This part of GB/T 4146 lists the generic names and main characteristics of various chemical fibers based on main polymers currently produced industrially for textile and other purposes. This section gives suggestions for the establishment of generic names (see Appendix A), describes the fiber structure of multi-component fibers (see Appendix B) and modified fibers (see Appendix C), and lists the English name index of generic names (see Appendix D) and generic symbol index (see Appendix E). This section applies to the generic names of various chemical fibers. 2 Terms and Definitions