Extrusion & Post
6 مشاهدة
PBAT broken holes and pinholes
ظاهرة المشكلة
Pinholes and broken holes appear in PBAT film, occurring intermittently during blown film, and missed inspection leads to customer complaints.
تحليل الأسباب
Impurities or gel particles in the raw material; damaged screen allows impurities to pass; poor plasticization produces unmelted particles; blown film temperature too low and plasticization insufficient; local over-thinning of the film bubble causes rupture.
الحل
①Strengthen raw material filtration and screening; ②regularly replace the screen; ③increase plasticization temperature to ensure full melting; ④check film bubble uniformity; ⑤configure an online pinhole detector.
الخلاصة الأساسية
Screen and plasticization are the main causes of PBAT pinhole defects; online detection is an interception means; raw material cleanliness management cannot be ignored.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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