Extrusion & Post
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PET industrial yarn
Problem Phenomenon
Insufficient strength and dimensional stability of tire cord
Cause Analysis
Tire cord requires high strength and low shrinkage; ordinary spinning processes cannot meet the requirements of skeleton materials; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Select high-viscosity chips; high-ratio drawing and heat-setting process; test dry heat shrinkage according to cord standards; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Tire cord is a dedicated route of high-viscosity chips plus high-ratio drawing; 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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