Polyester fiber is actually a synthesis of chemical fiber names. It is a synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acid and glycol. In China, we generally call it "polyester". The polyester filament mentioned in the title is actually a classification of polyester fiber (polyester), and polypropylene and polyester are two classifications, so the answer is obvious.

The literal interpretation of polyester filament is to make polyester into long filaments, and the professional interpretation is that of polyester filaments, which are filaments with a length of more than one kilometer, and the filaments are wound into a group. The advantages of polyester filaments are high strength, high thermal stability, good elasticity, abrasion resistance, and good dyeability. In terms of use, polyester is used as a medical fiber. After being blended with other fibers, the fabric made can achieve the effect of non-wrinkle and non-ironing after washing. Not to mention in industry, polyester filaments are widely used in canvas, tents, fishing nets, ropes and so on. And polypropylene filament can be seen from the fiber name, polypropylene and polyester are two different concepts. As a classification of polypropylene, polypropylene filament also includes polypropylene staple fiber, hollow fiber, profiled fiber, composite fiber, etc.

Polyester is the world's largest chemical fiber material, and its performance and application are unquestionable. However, polypropylene is a rising star, especially in this growing chemical fiber market. Traditional and original chemical fibers can no longer satisfy discerning consumers. As a new type of chemical fiber material, it can alleviate this tired chemical fiber market. Both have their own advantages and can only differ from person to person.
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