Talk about what is shielding material?

EMI Series electromagnetic shielding material introduction:
　　The wave absorbing material, also known as [noise suppression sheet/magnetic sheet/electromagnetic wave absorber /Flexield], is a flexible magnetic sheet made of magnetic materials and resins; It can suppress the radiation noise generated by electronic devices in the frequency range of a wide band, absorb electromagnetic interference (EMI) and convert into heat dissipation
　　Anti-interference absorbing material can effectively reduce the direct electromagnetic wave, reflection, diffraction and surface wave radiation in the wide band, reliability, stability, free and convenient coating, strong adhesion, long life, it can eliminate the electromagnetic wave reflection in the shielding cavity, reduce the interference of clutter to its own equipment, but also effectively prevent electromagnetic radiation to the surrounding equipment and personnel harassment and damage. It is an advanced means to eliminate electromagnetic wave pollution. The application of wave-absorbing materials in electronic equipment can absorb the leaked electromagnetic radiation, which can achieve the purpose of eliminating electromagnetic interference.
　　EMI series electromagnetic shielding material is made of polymer filled with absorbing medium that can effectively dissipate electromagnetic waves. It has a good absorption attenuation effect from 10 MHZ to gigahertz interference noise. It can eliminate the electromagnetic wave reflection in the equipment cavity and reduce the interference of clutter to its own equipment. It also effectively prevents electromagnetic radiation from harassing and harming surrounding equipment and personnel, and is an advanced means to eliminate electromagnetic wave pollution.
　　This frequency band covers most of the civilian consumer electronics clutter frequency band or high harmonic frequency band, when due to design or process reasons, even if the use of electromagnetic shielding, filtering, grounding and other technologies and means, sometimes it is difficult to achieve the desired effect, do not need to make any changes to the design and process, just find the source of interference with this material paste or fixed on it. You can solve some EMC/EMI problems that shielding means can't solve.

1. Application
　　Used in electronic equipment can absorb leaked electromagnetic radiation, can achieve the purpose of eliminating electromagnetic interference. According to the law of electromagnetic wave propagation in the medium from low magnetic direction to high permeability direction, the use of high permeability ferrite to guide electromagnetic wave, through resonance, a large amount of radiation energy of electromagnetic wave, and then through the coupling of electromagnetic wave energy into heat.
　　In NFC/RFID equipment, the electronic tag to be integrated or attached to the product, as a component of the device function, often due to limited space, it is inevitable to attach the electronic tag (usually passive) on the surface of conductive objects such as metals or in the vicinity of metal devices. In this way, the alternating electromagnetic field induced by the label under the action of the signal sent by the card reader is easily affected by the eddy current attenuation of the metal, which greatly weakens the signal strength, resulting in the failure of the reading process. Therefore, it is necessary to add anti-metal materials and wave absorbing materials in the product to improve the sensitivity of card reading.
　　Absorbing materials are used in all kinds of electronic products, such as TV, LED display, audio, VCD player, computer, digital camera, game console, microwave oven, mobile phone, can make electromagnetic wave leakage to the national health safety limit (10 microwatts per square centimeter) below, to ensure human health. It can be used in high power radar, microwave darkroom, microwave medical equipment, microwave crusher, electronic compatible absorption shielding, which can protect operators from electromagnetic radiation damage.
　　Daily applications such as smart payment mobile phones, POS machines, all kinds of smart cards, RFID radio frequency cards, RFID readers, card readers, all kinds of intelligent access control, WIF, antennas, etc
　　Frequency range: 110KHz ~ 5GHz
　　Specific gravity: ≤3 ~ 4.0g /cm3
　　Operating temperature: -25℃~125℃
　　Relative humidity: ≤95%
　　Safety: non-toxic, tasteless, halogen-free, non-corrosive, friendly to people and the environment.
　　Absorbent material adaptability: strong adhesion, anti-vibration, anti-corrosion, anti-ultraviolet radiation, anti-aging performance.