CN101694080A - Preparation method of special VIP nanometer core material for refrigerator - Google Patents
Preparation method of special VIP nanometer core material for refrigerator Download PDFInfo
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Abstract
The invention discloses a preparation method of a special VIP nanometer core material for a refrigerator, which comprises the following steps: (1) conducting pulping-dispersing on 20-25% by weight of alkali-free glass fiber with average diameter of 0.1-0.5mum, 30-35% by weight of high-alkali glass fiber with average diameter of 0.3-0.8mum, 20-25% by weight of high-alkali glass fiber with average diameter of 0.8-1.5mum and 15-30% by weight of high-alkali glass fiber with average diameter of 1-2mum; (2) diluting pulp, removing slag, then conducting wet forming to obtain wet paper, and conducting suction dehydration on the wet paper under the condition of 0.1-0.5 Mpa vacuum degree to lead the water ratio of the wet paper to be less than 20%; and (3) drying the wet paper at the temperature of 200-300 DEG C to obtain the product. The special VIP nanometer core material has the advantages of low heat conduction coefficient and good thermal insulation effect, and does not contain any hazardous substance, thus being the ideal environment-friendly insulated material special for the refrigerator.
Description
Technical field
The present invention relates to the vacuum heat-insulating plate of refrigerator insulation usefulness, specifically, is the core of the special-purpose vacuum heat-insulating plate of a kind of refrigerator.
Background technology
Vacuum heat-insulating plate (Vacuum Insulation Panel is called for short VIP) is a kind of novel super insulation material, and its thermal conductivity factor has outstanding insulation capacity less than 0.010w/mk, also has the characteristics of saving the space simultaneously.At present, the VIP plate has begun to be applied to the adiabatic fields of insulation such as household appliances such as refrigerator, refrigerator, electric heater and medical, cold chain, building, and energy-saving effect is obvious.
The VIP plate is made up of three parts usually: trapping structure, core and getter.Wherein, the trapping structure is a bag shaped structure, and effect is core to be vacuumized the back encapsulation get up to form vacuum state.The main effect of gas absorption material is to absorb the interior residual air of VIP plate to keep certain vacuum.Core is used mushy material always, and its primary effect is to support, and it is flat to avoid the trapping structure to stay at vacuum condition; Next is to stop heat radiation.Core commonly used has polyurethane foam heat insulation material, polyvinyl chloride insulation material and simple glass heat-preservation cotton etc., and their performance sees Table 1.
The main performance of the existing core of table 1
| Title | Thermal conductivity factor W/ (m.k) | Material density (kg/m 3) | The highest bearing temperature (℃) | Hot loading shrinkage temperature |
| Polyurethane foam heat insulation material | ??0.024 | ??40 | ??≤120 | ??≤120 |
| The polyvinyl chloride insulation material | ??0.048 | ??60 | ??≤120 | ??≤120 |
| The simple glass heat-preservation cotton | ??0.046 | ??32 | ??≥400 | ??≥400 |
Because the specific area of above-mentioned core is less, so thermal conductivity factor is big, heat insulation effect is limited.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of specific area is big, thermal conductivity factor is low, the preparation method of the special VIP nanometer core material for refrigerator of high insulating effect.
In order to address the above problem, the preparation method of special VIP nanometer core material for refrigerator of the present invention comprises the following steps:
Step (1), be that the average diameter of alkali-free glass fibre, 30～35% weight of 0.1～0.5 μ m is that the average diameter of the high alkali glass fibre of 0.3～0.8 μ m, 20～25% weight is that the average diameter of the high alkali glass fibre of 0.8～1.5 μ m and 15～30% weight is the dispersion of pulling an oar in being added with the aqueous solution of sulfuric acid of the high alkali glass fibre of 1～2 μ m with the average diameter of 20～25% weight, and the mass concentration of control slurry is 4.5～5.5%, beating degree is 44～46 ° of SR, and acidity is pH3.5～4.0;
It is 0.4～0.6% that step (2), the slurry that step (1) is obtained are diluted to mass concentration, slagging-off is carried out wet moulding with paper machine then again, obtains l Water Paper, under vacuum is the condition of 0.1～0.5MPa, l Water Paper is aspirated dehydration again, make moisture content＜20% of l Water Paper;
Step (3), the l Water Paper that step (2) is obtained carry out dried under 200～300 ℃, get product.
The present invention arranges in pairs or groups the high alkali glass fibre of different thicknesses and is in the same place with alkali-free glass fibre, both increased specific area, has controlled cost again, makes special VIP nanometer core material for refrigerator through the papermaking moulding at last.Special VIP nanometer core material for refrigerator by the present invention's preparation has surfacing, and structure is well-balanced, and specific area is big, and thermal conductivity factor is low, the advantage of high insulating effect.
Preferred embodiment as technique scheme, the preparation method of described high alkali glass fibre and alkali-free glass fibre is: after high-alkali glass ball or e-glass marble fusing, through diameter is following of the arrangement small opening of 0.5～1mm, the wire drawing diameter is controlled at 10～20 μ m, drawing speed is 2.5～3m/min, again under 1600～1800 ℃ of high temperature, with the flame of combustion chamber ejection glass yarn is made glass fibre below the 5 μ m, the nozzle width of combustion chamber is 6～10mm, and the winding-up air velocity is 800～1000m/s.As preferably, the fusion temperature of described high-alkali glass ball is 1200～1400 ℃, and the fusion temperature of described e-glass marble is 1600～1800 ℃.As preferably, used bushing material is the GH4755 alloy, and nozzle is No. 22 zircon corundum bricks.
Another preferred embodiment as technique scheme, during suction processed in the step (2), divide three sections vacuum draves, first section vacuum is 0.1～0.2Mpa, second section vacuum is 0.2～0.25Mpa, and the 3rd section vacuum is 0.4～0.5Mpa.
As another preferred embodiment of technique scheme, during dried in the step (2), divide three sections dryings, first section temperature is 280 ℃, and second section temperature is 250 ℃, and the 3rd section temperature is 250 ℃, is dried to the final products moisture and is lower than 0.03%.
Compared with prior art, the invention has the beneficial effects as follows:
(1) average diameter of the used fiber of the present invention is less than 2 μ m, wherein the thinnest average fibre diameter is lower than 0.1 μ m, and this is other relevant insulation material average fibre diameter that is beyond one's reach, and therefore the specific area of the core that is made by the present invention is big, thermal conductivity factor is low, high insulating effect;
(2) this core is natural mineral raw, does not contain any harmful substance, is the environmental protection of refrigerator special use, the ideal material of insulation;
(3) adopt the papermaking moulding, have surfacing, density compactness, steady quality, advantage such as thermal conductivity factor is even.
The specific embodiment
Further the present invention is illustrated below in conjunction with embodiment.
Embodiment 1
The first step: the preparation method of ultra-fine fibre glass
Make superfine alkali free glass fibre and high alkali glass fibre by prior art.
Second step, be that the average diameter of alkali-free glass fibre, 30% weight of 0.2 μ m is that the average diameter of the high alkali glass fibre of 0.5 μ m, 20% weight is that the average diameter of the high alkali glass fibre of 0.8 μ m and 30% weight is the dispersion of pulling an oar in being added with the aqueous solution of sulfuric acid of the high-alkali long glass fiber of 1.5 μ m with the average diameter of 20% weight, and the mass concentration of control slurry is 5%, beating degree is 45 ° of SR, acidity with sulfuric acid control slurry is pH2.5, and beating time is 45min.
The 3rd step, the slurry that obtains added to be diluted to mass concentration in the stock tank be 0.5%, remove the gred, then with the paper machine moulding of manufacturing paper with pulp with centrifugal slag remover.The present invention adopts wet therapy forming process, and this technology is to copy paper rear end principle similar.For homogeneity and the stability that guarantees prepared VIP nanometer core material, slurry concentration of the present invention is lower, yet high moisture content must be equipped with suction and the drying process that adapts, so l Water Paper is before entering drying room, require humidity to be lower than 20%, this requires the vacuum ability must reach requirement.The present invention divides three sections vacuum draves, every section vavuum pump of selecting different vacuum sizes according to technological requirement, first section main purpose is slight dehydration, vacuum is 0.1Mpa, and it is long that second section main purpose guarantees that waterline is difficult for, and water absorption reaches 40%, therefore vacuum is 0.2Mpa, the 3rd section main purpose guarantees that into the humidity of drying room is 20%, then needs powerful suction force, and vacuum is 0.5Mpa.The thicker VIP nanometer core material of preparation then needs to increase vacuum if desired, and this it will be apparent to those skilled in the art that.
The 4th goes on foot, the l Water Paper that obtains is dried, take into full account energy-conservation principle simultaneously, when this drying room of design, for making full use of recycling of thermal source, design drying room length is 32～36 meters, is divided into three sections and carries out drying, and first section temperature is 280 ℃, second section temperature is 250 ℃, and the 3rd section temperature is 250 ℃.First section excessive because of humidity, do not carry out the integral body circulation, and circulation is only limited to first section inner loop, constantly replenishes new thermal source simultaneously, gets rid of 40～60% moisture; Second section and the 3rd section is carried out complete alternation, simultaneously supplemental heat source.Mode of heating all adopts direct-fired method, and the heat abstractor of process drying room inside carries out drying to the positive and negative surface of material.Whole suction and dry run are from 3～5 fens clock times of 99.96% to 0.03% needs of humidity.Cut out by required size dry back, gets product.
Embodiment 2
The first step: the preparation of ultra-fine fibre glass
Will available from high-alkali glass ball under 1300 ℃ of high temperature, melt, through diameter is that (the bushing material is the GH4755 alloy for the arrangement small opening of 1mm, nozzle is No. 22 zircon corundum bricks) following, the wire drawing diameter is controlled at 20 μ m, and drawing speed is 2.5m/min, again under 1600 ℃ of high temperature, with the flame of combustion chamber ejection glass yarn is made glass fibre below the 2 μ m, the nozzle width of combustion chamber is 10mm, and the winding-up air velocity is 800m/s, collection is cotton, gets high alkali glass fibre.
The preparation method of alkali-free glass fibre is identical with high alkali glass fibre, different is: the fusion temperature of alkali-free glass fibre is 1700 ℃, the diameter of small opening is 0.5mm, the wire drawing diameter is 10 μ m, drawing speed is 3m/min, again under 1800 ℃ of high temperature, with the flame of combustion chamber ejection glass yarn is made glass fibre below the 0.5 μ m, the nozzle width of combustion chamber is 6mm, and the winding-up air velocity is 1000m/s.
Second step, be that the average diameter of alkali-free glass fibre, 35% weight of 0.1 μ m is that the average diameter of the high alkali glass fibre of 0.3 μ m, 20% weight is that the average diameter of the high alkali glass fibre of 1 μ m and 20% weight is the dispersion of pulling an oar in being added with the aqueous solution of sulfuric acid of the high-alkali long glass fiber of 2 μ m with the average diameter of 25% weight, and the mass concentration of control slurry is 4.5%, beating degree is 45 ° of SR, acidity with sulfuric acid control slurry is pH2.5, and beating time is 45min.
The 3rd step, identical with embodiment 1.
Embodiment 3
The preparation method is with embodiment 2, the average diameter that consists of 22% weight of blended fiber is that the average diameter of alkali-free glass fibre, 33% weight of 0.5 μ m is that the average diameter of the high alkali glass fibre of 0.8 μ m, 25% weight is that the average diameter of the high alkali glass fibre of 1.5 μ m and 20% weight is that the high alkali glass fibre of 2 μ m detects the VIP nanometer core material that obtains by standard GB/T13350-2000, the results are shown in Table 1.
Table 1: the performance of the VIP nanometer core material that the present invention makes
| Title | Thermal conductivity factor W/ (m.k) | Material density (kg/m 3) | The highest bearing temperature (℃) | Hot loading shrinkage temperature |
| Embodiment 1 | ??0.010 | ??180 | ??520 | ??520 |
| Embodiment 2 | ??0.0073 | ??187 | ??530 | ??530 |
| Embodiment 3 | ??0.0085 | ??184 | ??515 | ??515 |
This shows that the thermal conductivity factor of the VIP nanometer core material that the present invention makes is lower, high insulating effect, and also other performance all is better than existing VIP core.
Claims (6)
1. the preparation method of a special VIP nanometer core material for refrigerator is characterized in that comprising the following steps:
Step (1), be that the average diameter of alkali-free glass fibre, 30～35% weight of 0.1～0.5 μ m is that the average diameter of the high alkali glass fibre of 0.3～0.8 μ m, 20～25% weight is that the average diameter of the high alkali glass fibre of 0.8～1.5 μ m and 15～30% weight is the dispersion of pulling an oar in being added with the aqueous solution of sulfuric acid of the high alkali glass fibre of 1～2 μ m with the average diameter of 20～25% weight, and the mass concentration of control slurry is 4.5～5.5%, beating degree is 44～46 ° of SR, and acidity is pH 3.5～4.0;
It is 0.4～0.6% that step (2), the slurry that step (1) is obtained are diluted to mass concentration, slagging-off is carried out wet moulding with paper machine then again, obtains l Water Paper, under vacuum is the condition of 0.1～0.5MPa, l Water Paper is aspirated dehydration again, make moisture content＜20% of l Water Paper;
Step (3), the l Water Paper that step (2) is obtained carry out dried under 200～300 ℃, get product.
2. the preparation method of special VIP nanometer core material for refrigerator according to claim 1, it is characterized in that: the preparation method of described high alkali glass fibre and alkali-free glass fibre is: after high-alkali glass ball or e-glass marble fusing, through diameter is following of the arrangement small opening of 0.5～1mm, the wire drawing diameter is controlled at 10～20 μ m, drawing speed is 2.5～3m/min, again under 1600～1800 ℃ of high temperature, with the flame of combustion chamber ejection glass yarn is made glass fibre below the 3 μ m, the nozzle width of combustion chamber is 6～10mm, and the winding-up air velocity is 800～1000m/s.
3. the preparation method of special VIP nanometer core material for refrigerator according to claim 2, it is characterized in that: the fusion temperature of described high-alkali glass ball is 1200～1400 ℃, the fusion temperature of described e-glass marble is 1600～1800 ℃.
4. the preparation method of special VIP nanometer core material for refrigerator according to claim 2, it is characterized in that: used bushing material is the GH4755 alloy, nozzle is No. 22 zircon corundum bricks.
5. the preparation method of special VIP nanometer core material for refrigerator according to claim 1, it is characterized in that: during suction processed in the step (2), divide three sections vacuum draves, first section vacuum is 0.1～0.2Mpa, second section vacuum is 0.2～0.25Mpa, and the 3rd section vacuum is 0.4～0.5Mpa.
6. according to the preparation method of claim 1 or 2 or 4 described special VIP nanometer core material for refrigerator, it is characterized in that: during dried in the step (2), divide three sections dryings, first section temperature is 280 ℃, second section temperature is 250 ℃, the 3rd section temperature is 250 ℃, is dried to the final products moisture and is lower than 0.03%.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102330379A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Pulping method of glass wool core material |
| CN102330389A (en) * | 2011-07-13 | 2012-01-25 | 苏州维艾普新材料有限公司 | Method for making high-performance vacuum heat insulating plate core material |
| CN102330376A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Pulping method of glass wool core material |
| CN102330387A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Method for cutting finished glass wool core material product |
| CN102330388A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Forming method of glass wool core material |
| CN102942305A (en) * | 2012-11-22 | 2013-02-27 | 重庆再升科技股份有限公司 | Novel method for preparing mineral wool Vacuum Insulation Panel (VIP) core material |
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| CN104294698A (en) * | 2014-08-18 | 2015-01-21 | 常州大利节能新材料有限公司 | Ultrastrong vacuum thermal insulation plate core material manufacturing technology |
| CN106759992A (en) * | 2016-12-21 | 2017-05-31 | 安徽百特新材料科技有限公司 | A kind of VIP core plates for heat insulating board |
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- 2009-09-30 CN CN2009101910465A patent/CN101694080B/en active Active
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| CN102330379A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Pulping method of glass wool core material |
| CN102330376A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Pulping method of glass wool core material |
| CN102330387A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Method for cutting finished glass wool core material product |
| CN102330388A (en) * | 2011-06-22 | 2012-01-25 | 苏州维艾普新材料有限公司 | Forming method of glass wool core material |
| CN102330389A (en) * | 2011-07-13 | 2012-01-25 | 苏州维艾普新材料有限公司 | Method for making high-performance vacuum heat insulating plate core material |
| CN102942305B (en) * | 2012-11-22 | 2015-09-02 | 重庆再升科技股份有限公司 | The preparation method of mineral wool core material of vacuum heat insulation plate |
| CN102942305A (en) * | 2012-11-22 | 2013-02-27 | 重庆再升科技股份有限公司 | Novel method for preparing mineral wool Vacuum Insulation Panel (VIP) core material |
| CN103114502B (en) * | 2013-01-25 | 2016-01-20 | 重庆再升科技股份有限公司 | A kind of preparation method of high-grade low-temperature bottle sheathing paper |
| CN103114502A (en) * | 2013-01-25 | 2013-05-22 | 重庆再升科技股份有限公司 | Method for preparing high-grade low-temperature bottle insulating paper |
| CN103244793A (en) * | 2013-05-31 | 2013-08-14 | 重庆再升科技股份有限公司 | Novel glass fiber vacuum insulation panel core and preparation method |
| CN103277631A (en) * | 2013-05-31 | 2013-09-04 | 重庆再升科技股份有限公司 | Glass-fiber vacuum insulation panel nano core material and preparation method thereof |
| CN103277631B (en) * | 2013-05-31 | 2015-11-11 | 重庆再升科技股份有限公司 | A kind of glass-fiber vacuum insulation panel nano core material and preparation method thereof |
| CN103244793B (en) * | 2013-05-31 | 2015-12-09 | 重庆再升科技股份有限公司 | A kind of novel glass fiber core material of vacuum heat insulation plate and preparation method |
| CN104294698A (en) * | 2014-08-18 | 2015-01-21 | 常州大利节能新材料有限公司 | Ultrastrong vacuum thermal insulation plate core material manufacturing technology |
| CN106759992A (en) * | 2016-12-21 | 2017-05-31 | 安徽百特新材料科技有限公司 | A kind of VIP core plates for heat insulating board |
| CN106836532A (en) * | 2016-12-21 | 2017-06-13 | 安徽百特新材料科技有限公司 | A kind of processing method of STP outer wall vacuums warming plate |
| CN106836532B (en) * | 2016-12-21 | 2019-10-22 | 安徽百特新材料科技有限公司 | A kind of processing method of STP outer wall vacuum insulation board |
| CN111467875A (en) * | 2020-04-28 | 2020-07-31 | 南京玻璃纤维研究设计院有限公司 | Nano-cellulose glass fiber composite filter material and preparation method and application thereof |
| CN113551103A (en) * | 2021-06-30 | 2021-10-26 | 上海宝冶集团有限公司 | Method for fixing super heat-insulating material of water beam of heating furnace |
| CN113551103B (en) * | 2021-06-30 | 2022-09-16 | 上海宝冶集团有限公司 | Method for fixing super heat-insulating material of water beam of heating furnace |
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