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Various Electromagnetic Protective Clothing
Electromagnetic Shielding Materials
For human bodyMGnet
Japan Patent No. 392205 / US Patent No. US6.855.883.B1
Reflects high frequency electromagnetic waves
ＭＧ(Microwave Guard)net
- ・Blocks high frequency electromagnetic waves (100kHz to several tens of GHz)
- ・Anti-static (static)
- ・High durability (resistant to bending and friction)
- ・High light transmittance, breathability, and heat dissipation
- ・Ultra-lightweight (20g/㎡)
- ・Conductive rust prevention processing (performance maintained for more than 2 years)
- ・Long fibers reduce the production of fluff and dust
- ・Won't fray even when cut
- 1.MGnet 2 layers
- 2.High frequency electromagnetic waves
- 3.Electromagnetic wave reflection
Silver fiber (nylon99.9% pure silverIt is a material made by weaving nylon fiber (coated with 1.0% mercury) into a special honeycomb mesh (mesh size of about 1 mm), and combines the properties of nylon fiber (lightweight and flexible), silver (conductivity, electromagnetic shielding, antibacterial properties), and honeycomb mesh (durability, translucency, ventilation, and heat dissipation). It is also treated with conductive rust prevention to prevent deterioration of the silver fiber.
specification
| Part number | MGNET-010 | ||
|---|---|---|---|
| Fabric width x thickness x length | 105cm x 0.2mm x approx. 80m | ||
| Weight (unit weight) | 20g／㎡ | ||
| material | Substrate | Nylon Fiber | |
| Coating Materials | Silver (99.9% purity) | ||
| Electromagnetic shielding properties (KEC method) | 1Electromagnetic wave shielding (KEC method)00kHz～1000kHz | 1 piece | 21.5～23.7dB |
| 4 pieces | 23.2～51.9dB | ||
| 1000kHz～3GHz | 1 piece | 23.7～30.8dB | |
| 4 pieces | 51.9～61.3dB | ||
| Electromagnetic wave shielding (Free Space Method) |
4.5MHz～1.4GHz | 1 piece | 30～40dB |
| 4 pieces | 47～60dB | ||
| 7.75GHz～13GHz | 1 piece | 20～40dB | |
| 4 pieces | 40～60dB | ||
| Heat resistance | －30～200℃ | ||
| Durability (shielding performance) Opened or unopened from airtight bag |
After opening | Performance drops by 20-30% in one year | |
| Unopened | Maintains performance for over 10 years | ||
| Conductivity Surface resistance (Ω/10×10cm) | Vertical | 1.4Ω | |
| Horizontal | 3.3Ω | ||
| Antibacterial (Staphylococcus aureus) SEK standard *Unified test method Antibacterial properties for human use only | Viable cell count | Under 20 | |
| Bacteriostatic activity value | 5.8 and above | ||
| Bactericidal activity value | 3.1 or higher | ||
| Silver ion elution test MGnet 0.1g and 5g in 1L Tap water※When put into Silver ion concentration over time The changes were tested. ※Simulated tap water made by mixing ultrapure water with sodium hypochlorite ●The concentration of silver ions increases in proportion to the amount of water and the surface area of the silver. |
0.1g/liter Area: Approx. 0.003㎡ Silver surface area: approx. 0.9㎡ |
1 hour | 70ppb |
| 8 hour | 108ppb | ||
| 24 hour | 133ppb | ||
| 5g/liter Area: approx. 0.15㎡ Silver surface area: approx. 45㎡ |
1 minute | 117ppb | |
| 5 minute | 211ppb | ||
| 10 minute | 230ppb | ||
■ Price: We are currently suspending sales of materials. If you would like to purchase processed products, please contact us.
Electromagnetic Shielding Data
KEC method electric field shielding data
This is the electric field shielding data (in dB: decibels) when 1 to 4 MGnet sheets are stacked for each frequency.※99% at 40dB, 99.9% at 60dBIt has a shielding performance of .If you want to completely block your mobile phone from receiving signals, you will need a shielding performance of 40dB or more, so please use MGnet tripled or more.
▲Comparison of shielding performance against near-field electric fields by overlapping MGnets (KEC method): Measurement Limit indicates the measurement limit value. It can be seen that overlapping MGnets improves shielding performance against high-frequency electromagnetic waves from 1 MHz to 2.5 GHz from 20 dB to 60 dB.
KEC method for measuring electric field shielding
Comparison of electromagnetic shielding performance by overlapping MGnets
A comparison was made of the electromagnetic wave shielding performance of overlapping MGnets. The shielding performance against near electric fields was measured using the KEC method as shown on the right. The results are shown in the table and graph above. These results show that overlapping MGnets improves the shielding performance against high frequency electromagnetic waves from 1MHz to 2.5GHz.Measurement method for shielding effectiveness against near electric fields using the KEC method (Figure 1)
(Figure 1)
Free space method electric field shielding data
This is the electric field shielding data (dB: decibel unit) when 1 to 6 sheets of MGnet are stacked for each frequency. Shielding performance evaluation of MGnet in each frequency band was carried out by HVS Technologies, Inc. (a specialized institution for electromagnetic absorption shielding materials and test equipment attached to the Electro-Acoustic Research Center) in the United States. As a result, electromagnetic wave shielding performance was confirmed with a shielding rate of 30 to 40 dB or more at frequencies of 0.045 GHz to 1.4 GHz, and a shielding rate of 20 to 40 dB or more at frequencies of 7.75 GHz to 13.0 GHz. Details are shown in Table 2.
| Measurement Facility | HVS Technologies, Inc. (A US-based company specializing in electromagnetic absorption shielding materials and test equipment, affiliated with the Electroacoustic Research Center) |
|---|---|
| Measurer | Prof. Vijay K. Varadan (Center for Electroacoustic Materials and Device Engineering, Pennsylvania State University, USA) |
| Electromagnetic wave shielding material used | MGnet |
| Measuring Equipment | HVS Free Space Microwave Measurement System |
| How to Measure | Measurement of electromagnetic wave absorption rate and transmission attenuation rate of MGnet using HVS Free Space Microwave Measurement System |
| Measurement results |
|
Millimeter wave shielding test data ※Click to enlarge
Metal allergy is a condition in which the skin reacts to metals and chloride ions contained in sweat, causing a rash. Silver is a safe metal that is extremely unlikely to cause allergic reactions. Most common electromagnetic shielding materials use inexpensive metal plating such as nickel. Nickel dissolves more easily than other metals when it comes into direct contact with the skin, and if you sweat, it dissolves even more easily due to the action of chloride ions in sweat, so care must be taken.
Our "MGnet" products are designed with safety and intended use in mind, and are coated with silver to minimize the risk of metal allergies. Also, unlike general products that have electromagnetic shielding material coated on the fabric, "MGnet" products are silver coated at the fiber level, making them resistant to abrasion and peeling of the coating material and durable.
Nickel "Material Safety Data Sheet"
| Human health hazards of nickel | |
|---|---|
| Respiratory sensitization | Category 1 |
| Skin sensitivity | Category 1 |
| Carcinogenicity | Category 2 |
| Specific target organ toxicity (single exposure) | Category 1(Respiratory system/kidneys) |
| Specific target organ toxicity (repeated exposure) | Category 2(Respiratory System) | Environmental hazards of nickel |
| Chronic toxicity to the aquatic environment | Category 4 | Environmental hazards of nickel |
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