CN102807321A - Method for preparing core material for vacuum heat-insulation plate - Google Patents
Method for preparing core material for vacuum heat-insulation plate Download PDFInfo
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- CN102807321A CN102807321A CN 201110146913 CN201110146913A CN102807321A CN 102807321 A CN102807321 A CN 102807321A CN 201110146913 CN201110146913 CN 201110146913 CN 201110146913 A CN201110146913 A CN 201110146913A CN 102807321 A CN102807321 A CN 102807321A
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Abstract
The invention provides a method for preparing a core material for a vacuum heat-insulation plate. The core material is mainly made of extra-fine glass wool, is reshaped by a wet production process, then is subjected to thermal treatment and is pressed for a certain period. The heat conduction coefficient of the vacuum heat-insulation plate comprising the core material produced by the method is lower than that of an existing vacuum heat-insulation plate packaged by a core material without being heated or pressed by 10% to 20%.
Description
Technical field
The present invention relates to be used for the preparation method of the core of vacuum insulation panel.
Background technology
Vacuum insulation panel is called the VIP plate again, is usually used in space flight and aviation, household electrical appliances, aspects such as building.Its normal temperature thermal conductivity is below 0.0035 W/m.k.
Vacuum insulation panel is made up of core, sorbent material and packing bag.Core is heat insulation material of main part, and it accounts for more than 40% in the cost structure of VIP plate, we can say quality and the price of core decision VIP.At present, the geographic VIP in whole Asia adopts the beta glass fibre cotton as core, and its advantage is that cost is lower, is easy to industriallization, recyclable.The method for making of super glass wool core has two kinds, and first kind is to adopt the centrifuging dry production, and the cotton after centrifugal is used for the VIP encapsulation through adding viscose glue or hot pressed pattern moulding; Second kind is that flame method super glass wool or centrifuging glass wool or the two are used in combination or add mineral wool again and mix and use, and is used for the VIP encapsulation through making beating, slagging-off, dehydration, heating, drying, cutting aftershaping.First kind is called the dry type core, and second kind is called the wet type core.
At present, domestic production VIP all adopts the wet type core, and adopt the wet type core as the shortcoming of VIP core to be: 1, fibre array is respectively to unordered, and thermal conductivity is higher.2, the glass slag of arranging on the small amount of vertical direction that contains in the glass wool can puncture the vacuum seal pack when packaging V IP, damage the VIP plate.
The VIP Study on thermal insulation shows, is that fiber orientation is that horizontal direction is arranged if fibre array is a laminate structure, and no vertical direction is arranged, and then thermal conductivity will be lower than the situation that fiber has vertical direction to arrange under the equal material.Ordering difficulty at microcosmic adjusted fiber is too big, and the VIP core of making is not at present done any processing in ordering.
Remove for a small amount of glass slag that contains in the glass wool is when making beating removes the gred, to remove as far as possible, and residual a small amount of glass slag is not just done any processing, just directly scraps processing as substandard products if when packaging V IP, puncture the vacuum seal pack.
In order under the low-cost situation of trying one's best, to obtain the more VIP plate of low thermal conductivity, we improve core.The present invention considers from process aspect, and purpose is to add the more high-quality core of acquisition under the cost situation reducing as far as possible, makes product have better performance, overcomes two drawbacks recited above simultaneously.
Summary of the invention
The objective of the invention is to realize through following technical proposals:
1. the preparation of core
It is main raw material that raw material adopts super glass wool, and this raw material is that flame method super glass wool or centrifuging super glass wool or the two are used in combination or add mineral wool again and mix and use.Adopt wet process technique, raw material is passed through making beating, slagging-off, dehydration, heating, drying, is cut into VIP production specified dimension.
2. the thermal treatment of core
The core of well cutting placed under the high temperature heat-treat, and apply certain pressure, take out behind the certain hour and promptly can be used for the VIP encapsulation on the core surface.Its thermal treatment temp is specially 0～100 ℃ of the melt temperature point that is lower than core, exerts pressure to more than or equal to the cylinder roll extrusion of 5kg or more than or equal to 10kg/m
2Dull and stereotyped pressure, the time of exerting pressure is for more than or equal to 10 seconds.
3. adopt the vacuum insulation panel thermal conductivity low 10%～20% of the core of this method production than the core encapsulation of not heating and pressurizing processing.
This technical scheme was compared with former technical scheme; Increased the heating and pressurizing treatment process of core; But can be so that the fiber level direction arranging situation on core surface improves; And can the glass slag on a spot of vertical direction be changed into horizontal direction and arrange, reduce fraction defective, most critical be that the thermal conductivity of the VIP of encapsulation can descend 10% ~ 20%.
Its enforcement principle is that fiber begins deliquescing under the melting temperature cotton a little less than core, can the fiber that vertical direction is arranged be pressed to horizontal direction through pressing mode at this moment and arrange, and the glass slag pressure of same vertical direction is arranged for horizontal direction.Also for the fiber that the just direct pressurization of deliquescing then has can fracture, cause powder phenomenon-tion like fruit fiber, the VIP of its encapsulation of this atomizing core can have very big infringement and thermal conductivity also not to have the improvement situation to the vacuum machine.If the too high melting temperature that reaches of temperature, then fiber can produce melting phenomenon, and core has the situation of caving in, and has lost heat insulation function, and this core can't be used for VIP production.
Description of drawings
Fig. 1 is the core fibre array synoptic diagram of hot-pressing processing not among the present invention.
Fig. 2 is the core fibre array synoptic diagram after the hot-pressing processing among the present invention.
In Fig. 1 and Fig. 2, symbol 1 is represented ultra-fine fibre, and symbol 2 is represented the glass slag.
Below in conjunction with embodiment the present invention is carried out concrete description.Can know that by technological general knowledge the present invention can realize through other the embodiment that does not break away from its spirit or essential feature.Therefore, following embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change that is equal in the scope of the present invention all comprised by the present invention.
Embodiment:
Embodiment 1
1, select centrifugal cotton for use, the major ingredient proportioning is following:
| Composition | Content |
| SiO 2 | 64.49% |
| Na 2O | 13.45% |
| B 2O 3 | 7.43% |
Fibre diameter D
50Be 3.5 μ m.
2, with centrifugal cotton range upon range of be that 40mm is thick, uniform distribution is cut into 300 * 300mm size.
Centrifugal cotton is put into kiln 460 degree baking 10 minutes, and above be added with the heavy 25kg of 300 * 300mm size steel plate toast together.
3, take out naturally cooling after 10 minutes, thickness has been reduced to 8.5mm, can use as the special-purpose core of VIP.
The VIP thermal conductivity of this core encapsulation is about 2.1mw/m.k, if do not have hot pressing then thermal conductivity is about 2.4mw/m.k.
Embodiment 2
1, select centrifugal cotton for use, the major ingredient proportioning is following:
| Composition | Content |
| SiO 2 | 64.49% |
| Na 2O | 13.45% |
| B 2O 3 | 7.43% |
Fibre diameter D
50Be 3.5 μ m.
2, with centrifugal cotton range upon range of be that 40mm is thick, uniform distribution is cut into 300 * 300mm size.
Centrifugal cotton is put into kiln 460 degree bakings 10 minutes.
3, carry out roll extrusion 3 times with the heavy cylinder of the 20kg of diameter 15mm immediately after taking out after 10 minutes, naturally cooling then, thickness has been reduced to 8.0mm, can be as the special-purpose core use of VIP.
The VIP thermal conductivity of this core encapsulation is about 2.1mw/m.k, if do not heat roll extrusion then thermal conductivity is about 2.4mw/m.k.
Embodiment 3
1, select the cotton wet method core of making of flame for use, the major ingredient proportioning is following:
| Composition | Content |
| SiO 2 | 72.19% |
| Na 2O | 12.45% |
| B 2O 3 | 0.51% |
Fibre diameter D
50Be 3.0 μ m.
2, core monolithic 5mm is thick, is cut into 300 * 300mm size.
Core is put into kiln 540 degree baking 20 minutes, and above be added with the heavy 40kg of 300 * 300mm size steel plate toast together.
3, take out naturally cooling after 20 minutes, thickness is 4.8mm, can use as the special-purpose core of VIP.
The VIP thermal conductivity of this core encapsulation is about 2.7mw/m.k, if do not have hot pressing then thermal conductivity is about 3.2mw/m.k.
Embodiment 4
1, select the cotton wet method core of making of flame for use, the major ingredient proportioning is following:
| Composition | Content |
| SiO 2 | 72.19% |
| Na 2O | 12.45% |
| B 2O 3 | 0.51% |
Fibre diameter D
50Be 3.0 μ m.
2, core monolithic 5mm is thick, is cut into 300 * 300mm size.
Core is put into kiln 540 degree bakings 20 minutes.
3, carry out roll extrusion 3 times with the heavy cylinder of the 20kg of diameter 15mm immediately after taking out after 20 minutes, naturally cooling then, thickness is 4.8mm, can be as the special-purpose core use of VIP.
The VIP thermal conductivity of this core encapsulation is about 2.7mw/m.k, if do not heat roll extrusion then thermal conductivity is about 3.2mw/m.k.
Embodiment 5
1, select the cotton wet method core of making of the cotton mixing of centrifugal cotton and flame for use, the major ingredient proportioning is following:
| Composition | Content |
| SiO 2 | 69.51% |
| Na 2O | 12.03% |
| B 2O 3 | 3.92% |
Fibre diameter D
50Be 3.0 μ m.
2, core monolithic 1.5mm is thick, is cut into 300 * 300mm size.
Core is put into kiln 520 degree baking 10 minutes, and above be added with the heavy 40kg of 300 * 300mm size steel plate toast together.
3, take out naturally cooling after 10 minutes, thickness is 1.4mm, can use as the special-purpose core of VIP.
The VIP thermal conductivity of this core encapsulation is about 2.3mw/m.k, if do not have hot pressing then thermal conductivity is about 2.8mw/m.k.
Embodiment 6
1, select the cotton wet method core of making of the cotton mixing of centrifugal cotton and flame for use, the major ingredient proportioning is following:
| Composition | Content |
| SiO 2 | 69.51% |
| Na 2O | 12.03% |
| B 2O 3 | 3.92% |
Fibre diameter D
50Be 3.0 μ m.
2, core monolithic 1.5mm is thick, is cut into 300 * 300mm size.
Core is put into kiln 520 degree bakings 10 minutes.
3, carry out roll extrusion 3 times with the heavy cylinder of the 20kg of diameter 15mm immediately after taking out after 10 minutes, naturally cooling then, thickness is 1.4mm, can be as the special-purpose core use of VIP.
The VIP thermal conductivity of this core encapsulation is about 2.3mw/m.k, if do not heat roll extrusion then thermal conductivity is about 2.8mw/m.k.
Claims (5)
1. preparation method who is used for the core of vacuum insulation panel; What it is characterized in that this core employing is that super glass wool is a main raw material; Handle certain hour and form through after the wet process technique shaping core being heat-treated and exerting pressure, adopt the vacuum insulation panel thermal conductivity low 10%～20% of the core encapsulation that core that this method produces handles than heating and pressurizing not.
2. the preparation method of core as claimed in claim 1, its thermal treatment temp are specially 0～100 ℃ of the melt temperature point that is lower than core, exert pressure to more than or equal to the cylinder roll extrusion of 5kg or more than or equal to 10kg/m
2Dull and stereotyped pressure, the time of exerting pressure is for more than or equal to 10 seconds.
3. the super glass wool raw material of core as claimed in claim 1, this raw material are that flame method super glass wool or centrifuging super glass wool or the two are used in combination or add mineral wool again and mix and use.
4. the super glass wool raw material is passed through making beating, slagging-off, dehydration, heating, drying, is cut into VIP production specified dimension.
5. wet process technique as claimed in claim 1 comprises raw material process making beating, slagging-off, dehydration, heating, drying, is cut into this several steps of VIP production specified dimension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110146913 CN102807321A (en) | 2011-06-02 | 2011-06-02 | Method for preparing core material for vacuum heat-insulation plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110146913 CN102807321A (en) | 2011-06-02 | 2011-06-02 | Method for preparing core material for vacuum heat-insulation plate |
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| CN102807321A true CN102807321A (en) | 2012-12-05 |
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| CN 201110146913 Pending CN102807321A (en) | 2011-06-02 | 2011-06-02 | Method for preparing core material for vacuum heat-insulation plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021077849A1 (en) * | 2019-10-21 | 2021-04-29 | 袁飞 | Glass fiber group and glass fiber reinforced resin-based composite material |
| WO2021077848A1 (en) * | 2019-10-21 | 2021-04-29 | 袁飞 | Glass fiber group and fabrication method therefor, and glass fiber reinforced resin matrix composite material and fabrication method therefor |
-
2011
- 2011-06-02 CN CN 201110146913 patent/CN102807321A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021077849A1 (en) * | 2019-10-21 | 2021-04-29 | 袁飞 | Glass fiber group and glass fiber reinforced resin-based composite material |
| WO2021077848A1 (en) * | 2019-10-21 | 2021-04-29 | 袁飞 | Glass fiber group and fabrication method therefor, and glass fiber reinforced resin matrix composite material and fabrication method therefor |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121205 |