What are the causes and classifications of yarn defects

Raw material yarn defects are mainly caused by occasional yarn defects caused by poor raw material length uniformity, large difference in fineness, high short-staple rate, low maturity, neps, leaf chips, cotton seed hulls, and high fiber-bearing seed chips. The control of raw material yarn defects should mainly start with controlling the linters and trash content of the raw materials, stabilizing the difference in length and fineness of the cotton, and selecting raw materials with moderate maturity.

Drafting process yarn defects are mainly caused by occasional yarn defects caused by unreasonable process parameter configuration. Control of drafting process yarn defects should mainly focus on optimizing process parameters, reducing fiber damage, reducing the generation of short lint and neps in the production process, improving fiber straightness and parallelism and separation, rationally distributing drafting multiples, and strengthening the prevention of floating Control the fiber, reduce and eliminate the draft wave and other aspects.

Operational management yarn defects are mainly caused by occasional yarn defects caused by improper operation and management. Involving equipment management, process management, operation management, temperature and humidity management, and many other aspects, the non-standard and inadequate operation management is also the critical factor that produces occasional yarn defects. Controlling operational and management yarn defects should mainly focus on strengthening the management of process components such as carding and drafting, improving equipment operation status, reducing and eliminating mechanical waves, ensuring process operation, standardizing staff operating methods, strengthening air conditioning management, and stabilizing workshop temperature and humidity. , To reduce the entanglement of rubber rollers, aprons and rollers, strengthen cleaning, prevent flying flowers from attaching and blocking the drafting channel, etc.

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