CN114211770A - Preparation method of vesicle composite rock wool material and vesicle composite paste spraying system used for same - Google Patents
Preparation method of vesicle composite rock wool material and vesicle composite paste spraying system used for same Download PDFInfo
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- CN114211770A CN114211770A CN202111594580.8A CN202111594580A CN114211770A CN 114211770 A CN114211770 A CN 114211770A CN 202111594580 A CN202111594580 A CN 202111594580A CN 114211770 A CN114211770 A CN 114211770A
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- cotton
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- rock wool
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- 239000011490 mineral wool Substances 0.000 title claims abstract description 52
- 238000005507 spraying Methods 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920000742 Cotton Polymers 0.000 claims abstract description 67
- 150000001875 compounds Chemical class 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 206010011732 Cyst Diseases 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 208000031513 cyst Diseases 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000001723 curing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000004964 aerogel Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- 229910020411 SiO2-x Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000002149 hierarchical pore Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/248—Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board
- B29C67/249—Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board for making articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2103/00—Use of resin-bonded materials as moulding material
- B29K2103/04—Inorganic materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Building Environments (AREA)
Abstract
The invention relates to a preparation method of a cyst composite rock wool material, which comprises the following steps: melting rock wool raw material powder, then fibrillating the melted rock wool raw material powder by a centrifugal machine, blowing the obtained fiber to a cotton collection machine by utilizing compressed air, spraying a binder, folding and cotton-paving cotton filaments captured by the cotton collection machine by a pendulum bob method, and then pressing and forming the cotton filaments; in the process of cotton paving by using a pendulum bob method, a vesicle compound paste spraying device is arranged at the pendulum bob, a layer of vesicle compound paste is coated on the surface of one side of the cotton silk to be folded and cotton paved, and then the cotton silk is mechanically pressed and molded by a press roller; according to the preparation method of the vesicle composite rock wool material, the existence of the plurality of spacing layers with the bonding effect formed by the vesicle composite paste reduces burrs or rock wool dust formed in cutting or installation construction, and is beneficial to the health of workers; the spacing layer also greatly increases the heat conduction path, further weakens the heat convection, also forms more heat shields, further reduces the heat conductivity of the rock wool board.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a vesicle composite rock wool material and a vesicle composite paste spraying system used for the method.
Background
The heat-insulating energy-saving material is the key point of the current building material, the silicon dioxide aerogel is the heat-insulating material with the best performance in the world at present, but the manufacturing cost is high, and the application field is narrower, and the novel material nano mesoporous silicon dioxide continuous aggregate vesicles have similar physicochemical properties with the silicon dioxide aerogel, but the production cost is low, so that the novel material nano mesoporous silicon dioxide continuous aggregate vesicles are more suitable for industrial large-scale production and can be applied to various fields.
The nanometer mesoporous silica continuous aggregate vesicle, referred to as vesicle for short, is a core base material in the field of high-efficiency heat insulation and energy conservation, is white or gray particles in appearance, is a double-shell hollow-bubble continuous aggregate, and has a loose density of 0.01-0.1g/cm3High temperature resistance>Compressive strength at 850 deg.C>10MPa, heat conductivity coefficient less than 0.03W/m.K, vesicle size of 30-100nm, pore size distribution of hierarchical pores, which are divided into 2-4nm wall pores and 20-40nm vesicle pores, pore wall thickness of 4-6nm, specific surface area of 600-1100 m-2The chemical structure of the vesicle is SiO2-x (x = 0.4-0.8).
The vesicle compound paste is a main form in practical application of vesicles, and is a high-efficiency heat-insulating energy-saving material prepared by compounding vesicles serving as a basic main material with organic and inorganic adhesives, superfine fibers and other materials. The heat conductivity coefficient of the paste heat-insulating material is less than 0.05W/m.K, the construction processes such as blade coating, spraying and the like can be realized, and the paste heat-insulating material is applied to the surfaces of regular/irregular equipment such as plastics, metals and the like.
When the heat insulation and energy saving material is used, rock wool heat insulation material has to be lifted; the production of rock wool is characterized by that it adopts high-quality basalt and dolomite as main raw materials, and adopts the processes of melting at high temp. above 1450 deg.C, high-speed centrifuging by adopting four-roller centrifugal machine to form fibre, at the same time spraying a certain quantity of adhesive, dust-proofing oil and water repellent, collecting by using cotton-collecting machine, utilizing pendulum process, and laying cotton by three-dimensional method, then solidifying and cutting so as to form the rock wool products with different specifications and uses.
Rock wool is easy to fluff and bur due to cutting and other reasons in the production, construction and installation processes, and the burs are adhered on a human body to cause discomfort and rock wool dust harmful to a respiratory system; in addition, rockwool has a high hygroscopicity, and water tends to accumulate in the rockwool panel, which may cause the rockwool panel to fall off due to its own weight over a long period of time.
Disclosure of Invention
The invention aims to provide a composite product combining vesicle composite paste and rock wool so as to further improve the performance of a rock wool board.
In order to solve the technical problem, the invention discloses a preparation method of a cyst composite rock wool material, which comprises the following steps:
crushing rock wool raw materials, putting the crushed rock wool raw materials into a submerged arc furnace, melting the crushed rock wool raw materials, fibrillating the crushed rock wool raw materials by a four-roller centrifugal machine, blowing the obtained fibers to a cotton collecting machine by utilizing compressed air, spraying a binder, folding and paving cotton by a pendulum bob method, mechanically pressing and forming the folded cotton fibers by a compression roller, conveying the pressed cotton fibers to a curing furnace for drying and curing, cutting the cotton fibers according to a specified size, and cutting edges to obtain a rock wool board; in the process of cotton paving by using a pendulum bob method, a vesicle compound paste spraying device is arranged at the pendulum bob, a layer of vesicle compound paste is coated on the surface of one side of the cotton silk to be folded and cotton paved, and then the cotton silk is mechanically pressed and molded by a press roller;
the vesicle compound paste spraying device sprays a layer of vesicle compound paste on the cotton wire which is about to slide out of the pendulum bob, then the cotton wire slides out of the pendulum bob and is folded under the drive of the pendulum bob, and then the cotton wire is conveyed into a press roller machine through a conveying belt.
A vesicle compound paste spraying system for a preparation method of a vesicle compound rock wool material comprises a vesicle compound paste spraying device and a vesicle compound paste feeding device; the pendulum bob is provided with a downward outlet, the pendulum bob swings in a reciprocating manner, and the cotton silk falls onto the conveying belt through the outlet in a folding manner; one side wall in the cotton silk paste outlet captured by the cotton collection machine slides out, and the vesicle compound paste spraying device is arranged on the other side wall in the outlet.
Preferably, the vesicle compound paste spraying device comprises a nozzle, and the nozzle uniformly sprays a layer of film-shaped paste to the surface of the cotton silk at a constant flow rate.
Preferably, the thickness of the film-like paste discharged from the nozzle is 0.5 to 2 mm.
Preferably, the vesicle compound paste feeding device comprises a conveying hose and a storage box, wherein one end of the conveying hose is communicated with the storage box, and the other end of the conveying hose penetrates through the pendulum bob to be connected with the vesicle compound paste spraying device.
Preferably, the viscosity of the vesicle compound paste in the storage box is adjusted, so that the vesicle compound paste can be smoothly sprayed out from the nozzle, and the sprayed vesicle compound paste can be attached to the surface of the cotton silk without dripping.
Preferably, the spout is duckbilled.
The preparation method of the vesicle composite rock wool material at least has the following advantages:
1. due to the existence of a plurality of spacing layers with bonding effect formed by the vesicle compound paste, burrs or rock wool dust formed in cutting or installation construction is reduced, and the health of workers is facilitated.
2. The spacing layer formed by the bubble composite paste layers in the rock wool board greatly increases the heat conduction path, further weakens heat convection, and also forms more heat shields, which are beneficial to further reducing the heat conductivity of the rock wool board.
3. A plurality of wall intervals that the rock wool board formed in also be favorable to strengthening the holistic compressive strength of rock wool board to can reduce the holistic hydroscopicity of rock wool board, dampproofing effect is better.
Drawings
Fig. 1 is a schematic front view structure diagram of a composite bubble paste spraying system, wherein an arc line with double arrows is a swinging direction of a pendulum bob.
Fig. 2 is a schematic side view of the composite paste spray system of the bladder of fig. 1.
The reference numbers in the figures are: the device comprises a 1-vesicle compound paste spraying device, 101-nozzles, a 2-vesicle compound paste feeding device, 201-conveying hoses, 202-a storage box, 3-a pendulum bob, 4-an outlet, 5-cotton threads, 6-a conveying belt and 7-a press roller machine.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," when used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
A preparation method of a cyst composite rock wool material comprises the following steps:
crushing rock wool raw materials, putting the crushed rock wool raw materials into a submerged arc furnace, melting the crushed rock wool raw materials, fibrillating the crushed rock wool raw materials by a four-roller centrifugal machine, blowing the obtained fibers to a cotton collecting machine by utilizing compressed air, spraying a binder, folding and paving cotton by a pendulum bob method, mechanically pressing and forming the folded cotton fibers by a compression roller, conveying the pressed cotton fibers to a curing furnace for drying and curing, cutting the cotton fibers according to a specified size, and cutting edges to obtain a rock wool board; in the process of cotton paving by using a pendulum bob method, a vesicle compound paste spraying device is arranged at the pendulum bob, a layer of vesicle compound paste is coated on the surface of one side of the cotton silk to be folded and cotton paved, and then the cotton silk is mechanically pressed and molded by a press roller; in the drying and curing process, each layer of vesicle compound paste is cured between two layers of silk floss;
the vesicle compound paste spraying device sprays a layer of vesicle compound paste on the cotton wire which is about to slide out of the pendulum bob, then the cotton wire slides out of the pendulum bob and is folded under the drive of the pendulum bob, and then the cotton wire is conveyed into a press roller machine through a conveying belt.
Example 2
As shown in fig. 1-2, a vesicle compound paste spraying system for a preparation method of vesicle compound rock wool material comprises a vesicle compound paste spraying device 1 and a vesicle compound paste feeding device 2; the pendulum bob 3 is provided with a downward outlet 4, the pendulum bob swings in a reciprocating way, and cotton fibers 5 fall onto a conveyor belt 6 after being folded through the outlet; one side wall in the cotton silk paste outlet captured by the cotton collection machine slides out, and the vesicle compound paste spraying device is arranged on the other side wall in the outlet.
The vesicle compound paste spraying device comprises a nozzle 101, wherein a layer of film-shaped paste is uniformly sprayed to the surface of cotton silk by the nozzle at a constant flow rate.
The thickness of the film-shaped paste sprayed out from the nozzle is 0.5-2 mm. The thickness of the film-shaped paste body is not suitable to be too large, otherwise the volume weight of the finished rock wool board is obviously increased, and the cost is not easy to control.
The vesicle compound paste feeding device comprises a conveying hose 201 and a storage box 202, wherein one end of the conveying hose is communicated with the storage box, and the other end of the conveying hose penetrates through a pendulum bob to be connected with a vesicle compound paste spraying device.
The viscosity of the vesicle compound paste in the storage box is adjusted, so that the vesicle compound paste can be smoothly sprayed out from the nozzle, and the sprayed vesicle compound paste can be attached to the surface of the cotton yarn without dripping. The over-diluted vesica compound paste is not only easy to drip to cause unevenness, but also causes more vesica compound paste to enter pores among cotton threads, and a more complete spacing layer is difficult to form. Under a proper spraying pressure, the vesicle compound paste with a proper viscosity can form a film on the surface of the cotton silk in a short time (the cotton silk sent out from the pendulum is a layer of arranged and loose layered cotton), the cotton silk is quickly folded under the driving of the pendulum after being sent out from the pendulum outlet, and then is pressed by the compression roller machinery 7, and during pressing, the folded part at one side of the cotton silk is actually pressed together by the double-layer vesicle compound paste, so that a complete spacing layer can be further formed. It is worth pointing out that the viscosity of the vesicle compound paste is finely adjusted according to different seasons and different temperatures.
The nozzle is duckbilled.
Example 3
Compared with the common rock wool board without the vesicle compound paste, the heat conductivity coefficient of the common rock wool board is about 0.044W/m.K, but the rock wool board with the vesicle compound paste has the advantages that the heat resistance is reduced, the heat conductivity coefficient can be as low as 0.041W/m.K or even lower, in addition, the moisture resistance of the product is better (compared with the common non-hydrophobic rock wool board) due to a plurality of spacing layers, the vesicle compound paste can play a part of a bonding role, and the using amount of glue can be properly reduced in production.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (7)
1. A preparation method of a cyst composite rock wool material is characterized by comprising the following steps:
crushing rock wool raw materials, putting the crushed rock wool raw materials into a submerged arc furnace, melting the crushed rock wool raw materials, fibrillating the crushed rock wool raw materials by a four-roller centrifugal machine, blowing the obtained fibers to a cotton collecting machine by utilizing compressed air, spraying a binder, folding and paving cotton by a pendulum bob method, mechanically pressing and forming the folded cotton fibers by a compression roller, conveying the pressed cotton fibers to a curing furnace for drying and curing, cutting the cotton fibers according to a specified size, and cutting edges to obtain a rock wool board; in the process of cotton paving by using a pendulum bob method, a vesicle compound paste spraying device is arranged at the pendulum bob, a layer of vesicle compound paste is coated on the surface of one side of the cotton silk to be folded and cotton paved, and then the cotton silk is mechanically pressed and molded by a press roller;
the vesicle compound paste spraying device sprays a layer of vesicle compound paste on the cotton wire which is about to slide out of the pendulum bob, then the cotton wire slides out of the pendulum bob and is folded under the drive of the pendulum bob, and then the cotton wire is conveyed into a press roller machine through a conveying belt.
2. A vesicle compound paste spraying system used in the preparation method of the vesicle compound rock wool material according to claim 1 is characterized by comprising a vesicle compound paste spraying device and a vesicle compound paste feeding device; the pendulum bob is provided with a downward outlet, the pendulum bob swings in a reciprocating manner, and the cotton silk falls onto the conveying belt through the outlet in a folding manner; one side wall in the cotton silk paste outlet captured by the cotton collection machine slides out, and the vesicle compound paste spraying device is arranged on the other side wall in the outlet.
3. The vesicular composite paste spray system of claim 2, wherein the vesicular composite paste spray device comprises a nozzle which uniformly sprays a layer of film-like paste onto the surface of the cotton silk at a constant flow rate.
4. The vesicular composite paste spray system of claim 4, wherein the thickness of the membranous paste ejected from the nozzle is 0.5-2 mm.
5. The vesicle compound paste spraying system according to claim 2, wherein the vesicle compound paste feeding device comprises a conveying hose and a storage box, one end of the conveying hose is communicated with the storage box, and the other end of the conveying hose passes through the pendulum bob to be connected with the vesicle compound paste spraying device.
6. The vesicular composite paste spraying system according to claim 5, wherein the viscosity of the vesicular composite paste in the storage tank is adjusted so that the vesicular composite paste can be smoothly sprayed from the nozzle, and the sprayed vesicular composite paste can be attached to the surface of cotton silk without dripping.
7. The vesicular composite paste spray system of claim 3, wherein the nozzle is duckbilled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111594580.8A CN114211770A (en) | 2021-12-24 | 2021-12-24 | Preparation method of vesicle composite rock wool material and vesicle composite paste spraying system used for same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111594580.8A CN114211770A (en) | 2021-12-24 | 2021-12-24 | Preparation method of vesicle composite rock wool material and vesicle composite paste spraying system used for same |
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| CN114211770A true CN114211770A (en) | 2022-03-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394741A (en) * | 2021-12-24 | 2022-04-26 | 新华盛节能科技股份有限公司 | Production process of vesicle heat-insulating powder composite rock wool material |
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| CN101792149A (en) * | 2010-03-16 | 2010-08-04 | 南开大学 | Spherical silicon dioxide hollow material and preparation method thereof |
| EP2340930A1 (en) * | 2009-12-23 | 2011-07-06 | Paroc Oy Ab | Mineral fibre composite product and method for manufacturing it |
| EP2574693A1 (en) * | 2011-09-27 | 2013-04-03 | Rockwool International A/S | Method of producing an insulating element made of mineral fibres and insulating element made of mineral fibres |
| CN106795991A (en) * | 2014-07-22 | 2017-05-31 | 旭玻璃纤维股份有限公司 | Inorganic fibrous insulating material |
| CN111303633A (en) * | 2020-03-12 | 2020-06-19 | 新华盛节能科技股份有限公司 | Method for preparing silicone rubber sponge heat-insulating material by taking in-situ graft modified mesoporous silica vesicle continuous aggregate as functional filler |
| CN111559883A (en) * | 2020-06-15 | 2020-08-21 | 万华建筑科技（烟台）有限公司 | Preparation method of silica aerogel modified rock wool board |
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2021
- 2021-12-24 CN CN202111594580.8A patent/CN114211770A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2340930A1 (en) * | 2009-12-23 | 2011-07-06 | Paroc Oy Ab | Mineral fibre composite product and method for manufacturing it |
| CN101792149A (en) * | 2010-03-16 | 2010-08-04 | 南开大学 | Spherical silicon dioxide hollow material and preparation method thereof |
| EP2574693A1 (en) * | 2011-09-27 | 2013-04-03 | Rockwool International A/S | Method of producing an insulating element made of mineral fibres and insulating element made of mineral fibres |
| CN106795991A (en) * | 2014-07-22 | 2017-05-31 | 旭玻璃纤维股份有限公司 | Inorganic fibrous insulating material |
| CN111303633A (en) * | 2020-03-12 | 2020-06-19 | 新华盛节能科技股份有限公司 | Method for preparing silicone rubber sponge heat-insulating material by taking in-situ graft modified mesoporous silica vesicle continuous aggregate as functional filler |
| CN111559883A (en) * | 2020-06-15 | 2020-08-21 | 万华建筑科技（烟台）有限公司 | Preparation method of silica aerogel modified rock wool board |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394741A (en) * | 2021-12-24 | 2022-04-26 | 新华盛节能科技股份有限公司 | Production process of vesicle heat-insulating powder composite rock wool material |
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