Why buyers encounter it
COF can be relevant to winding, feeding, and machine behavior, but it is one part of runnability and requires technical review.
Use the term carefully
This definition helps interpret a packaging conversation. It does not establish a complete film structure, machine setting, regulatory conclusion, shelf-life result, or approval for a particular application.
Research source: PC-047, PC-083. Application-specific details remain subject to manufacturer and technical review.