KR101733178B1 - Flooring including graphine and method for manufacturing thereof - Google Patents

Flooring including graphine and method for manufacturing thereof Download PDF

Info

Publication number
KR101733178B1
KR101733178B1 KR1020160023122A KR20160023122A KR101733178B1 KR 101733178 B1 KR101733178 B1 KR 101733178B1 KR 1020160023122 A KR1020160023122 A KR 1020160023122A KR 20160023122 A KR20160023122 A KR 20160023122A KR 101733178 B1 KR101733178 B1 KR 101733178B1
Authority
KR
South Korea
Prior art keywords
raw material
graphene
base layer
graphite
flooring
Prior art date
Application number
KR1020160023122A
Other languages
Korean (ko)
Inventor
최종식
한성욱
Original Assignee
주식회사 씨앤에이치케어
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 씨앤에이치케어 filed Critical 주식회사 씨앤에이치케어
Priority to KR1020160023122A priority Critical patent/KR101733178B1/en
Application granted granted Critical
Publication of KR101733178B1 publication Critical patent/KR101733178B1/en

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/50—Self-supporting slabs specially adapted for making floors ceilings, or roofs, e.g. able to be loaded
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/52—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits
    • E04C2/521—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling
    • E04C2/525—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling for heating or cooling
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
    • E04F2290/02—Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets
    • E04F2290/023—Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets for heating

Abstract

According to the present invention, a floor material having graphene or graphite comprises: a planar base layer (100) having a plurality of protruding units (110) arranged on an upper surface at constant intervals, having a coupling unit (120) between the protruding units (110), and made of concrete; and a heat conductive layer (200) formed on the upper surface of the base layer (100) in a predetermined thickness, having the same shape with the upper surface of the base layer (100), and having graphene or graphite.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flooring including graphene or graphite,

The present invention relates to a flooring material containing graphene or graphite and a method of manufacturing the same. More specifically, graphene is incorporated into a flooring material to be installed in an Ondol system to improve thermal conductivity, Flooring comprising graphene or graphite in which the floor construction thickness is reduced, and a method of manufacturing the same.

Recently, various technologies utilizing graphene have been developed in various fields. Graphene is a thin film made of carbon atoms, one atom thick. It is a perfect two-dimensional material with a layer thickness of about 0.2 nm. It has high physical and chemical stability. Graphene has excellent properties in electrical conductivity, strength, thermal conductivity and elasticity. Its electric conductivity is 100 times higher than that of commonly used copper, its strength is more than 200 times higher than that of steel, and its thermal conductivity is higher than that of diamond It is a new material with excellent properties such that it is more than 2 times higher and has excellent elasticity and does not lose its electrical properties even if stretched or bent.

Due to the excellent thermal conductivity among the properties of graphene, graphene has recently been used in fields related to heat transfer and storage such as heating. Korean Patent Laid-Open Publication No. 2014-0115174 ("Floor heating structure using thermally conductive cement mortar and method of construction thereof ", 2014.09.30, hereinafter referred to as Prior Art 1) discloses a floor heating structure using a thermally conductive cement mortar ≪ / RTI > 1 is a cross-sectional view of a floor heating structure using a thermally conductive cement mortar as a representative road of the prior art document 1. As shown in FIG. 1, there is an advantage in that the mortar mixed with graphene is placed on the hot water pipe installed in the floor and then cured to transfer the heat generated from the hot water pipe to the bottom surface quickly.

However, the prior art 1 has a problem that the construction period is long and the construction is inconvenient because the concrete should be cured.

Korean Patent Laid-Open Publication No. 2014-0115174 ("Floor heating structure using thermally conductive cement mortar and its construction method ", 2014.09.30.)

Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a floor material containing graphene or graphite according to the present invention and a method of manufacturing the same, Friendly graphene or graphite, and a method for producing the same.

In order to solve the above problems, the graft-containing floor material of the present invention includes a plurality of protrusions 110 spaced apart from each other at a predetermined interval on an upper surface thereof and a coupling portion 120 between the protrusions 110 A base layer 100 formed of a first raw material containing water, purified water sludge, cement, and water; and an upper surface of the base layer 100 formed to have a predetermined thickness on the upper surface of the base layer 100, And a heat conduction layer 200 formed of a second raw material including graphene or graphite.

The weight ratio of the second raw material to the first raw material is 1: 2 to 3.

The floor material containing the graphene or graphite is placed on the construction surface so that the hot water pipe 300 can be seen in a part of the coupling part 120 and another graphene or graphite The protruding portion 110a formed on the included floor material is fitted to the remaining portion of the coupling portion 120 to cover the hot water pipe 300. [

Also, the second raw material is characterized in that 15 to 20 wt% of graphene or graphite is contained when the weight of the second raw material is 100.

The first raw material may further include at least one selected from coal fly ash, iron oxide, clay, silica sand and gravel.

Further, the second raw material is characterized by containing cement, silicon dioxide and pyrophyllite.

The method of manufacturing a floor material including graphene or graphite may further include the step of inserting the first raw material into a mold corresponding to the base layer 100 including the protrusions 110, And the base layer 100 manufactured in the base layer manufacturing step S10 are inserted into the molding die, the second raw material is inserted and diced to form the upper surface of the base layer 100 (S20) for forming the thermally conductive layer (200) on the thermally conductive layer (200).

The weight ratio of the second raw material to the first raw material is 1: 2 to 3.

According to the present invention, since the heat conduction layer is formed to include graphene, the thermal conductivity is increased and the thermal efficiency is improved.

In addition, according to the present invention, the flooring material construction period is shortened because it is formed in a prefabricated manner.

Further, according to the present invention, since it is formed to contain purified water sludge, it is eco-friendly.

1 is a sectional view of a floor heating structure using conventional graphene.
FIG. 2 is a perspective view of a floor material containing graphene or graphite according to the present invention. FIG.
3 is a side cross-sectional view of a floor material containing graphene or graphite according to the present invention.
4 is a top plan view of a flooring comprising graphene or graphite according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a floor material containing graphene or graphite according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view of one embodiment of a floor material 10 including graphene or graphite according to the present invention, FIG. 3 is a side sectional view of an embodiment of a floor material containing graphene or graphite according to the present invention, and FIG. FIG. 2 is a top plan view of an embodiment of a flooring comprising graphene or graphite according to the invention.

As shown in FIGS. 2 and 3, an embodiment of a flooring material containing graphene or graphite according to the present invention includes a base layer 100 and a heat conduction layer 200.

2 to 4, the base layer 100 includes a plurality of protrusions 110 spaced apart from each other at a predetermined interval on an upper surface thereof and a coupling portion 120 between the protrusions 110.

The projecting portion 110 and the coupling portion 120 are configured to sandwich the hot water pipe 300 to be described later and to join the grounding material with other graphene or graphite. The base layer 100 formed with the projecting portion 110 and the engaging portion 120 is formed of a first raw material containing purified water sludge, cement and water, and as shown in FIGS. 2 and 3, Shape.

As shown in FIGS. 2 and 4, in one embodiment of the present invention, the protrusions 110 are formed to have rounded corners And is arranged in a rotated state so as to be rhombic.

The engaging portion 120 is a space surrounded by the protruding portion 110 and is a space surrounded by the four protruding portions 110 as shown in FIGS. 2 and 4. The cross- And has a shape similar to that of the cross section of the substrate 110.

Since the cement and water in the first raw material are raw materials for concrete, the first raw material is formed of concrete and purified water sludge. The purified water sludge is a residue that is precipitated or detained in a sediment and backwash process which is a water treatment process. Since the water sludge has a high water content, it is inconvenient for the filling operation. Therefore, I used to be. Generally, the purified sludge generated in the purification process contains 80% or more of silicon and alumina components in silicon (SiO2), alumina (Al2O3), potassium oxide (CaO) and iron oxide (Fe2O3) Is usually 69 to 87%. Therefore, it can be recycled as the material of the first raw material, which is produced by mixing cement and water, and thus has an eco-friendly effect.

In Korea, especially in Seoul, advanced water treatment methods are used as water treatment methods. The advanced water treatment process is the addition of ozone sterilization and granular activated carbon (charcoal) to the existing water treatment process to completely treat microorganisms such as taste, smell and disinfection by-products This is a way to produce cleaner tap water. The granular activated carbon burns coconut shells, trees and the like, and the coconut shell and the coconut charcoal burned with wood occupy most of the components of the purified water sludge. The coconut charcoal is also a material having a higher thermal conductivity than concrete, and the first raw material including the coconut charcoal also has an effect of improving the thermal conductivity, and is a material bonded to the flooring material.

The first raw material may further include at least one material selected from coal fly ash, iron oxide, clay, silica sand and gravel. The above-mentioned materials that can be included in the first raw material are materials that determine the properties of the first raw material, and one or more of the above-described materials may be included in the first raw material depending on the situation.

That is, the base layer 100 is a body of a floor material containing graphene or graphite according to the present invention, and is constructed by mixing purified sludge with a conventional prefabricated floor material. The thermal conductivity of the base layer 100 is determined by graphene And is similar to the conventional one.

3, the thermally conductive layer 200 is formed to have a predetermined thickness on the upper surface of the base layer 100 and is formed in the same shape as the upper surface of the base layer 100, And is formed of a second raw material containing graphite.

The second raw material includes the above-mentioned graphene or graphite and cement, silicon dioxide and pyrophyllite. Since graphene is a material having a very high thermal conductivity as described above in the Background Art and graphite is a material having a high thermal conductivity, the efficiency of heat transfer is improved and the heating efficiency is improved.

The weight ratio of the first raw material and the second raw material is 2 to 3 when the weight of the second raw material is 1. In one embodiment of the present invention, the weight ratio of the first raw material to the second raw material is 70 to 30, and when the weight of the second raw material is 1, the weight of the first raw material is about 2.3.

The amount of graphene or graphite contained in the second raw material is 15 to 20 in terms of the weight of graphene or graphite when the weight of the second raw material is 100.

As shown in FIG. 3, the thermally conductive layer 200 is formed on the upper surface of the base layer 100 to have a predetermined thickness upward. The thermally conductive layer 200 is formed on the upper surface of the base layer 100, and thus is formed on the upper surface of the protrusion 110 and is not formed on the side surface.

3 and 4, the hot water pipe 300 is fitted into the gap between the protrusions 110, that is, the fitting portion 120. [ The hot water pipe 300 shown in FIG. 3 has one pipe bent in a U-shape, but a plurality of hot water pipes may be fitted, and other hot water pipes may be fitted.

The flooring material containing graphene or graphite according to the present invention may be bonded to another flooring material containing graphene or graphite. For ease of explanation, the flooring material shown on the left side of FIG. 4 is referred to as a first flooring material 11 ), And the flooring material shown on the right side is referred to as the second flooring material 22. 4 is a schematic view of a floor material including a graphene or graphite according to the present invention. The second floor material 220, which is fitted around the hot water pipe 300 fitted in the first floor material 11, Only the protruding portion 110 will be described.

As shown in FIG. 4, the protrusions 110 are spaced apart from each other at a predetermined interval in the first bottoms 11. The hot water pipe 300 is fitted in the first floor member 11 to the joint portion 120 surrounded by the gap between the protrusions 110 or the protrusion 110 as described above. The second bottom member 22 is engaged with the first bottom member 11 so that the protrusion 110a formed on the second bottom member 22 is engaged with the coupling portion 120 formed on the first bottom member 11, do. The protruding portion 110 formed on the first bottom material 11 is coupled to the coupling portion formed on the second bottom material 22.

It should be noted that since the protrusion 110a formed in the second bottom material 22 is not required to be inserted into the coupling part 120 in which the hot water pipe 300 is inserted, The protrusions 110a corresponding to the protrusions 120 may not be formed or may be formed to have a height lower than that of the protrusions 110. The protrusions 110 may be formed to have a height lower than that of the protrusions 110,

The first floor material 11 is easily combined with the second floor material 22 while the hot water pipe 300 is inserted. The first bottom material 11 and the second bottom material 22 are formed in advance, thereby reducing the construction time.

When the floor member is vertically coupled with the hot water pipe 300 in the middle as described above, the two heat conductive layers 200 are positioned at the center, and the two base layers 100 are positioned on the heat conductive layer 200 And a shape located in the vertical direction. The heat conduction layer 200 includes graphene or graphite and has a good thermal conductivity. The base layer 100 also includes purified water sludge, and thus has a high thermal conductivity to increase the heating efficiency.

The present invention has been described with respect to a floor material containing graphene or graphite according to the present invention, and a method of manufacturing the flooring material containing graphene or graphite will be described below.

The method for manufacturing a flooring material containing graphene or graphite according to the present invention includes a base layer forming step (S10) and a heat conduction layer forming step (S20).

In the base layer forming step (S10), the base material 100 is formed by inserting the first raw material into a forming mold corresponding to the base layer 100 including the protrusion 110, and inserting the first raw material.

The heat conduction layer forming step S20 may be performed by inserting the second raw material into the molding die while inserting the base layer 100 manufactured in the base layer manufacturing step S10 into the molding die, The heat conduction layer 200 is formed.

As described above, the weight ratio of the first raw material and the second raw material used in the base layer forming step (S10) and the heat conduction layer forming step (S20) is such that when the weight of the second raw material is 1, In one embodiment of the present invention, the weight of the first raw material is about 2.3, the weight of the first raw material is about 70% of the total weight, So that the weight of the second raw material is 30% of the total weight.

Between the base layer forming step (S10) and the heat conduction layer forming step (S20), it is necessary to cure each side. The reason why the base layer 100 and the heat conduction layer 200 are separately formed is to mix the graphene or the graphite only with the heat conduction layer 200 that needs to transmit heat to increase the thermal conductivity and reduce the cost.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention as defined by the appended claims.

10: Flooring including graphene
11: First flooring
12: Second flooring
100: base layer
110: protrusion
120:
200: heat conduction layer
300: Hot water pipe
S10: base layer formation step
S20: Heat conduction layer formation step

Claims (8)

A plurality of protrusions 110 spaced apart from each other at a predetermined interval on the upper surface thereof and a coupling portion 120 between the protrusions 110 and formed of a first raw material containing purified water sludge, A base layer 100; And
A heat conductive layer 200 formed to have a predetermined thickness on the upper surface of the base layer 100 and formed in the same shape as the upper surface of the base layer 100 and formed of a second raw material containing graphene or graphite, ;
(11) and a second bottom (22), wherein the first bottom (11) and the second bottom (22)
The height of the first floor member 11 is determined such that the height of the protrusion of the first floor member 11 and the height of the heat conduction layer is greater than the height of the first floor member 11, Is higher than the hot water pipe (300)
The second bottom member 22 is formed such that the protrusion 110a formed on the second bottom member 22 is fitted to the remaining engaging portion 120 of the first bottom member 11 where the hot water pipe 300 is not fitted, The protrusion 110a of the second bottom material 22 corresponding to the hot water pipe 300 which is a part of the coupling part of the first bottom material 11 is not formed or is lower than the protrusion of the other second floor material 22 ,
Flooring material characterized by graphene or graphite.
The method according to claim 1, wherein the weight ratio of the second raw material to the first raw material is
1: 2 to 3, based on the weight of the graphene or graphite.
delete The method according to claim 1, wherein the second raw material
And graphene or graphite is contained in an amount of 15 to 20 wt% based on 100 wt% of the second raw material.
The method according to claim 1, wherein the first raw material
Which further comprises at least one selected from the group consisting of fly ash, iron oxide, clay, silica sand and gravel.
The method according to claim 1, wherein the second raw material
A flooring comprising graphene or graphite, characterized in that it comprises cement, silicon dioxide and pyrophyllite.
A process for producing a flooring comprising graphene or graphite according to claim 1,
A base layer forming step (S10) of forming the base layer (100) by inserting and drawing the first raw material into a forming mold corresponding to the base layer (100) including the protruding portion (110); And
In the state where the base layer 100 manufactured in the base layer manufacturing step S10 is put in the molding mold, the second raw material is inserted and then formed to form the thermally conductive layer 200 on the upper surface of the base layer 100 Forming a heat conduction layer (S20);
≪ / RTI > wherein the graphene or graphite-containing flooring material comprises graphene or graphite.
The method according to claim 7, wherein the weight ratio of the second raw material to the first raw material is
1 < / RTI >: 2 to 3. < Desc / Clms Page number 13 >
KR1020160023122A 2016-02-26 2016-02-26 Flooring including graphine and method for manufacturing thereof KR101733178B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160023122A KR101733178B1 (en) 2016-02-26 2016-02-26 Flooring including graphine and method for manufacturing thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160023122A KR101733178B1 (en) 2016-02-26 2016-02-26 Flooring including graphine and method for manufacturing thereof

Publications (1)

Publication Number Publication Date
KR101733178B1 true KR101733178B1 (en) 2017-05-08

Family

ID=60163722

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160023122A KR101733178B1 (en) 2016-02-26 2016-02-26 Flooring including graphine and method for manufacturing thereof

Country Status (1)

Country Link
KR (1) KR101733178B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107605120A (en) * 2017-09-30 2018-01-19 戴明 A kind of graphene intelligence self-heating floor special connecting piece and its manufacture method
CN107631344A (en) * 2017-09-30 2018-01-26 戴明 Graphene self-heating floor and manufacture method and low-voltage self-heating floor system
CN107740555A (en) * 2017-10-12 2018-02-27 江苏洛基木业有限公司 A kind of pavement and its spelling button method for paving

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101122781B1 (en) 2011-05-23 2012-03-23 강주형 Flooring having an improved efficiency of thermal diffusion
KR101188283B1 (en) * 2012-02-03 2012-10-15 한국수자원공사 Building interior materials having a agalmatolite and loess mixed with a sludge produced from water treatment plant, preparation method thereof and preparation apparatus thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101122781B1 (en) 2011-05-23 2012-03-23 강주형 Flooring having an improved efficiency of thermal diffusion
KR101188283B1 (en) * 2012-02-03 2012-10-15 한국수자원공사 Building interior materials having a agalmatolite and loess mixed with a sludge produced from water treatment plant, preparation method thereof and preparation apparatus thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107605120A (en) * 2017-09-30 2018-01-19 戴明 A kind of graphene intelligence self-heating floor special connecting piece and its manufacture method
CN107631344A (en) * 2017-09-30 2018-01-26 戴明 Graphene self-heating floor and manufacture method and low-voltage self-heating floor system
CN107605120B (en) * 2017-09-30 2023-05-16 戴明 Special connecting piece for graphene intelligent self-heating floor and manufacturing method thereof
CN107631344B (en) * 2017-09-30 2023-05-16 戴明 Graphene self-heating floor, manufacturing method and low-voltage self-heating floor system
CN107740555A (en) * 2017-10-12 2018-02-27 江苏洛基木业有限公司 A kind of pavement and its spelling button method for paving

Similar Documents

Publication Publication Date Title
KR101733178B1 (en) Flooring including graphine and method for manufacturing thereof
Ivanov et al. Diatomite and its applications.
KR101787114B1 (en) Process for the production and treatment of graphite powders
KR101787326B1 (en) Method for Manufacturing A Bed With Elvan And Red Clay
KR101983318B1 (en) Flooring board and manufacturing method of the same that
KR102005328B1 (en) Method for manufacturing precast concrete base structure of soundproof wall utilizing siliceous slag binder
CN103896603A (en) Refractory castable material for salt chlorinator, preparation method and application thereof
KR101733191B1 (en) manufacturing method for sidewalk block including and the sidewalk block by thereof
CN105033228A (en) Abrasion-resistant block for protecting digging bucket and preparation method thereof
KR100659738B1 (en) Multipurpose ceramic composition and usage thereof
KR101224531B1 (en) Constructing structure an underfloor-heating room has ondol-floor formation with brick formation and pellet formation
KR101760216B1 (en) Method for manufacturing fly-ash foaming body sidewalk-block, and the fly-ash foaming body sidewalk-block manufactured by the method
KR20190002948U (en) Heating construction blocks panel
KR101571799B1 (en) The anti-weed block structure
CN205774042U (en) A kind of flat glass furnace fining end pond bottom structure
KR100830806B1 (en) Revetment block and porous block and composition of block with loess ball and active carbon ball
KR100690947B1 (en) Walking Block
CN104324554A (en) High-thermal conductivity graphene composite heat conducting filter material
KR101559553B1 (en) Panel for salt field and manufacturing method of it
KR100704740B1 (en) Boards assembly of a floor heater for laying a hot-water supply pipe
CN202039095U (en) Stainless steel continuous bright annealing furnace
KR20090102516A (en) Insulative yellow soil brick and a construction method for insulative wall using them
KR100193959B1 (en) Building material containing vermiculite and its manufacturing method
KR101542823B1 (en) A heating panel for bidet
KR200162579Y1 (en) Heating panel made by the soil

Legal Events

Date Code Title Description
GRNT Written decision to grant