英文名: Polyethylene Terephthalate，简称PET。
PET is milky white or light yellow, highly crystalline polymer, the surface is smooth and shiny. In a wide temperature range with excellent physical and mechanical properties, long-term use temperature up to 120 ℃, excellent electrical insulation, even at high temperature and high frequency, its electrical performance is still good, but the resistance to corona is poor, anti- Creep, fatigue resistance, abrasion resistance, dimensional stability are good.
PET 是乳白色或浅黄色、高度结晶的聚合物，表面平滑有光泽。在较宽的温度范围内具有优良的物理机械性能，长期使用温度可达120℃，电绝缘性优良，甚至在高温高频下，其电性能仍较好，但耐电晕性较差，抗蠕变性，耐疲劳性，耐摩擦性、尺寸稳定性都很好。

PET is a transparent plastic with good gas barrier properties. It is also relatively cheap and strong.
This makes it especially suitable for producing soft drink bottles.