WO2011152610A1 - Vacuum insulation panel, and preparation method thereof - Google Patents

Vacuum insulation panel, and preparation method thereof Download PDF

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Publication number
WO2011152610A1
WO2011152610A1 PCT/KR2011/001952 KR2011001952W WO2011152610A1 WO 2011152610 A1 WO2011152610 A1 WO 2011152610A1 KR 2011001952 W KR2011001952 W KR 2011001952W WO 2011152610 A1 WO2011152610 A1 WO 2011152610A1
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WO
WIPO (PCT)
Prior art keywords
airgel
insulation panel
natural fiber
vacuum insulation
sheet
Prior art date
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PCT/KR2011/001952
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French (fr)
Korean (ko)
Inventor
박규철
Original Assignee
Park Kyoo Chul
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Publication of WO2011152610A1 publication Critical patent/WO2011152610A1/en

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    • 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
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • 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
    • E04B1/803—Heat insulating elements slab-shaped with vacuum spaces included in the slab
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/06—Coating on the layer surface on metal layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • 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
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional 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
    • B32B2607/00—Walls, panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/242—Slab shaped vacuum insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10—Insulation, e.g. vacuum or aerogel insulation

Definitions

  • the present invention relates to a vacuum insulation panel and a method of manufacturing the same, and more particularly, to an environmentally friendly vacuum insulation panel and a method of manufacturing the same by using a natural fiber and aerogel with excellent thermal insulation effect.
  • Insulation is generally used as a material to block the flow of heat, the most commonly used insulation for refrigerators, freezers and buildings.
  • the thermal insulation should have excellent thermal insulation performance as well as the high temperature insulation material to withstand high temperatures. Insulation should not crumble at low temperatures, do not absorb water, and should not change shape or degrade thermal insulation performance after prolonged use.
  • Insulation materials used in refrigerators currently use polyurethane foam insulation materials. Filling method of the insulation of the refrigerator is filled by injecting polyurethane and foaming material into the space between the vacuum-formed inner wound and the steel outer wound with ABS resin, and then closing the injection hole.
  • the cyclopentane and freon gas are used as the refrigerant. Therefore, the harmfulness of chlorine gas, which is a source of destruction of the ozone layer, is a problem.
  • Styrofoam is mainly used as the insulation material of buildings, but the thicker the styrofoam, the better the insulation performance, so there is a problem that the volume becomes large to secure sufficient insulation. In case of fire of the building, toxic gas is generated, which causes environmental pollution. There is a problem that the insulation can not be recycled and become industrial waste.
  • Aerogel is a material composed of silicon oxide (SiO 2 ) and is composed of extremely coarse entangled hair-like silica (SiO 2 ), which is one hundredth the thickness of hair, and has a porosity of 90% or more and a specific surface area of several hundred to 1500 m. It is a transparent ultra-low density material of about 2 / g. Since the porous airgel has high light transmittance and low thermal conductivity, the porous airgel has not only high potential as a heat insulating material, but also has been evaluated as a very efficient super insulation material that can be used in refrigerators, building materials, automobiles and aircraft.
  • aerogels produced in the form of powders or particles have very weak strengths such as brittleness due to their high brittleness, and are easily broken even by small impacts. There is a problem that the application is very difficult.
  • an object of the present invention is to provide a vacuum insulation panel and a method of manufacturing the improved thermal insulation than conventional styrofoam or polyurethane foam.
  • an object of the present invention is to provide an environmentally friendly and recyclable vacuum insulation panel and a method of manufacturing the same by using natural fibers and airgel.
  • an object of the present invention is to provide a vacuum insulation panel and a method of manufacturing the same, which can be easily manufactured without lowering the heat insulating properties of a difficult-to-process airgel.
  • Vacuum insulation panel to achieve the above object is an airgel sheet having an airgel on the surface or inside of the natural fiber sheet; Filler in which a plurality of airgel sheets are laminated; And an outer shell material coated with a resin on the inner and outer surfaces of the aluminum thin film forming the inner space portion to surround the filler, wherein the inner space portion is vacuum.
  • the airgel sheet is characterized in that the airgel is scattered on the surface of the natural fiber sheet.
  • the airgel sheet in the vacuum insulation panel of the present invention is characterized in that the airgel is carried in the internal pores of the natural fiber sheet.
  • the natural fiber sheet and the aerogel are combined with an inorganic binder, and the inorganic binder is selected from at least one of water glass, aluminum chelate, cooidal silica, alumina sol and boric acid.
  • the method of manufacturing a vacuum insulation panel comprises the steps of preparing an outer cover material by coating a resin on the inner and outer surfaces of the aluminum thin film; Preparing an airgel sheet by scattering the airgel on the surface of the natural fiber sheet or supporting the airgel inside the natural fiber sheet; Stacking a plurality of airgel sheets to prepare a filler; And mounting the envelope to the mold and filling the filler into the inner space of the envelope and heat-sealing the opening of the envelope to 120 to 250 ° C. under reduced pressure with a vacuum of 10 ⁇ 4 Torr to 10 ⁇ 6 Torr. Characterized in that.
  • the thickness is thinner than the conventional heat insulating materials such as styrofoam or polyurethane foam, and has excellent heat insulating properties, thereby saving energy.
  • the vacuum insulation panel according to the present invention and a method for manufacturing the same, it is possible to prevent environmental pollution by using a natural fiber sheet and aerogel, and to recover and recycle the insulation when disposing of the refrigerator or dismantling the building.
  • the vacuum insulation panel and the method for manufacturing the same according to the present invention it is possible to easily manufacture a vacuum insulation panel while maintaining the insulation performance of the airgel despite the weak brittleness of the airgel.
  • FIG. 1 is a cross-sectional view showing an embodiment of a vacuum insulation panel according to the present invention.
  • FIG. 2 is a cross-sectional view showing another embodiment of a vacuum insulation panel according to the present invention.
  • FIG 3 is a partial schematic view showing a state in which the filler is inserted into the outer shell material in the method of manufacturing a vacuum insulation panel according to the present invention.
  • Figure 4 is a partial schematic view showing a state in which the opening of the shell material is sealed by the heat fusion roll in the manufacturing method of the vacuum insulation panel according to the present invention.
  • FIG. 1 is a cross-sectional view of a vacuum insulation panel showing an embodiment according to the present invention
  • Figure 2 is a cross-sectional view of a vacuum insulation panel showing another embodiment according to the present invention
  • Figure 3 is a vacuum insulation panel according to the present invention
  • Figure 4 is a partial schematic view showing a state in which the filler is inserted into the outer shell material in the manufacturing method
  • Figure 4 is a partial schematic view showing the opening of the outer shell material sealed by the heat-sealing roll in the manufacturing method of the vacuum insulation panel according to the present invention.
  • the vacuum insulation panel 30 of the present invention comprises an airgel sheet 13 having an airgel 17 on the surface or inside of the natural fiber sheet 15; A filler 10 in which a plurality of airgel sheets 13 are stacked; And an outer shell material 20 coated with a resin on the inner and outer surfaces of the aluminum thin film 23 forming the inner space portion 29 to surround the filler 10, wherein the inner space portion 29 is a vacuum.
  • the airgel sheet 13 according to the present invention has an airgel 17 on the surface or inside of the natural fiber sheet 15, the filler 10 is a plurality of airgel sheet 13 is laminated.
  • the filler 10 is made of a single airgel sheet 13
  • the thickness of the natural fiber sheet must be formed thick to secure the heat insulation effect, and the heat insulation effect is reduced when used for a long time. Therefore, the filler is preferably formed by laminating a plurality of airgel sheets.
  • the filler only means that the airgel sheets are laminated in two or more layers, and the number of laminations is not particularly limited.
  • the thickness of each laminated single airgel sheet 13 is preferably about 10 ⁇ 200mm can be manufactured, it can be produced in a suitable thickness according to the needs of the application field.
  • the thickness of the insulation may be thicker.
  • the vacuum insulation panel of the present invention even when using the cyclopentane as a refrigerant refrigerant can significantly reduce the thickness of the heat insulating material than before, and the heat insulating effect is also excellent.
  • the airgel 17 of the present invention is a transparent ultra-low density material having a porosity of 90% or more and a specific surface area of several hundred to 1500 m 2 / g.
  • silica airgel has a pore size of about 1-50 nm and a porosity of 90% or more.
  • the airgel 17 since the airgel 17 is mostly made of a gas in a pore having relatively low thermal conductivity, the airgel 17 may exhibit excellent heat insulating effect. Therefore, since the thermal conductivity of the airgel 17 is very small, about 0.005 to 0.010 W / m ⁇ K, the thermal insulation performance is superior to that of a conventional polyurethane foam or styrofoam, and an environmentally friendly vacuum insulation panel can be manufactured.
  • Aerogel manufacturing process of the present invention may be made of a sol-gel process and a wet gel drying process for producing a wet gel.
  • the wet gel prepared by the sol-gel process is filled with alcohol, and when the alcohol is evaporated in the air, pores disappear. Therefore, it is preferable to use a supercritical drying process for drying at high temperature and pressure.
  • a method of manufacturing the airgel 17 may be used by chemically modifying the surface of the solvent replacement and the wet gel and then heat treating.
  • the present invention can be produced by the airgel by a method other than the above-described manufacturing process, if the porosity of the prepared airgel is 90% or more of the transparent opaque airgel as well as opaque airgel prepared by mixing carbon black, etc.
  • the porosity of the prepared airgel is 90% or more of the transparent opaque airgel as well as opaque airgel prepared by mixing carbon black, etc.
  • the content of the airgel 17 is preferably 20 to 70wt% of the airgel 17 based on the total weight of the vacuum insulation panel 30. If the content of the airgel 17 is less than 20wt%, the thermal insulation performance may be lowered, and if the content of the airgel 17 is higher than 70wt%, it may cause an increase in product cost and manufacturing inconvenience.
  • the airgel 17 according to the present invention is a particle in powder or bead form, and an airgel hydrophobically treated may be used. In the case of hydrophobic surface treatment, it is possible to form uniform pores inside the water by preventing penetration of moisture.
  • the airgel of the present invention is made of water glass or alkoxy silane as a raw material, and may be one that is surface-hydrophobized with silyl groups.
  • silylating agent examples include hexamethyldisilane, ethyltrimethoxysilane, ethyltriethoxysilane, triethylethoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, trimethylchlorosilane, and the like.
  • a hydrophobic surface-treated airgel as described above, the thermal insulation performance can be maintained even if used for a long time, so even when disposing of household appliances such as a refrigerator or dismantling a building, the insulation inside can be recycled. It does not use freon gas, which is mainly used in the building, and it is effective in preventing pollution since there is less generation of harmful gases even when burning buildings.
  • Natural fiber sheet 15 is preferably used to make a natural material of cotton or cotton material in the form of a sheet.
  • Cotton wool itself contains many pores, so it can carry a powdery airgel even without a separate binder or needle punching process.
  • cotton, cotton, wool, silk, linen material and the like can be used.
  • the airgel sheet 13 according to the present invention may be made by scattering the airgel 17 on the surface of the natural fiber sheet 15.
  • the airgel sheet 13 according to the present invention may be made by supporting the airgel 17 in the internal pores of the natural fiber sheet (15).
  • the shape of the airgel sheet 13 according to the present invention may vary depending on the type of natural fiber sheet 15 and the size of the airgel 17 particles.
  • the natural fiber 15 and The airgel 17 may be in the form of a layer.
  • the process of scattering the airgel 17 on the surface of the natural fiber sheet 15 is to spray the airgel 17 in the form of powder or bead, and to separate adhesive by the interlaced fibers of the natural fiber sheet 15 itself. You can not use a binder.
  • the aerogel 17 having a particle diameter of less than 1 mm may be supported in the natural fiber sheet 15.
  • a binder or an adhesive may be used to secure a strong bond between the natural fiber sheet 15 and the airgel 17.
  • the inorganic binder according to the present invention may be selected from at least one of water glass, aluminum chelate, coroidal silica, alumina sol and boric acid.
  • the envelope 20 according to the present invention is a coating of resin on the outer and inner surfaces of the aluminum thin film 23.
  • the outer surface of the aluminum thin film 23 may be coated with a polyester resin or ethylene vinyl alcohol (EVOH) that can withstand the external impact.
  • the inner surface of the aluminum thin film 23 may be coated with polyethylene resin, polypropylene resin, polyacrylonitrile, and the like, which are easily heat-sealed.
  • FIG 3 is a partial schematic view showing a state in which the filler is inserted into the outer shell material in the manufacturing method of the vacuum insulation panel according to the present invention
  • Figure 4 is an opening of the outer shell material in the manufacturing method of the vacuum insulation panel according to the present invention in the heat-sealed roll It is a partial schematic diagram which showed the state sealed by.
  • the vacuum insulation panel 30 of the present invention comprises the steps of manufacturing an outer shell material 20 by coating a resin on the inner and outer surfaces of the aluminum thin film 23; Preparing an airgel sheet 13 by scattering the airgel 17 on the surface of the natural fiber sheet 15 or supporting the airgel inside the natural fiber sheet; Manufacturing a filler 10 by stacking a plurality of airgel sheets 13; And the envelope 20 in the mold and the filler 10 filled in the inner space 29 of the envelope 20 and under reduced pressure with a vacuum of 10 -4 Torr to 10 -6 Torr. It is prepared to include; heat-sealing the opening 27 of the 20 to 120 ⁇ 250 °C.
  • Openings 27 are formed on one side of the outer cover material 20 according to the present invention so that the filler 10 can be inserted therein, and then the fillers 10 are inserted, and the openings 27 are heat-sealed in a vacuum state. Seal.
  • the outer coating material coated on the inner surface of the aluminum thin film is thermally fused to each other, and polyethylene resin, polypropylene resin, and polyacrylonitrile are bonded and sealed by a heat fusion roll heated at a temperature range of 120 to 250 ° C. .
  • the outer cover material 20 can be more easily and efficiently bonded and sealed.
  • the inner space portion 29 according to the present invention is a vacuum state sealed under reduced pressure, and the vacuum degree is preferably in the range of 10 ⁇ 4 Torr to 10 ⁇ 6 Torr. Since the vacuum state is the absence of air, conduction through air or convection heat transfer does not occur, and thus serves as a heat insulating material to block heat transfer.
  • vacuum insulation panel 40 heat fusion roll

Abstract

The present invention relates to a vacuum insulation panel (30) comprising: an aerogel sheet (13) having aerogel (17) on the surface of or inside a natural fiber sheet (15); a filling material (10) in which a plurality of the aerogel sheets (13) are laminated; and an outer skin material (20) in which a resin is coated on the inner and outer surfaces of an aluminum thin film (23) forming an inner space portion (29) to encompass the filling material (10), wherein the inner space portion (29) is in the vacuum state, and a preparation method thereof. According to the present invention, it is possible to provide a vacuum insulation panel which is excellent in heat insulation, is environmentally friendly and can be recycled, as an insulation material using aerogel and a natural fiber, and a method for preparing a vacuum insulation panel which does not deteriorate the excellent heat insulation characteristics of aerogel.

Description

진공 단열 패널 및 그 제조방법Vacuum Insulation Panel and Manufacturing Method Thereof
본 발명은 진공 단열 패널 및 그 제조방법에 관한 것으로서 보다 상세하게는, 단열효과가 우수하여 에너지 절감효과가 있으며 천연섬유와 에어로겔을 사용함으로써 친환경적인 진공 단열 패널 및 그 제조방법에 관한 것이다.The present invention relates to a vacuum insulation panel and a method of manufacturing the same, and more particularly, to an environmentally friendly vacuum insulation panel and a method of manufacturing the same by using a natural fiber and aerogel with excellent thermal insulation effect.
일반적으로 단열재란 열의 흐름을 차단하는 재료로서 가장 많이 사용되는 것은 냉장고, 냉동 창고와 건물을 지을 때 많은 단열재가 사용된다. 이러한 단열재가 갖추어야할 성능으로는 첫째로 열전도도가 작아 단열성능이 우수해야 함은 물론이고 고온단열재는 고온에 견딜 수 있어야 한다. 보냉재는 저온에서 부스러지지 않아야 하고 물을 흡수하지 않아야 하며 또한 장시간 사용하여도 형태가 변하거나 단열성능이 저하되지 않아야 한다. Insulation is generally used as a material to block the flow of heat, the most commonly used insulation for refrigerators, freezers and buildings. First, the thermal insulation should have excellent thermal insulation performance as well as the high temperature insulation material to withstand high temperatures. Insulation should not crumble at low temperatures, do not absorb water, and should not change shape or degrade thermal insulation performance after prolonged use.
현재 냉장고에 사용되고 있는 단열재는 대부분 폴리우레탄폼 단열재를 사용하고 있다. 냉장고의 단열재 충전 방법은 ABS수지로 진공성형한 내상과 철제의 외상사이의 공간에 폴리우레탄과 발포재 등을 주입하여 충진한 후 주입구를 밀폐시키게 되는데 이때 냉매로서 사이크로펜탄 및 프레온가스를 사용하기 때문에 오존층을 파괴시키는 원인물질인 염소가스의 유해성이 문제된다.Insulation materials used in refrigerators currently use polyurethane foam insulation materials. Filling method of the insulation of the refrigerator is filled by injecting polyurethane and foaming material into the space between the vacuum-formed inner wound and the steel outer wound with ABS resin, and then closing the injection hole. In this case, the cyclopentane and freon gas are used as the refrigerant. Therefore, the harmfulness of chlorine gas, which is a source of destruction of the ozone layer, is a problem.
건물의 단열재로는 스티로폼이 주로 사용되고 있으나 스티로폼이 두께울수록 단열성능이 향상되므로 충분한 단열성을 확보하려면 부피가 커진다는 문제점이 있으며 건물의 화재시에는 유독가스가 발생하여 환경오염이 되고 건물의 철거시 단열재를 재활용할 수 없고 산업폐기물이 된다는 문제점이 있다. Styrofoam is mainly used as the insulation material of buildings, but the thicker the styrofoam, the better the insulation performance, so there is a problem that the volume becomes large to secure sufficient insulation. In case of fire of the building, toxic gas is generated, which causes environmental pollution. There is a problem that the insulation can not be recycled and become industrial waste.
이를 해결하기 위해 신소재인 고효율, 친환경적인 에어로겔의 연구가 이루어지고 있다. 에어로겔은 규소산화물(SiO2)로 이루어진 물질로서 머리카락의 1만분의 1굵기인 실모양의 실리카(SiO2)가 극히 성글게 얽혀 이루어진 입자상으로 구조이며 기공율이 90%이상이고, 비표면적이 수백 내지 1500m2/g정도인 투명한 극저밀도의 첨단소재이다. 이러한 다공성 에어로겔은 높은 투광성과 낮은 열전도도의 특성을 갖기 때문에 단열재로서의 높은 잠재력을 가지고 있을 뿐만 아니라, 냉장고, 건축자재, 자동차 및 항공기 등에 사용될 수 있는 매우 효율적인 초단열재로 평가받고 있다. In order to solve this problem, research on a new material, high efficiency and eco-friendly airgel has been conducted. Aerogel is a material composed of silicon oxide (SiO 2 ) and is composed of extremely coarse entangled hair-like silica (SiO 2 ), which is one hundredth the thickness of hair, and has a porosity of 90% or more and a specific surface area of several hundred to 1500 m. It is a transparent ultra-low density material of about 2 / g. Since the porous airgel has high light transmittance and low thermal conductivity, the porous airgel has not only high potential as a heat insulating material, but also has been evaluated as a very efficient super insulation material that can be used in refrigerators, building materials, automobiles and aircraft.
일반적으로 분말 또는 입자의 형태로 제조되는 에어로겔은 높은 취성으로 인해 작은 충격에도 쉽게 부서지는 등 매우 취약한 강도를 가지고 있으며, 다양한 두께 및 형태로의 가공이 어렵기 때문에 우수한 단열 특성에도 불구하고 단열재로의 응용이 매우 어렵다는 문제점이 있다. In general, aerogels produced in the form of powders or particles have very weak strengths such as brittleness due to their high brittleness, and are easily broken even by small impacts. There is a problem that the application is very difficult.
이에 본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로서, 기존의 단열재인 스티로폼이나 폴리우레탄폼보다 단열성이 향상된 진공 단열 패널 및 그 제조방법을 제공하는 것을 목적으로 한다.Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a vacuum insulation panel and a method of manufacturing the improved thermal insulation than conventional styrofoam or polyurethane foam.
또한, 본 발명은 천연섬유와 에어로겔을 사용함으로써 친환경적이고 재활용이 가능한 진공 단열 패널 및 그 제조방법을 제공하는 것을 목적으로 한다.In addition, an object of the present invention is to provide an environmentally friendly and recyclable vacuum insulation panel and a method of manufacturing the same by using natural fibers and airgel.
또한, 본 발명은 가공이 어려운 에어로겔의 단열특성을 저하시키지 않으면서도 용이하게 제조할 수 있는 진공 단열 패널 및 그 제조방법을 제공하는 것을 목적으로 한다.In addition, an object of the present invention is to provide a vacuum insulation panel and a method of manufacturing the same, which can be easily manufactured without lowering the heat insulating properties of a difficult-to-process airgel.
상기한 목적을 달성하기 위하여 본 발명에 따른 진공 단열 패널은 천연섬유시트의 표면 또는 내부에 에어로겔을 갖는 에어로겔시트; 에어로겔시트가 다수 적층된 충진재; 및 충진재를 둘러싸도록 내공간부를 형성하는 알루미늄 박막의 내외부면에 수지가 코팅된 외피재를 포함하되, 내공간부는 진공인 것을 특징으로 한다.Vacuum insulation panel according to the present invention to achieve the above object is an airgel sheet having an airgel on the surface or inside of the natural fiber sheet; Filler in which a plurality of airgel sheets are laminated; And an outer shell material coated with a resin on the inner and outer surfaces of the aluminum thin film forming the inner space portion to surround the filler, wherein the inner space portion is vacuum.
또한, 본 발명의 진공 단열 패널에 있어서 에어로겔시트는 천연섬유시트 표면에 에어로겔이 스캐터링되어 이루어지는 것을 특징으로 한다.In the vacuum insulation panel of the present invention, the airgel sheet is characterized in that the airgel is scattered on the surface of the natural fiber sheet.
또한, 본 발명의 진공 단열 패널에 있어서 에어로겔시트는 천연섬유시트의 내부 기공에 에어로겔이 담지되어 이루어지는 것을 특징으로 한다.In addition, the airgel sheet in the vacuum insulation panel of the present invention is characterized in that the airgel is carried in the internal pores of the natural fiber sheet.
또한, 본 발명의 진공 단열 패널에 있어서 천연섬유시트와 에어로겔이 무기 바인더로 결합되되, 무기 바인더는 워터 글래스, 알루미늄킬레이트, 코로이달실리카, 알루미나졸 및 붕산 중에서 적어도 하나 선택되는 것을 특징으로 한다.In addition, in the vacuum insulation panel of the present invention, the natural fiber sheet and the aerogel are combined with an inorganic binder, and the inorganic binder is selected from at least one of water glass, aluminum chelate, cooidal silica, alumina sol and boric acid.
또한, 본 발명에 따른 진공 단열 패널의 제조방법은 알루미늄 박막의 내외부면에 수지를 코팅하여 외피재를 제조하는 단계; 천연섬유시트의 표면에 에어로겔을 스캐터링하거나 또는 천연섬유시트 내부에 에어로겔을 담지시켜 에어로겔시트를 제조하는 단계; 에어로겔시트 다수를 적층하여 충진재를 제조하는 단계; 및 외피재를 몰드에 장착하고 충진재를 외피재의 내공간부에 충진하며 10-4Torr~10-6Torr의 진공도로 감압 진공한 상태에서 외피재의 개구부를 120~250℃로 열융착시키는 단계;를 포함하는 것을 특징으로 한다.In addition, the method of manufacturing a vacuum insulation panel according to the present invention comprises the steps of preparing an outer cover material by coating a resin on the inner and outer surfaces of the aluminum thin film; Preparing an airgel sheet by scattering the airgel on the surface of the natural fiber sheet or supporting the airgel inside the natural fiber sheet; Stacking a plurality of airgel sheets to prepare a filler; And mounting the envelope to the mold and filling the filler into the inner space of the envelope and heat-sealing the opening of the envelope to 120 to 250 ° C. under reduced pressure with a vacuum of 10 −4 Torr to 10 −6 Torr. Characterized in that.
이상과 같은 구성의 본 발명에 따른 진공 단열 패널 및 그 제조방법에 의하면, 기존의 스티로폼이나 폴리우레탄폼 등의 단열재보다 두께가 얇으면서 우수한 단열성을 갖추어 에너지를 절감하는 효과가 있다.According to the vacuum insulation panel and the method of manufacturing the same according to the present invention having the above configuration, the thickness is thinner than the conventional heat insulating materials such as styrofoam or polyurethane foam, and has excellent heat insulating properties, thereby saving energy.
또한, 본 발명에 따른 진공 단열 패널 및 그 제조방법에 의하면 천연섬유시트와 에어로겔을 사용함으로써 환경 오염을 방지할 수 있으며, 냉장고를 폐기하거나 건물을 철거하는 경우에 단열재를 회수하여 재활용할 수 있다.In addition, according to the vacuum insulation panel according to the present invention and a method for manufacturing the same, it is possible to prevent environmental pollution by using a natural fiber sheet and aerogel, and to recover and recycle the insulation when disposing of the refrigerator or dismantling the building.
또한, 본 발명에 따른 진공 단열 패널 및 그 제조방법에 의하면 에어로겔의 약한 취성에도 불구하고 에어로겔의 단열성능을 유지하면서 용이하게 진공 단열 패널을 제조할 수 있다. In addition, according to the vacuum insulation panel and the method for manufacturing the same according to the present invention, it is possible to easily manufacture a vacuum insulation panel while maintaining the insulation performance of the airgel despite the weak brittleness of the airgel.
도 1은 본 발명에 따른 진공 단열 패널의 일 실시예를 도시하는 단면도이다.1 is a cross-sectional view showing an embodiment of a vacuum insulation panel according to the present invention.
도 2는 본 발명에 따른 진공 단열 패널의 다른 실시예를 도시하는 단면도이다.2 is a cross-sectional view showing another embodiment of a vacuum insulation panel according to the present invention.
도 3은 본 발명에 따른 진공 단열 패널의 제조방법에서 충진재를 외피재에 삽입하는 모습을 나타낸 부분 개략도이다.3 is a partial schematic view showing a state in which the filler is inserted into the outer shell material in the method of manufacturing a vacuum insulation panel according to the present invention.
도 4는 본 발명에 따른 진공 단열 패널의 제조방법에서 외피재의 개구부가 열융착 롤에 의하여 밀봉되는 모습을 나타낸 부분 개략도이다. Figure 4 is a partial schematic view showing a state in which the opening of the shell material is sealed by the heat fusion roll in the manufacturing method of the vacuum insulation panel according to the present invention.
이하 본 발명의 바람직한 실시예에 대하여 첨부된 도면을 참조하여 보다 구체적으로 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명의 설명에서 동일 또는 유사한 구성요소는 동일 또는 유사한 도면번호를 부여하고, 그 자세한 설명은 생략하기로 한다.In the description of the present invention, the same or similar components are given the same or similar reference numerals, and detailed description thereof will be omitted.
도 1은 본 발명에 따른 일 실시예를 도시하는 진공 단열 패널의 단면도이고, 도 2는 본 발명에 따른 다른 실시예를 도시하는 진공 단열 패널의 단면도이며, 도 3은 본 발명에 따른 진공 단열 패널의 제조방법에서 충진재를 외피재에 삽입하는 모습을 나타낸 부분 개략도이고, 도 4는 본 발명에 따른 진공 단열 패널의 제조방법에서 외피재의 개구부가 열융착 롤에 의하여 밀봉되는 모습을 나타낸 부분 개략도이다.1 is a cross-sectional view of a vacuum insulation panel showing an embodiment according to the present invention, Figure 2 is a cross-sectional view of a vacuum insulation panel showing another embodiment according to the present invention, Figure 3 is a vacuum insulation panel according to the present invention Figure 4 is a partial schematic view showing a state in which the filler is inserted into the outer shell material in the manufacturing method, Figure 4 is a partial schematic view showing the opening of the outer shell material sealed by the heat-sealing roll in the manufacturing method of the vacuum insulation panel according to the present invention.
도 1 내지 도 4에 도시된 바와 같이, 본 발명의 진공 단열 패널(30)은 천연섬유시트(15)의 표면 또는 내부에 에어로겔(17)을 갖는 에어로겔시트(13); 상기 에어로겔시트(13)가 다수 적층된 충진재(10); 및 상기 충진재(10)를 둘러싸도록 내공간부(29)를 형성하는 알루미늄 박막(23)의 내외부면에 수지가 코팅된 외피재(20)를 포함하되, 상기 내공간부(29)는 진공인 것이다.As shown in Figures 1 to 4, the vacuum insulation panel 30 of the present invention comprises an airgel sheet 13 having an airgel 17 on the surface or inside of the natural fiber sheet 15; A filler 10 in which a plurality of airgel sheets 13 are stacked; And an outer shell material 20 coated with a resin on the inner and outer surfaces of the aluminum thin film 23 forming the inner space portion 29 to surround the filler 10, wherein the inner space portion 29 is a vacuum.
본 발명에 따른 에어로겔시트(13)는 천연섬유시트(15)의 표면 또는 내부에 에어로겔(17)을 갖고, 충진재(10)는 에어로겔시트(13)가 다수 적층된 것이다. 충진재(10)가 단일의 에어로겔시트(13)로 이루어지는 경우에는 단열효과를 확보하기 위해 천연섬유시트의 두께를 두껍게 형성하여야 하고, 장기간 사용시 단열효과가 감소하게 된다. 따라서 충진재는 에어로겔시트를 다수 적층되어 형성되는 것이 바람직하다. 다만 충진재는 에어로겔시트가 2층 이상 적층되는 것을 의미하는 것일 뿐, 적층수를 특히 제한할 필요는 없다. 한편 각 적층되는 단일의 에어로겔시트(13)의 두께가 바람직하게는 약 10~200mm인 것으로 제조될 수 있으며, 적용분야의 필요에 따라 적절한 두께로 제작할 수 있다.The airgel sheet 13 according to the present invention has an airgel 17 on the surface or inside of the natural fiber sheet 15, the filler 10 is a plurality of airgel sheet 13 is laminated. When the filler 10 is made of a single airgel sheet 13, the thickness of the natural fiber sheet must be formed thick to secure the heat insulation effect, and the heat insulation effect is reduced when used for a long time. Therefore, the filler is preferably formed by laminating a plurality of airgel sheets. However, the filler only means that the airgel sheets are laminated in two or more layers, and the number of laminations is not particularly limited. On the other hand, the thickness of each laminated single airgel sheet 13 is preferably about 10 ~ 200mm can be manufactured, it can be produced in a suitable thickness according to the needs of the application field.
냉장고의 경우 냉매로서 프레온가스 대신에 싸이크로펜탄을 사용하는 경우에 단열재의 두께가 더 두꺼워질 수 있다. 그러나 본 발명의 진공 단열 패널을 사용하는 경우에는 냉장고 냉매로서 싸이크로펜탄을 사용하더라도 단열재의 두께를 기존보다 현저히 줄일 수 있고, 단열효과도 더 우수하다.In the case of the refrigerator, when the cyclopentane is used instead of the Freon gas as the refrigerant, the thickness of the insulation may be thicker. However, in the case of using the vacuum insulation panel of the present invention, even when using the cyclopentane as a refrigerant refrigerant can significantly reduce the thickness of the heat insulating material than before, and the heat insulating effect is also excellent.
본 발명의 에어로겔(17)은 기공율이 90%이상이고, 비표면적이 수백 내지 1500m2/g정도인 투명한 극저밀도의 첨단소재이다. 특히 실리카 에어로겔은 기공크기 는 1~50nm정도이고, 기공률은 90%이상이다. 그리고 에어로겔(17)은 열전달이 대부분 열전도도가 상대적으로 낮은 기공 내 기체에 의해 이루어지므로 우수한 단열효과를 발휘할 수 있다. 따라서 에어로겔(17)의 열전전도는 0.005~0.010W/mㆍK정도로 매우 작으므로, 종래의 폴리우레탄폼이나 스티로폼에 비해 단열성능이 우수하고, 친환경적인 진공 단열 패널을 제조할 수 있다.The airgel 17 of the present invention is a transparent ultra-low density material having a porosity of 90% or more and a specific surface area of several hundred to 1500 m 2 / g. In particular, silica airgel has a pore size of about 1-50 nm and a porosity of 90% or more. In addition, since the airgel 17 is mostly made of a gas in a pore having relatively low thermal conductivity, the airgel 17 may exhibit excellent heat insulating effect. Therefore, since the thermal conductivity of the airgel 17 is very small, about 0.005 to 0.010 W / m · K, the thermal insulation performance is superior to that of a conventional polyurethane foam or styrofoam, and an environmentally friendly vacuum insulation panel can be manufactured.
본 발명의 에어로겔 제조공정은 습윤겔을 제조하는 졸-겔 공정 및 습윤겔 건조공정으로 이루어질 수 있다. 그리고 졸-겔 공정으로 제조된 습윤겔은 알코올로 채워져 있고, 알코올을 대기 중에서 증발시킬 경우에는 기공이 소멸하게 되므로 높은 온도와 압력에서 건조시키는 초임계건조 공정을 이용하는 것이 바람직하다. Aerogel manufacturing process of the present invention may be made of a sol-gel process and a wet gel drying process for producing a wet gel. The wet gel prepared by the sol-gel process is filled with alcohol, and when the alcohol is evaporated in the air, pores disappear. Therefore, it is preferable to use a supercritical drying process for drying at high temperature and pressure.
또한, 초임계건조 공정의 높은 생산원가를 고려하여, 용매치환 및 습윤겔의 표면을 화학적으로 개질한 후 열처리함으로써 상기 에어로겔(17)을 제조하는 방법을 이용할 수도 있다. In addition, in consideration of the high production cost of the supercritical drying process, a method of manufacturing the airgel 17 may be used by chemically modifying the surface of the solvent replacement and the wet gel and then heat treating.
또한 본 발명은 상기한 제조공정 이외의 다른 방법에 의해 에어로겔을 제조할 수 있으며, 제조된 에어로겔의 기공율이 90% 이상이라면 투명한 실리카 에어로겔은 물론 카본블랙 등이 혼합되어 제조된 불투명한 에어로겔 모두 본 발명의 실시에 해당한다.In addition, the present invention can be produced by the airgel by a method other than the above-described manufacturing process, if the porosity of the prepared airgel is 90% or more of the transparent opaque airgel as well as opaque airgel prepared by mixing carbon black, etc. Corresponds to the implementation of
에어로겔(17)의 함량은 상기 진공 단열 패널(30)의 총 중량을 기준으로 상기 에어로겔(17)이 20~70wt%인 것이 바람직하다. 에어로겔(17) 함량이 20wt%미만이면 단열성능이 저하될 수 있고, 70wt%를 초과하면 제품 단가의 상승과 제조상 불편함을 초래할 수 있기 때문이다.The content of the airgel 17 is preferably 20 to 70wt% of the airgel 17 based on the total weight of the vacuum insulation panel 30. If the content of the airgel 17 is less than 20wt%, the thermal insulation performance may be lowered, and if the content of the airgel 17 is higher than 70wt%, it may cause an increase in product cost and manufacturing inconvenience.
본 발명에 따른 에어로겔(17)은 분말 또는 비드 형태의 입자이고, 소수성으로 표면처리된 에어로겔이 사용될 수 있다. 소수성으로 표면처리한 경우에는 수분의 침투를 방지하여 내부에 균일한 기공을 형성할 수 있게 된다. 본 발명의 에어로겔은 물유리 혹은 알콕시 실란(alkoxy silane)을 원료로 제조된 것으로서, 실릴기(silyl groups)로 표면 소수화처리된 것을 사용할 수 있다.The airgel 17 according to the present invention is a particle in powder or bead form, and an airgel hydrophobically treated may be used. In the case of hydrophobic surface treatment, it is possible to form uniform pores inside the water by preventing penetration of moisture. The airgel of the present invention is made of water glass or alkoxy silane as a raw material, and may be one that is surface-hydrophobized with silyl groups.
실릴화제는 헥사메틸디실란, 에틸트리메톡시실란, 에틸트리에톡시실란, 트리에틸에톡시실란, 메틸트리메톡시실란, 에틸트리메톡시실란 및 트리메틸클로로실란 등을 예시할 수 있다. 상기와 같이 소수성 표면 처리한 에어로겔을 사용함으로써 장기간 사용하더라도 단열성능을 유지할 수 있게 되므로 냉장고 등 가전제품을 폐기할 때나 건물을 철거하는 경우에도 내부에 있는 단열재를 재활용할 수 있으며, 또한 냉장고의 제조과정에서 주로 사용되는 프레온가스를 사용하지 않으며, 건물의 연소시에도 유해가스의 발생이 적으므로 공해방지에도 효과적이다.Examples of the silylating agent include hexamethyldisilane, ethyltrimethoxysilane, ethyltriethoxysilane, triethylethoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, trimethylchlorosilane, and the like. By using a hydrophobic surface-treated airgel as described above, the thermal insulation performance can be maintained even if used for a long time, so even when disposing of household appliances such as a refrigerator or dismantling a building, the insulation inside can be recycled. It does not use freon gas, which is mainly used in the building, and it is effective in preventing pollution since there is less generation of harmful gases even when burning buildings.
본 발명에 따른 천연섬유시트(15)는 목화솜이나 면소재의 천연소재를 시트형태로 만들어 사용하는 것이 바람직하다. 목화솜은 자체로 많은 기공을 포함하고 있어 별도의 바인더나 니들펀치공정을 거치지 않더라도 분말상의 에어로겔을 담지 할 수 있기 때문이다. 또한 본 발명의 실시를 위해 친환경적인 천연섬유라면 목화솜 또는 면, 모(wool), 견(silk), 마(linen) 소재 등을 이용할 수 있다. Natural fiber sheet 15 according to the present invention is preferably used to make a natural material of cotton or cotton material in the form of a sheet. Cotton wool itself contains many pores, so it can carry a powdery airgel even without a separate binder or needle punching process. In addition, if the environment-friendly natural fiber for the practice of the present invention, cotton, cotton, wool, silk, linen material and the like can be used.
본 발명에 따른 에어로겔시트(13)는 천연섬유시트(15) 표면에 상기 에어로겔(17)이 스캐터링(scattering)되어 이루어질 수 있다.The airgel sheet 13 according to the present invention may be made by scattering the airgel 17 on the surface of the natural fiber sheet 15.
또한 본 발명에 따른 에어로겔시트(13)는 천연섬유시트(15)의 내부 기공에 에어로겔(17)이 담지되어 이루어질 수 있다.In addition, the airgel sheet 13 according to the present invention may be made by supporting the airgel 17 in the internal pores of the natural fiber sheet (15).
본 발명에 따른 에어로겔시트(13)의 형태는 천연섬유시트(15)의 종류 및 에어로겔(17) 입자의 크기에 따라 달라질 수 있다. The shape of the airgel sheet 13 according to the present invention may vary depending on the type of natural fiber sheet 15 and the size of the airgel 17 particles.
예를 들어, 도 1에 도시된 바와 같이 천연섬유시트(15)의 표면이 치밀한 구조로서 기공 내지 공간이 작거나, 에어로겔(17)의 입자직경이 1mm이상으로 큰 경우에는 천연섬유(15)와 상기 에어로겔(17)이 층을 이루는 형태가 될 수 있다. 천연섬유시트(15) 표면에 에어로겔(17)을 스캐터링(scattering)하는 공정은 분말 또는 비드 상태의 에어로겔(17)을 뿌리는 것으로서 천연섬유시트(15) 자체의 교락된 섬유에 의해 별도의 접착제나 바인더를 사용하지 않을 수 있다.For example, as shown in FIG. 1, when the surface of the natural fiber sheet 15 is dense and the pores or the space is small, or the particle diameter of the aerogel 17 is larger than 1 mm, the natural fiber 15 and The airgel 17 may be in the form of a layer. The process of scattering the airgel 17 on the surface of the natural fiber sheet 15 is to spray the airgel 17 in the form of powder or bead, and to separate adhesive by the interlaced fibers of the natural fiber sheet 15 itself. You can not use a binder.
그리고, 도 2에 도시된 바와 같이 천연섬유시트(15)가 성근 구조를 가지는 목화솜으로 이루어진 경우에는 입자직경이 1mm 미만인 에어로겔(17)을 천연섬유시트(15) 내부에 담지 시킬 수도 있다. In addition, as shown in FIG. 2, when the natural fiber sheet 15 is made of cotton wool having a sexual root structure, the aerogel 17 having a particle diameter of less than 1 mm may be supported in the natural fiber sheet 15.
한편, 천연섬유시트(15)와 에어로겔(17) 간의 강한 결합을 확보하기 위해 바인더나 접착제를 사용할 수도 있다.Meanwhile, a binder or an adhesive may be used to secure a strong bond between the natural fiber sheet 15 and the airgel 17.
본 발명에 따른 무기 바인더는 워터 글래스, 알루미늄킬레이트, 코로이달실리카, 알루미나졸 및 붕산 중에서 적어도 하나 선택될 수 있다.The inorganic binder according to the present invention may be selected from at least one of water glass, aluminum chelate, coroidal silica, alumina sol and boric acid.
본 발명에 따른 외피재(20)는 알루미늄 박막(23)의 외부면과 내부면에 수지(resin)를 코팅한 것이다. The envelope 20 according to the present invention is a coating of resin on the outer and inner surfaces of the aluminum thin film 23.
알루미늄 박막(23)의 외부면에는 외부충격에 견딜 수 있는 폴리에스테르 수지 또는 에틸렌 비닐 알콜(EVOH) 등을 코팅할 수 있다. 그리고 알루미늄 박막(23)의 내부면에는 열융착이 용이한 폴리에틸렌 수지, 폴리프로필렌 수지 및 폴리아크릴니트릴 등을 코팅할 수 있다.The outer surface of the aluminum thin film 23 may be coated with a polyester resin or ethylene vinyl alcohol (EVOH) that can withstand the external impact. The inner surface of the aluminum thin film 23 may be coated with polyethylene resin, polypropylene resin, polyacrylonitrile, and the like, which are easily heat-sealed.
도 3은 본 발명에 따른 진공 단열 패널의 제조방법에서 충진재를 외피재에 삽입하는 모습을 나타낸 부분 개략도이고, 도 4는 본 발명에 따른 진공 단열 패널의 제조방법에서 외피재의 개구부가 열융착 롤에 의하여 밀봉되는 모습을 나타낸 부분 개략도이다. 3 is a partial schematic view showing a state in which the filler is inserted into the outer shell material in the manufacturing method of the vacuum insulation panel according to the present invention, Figure 4 is an opening of the outer shell material in the manufacturing method of the vacuum insulation panel according to the present invention in the heat-sealed roll It is a partial schematic diagram which showed the state sealed by.
도 3 및 도 4에 도시된 바와 같이 본 발명의 진공 단열 패널(30)은 알루미늄 박막(23)의 내외부면에 수지를 코팅하여 외피재(20)를 제조하는 단계와; 천연섬유시트(15)의 표면에 에어로겔(17)을 스캐터링하거나 또는 천연섬유시트 내부에 에어로겔을 담지시켜 에어로겔시트(13)를 제조하는 단계; 에어로겔시트(13) 다수를 적층하여 충진재(10)를 제조하는 단계; 및 외피재(20)를 몰드에 장착하고 충진재(10)를 상기 외피재(20)의 내공간부(29)에 충진하며 10-4 Torr ~10-6 Torr의 진공도로 감압 진공한 상태에서 외피재(20)의 개구부(27)를 120~250℃로 열융착시키는 단계;를 포함하여 제조되는 것이다.3 and 4, the vacuum insulation panel 30 of the present invention comprises the steps of manufacturing an outer shell material 20 by coating a resin on the inner and outer surfaces of the aluminum thin film 23; Preparing an airgel sheet 13 by scattering the airgel 17 on the surface of the natural fiber sheet 15 or supporting the airgel inside the natural fiber sheet; Manufacturing a filler 10 by stacking a plurality of airgel sheets 13; And the envelope 20 in the mold and the filler 10 filled in the inner space 29 of the envelope 20 and under reduced pressure with a vacuum of 10 -4 Torr to 10 -6 Torr. It is prepared to include; heat-sealing the opening 27 of the 20 to 120 ~ 250 ℃.
본 발명에 따른 외피재(20)의 일측면에는 충진재(10)가 삽입될 수 있도록 개구부(27)가 형성되며 충진재(10)를 삽입한 후, 진공상태에서 상기 개구부(27)를 열융착하여 밀봉한다. 열융착공정은 알루미늄 박막의 내부면에 코팅된 외피재가 상호 열융착되는 것으로서 폴리에틸렌 수지, 폴리프로필렌 수지 및 폴리아크릴니트릴 등이 120~250℃의 온도범위에서 가열된 열융착 롤에 의하여 접착, 밀봉된다. Openings 27 are formed on one side of the outer cover material 20 according to the present invention so that the filler 10 can be inserted therein, and then the fillers 10 are inserted, and the openings 27 are heat-sealed in a vacuum state. Seal. In the heat fusion process, the outer coating material coated on the inner surface of the aluminum thin film is thermally fused to each other, and polyethylene resin, polypropylene resin, and polyacrylonitrile are bonded and sealed by a heat fusion roll heated at a temperature range of 120 to 250 ° C. .
또한, 알루미늄 박막(23)의 내부면 또는 외부면에는 별도의 접착성 수지를 더 코팅하여 외피재(20)를 더욱 간편하고 효율적으로 접착, 밀봉할 수 있다.In addition, by coating an additional adhesive resin on the inner surface or the outer surface of the aluminum thin film 23, the outer cover material 20 can be more easily and efficiently bonded and sealed.
본 발명에 따른 내공간부(29)는 감압하여 밀봉한 진공상태이고, 진공도의 범위는 10-4 Torr ~10-6 Torr인 것이 바람직하다. 진공상태란 공기가 없는 상태이므로 공기를 통한 전도나 대류열전달이 일어나지 않아 열 이동을 차단하는 단열재로서의 역할을 하게 된다. The inner space portion 29 according to the present invention is a vacuum state sealed under reduced pressure, and the vacuum degree is preferably in the range of 10 −4 Torr to 10 −6 Torr. Since the vacuum state is the absence of air, conduction through air or convection heat transfer does not occur, and thus serves as a heat insulating material to block heat transfer.
이상에서 설명된 본 발명은 예시적인 것에 불과하며, 본 발명이 속한 기술분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 잘 알 수 있을 것이다. 그러므로 본 발명은 상기의 상세한 설명에서 언급되는 형태로만 한정되는 것은 아님을 잘 이해할 수 있을 것이다. 따라서 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의해 정해져야 할 것이다. 또한, 본 발명은 첨부된 청구범위에 의해 정의되는 본 발명의 정신과 그 범위 내에 있는 모든 변형물과 균등물 및 대체물을 포함하는 것으로 이해되어야 한다.The present invention described above is merely illustrative, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.
<부호의 설명><Description of the code>
10 : 충진재 13 : 에어로겔시트10: filler 13: airgel sheet
15 : 천연섬유시트 17 : 에어로겔15: natural fiber sheet 17: aerogel
20 : 외피재 23 : 알루미늄 박막20: outer material 23: aluminum thin film
27 : 개구부 29 : 내공간부27: opening 29: inner space
30 : 진공 단열 패널 40 : 열융착 롤 30: vacuum insulation panel 40: heat fusion roll

Claims (5)

  1. 천연섬유시트의 표면 또는 내부에 에어로겔을 갖는 에어로겔시트;An airgel sheet having an airgel on or inside the natural fiber sheet;
    상기 에어로겔시트가 다수 적층된 충진재; 및Filler in which a plurality of airgel sheets are laminated; And
    상기 충진재를 둘러싸도록 내공간부를 형성하는 알루미늄 박막의 내외부면에 수지가 코팅된 외피재를 포함하되, It includes a shell material coated with a resin on the inner and outer surfaces of the aluminum thin film to form the inner space portion to surround the filler,
    상기 내공간부는 진공인 것을 특징으로 하는 진공 단열 패널.The inner space portion is a vacuum insulation panel, characterized in that the vacuum.
  2. 제1항에 있어서,The method of claim 1,
    상기 에어로겔시트는 상기 천연섬유시트 표면에 상기 에어로겔이 스캐터링되어 이루어지는 것을 특징으로 하는 진공 단열 패널.The airgel sheet is a vacuum insulation panel, characterized in that the airgel is scattered on the surface of the natural fiber sheet.
  3. 제1항에 있어서,The method of claim 1,
    상기 에어로겔시트는 상기 천연섬유시트의 내부 기공에 에어로겔이 담지되어 이루어지는 것을 특징으로 하는 진공 단열 패널.The airgel sheet is a vacuum insulation panel, characterized in that the airgel is carried in the inner pores of the natural fiber sheet.
  4. 제1항 내지 제3항 중 어느 하나의 항에 있어서,The method according to any one of claims 1 to 3,
    상기 천연섬유시트와 상기 에어로겔이 무기 바인더로 결합되되,The natural fiber sheet and the airgel is combined with an inorganic binder,
    상기 무기 바인더는 워터 글래스, 알루미늄킬레이트, 코로이달실리카, 알루미나졸 및 붕산 중에서 적어도 하나 선택되는 것을 특징으로 하는 진공 단열 패널.The inorganic binder is a vacuum insulation panel, characterized in that at least one selected from water glass, aluminum chelate, coroidal silica, alumina sol and boric acid.
  5. 알루미늄 박막의 내외부면에 수지를 코팅하여 외피재를 제조하는 단계;Manufacturing an outer shell material by coating a resin on an inner and outer surface of the aluminum thin film;
    천연섬유시트의 표면에 에어로겔을 스캐터링하거나 또는 천연섬유시트 내부에 에어로겔을 담지시켜 에어로겔시트를 제조하는 단계;Preparing an airgel sheet by scattering the airgel on the surface of the natural fiber sheet or supporting the airgel inside the natural fiber sheet;
    상기 에어로겔시트 다수를 적층하여 충진재를 제조하는 단계; 및Manufacturing a filler by laminating a plurality of airgel sheets; And
    상기 외피재를 몰드에 장착하고 상기 충진재를 상기 외피재의 내공간부에 충진하며 10-4 Torr ~10-6 Torr의 진공도로 감압 진공한 상태에서 상기 외피재의 개구부를 120~250℃로 열융착시키는 단계;Mounting the envelope to a mold, filling the filler into the inner space of the envelope, and thermally sealing the opening of the envelope to 120 to 250 ° C. under reduced pressure with a vacuum of 10 −4 Torr to 10 −6 Torr ;
    를 포함하는 것을 특징으로 하는 진공 단열 패널의 제조방법.Method for producing a vacuum insulation panel comprising a.
PCT/KR2011/001952 2010-06-04 2011-03-22 Vacuum insulation panel, and preparation method thereof WO2011152610A1 (en)

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