CN102587516B - A kind of construction wall vacuum heat-insulating plate and its preparation method - Google Patents
A kind of construction wall vacuum heat-insulating plate and its preparation method Download PDFInfo
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- CN102587516B CN102587516B CN201210016641.7A CN201210016641A CN102587516B CN 102587516 B CN102587516 B CN 102587516B CN 201210016641 A CN201210016641 A CN 201210016641A CN 102587516 B CN102587516 B CN 102587516B
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- insulating plate
- vacuum heat
- construction wall
- core
- wall vacuum
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- 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
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- 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
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- Thermal Insulation (AREA)
Abstract
The present invention discloses a kind of construction wall vacuum heat-insulating plate and its preparation method, and this vacuum heat-insulating plate comprises the film material of adiabatic core and multilayered structure. Adiabatic core is by siliceous powder body material and chopped strand compound, and described siliceous powder body material is composited by two kinds of scale nanometer grade silicon dioxides. The specific surface area of two kinds of described scale nanometer grade silicon dioxides is between 10-400m2/ g, described chopped strand length is less than 10mm, and diameter is less than 20 μm. After being mixed by raw material, load compression moulding in mould, then take out after shaping core is dried to constant weight and put into by the previously prepared sack of film material, carry out heat-sealing under low pressure and obtain vacuum heat-insulating plate. Vacuum heat-insulating plate intensity is big, high insulating effect, cost are low, can be applicable to construction wall insulation.
Description
Technical field
The present invention relates generally to the preparation method of a kind of vacuum heat-insulating plate for construction wall insulation.
Background technology
Along with the fast development of economy and the raising of living standards of the people, people are also more and more higher to the demand of building. 21st century were the very big developing periods of energy expenditure, and the high energy consumption problem of building trade also highlights increasingly. 2010, the energy consumption that China's building uses accounted for the 28% of whole nation society terminal total energy consumption, predicts after 20 years, and the ratio that China's building energy consumption accounts for whole nation society total energy consumption will rise to 35%. The energy consumption of architectural environment depends primarily on the lagging material being used in building, GB50189-2005 specifies the roofing for bodily form coefficient 0.3 < bodily form coefficient≤0.4, its heat transfer coefficient≤0.30, for tradition lagging material, such as foamed concrete (λ=70mW/m K), its thickness to be reached more than 230mm. Therefore, the lagging material developing a kind of thermal conductivity lower is compeled at brows.
Under vacuum, any material all may produce special performance. Vacuum heat-insulating plate is a kind of a kind of high-efficiency insulated thermal insulation material utilizing vacuum environment to reduce gas heat-transfer, and its thermal conductivity is lower than 11.5mW/m K. Core is that the vacuum heat-insulating plate of aerosil has carried out studying and attempts being applied to building trade by IEA/ECBCSAnnex39 in 2005. But its core price high limits it is applied to domestic market. Chinese patent 200420053407.2 invention aerosil and glass fibre are complex as vacuum heat-insulating plate prepared by core, but the cost of aerosil is higher, should not be applied to construction wall. Chinese patent 201120061002.3 discloses metallic film and glass fibre central layer is applied to the vacuum heat-insulating plate of construction wall, but glass fibre is too high to vacuum level requirements, and service life also needs further research. This patent proposes the lower siliceous powder body material of use thermal conductivity and fibrous material compound, is prepared into adiabatic core by mould pressing process, then by the film material parcel of adiabatic core multilayered structure, carries out heat-sealing and obtain vacuum heat-insulating plate under low pressure. Timber intensity after Vacuum Package is big, high insulating effect, cost are low, can be applicable to construction wall insulation.
Summary of the invention
In order to solve the limitation of above-mentioned vacuum heat-insulating plate, the present invention discloses a kind of construction wall vacuum heat-insulating plate and its preparation method.
The technical scheme of the present invention: a kind of construction wall vacuum heat-insulating plate, comprise adiabatic core and the film material of the adiabatic core of parcel, adiabatic core is by siliceous powder body material and chopped strand compound, and described siliceous powder body material is composited by two kinds of scale nanometer grade silicon dioxides. The specific surface area of two kinds of described scale nanometer grade silicon dioxides is between 10-400m2/ g, described chopped strand length is less than 10mm, and diameter is less than 20 μm.
The described one in two kinds of scale nanometer grade silicon dioxides is aerosil, and another kind is silicon ash.
The specific surface area of described aerosil is 100-400m2/ g, loose bulk density is 40-60kg/m3, particle diameter is 7-40nm, and the specific surface area of described silicon ash is 10-20m2/ g, loose bulk density 200-300kg/m3, particle diameter is 100-225nm.
Described chopped strand is any one or several arbitrarily mixing in polypropylene fibre, glass fibre or vegetable fibre.
The film material of the described adiabatic core of parcel is any one in multi-layer polymer film, aluminium foil film or polymkeric substance and foil laminated film.
For easy construction, described film material outermost layer can coated layer of glass grid cloth.
Prepare the method for described vacuum heat-insulating plate, after being mixed by raw material, load compression moulding in mould, then take out and put into by the previously prepared sack of film material after shaping core is dried to constant weight, carry out heat-sealing under low pressure and obtain vacuum heat-insulating plate.
The load used in compression moulding process is 0.1～1MPa.
The load used in compression moulding process is preferably 0.3-0.5MPa.
Useful effect:
1. the aerosil adopted and silicon ash are all inorganic non-combustible materials. Wherein the thermal conductivity under the antivacuum state of aerosil is 20mW/m K, and thermal conductivity is low, and highest attainable vacuum pressure height is not too high to the requirement of vacuum tightness; The loose bulk density of wollastonite powder body is 200-300kg/m3, thermal conductivity is 40mW/m K, and thermal conductivity is low, and cost is low.
2. aerosil and silicon ash selected by are all nano materials, and the specific surface area of aerosil wherein is 100-400m2/ g, loose depos-its unit weight is 40-60kg/m3, particle diameter is 7-40nm, and this material water-absorbent is strong, and temperature is 23 DEG C, and humidity is 50%, and every kg of material can absorb water vapour up to 0.03kg; The specific surface area of silicon ash is 10-20m2/ g, loose bulk density is 200-300kg/m3, particle diameter is 100-225nm. The mean free path in the aperture and air molecule that are prepared into core after two kinds of nano materials are shaping is a magnitude, reduces the heat transfer of gas.
3. adopting compression molding, the unit weight of adiabatic core can obtain manually controlling well.
4. adopt fibrous material to be spiked in siliceous powder body material, it is possible to the effective intensity improving material, is conducive to the shaping of core.
5. the ultimate compression strength of the core prepared by can resist the pressure of a normal atmosphere and cost low, preparation technology is simple, saves manpower, is easy to automatic production.
Embodiment
A preparation technology for the novel vacuum heat-insulating plate for construction wall insulation, preparation process is:
The first step: by aerosil and wollastonite powder body material mixing, then by certain method, two kinds of powder body materials are mixed. Described aerosil specific surface area is 100-400m2/ g, loose depos-its unit weight is 40-60kg/m3, particle diameter is 7-40nm, and the specific surface area of silicon ash is 10-20m2/ g, loose bulk density is 200-300kg/m3, particle diameter is 100-225nm.
2nd step: the powder body material the first step mixed is mixed and added a certain amount of fibrous material, is evenly distributed in powder body material by cellulosic by certain technique. Described fiber is chopped strand, and its length is less than 10mm, and diameter is less than 20 μm. Described fiber can one or more in glass fibre, polypropylene fibre, vegetable fibre.
3rd step: the 2nd step Homogeneous phase mixing powder body is placed in previously prepared mould, working load carries out mould compression moulding, load size is between 0.1-1MPa, preferential selection 0.3-0.5MPa, prepares the tabular structure and having certain shape, can bear a barometric point.
4th step: core prepared by the 3rd step is dried process, and temperature is 100-300 DEG C, until core quality does not change, time of drying is determined along with drying temperature.
5th step: the sack that the adiabatic core of the 4th step is placed in the coated layer of glass grid cloth multilayered structure prepared by film material, carries out under low pressure sealing and obtains a kind of novel vacuum heat-insulating plate that can be applicable to construction wall insulation.
Embodiment 1
By aerosil and wollastonite powder body material mixing, then by certain method, two kinds of powder body materials are mixed. The specific surface area of the aerosil that the present embodiment is selected is 200m2/ g, loose depos-its unit weight is 50kg/m3, the specific surface area of silicon ash is 15m2/ g, loose bulk density is 248kg/m3, particle diameter is 100-225nm. The mass ratio of aerosil and silicon ash is 1: 1, the two is mixed, then chopped strand material is added, the fibrous material that this enforcement is selected is polypropylene fibre, its length is 7-8mm, aerosil: silicon ash: polypropylene fibre=10: 10: 1 (mass ratioes). The mixed powder of adding of fiber is stirred evenly, then the material mixed is put into previously prepared mould, carry out extrusion forming. The mould that the present embodiment is selected is 300mm × 300mm × 30mm, and the fully-factored load of pressurization is 0.4MPa, pressurize 2mm. Then being placed on by the core of preparation in the environment of temperature 105 DEG C dry 2 hours, the density measuring core is 270kg/m3. The core of oven dry is placed in previously prepared three edge sealings, while the plastic-aluminum combined sack of the coated layer of glass grid cloth multilayered structure can put into for core, when the low vacuum of vacuum chamber is in 1Pa, carry out inner pressure relief sealing, obtain the vacuum heat-insulating plate of our required preparation. The thermal conductivity adopting two plate method test vacuum heat-insulating plate is 8.6mW/m K (hot plate design temperature is 35 DEG C, and cold drawing design temperature is 15 DEG C).
Embodiment 2
By aerosil and wollastonite powder body material mixing, then by certain method, two kinds of powder body materials are mixed. The specific surface area of the aerosil that the present embodiment is selected is 380m2/ g, loose depos-its unit weight is 40kg/m3, particle diameter is 7-40nm, and the specific surface area of silicon ash is 15m2/ g, loose bulk density is 248kg/m3, particle diameter is 100-225nm. The mass ratio of aerosil and silicon ash is 1: 1.5, the two being mixed, then add chopped strand material, the fibrous material that this enforcement is selected is glass fibre, its length is 7-8mm, aerosil: silicon ash: glass fibre=10: 15: 1 (mass ratioes). Adopting embodiment 1 mode, the fully-factored load of pressurization is 0.5MPa, pressurize 3mm. Then being placed on by the core of preparation in the environment of temperature 105 DEG C dry 2 hours, the density measuring core is 320kg/m3.The core of oven dry is placed in previously prepared three edge sealings, while the coated layer of glass grid cloth that can put into for core, in the sack being composited by aluminium, PET and LLDPE, when the low vacuum of vacuum chamber is in 0.1Pa, carry out inner pressure relief sealing, obtain the vacuum heat-insulating plate of our required preparation. The thermal conductivity adopting two plate method test vacuum heat-insulating plate is 9.0mW/m K (hot plate design temperature is 35 DEG C, and cold drawing design temperature is 15 DEG C).
Embodiment 3
By aerosil and wollastonite powder body material mixing, then by certain method, two kinds of powder body materials are mixed. The specific surface area of the aerosil that the present embodiment is selected is 200m2/ g, loose depos-its unit weight is 50kg/m3, the specific surface area of silicon ash is 15m2/ g, loose bulk density is 248kg/m3, particle diameter is 100-225nm. The mass ratio of aerosil and silicon ash is 1: 2, the two is mixed, then adding chopped strand material, the fibrous material that this enforcement is selected is polypropylene fibre and lignocellulose, aerosil: silicon ash: wood fibre=10: 20: 1 (mass ratioes). Adopting embodiment 1 mode, the fully-factored load of pressurization is 0.55MPa, pressurize 5min. Then being placed on by the core of preparation in the environment of temperature 105 DEG C dry 2 hours, the density measuring core is 340kg/m3. The core of oven dry is placed in previously prepared three edge sealings, while the sack of the coated layer of glass grid cloth multilayered structure can put into for core, when the low vacuum of vacuum chamber is in 0.07Pa, carry out inner pressure relief sealing, obtain the vacuum heat-insulating plate of our required preparation. The thermal conductivity adopting two plate method test vacuum heat-insulating plate is 9.8mW/m K (hot plate design temperature is 35 DEG C, and cold drawing design temperature is 15 DEG C).
Above-mentioned concrete enforcement is not limiting the scope of the present invention, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or retrofit and be the equivalent embodiment of equivalent variations. To the change of addition ratio of the present invention and the change of the load of extrusion forming, it it is all the duplication to the present invention. Inventive concept according to the present invention, embodiment can do respective change.
Claims (7)
1. a construction wall vacuum heat-insulating plate, comprise adiabatic core and the film material of the adiabatic core of parcel, it is characterized in that, adiabatic core is by siliceous powder body material and chopped strand compound, described siliceous powder body material is composited by two kinds of scale nanometer grade silicon dioxides, and the specific surface area of two kinds of described scale nanometer grade silicon dioxides is between 10-400m2/ g, described chopped strand length is less than 10mm, and diameter is less than 20 μm; The described one in two kinds of scale nanometer grade silicon dioxides is aerosil, and another kind is silicon ash;
The specific surface area of described aerosil is 100-400m2/ g, loose bulk density is 40-60kg/m3, particle diameter is 7-40nm, and the specific surface area of described silicon ash is 10-20m2/ g, loose bulk density 200-300kg/m3, particle diameter is 100-225nm.
2. construction wall vacuum heat-insulating plate as claimed in claim 1, it is characterised in that, described chopped strand is any one or several arbitrarily mixing in polypropylene fibre, glass fibre or vegetable fibre.
3. construction wall vacuum heat-insulating plate as claimed in claim 1, it is characterised in that, the film material of the adiabatic core of described parcel is that multi-layer polymer film and aluminium film are composited.
4. construction wall vacuum heat-insulating plate as claimed in claim 1, it is characterised in that, the described coated layer of glass grid cloth of film material outermost layer.
5. prepare the method for the arbitrary described construction wall vacuum heat-insulating plate of claim 1 ~ 4, it is characterized in that, compression moulding in mould is loaded after being mixed by raw material, then taking out puts into by the previously prepared sack of film material after shaping core is dried to constant weight, carries out heat-sealing and obtain vacuum heat-insulating plate under low pressure.
6. prepare the method for construction wall vacuum heat-insulating plate as claimed in claim 5, it is characterised in that, the load used during compression moulding is 0.1 ~ 1MPa.
7. prepare the method for construction wall vacuum heat-insulating plate as claimed in claim 6, it is characterised in that, the load used during compression moulding is 0.3-0.5MPa.
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| CN201210016641.7A CN102587516B (en) | 2012-01-19 | 2012-01-19 | A kind of construction wall vacuum heat-insulating plate and its preparation method |
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| CN201210016641.7A CN102587516B (en) | 2012-01-19 | 2012-01-19 | A kind of construction wall vacuum heat-insulating plate and its preparation method |
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| CN102587516A CN102587516A (en) | 2012-07-18 |
| CN102587516B true CN102587516B (en) | 2016-06-15 |
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| CN103628580A (en) * | 2012-08-23 | 2014-03-12 | 陕西亿丰绿色建筑材料有限公司 | Production technology of vacuum thermal insulation board with five level of heat conduction resistance capacity |
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| CN111229078A (en) * | 2020-03-13 | 2020-06-05 | 南通福美新材料有限公司 | Production process of vacuum heat insulation plate core material |
| CN111559902B (en) * | 2020-05-18 | 2022-01-07 | 江南大学 | Multi-component mixed VIP core material and preparation method thereof |
| CN114311907A (en) * | 2021-12-29 | 2022-04-12 | 吉林建筑大学 | Vacuum heat-insulating plate and preparation method thereof |
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