PET 是乳白色或淺黃色、高度結晶的聚合物，表面平滑有光澤。在較寬的溫度范圍內具有優良的物理機械性能，長期使用溫度可達120℃，電絕緣性優良，甚至在高溫高頻下，其電性能仍較好，抗蠕變性，耐疲勞性，耐摩擦性、尺寸穩定性都很好，但耐電暈性較差。PET分為纖維級聚酯切片和非纖維級聚酯切片。①纖維級聚酯用于制造滌綸短纖維和滌綸長絲，是供給滌綸纖維企業加工纖維及相關產品的原料。滌綸作為化纖中產量最大的品種。②非纖維級聚酯還有瓶類、薄膜等用途，廣泛應用于包裝業、電子電器、醫療衛生、建筑、汽車等領域，其中包裝是聚酯最大的非纖應用市場，同時也是PET增長最快的領域。

PET is a milky white or light yellow, highly crystalline polymer with a glossy finish.In relatively wide temperature range with excellent physical and mechanical properties, long-term use of up to 120 ℃ temperature, excellent electrical insulation, even under the high temperature and high frequency, its electric performance is still good, creep resistance, fatigue resistance, frictional resistance, dimensional stability are good, but the corona resistance is poor.PET is divided into fiber - grade polyester chip and non - fiber grade polyester chip.It is used to manufacture polyester staple fiber and polyester filament yarn, which is the raw material for processing fiber and related products of polyester fiber enterprises.Polyester is the largest production in chemical fiber.(2) the fiber polyester film and bottle, and other purposes, are widely used in packaging industry, electronic appliances, medical and health care, construction, automotive and other fields, including packaging is one of the largest non polyester fiber application market, is also the fastest growth in PET.