PET material can be used in the temperature range of 120°C for a long period of time. The short-term use can withstand high temperature of 150°C, can withstand -70°C low temperature, and its mechanical properties have very little effect at high and low temperatures.
Pet material, English name Polyethylene terephthalate, commonly known as polyester resin, is the most important species of thermoplastic polyester.
It is a polycondensate of terephthalic acid and ethylene glycol, together with PBT, collectively referred to as thermoplastic polyester, or saturated polyester. In 1946, the United Kingdom issued the first patent for the preparation of PET. In 1949, the British ICI formula completed the pilot test. After the United States DuPont purchased the patent, it established a production device in 1953, which was the first to achieve industrial production in the world. In the early stage, almost all of PET was used for synthetic fibers (commonly known as Dacron and Dacron in China). Since the 1980s, PET has been used as a breakthrough in engineering plastics, and nucleating agents and crystallization accelerators have been developed. PET and PBT are now used as thermoplastic polyesters and have become one of the five engineering plastics. PET is divided into fiber-grade polyester chips and non-fiber polyester chips. 1 Fiber-grade polyesters are used to make polyester staple fibers and polyester filaments, and are used as raw materials for processing fibers and related products of polyester fiber enterprises. Polyester is the largest product in chemical fiber production. 2 Non-fiber polyesters are also used in bottles, films, etc., and are widely used in the packaging industry, electronic appliances, medical and health, construction, automotive and other fields. Among them, packaging is the largest non-fiber application market for polyester, and it is also the most growth of PET. Fast field. As a packaging material PET Advantages: 1. Has good mechanical properties, impact strength is 3 to 5 times that of other films, good folding durability. 2. Resistant to oil, fat, oleic acid, dilute alkali, resistant to most solvents. 3. Has excellent high and low temperature performance, can be used in the 120 °C temperature range for a long time, short-term use can withstand 150 °C high temperature, can withstand -70 °C low temperature, and high, low temperature when its mechanical properties have little effect. 4. Gas and water vapor permeability is low, both excellent gas barrier, water, oil and odor performance. 5. High transparency, can block ultraviolet light, good gloss. 6. Non-toxic, odorless, good health and safety, can be directly used for food packaging.
The temperature resistance of pet material is fixed, and the answers are all uniform.