How can rough surfaces be avoided on extrudates?

This fault points to various possible causes:

1. Die temperature too low

Remedy:
Increase die temperature

2. Melt temperature too low

Remedy:
Increase melt temperature

3. Poor contact with calender rolls

Remedy:
Increase roll temperature

4. Nip wrongly adjusted

Remedy:
Adjust nip

5. Calender rolls uneven

Remedy:
Polish calender rolls

back