Electromagnetic Shielding Material
Special materials for EMC countermeasures ＭＧnet
Electromagnetic wave shielding material for EMC measures that provides moderate shielding against high frequency electromagnetic waves
made in Japan
"MGnet" for EMC countermeasures is a special material made by weaving silver fiber (nylon coated with 99.9% pure silver), which is also used in various electromagnetic wave protective clothing, into a honeycomb (hexagonal) mesh (mesh size approximately 1 mm) and then applying a special coating (conductive rust prevention processing).
It is highly durable and its shielding performance does not deteriorate even after repeated folding or washing.When ordinary shielding mesh or sheet materials are folded, the metal parts peel off or break, causing the performance to deteriorate. In addition, silver fibers that are not treated with conductive rust prevention will deteriorate in performance within about a year due to sulfurization and chlorination.
MGnet has an electromagnetic wave blocking performance of approximately 20dB or more with a single layer, 35dB or more with a double layer, 40dB or more with a triple layer, and 50dB or more with a quadruple layer, and the shielding performance can be adjusted according to the application.
Materials with too high a shielding performance (80 dB or more) can cause large reflections and have unexpected effects on equipment.※
※High reflectivity of high frequency electromagnetic waves may have a large effect on other devices.
- ・Diffusion of reflected electromagnetic waves：Materials with high reflectivity scatter electromagnetic waves over a wide area, and surrounding equipment may be affected by the reflected electromagnetic waves.
- ・Electromagnetic Interference (EMI)：Reflected electromagnetic waves can enter other electronic devices or systems, causing electromagnetic interference and disrupting the normal operation of those devices.
- ・Increasing complexity of the electromagnetic environment：Reflected electromagnetic waves are scattered in multiple directions, complicating the electromagnetic environment and increasing the risk of electromagnetic interference occurring in unexpected places, making it difficult to predict the effects on specific equipment or systems.
- ・Reduced shielding effectiveness：When a material with high reflectivity is used, re-radiation or resonance of electromagnetic waves occurs, the expected shielding effect cannot be obtained, and control of electromagnetic waves becomes difficult.
Example: Malfunction verification test of electromagnetic wave protective clothing (CES protector) for capsule endoscopes
- In developing electromagnetic wave protective clothing for capsule endoscopes, protective clothing was created using MGnet 2-layer (approximately 40 dB) and MGnet 4-layer (approximately 60 dB) materials, and the capsule endoscope antenna was installed in seven locations on various parts of a human dummy. The capsule endoscope was embedded in the abdomen, and the person wearing each protective clothing was irradiated with electromagnetic waves in the frequency band of the telemeter. The distance at which an error occurred was measured by bringing the antenna closer.
- ・MGnet 2-layer (approx. 40 dB)：There was no variation in the distance at which errors occurred depending on the position of the seven antennas. The distance at which errors occurred was reduced almost uniformly.
- ・MGnet 4-layer (approx. 60 dB)：The distance at which errors occurred varied depending on the positions of the seven antennas, and errors occurred even from far away depending on the antenna position.
- For details, please refer to the following documents.
- Comparative study of the effects of MGnet 2-layer (approximately 40 dB) and 4-layer (approximately 60 dB) on capsule endoscopes
【Features】
- "MGnet" is a material that combines the lightness and flexibility of nylon fiber with the electrical conductivity and electromagnetic shielding properties of silver, and is used in a wide variety of electromagnetic wave countermeasures. It also has the diverse functions of silver, such as electrical conductivity, radiation and heat storage effects, thermal conductivity, and antibacterial properties.
- ・Blocks high frequency electromagnetic waves (100kHz to several tens of GHz)
- ・Anti-static (static)
- ・High durability (resistant to bending and friction, washable)
- ・Conductive rust-proofing ensures performance is maintained for more than 2 years (approximately 5 years)
- ・The mesh has an opening rate of over 80%, providing excellent light transmission, breathability, and heat dissipation.
- ・Ultra-lightweight（20g／㎡）
- ・Long fibers reduce the production of fluff and dust
【Applications】
- ・As a noise countermeasure for medical and industrial equipment caused by RF communication waves such as Wi-Fi and 5G
- ・Because it is resistant to bending and friction, it is used as a material for shielding tents, bags, and electromagnetic wave protective clothing, which require durability.
- ・It can be easily cut and sewn, and can be washed repeatedly, making it suitable as a material for various types of electromagnetic wave protection clothing.
- ・Highly conductive, making it suitable for use as a material for antistatic products
- ・Since it does not produce fluff or dust, it can be used as a shielding sheet in clean rooms, operating rooms, and spacecraft.
Electromagnetic wave countermeasures (EMI countermeasures)
MGnet is a fabric with a soft texture, yet at 10 to 2500MHz, it provides shielding performance of more than 20dB (attenuation rate of 90%) with a single sheet, and more than 50dB (attenuation rate of 99.9%) with four sheets stacked.※If the shielding performance is too high, the effects of reflection and resonance may become greater, which may increase electromagnetic interference with the DUT or other equipment.※MGnet can adjust the shielding performance according to the situation.
Anti-static (static)
It has low electrical resistance and is effective in preventing static electricity (electrostatic buildup). This prevents the adhesion of dust and cigarette smoke, and reduces the deterioration of equipment performance. It also makes regular cleaning easier.
High durability - overwhelmingly superior compared to other materials!
MGnet's honeycomb mesh has a structure of interlocking loops, so the silver on the surface will not peel off even if it is bent or twisted. In addition, it has a special conductive anti-rust treatment, so it is resistant to rust, discoloration, and deterioration, so it can maintain its performance for more than two years. By using the genuine coating spray for maintenance, it can maintain its performance for more than five years.
Highly versatile
It is lightweight and has excellent transparency, elasticity, heat dissipation, breathability, and portability, making it highly versatile and allowing for many uses depending on your ideas.
Environmental Considerations
MGnet is extremely light. Metal plates used as shielding materials require a lot of heat energy during manufacturing and recycling, and because they are heavy, they consume a lot of energy during transportation, which leads to increased CO2 emissions. On the other hand, we collect used MGnet products and have a processor recycle the silver.
| Part number | MGNET-010EB | ||
|---|---|---|---|
| Fabric width x thickness x length | 105cm×0.2mm×About 80m | ||
| Weight (unit weight) | 20g／㎡ | ||
| material | Substrate | Nylon Fiber | |
| Coating Materials | Silver (99.9% purity) | ||
| Conductive rust prevention processing | Acrylic and tin | ||
| Electromagnetic wave shielding (KEC method) | 100kHz～1000kHz | 1 piece | 21.5～23.7dB |
| 4 layers | 23.2～51.9dB | ||
| 1000kHz～3GHz | 1 piece | 23.7～30.8dB | |
| 4 layers | 51.9～61.3dB | ||
| Electromagnetic wave shielding (Free Space Method) |
4.5MHz～1.4GHz | 1 piece | 30～40dB |
| 4 layers | 47～60dB | ||
| 7.75GHz～13GHz | 1 piece | 20～40dB | |
| 4 layers | 40～60dB | ||
| Heat resistance | －30～200℃ | ||
| Durability (shielding performance) Opened or unopened from airtight bag |
After opening | 2-year warranty (performance maintained for about 5 years) | |
| Unopened | Maintains performance for over 10 years | ||
Conductivity Surface resistance （Ω/10×10cm） |
Vertical | 1.4Ω | |
| Horizontal | 3.3Ω | ||
| Breathability (unit：㎤/㎠/sec） Measure how much air (cm3) passes through each square meter of each test piece per second. |
1 piece | ８３％ | |
| 2 layers | ７７％ | ||
| 3 layers | ６７％ | ||
| 4 layers | ６１％ | ||
| Visible light 320nm to 780nm transmittance Measure how much light passes through when MGnets are overlapped |
1 piece | ７４％ | |
| 2 layers | ５５％ | ||
| 3 layers | ４１％ | ||
| 4 layers | ３１％ | ||
Price list (excluding tax)
We will cut to your desired size (in 10cm increments) and supply it in rolls or sheets.
※Minimum order quantity is 1m (domestic shipping included). Discounts will be given for orders over 10m depending on the quantity (please contact us for details).
| Part number | type | Sales price (excluding tax) |
|---|---|---|
| MGNET-010EB | 1050mm×80m Random | 24,000yen／ｍ |
Information on maintenance products
MG Conductive Anti-rust Spray330ml
Features
Maintenance supplies to maintain performance. Conductive anti-rust coating prevents deterioration of silver fibers. Contains tin for electrical conductivity.
・Supports EMCsheet, electromagnetic shielding bag, EMCbox, EMCtent, and EMC simple room
component
| Stock solutioncomponent | CAS number |
|---|---|
| Acetate esters | 141-78-6 |
| Isopropanol | 67-63-0 |
| Ethylene glycol monobutyl ether | 111-76-2 |
| Acrylic resin solution | 104609-24-7 |
| Conductive material | Tin |
How to use
Make sure the area is well ventilated, check the direction of the nozzle, hold the can 20-30cm away, shake the can vigorously about 10 times, and spray thinly and evenly over the entire surface. You can use the same method for up to 4 layers, but it is more efficient to spray in layers. After spraying, leave the can to dry indoors for about 1-2 hours.
Spray Time One can can spray for 270 to 300 seconds
The spray time varies depending on the area as follows:
20cm×20cm（400c㎡）Spray Time1～1.5秒
30cm×30cm（900c㎡）Spray Time2～3秒
40cm×40cm（1600c㎡）Spray Time4～5秒
50cm×50cm（2500c㎡）Spray Time6～7秒
Frequency of use
For shielding bags and sheets that are touched daily, spray once every three months. For tents and shielding boxes that are not touched, spray after the first year and then use once within the next two years; the product's performance will hardly deteriorate even after five years or more.
※Spray frequency varies depending on usage.
Purchase Information
▼Telephone enquiries▼
TEL 0725-53-3270
※Please be careful not to enter the wrong number.
●Reception hours: Monday to Friday 9:00 to 17:00 (excluding New Year's holidays and public holidays)