Electromagnetic ShieldingThe key is to ensure the continuity of conductivity of the shielding body, that is, the entire shielding body must be a complete and continuous conductor.
Polyimide (PI) is one of the organic polymer materials with the best comprehensive performance, possessing excellent properties such as good thermal stability, high strength, high toughness, radiation resistance, and good shielding.
What is PET? Simply put, it is a type of plastic with chemical components including polyethylene terephthalate (PET) and polybutylene terephthalate (PBT).
The main components of PET are ethylene terephthalate PET and polybutylene terephthalate PBT. The former is called polyester resin, commonly known as polyester resin, which is a condensed polymer of terephthalic acid and ethylene glycol. Together with PBT, it is collectively referred to as thermoplastic polyester or saturated polyester.PET and PBT, together known as thermoplastic polyester, are one of the five major industrial plastics.
There will always be many openings or gaps between different parts on a reinforced display as a whole. In order to improve the shielding effectiveness of the whole machine, maintain the continuity of the shielding body, and reduce the openings and gaps, shielding materials must be used for overlapping,
In the era of the Internet of Things, 5G is unfolding vigorously, driving the development of a large number of industries. Due to high-frequency communication, there is a significant demand for electromagnetic shielding and thermal conductivity from the mobile end to the base station. Due to the use of millimeter waves, but with short wavelengths and high losses, many base stations are required to meet high-frequency communication needs. This also brings us a question, what kind of electromagnetic shielding materials are needed for so many base stations in the 5G era?
Firstly, 5G communication has two frequency bands - FR1 and FR2. Among them, FR1 has a frequency range between 450MHz and 6GHz, FR2 has a frequency range between 24.25 and 52.6GHz, and FR2 is the millimeter wave in question. With the increasing number of base stations, there has been a qualitative leap in network speed, and the electromagnetic radiation it brings has also been increasingly valued. In early 2019, the "Monitoring Method for Electromagnetic Radiation Protection of Mobile Communication Base Stations" issued by the Ministry of Ecology and Environment officially came into effect, which also brought about an extremely urgent need for electromagnetic shielding.
PET board
The main characteristics are high hardness, good sliding and wear resistance hardness, and good electrical insulation,Stable friction coefficient with excellent performancewear resistance(Better than nylon), very gooddimensional stability(superior to POM), physiologically inert (suitable for contact with food).
PI film is a high-performance thin film insulation material in the world, which is formed by the condensation and casting of phthalic anhydride dianhydride (PMDA) and diaminodiphenyl ether (DDE) in a strongly polar solvent, followed by imidization. Polyimides can be classified into two types based on their chemical composition: aromatic polyimides and aliphatic polyimides; But it is mainly classified based on processing characteristics, divided into thermoplastic polyimide and thermosetting polyimide. Among them, thermoplastic polyimides are mainly used in imine films, coatings, fibers, and modern microelectronic polyimides, while thermosetting polyimides mainly include bismaleimide (BMI) type and monomer reactant polymerization (PMR) type polyimides and their respective modified products.
So PI/PET gold plating film is very suitable for use as 5G electromagnetic shielding material.
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