Extrusion & Post
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PTFE Lining Deformation and Delamination
Problem Phenomenon
PTFE anticorrosion equipment linings deform, delaminate, and collapse inward, separating from the metal shell, and negative pressure conditions accelerate failure.
Cause Analysis
PTFE's linear expansion coefficient is more than 10 times that of metal, shrinking inconsistently with the shell during temperature changes; technical molding defects make the lining not firmly adhered to the container; fluid cold-hot changes and negative pressure operation aggravate it.
Solution
①Lining structure design considers expansion differences; ②'2079851475616104453 ensures bonding between lining and shell; ③Special assessment of negative pressure conditions; ④Regular endoscopic inspection.; After adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Key Takeaway
PTFE lining's thermal expansion mismatch is a structural contradiction; molding quality determines bonding reliability; negative pressure conditions are a severe test.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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