EMI Absorber 3M Substitute material

Wave-absorbing material is a noise-reduction magnetic film made of soft magnetic powder and resin in a certain proportion.It has high permeability and soft sides covered with double-sided tape.Just paste it in the right position and it has excellent noise suppression.


Main components of Penghui RMS120 series EMI absorber pieces by iron based alloy soft magnetic powder and environmental friendly polymer materials through a series of complex production process (iron based alloy soft magnetic powder production raw material check ingredients crushing forming tape cutting inspection packaging delivery); Penghui is one of the few enterprises in China from the source of magnetic powder production to rapid and stable molding, and then to the absorption of customized processing one-stop.


The initial magnetic permeability of the RMS120 series of wave absorption films is 120, It also has a high magnetic loss, with good absorption effect and electromagnetic loss performance of 10Mhz-6Ghz, ultra-thin thickness can bring good electromagnetic absorption loss effect, the RMS120 series of wave-absorbing films, thin est 0.05mm, commonly used unadhesive thickness including 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.5mm, used to solve laptops, mobile phones, communication cabinets, vehicle devices, wearable devices, Intelligent equipment, EMI problems arising between the internal cavity of medical devices, GPS, chips, flash memory, FPC wiring, batteries, and components.


The loss mechanism of the wave-absorbing chip can be roughly divided into the following three categories:

  1. Resistance loss, such absorption mechanism and the conductivity of the material, that is, the greater the conductivity, the greater the macroscopic current caused by the carrier (including the current caused by the electric field change and the vortex caused by the magnetic field change), which is conducive to the conversion of electromagnetic energy into thermal energy.
  2. Dielectric loss, it is a kind of related and electrode dielectric loss absorption mechanism, namely through the medium repeatedly polarization “friction” the electromagnetic energy into thermal energy dissipation, dielectric polarization process includes: electronic cloud shift polarization, polar dielectric moment to polarization, electric domain to polarization and wall displacement, etc.
  3. Magnetic loss, such absorption mechanism is a kind of magnetic loss related to the dynamic magnetization process of ferromagnetic media, such loss can be refined into: hysteresis loss, magnetic vortex current, damping loss and magnetic afterthought effect, its main sources are similar to the magnetic domain steering, magnetic domain wall displacement and magnetic domain natural resonance.


RMS120 series wave absorption film appearance structure


 RMS120 series absorbing film features

  1. Made of high-magnetic conductivity sheet-shaped micro-fine iron-based alloy soft magnetic powder + environmental protection polymer material through the flow extension process, the thickness of 0.05mm-0.5mm;
  2. Temperature-resistant double-sided adhesive with high reliability according to customer needs, which is easy for customers to use directly;
  3. The Broadband (10Mhz-6Ghz) has the absorption effect, with the better use effect at 500Mhz-2Ghz;
  4. The surface is smooth, smooth, do not drop powder, not rotten edge, not conductive, non-toxic and environmental protection, with toughness;
  5. Can improve the EMI problems of laptop computer, mobile phone, industrial control equipment, communication cabinet, intelligent equipment, medical equipment, sophisticated equipment and other equipment;
  6. With an ultra-thin thickness, the thinnest thickness can be 0.05mm, which can be used in an ultra-small space to solve the internal EMI problems;
  7. High surface resistance can be directly applied in more complex circuits, without causing short circuit, affecting the work of the product;
  8. It can reduce the coupling conduction radiation interference between low frequency and reduce the low frequency echo interference;
  9. Through the ROHS, HF certification, with aging resistance characteristics.


RMS120 series wave absorption specifications

RMS120 Series Wave Performance Map


EMI absorber material is a functional composite material that mainly absorbs electromagnetic waves. It eliminates the back and forth reflection of electromagnetic waves in the shielding cavity, reduces the interference of clutter to its own equipment, and effectively prevents electromagnetic radiation from harassing and harming surrounding equipment and personnel. It is an advanced means of eliminating electromagnetic wave pollution. Applying EMI absorber materials to electronic equipment can absorb leaked electromagnetic radiation and achieve the purpose of eliminating electromagnetic interference.

According to the law that electromagnetic waves propagate in the medium from low-magnetic to high-permeability, high-permeability ferrite is used to guide electromagnetic waves, and through resonance, a large amount of radiation energy of electromagnetic waves is absorbed, and then the energy of electromagnetic waves is converted into heat energy through coupling to eliminate intelligence For the excess radio waves in the electronic system, the EMI absorber material can be cut and formed, and attached to the back of the touch panel or on the cable to resist electromagnetic interference EMI and optimize the performance of the touch screen.

Projected capacitive touch screens of smart electronic devices are susceptible to electromagnetic interference, and EMI voltages from both internal and external sources are capacitively coupled to the touch screen device. These EMI voltages can cause phone motion within the touch screen, which can confuse the measurement of charge motion when a finger touches the screen, affecting the sensitivity and touch accuracy of the touch screen. The solution can be to use EMI absorber materials to absorb electromagnetic waves and eliminate interference.


The difference between absorbing materials and shielding materials

Shielding materials are a class of materials that can isolate metals, magnetic fields, electromagnetic waves, and control electric fields between two spatial regions, and induce and radiate from one region to another. Specifically, the material used to make the shield. The shielding body surrounds the interference sources of components, circuits, assemblies, cables or the entire system to prevent the interference electromagnetic field from spreading outward, and wraps the receiving circuit, equipment or system with the shielding body to prevent it from being affected by the external electromagnetic field. The electromagnetic wave of the absorbing material cannot go in and out, but the electromagnetic shielding material does not necessarily reflect the electromagnetic wave, but reduces the amount of the electromagnetic wave reaching the other side of the shielding material through absorption or reflection. It can be said that the absorbing material is to make the same side of the absorbing material and the electromagnetic wave source to receive the reflected electromagnetic wave as little as possible, and the electromagnetic shielding material is to shield the material from the opposite side of the electromagnetic wave source, so as to receive as little influence of the electromagnetic wave as possible.



  1. The product is kept at room temperature to avoid direct sunlight and high temperature and high humidity;
  2. The above data are averaged from the multiple actual tests of the company, and the company has the right to make the final interpretation;
  3. The buyer must determine whether the product is suitable for a specific use and whether it is suitable for the buyer’s application mode. Many factors will affect the performance of the product for a specific use. If you have any questions about the company’s products, please contact the company personnel, so that we can better serve you.

About Company

PH mainly produces absorbing sheet, EMI suppression sheet, sintered ferrite sheet, electromagnetic shielding coating and other electromagnetic functional materials. It is the first national high-tech enterprise in China that focuses on the R&D, production and sales of sheet absorbing materials and electromagnetic shielding coatings. The products are sold to all over the world and are well received by the industry.

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