Chemical filament

The utility model relates to a chemical filament, in particular to a polyester filament having moisture-absorbing quick-dry performance and thermal insulation performance. The fiber section of the chemical filament is provided with central points, and the central points are connected with one or more than one branch section in a radial mode. The chemical filament is characterized in that the number of the central points is one or more than one, and one branch section is positioned between two adjacent central points. The central points are increased, the number of the attached branch sections is also increased, the number of capillary channels is also increased, and moisture absorption and sweat releasing performances of the fiber are good. The chemical filament is further characterized in that the fiber central points are mesopore-shaped and not solid like ordinary fibers. Not only does the chemical filament have good moisture absorption and sweat releasing performances, but also the fiber has good heat rete