Processing Machinery
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HDPE film poor transparency
Fenómeno del problema
The film haze is high and the transparency is insufficient, with a gap compared with similar products.
Análisis de la causa
The barrel or die head temperature is too low, causing poor plasticization; insufficient bubble tube cooling makes the crystals coarse; the optical performance of the raw material itself is limited.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
①Appropriately raise the barrel and die head temperature; ②increase the air ring air pressure and air volume to strengthen cooling; ③appropriately reduce the extrusion speed; ④select an optical grade.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Transparency is affected by both plasticization quality and crystallization state; temperature and cooling are optimized synergistically, and if necessary, solve it at the grade level.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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