Overview of shielding materials, do you know which shielding materials

         Shielding materialIt refers to materials that can attenuate external electromagnetic radiation. They are usually made of metal, non-metal, or a combination of metal and non-metal. The purpose of shielding materials is to prevent electromagnetic radiation from causing damage to the human body and the environment, while also avoiding the use of cleaning agents to clean materials.
Common shielding materials include metallic materials, non-metallic materials, and composite materials. For example, ferroalloys have high conductivity and electromagnetic shielding properties, and are commonly used in the manufacture of electrical components. Plastics such as polytetrafluoroethylene and polycarbonate have excellent corrosion resistance and wear resistance, and are commonly used in the manufacturing of mechanical parts and sealing materials. conductive rubberConductive polymers are also common shielding materials.
When selecting shielding materials, it is necessary to choose according to specific circumstances to ensure that the quality and performance of the product meet the requirements. In addition, it is necessary to understand relevant standards and specifications in order to better control the quality and safety of products.

1. Conductive cloth

Fiber cloth (usually polyester fiber cloth) is pre treated and coated with electroplated metal to give it metallic properties and become conductive fiber cloth. It can be divided into nickel plated conductive cloth, carbon plated conductive cloth, nickel plated copper conductive cloth, and aluminum foil fiber composite cloth. There are different styles in appearance, such as plain weave and grid.

2. Conductive elastomer lining material (conductive rubber)

Due to the presence of silver in these materials, packaging and storage conditions should be similar to other silver containing components. They should be stored in plastic sheets, such as polyester or polyethylene, away from sulfur-containing materials.

3EMI conductive foam lining material

Conductive foam is made by winding a conductive braided sleeve around a foam core made of polyurethane or EPDM. The conductive braided sleeve is usually composed of silver plated nickel nylon, aluminum foil, or Monel wire (nickel copper alloy) Ferrex (tin plated copper-clad steel wire)

4. Metal EMI lining, clip lining, and hook and claw beryllium copper spring

These varieties include braided wire mesh, elastic core wrapped wire mesh, oriented metal wire in elastic material, and metal wire screen, which typically provide 60dB to 100dB attenuation in the range of 20MHz-1GHz.

5. Conductive composite agent

Including conductive adhesives and conductive coatings. Conductive adhesives are generally made by doping metal fillers such as silver particles or silver copper plated particles into epoxy resin, silicone, and flexible polyethylene through special processes.

6. STM patch foam

STM patch foam is a grounding terminal that can be used in surface assembly technology and is one of the surface assembly components.

7. Absorbing material

Absorbing materials are generally made by mixing alloy powder with polymer resins through various processes, rolling them into flexible sheet materials, and converting them into other forms of energy such as thermal energy and potential energy through mechanisms such as hysteresis loss, dielectric loss, and resistance loss, achieving the effect of shielding and absorbing electromagnetic waves.