Extrusion & Post
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Gel Particles in CMC Extruded Film
Problem Phenomenon
Transparent gel particles of 0.1-0.5mm appear on the surface of CMC extruded film
Cause Analysis
High-molecular-weight components in CMC are not fully melted during extrusion, forming local high-crystallinity zones; extrusion temperature is low or mixing is insufficient
Solution
1)Increase extrusion temperature by 5-10°C to ensure full melting; 2)Increase screw mixing section length; 3)Inspect raw materials to ensure consistent grade; 4)Replace with finer 120-mesh screen to intercept unmelted particles
Key Takeaway
Gel particles are caused by insufficient melting; increasing temperature and mixing are the key
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