KR19990047017A - Electromagnetic Wave Absorption and Far Infrared Radiant Manufacturing Method - Google Patents

Electromagnetic Wave Absorption and Far Infrared Radiant Manufacturing Method Download PDF

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KR19990047017A
KR19990047017A KR1019970065217A KR19970065217A KR19990047017A KR 19990047017 A KR19990047017 A KR 19990047017A KR 1019970065217 A KR1019970065217 A KR 1019970065217A KR 19970065217 A KR19970065217 A KR 19970065217A KR 19990047017 A KR19990047017 A KR 19990047017A
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mixed
leaves
salt
far
powder
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KR100242824B1 (en
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이영환
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/6261—Milling
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63416—Polyvinylalcohols [PVA]; Polyvinylacetates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0097—Anion- and far-infrared-emitting materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

통상의 원적외선 방사세라믹인 비석, 운모석, 납석, 활석, 황토를 각각 분쇄가 용이한 강도로 일정온도에서 소성, 분말화하여 혼합 세라믹 분말을 넣고, 다시 은행잎, 오동잎, 떡갈나무잎 및 소나무잎, 무우잎 등을 추출하여 그 추출액으로는 소금분말을 용해한 나무잎 소금용액을 얻고 선인장과 해초를 압착하여 액즙을 얻고 그 액즙을 수용성 접착제와 혼합한 것에 상기 혼합세라믹 분말, 나무잎, 추출고형물, 나무잎 추출소금물을 첨가하므로서 천정지나 벽지 및 장판지(비닐장판)내에 도포하면 원적외선 방사 세라믹에 의해서는 원적외선을 방사하여 인체에 유익하고 그외의 물질인 전자파 흡수제어에 의하여도 전자파를 사방에서 흡수하게 되므로 인체에 유해한 전자파는 흡수하고 무해하면서 유익한 원적외선은 방출하여 인체에 유익한 효과를 주게 되는 것이다.Ordinary far-infrared radiation ceramics, such as zeolite, mica, feldspar, talc and ocher, are calcined and powdered at a constant temperature at an easy-to-crush strength, and then mixed with ceramic powder, and then ginkgo leaves, paulownia leaves, oak leaves and pine leaves. Extract the radish leaves, etc. The extract is obtained from the tree leaf salt solution in which salt powder is dissolved, the cactus and seaweed are compressed to obtain a juice, and the juice is mixed with a water-soluble adhesive, the mixed ceramic powder, tree leaves, extract solids, When applied to ceiling paper, wall paper, and paperboard (vinyl sheet) by adding tree leaf extract salt, far-infrared radiation ceramics radiate far-infrared rays, which is beneficial to human body and absorbs electromagnetic waves everywhere by controlling electromagnetic wave absorption. Absorbs electromagnetic waves harmful to the human body and emits harmless and beneficial far infrared rays, which have a beneficial effect on the human body. It will be.

Description

전자파 흡수 및 원적외선 방사제 제조방법Electromagnetic Wave Absorption and Far Infrared Radiant Manufacturing Method

본 발명은 전자파 흡수 및 원적외선 방사제의 제조방법에 관한 것으로서, 종래에는 전자파 흡수를 위하여는 금속제품이나 각종 세라믹 제품들을 전자 제품의 전자파 발생부위 또는 그 근처에 부착하여 전자파 흡수를 시도한바 있으나 그 효과가 완벽하지 못하였으며 또한 전자제품의 임의의 위치에 마음데로 붙일수가 없었으며 특히 방의 바닥이나 벽등에는 전혀 사용이 불가능한 결점이 있었다.The present invention relates to a method for absorbing electromagnetic waves and a far-infrared radiating agent. In the past, in order to absorb electromagnetic waves, metal or various ceramic products were attached to or near the electromagnetic wave generating region of the electronic product, but the effect thereof was tried. Was not perfect and could not be attached to any position of the electronics, especially the floor or wall of the room was not able to use at all.

또한 원적외선 방사제로는 주로 각종 세라믹 분말을 사용하여 각종기구에 사용한 예는 있으나 이것 역시 전자파 흡수제와 동시에 혼합하여 사용한 제재는 없고 그 또한 장판지나 벽지에 액체로서 도포하기 위한 제재는 없었다.In addition, there are examples of the far-infrared radiating agent mainly used in various apparatuses using various ceramic powders, but there is no material used for mixing with the electromagnetic wave absorber at the same time.

본 발명은 상기와 같은 종래의 전자파 흡수물체의 결점을 개량하여 장판지나(비닐장판) 벽지에 도포사용할 수 있게 하되 거기에 원적외선 방사물질의 병합으로 장판지나 벽지에 도포하여 전자파 흡수 및 원적외선 방출작용을 동시에 할 수 있는 제재를 제공코져 하는 것으로서 이를 실예를 들어 상세히 설명하면 다음과 같다.The present invention is to improve the drawbacks of the conventional electromagnetic wave absorbing material as described above to be used for coating on a sheet of paper (vinyl sheet) or wallpaper, but the application of the far infrared radiation to the sheet of paper or wallpaper by incorporating the far infrared radiation absorbing and absorbing far infrared rays Provided as a sanction that can be done at the same time as described in detail as an example as follows.

본 발명은 통상의 원적외선 방사 세라믹인 비석과 운모석, 납석과 활석, 황토흙 및 자연산 왕소금 입자들을 각각 분쇄가 용이한 강도를 갖도록 각각 소정의 소성온도로 일정시간 소성후 비석, 운모석, 납석, 활석은 냉수로 급냉하여 건조한 다음 약 325메쉬 크기의 입자로 분말화 하되, 상기 비석과 운모석은 5㎜∼10㎜크기로 하여 600∼800℃까지 소성하고, 납석과 활석은 5㎜∼10㎜크기로 하여 450∼650℃까지 소성하며 황토흙은 350∼450℃까지 소성한 다음 상기 각각의 세라믹 분말을 비율에 무관하게 임의의 비율로 혼합하여 혼합 세라믹 분말을 얻고, 이때 비석, 운모석, 황토, 납석, 활석 분말에서 철분을 제거하며,The present invention is a stone, mica, feldspar, calcite, mica, feldspar and talc, loess soil and natural royal salt particles, which are ordinary far-infrared radiation ceramics. Talc is quenched with cold water and dried, and then powdered into particles of about 325 mesh size. The zeolite and mica are calcined to 600-800 ° C. in sizes of 5 mm to 10 mm, and the talc and talc are 5 mm to 10 mm in size. It is fired up to 450 ~ 650 ℃ and ocher soil is fired up to 350 ~ 450 ℃ and then mixed each ceramic powder in any ratio regardless of the ratio to obtain a mixed ceramic powder, wherein the zeolite, mica stone, loess, Remove iron from feldspar, talc powder,

상기 자연산 왕소금은 자연상태 그대로나 대나무에 밀봉하여 600∼800℃까지 소성하여 상기한 입자 크기의 소성 소금분말을 얻고,The natural royal salt is sealed in a natural state or bamboo and calcined to 600-800 ° C. to obtain calcined salt powder having the above particle size.

별도의 은행나무잎, 오동나무잎, 떨갈나무잎, 소나무잎, 무우잎등을 단독으로나 선택적으로 임의의 비율로 혼합하여 약 80℃의 온도에서 일정시간 물로 추출한후 거기에서 얻어진 각종 나무잎 추출잎으로는 상기한 자연산 왕소금의 소성 소금분말을 다른 물질과 혼합이 용이할 정도의 일정농도로 용해하여 나무잎 추출 소금용액을 얻고,Separate ginkgo biloba leaves, paulownia leaves, oak leaves, pine leaves, radish leaves, etc., alone or optionally, are mixed in arbitrary proportions, extracted with water at a temperature of about 80 ° C for various periods, and the various leaves of the leaves By dissolving the above-mentioned calcined salt powder of natural royal salt to a certain concentration that can be easily mixed with other substances to obtain a tree leaf extract salt solution,

상기 추출액을 제거한 고형물은 상온 건조하여 상기 세라믹 분말의 입자와 잘 혼합될 수 있는 입자 크기인 약 150메쉬크기의 입자로 분말화하여 나무잎 분말을 얻고,The solids from which the extract was removed are dried at room temperature to be powdered to particles of about 150 mesh size, which is a particle size that can be mixed well with the particles of the ceramic powder, thereby obtaining tree leaf powder.

다시 선인장과 미역이나 다시마등의 해초를 압착하여 혼합액즙을 얻은 다음, 먼저 상기에서 얻은 나무잎 추출 소금용액에 상기 선인장, 해초 혼합액즙에 피 브이 에이(PVA)와 같은 수용성 접착제를 45∼65℃의 온도로 가열하면서 혼합한 액을 첨가한 다음 상기에서 얻은 나무잎 분말과 상기 혼합 세라믹 분말을 차례로 첨가한 후 혼련 교반하여 본 발명 목적물을 얻는 것이다.After pressing the seaweeds such as cactus and seaweed or kelp again to obtain a mixed juice, first, a water-soluble adhesive such as PVA is applied to the cactus and seaweed mixed solution to the tree leaf extract salt solution obtained above. The mixture was added while heating to a temperature of and then the tree leaf powder obtained above and the mixed ceramic powder were added sequentially, followed by kneading and stirring to obtain the object of the present invention.

이상에서와 같이 구성된 본 발명의 전자파 흡수 및 원적외선 방사제에 있어서 사용물질중 공지된 원적외선 방사 세라믹들의 분말 입자의 크기를 약 325메쉬로 하는 것은 나중에 혼합할 나무 추출 소금용액과 나무잎 분말 및 선인장, 해초 혼합액즙을 수용성 접착제와 혼합한 것과 혼련 교반이 용이하게 하기 위함이며 그 이상의 입자크기로는 상기 다른 물질들과 균일한 혼련 교반이 되지 않기 때문이고, 각각의 원적외선 소성온도에 차이를 두는 것은 그 이하의 온도에서는 완전한 소성이 안되고 그 이상의 온도에서는 소결강도가 너무 높아서 분말로 하기가 어렵고 특히 황토흙의 경우 그 이상이 소성 온도에서는 완전히 옹기화 하여 분말이 불가능하거나 균일한 분말화가 안될 뿐만 아니라 원적외선 방출이 감소되는 결과를 얻게 된다.In the electromagnetic wave absorption and far-infrared radiator of the present invention configured as described above, the size of powder particles of known far-infrared radiation ceramics among the materials used is about 325 mesh, and the tree extract salt solution and tree leaf powder and cactus to be mixed later. This is because the mixture of seaweed juice is mixed with the water-soluble adhesive to facilitate the mixing and stirring, and the particle size larger than the above does not allow the uniform mixing and stirring with the other materials, and the difference between the far-infrared firing temperatures is different. At the temperature below, it is not completely calcined and at higher temperatures, the sintering strength is too high to make powder. Especially in the case of loess soil, the above is completely turned into an attrition temperature, which makes powder impossible or uniform powdering and emits far infrared rays. This results in a reduction.

또한 자연산 왕소금을 사용하는 것은 소금자체에 의한 원적외선 방출량을 증가시키면서 본 발명 제재의 부폐를 방지하기 위한 것으로 사용된 것이다.In addition, the use of natural royal salt is used to prevent the spoilage of the present invention while increasing the amount of far-infrared emission by the salt itself.

상기에서 각종 나무잎과 선인장 및 해초는 전자파 흡수작용을 하기 위한 것으로서 각종 나무잎을 사용하여 그 추출액을 얻고 그 추출액으로 소금분말을 용해한 용해액을 얻는 것은 소금을 전자파 방지효과가 있는 각종나무를 본 발명 제재에 혼합하되 그 추출물로는 소금분말을 녹여서 혼합을 도우면서 전자파 흡수효과를 주기 위한 것이면서 그 추출후의 분말은 세라믹 분말과 혼합이 잘 되게 하기 위한 것이고 선인장과 해초 역시 전자파 흡수작용을 하는 물질로서 이들 물질은 원래 약간 접착성이 있는 물질들로서 여기에 수용성 접착제를 첨가하므로서 본 발명 제재를 벽지나 바닥장판등의 내면에 도포시에 강한 접착력을 부여하기 위한 것이다.Various tree leaves, cacti and seaweeds are for the purpose of absorbing electromagnetic waves. To obtain the extract using various tree leaves and to obtain the dissolved solution in which salt powder is dissolved, the various kinds of trees having the effect of preventing electromagnetic waves are seen. It is mixed with the invention material, but the extract is for dissolving the salt powder to help the mixing while giving the effect of absorbing electromagnetic waves, and the powder after the extraction is to be well mixed with the ceramic powder, and the cactus and seaweed are substances that also absorb the electromagnetic waves. As these materials are originally slightly adhesive materials, water-soluble adhesives are added thereto to impart a strong adhesive force upon application of the present invention to the inner surface of the wallpaper or floorboard.

본 발명의 제품은 벽지, 천정지 및 장판지의 내면이나 이면에 적절한 방법으로 도포하여 벽지나 천정지 및 장판지로 사용하므로서 실내의 각종 전자제품에서 발생되는 전자파를 사방에서 흡수할 수 있을 뿐 아니라 원적외선이 방출되어 인체 건강에 유익효과를 주게 되므로 일거양득의 효과가 있다고 하겠다.The product of the present invention can be applied to the inner surface or the back surface of wallpaper, ceiling paper and sheet paper by appropriate methods to be used as wallpaper or ceiling sheet and sheet paper to absorb the electromagnetic waves generated from various electronic products in the room from all directions as well as far infrared rays. Since it is released to give a beneficial effect on human health, it will be said to have the effect of one-off.

본 발명은 벽지나 장판지(또는 비닐장판)내면에 도포하여 인체에 유해한 전자파 흡수는 물론 인체에 유익한 원적외선을 방사토록 하는 전자파 흡수겸 원적외선 방사제를 제공코저 하는 것이다.The present invention is to provide an electromagnetic wave absorbing and far-infrared radiating agent that is applied to the inner surface of the wallpaper or sheetboard (or vinyl sheet) to not only absorb electromagnetic waves harmful to the human body but also emit far infrared rays beneficial to the human body.

Claims (2)

통상의 원적외선 방사 세라믹인 비석과 운모석, 납석과 활석, 황토흙 및 자연산 왕소금 입자들을 각각 분쇄가 용이한 강도를 갖도록 각각 소정의 소성온도로 일정시간 소성후 비석, 운모석, 납석, 활석은 냉수로 급냉하여 건조한 다음 약 325메쉬 크기의 입자로 분말화 하여, 상기 각각의 세라믹 분말을 비율에 무관하게 임의의 비율로 혼합하여 혼합 세라믹 분말을 얻고, 이때 황토, 비석, 운모석, 납석, 활석에서 발생한 철분을 제거하며,Zeolite, mica, feldspar and talc are cold water after certain time firing at a certain firing temperature to have the strength that is easy to crush the zeolite, mica, feldspar and talc, ocher soil and natural royal salt particles, which are common far-infrared radiation ceramics. After quenching, drying and pulverizing into particles of about 325 mesh size, each ceramic powder was mixed in any ratio regardless of the ratio to obtain a mixed ceramic powder, wherein in ocher, zeolite, mica, feldspar, talc, Removes the iron produced, 상기 자연산 왕소금은 자연상태 그대로나 대나무에 밀봉하여 600∼800℃까지 소성하여 상기한 입자 크기의 소성 소금분말을 얻고,The natural royal salt is sealed in a natural state or bamboo and calcined to 600-800 ° C. to obtain calcined salt powder having the above particle size. 별도의 은행나무잎, 오동나무잎, 떨갈나무잎, 소나무잎, 무우잎등을 단독으로나 선택적으로 임의의 비율로 혼합하여 약 80℃의 온도에서 일정시간 물로 추출한후 거기에서 얻어진 각종 나무잎 추출액으로는 상기한 자연산 왕소금의 소성 소금분말을 다른 물질과 혼합이 용이할 정도의 일정농도로 용해하여 나무잎 추출 소금용액을 얻고,Separate ginkgo biloba leaves, paulownia leaves, oak leaves, pine leaves, radish leaves, etc., alone or optionally, are mixed in arbitrary proportions, extracted with water at a temperature of about 80 ℃, and then extracted with various tree leaf extracts obtained therefrom. Dissolve the calcined salt powder of the above-mentioned natural royal salt to a certain concentration so that it can be easily mixed with other substances to obtain a tree leaf extract salt solution, 상기 추출액을 제거한 고형물은 상온 건조하여 상기 세라믹 분말의 입자와 잘 혼합될 수 있는 입자 크기인 약 150메쉬크기의 입자로 분말화하여 나무잎 분말을 얻고,The solids from which the extract was removed are dried at room temperature to be powdered to particles of about 150 mesh size, which is a particle size that can be mixed well with the particles of the ceramic powder, thereby obtaining tree leaf powder. 다시 선인장과 미역이나 다시마등의 해초를 압착하여 혼합액즙을 얻은 다음, 먼저 상기에서 얻은 나무잎 추출 소금용액에 상기 선인장, 해초 혼합액즙에 피 브이 에이(PVA)와 같은 수용성 접착제를 45∼65℃의 온도로 가열하면서 혼합한 액을 첨가한 다음 상기에서 얻은 나무잎 분말과 상기 혼합 세라믹 분말을 차례로 첨가한 후 혼련 교반한 것으로 구성됨을 특징으로 하는 전자파 흡수 및 원적외선 방사제의 제조방법.After pressing the seaweeds such as cactus and seaweed or kelp again to obtain a mixed juice, first, a water-soluble adhesive such as PVA is applied to the cactus and seaweed mixed solution to the tree leaf extract salt solution obtained above. Method of producing an electromagnetic wave absorber and far-infrared radiator, characterized in that the mixture is added while heating to the temperature of the mixture and then kneaded and stirred after the tree leaf powder obtained above and the mixed ceramic powder. 제1항에서 제조된 혼합교반된 액체를 천정지, 벽지, 장판지(또는 비닐장판지) 내면 또는 이면에 도포하여 전자파 흡수 및 원적외선 방사제의 제조방법.A method of manufacturing an electromagnetic wave absorber and far-infrared radiator by applying the mixed and stirred liquid prepared in claim 1 to an inner surface or a back surface of a ceiling paper, a wallpaper, a sheet of paper (or a sheet of vinyl).
KR1019970065217A 1997-12-02 1997-12-02 Method of manufacturing electromagnetic waves absorbent radiating ultrared ray KR100242824B1 (en)

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KR20020076059A (en) * 2001-03-27 2002-10-09 정재일 manufacture method of wallpaper which contains mineral matter
KR20020080054A (en) * 2001-04-10 2002-10-23 주식회사 월핀 Wallpaper of synthetic resins and biodegradable natural materials
KR100378132B1 (en) * 1999-12-03 2003-03-29 오춘금 Process For Preparing Of Far Infrared ray Chip
KR20040049369A (en) * 2002-12-03 2004-06-12 이영환 eye bandage skillea
KR100591003B1 (en) * 2003-12-01 2006-06-19 이종영 The manufacturing Process of non-woven fabric, woven fabric and paper with preventation of electric charge amd anti-fungi
KR101005291B1 (en) * 2008-01-14 2011-01-04 이춘구 A antifungal sheet and the making method blocking harmful bacterium
KR101529857B1 (en) * 2015-03-23 2015-06-17 대복건설 주식회사 Salt mortar composition for building materials

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KR100361365B1 (en) * 1999-08-25 2002-11-22 곽명숙 A structure with the salt

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KR970059144A (en) * 1996-01-19 1997-08-12 김효충 Manufacturing method of far-infrared ray powder material
KR100237363B1 (en) * 1997-07-08 2000-01-15 양병선 Plaster for architecture and that manufacturing process with the main material of yellow soil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100378132B1 (en) * 1999-12-03 2003-03-29 오춘금 Process For Preparing Of Far Infrared ray Chip
KR20020076059A (en) * 2001-03-27 2002-10-09 정재일 manufacture method of wallpaper which contains mineral matter
KR20020080054A (en) * 2001-04-10 2002-10-23 주식회사 월핀 Wallpaper of synthetic resins and biodegradable natural materials
KR20040049369A (en) * 2002-12-03 2004-06-12 이영환 eye bandage skillea
KR100591003B1 (en) * 2003-12-01 2006-06-19 이종영 The manufacturing Process of non-woven fabric, woven fabric and paper with preventation of electric charge amd anti-fungi
KR101005291B1 (en) * 2008-01-14 2011-01-04 이춘구 A antifungal sheet and the making method blocking harmful bacterium
KR101529857B1 (en) * 2015-03-23 2015-06-17 대복건설 주식회사 Salt mortar composition for building materials

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