Polyethylene terephthalate, with the chemical formula [COC6H4COOCH2CH2O] n. (English: Polyethylene terephthalate, referred to as PET). Dimethyl terephthalate is synthesized by transesterifying dimethyl terephthalate with ethylene glycol or esterifying with terephthalic acid and ethylene glycol. Prepared by polycondensation. It is a crystalline saturated polyester. It is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface. Is a common resin in life, can be divided into APET, RPET and PETG.
1. Has good mechanical properties, impact strength is 3 to 5 times that of other films, and good folding resistance.
2. Resistant to oil, fat, enoic acid, dilute alkali, and most solvents.
3. It can be used for a long time in the temperature range of 55-60 ℃, and it can withstand 65 ℃ high temperature and -70 ℃ low temperature in short-term use, and it has little effect on its mechanical properties at high and low temperatures.
4. Low permeability of gas and water vapor, with excellent gas barrier, water, oil and odor performance.
5. High transparency, can block ultraviolet rays, good gloss.
6. Non-toxic, tasteless, good health and safety, can be directly used in food packaging.
The main applications are electrical appliances, electrical sockets, electronic connectors, rice cooker handles, TV bias yoke, terminal blocks, circuit breaker housings, switches, motor fan housings, instrument mechanical parts, money counter parts, electric irons, induction cookers Furnace accessories; flow control valves, carburetor covers, window controllers, foot derailleurs, switchboard covers in the automotive industry; gears, vanes, pulleys, pump parts, and wheelchair bodies and wheels, lampshades Housings, luminaire housings, drain fittings, zippers, watch parts, sprayer parts.
In addition: It can be spun into polyester fiber, namely polyester. It can be made into thin film for recording, video, motion picture film, substrate, insulation film, product packaging, etc. As plastic can be blown into various bottles, such as cola bottles, mineral water bottles and so on. Can be used as electrical parts, bearings, gears, etc.