

Types of polystyrene include General Purpose PolyStyrene (GPPS), High Impact PolyStyrene (HIPS), and Expanded PolyStyren (EPS).

GPPS refers to a material synthesized without additives other than polystyrene. It has the characteristic of being colorless and transparent, and its moldability is good, but it has the disadvantage of poor durability and white wear. It is mainly used in large black electronic products such as televisions and printers, and in the case of portable devices, it is used for remote control or desktop audio. It is also widely used in scotch tape holders, disposable tableware, yogurt containers and measuring cups.

HIPS is a material made by mixing polystyrene and polybutadiene. It has a milky white color and reinforces the impact absorption, which is a disadvantage of general-purpose polystyrene. Its use is almost the same as that of general-purpose polystyrene, and it is also used as a remote control, general electronic calculator, and exterior of videotape/cassette audio tape. Relatively more resistant to impact and abrasion than general-purpose polystyrene.

EPS is commonly known as styrofoam. It refers to polystyrene having a different structure through foaming, and its constituents are similar to pure polystyrene. When carbon dioxide or propane is absorbed in the manufacturing process and then molded, it becomes a white resin containing many small bubbles of gas. 98% of air is composed of air, and the trapped air layer exerts heat shielding performance, thus exhibiting thermal insulation performance. As a feature, it is very light and has good insulation, so it is used as a wall insulation material or ice box, or as a cushioning material. It is also used as a buffer inside the helmet.

Seokbun (石粉) means stone powder. Stones are collected from the quarry, and large stones are classified as landscaping stones, small stones as canine stones, smaller stones as fine aggregate crushed stone (crushed gravel), and smaller stone powders are classified as stone dust. Stone dust is often used for laying on the ground to solidify land, such as the sub-base part of the road floor.

Stone powder has a low volumetric deformation rate according to the surrounding environment, so that even if it is used for a long time, it hardly changes in shape, and because the particles are small and dense, high strength can be achieved without using a large amount of additives. In addition, there is an advantage in that processing and molding are easy.

Calcium carbonate (CaCO ₃ ) is a colorless crystal or white solid composed of calcium ions (Ca ²⁺ ) and carbonate ions (CO ₃ ^2- ), and has a specific gravity of 2.93 and decomposes at 825°C. When heated, carbon dioxide is produced and quicklime can be obtained. Calcium carbonate is the main component of rock and exists in crystalline form, and calcite and aragonite occupy most of it. Calcium carbonate minerals that can be easily found in nature include limestone and marble. In addition, it is the main component of pearls and shells, and the shells of eggs are also mostly made of calcium carbonate.

Calcium carbonate is relatively easy to obtain, so it is inexpensive, and its specific gravity is not so large that it is widely used in industrial fields. It is used as a mineral feedstock for plant growth, and is also used as an antacid to suppress excessive stomach acid. In addition, it is used in various ways, from cement, which is a building material, to fertilizer that prevents the acidification of the soil.

Environmental factors such as light, oxygen, humidity, and temperature in the atmosphere cause discoloration, cracking of the surface, and deterioration of mechanical properties. In particular, ultraviolet rays in sunlight (only ultraviolet rays between 290 nm and 400 nm reach the surface) have the greatest effect. Therefore, most polymers add UV Stabilizers when used outdoors.

Decomposition of a polymer by ultraviolet rays causes decomposition by generating free radicals when chromophores (chromophores) in the polymer absorb ultraviolet energy and cannot release energy in other forms. Accordingly, there are two methods of stabilizing the UV stabilizer.

① It blocks ultraviolet energy or selectively absorbs ultraviolet energy and releases it as another form of energy that does not harm the polymer, or suppresses the chromophore of the activated polymer to inhibit the photolysis initiation reaction. There are UV Screener, UV Absorber, and Quencher.

② In case of decomposition reaction by ultraviolet rays, it reacts with free radicals or hydrogen peroxide to stop the generation of free radicals and decomposes peroxide to inhibit the growth reaction. Radical Scavenger, Hyperoxide Decomposer, and Hindered Amine Light Stabilizer (HALS).

Antioxidants are substances that block the action of oxygen on various substances that cause oxidation reactions at high temperatures. It is also known as an antioxidant (抗酸化劑). It is added to prevent automatic oxidation by the action of oxygen, which is likely to occur in high molecular substances, petroleum products, oils, and soaps. There are indirect antioxidants that deactivate metals that act as catalysts for oxidation reactions, such as quinones, amines, phenols, etc. that are directly involved in the oxidation reaction to prevent oxidation. Synthetic rubbers generally use phenyl-β-naphthylamine, and other aromatic amines and hydroquinones are used. Natural rubber contains amino acids in latex as natural antioxidants. Oils and fats contain vitamin E, sesamol, vitamin C, and quercetin as natural antioxidants.

Masterbeach is also called masterbatch, and it refers to making a color according to product characteristics by placing a masterbatch on transparent or white resin.

In processing and molding by extrusion or injection using plastic raw materials (LDPE, EVA, PP, PET, PC, PVC, etc.), it has the desired function when you want to give color or some special function to the plastic product you want to make. Plastic products with a desired color or special function can be made only when additives are added to the basic plastic raw material. In general, additives with these functions are in powder or liquid state, so it is difficult to mix them directly with plastic raw materials, and the kneading properties with basic plastic raw materials deteriorate, resulting in poor dispersion of additives, resulting in desired colors or special functions. You will not be able to make plastic products with

In order to solve this problem, a master batch is a pellet-shaped raw material in which basic plastic raw materials and additives to be added are concentrated and dispersed at a high concentration. By mixing plastic raw materials and masterbatch together and processing and molding, plastic products with desired colors or special functions can be made.

The present invention relates to a functional synthetic resin deck that implements the texture of natural wood without using wood or wood powder, and a synthetic resin deck according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The synthetic resin deck of the present invention is a method in which polystyrene types are mixed and used, and the disadvantages of heat resistance and impact resistance are completely compensated for by mixing them in an arbitrary ratio and matching required physical properties. Because polystyrene has a small specific heat, it is quick to cool and solidify in a mold, and it can improve production processability, and it is light and strong by using expanded polystyrene (EPS). In addition, when minerals such as stone powder or calcium carbonate are mixed by adding a small amount of foam to polystyrene, a similar structure such as weight and strength related to wood can be implemented.

1 is a view showing the state of the synthetic resin deck of the present invention.

The synthetic resin deck of the present invention has a T shape in which the lower end of the synthetic resin deck body is recessed in the longitudinal direction, and grooves into which the connecting members are inserted to be fixed with other adjacent decks are formed in the longitudinal direction on both sides of the body. In order to prevent slipping on the surface layer, the uneven pattern of the bark pattern is formed in an intaglio shape with a depth of 0.5 to 1 mm.

The synthetic resin deck contains 85 to 90% by weight of plastic resin, 5 to 10% by weight of stone powder or minerals, 1 to 3% by weight of additives, 1 to 3% of color pigment, and the plastic resin includes GPPS, HIPS and EPS. It includes at least one selected from the group, the minerals include shellfish powder and calcium carbonate, the additive includes a UV stabilizer and an antioxidant, and the color pigment may be used as a master beach.

Figure 2 is a view showing the state of the clip used as a connecting member in the present invention, Figure 3 is a cross-sectional view showing a state in which the deck is coupled using the clip of Figure 2;

The deck is divided into two types: a piece type and a clip type according to the coupling method. It can be distinguished by the presence or absence of a groove on the side of the deck. A clip-type deck has a groove on the side that can be fixed by inserting a clip, but there is no groove on the side of the piece-type deck.

The piece type has the advantage of being less expensive and sturdy than the clip type, and it is convenient to maintain and manage after construction as only the deck to be repaired can be replaced separately. However, it takes a lot of time to construct, and there is a disadvantage in that it is not good in appearance due to the exposure of piece marks on the outside of the deck after construction.

The clip type has the advantage of being clean in appearance, no damage to the deck, and quick and easy construction because there is no piece mark on the outside of the deck. However, there is a disadvantage that clip costs are added during construction, and the deck is connected with a clip when repairing, so that not only the parts that need repair but also all parts must be lifted.

The synthetic resin deck of the present invention is a clip-type deck, in which a plastic or metal clip is used as a connecting member to join adjacent decks. In the conventional product, the clip is coupled only to the grooves on both sides, and deformation may occur due to a partial step at the bottom, but in the present invention, the lower end of the main body is recessed in a T-shape, so that the clip is connected to the grooves on both sides It is more stable by combining with the recessed part of the.

Figure 4 is a flow chart showing the manufacturing method of the synthetic resin deck of the present invention, Figure 5 is a flow chart showing the manufacturing process of the synthetic resin deck of the present invention.

Referring to Figure 4, the method of manufacturing a synthetic resin deck (S100) includes a raw material blending step (S110), an extrusion molding step (S120), a pressing step (S130), a cooling step (S140), an uneven formation step (S150), cutting and packaging. It includes step S160.

(a) Raw material blending step

85 to 90% by weight of plastic resin containing at least one selected from the group including GPPS, HIPS and EPS, which are raw materials used in the manufacture of synthetic resin decks, 5 to 10% by weight of minerals including stone powder or shellfish powder and calcium carbonate, Add 1 to 3% by weight of additives including UV stabilizers and antioxidants into a blender and mix.

The blended raw material is put into the hopper for the surface layer (①) and the hopper for the body (②). In each hopper, 1 to 3% by weight of a color pigment (master beach) to give a wood texture is added and blended. At this time, the melting temperature is maintained at 140 ~ 160 ℃.

(b) extrusion molding step

Double extrusion technology consisting of an extruder to form the body and an extruder to form a surface layer expressing product design and color is applied, and the blended raw material melted in step (a) is injected into the mold (③). Extruded to form a body and a surface layer.

Specifically, the molten state is maintained at 140~160℃ so that the main body and the surface layer are not separated, and the main body and the surface layer blending material injected into the mold (③) are placed at the top/bottom of the separately manufactured mold (the surface layer is above, the main body is It is extruded through a nozzle connected to the bottom) to form a body and a surface layer.

(c) pressurization step

Pressing is performed using a molding frame (④) to bond the main body and the surface layer and arrange the appearance. The melting temperature of 140~160℃ is maintained so that peeling or defects of the body and the surface layer do not occur.

(d) cooling step

The product is stabilized by lowering the temperature of the deck where the main body and the surface layer are joined in step (c) using the cooling water tank (⑤).

(e) uneven formation step

As the roller (⑥) rotates and drives left and right, it forms a bark pattern that can give a nature-friendly feel to the surface layer of the deck.

The bark pattern is embossed with a thickness of 0.5 to 1.5 mm on a ruler, and an uneven pattern with a depth of 0.5 to 1 mm is formed on the surface of the deck in an engraved form to prevent slipping.

In addition, prior to pattern formation using rollers, the surface temperature of the deck is set to be 120 to 140°C to prevent product deformation and surface pattern crushing by the rollers. At this time, maintaining the temperature can realize a clear pattern of natural wood texture by softening the hardened surface by providing heat with a hot plate.

(f) cutting and packaging steps

Remove foreign substances from the surface with a rotating brush, cut it into a certain length (1.2~2.4m) with a rotating saw, and then load it on a pallet after quality inspection and inspection, and pack it.

Comparative tests were conducted on the quality and performance of the synthetic resin deck of the present invention and the conventional product. The following tests were performed by the Korea Institute of Construction Living Environment Tests (however, <Experimental Example 8> was conducted through a self-test).

Conventional Product 1: Wood Deck

Conventional Product 2: Synthetic resin deck (a deck made of synthetic resin without using wood or wood powder, manufactured by adding TPE-based rubber to synthetic resin)

<Test Example 1> Water absorption rate test

The moisture absorption rate is the rate of weight increase that is increased by absorption of moisture for a specific time in the process of absorbing moisture in the sample.

1-1. Test Methods

In accordance with KS F 3230:3013, the test piece was left in water at 23° C. for 48 hours, and then the water on the surface of the test piece was completely removed, and the mass change was measured.

1-2. Test result

[Table 1] is a result showing the moisture absorption rate of the synthetic resin deck of the present invention and the conventional product.

Test Items The present invention Conventional product 1 Conventional product 2 Moisture absorption rate (weight change) 0.1% 14.7% 1.6%

Referring to the results of [Table 1], the weight change due to moisture absorption of the synthetic resin deck of the present invention is less than that of conventional products. It can be seen that the synthetic resin deck of the present invention has a lower moisture absorption rate than the conventional product, and absorbs less moisture so that there is less change due to moisture.

<Test Example 2> Dimensional stability test

It refers to the property that the dimension or shape of a material does not change in response to environmental changes such as temperature and humidity.

2-1. Test Methods

The sample was tested with the size of the test piece provided. As a test method, it was tested according to KS F 3888-1:2018. Changes in length, width, and thickness were measured to measure the rate of dimensional change.

① Mount for (48±2)h at (70±2)℃, relative humidity (97±5)%.

② Measure the dimensions and calculate the rate of change.

2-2. Test result

[Table 2] is a result showing the change in the length, width, and thickness of the synthetic resin deck of the present invention and the conventional product.

Test Items The present invention Conventional product 1 Conventional product 2 Dimensional change rate (change in length) 0% One% 0% Dimensional change rate (change in width) 0% One% 2% Dimensional change rate (thickness change) 0% 2% One%

Referring to the results of [Table 2], there was a change in length, width, and thickness of the conventional product, but no change occurred in the synthetic resin deck of the present invention. It can be seen that the synthetic resin deck of the present invention has better dimensional stability against environmental changes such as temperature and humidity than conventional products.

<Test Example 3> Dimensional stability condition strengthening test

It was tested by strengthening the conditions in <Test Example 2>.

3-1. Test Methods

The sample was tested with the size of the test piece provided. It was tested in accordance with the dimensional stability test method of KS F 3888-1:2018 5.2.2, but the dimensional change rate was measured by measuring changes in length, width, and thickness according to the following procedure.

① Measure the initial value at room temperature.

② Submerge at (23±2)℃, 48h.

③ (70±2)℃, Relative Humidity (97±5)% Place it for (48±2)h in classical music.

④ Measure the dimensions and calculate the rate of change.

3-2. Test result

[Table 3] is a result showing the change in the length, width, and thickness of the synthetic resin deck of the present invention and the conventional product.

Test Items The present invention Conventional product 1 Conventional product 2 Dimensional change rate (change in length) 0% 3% 2% Dimensional change rate (change in width) 0% 0% One% Dimensional change rate (thickness change) One% 2% One%

Referring to the results of [Table 3], the variation of the length and width of the synthetic resin deck of the present invention is less than that of the conventional product. Therefore, it can be confirmed that the dimensional stability of the synthetic resin deck of the present invention is better than that of the conventional product.

<Test Example 4> Water absorption, dimensional stability test by time slot

The synthetic resin deck of the present invention and the conventional product were immersed in a water tank and the moisture absorption rate, length, width, and thickness were measured at different times.

4-1. Test Methods

It was tested according to the following procedure.

① Pre-treat the sample under conditions of (23±2)℃ and relative humidity (66±5)% until it reaches a constant weight, and then measure the weight (W1), length (L2), width (w2), and thickness (t2). do.

② Immerse the sample in a (70±5)℃ water bath for 2h, 4h, 6h, 8h, 24h, respectively.

③ Immediately immerse the sample after the process of ② in water at (23±2)℃ for 20 minutes, take it out, wipe the surface with a damp cloth to make the surface dry and saturated, and then measure the weight (W2) to 0.01g. .

④ Calculate the water absorption rate according to the formula below and mark it to the second decimal place.

Moisture absorption rate (%) = (W2-W1)/W1 × 100

⑤ After drying the specimen of ② at (70±2)℃ for (24±1)h, measure the length (L2), width (w2), and thickness (t2).

⑥ Calculate the percentage of change in length, width, and thickness, respectively, and indicate to the first digit after the decimal point, and use this as dimensional stability value.

4-2. Test result

[Table 4] is a result showing the moisture absorption rate and dimensional stability according to the time when the synthetic resin deck of the present invention and the conventional product are immersed in a water tank.

Test Items The present invention Conventional product 1 Conventional product 2 Moisture absorption rate -2h 0.06% 14.22% 1.85% Dimensional stability (change in length) -2h 0.0% 0.2% 0.1% Dimensional stability (change in width) -2h 0.0% -3.0% 0.2% Dimensional stability (change in thickness) -2h -0.1% -0.6% -0.2% Moisture absorption rate -4h 0.05% 15.47% 1.98% Dimensional stability (change in length) -4h 0.0% 0.3% 0.1% Dimensional stability (change of width) -4h 0.0% -3.0% -0.2% Dimensional stability (change in thickness) -4h -0.4% -1.3% -0.3% Moisture absorption rate -6h 0.02% 18.18% 2.18% Dimensional stability (change in length) -6h 0.0% 0.3% 0.14% Dimensional stability (change in width) -6h 0.0% -3.5% -0.23% Dimensional stability (change in thickness) -6h -0.1% -3.0% -0.32% Moisture absorption rate -8h 0.08% 20.32% 2.51% Dimensional stability (change in length) -8h 0.0% 0.4% 0.2% Dimensional stability (change of width) -8h 0.0% -3.2% 0.14% Dimensional stability (change in thickness) -8h -0.4% -2.8% -0.3% Moisture Absorption Rate-24h 0.02% 29.96% 2.84% Dimensional stability (change of length)-24h 0.0% 0.3% 0.28% Dimensional stability (change of width)-24h 0.0% -3.3% 0.35% Dimensional stability (change in thickness)-24h 0.3% -2.7% -0.42%

Referring to the results of [Table 4], the moisture absorption rate of the synthetic resin deck of the present invention is smaller than that of the conventional product, so that the change due to moisture absorption is less, and the change in the length, width, and thickness of the synthetic resin deck of the present invention is that of the conventional product. It can be seen that the dimensional stability is better because it is less than the change.

<Test Example 5> Slip resistance (BPN) test

The slip resistance can be said to be a measure of how strong it is to slip. The higher the sliding resistance, the more comfortable and safe sidewalks can be created.

Sliding resistance is expressed through the Sliding Resistance Index (BPN, British Pendulum Number), which refers to the result calculated by the British Pendulum Tester (BPT), an equipment that measures the friction characteristics of the road pavement surface.If the BPN is high Higher means less slippery.

5-1. Test Methods

Test specimens of (1000 × 150) mm in accordance with BS EN 1569:1999, but after repeating 600 times in one direction, visually check for surface damage and other damage.

5-2. Test result

[Table 5] is a result showing the slip resistance (BPN) of the synthetic resin deck of the present invention and the conventional product.

Test Items The present invention Conventional product 1 Conventional product 2 Resistance to track load (150kg. 600 times)-Fine cracking, presence of breakage clear clear clear Slip Resistance(Dry) 97BPN 84BPN 86BPN Slip Resistance(Wet) 56BPN 45BPN 48BPN

Looking at the results in [Table 5], it can be seen that the BPN value of the synthetic resin deck of the present invention is higher than that of the conventional product, so that the sliding resistance is greater. In addition, [Fig. 6] is a table showing the presence or absence of surface destruction and other damage of the synthetic resin deck of the present invention and the conventional product 1, and it can be confirmed that there is no abnormality in the presence or absence of surface destruction and other damage by repeating 600 times at 150 kg.

<Test Example 6> Sliding resistance (CSR) test

For the synthetic resin deck of the present invention and the conventional product, the coefficient of slip resistance (C.S.R; Coefficient of Slip Resistance) was measured.

6-1. Test Methods

It was tested according to KS F 3230:2013.

6-2. Test result

[Table 6] is a result showing the slip resistance of the synthetic resin deck of the present invention and the conventional product.

Test Items The present invention Conventional product 1 Conventional product 2 Slip resistance (C.S.R) 0.65 0.38 0.40

Looking at the results of [Table 5] and [Table 6], it can be seen that the sliding resistance of the synthetic resin deck of the present invention is greater than that of the conventional product, so that it does not slide well on the synthetic resin deck of the present invention than the conventional product.

<Test Example 7> Flexural maximum load test

The flexure test is a measure of how much a test piece can be bent in a suitable way and a material can bend without permanent deformation and destruction. Apply a bending load to the specimen and measure the maximum force that can bend the material without permanently distorting or breaking.

7-1. Test Methods

It was tested according to KS F 3230:2013.

7-2. Test result

[Table 7] is a result showing the maximum flexural load of the synthetic resin deck of the present invention and the conventional product.

Test Items The present invention Conventional product 1 Conventional product 2 Bending load 5422N 4158N 4878N

Looking at the results of [Table 7], it can be seen that the maximum flexural load of the synthetic resin deck of the present invention is greater than that of the conventional product. Therefore, the synthetic resin deck of the present invention can withstand greater force than conventional products without being damaged.

<Test Example 8> Surface peeling phenomenon test

Surface peeling refers to the separation of the surface from the body and coming off. Surface peeling is a common defect that occurs in the process of thermoplastic plastic resins, and occurs because the layers of the resin are not uniformly bonded. Materials containing additives such as flame retardants, accelerators, and colorants can affect surface peeling.

8-1. Test Methods

After mounting under the heat source of the light irradiator, measurements were made at a height of about 300 mm for 10 minutes, 30 minutes, and 60 minutes to check the surface condition of the product. (The pretreatment of the sample is conducted after immersing for 12h and then wiping it with a dry towel.)

8-2. Test result

[Table 8] shows the results of the surface peeling phenomenon test of the synthetic resin deck of the present invention and the synthetic resin deck as a conventional product.

Test Items The present invention Conventional product 2 Peeling phenomenon No surface peeling Occurrence of surface peeling Surface thickness phenomenon No separate thickness division About 2mm 10 minutes - - 30 minutes - Partial lifting of the surface 60 minutes - Surface peeling occurs about 0.5mm

Looking at the results of [Table 8], surface peeling did not occur in the synthetic resin deck of the present invention, but surface peeling occurred in conventional products. [Fig. 7] is a table showing the presence or absence of surface peeling between the synthetic resin deck of the present invention and the conventional product 2, and it can be seen that peeling has occurred on the surface of the conventional product 2.

<Test Example 9> All tests based on synthetic wood

The synthetic resin deck of the present invention was tested against the synthetic wood standard.

9-1. Test Methods

It was tested according to KS F 3230:2013. The test conditions for the amount of formaldehyde emission (emission per 1 liter of air) are as follows.

① Indoor temperature: 20℃±2℃

② Test period: 24 hours

③ Classification of samples: old building materials (150mm × 50mm)

④ Detection limit: HCHO-0.1mg/L

9-2. Test result

[Table 9] shows the results of all tests based on synthetic wood of the synthetic resin deck of the present invention.

Test Items This product importance 0.9 Maximum bending load (support distance = 400mm) 5422N Flexural creep deformation (support distance = 400mm) 0.08% Impact resistance (room temperature condition) clear Impact resistance (low temperature condition) clear Torsion 0.4% Screw retention 987N Slip resistance (C.S.R) 0.65 Moisture absorption rate (weight change: method A) 0.3% Freeze and thaw (maximum flexural load change rate: support distance = 400mm) 98% Formaldehyde emission amount Less than 0.1mg/L As 0.0mg/L CD 0.0mg/L Cr 0.0mg/L Pb 0.0mg/L Hg 0.000mg/L

Looking at the results of [Table 1] to [Table 9], it can be seen that the synthetic resin deck of the present invention has superior performance than conventional products.

As described above, the synthetic resin deck according to the embodiment of the present invention satisfies the quality and performance standards required by conventional flooring materials without using wood or wood powder. Conventional products are manufactured by mixing wood powder and synthetic resins with different properties, so that the density of the product is somewhat lowered, and wood powder absorbs moisture, causing decay and deformation, and harmful substances are generated. However, the synthetic resin deck of the present invention has excellent dimensional stability due to the formation of a dense structure, no harmful components are detected, and it is eco-friendly because it can be recycled using polystyrene, a thermoplastic plastic. The synthetic resin deck of the present invention can be used as a flooring material for walkways, waterfront parks, squares, and terraces for the purpose of landscaping.

Above, the present invention has been described in detail with reference to Examples and Test Examples, but the present invention is not limited to the above embodiments, and can be modified in various forms, within the technical scope of the present invention. It is clear that many variations are possible by those who have the knowledge of. In addition, various types of substitutions, modifications and changes will be possible by those of ordinary skill in the art within the scope not departing from the technical idea of the present invention described in the claims, and this also belongs to the scope of the present invention. something to do.

S100: Manufacturing method of synthetic resin deck
S110: Raw material blending step
S120: Extrusion molding step
S130: pressurization step
S140: cooling stage
S150: uneven formation step
S160: cutting and packing step
①: Hopper for surface layer
②: Main body hopper
③: Mold
④: Molding frame
⑤: cooling water tank
⑥: roller
⑦: Rotary saw
⑧: Synthetic resin deck

Claims (4)

A synthetic resin deck, characterized in that the lower end of the synthetic resin deck body has a T-shaped recessed in the longitudinal direction, and grooves into which the connecting members are inserted to be fixed with the other adjacent decks are formed in the longitudinal direction on both sides.
The method of claim 1,
A synthetic resin deck, characterized in that the uneven pattern of a bark pattern is formed in an intaglio shape having a depth of 0.5 to 1 mm in order to prevent slipping on the surface layer of the body.
The method of claim 1,
85 to 90% by weight of plastic resin, 5 to 10% by weight of stone powder or minerals, 1 to 3% by weight of additives, and 1 to 3% of color pigments,
The plastic resin includes at least one selected from the group including GPPS, HIPS and EPS,
The minerals include shellfish powder and calcium carbonate,
The additive includes a UV stabilizer and an antioxidant,
Synthetic resin deck, characterized in that the color pigment using the master beach.
The method of claim 1,
The synthetic resin deck
(a) mixing the raw materials and putting them into a hopper;
(b) forming a body and a surface layer through a double extrusion technique;
(c) bonding the body and the surface layer by pressing;
(d) stabilizing by lowering the temperature by putting the deck to which the main body and the surface layer are bonded to a cooling water tank;
(e) forming an uneven pattern of a bark pattern on the surface layer of the deck; And
(f) cutting to a certain length with a rotating saw and then packing; is manufactured by a manufacturing method comprising,
The melting temperature of the raw materials in the step (a) is 140 ~ 160 ℃,
The synthetic resin deck, characterized in that the bark pattern is formed by rotating and left-right driving rollers on the surface layer of the deck having a surface temperature of 120 to 140°C in step (e).

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