PTFE, commonly known as "the Plastic King", is a high polymer obtained by polymerizing tetrafluoroethylene as the monomer, with the chemical formula (C2F4)n. It has excellent heat and cold resistance, allowing for long-term use between -180°C and 260°C. This material features resistance to acids and alkalis, as well as to various organic solvents, and is nearly insoluble in all solvents. Additionally, PTFE boasts high-temperature resistance, with an extremely low friction coefficient, making it an ideal coating for cleanable inner layers of water pipes, in addition to its lubricating properties.
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Polyetherimide (PEI) is a super engineering plastic made from amorphous polyetherimide, featuring high-temperature resistance, dimensional stability, chemical resistance, flame retardancy, electrical properties, high strength, and high rigidity. PEI resins are widely used in high-temperature terminals, IC bases, lighting equipment, FPCBs (flexible printed circuit boards), liquid conveyance equipment, aircraft interior parts, medical devices, and household appliances.
3. ETFE architectural films, directly manufactured from ETFE (polytetrafluoroethylene) raw material. ETFE boasts excellent impact resistance, electrical properties, thermal stability, and chemical corrosion resistance, as well as high mechanical strength and good processing characteristics. ETFE architectural films are widely used in the construction industry in our country. This film material has excellent light transmission properties, is known as "soft glass," is lightweight, at only 1% of the weight of glass of the same size; it has good flexibility, high tensile strength, is not easily torn, and has elongation exceeding 400%; it has strong weather resistance and chemical corrosion resistance, with a melting point as high as 200℃; it effectively utilizes natural light, saves energy; and offers good acoustic performance. The self-cleaning function of ETFE films makes their surface less prone to dirt, and rain can wash away the small amount of dirt that accumulates, with a cleaning cycle of about 5 years. Additionally, ETFE films can be pre-fabricated into ready-made thin-film bubble shapes, facilitating installation and maintenance. Of course, ETFE has its drawbacks, such as the material being easily damaged by external environments leading to air leakage and high maintenance costs, but with the increasing construction of large sports stadiums, tourist attractions, and airport terminals, ETFE's advantages are becoming more pronounced.
