The presence of broken filaments can affect the subsequent textile process and the quality of the fabric. Different weaving techniques have different requirements for yarn:

1. The situation where the requirements for broken filaments are not strict: ①. Low elasticity yarn used in the loom needs to be woven after false twisting, sizing, or networking; ② In knitting processing, weft knitted silk is used due to its short weaving process and low speed.

2. The situation where strict control is required for broken filaments: ① Low elasticity yarn used in water jet looms; ② The production speed of warp knitted silk is high, and each thread needs to pass through the needle hole. The presence of broken filaments can easily cause breakage.

The production broken filaments not only related to the processing conditions of DTY, but also to the quality of POY. The reasons include: ① spinning temperature is too high or too low, spinning component pressure is too low or filter material is punctured, improper cooling and forming conditions, improper selection of POY oil agent, and abrasion and poor winding forming of the wire guide on the filament. ② POY with hidden dangers, although it does not produce breakage or filaments during spinning and winding, during the processing of DTY, weak links in the filament are exposed due to heating, stretching deformation, and other factors, resulting in breakage or filaments. ③ Even high-quality POY, if the process conditions are not properly controlled during processing into DTY, will still produce broken filaments.

The main reasons for the generation of broken filaments during the process of POY processing to DTY are: ① Improper selection of D/Y ratio and stretching ratio, ② high temperature in the hot box, ③ excessive abrasion of the wire guide on the wire strip, etc.