KR20210033080A - Architectural flooring with improved interlayer noise reduction and thermoelectric effect and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a floor material manufacturing method with reduction of an interlayer noise and improved heat transmission. The present invention mixes graphite powder with ethlene-vinyl acetate (EVA) to form a mixed layer and enables a plywood layer and a decoration layer to be stacked by layers to reduce an interlayer noise and improve heat transmission. The present invention fuses the EVA with graphite to manufacture the floor material to reduce the interlayer noise, has excellent indoor heating, and be environmentally-friendly.

Description

TECHNICAL FIELD [Architectural flooring with improved interlayer noise reduction and thermoelectric effect and manufacturing method thereof]

The present invention relates to a method for manufacturing floor materials for construction with improved interlayer noise reduction and heat transfer, and by mixing graphite powder and EVA to form a mixed layer, and by stacking a plywood layer and a decorative layer, interlayer noise is reduced and heat transfer is achieved. It relates to an improved architectural flooring material and a method of manufacturing the same.

There are currently commercially available indoor flooring materials for buildings such as stucco wood flooring, PVC sheets (also known as floor coverings), PVC tiles, and stone tiles, each of which has various weaknesses in "interlayer noise, eco-friendliness, heat transfer, and durability."

The stucco wooden floor board is divided into a steel floor and a reinforced floor, and the steel floor maintains a stable quality by using plywood on the bottom surface, and it is currently used most often, but there is a problem that the effect of reducing interlayer noise is insufficient.

Reinforced flooring has higher strength of raw materials, lower price, and more effect of reducing interlayer noise compared to other products, but there is a problem that swelling occurs due to moisture, and heating cost increases due to reduction of thermal conductivity by PE foam installed at the bottom.

Solid wood flooring creates a stable and luxurious indoor atmosphere, but the rate of defects is high due to contraction and expansion due to changes in ambient temperature and humidity at high prices. In the case of PVC-based flooring, the price is low and easy to install, but volatile substances due to heat are generated. There is a problem in that the contraction expansion deformation caused by heat is largely generated.

In addition, stone flooring can create a luxurious and luxurious indoor atmosphere, but it is expensive, has poor workability, whitening occurs, defect repairability and heat transfer are poor, so heating costs rise, and the surface hardness is large and slippery, so there is a risk of safety accidents.

As described above, the indoor flooring materials for buildings currently in use have problems such as lack of reduction of inter-floor noise, lack of heat transfer, or harmfulness.

Korean Patent Registration No. 10-0730542 (2007.06.14) Korean Patent Registration No. 10-1622696 (2016.05.13)

An object of the present invention is to reduce interlayer noise by fusing foamed EVA (Ethlene-Vinyl Acetate) and graphite to produce a flooring material, and to produce a good indoor heating and eco-friendly construction flooring material.

In order to solve the above problem, the present invention includes a mixed layer 100 formed in a plate shape having a predetermined area; A plywood layer 200 formed on the upper surface of the mixed layer 100; Including; a decorative layer 300 formed on the upper surface of the plywood layer 200; wherein the mixed layer 100 is formed of an ethylene vinyl acetate test copolymer (EVA) material and graphite powder. With flooring,

A primary blend manufacturing step (S1) of preparing a primary blend by mixing an ethylene vinyl acetate test copolymer (EVA) and graphite powder in a predetermined ratio; After mixing ethylene vinyl acetate (EVA) and low-density polyethylene (LDPE) resin in a predetermined ratio, it is added to a roll mixer at a predetermined temperature, and then roll-mixed (S2). ); The primary blend prepared through the primary blend manufacturing step (S1) is added to a roll mixer at a predetermined temperature, melted and kneaded by roll mixing, and then, through the secondary blend manufacturing step (S2). A tertiary blend manufacturing step (S3) of preparing a tertiary blend by mixing with the prepared secondary blend and adding other additives to mix; Ethylene vinyl acetate test is conducted by pressing the tertiary blend prepared through the tertiary blend manufacturing step (S3) and cutting it into a sheet of a predetermined size, overlapping the cut sheet form with a predetermined number of layers, and pressing it with a hot press to adhere. A mixed layer manufacturing step (S4) of preparing a mixed layer 100 including coalescence (EVA) and graphite powder; A primary bonding step (S5) of applying an adhesive between the decorative layer 300 having a predetermined thickness and the plywood layer 200 having a predetermined thickness and then pressing the adhesive for a predetermined time (S5); After applying an adhesive on the top of the plywood layer 200 of the decorative layer 300 and the plywood layer 200 joined through the first bonding step (S5), by using a hot pressure press on the top of the plywood layer 200 Secondary bonding step (S6) for bonding the mixed layer 100; and a method of manufacturing a floor covering for construction with improved heat transfer and reduced noise between layers,

In the first compound manufacturing step (S1), an ethylene vinyl acetate test copolymer (EVA) and graphite are mixed in a ratio of 50:50 to prepare a first compound, and the second compound manufacturing step (S2) is performed by ethylene. After mixing the vinyl acetate copolymer (EVA) and the low-density polyethylene (LDPE) resin in a ratio of 50:5, roll-mixing in a roll mixer at 50 to 120 degrees, and the second bonding step (S6) is performed by using a hot pressure press. It provides a method of manufacturing a floor material for construction with improved interlayer noise reduction and heat transfer, characterized in that it proceeds for 30 to 80 minutes at 100 to 170 degrees at a pressure of ~170kg/cm ^2.

The present invention can reduce interlayer noise by fusing foamed EVA (Ethlene-Vinyl Acetate) and graphite to manufacture a flooring material, and it is possible to produce a good indoor heating and eco-friendly construction flooring material.

1 is a view related to the flooring material for construction of the present invention.
Figure 2 is an exploded view of the floor material for construction of the present invention.
Figure 3 is a flow chart related to the method of manufacturing a floor material for construction of the present invention.
4 is a reference material for the contents of Table 4.

Terms or words used in this specification and claims are not to be construed as being limited to their usual or dictionary meanings, and that the inventors can appropriately define the concept of terms in order to describe their invention in the best way. Based on the principle, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a floor material for construction with improved heat transfer and noise reduction between floors, and a method of manufacturing the same.

Regarding the building floor material 1000 of the present invention, referring to FIGS. 1 and 2, the building floor material 1000 of the present invention includes a mixed layer 100, a plywood layer 200, and a decorative layer 300. .

Each component is described as follows.

The mixed layer 100 is formed by including an ethylene vinyl acetate test copolymer (EVA) material, graphite powder, and other additives, and is formed in a plate shape having a predetermined area.

EVA is an abbreviation of ethylene-vinyl-acetate, and it is a resin that foams and molds in the middle between rubber and PVC, and has excellent buffering power and excellent shock absorption. In addition, it does not use plasticizers that make PVC flexible, and it is characterized by almost no deformation such as contraction and expansion.

Graphite is a material that exists abundantly in nature and has excellent conductivity even with a small amount of content. Such graphite has high thermal safety and corrosion resistance, so it is a safe material to be used in buildings used by humans.

Other additives include low-density polyethylene (LDPE) resin, dicumyl oxide (DCP), and a foaming agent.

Examples of the blowing agent include ammonium-based ammonium carbonate and carbonamide-based azodicarbonamide, and these blowing agents include low-density polyethylene along with silicone oil as a stabilizer, hydroperoxide as a crosslinking agent, and alkylbenzenesulfonate as a surfactant. When the flame retardant is mixed and foamed, the outflow of gas is minimized while cross-linking and fusion are carried out.

The present invention makes it possible to increase thermal stability and reduce interlayer noise by using the mixed layer 100 including ethylene vinyl acetate copolymer (EVA) and graphite.

The plywood layer 200 is formed on the upper surface of the mixed layer 100.

Plywood is an engineered wood manufactured by making wood into thin plates, that is, veneers and laminating and bonding them in odd numbers so that the fiber directions are perpendicular to each other. It has advantages such as temperature/humidity control function, excellent strength performance, and difficulty in causing splitting or deformation, and in particular, it can be used for a long time without deformation due to its high dimensional stability compared to general wood.

The plywood layer 200 may be used by cutting the plywood into various shapes and sizes. The plywood layer may have a triangular shape, a square shape, or a hexagonal shape. The plywood is preferably an eco-friendly plywood.

The decoration layer 300 is formed on the upper surface of the plywood layer 200.

The decoration layer 300 forms an exterior layer that truly and freely represents the appearance of wood of the flooring material, and may use a veneer mainly wood veneer, a transfer printing layer, or impregnated paper impregnated with resin.

The building floor material 1000 is formed to a thickness of 7.0 to 10.0T, but preferably has a thickness of 9.0 to 10.0T, and the mixed layer 100 is formed to a thickness of 3T, and an engineering layer on top of the mixed layer 100 The plywood layer 200 is formed of 5.0-7.0T to have stability and play a role of the mechanical center of the product, and the thick and high-strength decorative layer 300 is formed on the top of the plywood layer 200 to a thickness of 0.5-1.0T. By being formed, it has the advantage of securing high durability, contamination resistance, and maintenance.

The T represents a thickness unit and is 1T=0.1mm.

Referring to Figure 3 to explain the sequence of the manufacturing method of the flooring material for construction (1000), the manufacturing method of the building flooring material of the present invention is a primary blend manufacturing step (S1), a secondary blend manufacturing step (S2), tertiary blend manufacturing It proceeds including step (S3), mixed layer manufacturing step (S4), primary bonding step (S5), and secondary bonding step (S6).

Each step will be described in detail as follows.

S1) 1st blend manufacturing step

The primary blend manufacturing step (S1) is a step of preparing a primary blend by mixing and mixing ethylene vinyl acetate copolymer (EVA) and graphite in a predetermined ratio.

Preferably, this is a step of preparing a primary compound by mixing EVA and graphite in a ratio of 50:50.

S2) Secondary compound manufacturing step

In the second blend manufacturing step (S2), an ethylene vinyl acetate test copolymer (EVA) and a low density polyethylene (LDPE) resin are mixed in a predetermined ratio, and then added to a roll mixer at a predetermined temperature, followed by roll mixing. ).

The second blend manufacturing step (S2) is a step of mixing EVA and LDPE in a ratio of 50:5 and then rolling in a roll mixer at 50 to 120 degrees, and preferably performing roll mixing with a roll mixer at 90 to 100 degrees.

S3) Tertiary compound manufacturing stage

In the third blend manufacturing step (S3), the first blend prepared through the first blend manufacturing step (S1) is added to a roll mixer at a predetermined temperature, melted and kneaded by roll mixing, and then 2 This is a step of preparing a tertiary blend by mixing with the secondary blend prepared through the tea blend manufacturing step (S2), and adding other additives to mix.

S4) Mixed layer manufacturing step

In the mixed layer manufacturing step (S4), the tertiary compound prepared through the tertiary compound manufacturing step (S3) is pressed and cut into a sheet shape of a predetermined size, and the cut sheet type is overlapped with a predetermined number of layers and pressed with a hot press. This is a step of manufacturing the mixed layer 100 including EVA and graphite powder by bonding.

S5) 1st bonding step

The first bonding step (S5) is a step of applying an adhesive between the decorative layer 300 having a predetermined thickness and the plywood layer 200 having a predetermined thickness and then pressing the adhesive for a predetermined time.

In the first bonding step (S5), a 0.5-1.0T decorative layer 300 and a 5.0-7.0T plywood layer 200 are prepared and the two are adhered.

S6) Second bonding step

In the second bonding step (S6), after applying an adhesive on the upper part of the plywood layer 200 of the decorative layer 300 and the plywood layer 200 combined through the first bonding step (S5), This is a step for adhering the mixed layer 100 to the upper part of the mixed pop layer 200.

The secondary bonding step (S6) is performed for 30 to 80 minutes at 100 to 170 degrees at a pressure of ^{120 to 170 kg/cm 2} , and preferably 45 to 60 at 130 to 140 degrees at a pressure of ^{140 to 150 kg/cm 2} Proceed for a minute.

The results of testing the characteristics of the flooring material 1000 for construction of the present invention manufactured through each step as described above are as follows.

The following is about the results of measuring the thermal conductivity of products manufactured by mixing the components of graphite slightly differently.

Degree Material/factor A type B type C type -First powder Heat pressure Roll mixing → Solid phase mixing Primary EVA Resin 50 50 50 Graphite powder D1 50 - - Graphite powder D2 - 50 - Graphite powder D3 - - 50 Sum 100 100 100 -Solid phase+other powder+ Heat pressure Roll mixing Formulation+ Heat pressure Press → EVA +graphite Foam Secondary ① EVA Resin 50 50 50 LDPE 5 5 5 ② The dough form of the 2nd ① 55 55 55 Primary solid phase 10 10 10 ③ Foaming agent (other additives) 1.9 1.9 1.9 DCP (other additives) 0.44 0.44 0.44 Sum 67.34kg(②+③) 67.34㎏(②+③) 67.34㎏(②+③)

(Unit: kg)

-Graphite powder D1: Graphite purity 99%, powder size 9㎛

-Graphite powder D2: Graphite purity 99%, powder size 7㎛

-Graphite powder D3: Graphite purity 97%, powder size 149㎛

Table 1 shows the amount of each component for manufacturing the architectural flooring 1000 by varying the components of the graphite powder and the size of the powder.The manufacturing method for each example of the A type product, B type product, and C type product is same.

Sample and analysis Gangmaru 8.0T Plain-
EVA (3T) A type (3T) B type (3T) C type (3T) Thermal conductivity
(W/mk) 0.067 0.047 0.069 0.066 0.061

1) Analysis sample: Gangmaru 8.0T (plywood 7T), Plain-10T (Plain EVA 3T, plywood 7T),

Prototype total thickness 10T (plywood 7T) -> A type (3T), B type (3T), C type (3T)

2) Analysis sample size: 300×300×30~32㎜

3) Analysis environment: Thermal conductivity (plate heat flow meter method), temperature 23±2℃, humidity 50±10%

[Table 2] analyzes the thermal conductivity of commercially available floorboards, floorboards containing only EVA, and floorboards of type A, type B, and type C manufactured through the mixing ratio of [Table 1] as in the present invention. It is the result.

As a result of conducting a thermal conductivity test with the prototype and the floorboard with EVA foam laminated on the basic plywood, and the floorboard with the general plywood, the prototype A type was the highest as 0.069W/mk, and the second floorboard with general plywood, Gangmaru. Was found to be 0.067W/mk. On the other hand, the floorboard laminated with Plain-EVA(3T) on the general plywood was 0.047W/mk, which was lower than that of the prototype test piece.

The prototype is considered to be very close to the goal of improving the thermal conductivity, which is one of the main concepts of this technology development, as a result of the same difference in the thermal conductivity of the general plywood applied floor. When only EVA is laminated, it is possible to reduce interlayer noise, but since it is a factor that hinders heat conduction itself, it could not be expected to increase the heating effect. However, the prototype is expected to be an opportunity to change general consumer perception by securing a thermal conductivity similar to that of a general floorboard along with basic interlayer noise reduction.

However, since it is a test conducted with each laminated veneer in an accredited laboratory, it is believed that there will be a slight difference from the actual heating effect, but the results alone are considered to be of sufficient value.

sample unit result Environmental standards Total Volatile Organic Compounds (TVOC) mg/m ² *h 0.004 Residential: 0.10 or less
Non-residential use: 0.20 or less toluene mg/m ² *h Not detected 0.080 or less Formaldehyde mg/m ² *h 0.001 0.013 or less

[Table 3] shows the environmental test results of the prototype of the present invention, and is a table that analyzes whether or not it falls within the range of environmental standards using total volatile organic compounds (TVOC), toluene, and formaldehyde as samples, respectively.

-Purpose: To comply with the indoor air quality legal standards, we conduct an environmental test of the prototype to test the indoor air quality as a product and determine whether eco-friendly materials are suitable.

-Test sample: Prototype (decorative wood-elastic floor-EVA + graphite foam layer 5T applied)

-Analysis environment: Small chamber method (emission amount after 7 days), proceed with the thickest test piece

It was found that TVOC, toluene, and formaldehyde of the prototype tested according to the environmental test analysis conditions according to the table of FIG. 4 had very superior performance than the standard. In particular, TVOC for residential use is less than 0.10 mg/m²*h, but the prototype is at a very low level as 0.004mg/m²*h. In particular, undetected toluene and 0.001mg/m²*h formaldehyde are incomparable with other products. It is judged to be an excellent eco-friendliness.

product Commercial products A type (3T) A type (T5) Average (dB) 58.2 50.5 50.8

[Table 4] is a table of the test results for the amount of light-weight floor impact sound reduction.

[Table 4] is the result of comparing the floor impact sound of commercial products with A type (3T) and A type (5T) by varying the thickness of the A type with the highest thermal conductivity.

By law, it was specified to have a floor impact sound of 58 dB or less, and in the case of commercial products, the numerical value is located at the boundary line of 58 dB, but it was confirmed that a value of 51 dB or less appears in the case of a flooring material containing graphite as in the present invention.

As described above, the flooring material for construction 1000 manufactured through the present invention has an effect of reducing sufficient thermal conductivity and floor impact sound, and has an eco-friendly advantage because harmful components are reduced compared to existing values.

The embodiments described in the present specification and the configurations shown in the drawings as described above are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention, so various equivalents and modifications that can replace them It should be understood that there may be examples.

1000 Architectural Flooring
100 mixed layers
200 plywood layer
300 stucco floor

Claims (3)

A mixed layer 100 formed in a plate shape having a predetermined area;
A plywood layer 200 formed on the upper surface of the mixed layer 100;
Including; a decorative layer 300 formed on the upper surface of the plywood layer 200,
The mixed layer 100 is
Flooring for construction, characterized in that it is formed by including an ethylene vinyl acetate test copolymer (EVA) material and graphite powder. A primary blend manufacturing step (S1) of preparing a primary blend by mixing an ethylene vinyl acetate test copolymer (EVA) and graphite powder in a predetermined ratio;
After mixing ethylene vinyl acetate (EVA) and low-density polyethylene (LDPE) resin in a predetermined ratio, it is added to a roll mixer at a predetermined temperature, and then roll-mixed (S2). );
The primary blend prepared through the primary blend manufacturing step (S1) is added to a roll mixer at a predetermined temperature, melted and kneaded by roll mixing, and then, through the secondary blend manufacturing step (S2). A tertiary blend manufacturing step (S3) of preparing a tertiary blend by mixing with the prepared secondary blend and adding other additives to mix;
Ethylene vinyl acetate test is conducted by pressing the tertiary blend prepared through the tertiary blend manufacturing step (S3) and cutting it into a sheet of a predetermined size, overlapping the cut sheet form with a predetermined number of layers, and pressing it with a hot press to adhere. A mixed layer manufacturing step (S4) of preparing a mixed layer 100 including coalescence (EVA) and graphite powder;
A primary bonding step (S5) of applying an adhesive between the decorative layer 300 having a predetermined thickness and the plywood layer 200 having a predetermined thickness and then pressing the adhesive for a predetermined time (S5);
After applying an adhesive on the top of the plywood layer 200 of the decorative layer 300 and the plywood layer 200 joined through the first bonding step (S5), by using a hot pressure press, on the top of the plywood layer 200 Secondary bonding step (S6) for bonding the mixed layer 100; A method of manufacturing a floor material for construction with improved interlayer noise reduction and heat transfer properties. Ethylene vinyl acetate test copolymer (EVA) and graphite in a ratio of 50:50 by mixing and mixing to prepare a primary mixture (S1);
Manufacture of a secondary compound that mixes ethylene vinyl acetate copolymer (EVA) and low density polyethylene (LDPE) resin in a ratio of 50:5 and then puts it into a roll mixer at 50 to 120 degrees for roll mixing. Step S2;
The primary blend prepared through the primary blend manufacturing step (S1) is added to a roll mixer at a predetermined temperature, melted and kneaded by roll mixing, and then, through the secondary blend manufacturing step (S2). A tertiary blend manufacturing step (S3) of preparing a tertiary blend by mixing with the prepared secondary blend and adding other additives to mix;
After pressing the tertiary blend prepared through the tertiary blend manufacturing step (S3), it is cut into a sheet of a predetermined size, and the cut sheet forms are overlapped with a predetermined number of layers and pressed with a hot press to adhere to EVA and graphite powder. A mixed layer manufacturing step (S4) of manufacturing a mixed layer 100 including;
Primary bonding of preparing a 0.5~1.0T decorative layer 300 and a 5.0~7.0T plywood layer 200, applying an adhesive between the decorative layer 300 and the plywood layer 200, and pressing for a predetermined period of time. Step S5;
After applying an adhesive on the top of the plywood layer 200 of the decorative layer 300 and the plywood layer 200 joined through the first bonding step (S5), by using a hot pressure press on the top of the plywood layer 200 Secondary bonding step (S6) for bonding the mixed layer 100;
The secondary bonding step (S6) is a method of manufacturing a floor material for construction with improved interlayer noise reduction and heat transfer, characterized in that it proceeds for 30 to 80 minutes at 100 to 170 degrees at a pressure of 120 to 170kg / cm2.

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