Extrusion & Post
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PTFE Filler Segregation
Problem Phenomenon
Glass fiber, carbon fiber, or bronze in filled PTFE is unevenly distributed, causing local weakness or uneven wear and inconsistent performance.
Cause Analysis
Insufficient mixing of filler and PTFE powder; handling or vibration before molding causes segregation; inconsistent extrusion or compaction causes uneven filler distribution; density differences cause particle separation.
Solution
①Fully mix filler and PTFE powder to ensure uniformity; ②Handle and store preforms carefully to avoid vibration; ③Optimize extrusion and compaction parameters to ensure uniform filler distribution; ④Sample-check mixing uniformity.
Key Takeaway
PTFE filler segregation affects the uniformity of wear resistance, thermal conductivity, and strength; mixing process is the foundation; handling management is the detail defense line.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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