CN103244793B - A kind of novel glass fiber core material of vacuum heat insulation plate and preparation method - Google Patents
A kind of novel glass fiber core material of vacuum heat insulation plate and preparation method Download PDFInfo
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- CN103244793B CN103244793B CN201310213164.8A CN201310213164A CN103244793B CN 103244793 B CN103244793 B CN 103244793B CN 201310213164 A CN201310213164 A CN 201310213164A CN 103244793 B CN103244793 B CN 103244793B
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Abstract
The invention discloses a kind of novel glass fiber core material of vacuum heat insulation plate, the diameter that this core material of vacuum heat insulation plate is less than 0.5% by the mass percentage of boron is that the low boron fiberglass cotton of 0.5 ~ 1.0um is made; The invention also discloses a kind of method preparing above-mentioned core material of vacuum heat insulation plate, comprise the following steps: 1) choose low boron fiberglass cotton; 2) the selected low boron fiberglass cotton of making beating dispersion obtains slurry; 3) diluted slurry; 4) remove the gred treatment step 3) slurry obtain l Water Paper with wet moulding; 5) dehydration process steps 4) l Water Paper; 6) dry treatment step 5) l Water Paper.Glass fibre air filter paper excellent combination property of the present invention, preparation process is pollution-free, long service life.
Description
Technical field
The present invention relates to a kind of vacuum heat-insulating plate and fill core, be specifically related to a kind of novel glass fiber core material of vacuum heat insulation plate and preparation method.
Background technique
Vacuum heat-insulating plate (VacuumInsulationPanel, be called for short VIP) be a kind of novel heat-insulation material, have that thermal conductivity is low, adiabatic heat insulating effect good, shared space proportion is little, each is incubated adiabatic field to be widely used in refrigerator, refrigerator car, submarine, airship, satellite etc., and environmental protection, energy-saving effect are obvious.Selecting of core material of vacuum heat insulation plate has material impact with making method to vacuum heat-insulating plate performance, core material of vacuum heat insulation plate vacuumize sealing working process and using process in a small amount of air (comprising nitrogen, oxygen, water vapor etc.) all can be had to enter; If glass fibre Boron contents is higher in core, be then easy to react with the air entered wherein, produce escaping gas, cause core secondary to be exitted, vacuum heat-insulating plate internal vacuum is diminished, heat insulation effect is deteriorated.
Simple glass often adds a certain amount of B
2o
3to improve performance, but B
2o
3volatility is large, prepares in glass fibre process, most of B in flame method
2o
3volatilization enter air when melting, forming boric acid, causing environmental pollution.In addition, conventional glass fibre alkali metal content is high, easily absorbs moisture, gradually lost strength at the environment of humidity.The ir transmissivity of low boron fiberglass is lower, and heat-transfer capability is poor, can play heat insulation effect well.
Summary of the invention
In view of this, the invention provides a kind of good heat insulating, environment friendly and pollution-free novel glass fiber core material of vacuum heat insulation plate, the present invention also provides a kind of method preparing this core.
The invention discloses a kind of novel glass fiber core material of vacuum heat insulation plate, the diameter that described core material of vacuum heat insulation plate is less than 0.5% by the mass percentage of boron is that the low boron fiberglass cotton of 0.5 ~ 1.0 μm is made.
Further, described core is made up of following material by mass parts: SiO
2: 68-71 part, Al
2o
3: 1.5-2.5 part, CaO:2-3 part, MgO:1-2 part, K
2o:1-2 part, Na
2o:9-10 part, B
2o
3: 0-0.5 part, BaO:3-4 part.
The invention also discloses a kind of method preparing described fiberglass vacuum insulation panel core, comprise the following steps:
1) diameter that the mass percentage choosing boron by proportioning is less than 0.5% is that the low boron fiberglass of 0.5 ~ 1.0 μm is cotton;
2) selected low boron fiberglass cotton is joined in aqueous sulfuric acid dispersion of pulling an oar and obtain slurry in 20 ~ 30 minutes, controlling stock quality concentration is 4% ~ 4.5%, pH=3.5 ~ 4.0;
3) step 2 is diluted with water) gained slurry to mass concentration is 0.3% ~ 0.5%;
4) with centrifugal slag remover to step 3) slurry after dilution removes the gred, and carries out wet moulding on inclined-wire form paper machine, obtain glass fibre l Water Paper;
5) dehydration process steps 4 is aspirated) gained l Water Paper, make the moisture content < 20% of l Water Paper, dewatering vacuum degree is 0.1 ~ 0.5MPa;
6) by step 5) l Water Paper by the drying room of 200-300 DEG C drying process, make l Water Paper water content lower than 0.03%.
Further, described step 1) in low boron fiberglass cotton obtained by following methods: first by low boron or boron-free glass fusing, then in aperture be 3.7 ~ 4.5mm drawbench on wire drawing, wire drawing diameter is 10 ~ 20 μm, drawing speed is 2.5 ~ 3m/min, finally to be drawn further by glass yarn at the burning flame of indoor 1600 ~ 1800 DEG C and is drawn into the glass fibre that diameter is 0.5-1 μm.
Further, described step 4) wet moulding divides six sections to carry out, and first paragraph dehydrating amount is 8m
3/ min.m, second segment dehydrating amount is 8m
3/ min.m, the 3rd section of dehydrating amount is 8m
3/ min.m, the 4th section of dehydrating amount is 7m
3/ min.m, the 5th section of dehydrating amount is 7m
3/ min.m, the 6th section of dehydrating amount is 5m
3/ min.m.
Further, described step 5) middle suction dehydration point three sections of vacuum draves, first paragraph degree of vacuum is 0.01 ~ 0.02MPa, and second segment degree of vacuum is 0.02 ~ 0.03MPa, and the 3rd section of degree of vacuum is 0.03 ~ 0.05MPa.
Further, described step 6) in dry process five sections carry out, first paragraph temperature is 280 ~ 300 DEG C, second segment temperature is 260 ~ 280 DEG C, 3rd section of temperature is 250 ~ 270 DEG C, 4th section of temperature is 220 ~ 250 DEG C, and the 5th section of temperature is 200 ~ 220 DEG C, is dried to final products water content lower than 0.03%.
The present invention adopts low boron fiberglass to prepare core material of vacuum heat insulation plate, has following beneficial effect:
1) glass fibre boron content of the present invention is low, and when can avoid using, boron and the air reaction remained in core generate the secondary that escaping gas causes and exit, thus make core insulating power stable, longer service life;
2) the present invention's low boron glass alkali metal content is low, the not easily moisture absorption, and thermal insulation property is more lasting;
3) low boron fiberglass of the present invention is obtained by low boron glass flame method, can reduce B in melt process
2o
3gas purging, decreases environmental pollution, and low boron glass cost is lower, contributes to reducing cost of production.Adopt that the VIP core surfaces prepared by method of the present invention is smooth, even structure, thermal conductivity are low;
4) adopt six sections of dehydrations when the present invention is shaping, each section of independent control dehydration forming flow, fully meets the low density pulping requirements of fiber, is also that good evenness and cross direction ration are created good process condition and ensured;
5) the present invention aspirates dehydration points three sections and carries out, and effectively can be ensured the compactness of product by control and suck degree of vacuum;
6) the present invention's drying process points five sections is carried out, and by control temperature, product is shunk evenly in Dry run, intensity is high.
Embodiment
Be illustrated the present invention further below in conjunction with embodiment's contrast, the following stated number is mass parts.
Embodiment 1
The method that the present embodiment prepares fiberglass vacuum insulation panel core comprises the following steps:
1) first by low boron or boron-free glass fusing, then in aperture be 3.7 ~ 4.5mm drawbench on wire drawing, wire drawing diameter is 10 ~ 20 μm, drawing speed is 2.5 ~ 3m/min, finally to be drawn further by glass yarn at the burning flame of indoor 1600 ~ 1800 DEG C and is drawn into the glass fibre that diameter is 0.5-1 μm; Wherein, the final obtained each component proportion of glass fibre is SiO
2: 70 parts, Al
2o
3: 2 parts, CaO:2.5 part, MgO:1.5 part, K
2o:1.5 part, Na
2o:9.5 part, B
2o
3: 0.4 part, BaO:3.5 part;
2) choose the low boron fiberglass cotton that diameter is 0.8 μm, selected low boron fiberglass cotton is joined in aqueous sulfuric acid dispersion of pulling an oar and obtains slurry, controlling stock quality concentration is 4%, PH=3.5, and jitter time is 30 minutes;
3) step 2 is diluted with water) gained slurry to mass concentration is 0.3%;
4) with centrifugal slag remover to step 3) slurry after dilution removes the gred, and carries out wet moulding on inclined-wire form paper machine, obtain glass fibre l Water Paper;
5) treatment step 4) gained l Water Paper, divide six sections and carry out, first paragraph dehydrating amount is 8m
3/ min.m, second segment dehydrating amount is 8m
3/ min.m, the 3rd section of dehydrating amount is 8m
3/ min.m, the 4th section of dehydrating amount is 7m
3/ min.m, the 5th section of dehydrating amount is 7m
3/ min.m, the 6th section of dehydrating amount is 5m
3/ min.m, obtains l Water Paper; Carry out suction dehydration to l Water Paper again, point three sections of vacuum draves, first paragraph degree of vacuum is 0.01MPa, and second segment degree of vacuum is 0.02MPa, and the 3rd section of degree of vacuum is 0.05MPa, final l Water Paper moisture content < 20%;
6) by step 5) l Water Paper by drying room divide five sections carry out drying process, first paragraph temperature is 300 DEG C, and second segment temperature is 280 DEG C, 3rd section of temperature is 250 DEG C, 4th section of temperature is 220 DEG C, and the 5th section of temperature is 200 DEG C, final l Water Paper water content < 0.03%.
Below in conjunction with laboratory data, the invention will be further described: table 1 reflects the embodiment of the present invention low boron VIP core and common boracic VIP core performance comparison.
Table 1 embodiment of the present invention low boron VIP core and common boracic VIP core performance comparison
As shown in Table 1, VIP core thermal conductivity of the present invention, the highest bearing temperature and hot loading shrinkage temperature are all higher than common boracic VIP core, and combination property is more excellent.VIP core Boron contents of the present invention is low, decreases and prepares B in core process
2o
3gas purging amount, reduces environment.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (4)
1. prepare a method for fiberglass vacuum insulation panel core, it is characterized in that: the low boron fiberglass cotton that described core material of vacuum heat insulation plate is 0.5 ~ 1.0 μm by diameter is made, described low boron fiberglass cotton is made up of following material by mass parts: SiO
2: 68-71 part, Al
2o
3: 1.5-2.5 part, CaO:2-3 part, MgO:1-2 part, K
2o:1-2 part, Na
2o:9-10 part, B
2o
3: 0-0.5 part, BaO:3-4 part;
Preparation process comprises the following steps:
1) diameter that the mass percentage choosing boron by proportioning is less than 0.5% is that the low boron fiberglass of 0.5 ~ 1.0 μm is cotton;
2) selected low boron fiberglass cotton is joined in aqueous sulfuric acid dispersion of pulling an oar and obtain slurry in 20 ~ 30 minutes, controlling stock quality concentration is 4% ~ 4.5%, pH=3.5 ~ 4.0;
3) step 2 is diluted with water) gained slurry to mass concentration is 0.3% ~ 0.5%;
4) with centrifugal slag remover to step 3) slurry after dilution removes the gred, and carries out wet moulding on inclined-wire form paper machine, obtain glass fibre l Water Paper;
5) dehydration process steps 4 is aspirated) gained l Water Paper, make the moisture content < 20% of l Water Paper, described suction dehydration point three sections of vacuum draves, first paragraph degree of vacuum is 0.01 ~ 0.02MPa, second segment degree of vacuum is 0.02 ~ 0.03MPa, and the 3rd section of degree of vacuum is 0.03 ~ 0.05MPa;
6) by step 5) l Water Paper by the drying room of 200-300 DEG C drying process, make l Water Paper water content lower than 0.03%.
2. prepare the method for fiberglass vacuum insulation panel core as claimed in claim 1, it is characterized in that: described step 1) in low boron fiberglass cotton obtained by following methods: first by low boron or boron-free glass fusing, then in aperture be 3.7 ~ 4.5mm drawbench on wire drawing, wire drawing diameter is 10 ~ 20 μm, drawing speed is 2.5 ~ 3m/min, finally to be drawn further by glass yarn at the burning flame of indoor 1600 ~ 1800 DEG C and is drawn into the glass fibre that diameter is 0.5-1 μm.
3. prepare the method for fiberglass vacuum insulation panel core as claimed in claim 1, it is characterized in that: described step 4) wet moulding divides six sections to carry out, and first paragraph dehydrating amount is 8m
3/ min.m, second segment dehydrating amount is 8m
3/ min.m, the 3rd section of dehydrating amount is 8m
3/ min.m, the 4th section of dehydrating amount is 7m
3/ min.m, the 5th section of dehydrating amount is 7m
3/ min.m, the 6th section of dehydrating amount is 5m
3/ min.m.
4. prepare the method for fiberglass vacuum insulation panel core as claimed in claim 1, it is characterized in that: described step 6) in dry process five sections carry out, first paragraph temperature is 280 ~ 300 DEG C, second segment temperature is 260 ~ 280 DEG C, 3rd section of temperature is 250 ~ 270 DEG C, 4th section of temperature is 220 ~ 250 DEG C, and the 5th section of temperature is 200 ~ 220 DEG C, is dried to final products water content lower than 0.03%.
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| CN201310213164.8A CN103244793B (en) | 2013-05-31 | 2013-05-31 | A kind of novel glass fiber core material of vacuum heat insulation plate and preparation method |
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| CN103244793B true CN103244793B (en) | 2015-12-09 |
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| CN103836306B (en) * | 2014-03-21 | 2016-06-22 | 山东展腾节能新材料科技有限公司 | Glass fibre ultralow temperature heat-barrier material production technology |
| CN104534224B (en) * | 2014-12-12 | 2017-04-05 | 中材科技股份有限公司 | A kind of thermal insulation cellucotton felt and preparation method thereof |
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| CN104908626B (en) * | 2015-04-21 | 2018-01-30 | 郭茂 | A kind of vehicle mounted portable insulating box |
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| CN106594458A (en) * | 2016-11-24 | 2017-04-26 | 苏州维艾普新材料股份有限公司 | Device for producing core material of vacuum insulated panel with double layers of wet forming machines |
| CN106630651A (en) * | 2016-12-26 | 2017-05-10 | 苏州维艾普新材料股份有限公司 | Glass fiber for preparing vacuum insulated panel core material |
| CN107022921B (en) * | 2017-04-17 | 2019-06-07 | 安徽百特新材料科技有限公司 | A kind of AB inorfil core plate processing method |
| CN108797209B (en) * | 2018-06-28 | 2021-07-20 | 重庆纤维研究设计院股份有限公司 | Low-boron filter paper and preparation method thereof |
| CN109825946A (en) * | 2019-02-21 | 2019-05-31 | 浙江华恒复合材料有限公司 | A kind of method of dry process vacuum insulation panel core material |
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Effective date of registration: 20180315 Address after: 636157 Dazhou Sichuan City Industrial Park in the county of Xuanhan Province Patentee after: XUANHAN ZHENGYUAN MICRO GLASS FIBER CO., LTD. Address before: 401120 Chongqing City, Yubei District Airport Industrial Park Airport Road No. 9 Patentee before: Chongqing Zaisheng Technology Corp., Ltd. |
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