Polyester fiber refers to a fiber whose main chain contains an ester group and which is made by spinning a fiber. It refers to a fiber produced by using ethylene phthalate as a raw material. According to the English name of the raw material, "polyethylene terephthalate" Abbreviation, referred to as "PET" fiber. It is commonly known as polyester in China. The so-called "yarn" is actually a general term for "yarn" and "line". It is defined in the material science of clothing as follows: "Yarn" is to arrange many short fibers or filaments in an approximately parallel state and along the axial direction. Rotating twisting to form an elongated object with a certain strength and linear density; and "line" is a strand formed by twisting two or more single yarns.
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