Extrusion & Post
7 visualizações
LDPE Extrusion Coating Pinholes
Fenómeno do problema
Needle-like small holes appear in the coating, and barrier property fails.
Análise das causas
Molten film rupture, base film surface contamination or too thin coating; bubble rupture in the melt also leaves pinholes.
Solução
①Increase coating thickness; ②clean the substrate surface; ③stabilize melt temperature to prevent rupture; ④check raw material moisture and volatiles.
Conclusão principal
Pinhole = check three: film rupture + substrate contamination + thin layer.
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!