Processing Machinery
5 views
HDPE film poor transparency
Problem Phenomenon
The film haze is high and the transparency is insufficient, with a gap compared with similar products.
Cause Analysis
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
Solution
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
Key Takeaway
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
Was this helpful?
0 people found this helpful
Thank you for your feedback!