Electromagnetic Shielding Material
Countermeasures against low-frequency magnetic fields and static magnetic fields EMSsheet（Patent pending）
Low-frequency magnetic field/static magnetic field shielding material (new material)
made in Japan
An ultra-thin adhesive sheet material with excellent shielding performance against low-frequency magnetic fields and static magnetic fields.
This product has broadband shielding performance, from static magnetic fields to millimeter waves (28 GHz or higher) high frequency electromagnetic waves.
It is considered difficult to shield low-frequency magnetic fields and static magnetic fields in the range of several kHz to several MHz generated by devices such as switching power supplies, motors, and transformers. However, this product achieves high shielding performance (the highest level among thin materials) by layering conductive and magnetic materials.
Furthermore, stacking multiple EMSsheetNH improves magnetic field shielding performance.
●EMSsheetWH (with holes) has almost the same static magnetic field and low-frequency magnetic field shielding performance as EMSsheetNH above. The 1MHz to 6GHz high-frequency electromagnetic wave shielding performance is suppressed to 45 to 48dB.
Materials with too high a shielding performance (80dB or more) can cause large reflections and have unexpected effects on equipment.
If you want to reduce mutual interference (EMC) caused by RF communication waves such as Wi-Fi, please select EMSsheetWH.
▲ Enlarged cross-sectional view (magnification: 8x)
Conductive film + magnetic film + conductive film + adhesive sheet laminated sheet (thickness 0.4 mm + release paper 0.2 mm)
EMSsheetNH
EMSsheetWH
【Features】
- ・It has high performance in a wide range of magnetic and electric fields, from static magnetic fields to millimeter waves of 28 GHz and above.
- ・Can be freely processed, including cutting, folding, joining, and pasting (adhesive sheet pre-processed)
- ・Lightweight and thin (thickness 0.4mm + release paper 0.2mm, weight 380-420g/㎡)
- ・Shielding performance improves when EMSsheet is laminated (easy to do as it comes with an adhesive sheet)
- ・A wide range of processing is possible, from attaching to circuit boards and components to large building materials such as walls, floors, and ceilings.
- ・EMSsheetWH (with holes) has a high-frequency electromagnetic wave shielding performance of 45 to 48 dB for the range of 1 MHz to 6 GHz, and is less susceptible to reflections and resonance. ▶ High reflectivity of high frequency electromagnetic waves increases the impact on other devices.
【Uses - Common】
- ・Because it is thin, it can be used as a low-frequency magnetic field shielding material for products with thickness and weight restrictions.
- ・As a countermeasure against 50/60Hz AC current and 150Hz, 250Hz, 350Hz, etc. harmonic noise generated by high-voltage transmission lines, transformers, switchboards, power cables, etc.
- ・As a countermeasure against inverter-driven motor noise in the range of several kHz to several tens of kHz generated by EVs, robots, air conditioners, elevators, etc.
- ・Compliant with high EMI standards where attenuation by magnetic layers alone is insufficient
- ・As a material for shielded rooms and shielded boxes that have the ability to shield not only high-frequency electromagnetic waves but also low-frequency magnetic fields such as power supply noise.
- ・Noise suppression from AC-DC and DC-DC converters
- ・As a magnetic shielding material to prevent noise from the power supply that may affect the audio circuits of devices
- ・As a low-frequency magnetic field shielding material mounted on circuit boards
【Applications - EMSsheetWH (with holes) EMC measures against RF communication waves such as Wi-Fi】
- In addition to being used as a low-frequency magnetic field shielding material as described above, it can also be used as an EMC countermeasure material against RF communication waves such as Wi-Fi.
- ・When performing wireless automatic control in automobile factories, warehouses, etc., by placing it on the wall where electromagnetic waves are expected to penetrate, it is possible to prevent interference with adjacent factory lines and electromagnetic interference from devices such as Wi-Fi.
- ・By placing them on the walls, ceilings, floors, etc. of your office, you can prevent interference between adjacent rooms and electromagnetic interference.
- ※If low-frequency magnetic field shielding is not required, select "EMCscreen".
- → RF communication wave countermeasure material「EMCscreen」
Low-frequency magnetic field countermeasures (EMI countermeasures)
Conventional measures against low-frequency magnetic fields required thick steel plates or thick absorbers, but EMSsheet is thin and lightweight at 0.4mm thick. It is effective against noise from AC/DC power supplies and power systems, and can be used for large structures by butting EMSsheets together and connecting them with aluminum tape. It has high shielding performance over a wide frequency range from static magnetic fields to GHz. Please see here for details on shielding performance.
高耐久性
The magnetic material is sandwiched between PET films to make a sheet, and aluminum film is attached to both sides of the sheet, with one side being adhesive. It is resistant to discoloration and deterioration, and will last a long time. In an environment where it is not worn out, it will maintain its performance for over 10 years.
Highly versatile
It is lightweight, portable, and can be cut or folded with scissors to suit your needs on the spot, making it highly versatile and usable for many different purposes depending on your ideas. It is long and has an adhesive sheet, so it can be easily attached to structures such as walls, ceilings, and floors. It is also used for small parts such as magnetic head covers for card readers.
Difference between EMSsheetNH and EMSsheetWH
| Part number：BESM-NH | Part number：BESM-WH（Punching process） |
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| Performance：It blocks low-frequency magnetic fields from 100Hz to 1kHz by 27 to 30dB, and electromagnetic waves from 1MHz to 28GHz or higher by 80 to 100dB or more. It has high shielding performance in all frequency bands. Applications：Wall materials for electromagnetic wave shielding rooms that can also shield magnetic fields, areas around motors in electric and hybrid cars, parts for low-frequency magnetic field countermeasures, inner and outer walls of anechoic chambers, and for improving the power transmission efficiency of wireless power supply. |
Performance：It blocks low-frequency magnetic fields of 100Hz to 1kHz by 23 to 30dB, and electromagnetic waves of 1MHz to 6GHz by 45 to 48dB. It has moderate shielding performance in the high-frequency band, and is less susceptible to reflection and resonance. Applications：Inner and outer walls of research and laboratories to prevent low-frequency magnetic fields generated by motors, etc. and interference with communication waves such as Wi-Fi. |
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１．Adhesive sheet (acrylic) x 1 layer ※You can cut it freely with scissors and bend it as you like. |
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【Please be careful!】
EMSsheet is not a material that absorbs and dissipates magnetic fields. It is a material that shields magnetic fields by diverting them. Depending on the placement and shape, the human body or equipment may be exposed to strong magnetic fields, so please understand this before using it. If you have any questions about placement or usage, please contact us.
EMSsheet Specifications
| Part number | BESM-NH（No holes）/BESM-WH（With holes） | ||
|---|---|---|---|
| Width x thickness x length | 460mm×0.4mm+Release paper0.2mm x 50m random | ||
| weight | BESM-NH | 420g／㎡（Release paperContains 50g） | |
| BESM-WH | 380g／㎡（Release paperContains 45g） | ||
| material | Conductive Film | aluminum | |
| Magnetic Film | Magnetic composite material + PET film | ||
| Adhesive | acrylic | ||
| Electromagnetic wave shielding | BESM-NH | Static magnetic field | Approximately 12 dB |
| 100Hz～1kHz | 27～30dB | ||
| 1kHz～300kHz | 30～50dB | ||
| 1MHz～28GHz以上 | 80～Over 100dB | BESM-WH | Static magnetic field | Approximately 12 dB |
| 100Hz～1kHz | 23～30dB | ||
| 1kHz～300kHz | 30～45dB | ||
| 1MHz～6GHz | 45～48dB | ||
| Surface Resistance | 0.1Ω（100mm interval）→ Choose EMSpanel when insulation is required | ||
| Recommended operating temperature range | -30～200℃ | ||
| Durability | More than 10 years in indoor environments, 2-year manufacturer's warranty | ||
Price list (excluding tax)
We will cut to your desired size (in 1m increments) and supply it in rolls.
※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 | Width x Length | type | Sales price (excluding tax) |
|---|---|---|---|
| BESM-NH | 460mm×50m Random | No holes | 48,000yen／ｍ |
| BESM-WH | 460mm×50m Random | With holes | 50,000yen／ｍ |
Since it is rolled, it may be curved or wrinkled, but it will become flat when applied.
Some wrinkles may remain, but this will not affect performance.
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)