Extrusion & Post
13 visualizações
PVA film blocking, difficult to delaminate
Fenómeno do problema
Interlayer blocking of PVA film, delamination force >5N/15mm, automatic slitting machine cannot delaminate
Análise das causas
PVA surface adhesion strong; film temperature too high >40°C during winding; low molecular substances migrate to the surface forming an adhesive layer
Solução
1) Add 0.3-0.5wt% antiblock agent erucamide; 2) Fully cool to <25°C before winding; 3) Add 0.2wt% slip agent to synergistically reduce blocking; 4) Reduce winding tension to reduce interlayer pressure
Conclusão principal
Film blocking is caused by surface tackiness and high-temperature winding; antiblock agent and full cooling are effective countermeasures
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!