KR20180091846A - insulator - Google Patents

insulator Download PDF

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Publication number
KR20180091846A
KR20180091846A KR1020187017243A KR20187017243A KR20180091846A KR 20180091846 A KR20180091846 A KR 20180091846A KR 1020187017243 A KR1020187017243 A KR 1020187017243A KR 20187017243 A KR20187017243 A KR 20187017243A KR 20180091846 A KR20180091846 A KR 20180091846A
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South Korea
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layer
heat insulating
foam
insulating material
thickness
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KR1020187017243A
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Korean (ko)
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KR102082918B1 (en
Inventor
최경석
임지연
이승언
박철범
트란민펑
공팽지안
버아호므피야퐁
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한국건설기술연구원
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • 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
    • E04C2/284—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 at least one of the materials being insulating
    • 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
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
    • B32B2264/108—Carbon, e.g. graphite particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0242—Acrylic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)

Abstract

본 발명의 실시예에 따른 단열재는, 나노 셀 폼을 포함하는 제1 층; 상기 제1 층 위에 위치하며, 상기 나노 셀 폼보다 큰 포어를 가지는 마이크로 셀 폼을 포함하는 제2 층; 및 상기 제2 층 위에 위치하며, 팽창 흑연을 포함하는 제3 층을 포함한다.A heat insulating material according to an embodiment of the present invention includes: a first layer including a nanocell foam; A second layer overlying the first layer and including a microcell foam having a pore larger than the nanocell foam; And a third layer overlying the second layer, the third layer comprising expanded graphite.

Description

단열재insulator

본 발명은 단열재에 관한 것으로서, 좀더 상세하게는, 적층 구조를 개선한 단열재에 관한 것이다. The present invention relates to a heat insulating material, and more particularly, to a heat insulating material improved in a laminated structure.

건축물 등의 단열 성능을 높이기 위하여 사용되는 다양한 단열재를 사용하고 있다. 이러한 단열재로 가장 널리 사용되는 것이 수지를 발포하여 형성된 발포체로 구성된 단열재이다. And various insulation materials used for improving the heat insulation performance of buildings and the like are used. The most widely used type of the heat insulating material is a heat insulating material composed of a foam formed by foaming a resin.

그러나 이와 같이 수지를 발포하여 발포체로 구성된 단열재는 그 자체만으로 구현할 수 있는 단열 성능에 한계가 있어 충분한 단열 성능을 확보하기 어렵다. 따라서 충분한 단열 성능을 구현할 수 있는 단열재가 요구되고 있다. However, it is difficult to obtain a sufficient heat insulating performance because the heat insulating performance formed by foaming the resin in such a manner is limited by the heat insulating performance that can be realized by itself. Therefore, a heat insulating material capable of realizing sufficient heat insulating performance is required.

본 발명은 우수한 단열 성능을 가지는 단열재를 제공하고자 한다. The present invention seeks to provide a heat insulating material having excellent heat insulating performance.

본 발명의 실시예에 따른 단열재는, 나노 셀 폼을 포함하는 제1 층; 상기 제1 층 위에 위치하며, 상기 나노 셀 폼보다 큰 포어를 가지는 마이크로 셀 폼을 포함하는 제2 층; 및 상기 제2 층 위에 위치하며, 팽창 흑연을 포함하는 제3 층을 포함한다.A heat insulating material according to an embodiment of the present invention includes: a first layer including a nanocell foam; A second layer overlying the first layer and including a microcell foam having a pore larger than the nanocell foam; And a third layer overlying the second layer, the third layer comprising expanded graphite.

상기 제2 층의 상기 포어의 평균 크기가 5um 내지 30um로 형성될 수 있다. The average size of the pores of the second layer may be formed to be between 5 [mu] m and 30 [mu] m.

상기 제2 층의 밀도가 상기 제1 층의 밀도보다 작게 형성될 수 있다.The density of the second layer may be less than the density of the first layer.

상기 제1 층의 밀도에 대한 상기 제2 층의 밀도의 비율이 0.2 내지 0.4로 형성될 수 있다.The ratio of the density of the second layer to the density of the first layer may be 0.2 to 0.4.

상기 제2 층이 상기 제1 층의 양면에 각기 위치하고, 상기 제3 층이 상기 제1 층의 양면에 각기 위치하는 상기 제2 층 위에 각기 위치하여 상기 단열재의 양쪽 외면을 구성할 수 있다.The second layer may be positioned on both sides of the first layer and the third layer may be positioned on the second layer located on both sides of the first layer to constitute both outer surfaces of the heat insulating material.

상기 제1 층은 폴리스티렌과 폴리메틸메타크릴레이트를 포함하는 폼으로 이루어지고, 상기 제2 층은 폴리스티렌 폼으로 이루어지고, 상기 제3 층은 상기 팽창 흑연과 폴리스티렌 수지를 포함할 수 있다.The first layer may be made of a foam containing polystyrene and polymethylmethacrylate, the second layer may be made of polystyrene foam, and the third layer may include the expanded graphite and polystyrene resin.

상기 제1 층의 두께가 상기 제3 층의 두께보다 크고, 상기 제2 층의 두께가 상기 제1 층 및 상기 제3 층의 두께 각각보다 크게 형성될 수 있다.The thickness of the first layer may be greater than the thickness of the third layer and the thickness of the second layer may be greater than the thickness of the first layer and the third layer.

상기 단열재가 판상 단열재로 형성될 수 있다.The heat insulating material may be formed of a plate-shaped heat insulating material.

본 실시예에 따른 단열재에서는 제1 층, 제2 층 및 제3 층의 적층 구조에 의하여 복사, 고체상 및 기체상에 따른 열전도도를 각기 낮추어 열전도도를 효과적으로 낮출 수 있다. 그리고 외면에 복사에 의한 열전도를 저감하는 제3 층을 위치시켜 단열재의 내부로 복사에 의한 열이 전도되지 않도록 하고, 제3 층의 내부에 위치한 제2 층에 의하여 고체상을 통한 열 전도를 저감하고 가장 내부에 치한 제1 층에서 기체상을 통한 열 전도를 저감한다. 이와 같은 적층 순서에 의하여 열전도도를 효과적으로 저감할 수 있다.In the heat insulating material according to this embodiment, the thermal conductivity can be effectively lowered by lowering the thermal conductivity depending on radiation, solid phase, and gas phase by the laminated structure of the first layer, the second layer and the third layer. And a third layer for reducing heat conduction due to radiation on the outer surface is positioned so that heat due to radiation is not conducted to the inside of the heat insulating material and heat conduction through the solid phase is reduced by the second layer located inside the third layer Reduces heat conduction through the gas phase in the innermost layer. The thermal conductivity can be effectively reduced by such a stacking sequence.

도 1은 본 발명이 실시예에 따른 단열재를 도시한 개략적인 단면도이다.1 is a schematic cross-sectional view showing a heat insulating material according to an embodiment of the present invention.

이하에서는 첨부한 도면을 참조하여 본 발명의 실시예를 상세하게 설명한다. 그러나 본 발명이 이러한 실시예에 한정되는 것은 아니며 다양한 형태로 변형될 수 있음은 물론이다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it is needless to say that the present invention is not limited to these embodiments and can be modified into various forms.

도면에서는 본 발명을 명확하고 간략하게 설명하기 위하여 설명과 관계 없는 부분의 도시를 생략하였으며, 명세서 전체를 통하여 동일 또는 극히 유사한 부분에 대해서는 동일한 도면 참조부호를 사용한다. 그리고 도면에서는 설명을 좀더 명확하게 하기 위하여 두께, 넓이 등을 확대 또는 축소하여 도시하였는바, 본 발명의 두께, 넓이 등은 도면에 도시된 바에 한정되지 않는다.In the drawings, the same reference numerals are used for the same or similar parts throughout the specification. In the drawings, the thickness, the width, and the like are enlarged or reduced in order to make the description more clear, and the thickness, width, etc. of the present invention are not limited to those shown in the drawings.

그리고 명세서 전체에서 어떠한 부분이 다른 부분을 "포함"한다고 할 때, 특별히 반대되는 기재가 없는 한 다른 부분을 배제하는 것이 아니며 다른 부분을 더 포함할 수 있다. 또한, 층, 막, 영역, 판 등의 부분이 다른 부분 "위에" 있다고 할 때, 이는 다른 부분 "바로 위에" 있는 경우뿐 아니라 그 중간에 다른 부분이 위치하는 경우도 포함한다. 층, 막, 영역, 판 등의 부분이 다른 부분 "바로 위에" 있다고 할 때에는 중간에 다른 부분이 위치하지 않는 것을 의미한다.Wherever certain parts of the specification are referred to as "comprising ", the description does not exclude other parts and may include other parts, unless specifically stated otherwise. Also, when a portion of a layer, film, region, plate, or the like is referred to as being "on" another portion, it also includes the case where another portion is located in the middle as well as the other portion. When a portion of a layer, film, region, plate, or the like is referred to as being "directly on" another portion, it means that no other portion is located in the middle.

이하, 도면을 참조하여 본 발명의 실시예에 따른 단열재를 상세하게 설명한다. Hereinafter, a heat insulating material according to an embodiment of the present invention will be described in detail with reference to the drawings.

도 1은 본 발명이 실시예에 따른 단열재를 도시한 개략적인 단면도이다. 1 is a schematic cross-sectional view showing a heat insulating material according to an embodiment of the present invention.

도 1을 참조하면, 본 실시예에 따른 단열재(100)는, 나노 크기의 제1 기공(10a)을 가지는 나노 셀 폼을 포함하는 제1 층(10)과, 제1 층(10) 위에 위치하며 제1 기공(10a)보다 큰 제2 기공(20a)를 가지는 마이크로 셀 폼을 포함하는 제2 층(20)과, 제2 층(20) 위에 위치하며 팽창 흑연(32)을 포함하는 제3 층(30)을 포함한다. 이때, 제2 층(20)이 제1 층(10)의 양쪽에 각기 위치하고, 제3 층(30)이 제1 층(10)의 양쪽에 각기 위치하는 제2 층(20) 위에서 각기 위치할 수 있다. 이에 의하여 제1 층(10)이 중심층을 구성하고, 제3 층(30)이 단열재(100)의 양쪽 외면을 구성하고, 제2 층(20)이 제1 층(10)과 양쪽 외면의 제3 층(30) 사이에 각기 위치할 수 있다. 1, a heat insulating material 100 according to an embodiment of the present invention includes a first layer 10 including a nanocell foam having a first pore 10a having a nano size, A second layer 20 including a microporous foam having a second pore 20a larger than the first pore 10a and a second layer 20 disposed above the second layer 20 and including expanded graphite 32, Layer 30 as shown in FIG. At this time the second layer 20 is positioned on each side of the first layer 10 and the third layer 30 is positioned on the second layer 20 located on each side of the first layer 10 . Whereby the first layer 10 constitutes a central layer and the third layer 30 constitutes both outer surfaces of the heat insulating material 100 and the second layer 20 constitutes the outer surface of the first layer 10 and both outer surfaces And third layer 30, respectively.

단열재(100)의 외면을 구성하는 제3 층(30)은 팽창 흑연(32)을 포함하여 열 복사를 차단하는 역할을 할 수 있다. 팽창 흑연(32)은 판형 기하 구조를 가지고 입사각 또는 진동수와 관계 없이 모든 전자기 복사를 흡수할 수 있다. 그리고 구불거리고 거친 팽창 흑연(32)의 표면은 다중 반사를 야기할 수 있다. 이에 의하여 팽창 흑연(32)은 열복사를 효과적으로 차단할 수 있다.즉, 제3 층(30)에 의하여 복사를 통한 열전도율(λrad)을 낮출 수 있다. 팽창 흑연(32)은 직경이 5mm 이하(일 예로 직경 1mm 내지 5mm)이고, 길이가 20mm 내지 50mm일 수 있다. 팽창 흑연(32)은 제3 층(30) 전체 100 중량%에 대하여 0.01 중량% 내지 5 중량%만큼 포함될 수 있다. 이러한 직경, 길이, 및 중량%에서 복사를 통한 열전도율을 효과적으로 방지할 수 있다. 그러나 본 발명이 이에 한정되는 것은 아니며 팽창 흑연(32)의 직경, 길이 및 중량%가 다양한 값을 가질 수 있다. 좀더 구체적으로, 제3 층(30)은 수지(34) 내에 팽창 흑연(32)이 분산된 층일 수 있다. 수지(34)로는 단열 성능이 우수한 수지(32)를 포함할 수 있는데, 일 예로, 폴리스티렌 수지를 포함할 수 있다. 또는, 제3 층(30)의 수지(34)는 제1 층(10) 및 제2 층(20)에 적어도 일부로 포함된 수지(즉, 폴리스티렌 수지)와 동일한 수지가 포함될 수 있다. 이는 제3 층(30)이 제1 층(10) 및 제2 층(20)의 적어도 일부와 동일한 수지를 포함하여 동일한 특성을 가지도록 하여 이종 물질을 사용할 경우에 나타날 수 있는 문제 등을 방지할 수 있다. 일 예로, 제3 층(30)은 팽창 흑연(32)을 포함하는 폴리스티렌 폼으로 구성될 수 있다. The third layer 30 constituting the outer surface of the heat insulating material 100 may include expanded graphite 32 to prevent heat radiation. The expanded graphite 32 has a planar geometry and is capable of absorbing all electromagnetic radiation regardless of the incident angle or frequency. And the surface of the curled, rough expanded graphite 32 may cause multiple reflections. Thus, the expanded graphite 32 can effectively block heat radiation. That is, the third layer 30 can lower the thermal conductivity (? Rad ) through radiation. The expanded graphite 32 may have a diameter of 5 mm or less (for example, 1 mm to 5 mm in diameter) and a length of 20 mm to 50 mm. The expanded graphite 32 may be included in an amount of 0.01 wt% to 5 wt% based on 100 wt% of the entire third layer 30. It is possible to effectively prevent the thermal conductivity through radiation from such diameter, length, and weight percent. However, the present invention is not limited thereto, and the diameter, length, and weight percent of the expanded graphite 32 may have various values. More specifically, the third layer 30 may be a layer in which the expanded graphite 32 is dispersed in the resin 34. The resin (34) may include a resin (32) having an excellent heat insulating property, and may include, for example, a polystyrene resin. Alternatively, the resin 34 of the third layer 30 may include the same resin as the resin (i. E., Polystyrene resin) included in at least a part of the first layer 10 and the second layer 20. This is because the third layer 30 includes the same resin as at least a part of the first layer 10 and the second layer 20 so as to have the same characteristics to prevent a problem or the like . As an example, the third layer 30 may be comprised of a polystyrene foam comprising expanded graphite 32.

그리고 제1 층(10)과 제3 층(30) 사이에 위치하는 제2 층(20)은 마이크로 셀 폼을 포함하여 고체를 통한 열전도를 감소시킬 수 있다. 즉, 제2 층(20)에 의하여 고체상을 통한 열전도율(λsolid)을 낮출 수 있다. 이때, 제2 층(20)은 제1 층(10)보다 작은 밀도를 가져 고체를 통한 열전도를 효과적으로 감소시킬 수 있다. 일 예로, 제2 층(20)의 제2 기공(20a)의 평균 크기가 5um 내지 30um이고, 제1 층(10)의 밀도에 대한 제2 층(20)의 밀도의 비율(또는 제1 층(10)에 대한 제2 층(20)의 상대 밀도)가 0.2 내지 0.4일 수 있다. 이러한 범위 내에서 고체를 통한 열전도를 최대한으로 감소할 수 있다. And the second layer 20 positioned between the first layer 10 and the third layer 30 may include microcell foams to reduce heat conduction through the solid. That is, the second layer 20 can lower the thermal conductivity? Solid through the solid phase. At this time, the second layer 20 has a smaller density than the first layer 10, and can effectively reduce the heat conduction through the solid. In one example, the average size of the second pores 20a of the second layer 20 is between 5 um and 30 um and the ratio of the density of the second layer 20 to the density of the first layer 10 (Relative density of the second layer 20 to the first layer 10) may be 0.2 to 0.4. Within this range, heat conduction through the solid can be reduced to the maximum extent possible.

그리고 제1 층(10)은 제2 기공(20a)보다 작은 크기의 제1 기공(10a)을 가지는 나노 셀 폼을 포함하여 기체를 통한 열전도를 감소시킬 수 있다. 즉, 제1 층(10)에 의하여 기체상을 통한 열전도율(λgas)을 낮출 수 있다. 제1 층(10)이 작은 크기의 제1 기공(10a)을 가지는 다공성 구조를 가지므로, 기체가 제1 층(10)의 나노 셀의 벽에 충돌 할 때 에너지를 전달하는 크누센 효과를 나타낼 수 있다. 이에 의하여 제1 층(10)이 기체를 통한 열전도도를 감소시킬 수 있다. The first layer 10 may include a nanocell foam having a first pore 10a smaller in size than the second pore 20a to reduce heat conduction through the gas. That is, the thermal conductivity (lambda gas ) through the gas phase can be lowered by the first layer 10. Since the first layer 10 has a porous structure with a first pore 10a of small size, it exhibits a Knoevench effect that transfers energy when the gas collides against the walls of the nanocells of the first layer 10 . Whereby the first layer 10 can reduce the thermal conductivity through the gas.

이때, 제2 층(20)은 폴리스티렌 폼으로 구성될 수 있고, 제1 층(10)은 폴리스테린과 폴리메틸메타크릴레이트를 포함하는 폼으로 구성될 수 있다. 폴리스티렌을 포함하는 폼은 미세한 독립 포어 구조를 가져 우수한 단열 특성을 가지며 수분이나 습기에도 강하다. At this time, the second layer 20 may be composed of polystyrene foam, and the first layer 10 may be composed of a foam containing polystyrene and polymethyl methacrylate. Foams containing polystyrene have fine independent pore structures and have excellent thermal insulation properties and are resistant to moisture and moisture.

이와 같이 본 실시예에서는 제1 층(10)에 의하여 기체상을 통한 열전도율(λgas)을 낮추고 제2 층(20)에 의하여 고체상을 통한 열전도율(λsolid)을 낮추고 제3 층(30)에 의하여 복사를 통한 열전도율(λrad)을 낮출 수 있다. 열전도율은 기체상을 통한 열전도율(λgas), 고체상을 통한 열전도율(λsolid) 및 복사를 통한 열전도율(λrad)의 합인데, 본 실시예에서는 이러한 열전도율을 각기 낮추어 열전도도를 효과적으로 낮출 수 있다. 그리고 외면에 복사에 의한 열전도를 저감하는 제3 층(30)을 위치시켜 단열재(100)의 내부로 복사에 의한 열이 전도되지 않도록 하고, 제3 층(30)의 내부에 위치한 제2 층(20)에 의하여 고체상을 통한 열 전도를 저감하고 가장 내부에 위치한 제1 층(10)에서 기체상을 통한 열 전도를 저감한다. 이에 의하여 열 전도도를 효과적으로 낮출 수 있다. As described above, in this embodiment, the thermal conductivity (λ gas ) through the gas phase is lowered by the first layer 10, the thermal conductivity λ solid through the solid phase is lowered by the second layer 20, Thereby reducing the thermal conductivity ([lambda] rad ) through radiation. The thermal conductivity is the sum of the thermal conductivity (? Gas ) through the gas phase, the thermal conductivity through the solid phase (? Solid ) and the thermal conductivity through radiation (? Rad ). In this embodiment, the thermal conductivity can be lowered effectively to lower the thermal conductivity. A third layer 30 for reducing heat conduction due to radiation on the outer surface is positioned so that heat due to radiation is prevented from being conducted to the inside of the heat insulating material 100 and the second layer 20 reduces heat conduction through the solid phase and reduces heat conduction through the gas phase in the innermost first layer 10. [ Thus, the thermal conductivity can be effectively lowered.

이때, 제1 층(10)의 두께(T1)가 제3 층(30)의 두께(T3)보다 크고, 제2 층(20)의 두께(T2)가 제1 층(10)의 두께(T1) 및 제3 층(30)의 두께(T3) 각각보다 클 수 있다. The thickness T1 of the first layer 10 is greater than the thickness T3 of the third layer 30 and the thickness T2 of the second layer 20 is greater than the thickness T1 of the first layer 10 And the thickness T3 of the third layer 30, respectively.

상술한 단열재(100)는 제1 층(10), 제2 층(20) 및 제3 층(30)이 적층된 방향을 두께로 하는 판상 단열재 또는 단열 패널 등으로 사용될 수 있다. The above-mentioned heat insulating material 100 can be used as a plate-like heat insulating material or a heat insulating panel in which the first layer 10, the second layer 20 and the third layer 30 are stacked in the thickness direction.

도면에서는 제1 층(10)과 제2 층(20)이 서로 접촉하고 제2 층(20)과 제3 층(30)이 서로 접촉하여 형성되어 단순한 구조에 의하여 열 전도도를 최소화할 수 있는 것을 예시하였다. 그러나 본 발명이 이에 한정되는 것은 아니며 제1 층(10)과 제2 층(20) 사이에 다른 층이 위치하거나 제2 층(20)과 제3 층(30) 사이에 다른 층이 위치하는 등의 다양한 변형이 가능하다. The first layer 10 and the second layer 20 are in contact with each other and the second layer 20 and the third layer 30 are in contact with each other so that the thermal conductivity can be minimized by a simple structure . However, the present invention is not limited to this, and other layers may be located between the first layer 10 and the second layer 20, or another layer may be located between the second layer 20 and the third layer 30 Can be variously modified.

상술한 바에 따른 특징, 구조, 효과 등은 본 발명의 적어도 하나의 실시예에 포함되며, 반드시 하나의 실시예에만 한정되는 것은 아니다. 나아가, 각 실시예에서 예시된 특징, 구조, 효과 등은 실시예들이 속하는 분야의 통상의 지식을 가지는 자에 의하여 다른 실시예들에 대해서도 조합 또는 변형되어 실시 가능하다. 따라서 이러한 조합과 변형에 관계된 내용들은 본 발명의 범위에 포함되는 것으로 해석되어야 할 것이다.Features, structures, effects and the like according to the above-described embodiments are included in at least one embodiment of the present invention, and the present invention is not limited to only one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

Claims (8)

나노 셀 폼을 포함하는 제1 층;
상기 제1 층 위에 위치하며, 상기 나노 셀 폼보다 큰 포어를 가지는 마이크로 셀 폼을 포함하는 제2 층; 및
상기 제2 층 위에 위치하며, 팽창 흑연을 포함하는 제3 층
을 포함하는 단열재. A first layer comprising a nanocell foam;
A second layer overlying the first layer and including a microcell foam having a pore larger than the nanocell foam; And
A third layer positioned over the second layer, the third layer comprising expanded graphite,
/ RTI > 제1항에 있어서,
상기 제2 층의 상기 포어의 평균 크기가 5um 내지 30um인 단열재. The method according to claim 1,
And the average size of the pores of the second layer is 5 um to 30 um. 제1항에 있어서,
상기 제2 층의 밀도가 상기 제1 층의 밀도보다 작은 단열재. The method according to claim 1,
Wherein the density of the second layer is less than the density of the first layer. 제1항에 있어서,
상기 제1 층의 밀도에 대한 상기 제2 층의 밀도의 비율이 0.2 내지 0.4인 단열재. The method according to claim 1,
Wherein the ratio of the density of the second layer to the density of the first layer is 0.2 to 0.4. 제1항에 있어서,
상기 제2 층이 상기 제1 층의 양면에 각기 위치하고,
상기 제3 층이 상기 제1 층의 양면에 각기 위치하는 상기 제2 층 위에 각기 위치하여 상기 단열재의 양쪽 외면을 구성하는 단열재. The method according to claim 1,
Wherein the second layer is located on each side of the first layer,
Wherein the third layer is located on each of the second layers located on both sides of the first layer, and constitutes both outer surfaces of the heat insulating material. 제1항에 있어서,
상기 제1 층은 폴리스티렌과 폴리메틸메타크릴레이트를 포함하는 폼으로 이루어지고,
상기 제2 층은 폴리스티렌 폼으로 이루어지고,
상기 제3 층은 상기 팽창 흑연과 폴리스티렌 수지를 포함하는 단열재. The method according to claim 1,
Wherein the first layer comprises a foam comprising polystyrene and polymethylmethacrylate,
Wherein the second layer is made of polystyrene foam,
And the third layer comprises the expanded graphite and a polystyrene resin. 제1항에 있어서,
상기 제1 층의 두께가 상기 제3 층의 두께보다 크고,
상기 제2 층의 두께가 상기 제1 층 및 상기 제3 층의 두께 각각보다 큰 단열재. The method according to claim 1,
Wherein the thickness of the first layer is greater than the thickness of the third layer,
Wherein the thickness of the second layer is greater than the thickness of the first layer and the third layer, respectively. 제1항에 있어서,
상기 단열재가 판상 단열재인 단열재.The method according to claim 1,
Wherein the heat insulating material is a plate heat insulating material.
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