Extrusion & Post
5 görüntüleme
LDPE Extrusion Coating Pinholes
Sorun Belirtisi
Needle-like small holes appear in the coating, and barrier property fails.
Neden Analizi
Molten film rupture, base film surface contamination or too thin coating; bubble rupture in the melt also leaves pinholes.
Çözüm
①Increase coating thickness; ②clean the substrate surface; ③stabilize melt temperature to prevent rupture; ④check raw material moisture and volatiles.
Temel Çıkarım
Pinhole = check three: film rupture + substrate contamination + thin layer.
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