Extrusion & Post
12 مشاهدة
Delamination and Peeling of PE Injection Molded Products
ظاهرة المشكلة
The surface of PE products peels off in layers, obvious at edges or near the gate.
تحليل الأسباب
Mixing in incompatible materials (foreign resins, contaminated regrind, color masterbatch with mismatched carrier) prevents the layers from fusing; excessive release agent forms an isolation layer on the surface; excessive gate shear causes a huge orientation difference between the skin and core layers — all three cause delamination and peeling.
الحل
①Investigate mixed-material contamination and standardize regrind management; ②Purge the machine thoroughly when changing material; ③Control release agent dosage; ④Reduce gate shear; ⑤Increase mold temperature to ease orientation.
الخلاصة الأساسية
PE delamination = a 'contamination and compatibility' problem: first check mixed material and regrind, then control release agent and shear; for delaminated parts, don't forcibly adjust the process — find the contamination source first.
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