What is the relationship between polyester staple fiber and chemical fiber

Polyester staple fiber is an important type of constituent fiber and is the trade name of polyester fiber. It is a fiber-forming high polymer made from purified terephthalic acid (PTA) or terephthalate (DMT) and ethylene glycol (EG) through esterification or transesterification and polycondensation reaction - polyparaphenylene Ethylene glycol ester (PET), fibers made by spinning and post-processing.
Chemical fiber is a fiber with textile function obtained by using natural polymer compounds or artificially composed polymer compounds as materials, through the preparation of spinning dope, spinning, and post-treatment.
Chemical fiber fabric is a new type of clothing developed in modern times, and there are many types. Here mainly refers to pure spinning, blended, or interwoven fabrics processed from chemical fibers, that is to say, fabrics woven from purified fibers, excluding blended and interwoven fabrics with natural fibers. The characteristics of chemical fiber fabrics are woven into its The characteristics of chemical fiber itself are selected.
Fibers can be divided into plant fibers: cotton, hemp
Chemical fiber is a general term for fibers that are made of natural or artificial high-molecular substances as materials and processed by chemical or physical methods. Due to the different origins of the polymer compounds used, it can be divided into man-made fibers made of natural polymer substances and synthetic fibers made of synthetic polymer substances. Referred to as chemical fiber. Polyester is an important type of constituent fibers and is the trade name of polyester fibers in my country. It is a fiber-forming high polymer made from purified terephthalic acid (PTA) or terephthalate (DMT) and ethylene glycol (EG) through esterification or transesterification and polycondensation reaction - polyparaphenylene Ethylene glycol ester (PET), fibers made by spinning and post-processing. In short, a chemical fiber contains polyester. Polyester is a polymer substance that is artificially composed of chemical fibers.