CN104628239A - Method for preparing vacuum insulated panel (VIP) core material by using dry process - Google Patents

Method for preparing vacuum insulated panel (VIP) core material by using dry process Download PDF

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Publication number
CN104628239A
CN104628239A CN201510082749.XA CN201510082749A CN104628239A CN 104628239 A CN104628239 A CN 104628239A CN 201510082749 A CN201510082749 A CN 201510082749A CN 104628239 A CN104628239 A CN 104628239A
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CN
China
Prior art keywords
core
dry
glass
glass fibre
heat insulation
Prior art date
Application number
CN201510082749.XA
Other languages
Chinese (zh)
Inventor
郭茂
秦大江
Original Assignee
宣汉正原微玻纤有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宣汉正原微玻纤有限公司 filed Critical 宣汉正原微玻纤有限公司
Priority to CN201510082749.XA priority Critical patent/CN104628239A/en
Publication of CN104628239A publication Critical patent/CN104628239A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00Other methods of shaping glass
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01Manufacture of glass fibres or filaments
    • C03B37/04Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C13/00Fibre or filament compositions

Abstract

The invention discloses a method for preparing a vacuum insulated panel (VIP) core material by using a dry process. The method comprises the steps of firstly, preparing and collecting glass fibers; then, primarily paving and molding the collected glass fibers; and finally, heating the primarily paved and molded core material to 550-600 DEG C, and preserving the heat for 2-5 minutes to obtain the VIP core material, wherein the primarily paved and molded core material is stressed by ambient pressure in the heat insulation process, and the ambient pressure is 0.2-0.4MPa. According to the method, the glass fibers are heated to a certain temperature, a proper pressure is applied and is maintained for a period of time, then, a semi-molten compound which is similar to silica gel is formed on the surface of the glass fibers, the semi-molten compound enables the glass fibers to be crosslinked and overlapped with each other, and finally, the novel VIP core material with high strength and low thermal conductivity is obtained through cooling.

Description

The method of dry process core material of vacuum heat insulation plate
Technical field
The invention belongs to adiabatic heat-insulation field, relate to a kind of fibrous glass insulation core, particularly a kind of method of dry process core material of vacuum heat insulation plate.
Background technology
Vacuum heat-insulating plate (being called for short VIP) is a kind of novel heat-insulation material, have that thermal conductivity is low, adiabatic heat insulating effect good, shared space proportion is little, there is the multiple advantages such as energy-conservation, low-carbon (LC), environmental protection, safety, be widely used in the fields such as aerospace.Along with the fast development of space flight and aviation industry, its space environment faced is more severe complicated, and this just has higher requirement to the heat-insulating property of aerospace core material of vacuum heat insulation plate, weight and volume.
Heat-insulating property and its preparation technology of fiberglass vacuum insulation panel core are closely related, application number be 201310213164.8 patent application document disclose a kind of adopt wet moulding to prepare method that glass fibre is core material of vacuum heat insulation plate, glass microfiber through slurrying dispersion, dehydrate and obtain required core.But the core thickness of wet moulding is usually between 1 ~ 2mm, and thermal conductivity is 2.1 ~ 2.3mW/ (mK), can not meet service requirements.In addition, it is large also to there is energy dissipation in wet moulding, the shortcoming that comprehensive production cost is high, is therefore necessary to develop a kind of novel process preparing fiberglass vacuum insulation panel core.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method of dry process core material of vacuum heat insulation plate.
For achieving the above object, the invention provides following technical scheme:
The method of dry process core material of vacuum heat insulation plate, first prepares and collects glass fibre, then tentatively mats formation shaping to the glass fibre collected, finally heats shaping core of tentatively mating formation to 550-600 DEG C, and namely insulation 2-5min obtains core material of vacuum heat insulation plate.
As preferably of the present invention, in heating and thermal insulation process, shaping core of tentatively mating formation is subject to the effect of ambient pressure, and this ambient pressure size is 0.2-0.4MPa.
Preferred as another kind of the present invention, described glass fibre is made up of following composition by mass, SiO 2: 58-70 part; Al 2o 3: 4.5-6 part; CaO:1-6 part; MgO:1-2 part; K 2o:0.5-1.5 part; Na 2o:9-15 part; B 2o 3: 5-13 part, BaO:0-5 part; ZnO:0-4 part, its diameter is 2-4um, and length is 3-6mm.
As present invention further optimization, described glass fibre adopts the method for centrifugal blast to obtain, first melt starting material and obtain glass metal, then glass metal is added sedimentator and high speed rotating, described glass metal throws away from sedimentator sidewall aperture and forms glass thread, finally obtains glass fibre with the cooling of flame stretching glass thread.
As present invention further optimization, the starting material preparing described glass fibre are borax, white sand, soda ash, potassium felspar sand, rhombspar, albite, calcite and fluorite.
Beneficial effect of the present invention is:
The present invention adopts dry-press process to prepare glass fibre VIP core, glass fibre is heated to certain temperature, applies suitable pressure and after maintaining for some time, fiberglass surfacing forms the compound of the class silica gel of half melt, this partly melts state compound and glass fiber is cross-linked with each other overlap joint (whole process is without the need to outer adding additives), final cooling obtains the novel VIP core with high strength, low heat conductivity, after tested, the thermal conductivity of the VIP core adopting the method to obtain is about 1.9mW/ (mK), far below wet method product.
Embodiment
To be described in detail the preferred embodiments of the present invention below.
Embodiment 1:
The present embodiment prepares the method for core material of vacuum heat insulation plate, comprises the following steps:
1, prepare glass fibre, specifically comprise:
1) a certain amount of borax, white sand, soda ash, potassium felspar sand, rhombspar, albite, calcite and fluorite is got;
2) by step 1) selected glass fibre adds mixing of kiln and heating and melting forms glass metal;
3) by step 2) glass melt introduce sedimentator high speed rotating, glass melt is thrown away from sedimentator sidewall aperture, forms glass thread;
4) by flame traction stretching step 3) glass thread, reach after certain length and cut off obtained glass fibre;
2, tentatively to mat formation shaping VIP core: with air draft system, glass fibre is sent into spreading machine and tentatively mat formation shaping;
3, dry-press process:
First shaping core of tentatively mating formation is transported on dry-press process device, then the glass fibre on former is heated to 580 DEG C, the upper forming net band pressure of dry-press process device is set to the pressure of 0.3MPa, and be incubated 3 minutes, now fiberglass surfacing produces semi-vitreous class silicone substance, and it is crosslinked that glass fiber filaments can be cross-linked overlap joint each other under the effect of this semi-melting silica gel; Finally cool and namely obtain described VIP core;
4, cutting encapsulates to obtain finished product automatically.
It should be noted that, in the present embodiment, the mean length of glass fibre is 4mm, and mean diameter is 2.6um, and its chemical composition is: SiO 2: 63 parts; Al 2o 3: 4.5 parts; CaO:2 part; MgO:2 part; K 2o:1.5 part; Na 2o:10 part; B 2o 3: 13 parts; BaO:2 part; ZnO:2 part.
After testing, the thermal conductivity of the present embodiment gained section bar is 1.85mW/ (mK), and thickness is 3mm, and intensity is 900N/m.
Embodiment 2:
The present embodiment prepares the method for core material of vacuum heat insulation plate, comprises the following steps:
1, prepare glass fibre, specifically comprise:
1) a certain amount of borax, white sand, soda ash, potassium felspar sand, rhombspar, albite, calcite and fluorite is got;
2) by step 1) selected glass fibre adds mixing of kiln and heating and melting forms glass metal;
3) by step 2) glass melt introduce sedimentator high speed rotating, glass melt is thrown away from sedimentator sidewall aperture, forms glass thread;
4) by flame traction stretching step 3) glass thread, reach after certain length and cut off obtained glass fibre;
2, tentatively to mat formation shaping VIP core: with air draft system, glass fibre is sent into spreading machine and tentatively mat formation shaping;
3, dry-press process:
First shaping core of tentatively mating formation is transported on dry-press process device, then the glass fibre on former is heated to 550 DEG C, the upper forming net band pressure of dry-press process device is set to the pressure of 0.25MPa, and be incubated 2.5 minutes, now fiberglass surfacing produces semi-vitreous class silicone substance, and it is crosslinked that glass fiber filaments can be cross-linked overlap joint each other under the effect of this semi-melting silica gel; Finally cool and namely obtain described VIP core;
4, cutting encapsulates to obtain finished product automatically.
It should be noted that, in the present embodiment, the mean length of glass fibre is 3mm, and mean diameter is 2.2um, and its chemical composition is: SiO 2: 67 parts; Al 2o 3: 4.5 parts; CaO:3 part; MgO:2 part; K 2o:1.5 part; Na 2o:15 part; B 2o 3: 7 parts.
After testing, the thermal conductivity of the present embodiment gained section bar is 1.8mW/ (mK), and thickness is 3mm, and intensity is 950N/m.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.

Claims (5)

1. the method for dry process core material of vacuum heat insulation plate, it is characterized in that: first prepare and collect glass fibre, then tentatively mat formation shaping to the glass fibre collected, finally heat shaping core of tentatively mating formation to 550-600 DEG C, namely insulation 2-5min obtains core material of vacuum heat insulation plate.
2. the method for dry process core material of vacuum heat insulation plate according to claim 1, it is characterized in that: in heating and thermal insulation process, shaping core of tentatively mating formation is subject to the effect of ambient pressure, and this ambient pressure size is 0.2-0.4MPa.
3. the method for dry process core material of vacuum heat insulation plate according to claim 1, is characterized in that: described glass fibre is made up of following composition by mass, SiO 2: 58-70 part; Al 2o 3: 4.5-6 part; CaO:1-6 part; MgO:1-2 part; K 2o:0.5-1.5 part; Na 2o:9-15 part; B 2o 3: 5-13 part, BaO:0-5 part; ZnO:0-4 part, its diameter is 2-4um, and length is 3-6mm.
4. the method for dry process core material of vacuum heat insulation plate according to claim 1, it is characterized in that: described glass fibre adopts the method for centrifugal blast to obtain, first melt starting material and obtain glass metal, then glass metal is added sedimentator and high speed rotating, described glass metal throws away from sedimentator sidewall aperture and forms glass thread, finally obtains glass fibre with the cooling of flame stretching glass thread.
5. the method for dry process core material of vacuum heat insulation plate according to claim 1, is characterized in that: the starting material preparing described glass fibre are borax, white sand, soda ash, potassium felspar sand, rhombspar, albite, calcite and fluorite.
CN201510082749.XA 2015-02-15 2015-02-15 Method for preparing vacuum insulated panel (VIP) core material by using dry process CN104628239A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106122686A (en) * 2016-08-31 2016-11-16 苏州维艾普新材料股份有限公司 A kind of vacuum heat insulation materials and core
CN107355640A (en) * 2017-07-19 2017-11-17 四川迈科隆真空新材料有限公司 The method and vacuum heat-insulating plate of core material of vacuum heat insulation plate are prepared using glass fibre aggregation leftover pieces
CN107366800A (en) * 2017-08-25 2017-11-21 四川迈科隆真空新材料有限公司 Preparation method of dry vacuum insulated panel core material and vacuum heat-insulating plate and products thereof
CN107953496A (en) * 2017-12-08 2018-04-24 刘军 A kind of core material of vacuum heat insulation plate and its preparation process
CN109024096A (en) * 2018-08-20 2018-12-18 海宁睿诚科技股份有限公司 Dry method needleless pierces fiberglass vacuum insulation panel core material preparation method and products thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103274603A (en) * 2013-05-31 2013-09-04 重庆再升科技股份有限公司 Novel glass fiber, glass fiber-based vacuum heat-insulating plate core material, and preparation method of core material
CN103542234A (en) * 2012-07-16 2014-01-29 苏州维艾普新材料有限公司 Dry method extra-fine glass wool vacuum insulated panel core material and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542234A (en) * 2012-07-16 2014-01-29 苏州维艾普新材料有限公司 Dry method extra-fine glass wool vacuum insulated panel core material and preparation method thereof
CN103274603A (en) * 2013-05-31 2013-09-04 重庆再升科技股份有限公司 Novel glass fiber, glass fiber-based vacuum heat-insulating plate core material, and preparation method of core material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106122686A (en) * 2016-08-31 2016-11-16 苏州维艾普新材料股份有限公司 A kind of vacuum heat insulation materials and core
CN107355640A (en) * 2017-07-19 2017-11-17 四川迈科隆真空新材料有限公司 The method and vacuum heat-insulating plate of core material of vacuum heat insulation plate are prepared using glass fibre aggregation leftover pieces
CN107366800A (en) * 2017-08-25 2017-11-21 四川迈科隆真空新材料有限公司 Preparation method of dry vacuum insulated panel core material and vacuum heat-insulating plate and products thereof
CN107953496A (en) * 2017-12-08 2018-04-24 刘军 A kind of core material of vacuum heat insulation plate and its preparation process
CN109024096A (en) * 2018-08-20 2018-12-18 海宁睿诚科技股份有限公司 Dry method needleless pierces fiberglass vacuum insulation panel core material preparation method and products thereof

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Application publication date: 20150520