CN116646722A - Composite electromagnetic shielding radome and manufacturing method thereof - Google Patents
Composite electromagnetic shielding radome and manufacturing method thereof Download PDFInfo
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- CN116646722A CN116646722A CN202310889690.XA CN202310889690A CN116646722A CN 116646722 A CN116646722 A CN 116646722A CN 202310889690 A CN202310889690 A CN 202310889690A CN 116646722 A CN116646722 A CN 116646722A
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- metal conductive
- skin
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- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 151
- 229910052751 metal Inorganic materials 0.000 claims abstract description 77
- 239000002184 metal Substances 0.000 claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000012790 adhesive layer Substances 0.000 claims abstract description 6
- 238000013329 compounding Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims description 24
- 239000002313 adhesive film Substances 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 22
- 229920006332 epoxy adhesive Polymers 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 22
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 239000006260 foam Substances 0.000 claims description 18
- 229920001187 thermosetting polymer Polymers 0.000 claims description 18
- 239000006261 foam material Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 9
- 230000001680 brushing effect Effects 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229920007790 polymethacrylimide foam Polymers 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000007650 screen-printing Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
- H01Q1/424—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material comprising a layer of expanded material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The composite electromagnetic shielding radome comprises a concave mask blank, wherein the concave mask blank comprises a skin layer, an adhesive layer and a sandwich layer; the skin layers comprise an upper skin layer and a lower skin layer; the metal paste conductive layer is compounded on the upper skin layer. The manufacturing method comprises the steps of firstly completing the manufacture of the radome blank, and then compounding a metal paste conducting layer on the surface of the radome blank. The invention has the following advantages: 1. the weight is light, and is reduced by more than 60 percent compared with the weight of the traditional metal shielding structure; 2. the shielding effectiveness is excellent, and the shielding effectiveness reaches more than 70dB in the wide frequency range of 1MHz-40 GHz; 3. the environmental adaptability is strong, and the method is suitable for multiple environments such as high and cold, damp, ocean and the like; 4. the plastic is high, various shapes can be manufactured through the tooling die, the process is simple and convenient, and the consistency is good.
Description
Technical Field
The invention relates to an electromagnetic shielding radome, in particular to a composite material electromagnetic shielding radome and a manufacturing method thereof.
Background
With the change of the current battlefield situation and the continuous breakthrough of the technical limit of advanced electronic systems and communication equipment in the national defense industry, the informatization of weaponry equipment becomes more and more important, so that more and more radar antennas are applied to the equipment, and the use environment of each radar antenna is more and more severe. In order to ensure that the radar antenna can work normally in a complex electromagnetic environment without interfering with other devices and without being affected by the interference of other devices, the radar antenna must be designed to resist electromagnetic interference.
At present, a metal shell or a cover plate is added at the rear end of the radar antenna in a conventional way, and the method can achieve a good electromagnetic shielding effect. However, due to the adoption of the traditional metal materials, the environment-friendly adaptability is general, the weight is heavy, and a great weight load is brought to the whole equipment platform. In many applications, such as on-board platforms, weight is a very important technical indicator. How to develop an electromagnetic shielding radome with light weight, good environmental resistance and good shielding effectiveness is a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a composite electromagnetic shielding radome.
The invention adopts the following technical scheme: the mask comprises a concave mask body blank, wherein the concave mask body blank comprises a skin layer, an adhesive layer and a sandwich layer; the skin layers comprise an upper skin layer and a lower skin layer; the metal paste conductive layer is compounded on the upper skin layer; the metal paste conductive layer is formed by compounding metal paste on the upper skin layer in a brushing, spraying or silk-screen mode; the metal conductive paste is prepared by mixing metal powder and thermosetting resin.
The principle is as follows: the metal paste conducting layer compounded on the upper skin layer replaces the metal shell of the conventional radar antenna, and the electromagnetic shielding effect is excellent. The skin layer material can be made of thermosetting resin and reinforcing fibers, and the reinforcing fibers can be one or more of glass fibers, carbon fibers, aramid fibers and the like; the sandwich layer material can be aramid paper honeycomb, aluminum honeycomb or PMI foam material; the bonding layer material can be epoxy resin, cyanate resin or phenolic resin; the metal powder may be particles of gold, silver, copper, aluminum or iron; the thermosetting resin can be epoxy resin, cyanate resin or phenolic resin.
An improvement is that the sandwich also comprises a reinforced sandwich layer and a reinforced skin layer. This is a reinforced multi-layer structure.
Another problem to be solved by the present invention is to provide a method for manufacturing an electromagnetic shielding radome made of a composite material.
A preparation method of a composite electromagnetic shielding radome comprises the following steps:
step 1, material and die preparation: preparing release paper, sandwich layer foam materials, skin materials, epoxy adhesive films, cover body forming molds, cutting tools, metal conductive materials and thermosetting resins;
step 2, cutting the skin and sandwich layer foam blank: cutting an upper skin layer blank and a lower skin layer blank by using a skin material according to the overall size of the concave mask body, and cutting a sandwich layer foam blank by using a sandwich layer foam material;
step 3: and (3) forming and curing the concave mask blank: sequentially paving release paper, a lower skin layer blank, an epoxy adhesive film, a sandwich layer foam blank, an epoxy adhesive film and an upper skin layer blank on a cover body forming die according to corresponding areas, paving a porous isolating film, an air-permeable felt and a vacuum bag film, vacuumizing, heating and curing, and controlling the temperature to be 120-180 ℃; the time is 3-6 hours; adding external pressure of 0.1-0.5MPa;
step 4: preparing metal conductive slurry: selecting a proper metal conductive material according to specific shielding index requirements of a shielding radome, grinding the metal conductive material to micron-sized metal powder particles, and uniformly mixing the metal conductive material with thermosetting resin to prepare metal conductive paste;
step 5: secondary curing: and (3) brushing, spraying or silk-screen printing the prepared metal conductive paste on the concave cover blank, and then performing secondary curing at 120-180 ℃ for 3-6 hours.
For the reinforced multi-layer structure provided with a reinforced sandwich layer and a reinforced skin layer, the preparation method comprises the following steps:
step 1, material and die preparation: preparing release paper, sandwich layer foam materials, skin materials, epoxy adhesive films, cover body forming molds, cutting tools, metal conductive materials and thermosetting resins;
step 2, cutting the skin and sandwich layer foam blank: cutting an upper skin layer blank, a lower skin layer blank and a reinforced skin layer blank by using skin materials according to the overall size of the concave mask body, and cutting a sandwich layer foam blank and a reinforced sandwich layer blank by using PMI foam materials;
step 3: and (3) forming and curing the concave mask blank: sequentially paving release paper, a reinforced skin layer blank, an epoxy adhesive film, a reinforced sandwich layer blank, an epoxy adhesive film, a lower skin layer blank, an epoxy adhesive film, a sandwich layer foam blank, an epoxy adhesive film and an upper skin layer blank on a cover body forming die according to corresponding areas, paving a porous isolating film, an airfelt and a vacuum bag film, vacuumizing, heating and curing at 120-180 ℃; the time is 3-6 hours; adding external pressure of 0.1-0.5MPa;
step 4: preparing metal conductive slurry: selecting a proper metal conductive material according to specific shielding index requirements of a shielding radome, grinding the metal conductive material to micron-sized metal powder particles, and uniformly mixing the metal conductive material with thermosetting resin to prepare metal conductive paste;
step 5: secondary curing: and (3) brushing, spraying or silk-screen printing the prepared metal conductive paste on the concave cover blank, and then performing secondary curing at 120-180 ℃ for 3-6 hours.
The invention has the following advantages: 1. the weight is light, and is reduced by more than 60 percent compared with the weight of the traditional metal shielding structure; 2. the shielding effectiveness is excellent, and the shielding effectiveness reaches more than 70dB in the wide frequency range of 1MHz-40 GHz; 3. the environment resistance adaptability is strong, and the environment protection type solar energy storage battery can adapt to various use environments such as high and cold, humid, marine environments and the like; 4. the plastic is high, various shapes can be manufactured through the tooling die, the process is simple and convenient, and the consistency is good.
Drawings
Fig. 1 is a schematic perspective view of an antenna housing according to the present invention.
Fig. 2 is a schematic cross-sectional view of a first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structure of a second embodiment of the present invention.
In the figure: the adhesive comprises a skin layer 1, an adhesive layer 2, a sandwich layer 3, a metal paste conducting layer 4, an upper skin layer 11, a lower skin layer 12, a reinforced sandwich layer 13 and a reinforced skin layer 14.
Description of the embodiments
Examples
As shown in fig. 1 and 2, a composite electromagnetic shielding radome comprises a concave mask body blank, wherein the concave mask body blank comprises a skin layer 1, an adhesive layer 2 and a sandwich layer 3; the skin layer 1 comprises an upper skin layer 11 and a lower skin layer 12; the metal paste conductive layer 4 is compounded on the upper skin layer 11; the metal paste conductive layer 4 is formed by compounding metal paste on the upper skin layer 11 in a brushing, spraying or silk-screen mode; the metal conductive paste is prepared by mixing metal powder (silver is used as one embodiment) with thermosetting resin.
A preparation method of a composite electromagnetic shielding radome comprises the following steps:
step 1, material and die preparation: preparing release paper, sandwich layer foam materials, skin materials, epoxy adhesive films, cover body forming molds, cutting tools, metal conductive materials (silver is used as one embodiment) and thermosetting resins;
step 2, cutting the skin and sandwich layer foam blank: cutting an upper skin layer blank (an upper skin layer 11) and a lower skin layer blank (a lower skin layer 12) by using a skin material according to the overall size of the concave mask body, and cutting a sandwich layer foam blank (a sandwich layer 3) by using a sandwich layer foam material;
step 3: and (3) forming and curing the concave mask blank: sequentially paving release paper, a lower skin layer blank (lower skin layer 12), an epoxy film (bonding layer 2), a sandwich layer foam blank (sandwich layer 3), an epoxy film (bonding layer 2) and an upper skin layer blank (upper skin layer 11) on a cover body forming die according to corresponding areas, paving a porous isolating film, an airfelt and a vacuum bag film, vacuumizing, heating and curing, and controlling the temperature to be 120-180 ℃; the time is 3-6 hours; adding external pressure of 0.1-0.5MPa;
step 4: preparing metal conductive slurry: silver metal is selected as a metal conductive material, and then the metal conductive material is ground into micron-sized metal powder, and the micron-sized metal powder and thermosetting resin are uniformly mixed to prepare metal conductive paste;
step 5: secondary curing: and (3) silk-screen printing the prepared metal conductive paste on the concave cover blank, and then performing secondary curing at the temperature of 150 ℃ for 3 hours.
Examples
As shown in fig. 1 and 3, the present embodiment is a reinforced multi-layer structure provided with a reinforcing sandwich layer 5 and a reinforcing skin layer 6.
A composite electromagnetic shield radome, comprising a concave radome blank comprising a skin layer 1, an adhesive layer 2 and a sandwich layer 3 (PMI foam material); the skin layers include an upper skin layer 11 and a lower skin layer 12; the metal paste conductive layer 4 is compounded on the upper skin layer 11; the metal paste conductive layer 4 is formed by compounding metal paste on the upper skin layer 11 in a brushing, spraying or silk-screen mode; the metal conductive paste is prepared by mixing metal powder (aluminum is used as one embodiment) with thermosetting resin.
A preparation method of a composite electromagnetic shielding radome comprises the following steps:
step 1, material and die preparation: preparing release paper, PMI foam material, skin material, epoxy adhesive film, cover body forming die, cutting tool, metal conductive material (aluminum) and thermosetting resin;
step 2, cutting the skin and sandwich layer foam blank: cutting an upper skin layer blank (an upper skin layer 11), a lower skin layer blank (a lower skin layer 12) and a reinforced skin layer blank (a reinforced skin layer 14) by using skin materials according to the overall size of the concave mask body, and cutting a sandwich layer foam blank (a sandwich layer 3) and a reinforced sandwich layer blank (a reinforced sandwich layer 13) by using PMI foam materials;
step 3: and (3) forming and curing the concave mask blank: sequentially paving release paper, a reinforced skin layer blank (reinforced skin layer 14), an epoxy adhesive film (bonding layer 2), a reinforced sandwich layer blank (reinforced sandwich layer 13), an epoxy adhesive film (bonding layer 2), a lower skin layer blank (lower skin layer 12), an epoxy adhesive film (bonding layer 2), a sandwich layer foam blank (sandwich layer 3), an epoxy adhesive film (bonding layer 2) and an upper skin layer blank (upper skin layer 11) on a cover body forming die according to corresponding areas, paving a porous isolating film, an airfelt and a vacuum bag film, vacuumizing, heating and curing at 120-180 ℃; the time is 3-6 hours; adding external pressure of 0.1-0.5MPa;
step 4: preparing metal conductive slurry: selecting aluminum metal as a metal conductive material, grinding the metal conductive material to micron-sized metal powder, and uniformly mixing the metal conductive powder with thermosetting resin to prepare metal conductive paste;
step 5: secondary curing: and spraying the prepared metal conductive slurry on the concave cover blank, and then performing secondary curing at the temperature of 150 ℃ for 6 hours.
The present invention is not limited to the specific structure of the above embodiment, and the manufacturing method is not limited to the specific steps of the above method, and equivalent transformation of other similar structures and similar methods fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a combined material electromagnetic shield radome which characterized in that: the mask comprises a concave mask body blank, wherein the concave mask body blank comprises a skin layer, an adhesive layer and a sandwich layer; the skin layers comprise an upper skin layer and a lower skin layer; the metal paste conductive layer is compounded on the upper skin layer; the metal paste conductive layer is formed by compounding metal paste on the upper skin layer in a brushing, spraying or silk-screen mode; the metal conductive paste is prepared by mixing metal powder and thermosetting resin.
2. A composite electromagnetic shielding radome of claim 1, wherein: also included are a reinforcing sandwich layer and a reinforcing skin layer.
3. The method for manufacturing the electromagnetic shielding radome made of the composite material according to claim 1, comprising the following steps:
step 1, material and die preparation: preparing release paper, sandwich layer foam materials, skin materials, epoxy adhesive films, cover body forming molds, cutting tools, metal conductive materials and thermosetting resins;
step 2, cutting the skin and sandwich layer foam blank: cutting an upper skin layer blank and a lower skin layer blank by using a skin material according to the overall size of the concave mask body, and cutting a sandwich layer foam blank by using a sandwich layer foam material;
step 3: and (3) forming and curing the concave mask blank: sequentially paving release paper, a lower skin layer blank, an epoxy adhesive film, a sandwich layer foam blank, an epoxy adhesive film and an upper skin layer blank on a cover body forming die according to corresponding areas, paving a porous isolating film, an air-permeable felt and a vacuum bag film, vacuumizing, heating and curing, and controlling the temperature to be 120-180 ℃; the time is 3-6 hours; adding external pressure of 0.1-0.5MPa;
step 4: preparing metal conductive slurry: selecting a proper metal conductive material according to specific shielding index requirements of a shielding radome, grinding the metal conductive material to micron-sized metal powder particles, and uniformly mixing the metal conductive material with thermosetting resin to prepare metal conductive paste;
step 5: secondary curing: and (3) brushing, spraying or silk-screen printing the prepared metal conductive paste on the concave cover blank, and then performing secondary curing at 120-180 ℃ for 3-6 hours.
4. The method for manufacturing the electromagnetic shielding radome made of the composite material according to claim 2, comprising the following steps:
step 1, material and die preparation: preparing release paper, sandwich layer foam materials, skin materials, epoxy adhesive films, cover body forming molds, cutting tools, metal conductive materials and thermosetting resins;
step 2, cutting the skin and sandwich layer foam blank: cutting an upper skin layer blank, a lower skin layer blank and a reinforced skin layer blank by using skin materials according to the overall size of the concave mask body, and cutting a sandwich layer foam blank and a reinforced sandwich layer blank by using PMI foam materials;
step 3: and (3) forming and curing the concave mask blank: sequentially paving release paper, a reinforced skin layer blank, an epoxy adhesive film, a reinforced sandwich layer blank, an epoxy adhesive film, a lower skin layer blank, an epoxy adhesive film, a sandwich layer foam blank, an epoxy adhesive film and an upper skin layer blank on a cover body forming die according to corresponding areas, paving a porous isolating film, an airfelt and a vacuum bag film, vacuumizing, heating and curing at 120-180 ℃; the time is 3-6 hours; adding external pressure of 0.1-0.5MPa;
step 4: preparing metal conductive slurry: selecting a proper metal conductive material according to specific shielding index requirements of a shielding radome, grinding the metal conductive material to micron-sized metal powder particles, and uniformly mixing the metal conductive material with thermosetting resin to prepare metal conductive paste;
step 5: secondary curing: and (3) brushing, spraying or silk-screen printing the prepared metal conductive paste on the concave cover blank, and then performing secondary curing at 120-180 ℃ for 3-6 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310889690.XA CN116646722A (en) | 2023-07-20 | 2023-07-20 | Composite electromagnetic shielding radome and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310889690.XA CN116646722A (en) | 2023-07-20 | 2023-07-20 | Composite electromagnetic shielding radome and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN116646722A true CN116646722A (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310889690.XA Pending CN116646722A (en) | 2023-07-20 | 2023-07-20 | Composite electromagnetic shielding radome and manufacturing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN116646722A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117141012A (en) * | 2023-10-31 | 2023-12-01 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
| CN117141012B (en) * | 2023-10-31 | 2024-05-24 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
-
2023
- 2023-07-20 CN CN202310889690.XA patent/CN116646722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117141012A (en) * | 2023-10-31 | 2023-12-01 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
| CN117141012B (en) * | 2023-10-31 | 2024-05-24 | 廊坊市飞泽复合材料科技有限公司 | Foam material reinforcing method |
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