Production & Quality
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PTFE Sintering Deformation
Problembeschreibung
PTFE sheets warp and deform after sintering, flatness is out of tolerance, and deformation in the thickness direction is inconsistent.
Ursachenanalyse
Too short holding time causes uneven internal and external temperatures; too fast cooling rate generates strain and cracking; uneven furnace temperature distribution with large local temperature differences; cooling rate affects crystallinity and thus physical properties.
Lösung
①Extend holding under 300~330℃ conditions to make internal and external temperatures uniform; ②Cool down at a rate of ≤50℃/h; ③Increase temperature measurement points to improve temperature control accuracy and make furnace temperature uniform; ④Appropriately extend the cooling time.
Wichtigste Erkenntnis
PTFE sintering deformation is directly related to crystallinity management; cooling rate is an important parameter affecting physical properties; furnace temperature uniformity needs multi-point temperature measurement guarantee.
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