Extrusion & Post
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PET staple fiber
Fenómeno do problema
The strength unevenness of polyester staple fiber exceeds the standard
Análise das causas
Fluctuations in spinning and drawing processes cause uneven fiber orientation and crystallization, resulting in large strength dispersion; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solução
Stable control of drawing temperature and ratio; crimping and heat-setting process optimization; online monitoring of strength CV value; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Staple fiber uniformity relies on process stability and online monitoring; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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