Extrusion & Post
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PBN flow mark Problem in Drawing Processing
Problem Phenomenon
Polybutylene naphthalate PBN exhibits flow mark in drawing processing at 270-300°C.
Cause Analysis
Under high-temperature processing at 270-300°C, crystallization causes the problem.
Solution
Solve by drying to a moisture content of <50ppm.
Key Takeaway
PBN ultra-high-temperature processing requires comprehensive protection.
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