CN103196007A - Vacuum insulated panel core material and manufacturing method thereof - Google Patents
Vacuum insulated panel core material and manufacturing method thereof Download PDFInfo
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- CN103196007A CN103196007A CN2013101176389A CN201310117638A CN103196007A CN 103196007 A CN103196007 A CN 103196007A CN 2013101176389 A CN2013101176389 A CN 2013101176389A CN 201310117638 A CN201310117638 A CN 201310117638A CN 103196007 A CN103196007 A CN 103196007A
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Abstract
The invention relates to a vacuum insulated panel core material and a manufacturing method thereof. the core material is small in heat conductivity coefficient and low in cost and comprises 70wt% to 100wt% of short chopped glass fiber strands with diameters in a range of 6 microns to 13 microns and lengths in a range of 4 millimeters to 20 millimeters and 0wt% to 30wt% of glass fiber cotton with diameters in a range of 1.0 microns to 4 microns and lengths in a range of 1 millimeters to 5 millimeters, wherein the short chopped glass fiber strands are produced through a strand drawing method, and the glass fiber cotton is produced through a flame method flame method. According to the manufacturing method for core panels, multi-layer liquid adding and multi-layer vacuum dewatering are used, the heat conductivity coefficient of the vacuum insulated panel core material is below 0.03W/m.k, and the heat conductivity coefficient of the vacuum insulated panel is below 0.0025 W/m.k, the heat conductivity coefficient is lower than that of a glass fiber cotton core material 100% produced through the flame method, the insulating effect is good, the manufacture cost of the vacuum insulated panel core material is saved greatly simultaneously, and the quality is stable and controllable.
Description
Technical field
The present invention relates to a kind of core material of vacuum heat insulation plate and preparation method thereof, being specifically related to a kind of is the core material of vacuum heat insulation plate that raw material is made with the cotton and glass chopped silk of ultra-fine fibre glass, and it is applicable to fields such as household electrical appliances insulation, Cold Chain Logistics, building heat preservation.
Background technique
Present core material of vacuum heat insulation plate is generally selected porous medium, and as materials such as powdered silica, aerogel, glass fibre or microvoid polyurethanes, each material has its pluses and minuses.Secondly, every kind of central layer must add siccative or getter in use, removes the gas and the moisture that do not eliminate in obstructing film and the core, guarantees degree of vacuum, thereby improves the working life of vacuum heat-insulating plate.Vacuum heat-insulating plate has applied in the every field, and it has satisfied customer requirement with the characteristic of energy-conservation, low-carbon (LC), environmental protection, safety.By the investigation and practical operation as can be known, selecting for use with making method of the inner core of vacuum heat-insulating plate is very big to its every performance impact, core is generally selected porous media material for use, as aerogel, polyurethane foam, SiO 2 powder, asbestos fiber, glass fibre etc.For core material of vacuum heat insulation plate, must possess following four specific characters: 1, under the high vacuum negative pressure state, the vacuum insulation intralamellar part is had supporting effect, prevent that vacuum heat-insulating plate from shrinking, caving in; 2, to reduce heat conducting generation as much as possible.3, must possess open-celled structure, gas can be discharged from 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 of different types of vacuum heat-insulating plate application difference, the selection of its core is difference to some extent also.Require the thermal resistance performance good for household electrical appliances insulation, building heat preservation etc., thermal conductivity is low.Present most of thermal insulating material thermal conductivity height, bulky, thickness generally between 1cm-5cm, be used for household electrical appliances insulation, Cold Chain Logistics, building heat preservation after, utilized space and the insulation life-span of having reduced household electrical appliances, building are short.Vacuum heat-insulating plate has been complied with each field insulation demand just, wishes the requirement that the attenuation of warming plate thickness, thermal conductivity reduce.
Summary of the invention
Technical problem to be solved by this invention provides that a kind of thermal conductivity is less, lower-cost core material of vacuum heat insulation plate 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 of 4-20mm fiber elongation method production and 0-30wt%, diameter is 1.0-4um, length is the glass fibre cotton of 1-5mm flame method production.
This core material of vacuum heat insulation plate is arranged to cutting moulding behind the 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 that mixes and the distribution of glass fibre cotton layering isoplanar, most of parallel lamella that constitutes.With respect to the glass fibre core of direct formation desired thickness, the stacked glass fibre core to desired thickness of employing laminated glass fibre sheet material of the present invention, the technique effect that has: be beneficial to vacuum heat-insulating plate and vacuumize, to reduce the thermal conductivity of vacuum heat-insulating plate.
Because the glass chopped silk that fiber elongation method is produced, industrialized production, the industry maturation, efficient 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 of making.Therefore, core material of vacuum heat insulation plate cost of the present invention is low, stable and controllable for quality.
The glass fibre cotton that adopts flame method to make, diameter is thin, length is short, therefore the corresponding glass fibre cotton density that obtains is bigger, and the core material of vacuum heat insulation plate thermal conductivity of making is lower, but if the glass fibre cotton that adopts flame method to produce is separately produced core material of vacuum heat insulation plate, meeting manufacture cost height, and the thermal conductivity that makes the vacuum heat-insulating plate of making is difficult to reach below the 0.0025W/m.k, quality instability, poor controllability; And the glass fibre cotton proportion of producing with flame method in the core material of vacuum heat insulation plate of the present invention is less, in terms of existing technologies, has significantly reduced cost of production, has improved constant product quality.
The making method of above-mentioned core material of vacuum heat insulation plate comprises the steps:
(1) get 70-100wt%, diameter be 6-13um, length be the glass chopped silk of 4-20mm fiber elongation method production and 0-30wt%, diameter is the glass fibre cotton that 1.0-4um, length are produced for the 1-5mm flame method;
(2) above-mentioned two kinds of fiber glass materials are disperseed respectively, then above-mentioned glass chopped silk and glass fibre cotton mixing and water adding are stirred, send into after stirring and join the stock tank thin up, 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, reducing electrostatic effect, and further be beneficial to above-mentioned two kinds of glass fibres and be uniformly dispersed;
(3) will dilute good slurry and send into breast box, the slurries layering that breast box flows out flows on the forming net, is evenly distributed with the negative pressure suction inlet under this forming net, to dewater; Fiber laydown after the dehydration is on described forming net and thickness is even, the layering isoplanar distributes, and most of parallel, forms the lamella of desired thickness, namely obtains glass chopped silk wet plate.
(4) adopt pressure roller that above-mentioned glass fibre wet plate is rolled, make its surfacing, thickness evenly (pressure by the control pressure roller is adjusted the thickness of glass fibre wet plate, and makes glass fibre wet plate consistency of thickness);
(5) the glass fibre wet plate that will finish above-mentioned steps (4) is through dehydration, the dry back formation glass fibre sheet of handling;
(6) to desired thickness, carry out cutting according to production requirement with the laminated glass fibre sheet material is stacked, be made into required core.(with respect to the glass fibre core of direct formation desired thickness, the stacked glass fibre core to desired thickness of employing laminated glass fibre sheet material of the present invention, the technique effect that has: 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.Because making the glass chopped filament diameter of central layer employing is 6-13um, the glass chopped silk that length is produced for the 4-20mm fiber elongation method is so under the pressure condition of 10KPa, described glass fibre sheet blank optimum thickness is 0.5-5mm.
When forming net dewaters to glass fibre cotton in the described step (4), the speed of forming net be 12-30 rice/minute.Adopt this speed can guarantee effectively that glass chopped silk and the cotton wet plate density that makes up produced by forming net are even, marshalling, integral thickness is even relatively, has improved the core material of vacuum heat insulation plate end product quality.
The top surface inclination setting of described forming net; The forming net top is provided with the diversion channel that links to each other with described breast box, and the base plate of this diversion channel is parallel with the end face of described forming net, is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net on the base plate of diversion channel; Described negative pressure suction inlet is oppositely arranged and is distributed in downstream one side of each narrow slit type nozzle respectively with described narrow slit type nozzle, be beneficial to the end face that fiber in the slurries is evenly distributed on described forming net.
As a kind of preferred scheme, described forming net is conveyor type, is beneficial to continuous production.
As further preferred scheme, the feeding direction of described forming net end face is for from bottom to top, be beneficial to fiber laydown on described forming net and thickness evenly, the layering isoplanar distributes, major part is parallel.
Technique effect of the present invention:
1, the glass fibre cotton of the glass chopped silk that employing 70-100wt% fiber elongation method is produced among the present invention and the production of 0-30wt% flame method is as the core material of vacuum heat insulation plate raw material, the core material of vacuum heat insulation plate thermal conductivity of producing is below 0.030W/m.k, its thermal shield thermal conductivity is low with respect to the glass fibre cotton core that adopts the 100wt% flame method to produce, and heat insulation effect is better; The cost of material that the glass chopped silk of fiber elongation method production simultaneously adopts is lower, the manufacture cost of having saved core material of vacuum heat insulation plate greatly; The control of monolithic core thickness is under 0.5-5mm(10kpa pressure), density is controlled at 80kg/m3-200kg/m3, and compression ratio is bigger slightly than the ultra-fine glass cotton core material that adopts the 100wt% flame method to produce, but can big influence not arranged to production technology;
2, core material of vacuum heat insulation plate of the present invention has porous structure, can satisfy the quick exhaust performance that core material of vacuum heat insulation plate possesses;
3, the glass chopped silk of fiber elongation method production has fire-retardant, sound-absorbing among the present invention, characteristic nontoxic, environmental protection makes the vacuum heat-insulating plate using scope of producing extensive;
4, process for integrally manufacturing of the present invention is simple, adapts to industrialized production;
5, the present invention adopts the multilayer liquid feeding, and multilayer vacuumizes, and is that central layer forms internal structure thin and that fiber array is neat, and this structure is conducive to the reduction of core thermal conductivity.
Description of drawings
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, and length is that glass chopped silk and the diameter of 4-20mm fiber elongation method production is 1.0-4.0um, and the glass fibre cotton that length is produced for the 1-5mm flame method is mixed and made into; The glass fibre cotton that described flame method is produced accounts for 20wt%, and the glass chopped silk of described fiber elongation method production accounts for 80wt%, and the core thickness in the vacuum insulation board finished product is 15 ± 1mm, the thermal conductivity≤0.0024W/m.k of the vacuum heat-insulating plate of making.
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 directly is 6-13um, and length is that glass chopped silk and the diameter of 4-20mm fiber elongation method production is 1.0-4um, the glass fibre cotton that length is produced for the 1-5mm flame method; The glass fibre cotton ratio that described flame method is produced is 20wt%, and the glass chopped silk ratio of described fiber elongation method production is 80wt%;
(2) send into after mixing and water adding stirs by a certain percentage with the glass fiber material after two kinds of dispersions and join the stock tank dilution, 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) will dilute good glass fibre slurries sends into and holds stock tank;
(4) slurry that will hold in the stock tank is sent into breast box 2, and the slurries 3 that breast box 2 flows out flow on the forming net 1 by 4 layerings of multilayer nozzle, and forming net 1 below is equipped with the blower fan suction inlet (be negative pressure suction inlet 5) corresponding with nozzle 4 and is carried out layering vacuum dehydration.Fiber laydown after the dehydration forms evenly, arranges orderly lamella at forming net 1, namely makes glass chopped silk wet plate; In this step during the dehydration of the 1 pair of glass fibre slurries of forming net, the speed of forming net 1 be 20-25 rice/minute;
(5) the glass fibre wet plate is laterally rolled, make surfacing, simultaneously the thickness of glass fibre wet plate is adjusted, make glass fibre wet plate thickness be adjusted into 1mm-3mm;
(6) the glass fibre wet plate that will finish shaping phoresys in the line belt of negative pressure of vacuum 60% moisture removal in the glass fibre wet plate, makes the control of glass fibre wet plate water content below 40%;
(7) the glass fibre wet plate that will remove moisture is then sent into baking and curing in the roasting chamber 8, and temperature control is at 250-300 degree centigrade in the roasting chamber 8, and stoving time is 5-20 minute; After finishing, baking forms the fiber glass core sheet material;
(8) laminated glass fibre sheet material lamination is arranged to that whole plate carries out cutting behind the desired thickness according to production requirement, cuts into 600mm * 600mm, namely obtain the core material of vacuum heat insulation plate finished product.
Fig. 1, the top surface inclination setting of described forming net 1; Forming net 1 top is provided with the diversion channel 7 that links to each other with described breast box 2, and the base plate of this diversion channel 7 is parallel with the end face of described forming net 1, is evenly distributed with the vertical narrow slit type nozzle 4 of length direction of a plurality of and described forming net 1 on the base plate of diversion channel 7; Each negative pressure suction inlet 5 is oppositely arranged and is distributed in downstream one side of each narrow slit type nozzle 4 respectively with described narrow slit type nozzle 4, be beneficial to the end face that fiber in the slurries is evenly distributed on 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 production; The feeding direction of forming net 1 end face is for from bottom to top, be beneficial to fiber laydown on described forming net and thickness evenly, the layering isoplanar distributes, most of parallel.
The core material of vacuum heat insulation plate of this example is 6-13um by diameter, and length is that glass chopped silk and the diameter of 4-20mm fiber elongation method production is 1.0-4um, and the glass fibre cotton that length is produced for the 1-5mm flame method is mixed and made into; The glass fibre cotton that described flame method is produced accounts for 10wt%, and the glass chopped silk of described fiber elongation method production accounts for 90wt%, and the core thickness in the vacuum insulation board finished product is 15 ± 1mm, the thermal conductivity≤0.0022W/m.k of the vacuum heat-insulating plate of making.
The making method of the core material of vacuum heat insulation plate of this example, the step that comprises is as follows:
(1) cut-off directly is 6-13um, and length is that glass chopped silk and the diameter of 4-20mm fiber elongation method production is 1.0-4um, the glass fibre cotton that length is produced for the 1-5mm flame method; The glass fibre cotton ratio that described flame method is produced is 10wt%, and the glass chopped silk ratio of described fiber elongation method production is 90wt%;
(2) send into after mixing and water adding stirs by a certain percentage with the glass fiber material after two kinds of dispersions and join the stock tank dilution, diluted concentration is to 0.3-0.5wt% and suitably add hydroxylated cellulose to reduce electrostatic effect;
(3) will dilute good glass fibre slurries sends into and holds stock tank;
(4) slurry that will hold in the stock tank is sent into breast box, and the slurries that breast box flows out flow on the forming net by the layering of multilayer nozzle, and the forming net below is equipped with the blower fan suction inlet corresponding with nozzle and is carried out layering vacuum dehydration.Fiber laydown after the dehydration forms uniform sequential lamella at forming net, just makes glass chopped silk wet plate; When forming net dewaters to glass fibre cotton in this step, the speed of forming net be 20-25 rice/minute;
(5) the glass fibre wet plate is laterally rolled, make surfacing, simultaneously the thickness of glass fibre wet plate is adjusted, make glass fibre wet plate thickness be adjusted into 1mm-3mm;
(6) the glass fibre wet plate that will finish shaping is sent in the line belt of negative pressure of vacuum, with 60% moisture removal in the glass fibre wet plate, makes the control of glass fibre wet plate water content below 40%;
(7) the glass fibre wet plate that will remove moisture is then sent into baking and curing in the roasting chamber 8, and the control of baking the temperature inside the box is at 250-300 degree centigrade, and stoving time is about 5-20 minute; After finishing, baking forms glass fibre sheet;
(8) carry out cutting after according to production requirement laminated glass fibre sheet material lamination being arranged to desired thickness, namely obtain the core material of vacuum heat insulation plate finished product.
Embodiment 3
The core material of vacuum heat insulation plate of present embodiment is 6-13um by diameter, and length is that glass chopped silk and the diameter of 4-20mm fiber elongation method production is 1.0-4um, and the glass fibre cotton that length is produced for the 1-5mm flame method is mixed and made into; The glass fibre cotton that described flame method is produced accounts for 15wt%, and the glass chopped silk of described fiber elongation method production 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 present embodiment, the concrete steps that comprise are as follows:
(1) cut-off directly is 6-13um, and length is that glass chopped silk and the diameter of 4-20mm fiber elongation method production is 1.0-4um, the glass fibre cotton that length is produced for the 1-5mm flame method; The glass fibre cotton ratio that described flame method is produced is 15wt%, and the glass chopped silk ratio of described fiber elongation method production is 85wt%;
(2) send into after mixing and water adding stirs by a certain percentage with the glass fiber material after two kinds of dispersions and join the stock tank dilution, diluted concentration is to 0.6wt% and add hydroxylated cellulose to reduce electrostatic effect;
(3) will dilute good glass fibre cotton slurries sends into and holds stock tank;
(4) slurry that will hold in the stock tank is sent into breast box, and the slurries that breast box flows out flow on the forming net by the layering of multilayer nozzle, and the forming net below is equipped with the blower fan suction inlet corresponding with nozzle and is carried out layering vacuum dehydration.Fiber laydown after the dehydration forms uniform sequential lamella at forming net, just makes glass chopped silk wet plate.When forming net dewaters to glass fibre cotton in this step, the speed of forming net be 20-25 rice/minute;
(5) the glass fibre wet plate is laterally rolled, make surfacing, simultaneously the thickness of glass fibre wet plate is adjusted, make glass fibre wet plate thickness be adjusted into 1-3mm;
(6) the glass fibre wet plate that will finish shaping is sent on the line belt of negative pressure of vacuum 60% moisture removal in the glass fibre wet plate, makes the control of glass fibre wet plate water content 40%;
(7) the glass fibre wet plate that will remove moisture is then sent into baking and curing in the roasting chamber, and the control of baking the temperature inside the box is at 250-300 degree centigrade, and stoving time is about 5-30 minute; After finishing, baking forms glass fibre sheet;
(9) carry out cutting after according to production requirement laminated glass fibre sheet material lamination being arranged to desired thickness, namely obtain the core material of vacuum heat insulation plate finished product.
Claims (9)
1. core material of vacuum heat insulation plate, it is characterized in that comprising mixed-forming: 70-100wt%, diameter be 6-13um, length be the glass chopped silk of 4-20mm fiber elongation method production and 0-30wt%, diameter is the glass fibre cotton that 1.0-4um, length are produced for the 1-5mm flame method.
2. core material of vacuum heat insulation plate as claimed in claim 1 is characterized in that: this core material of vacuum heat insulation plate is arranged to cutting moulding behind the 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 that mixes and the distribution of glass fibre cotton layering isoplanar, most of parallel lamella that constitutes.
3. the making method of a core material of vacuum heat insulation plate comprises the steps:
(1) get 70-100wt%, diameter be 6-13um, length be the glass chopped silk of 4-20mm fiber elongation method production and 0-30wt%, diameter is the glass fibre cotton that 1.0-4um, length are produced for the 1-5mm flame method;
(2) above-mentioned two kinds of glass fibres are disperseed respectively, then above-mentioned glass chopped silk and glass fibre cotton mixing and water adding are stirred, send into after stirring and join the stock tank thin up, diluted concentration is to 0.3-1.0wt%;
(3) will dilute good slurry and send into breast box, the slurries layering that breast box flows out flows on the forming net, is evenly distributed with the negative pressure suction inlet under this forming net, to dewater; Fiber laydown after the dehydration is on described forming net and thickness is even, the layering isoplanar distributes, major part is parallel, forms the lamella of desired thickness, namely obtains glass chopped silk wet plate;
(4) adopt pressure roller that above-mentioned glass fibre wet plate is rolled, make its surfacing, thickness even;
(5) the glass fibre wet plate that will finish above-mentioned steps (4) is through dehydration, the dry back formation glass fibre sheet of handling;
(6) carry out cutting after laminated glass fibre sheet material lamination is arranged to desired thickness, make required core.
4. the making method of core material of vacuum heat insulation plate as claimed in claim 3 is characterized in that: under the pressure condition of 10KPa, the thickness of glass fibre sheet is 0.5-5mm in the described step (5).
5. the making method of core material of vacuum heat insulation plate as claimed in claim 3 is characterized in that: when forming net dewaters to glass fibre cotton in the described step (4), the speed of forming net be 12-30 rice/minute.
6. the making method of core material of vacuum heat insulation plate as claimed in claim 3 is characterized in that: 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.
7. the making method of core material of vacuum heat insulation plate as claimed in claim 3 is characterized in that: the top surface inclination setting of described forming net; The forming net top is provided with the diversion channel that links to each other with described breast box, and the base plate of this diversion channel is parallel with the end face of described forming net, is evenly distributed with the narrow slit type nozzle vertical with the length direction of described forming net on the base plate of diversion channel; Described negative pressure suction inlet is oppositely arranged and is distributed in downstream one side of each narrow slit type nozzle respectively with described narrow slit type nozzle.
8. the making method of core material of vacuum heat insulation plate as claimed in claim 7, it is characterized in that: described forming net is conveyor type.
9. the making method of core material of vacuum heat insulation plate as claimed in claim 8, it 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 |
| CN103836306A (en) * | 2014-03-21 | 2014-06-04 | 茌平县恒康保温材料有限公司 | Glass fiber ultra-low temperature thermal insulation material production technology |
| CN104494235A (en) * | 2015-01-06 | 2015-04-08 | 青岛科瑞新型环保材料有限公司 | Vacuum insulation panel and manufacture method thereof |
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| CN107698272A (en) * | 2017-11-03 | 2018-02-16 | 辽宁科途环保节能材料有限公司 | A kind of vacuum heat-insulating plate composite core material and preparation method thereof |
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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 |
| CN104494235A (en) * | 2015-01-06 | 2015-04-08 | 青岛科瑞新型环保材料有限公司 | Vacuum insulation panel and manufacture method thereof |
| CN105133186A (en) * | 2015-08-31 | 2015-12-09 | 南京航空航天大学 | Method for achieving self-stratification of glass fiber core materials |
| CN107698272A (en) * | 2017-11-03 | 2018-02-16 | 辽宁科途环保节能材料有限公司 | A kind of vacuum heat-insulating plate composite core material and preparation method thereof |
| CN110678331A (en) * | 2018-02-08 | 2020-01-10 | 恩铂锘有限公司 | Method for manufacturing sound absorption panel and sound absorption panel manufactured by the same |
| CN110678331B (en) * | 2018-02-08 | 2021-08-24 | 恩铂锘有限公司 | Method for manufacturing sound absorption panel and sound absorption panel manufactured by the same |
| 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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