CN103196007B - Core material of vacuum heat insulation plate and preparation method thereof - Google Patents
Core material of vacuum heat insulation plate and preparation method thereof Download PDFInfo
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- CN103196007B CN103196007B CN201310117638.9A CN201310117638A CN103196007B CN 103196007 B CN103196007 B CN 103196007B CN 201310117638 A CN201310117638 A CN 201310117638A CN 103196007 B CN103196007 B CN 103196007B
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Abstract
The present invention relates to less, lower-cost core material of vacuum heat insulation plate of a kind of thermal conductivity and preparation method thereof.Described core material of vacuum heat insulation plate comprises mixed-forming: 70-100wt%, diameter is 6-13um, length be the glass chopped silk produced of 4-20mm fiber elongation method and 0-30wt%, diameter is 1.0-4um, length is the glass fibre cotton that 1-5mm flame method is produced.Central layer making method adopts multilayer liquid feeding, and multilayer vacuumizes dehydration, and make central layer form thin and fiber array is neat inside composition structure, this structure is conducive to core thermal conductivity and reduces.Core material of vacuum heat insulation plate thermal conductivity of the present invention is at below 0.03W/m.k, its heat conductivity of vacuum insulation panel is below 0.0025W/m.k, the glass fibre cotton core produced relative to 100% flame method is low, high insulating effect, greatly save the manufacture cost of core material of vacuum heat insulation plate simultaneously, stable and controllable for quality.
Description
Technical field
The present invention relates to a kind of core material of vacuum heat insulation plate and preparation method thereof, be specifically related to a kind of core material of vacuum heat insulation plate made for raw material with ultra-fine fibre glass cotton and glass chopped silk, it is applicable to the fields such as household electrical appliances insulation, Cold Chain Logistics, building heat preservation.
Background technique
Current core material of vacuum heat insulation plate generally selects porous medium, and as materials such as powdered silica, aerogel, glass fibre or microvoid polyurethanes, each material has its pluses and minuses.Secondly, often kind of central layer in use, must add siccative or getter, removes the gas and moisture that do not eliminate in obstructing film and core, ensures degree of vacuum, thus improve the working life of vacuum heat-insulating plate.Vacuum heat-insulating plate has applied in every field, and it meets customer requirement with the characteristic of energy-conservation, low-carbon (LC), environmental protection, safety.By investigation and practical operation known, selecting with making method of the inner core of vacuum heat-insulating plate is very large on the impact of its properties, core generally selects porous media material, as aerogel, polyurethane foam, SiO 2 powder, asbestos fiber, glass fibre etc.For core material of vacuum heat insulation plate, following four kinds of characteristics must be possessed: 1, under high vacuum negative pressure state, to vacuum insulation intralamellar part, there is supporting effect, prevent vacuum heat-insulating plate from shrinking, caving in; 2, heat conducting generation to be reduced as much as possible.3, must open-celled structure be possessed, gas can be discharged with prestissimo under negative pressure state; 4, material need possess under vacuum or ultralow degree of vacuum state, does not discharge gas or the least possible release gas.
At present because different types of vacuum heat-insulating plate application is different, the selection of its core also difference to some extent.Require that thermal resistance performance is good for household electrical appliances insulation, building heat preservation etc., thermal conductivity is low.Current most of thermal insulating material thermal conductivity is high, bulky, thickness generally between 1cm-5cm, after household electrical appliances insulation, Cold Chain Logistics, building heat preservation, reduce household electrical appliances, building utilized space and to be incubated the life-span short.Vacuum heat-insulating plate has complied with each field insulation demand just, wishes the requirement that warming plate lower thickness, thermal conductivity reduce.
Summary of the invention
Technical problem to be solved by this invention is to provide less, lower-cost core material of vacuum heat insulation plate of a kind of thermal conductivity and preparation method thereof.
For solving the problems of the technologies described above, the invention provides a kind of core material of vacuum heat insulation plate, it comprises mixed-forming: 70-100wt%, diameter is 6-13um, length be the glass chopped silk produced of 4-20mm fiber elongation method and 0-30wt%, diameter is 1.0-4um, length is the glass fibre cotton that 1-5mm flame method is produced.
It is shaping that this core material of vacuum heat insulation plate arranges cutting to desired thickness by laminated glass fibre sheet material lamination; Described glass fibre sheet is that the thickness of this lamella is even by the described glass chopped silk mixed and the distribution of glass fibre cotton layering isoplanar, the major part parallel lamella formed.Relative to the glass fibre core directly forming desired thickness, the stacked glass fibre core to desired thickness of employing laminated glass fibre sheet material of the present invention, the technique effect had: be beneficial to vacuum heat-insulating plate and vacuumize, to reduce the thermal conductivity of vacuum heat-insulating plate.
Due to the glass chopped silk that fiber elongation method is produced, industrialized production, industry is ripe, and efficiency is higher, and the cost of raw material is relatively low, and can make the thermal conductivity <0.0025W/m.k of the vacuum heat-insulating plate made.Therefore, core material of vacuum heat insulation plate cost of the present invention is low, stable and controllable for quality.
Adopt the glass fibre cotton that flame method manufactures, diameter is thin, length is short, therefore the corresponding glass fibre cotton density obtained is comparatively large, and the core material of vacuum heat insulation plate thermal conductivity made is lower, but if the glass fibre cotton adopting separately flame method to produce produces core material of vacuum heat insulation plate, meeting manufacture cost is high, and making the thermal conductivity of the vacuum heat-insulating plate made be difficult to reach below 0.0025W/m.k, quality is unstable, poor controllability; And less with the glass fibre cotton proportion of flame method production in core material of vacuum heat insulation plate of the present invention, in terms of existing technologies, greatly reduce cost of production, improve constant product quality.
The making method of above-mentioned core material of vacuum heat insulation plate, comprises the steps:
(1) get 70-100wt%, diameter is 6-13um, length is the glass chopped silk produced of 4-20mm fiber elongation method and 0-30wt%, diameter is 1.0-4um, length is the glass fibre cotton that 1-5mm flame method is produced;
(2) disperseed respectively by above-mentioned two kinds of fiber glass materials, then above-mentioned glass chopped silk and glass fibre cotton mixing and water adding are stirred, send into pond with slurry after stirring and be diluted with water, diluted concentration is to 0.3-1.0wt%.In whipping process, also add the hydroxylated cellulose of the 0.005-0.015% of above-mentioned two kinds of fiber glass material gross weights, to reduce electrostatic effect, and be beneficial to above-mentioned two kinds of glass fibres further and be uniformly dispersed;
(3) slurry diluted is sent into breast box, the slurries layering that breast box flows out flows on forming net, is evenly distributed with negative pressure suction inlet, to dewater under this forming net; Fiber laydown after dehydration is on described forming net and thickness is even, the distribution of layering isoplanar, and major part is parallel, forms the lamella of desired thickness, namely obtains glass chopped silk wet plate.
(4) adopting pressure roller to roll above-mentioned glass fibre wet plate, making its surfacing, thickness evenly (by controlling the thickness of the pressure adjusting glass fibre wet plate of pressure roller, and make glass fibre wet plate consistency of thickness);
(5) the glass fibre wet plate completing above-mentioned steps (4) is formed glass fibre sheet after dehydration, dry process;
(6) to desired thickness, carry out cutting by stacked for laminated glass fibre sheet material according to production requirement, be made into required core.(relative to the glass fibre core directly forming desired thickness, the stacked glass fibre core to desired thickness of employing laminated glass fibre sheet material of the present invention, the technique effect had: be beneficial to VIP and vacuumize, to reduce the thermal conductivity of VIP).
Under the pressure condition of 10KPa, the thickness of the glass fibre sheet that described step (5) generates is 0.5-5mm.The glass chopped filament diameter adopted owing to making central layer is 6-13um, and length is the glass chopped silk that 4-20mm fiber elongation method is produced, so under the pressure condition of 10KPa, described glass fibre sheet blank optimum thickness is 0.5-5mm.
When in described step (4), forming net dewaters to glass fibre cotton, the speed of forming net is 12-30 m/min.The wet plate even density of the glass chopped silk adopting this speed can effectively ensure to be produced by forming net and cotton combination, marshalling, integral thickness is relatively uniform, improves core material of vacuum heat insulation plate end product quality.
The top surface inclination of described forming net is arranged; Be provided with the diversion channel be connected with described breast box above forming net, the base plate of this diversion channel and the top surface being parallel of described forming net, the base plate of diversion channel is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net; Described negative pressure suction inlet is oppositely arranged with described narrow slit type nozzle respectively and is distributed in the side, downstream of each narrow slit type nozzle, and the fiber be beneficial in slurries is evenly distributed on the end face of described forming net.
As the preferred scheme of one, described forming net is conveyor type, is beneficial to continuous seepage.
As further preferred scheme, the feeding direction of described forming net end face be from bottom to top, be beneficial to fiber laydown on described forming net and thickness evenly, the distribution of layering isoplanar, most of parallel.
Technique effect of the present invention:
1, the glass fibre cotton that the glass chopped silk adopting 70-100wt% fiber elongation method to produce in the present invention and 0-30wt% flame method are produced is as core material of vacuum heat insulation plate raw material, the core material of vacuum heat insulation plate thermal conductivity produced is at below 0.030W/m.k, its thermal shield thermal conductivity is low relative to the glass fibre cotton core adopting 100wt% flame method to produce, and heat insulation effect is better; The cost of material that the glass chopped silk that fiber elongation method is produced simultaneously adopts is lower, greatly saves the manufacture cost of core material of vacuum heat insulation plate; Monolithic core thickness controls under 0.5-5mm(10kpa pressure), density domination is at 80kg/m3-200kg/m3, and compression ratio is slightly larger than the superfine glass fiber cotton core material adopting 100wt% flame method to produce, but can not have large impact to production technology;
2, core material of vacuum heat insulation plate of the present invention, has porous structure, can meet the Quick air-discharge performance that core material of vacuum heat insulation plate possesses;
3, it is extensive that the glass chopped silk that in the present invention, fiber elongation method is produced has the vacuum heat-insulating plate using scope that fire-retardant, sound-absorbing, characteristic that is nontoxic, environmental protection make to produce;
4, process for integrally manufacturing of the present invention is simple, adapts to industrialized production;
5, the present invention adopts multilayer liquid feeding, and multilayer vacuumizes, and be that central layer forms thin and that fiber array is neat internal structure, this structure is conducive to the reduction of core thermal conductivity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the process units of core material of vacuum heat insulation plate.
Embodiment
Below in conjunction with instantiation, the present invention is described in further detail.
Example 1
The core material of vacuum heat insulation plate of this example, this core material of vacuum heat insulation plate is 6-13um by diameter, length be 4-20mm fiber elongation method produce glass chopped silk and diameter be 1.0-4.0um, length be 1-5mm flame method produce glass fibre cotton be mixed; The glass fibre cotton that described flame method is produced accounts for 20wt%, and the glass chopped silk that described fiber elongation method is produced accounts for 80wt%, and the core thickness in vacuum insulation board finished product is 15 ± 1mm, the thermal conductivity≤0.0024W/m.k of the vacuum heat-insulating plate made.
The making method of above-mentioned core material of vacuum heat insulation plate, the concrete steps of this making method are as follows:
(1) cut-off footpath is 6-13um, length be 4-20mm fiber elongation method produce glass chopped silk and diameter be 1.0-4um, length be 1-5mm flame method produce glass fibre cotton; The glass fibre cotton ratio that described flame method is produced is 20wt%, and the glass chopped silk ratio that described fiber elongation method is produced is 80wt%;
(2) glass fiber material after disperseing two kinds by a certain percentage mixing and water adding sends into pond with slurry dilution after stirring, diluted concentration is to 0.3-0.5wt%, and add the hydroxylated cellulose of the 0.005-0.015% of above-mentioned two kinds of glass fibre gross weights, to reduce electrostatic effect;
(3) glass fiber slurry diluted feeding is stored stock tank;
(4) slurry stored in stock tank is sent into breast box 2, the slurries 3 that breast box 2 flows out flow on forming net 1 by multilayer nozzle 4 layering, the blower fan suction inlet (i.e. negative pressure suction inlet 5) corresponding with nozzle 4 is housed below forming net 1 and carries out batch vacuum dehydration.Fiber laydown after dehydration is formed evenly, arranges orderly lamella on forming net 1, namely makes glass chopped silk wet plate; In this step during forming net 1 pair of glass fiber slurry dehydration, the speed of forming net 1 is 20-25 m/min;
(5) carry out transverse direction to glass fibre wet plate to roll, make surfacing, the thickness of glass fibre wet plate is adjusted simultaneously, make glass fibre wet plate thickness be adjusted to 1mm-3mm;
(6) the glass fibre wet plate completing shaping is phoresied in the line belt of negative pressure of vacuum by glass fibre wet plate 60% moisture removal, make glass fibre wet plate water content control below 40%;
(7) then the glass fibre wet plate removing moisture is sent into baking and curing in roasting chamber 8, in roasting chamber 8, temperature controls at 250-300 degree Celsius, and baking time is 5-20 minute; Toast rear formation fiber glass core sheet material;
(8) according to production requirement, laminated glass fibre sheet material lamination is arranged whole plate to desired thickness and carry out cutting, cut into 600mm × 600mm, namely obtain core material of vacuum heat insulation plate finished product.
Fig. 1, the top surface inclination of described forming net 1 is arranged; Be provided with the diversion channel 7 be connected with described breast box 2 above forming net 1, the base plate of this diversion channel 7 and the top surface being parallel of described forming net 1, the base plate of diversion channel 7 is evenly distributed with the narrow slit type nozzle 4 that the length direction of multiple and described forming net 1 is vertical; Each negative pressure suction inlet 5 is oppositely arranged with described narrow slit type nozzle 4 respectively and is distributed in the side, downstream of each narrow slit type nozzle 4, and the fiber be beneficial in slurries is evenly distributed on the end face of described forming net.The width of narrow slit type nozzle 4 is 1-8mm.
Described forming net 1 is conveyor type, is beneficial to continuous seepage; The feeding direction of forming net 1 end face is from bottom to top, be beneficial to fiber laydown on described forming net and thickness evenly, the distribution of layering isoplanar, major part be parallel.
Embodiment 2
The core material of vacuum heat insulation plate of this example is 6-13um by diameter, length be 4-20mm fiber elongation method produce glass chopped silk and diameter be 1.0-4um, length be 1-5mm flame method produce glass fibre cotton be mixed; The glass fibre cotton that described flame method is produced accounts for 10wt%, and the glass chopped silk that described fiber elongation method is produced accounts for 90wt%, and the core thickness in vacuum insulation board finished product is 15 ± 1mm, the thermal conductivity≤0.0022W/m.k of the vacuum heat-insulating plate made.
The making method of the core material of vacuum heat insulation plate of this example, the step comprised is as follows:
(1) cut-off footpath is 6-13um, length be 4-20mm fiber elongation method produce glass chopped silk and diameter be 1.0-4um, length be 1-5mm flame method produce glass fibre cotton; The glass fibre cotton ratio that described flame method is produced is 10wt%, and the glass chopped silk ratio that described fiber elongation method is produced is 90wt%;
(2) glass fiber material after disperseing two kinds by a certain percentage mixing and water adding sends into pond with slurry dilution after stirring, diluted concentration also suitably adds hydroxylated cellulose to reduce electrostatic effect to 0.3-0.5wt%;
(3) glass fiber slurry diluted feeding is stored stock tank;
(4) slurry stored in stock tank is sent into breast box, the slurries that breast box flows out flow on forming net by the layering of multilayer nozzle, the blower fan suction inlet corresponding with nozzle is housed below forming net and carries out batch vacuum dehydration.Fiber laydown after dehydration forms uniform sequential lamella on forming net, just makes glass chopped silk wet plate; When in this step, forming net dewaters to glass fibre cotton, the speed of forming net is 20-25 m/min;
(5) carry out transverse direction to glass fibre wet plate to roll, make surfacing, the thickness of glass fibre wet plate is adjusted simultaneously, make glass fibre wet plate thickness be adjusted to 1mm-3mm;
(6) the glass fibre wet plate completing shaping is sent in the line belt of negative pressure of vacuum, by glass fibre wet plate 60% moisture removal, make glass fibre wet plate water content control below 40%;
(7) then the glass fibre wet plate removing moisture is sent into baking and curing in roasting chamber 8, baking the temperature inside the box controls at 250-300 degree Celsius, and baking time is about 5-20 minute; Toast rear formation glass fibre sheet;
(8) according to production requirement, the setting of laminated glass fibre sheet material lamination is carried out cutting to desired thickness, namely obtain core material of vacuum heat insulation plate finished product.
Embodiment 3
The core material of vacuum heat insulation plate of the present embodiment is 6-13um by diameter, length be 4-20mm fiber elongation method produce glass chopped silk and diameter be 1.0-4um, length be 1-5mm flame method produce glass fibre cotton be mixed; The glass fibre cotton that described flame method is produced accounts for 15wt%, and the glass chopped silk that described fiber elongation method is produced accounts for 85wt%, and the thermal conductivity≤0.0021W/m.k of vacuum insulation board finished product.
The making method of the core material of vacuum heat insulation plate of the present embodiment, the concrete steps comprised are as follows:
(1) cut-off footpath is 6-13um, length be 4-20mm fiber elongation method produce glass chopped silk and diameter be 1.0-4um, length be 1-5mm flame method produce glass fibre cotton; The glass fibre cotton ratio that described flame method is produced is 15wt%, and the glass chopped silk ratio that described fiber elongation method is produced is 85wt%;
(2) glass fiber material after disperseing two kinds by a certain percentage mixing and water adding sends into pond with slurry dilution after stirring, diluted concentration is to 0.6wt% and add hydroxylated cellulose to reduce electrostatic effect;
(3) the glass fibre cotton slurries diluted feeding is stored stock tank;
(4) slurry stored in stock tank is sent into breast box, the slurries that breast box flows out flow on forming net by the layering of multilayer nozzle, the blower fan suction inlet corresponding with nozzle is housed below forming net and carries out batch vacuum dehydration.Fiber laydown after dehydration forms uniform sequential lamella on forming net, just makes glass chopped silk wet plate.When in this step, forming net dewaters to glass fibre cotton, the speed of forming net is 20-25 m/min;
(5) carry out transverse direction to glass fibre wet plate to roll, make surfacing, the thickness of glass fibre wet plate is adjusted simultaneously, make glass fibre wet plate thickness be adjusted to 1-3mm;
(6) on the line belt glass fibre wet plate completing shaping being sent to negative pressure of vacuum by glass fibre wet plate 60% moisture removal, make glass fibre wet plate water content control 40%;
(7) then the glass fibre wet plate removing moisture is sent into baking and curing in roasting chamber, baking the temperature inside the box controls at 250-300 degree Celsius, and baking time is about 5-30 minute; Toast rear formation glass fibre sheet;
(9) according to production requirement, the setting of laminated glass fibre sheet material lamination is carried out cutting to desired thickness, namely obtain core material of vacuum heat insulation plate finished product.
Claims (4)
1. a making method for core material of vacuum heat insulation plate, comprises the steps:
(1) get 70-100wt%, diameter is 6-13um, length is the glass chopped silk produced of 4-20mm fiber elongation method and 0-30wt%, diameter is 1.0-4um, length is the glass fibre cotton that 1-5mm flame method is produced;
(2) disperseed respectively by above-mentioned two kinds of glass fibres, then above-mentioned glass chopped silk and glass fibre cotton mixing and water adding are stirred, send into pond with slurry after stirring and be diluted with water, diluted concentration is to 0.3-1.0wt%;
(3) slurry diluted is sent into breast box, the slurry layering that breast box flows out flows on a forming net, is evenly distributed with negative pressure suction inlet, to dewater under this forming net; Fiber laydown after dehydration is on described forming net and thickness is even, layering isoplanar distributes, major part is parallel, forms the lamella of desired thickness, namely obtains glass chopped silk wet plate;
(4) adopt pressure roller to roll above-mentioned glass fibre wet plate, make its surfacing, thickness even;
(5) the glass fibre wet plate completing above-mentioned steps (4) is formed glass fibre sheet after dehydration, dry process;
(6) setting of laminated glass fibre sheet material lamination is carried out cutting to desired thickness, make required core;
In the dilution of described step (2), add the hydroxylated cellulose of the 0.005-0.015% of above-mentioned two kinds of glass fibre gross weights;
The top surface inclination of described forming net is arranged; Be provided with the diversion channel be connected with described breast box above forming net, the base plate of this diversion channel and the top surface being parallel of described forming net, the base plate of diversion channel is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net; Described negative pressure suction inlet is oppositely arranged with described narrow slit type nozzle respectively and is distributed in the side, downstream of each narrow slit type nozzle.
2. the making method of core material of vacuum heat insulation plate as claimed in claim 1, is characterized in that: when in described step (3), forming net dewaters to glass fibre cotton, the speed of forming net is 12-30 m/min.
3. the making method of core material of vacuum heat insulation plate as claimed in claim 1, is characterized in that: described forming net is conveyor type.
4. the making method of core material of vacuum heat insulation plate as claimed in claim 3, is characterized in that: the feeding direction of described forming net end face is for from bottom to top.
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| CN103332922A (en) * | 2013-07-17 | 2013-10-02 | 江苏常科新材料有限公司 | Heat preservation core material for insulation and method for preparing core material |
| CN103726395A (en) * | 2013-08-02 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | Material capable of adsorbing harmful gas and preparation method for material |
| CN103819170A (en) * | 2014-02-18 | 2014-05-28 | 苏州隆瑞绝热材料有限公司 | Ventilating-type copious-cooling heat-insulating material and preparation method thereof |
| 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 |
| CN104494235B (en) * | 2015-01-06 | 2016-09-07 | 青岛科瑞新型环保材料有限公司 | A kind of vacuum heat-insulating plate and manufacture method thereof |
| CN105133186B (en) * | 2015-08-31 | 2018-01-05 | 南京航空航天大学 | A kind of method for realizing glass fibre core self demixing |
| CN107698272B (en) * | 2017-11-03 | 2020-07-03 | 辽宁科途环保节能材料有限公司 | Composite core material for vacuum insulation panel and preparation method thereof |
| KR101898871B1 (en) * | 2018-02-08 | 2018-09-14 | 주식회사 엔바이오니아 | Sound Absorbing Panel and manufacturing method thereof |
| CN109162026A (en) * | 2018-10-31 | 2019-01-08 | 海宁睿诚科技股份有限公司 | A kind of preparation method of novel glass fiber core material of vacuum heat insulation plate |
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| SE421328B (en) * | 1978-04-25 | 1981-12-14 | Karlstad Mekaniska Ab | PROCEDURE AND DEVICE FOR IMAGE OF A MULTILAYER MELT Beam |
| US6277241B1 (en) * | 1997-11-14 | 2001-08-21 | Kimberly-Clark Worldwide, Inc. | Liquid absorbent base web |
| WO2012103547A1 (en) * | 2011-01-28 | 2012-08-02 | Donaldson Company, Inc. | Method and apparatus for forming a fibrous media |
| CN102330871A (en) * | 2011-07-13 | 2012-01-25 | 苏州维艾普新材料有限公司 | Vacuum heat insulation plate core material and manufacturing method thereof |
| CN102628538A (en) * | 2012-03-30 | 2012-08-08 | 周介明 | Layered vacuum insulation board core material and preparation method thereof |
| CN102788229B (en) * | 2012-07-23 | 2015-05-13 | 青岛科瑞新型环保材料有限公司 | Method for manufacturing a uniform-density vacuum insulated panel with high production efficiency |
| CN102979009A (en) * | 2012-12-13 | 2013-03-20 | 苏州维艾普新材料有限公司 | Chopped glass fiber core material harmless to human body and preparation method thereof |
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