FPC electromagnetic shielding film with ultra-high conductivity, super strong EMI SE, and shape memory effect of electrical/thermal stimulation

FPC electromagnetic shielding filmThe preparation method belongs to the field of polymer science and technology First, EVA fiber film is prepared by electrospinning and UV curing. After curing, it is immersed in dopamine solution, and the fiber film with polydopamine film deposited on the surface is placed in silver ammonia solution. Then, glucose solution is added for reaction. After the reaction is complete, it is dried to obtain the electrically stimulated shape memory FPC electromagnetic shielding film
The FPC electromagnetic shielding film prepared by the present invention has ultra-high conductivity, super strong EMI SE, and shape memory effect of electrical/thermal stimulation The comprehensive performance is that the FPC electromagnetic shielding film can freely deform and fully adhere to densely arranged electronic components according to the size of the FPC under electrical stimulation, while still maintaining stable high EMI SE; When mobile phones are discarded and recycled, the shape recovery and EMI SE recovery of the shape memory polymer based conductive composite fiber film are driven by thermal stimulation, which has strong recycling and reuse properties

A measure to shield the end of the stator core of a large capacity steam turbine generator using components made of conductive or ferromagnetic materials, in order to reduce additional losses and local heating caused by magnetic leakage at the end of the stator winding in the structural components.

electromagnetic shieldingStructural forms: (There are mainly the following types)

1. The electromagnetic shielding room used for confidentiality purposes is divided into detachable and welded structural forms. Welding can be divided into self-supporting and direct bonding types.

2. The electromagnetic shielding room with a building area of less than 50m2 that needs to be relocated in the future should adopt a detachable structural form.

3. The attenuation index of electric field shielding should be greater than 120dB and the building area should be greater than 50m2. The electromagnetic shielding structure should be self-supporting.

4. The requirement for electric field shielding attenuation index is greater than 60dB in the shielding room, and the structure should be directly attached. Galvanized steel plate can be selected as the shielding material, and the thickness of the steel plate is determined according to the shielding performance index.

5. The attenuation index of electric field shielding should be greater than 25dB in the shielding room. The electromagnetic shielding structure should be directly attached, and the shielding material can be selected from electromagnetic shielding film or metal wire mesh. The mesh size of the metal wire mesh should be based on the wavelength of the shielded signal.