A longitudinal seal formed by overlapping one web edge over the other.
Why buyers encounter it
A lap seal may require the surfaces that meet to be seal-compatible. Do not change from fin to lap based on a glossary definition alone.
Buyer diagramReference diagram for lap seal.
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-078. Application-specific details remain subject to manufacturer and technical review.
