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What material is PET?


source:[Gravimetric blender]   release time:2021-05-03 11:12:43




PET is polyethylene terephthalate, which is first synthesized by transesterification of dimethyl terephthalate and ethylene glycol or esterification of terephthalic acid and ethylene glycol, and then It is obtained by polycondensation reaction.

Commonly known as polyester resin, it is a crystalline saturated polyester. It is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface, creep resistance, fatigue resistance, abrasion resistance and dimensional stability, low abrasion and hardness. High, with the greatest toughness among thermoplastics;

It has good electrical insulation and is not affected by temperature, but it has poor corona resistance. Non-toxic, weather resistance, good chemical resistance stability, low water absorption, resistance to weak acids and organic solvents, but not immersed in hot water and alkali.

The main applications are the accessories of electronic and electrical switches, instrument machinery, currency counters, etc.; flow control valves, pedal transmissions in the automotive industry, etc.; in addition, there are wheelchair bodies and wheels, clock parts, sprayers and other components.

Although PET is a polar polymer, it has excellent electrical insulation and can still be well maintained at high frequencies. PET has poor corona resistance and cannot be used for high-voltage insulation; electrical insulation is affected by temperature and humidity, and the influence of humidity is greater.

PET contains ester bonds and is not resistant to the effects of water, acid, and alkali under high temperature and water vapor conditions. PET is stable to organic solvents such as acetone, benzene, toluene, trichloroethane, carbon tetrachloride and oils, and has high resistance to some oxidants such as hydrogen peroxide, sodium hypochlorite and potassium dichromate. PET has excellent weather resistance and can be used outdoors for a long time.
With so many PET, the mixing ratio of PET with a Gravimetric blenderis more accurate.[Gravimetric blender]