What is the pet material

Polyethylene terephthalate (PET), with the chemical formula (C10H8O4) n, is synthesized by exchanging dimethyl terephthalate with ethylene glycol or esterification of terephthalic acid with ethylene glycol, followed by condensation polymerization. A crystalline saturated polyester, it is a milky white or light yellow, highly crystalline polymer with a smooth and glossy surface. It is a common resin in daily life and can be divided into APET, RPET, and PETG.
It has excellent physical and mechanical properties over a wide temperature range, with a usage temperature of up to 120 ℃. Its electrical insulation is excellent, and even at high temperatures and high frequencies, its electrical performance is still good. However, it has poor corona resistance, creep resistance, fatigue resistance, friction resistance, and dimensional stability.