1, long-term use temperature -80--220 degrees, has excellent chemical resistance, corrosion resistance to all chemicals, the friction coefficient is the lowest in plastics, good electrical performance, electrical insulation is not affected by temperature.
2, its chemical resistance is similar to polytetrafluoroethylene, better than vinylidene fluoride.
3, its creep resistance and compressive strength are better than polytetrafluoroethylene, high tensile strength, elongation up to 100-300%. Good dielectric property, excellent radiation resistance.
ETFE has good formability, balanced physical properties, good mechanical toughness, and excellent ray resistance. The material has the corrosion resistance of polytetrafluoroethylene, overcomes the non-stick and sexual defects of polytetrafluoroethylene on metals, and makes ETFE (F-40) an ideal composite material for metals.
Mainly used for industrial wire and cable, atomic reactor cable and vehicle wire and parts, industrial coatings and so on.
ETFE (F-40) fluorine plastics from the United States DuPont Company, Japan Asahi Glass, Japan Daikin Company, mainly used in anti-corrosion lining.
The material has the corrosion resistance of polytetrafluoroethylene, and at the same time has the unique strong adhesion characteristics of metal, to overcome the non-adhesion defect of polytetrafluoroethylene to metal, coupled with its average linear expansion coefficient close to the linear expansion coefficient of carbon steel, ETFE (F-40) become the ideal composite material and metal, with excellent negative pressure resistance characteristics.
Ethylene-tetrafluoroethylene copolymer film is a crystalline polymer with a melting point of 256~280℃. The ene can self-extinguish when burned. Its high shear mechanical strength, low temperature impact resistance is the best in the existing fluorine plastics, from room temperature to -80℃ can have a high impact strength, chemical stability, electrical insulation and radiation resistance.
The actual use of ETFE film began in the 1990s, mainly as a covering material for agricultural greenhouses, various shaped buildings, such as sports stands, building cone roof, casino, revolving restaurant canopy, casino canopy, parking lots, exhibition halls and museums. The Garden of Eden, one of the British New millennium projects, has the reputation of "the eighth wonder of the world".
It consists of 4 dome-like buildings connected by the world's largest greenhouse, covered with a transparent cover made of ETFE film material, its mass is only 1% of the same area of glass, transparent sheet can be recycled, and has good insulation.
ETFE membrane is an alternative material of superior quality in transparent building structures and has proved to be a reliable and economical roofing material for many projects over the years with its many advantages. The membrane is made of artificial high strength fluoropolymer (ETFE), and its unique anti-adhesion surface makes it highly resistant to dirt and easy to clean, usually rain can remove the main dirt.
With a service life of at least 25-35 years, ETFE membranes are ideal for use in permanent multi-storey movable roof structures. The membrane material is mostly used for two or three layers of aerated support structures with a span of 4 meters, and the membrane span can also be increased according to the geometry and climatic conditions of special projects.
Film length is easy to install as the standard, generally 15-30 meters. Small span single-layer structures can also be used in smaller sizes. ETFE film meets B1, DIN4102 fire rating standards, and will not drip when burning. And the film mass is very light, only 0.15-0.35 kg per square meter. This feature makes it have considerable advantages even in the case of film melting caused by smoke and fire.
Depending on the position and surface printing, the transmittance of ETFE film can be as high as 95%. The material does not block the transmission of light such as ultraviolet rays to ensure the natural light inside the building. By surface printing, the semi-transparency of the material can be further reduced to 50%. Depending on the geometry and the number of layers, the K value can be as high as 2.0W/m2K. The energy consumption index of a three-layer printing film, for example, can reach 0.77.
Due to its excellent quality, ETFE films require almost no daily maintenance. A simple inspection of the roof due to mechanical damage can be carried out (once a year is appropriate) and on-site repairs can be made as required. At the same time, the ventilation system can be checked and the filter can be replaced.
ETFE films are completely recyclable materials that can be reused to produce new membrane materials, or to separate impurities to produce other ETFE products.
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