Pingxiang Volmet Import&Export Trading Co., Ltd. 萍乡市沃美特进出口贸易有限公司
Conductive nylon Shielding screen for epoxy resin components
Short Description:
Application:As we all know, there must be a tiny air gap between the insulating parts and the mounting plate in the medium voltage switchgear, and the field strength of this small air gap will far exceed the breakdown field strength of the air, and a discharge phenomenon will occur in the small air gap. The charged particles overflow from the air gap and distort the original electric field after reaching the interface, thereby reducing the flashover voltage and reducing the reliability of the insulating parts. Therefore, the existence of this small air gap must be eliminated. In high-voltage products, the shielding ring is cast and encapsulated in the matching insulating parts such as wall bushings and contact boxes. At the same time, the high-voltage or ground is connected to the shielding ring respectively, and the high-voltage or ground is introduced into the epoxy parts, which can effectively It can effectively eliminate the small air gap between the epoxy and its installation board, achieve the purpose of uniform electric field, and improve the insulation strength and life of the product.
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Conductive nylon Shielding screen for epoxy resin components Application
As we all know, there must be a tiny air gap between the insulating parts and the mounting plate in the medium voltage switchgear, copper screen stainless screen for epoxy resin bushing is necessary,and the field strength of this small air gap will far exceed the breakdown field strength of the air, and a discharge phenomenon will occur in the small air gap. The charged particles overflow from the air gap and distort the original electric field after reaching the interface, thereby reducing the flashover voltage and reducing the reliability of the insulating parts. Therefore, the existence of this small air gap must be eliminated. In high-voltage products, the shielding ring is cast and encapsulated in the matching insulating parts such as wall bushings and contact boxes. At the same time, the high-voltage or ground is connected to the shielding ring respectively, and the high-voltage or ground is introduced into the epoxy parts, which can effectively It can effectively eliminate the small air gap between the epoxy and its installation board, achieve the purpose of uniform electric field, and improve the insulation strength and life of the product.
Pressure Equalizing Ring Series, copper screen for bushing ,Stainless steel screen for bushing products
Conductive nylon Shielding screen photos
Application for Conductive nylon Shielding screen:
The shielding net made of nylon and carbon fiber composite combines the advantages of two materials, with the characteristics of lightweight, high strength, corrosion resistance and electromagnetic shielding, and is mainly used in the following fields:
1. Electromagnetic shielding (EMI/RFI Shielding)
Electronic equipment protection: used for precision instruments, communication equipment (such as 5G base stations), medical equipment, etc., to prevent electromagnetic interference (EMI) or radio frequency interference (RFI).
Widely used in the power industry, especially when die-casting sleeves with APG epoxy resin equipment
2. Structural reinforcement and lightweight
Industrial parts: As a reinforcement layer for epoxy resin sleeves and composite materials, it improves mechanical strength and reduces weight (lighter than metal mesh).
3. Anti-static and conductive applications
Petroleum/chemical equipment: Replace metal mesh in flammable environments to avoid spark risks and export static electricity.
4. Special environment protection
High temperature parts: The high temperature resistance of carbon fiber is suitable for engine peripheral parts (need to be combined with high temperature resistant resin).
Advantages compared to traditional metal shielding mesh
Features Nylon+Carbon Fiber Screen Metal shielding mesh (such as stainless steel/brass)
Weight Extremely light (low density) Heavier
Corrosion resistance Excellent (no rust or oxidation) Surface treatment is required for rust prevention
Electromagnetic shielding effectiveness Medium (can meet general EMI requirements) High (metal is better)
Mechanical strength High tensile strength High but easy to fatigue
Cost Higher Lower
The role and use of epoxy bushing stainless steel shielding net mainly include the following aspects:
Electromagnetic shielding: The stainless steel shielding net can effectively shield electromagnetic interference, prevent the influence of external electromagnetic waves on the internal circuit, and prevent the electromagnetic waves generated internally from radiating outward, protecting electronic equipment from electromagnetic interference
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Protective effect: Epoxy sleeve combined with stainless steel shielding net can provide additional protection to prevent leakage or short circuit of cables when passing through walls, ensuring the safe operation of equipment
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Improve production efficiency: The APG process is used in one-piece molding during the production process, which can balance the pressure inside the mold, shorten the production cycle to about 1 hour, and significantly improve production efficiency
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Quality assurance: Through the one-piece molding process, the quality of the epoxy sleeve produced can be guaranteed to be higher and meet higher quality standards
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Specific application scenarios Subway, high-speed rail, automotive wiring harness: Stainless steel shielding net sleeves are widely used in these fields to play a role of protection and shielding
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Industrial components: used to protect precision optical scale circuits, industrial sensors, electronic equipment circuits, etc., providing dust, rust, pressure, tension, and wear protection
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High-voltage equipment: In high-voltage equipment, epoxy sleeves combined with stainless steel shielding nets can effectively shield electromagnetic fields and ensure stable operation of the equipment
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Pressure Equalizing Ring Features
Electromagnetic shielding mesh conductive mesh yarn is made of nickel, copper and nickel film layers on the PET flexible mesh base material by vacuum magnetron sputtering coating process and composite coating process to make nickel mesh, and it can also be composited with ferrous metal. Forms a flexible black stainless steel wire mesh. Electromagnetic shielding mesh has good electrical conductivity, light transmission performance, flexibility and stability, and is suitable for the production of various electronic shielding products. Electromagnetic shielding mesh conductive mesh product use: PDP plasma TV frame. EMI shielding materials for PDP front panel Various EMI shielding display windows, EMI shielding materials, optical filters, EMI shielding nets.
According to different materials, the shielding nets include copper shielding nets, nickel shielding nets, aluminum shielding nets, stainless steel shielding nets, etc.
Depending on the process, the shielding mesh includes square-hole braided shielding mesh, diamond-shaped hole stretched shielding mesh, and punching shielding mesh.
1. Basic specifications of braided shielding net:
Mesh: 20-200 mesh
Wire diameter: 0.05-0.2 mm
Aperture: 0.07-2mm
Net width: 1m, 1.2m, 1.5m, 1.8m, 2m.
Net length: 30 meters, 50 meters, 100 meters.
Special specifications can be customized.
2. Basic specifications of stretch shielding net:
Mesh thickness: 0.1-5mm
Diamond mesh: 0.3X0.6mm, 0.5X1mm, 0.6X1.2mm, 0.8X1.6mm, 1X2mm, 1.25X2.5mm, 1.5X2mm, 2X2.5mm, 1.5X3mm, 2X3mm, 2X4mm, 3X6mm, 4X8mm, 5X10mm, 6X12mm , 8X16mm, 10X20mm, 15X30mm, 20X40mm, 30X60mm and other specifications.
Shielding net application: It is mainly used for radiation protection in special cable circuits, laboratories, computer rooms and other special facilities. Electromagnetic interference prevention of electronic equipment, power sector, aerospace, information industry, military facilities, etc.
1. Electromagnetic waves are composed of a changing electric field and a changing magnetic field. The changing magnetic field produces an electric field, and the changing electric field produces a magnetic field. The two are indispensable, otherwise they cannot propagate.
2. The material of the metal mesh is conductive metal. When the electric field in the air is formed around the metal mesh, the formation of the electric field is destroyed due to the short-circuit effect of the conductive metal (ideally, the resistance of the conductive medium is zero, and the electric field is completely disappeared by the short circuit).
3. Based on the above two points, after the electromagnetic wave reaches the metal mesh area, the electric field disappears, and the magnetic field cannot continue to be generated, thus cutting off the continuous propagation of the electromagnetic wave.
4. If the metal mesh is a closed system, electromagnetic waves cannot enter the closed system, thus forming a shielding effect. If the metal mesh is not a closed system, due to the diffraction effect of electromagnetic waves, some electromagnetic waves still bypass the metal mesh to enter, and the shielding effect is very high. Difference.
5. In fact, if the metal mesh is not grounded, after the electric field reaches the area, it can still form an electric field on the ground and form new electromagnetic waves. Therefore, the metal mesh is grounded and the shielding effect is better.
