CN107012591A - Dry laminating vacuum insulation core material and preparation method thereof - Google Patents
Dry laminating vacuum insulation core material and preparation method thereof Download PDFInfo
- Publication number
- CN107012591A CN107012591A CN201710224522.3A CN201710224522A CN107012591A CN 107012591 A CN107012591 A CN 107012591A CN 201710224522 A CN201710224522 A CN 201710224522A CN 107012591 A CN107012591 A CN 107012591A
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- Prior art keywords
- vacuum insulation
- dry laminating
- core material
- insulation core
- ultra
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/002—Inorganic yarns or filaments
- D04H3/004—Glass yarns or filaments
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
Abstract
The present invention relates to dry laminating vacuum insulation core material, by mass percentage, including 1~5wt% of ultra-fine fibre glass 70~80wt% of cotton, 15~25wt% of nanometer grade silica powder and processing aid；The nanometer grade silica diameier is 50~100nm；Na in the ultra-fine fibre glass cotton2O and K2O total content is controlled in 11~17wt%.The invention further relates to the preparation method of dry laminating vacuum insulation core material, ultra-fine fibre glass cotton and nanometer grade silica powder are combined together, vacuum insulation core material is prepared using dry method hot pressing, thermal conductivity factor is low, intensity is high, life-span increase.
Description
Technical field
The invention belongs to functional composite material technical field, it is related to dry laminating vacuum insulation core material and preparation method thereof.
Background technology
Vacuum heat-insulating plate (Vacuum Insulation Panel:VIP) it is thermal insulation material of new generation, thermal conductivity coefficient
Can as little as 2.0mW/ (mK) below, equivalent to the 1/10 of traditional material thermal conductivity factor, be at present in the world thermal conductivity factor it is minimum
Heat preserving and insulating material.VIP is widely used in refrigerator, refrigerator-freezer, refrigerating box, freezer, construction wall insulation, naval vessels, ship, vapour
The fields such as car, electric heater.
Core is as part most crucial vacuum heat-insulating plate VIP, and itself is made up of porous material, limits residual aqueous vapor
The free movement of molecule, and prevent convection current and the heat transfer of gas.In vacuum encapsulation process, the core of support frame is used as
The pressure more than 98KPa can be born, it is ensured that Obstruct membrane is with core good fit without caving in.For what is made with fibrous material
Vacuum heat-insulating plate VIP cores, the aperture size of core is collided with each other by molecule and caused closer to gas molecule mean free path
Gas heat transfer just it is smaller, so the factor such as porosity, fibre diameter and aperture size has together decided on vacuum heat-insulating plate VIP
Thermal conductivity factor.With the extension of use time, the gas adsorbed in core can be discharged, interior in vacuum heat-insulating plate VIP
Pressure can increase to a certain extent, and interior pressure increases with thermal conductivity factor to have a great impact.For being made with silica
Vacuum heat-insulating plate VIP cores, because it has nano-pore structure feature, the conduction heat transfer of gas can be reduced.
Publication No. CN104747862 has glass fibre sheet and gas phase SiO2It is open in the patent of the VIP cores of layer
The middle core that multilayer laminated glass fibre sheet is constituted, the upper surface and/or lower surface of middle core be covered with gas phase
SiO2Plate, or the periphery of the middle core are coated with gas phase SiO2Bisque.
In the patent of the method for Publication No. CN104628239 dry process core material of vacuum heat insulation plate, disclose a kind of dry
The method that method prepares core material of vacuum heat insulation plate.Prepare first and collect glass fibre, glass fibre is heated to certain temperature, applied
Plus appropriate pressure and the compound for maintaining the class silica gel of half melt of fiberglass surfacing formation after a period of time, this partly melts state
Compound causes glass fiber to be cross-linked with each other, and finally cooling obtains VIP cores to overlap joint.
It is open in a kind of patent of glass cores of flyash doping of Publication No. CN104291772 and preparation method thereof
It is made using wet processing in blanket of glass wool, drying process in its surface even application silane coupler, after after its solidification,
A vibration powder filling machine is placed above glass core, fly ash grain is placed wherein, fly ash grain is evenly distributed on core
In the hole of material fiber.
In above-mentioned three patent of invention, disclosed vacuum heat-insulating plate VIP cores be sheet fiberglass lamella core with
Powder lamella core laying is composited, or individually fiberglass plies core or independent powder lamella core composition；Wherein institute
The fiberglass plies core stated is prepared from using wet method mashing mode, compared to dry method thermoforming way, wet method
Pulping process can destroy fiber, and complex forming technology, energy consumption cost is higher；For powder lamella core difficult forming, intensity compared with
Difference, it is just increasingly difficult especially for nano-scale particle powder compacting, core in vacuum can be caused to deform, surface is recessed
Convex not gentle thermal conductivity factor increase.Therefore, the composite core material of dry method hot pressing glass fibre and nanometer grade powder how is prepared,
It is to prepare ultra-low thermal conductivity vacuum heat-insulating plate VIP urgent problems to be solved.
The content of the invention
In view of this, it is an object of the invention to provide a kind of surfacing, intensity is high and the low dry method of thermal conductivity factor is answered
Vacuum insulation core material is closed, the preparation method of the dry laminating vacuum insulation core material is also provided.
To reach above-mentioned purpose, the present invention provides following technical scheme：
1st, dry laminating vacuum insulation core material, by mass percentage, including following component：Ultra-fine fibre glass cotton 70~
1~5wt% of 80wt%, 15~25wt% of nanometer grade silica powder and processing aid；The ultra-fine fibre glass cotton presses matter
Percentages are measured, it is composed of the following components：SiO2：58.5~65wt%；Na2O：10.5~16wt%；K2O：0.5~3wt%；
Al2O3：2.4~7wt%；MgO：1~4.5wt%；CaO：3~7.5wt%；B2O3：6~8wt%；Fe2O3：0.05~
0.2wt%；ZnO：0~2wt%；BaO：0.5~3.5wt%.
Further, the nanometer grade silica diameier is 50~100nm.
Further, Na in the ultra-fine fibre glass cotton2O and K2O total content is controlled in 11~17wt%.
Further, the nanometer grade silica powder selects aerosil, precipitated silica or aeroge two
One or more in silica.
Further, the processing aid selects KH792, KH550, KH560 silane coupler, NDZ-101 or NDZ-311 titaniums
One or more in acid esters coupling agent.
2nd, the preparation method of dry laminating vacuum insulation core material, comprises the following steps：
(1) quartz sand, soda ash, potassium feldspar, albite, calcite, boron are chosen according to ultra-fine fibre glass cotton constituent
Sand, dolomite, barium carbonate and zinc oxide uniformly mix and are smelted into the transparent glass metal of free from admixture；
(2) glass metal throws away ultra-fine fibre glass by the centrifugal pan of high speed rotation；
(3) the nanometer grade silica powder uniform atomizing for being blended with processing aid is sprayed on ultra-fine fibre glass table
Face, formation dry laminating ultra-fine fibre glass cotton in cotton collecting machine is drawn onto by negative pressure induced wind；
(4) by obtained dry laminating ultra-fine fibre glass cotton through excess temperature for 550~650 DEG C curing oven hot pressing 3~
10min, obtains dry laminating vacuum insulation core material.
Further, the normal distribution of diameter 95% of the ultra-fine fibre glass is in 2.5~4 μm, the ultra-fine fibre glass
The normal distribution of length 90% in 15~30mm.
Further, the thickness control of step (4) the dry laminating vacuum insulation core material is in 15~35mm, and density domination exists
150~300Kg/m3。
Further, the injection Stress control that uniform atomizing is sprayed in step (3) is in 0.3~0.5Mpa, injection flow control
In 150~250Kg/h.
The beneficial effects of the present invention are：Ultra-fine fibre glass cotton chemical composition neutral and alkali metal Na of the present invention2O+
K2O content is controlled in 11~17wt%, can effectively improve the comprehensive mechanical property of fiber, reduces thermal conductivity factor；Superfine glass is fine
B in dimension2O3Content is 6~8wt%, can effectively reduce thermal conductivity factor；The all normal state point of ultra-fine fibre glass diameter 95% prepared
Cloth is at 2.5~4 μm, and all normal distributions of fibre length 90% are controlled in 15~35mm, density domination in 15~30mm, core thickness
In 150~300Kg/m3, can effectively reduce the thermal conductivity factor for preparing dry laminating vacuum insulation core material.The present invention is by heat conduction system
The low-down ultra-fine fibre glass cottons of number and nanometer grade silica powder are effectively combined together, and using dry method hot pressing come
Vacuum insulation core material is prepared, has broken destruction of traditional wet method mashing to fiber, the dry laminating vacuum insulation core prepared
Material service life is greatly increased, and is combined, is prepared by dry method hot pressing using nanometer grade silica and ultra-fine fibre glass cotton
Composite evacuated adiabatic core, the single material core standby compared to other dry method hot pressings, its thermal conductivity factor is lower, and intensity is high,
Life-span is longer；The core prepared is beaten compared to wet method, its preparation process does not destroy fiber, and moulding process is simple, energy consumption cost
It is low, while realizing effective addition of nano silicon.Put down on the dry laminating vacuum insulation core material surface that the present invention is prepared
Whole, intensity is high and thermal conductivity factor is low, be highly suitable for refrigerator, refrigerator-freezer, refrigerating box, freezer, construction wall insulation, naval vessels, ship,
The fields such as automobile, electric heater.
Embodiment
The preferred embodiments of the present invention will be described in detail below.
Embodiment 1
By weight choose 23.5 parts of quartz sands, 11 parts of soda ash, 4.5 parts of potassium feldspars, 5.5 albites, 2.5 parts of calcites,
Input kiln calcining, melts composition uniform after 8.5 boraxs, 6 dolomites, 1.5 parts of barium carbonates and 1 part of zinc oxide are uniformly mixed
The transparent glass metal of free from admixture；Then glass metal throws away ultra-fine fibre glass by the centrifugal pan of high speed rotation, and for preparing is super
The all normal distributions of thin glass fiber diameter 95% are at 2.5~3 μm, and all normal distributions of fibre length 90% are in 20~30mm；Will be mixed
The nano grade gas phase silicon dioxide powder uniform atomizing that closing has content 1%KH560 silane couplers is sprayed on ultra-fine fibre glass
The control of surface, wherein injection pressure is controlled in 200Kg/h in 0.4Mpa, injection flow；Then cotton collecting machine is drawn onto by negative pressure induced wind
Interior formation dry laminating ultra-fine fibre glass cotton；It is finally 600 through excess temperature by obtained dry laminating ultra-fine fibre glass cotton
DEG C solidification 8min；
Dry laminating vacuum insulation core material thickness 15mm, density 245Kg/m after testing3, core compression ratio 18% measures and leads
Hot coefficient is compared with other vacuum insulation core materials, and concrete outcome is as follows：
It can be seen that the thermal conductivity factor for the dry laminating vacuum insulation core material prepared will be less than single dry method glass
Glass fiber core and silica lamella fiberglass plies core, while being also less than wet glass fibers core.
Embodiment 2
By weight selection 26.5 parts of quartz sands, 12 parts of soda ash, 4 parts of potassium feldspars, 6 albites, 3 parts of calcites, 7.5 boron
Input kiln calcining, melts composition uniform without miscellaneous after sand, 6 dolomites, 2 parts of barium carbonates and 1.5 parts of zinc oxide are uniformly mixed
The transparent glass metal of matter；Then glass metal throws away ultra-fine fibre glass by the centrifugal pan of high speed rotation, the ultra-fine glass prepared
The all normal distributions of glass fibre diameter 95% are at 2.5~3 μm, and all normal distributions of fibre length 90% are in 15~25mm；It is blended with
The nanometer grade silica aerogel powder uniform atomizing of content 3%KH792 silane couplers is sprayed on ultra-fine fibre glass table
The control of face, wherein injection pressure is controlled in 250Kg/h in 0.5Mpa, injection flow；Then it is drawn onto by negative pressure induced wind in cotton collecting machine
Form dry laminating ultra-fine fibre glass cotton；It it is finally 630 DEG C through excess temperature by obtained dry laminating ultra-fine fibre glass cotton
Solidification 5min；
Dry laminating vacuum insulation core material thickness 17mm, density 255Kg/m after testing3, core compression ratio 20% measures and leads
Hot coefficient is compared with other vacuum insulation core materials, and concrete outcome is as follows：
It can be seen that the dry laminating vacuum insulation formed by nano silicon and ultra-fine fibre glass cotton hot pressing
The thermal conductivity factor of core will be less than single dry method glass fibre core, while being also less than wet glass fibers core.Prove
The dry laminating vacuum insulation core material that the present invention is prepared has cost low, the low feature of thermal conductivity factor.Therefore, in refrigerator, ice
The fields such as cabinet, refrigerating box, freezer, construction wall insulation have wide market prospects.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (9)
1. dry laminating vacuum insulation core material, it is characterised in that by mass percentage, including following component：Superfine glass is fine
1~5wt% of 70~80wt% of vinylon and cotton blend, 15~25wt% of nanometer grade silica powder and processing aid；The superfine glass is fine
Vinylon and cotton blend is by mass percentage, composed of the following components：SiO2：58.5~65wt%；Na2O：10.5~16wt%；K2O：0.5
~3wt%；Al2O3：2.4~7wt%；MgO：1~4.5wt%；CaO：3~7.5wt%；B2O3：6~8wt%；Fe2O3：0.05
~0.2wt%；ZnO：0~2wt%；BaO：0.5~3.5wt%.
2. dry laminating vacuum insulation core material as claimed in claim 1, it is characterised in that the nanometer grade silica powder
A diameter of 50~100nm.
3. dry laminating vacuum insulation core material as claimed in claim 1, it is characterised in that in the ultra-fine fibre glass cotton
Na2O and K2O total content is controlled in 11~17wt%.
4. dry laminating vacuum insulation core material as claimed in claim 1, it is characterised in that the nanometer grade silica powder
From the one or more in aerosil, precipitated silica or aeroge silica.
5. dry laminating vacuum insulation core material as claimed in claim 1, it is characterised in that the processing aid from KH792,
One or more in KH550, KH560 silane coupler, NDZ-101 or NDZ-311 titanate coupling agents.
6. the preparation method of any described dry laminating vacuum insulation core materials of claim 1-5, it is characterised in that including as follows
Step：
(1) quartz sand is chosen according to ultra-fine fibre glass cotton constituent, it is soda ash, potassium feldspar, albite, calcite, borax, white
Marble, barium carbonate and zinc oxide uniformly mix and are smelted into the transparent glass metal of free from admixture；
(2) glass metal throws away ultra-fine fibre glass by the centrifugal pan of high speed rotation；
(3) the nanometer grade silica powder uniform atomizing for being blended with processing aid is sprayed on ultra-fine fibre glass surface, leads to
Cross negative pressure induced wind and be drawn onto formation dry laminating ultra-fine fibre glass cotton in cotton collecting machine；
(4) by obtained dry laminating ultra-fine fibre glass cotton through excess temperature for 550~650 DEG C curing oven hot pressing 3~
10min, obtains dry laminating vacuum insulation core material.
7. the preparation method of dry laminating vacuum insulation core material as claimed in claim 6, it is characterised in that the superfine glass
The normal distribution of diameter 95% of fiber at 2.5~4 μm, the normal distribution of length 90% of the ultra-fine fibre glass 15~
30mm。
8. the preparation method of dry laminating vacuum insulation core material as claimed in claim 6, it is characterised in that step (4) is described
Dry laminating vacuum insulation core material thickness control is in 15~35mm, and density domination is in 150~300Kg/m3。
9. the preparation method of dry laminating vacuum insulation core material as claimed in claim 6, it is characterised in that in step (3)
The injection Stress control of even atomized spray is controlled in 150~250Kg/h in 0.3~0.5Mpa, injection flow.
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| CN201710224522.3A CN107012591B (en) | 2017-04-07 | 2017-04-07 | Dry laminating vacuum insulation core material and preparation method thereof |
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| CN201710224522.3A CN107012591B (en) | 2017-04-07 | 2017-04-07 | Dry laminating vacuum insulation core material and preparation method thereof |
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| CN107012591B CN107012591B (en) | 2019-07-23 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107512851A (en) * | 2017-08-31 | 2017-12-26 | 宣汉正原微玻纤有限公司 | A kind of high-specific surface area AGM dividing plates modified superfine glass fibre cotton and preparation method thereof |
| CN107558289A (en) * | 2017-09-20 | 2018-01-09 | 宣汉正原微玻纤有限公司 | A kind of high intensity low thermal conductivity ultra-fine fibre glass cotton dry method hot pressing core and preparation method thereof |
| CN107639920A (en) * | 2017-09-20 | 2018-01-30 | 宣汉正原微玻纤有限公司 | A kind of compound dry method hot pressing core material of vacuum heat insulation plate of low thermal conductivity and preparation method thereof |
| CN108101374A (en) * | 2017-12-08 | 2018-06-01 | 重庆纤维研究设计院股份有限公司 | A kind of environmentally friendly low thermal conductivity ultra-fine fibre glass spraying cotton particle for building and preparation method thereof |
| CN108468907A (en) * | 2018-04-20 | 2018-08-31 | 宿迁南航新材料与装备制造研究院有限公司 | A kind of vacuum heat-insulating plate and preparation method thereof of fiber reinforcement nano-powder material |
| CN109249507A (en) * | 2018-09-27 | 2019-01-22 | 佛山齐安建筑科技有限公司 | A kind of preparation method of core material of vacuum heat insulation plate |
| CN110159873A (en) * | 2019-06-06 | 2019-08-23 | 四川迈科隆真空新材料有限公司 | A kind of vacuum heat-insulating plate and preparation method thereof |
| CN110846927A (en) * | 2019-07-01 | 2020-02-28 | 重庆文理学院 | Hydrophobic oleophylic modified superfine glass fiber cotton for oil product purification filter membrane and preparation method thereof |
| CN110845145A (en) * | 2019-07-01 | 2020-02-28 | 重庆文理学院 | Composite heat-resistant material for automobile engine heat shield and preparation method thereof |
| CN111268995A (en) * | 2019-11-19 | 2020-06-12 | 重庆文理学院 | Honeycomb nano-pore structure composite heat insulation material and preparation method thereof |
| CN111268917A (en) * | 2019-11-19 | 2020-06-12 | 重庆文理学院 | Two-step primary nanopore dry-process composite vacuum heat-insulation core material and preparation method thereof |
| CN111893652A (en) * | 2019-05-05 | 2020-11-06 | 南京和润隆环保科技有限公司 | Preparation method of storage tank ceiling cold insulation glass cotton felt |
| CN112032475A (en) * | 2020-09-03 | 2020-12-04 | 盱眙润新材料技术服务中心 | Core material for dry-process vacuum insulation panel and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107512851A (en) * | 2017-08-31 | 2017-12-26 | 宣汉正原微玻纤有限公司 | A kind of high-specific surface area AGM dividing plates modified superfine glass fibre cotton and preparation method thereof |
| CN107558289A (en) * | 2017-09-20 | 2018-01-09 | 宣汉正原微玻纤有限公司 | A kind of high intensity low thermal conductivity ultra-fine fibre glass cotton dry method hot pressing core and preparation method thereof |
| CN107639920A (en) * | 2017-09-20 | 2018-01-30 | 宣汉正原微玻纤有限公司 | A kind of compound dry method hot pressing core material of vacuum heat insulation plate of low thermal conductivity and preparation method thereof |
| CN107558289B (en) * | 2017-09-20 | 2019-01-11 | 宣汉正原微玻纤有限公司 | A kind of high intensity low thermal conductivity ultra-fine fibre glass cotton dry method hot pressing core material and preparation method thereof |
| CN108101374A (en) * | 2017-12-08 | 2018-06-01 | 重庆纤维研究设计院股份有限公司 | A kind of environmentally friendly low thermal conductivity ultra-fine fibre glass spraying cotton particle for building and preparation method thereof |
| CN108468907A (en) * | 2018-04-20 | 2018-08-31 | 宿迁南航新材料与装备制造研究院有限公司 | A kind of vacuum heat-insulating plate and preparation method thereof of fiber reinforcement nano-powder material |
| CN109249507A (en) * | 2018-09-27 | 2019-01-22 | 佛山齐安建筑科技有限公司 | A kind of preparation method of core material of vacuum heat insulation plate |
| CN111893652A (en) * | 2019-05-05 | 2020-11-06 | 南京和润隆环保科技有限公司 | Preparation method of storage tank ceiling cold insulation glass cotton felt |
| CN110159873A (en) * | 2019-06-06 | 2019-08-23 | 四川迈科隆真空新材料有限公司 | A kind of vacuum heat-insulating plate and preparation method thereof |
| CN110846927A (en) * | 2019-07-01 | 2020-02-28 | 重庆文理学院 | Hydrophobic oleophylic modified superfine glass fiber cotton for oil product purification filter membrane and preparation method thereof |
| CN110845145A (en) * | 2019-07-01 | 2020-02-28 | 重庆文理学院 | Composite heat-resistant material for automobile engine heat shield and preparation method thereof |
| CN111268995A (en) * | 2019-11-19 | 2020-06-12 | 重庆文理学院 | Honeycomb nano-pore structure composite heat insulation material and preparation method thereof |
| CN111268917A (en) * | 2019-11-19 | 2020-06-12 | 重庆文理学院 | Two-step primary nanopore dry-process composite vacuum heat-insulation core material and preparation method thereof |
| CN112032475A (en) * | 2020-09-03 | 2020-12-04 | 盱眙润新材料技术服务中心 | Core material for dry-process vacuum insulation panel and preparation method thereof |
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| CN107012591B (en) | 2019-07-23 |
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