CN108779639B - Heat insulating material - Google Patents

Heat insulating material Download PDF

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Publication number
CN108779639B
CN108779639B CN201580085822.7A CN201580085822A CN108779639B CN 108779639 B CN108779639 B CN 108779639B CN 201580085822 A CN201580085822 A CN 201580085822A CN 108779639 B CN108779639 B CN 108779639B
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China
Prior art keywords
layer
foam
heat insulating
thermal insulation
expanded graphite
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Active
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CN201580085822.7A
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Chinese (zh)
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CN108779639A (en
Inventor
崔景硕
林知娟
李承彦
朴哲范
陈明方
孔平建
皮耶蓬·布罕
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Korea Institute of Construction Technology
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Korea Institute of Construction Technology
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    • 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
    • B32B7/027—Thermal properties
    • 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
    • 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
    • B32B2266/0242—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

Abstract

The heat insulating material of the embodiment of the invention comprises: a first layer comprising a nanoporous foam; a second layer, located on said first layer, comprising a microcellular foam having pores larger than said nanoporous foam; and a third layer, located on the second layer, comprising expanded graphite.

Description

Heat insulating material
Technical Field
The present invention relates to a heat insulating material, and more particularly, to a heat insulating material having an improved laminated structure.
Background
Various heat insulating materials are used to improve the heat insulating performance of buildings and the like. The most widely used thermal insulation material is a thermal insulation material made of a foam formed by foaming a resin.
However, since the thermal insulation material formed of a foam body by a foamed resin is limited in terms of its ability to realize thermal insulation performance, it is difficult to ensure sufficient thermal insulation performance. Therefore, a heat insulating material that can achieve sufficient heat insulating performance is required.
Disclosure of Invention
Technical problem
The present invention provides a heat insulating material having excellent heat insulating properties.
Means for solving the problems
The heat insulating material of the embodiment of the invention comprises: a first layer comprising a nanoporous foam; a second layer, located on said first layer, comprising a microcellular foam having pores larger than said nanoporous foam; and a third layer, located on the second layer, comprising expanded graphite.
The average size of the pores of the second layer may be 5 to 30 μm.
The density of the second layer may be less than the density of the first layer.
The ratio of the density of the second layer to the first layer may be 0.2 to 0.4.
The both side outer faces of the above-mentioned heat insulating material may be constituted as follows: the second layer is disposed on each side of the first layer, the third layer is disposed on each side of the second layer, and the second layer is disposed on each side of the first layer.
The first layer is formed of a foam comprising polystyrene and polymethyl methacrylate, the second layer is formed of polystyrene foam, and the third layer may comprise the expanded graphite and polystyrene resin.
The thickness of the first layer is greater than the thickness of the third layer, and the thickness of the second layer may be greater than the thicknesses of the first layer and the third layer.
The heat insulating material may be formed of a plate-shaped heat insulating material.
ADVANTAGEOUS EFFECTS OF INVENTION
In the heat insulating material of the present embodiment, the thermal conductivity due to radiation, a solid phase, and a gas phase is reduced by the laminated structure of the first layer, the second layer, and the third layer, respectively, and thus the thermal conductivity can be effectively reduced. The third layer for reducing heat conduction by radiation is located on the outer surface so as not to transmit heat by radiation to the inside of the heat insulating material, the second layer located inside the third layer reduces heat conduction through a solid phase, and the first layer located innermost reduces heat through a gas phase. In this way, the thermal conductivity can be effectively balanced out according to the stacking order.
Drawings
Fig. 1 is a sectional view schematically showing a heat insulating material according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these embodiments, and can of course be modified in various forms.
In the drawings, parts that are not relevant to the description are omitted for clarity and brief description of the invention, and the same reference numerals are used throughout the description for the same or very similar parts. Further, although the thickness, width, and the like are shown enlarged or reduced in order to more clearly explain in the drawings, the thickness, width, and the like of the present invention are not limited to those shown in the drawings.
Also, throughout the specification, when a certain portion "includes" another portion, it is not intended to exclude the other portion, but may include the other portion, unless otherwise specified. Also, when a layer, film, region, plate, or the like is partially "on" another portion, this includes not only the case of being "directly" on the other portion but also the case of being the other portion in the middle thereof. When a layer, film, region, panel, or the like is "directly" on another portion, it means that no other portion is in the middle.
Hereinafter, a thermal insulation material according to an embodiment of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a sectional view schematically showing a heat insulating material according to an embodiment of the present invention.
Referring to fig. 1, the thermal insulation material (100) according to the embodiment of the present invention includes a first layer (10), a second layer (20), and a third layer (30), wherein the first layer (10) includes a nanoporous foam having first pores (10a) with a nanometer size, the second layer (20) is positioned on the first layer (10) and includes a microporous foam having second pores (20a) larger than the first pores (10a), and the third layer (30) is positioned on the second layer (20) and includes expanded graphite (32). At this time, the second layers (20) are respectively located on both sides of the first layer (10), the third layers (30) are respectively located on the second layers (20), and the second layers (20) are respectively located on both sides of the first layer (10). Thus, the first layer (10) constitutes a central layer, the third layer (30) constitutes the two outer sides of the insulating material (100), and the second layer (20) can be located between the first layer (10) and the third layer (30) of the two outer sides, respectively.
The third layer (30) constituting the outer face of the insulating material (100) contains expanded graphite (32) and therefore acts as a barrier to thermal radiation. The expanded graphite (32) is of a plate-type structure and can absorb all electromagnetic radiation regardless of the incidence angle or the number of vibrations. Also, the tortuous and rough surface of the expanded graphite (32) may cause multiple reflections. Thus, the expanded graphite (32) can effectively block heat radiation. That is, the thermal conductivity (λ) through radiation can be reduced by the third layer (30)rad). The expanded graphite (32) may have a diameter of 5mm or less (for example, a diameter of 1mm to 5mm) and a length of 20mm to 50 mm. The expanded graphite (32) may be included in an amount of 0.01 to 5 weight percent relative to the total 100 weight percent of the third layer (30). In such diameters, lengths and weight percentages, thermal conductivity through radiation is effectively prevented. However, the invention is not so limited and the expanded graphite (32) may have a variety of diameters, lengths and weight percentages. More specifically, the third layer (30) may be a layer in which expanded graphite (32) is dispersed in a resin (34). The resin (34) may include a resin (32) having excellent heat insulating properties, and may include a polystyrene resin, for example. Alternatively, the resin (34) of the third layer (30) may contain the same resin as that (i.e., polystyrene resin) at least partially contained in the first layer (10) and the second layer (20). This is because the third layer (30) contains 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, and thus problems and the like that occur when different substances are used can be prevented. As an example, the third layer (30) may be formed from polystyrene foam containing expanded graphite (32).
Furthermore, the second layer (20) between the first layer (10) and the third layer (30) comprises a microporous foam, whereby the heat conduction through the solid body can be reduced.That is, the thermal conductivity (lambda) through the solid phase can be reduced by the second layer (20)solid). At this time, the second layer (20) has a density smaller than that of the first layer (10), and thus thermal conductivity through a solid can be effectively reduced. For example, the average size of the second pores (20a) of the second layer (20) is 5 μm to 30 μm, and the ratio of the density of the second layer (20) to the first layer (10) (or the relative density of the second layer (20) to the first layer (10)) may be 0.2 to 0.4. In this range, the heat transfer through the solid can be reduced as much as possible.
Furthermore, the first layer (10) comprises a nanoporous foam having first pores (10a) of smaller size than the second pores (20a), thus reducing heat conduction through the gas. That is, the thermal conductivity (λ) through the gas phase can be reduced by the first layer (10)gas). Since the first layer (10) has a porous structure of the first pores (10a) having small sizes, when the gas collides with the nano-pore walls of the first layer (10), it may have a knosen effect of transferring energy. The first layer (10) thus reduces the thermal conductivity through the gas.
At this time, the second layer (20) may be formed of polystyrene foam, and the first layer (10) may be formed of foam including polystyrene and polymethylmethacrylate. Since the foam including polystyrene has a fine independent pore structure, it has excellent heat insulation characteristics and also is resistant to moisture or humidity.
In this manner, in the present embodiment, the thermal conductivity (λ) through the gas phase can be reduced by the first layer (10)gas) The thermal conductivity (lambda) through the solid phase is reduced by means of the second layer (20)solid) The thermal conductivity (lambda) through the radiation is reduced by means of a third layer (30)rad). The thermal conductivity is the thermal conductivity through the gas phase (λ)gas) Thermal conductivity (lambda) through solid phasesolid) And thermal conductivity (λ) by radiationrad) However, in the present embodiment, the thermal conductivity can be effectively reduced by reducing these thermal conductivities individually. Furthermore, the third layer (30) for reducing the thermal conductivity caused by radiation is positioned on the outer surface, so that the heat caused by radiation is prevented from being transferred to the inside of the heat insulating material (100), and the second layer (20) positioned inside the third layer (30) is used for reducing the passing-through and fixingThe heat conduction of the phases reduces the heat conduction through the solid phase in the innermost first layer (10). Thereby effectively reducing the thermal conductivity.
At this time, 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) may be greater than the thickness (T1) of the first layer (10) and the thickness (T3) of the third layer (30), respectively.
The heat insulating material (100) can be used as a plate-like heat insulating material or a heat insulating panel having a thickness in the direction in which the first layer (10), the second layer (20), and the third layer (30) are laminated.
In the drawings, an example is shown in which the first layer (10) and the second layer (20) are formed in contact and the second layer (20) and the third layer (30) are formed in contact, so that thermal conductivity can be minimized with a simple structure. However, the present invention is not limited thereto, and various modifications may be made such as other layers being located between the first layer (10) and the second layer (20) or other layers being located between the second layer (20) and the third layer (30).
The features, structures, effects, and the like described above are included in at least one embodiment of the present invention, but are not limited to one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified by those of ordinary skill in the art to which the embodiments belong. Therefore, it should be construed that the matters relating to these combinations and variations are included in the scope of the present invention.

Claims (6)

1. An insulating material, comprising:
a first layer comprising a nanoporous foam;
a second layer, located on said first layer, comprising a microcellular foam having pores larger than said nanoporous foam; and
a third layer, located on the second layer, comprising expanded graphite;
wherein the expanded graphite of the third layer is 0.01 to 5% by weight relative to 100% by weight of the third layer, and
the diameter of the expanded graphite is 1mm to 5mm, and the length of the expanded graphite is 20mm to 50 mm;
wherein the first layer is formed of a foam comprising polystyrene and polymethyl methacrylate, the second layer is formed of a polystyrene foam, and the third layer comprises the expanded graphite and a polystyrene resin; and is
Wherein the first layer has a thickness greater than that of the third layer, and the second layer has a thickness greater than that of each of the first layer and the third layer.
2. A thermal insulation material as claimed in claim 1, wherein said pores of said second layer have an average size of 5 μm to 30 μm.
3. A thermal insulation material as claimed in claim 1, wherein the density of said second layer is less than the density of said first layer.
4. A thermal insulation material as claimed in claim 1, wherein the ratio of the density of said second layer to said first layer is 0.2 to 0.4.
5. A thermal insulation material as claimed in claim 1, wherein the exterior of the thermal insulation material on both sides is formed by: the second layers are respectively positioned on both sides of the first layer, and the third layers are respectively positioned on the second layers.
6. A thermal insulation material as claimed in claim 1, wherein said thermal insulation material is a plate-like thermal insulation material.
CN201580085822.7A 2015-12-21 2015-12-21 Heat insulating material Active CN108779639B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/014006 WO2017111181A1 (en) 2015-12-21 2015-12-21 Heat insulating material

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CN108779639A CN108779639A (en) 2018-11-09
CN108779639B true CN108779639B (en) 2021-02-19

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WO (1) WO2017111181A1 (en)

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KR101060311B1 (en) * 2011-03-29 2011-08-31 폴머(주) Flame-retardant board complex having excellent insulation property and panel using the same
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100982176B1 (en) * 2010-03-05 2010-09-14 김주영 Flame-proof and thermal insulating paste composition containing expanded graphite and flame-proof thermal insulating material using the same
CN103649436A (en) * 2011-07-12 2014-03-19 沙特基础创新塑料Ip私人有限责任公司 A multiwall sheet, methods of making, and articles comprising the multiwall sheet
KR20150021461A (en) * 2013-08-19 2015-03-02 주식회사 아모그린텍 Heat insulation sheet, method for manufacturing the same and heat insulating panel
CN103553543A (en) * 2013-10-28 2014-02-05 河北工业大学 Preparation method of flame-retardant insulation board for building exterior wall

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KR102082918B1 (en) 2020-03-02
CN108779639A (en) 2018-11-09
KR20180091846A (en) 2018-08-16
WO2017111181A1 (en) 2017-06-29

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