The disadvantage of polyamide fiber is that its optical rotation resistance is slightly poor. If it is exposed to sunlight for a long time outdoors, it is prone to yellowing and its strength decreases. Compared with polyester fiber, it has poor shape retention. Therefore, the fabric is not straight enough. Besides, its fiber surface is smooth and has a waxy feeling. In recent years, various improvement measures have been developed for these shortcomings, such as adding light resistant agents to improve optical rotation resistance, or making profiled sections to improve the appearance and luster It can be blended or interwoven with other fibers to improve the handle.

The most outstanding advantage of polyamide fiber is that it has superior wear resistance than other fibers, followed by its good elasticity, its elastic recovery rate is comparable to wool, and its weight is light, with a specific gravity of 1.14. Among the commercially available synthetic fibers, it is second only to polypropylene (polypropylene fiber, with a specific gravity of less than 1), It is lighter than polyester fiber (with a specific gravity of 1.38), so polyamide fiber can be processed into fine, uniform, soft and smooth silk for weaving beautiful and durable fabrics. In addition, it has the same advantages as polyester fiber, such as corrosion resistance, no fear of moth damage, and no fear of mildew.