Specify the complete film construction
The published LUZB350X data names OPP, OPP/CPP, KOP/CPP, aluminium film and bubble wrap. The wet-wipes listing names PE, OPP, PET-paper film and aluminised or composite structures. These are broad material families, not a finished packaging specification.
Provide the supplier data sheet, total thickness, individual layers, sealant side, coefficient of friction, reel width, maximum diameter, core size, unwind direction and any print registration details.
Longitudinal and end seals
A horizontal flow wrapper forms a tube around the product using a longitudinal seal, then uses transverse jaws to create the pack ends and cut between packs. The listed LUZB350X configuration describes a middle side seal with top end seals.
Fin seal
The two inner sealant surfaces meet face-to-face. This can provide a robust and predictable seal but creates a projecting fin that must be guided beneath or above the pack.
Lap seal
One web edge overlaps the other. It can reduce the visible seal profile, but the film must support sealing across the overlapping surfaces and the machine must be configured accordingly.
Printed film and registration
Photoelectric registration detects a printed eye mark and adjusts cut position so artwork remains aligned with the pack. Supply artwork repeat, mark dimensions, contrast, location, unwind orientation and permitted print-to-cut tolerance.
Sealability and hot tack
The seal needs enough heat, pressure and dwell time to close reliably at production speed. Hot tack describes how the seal behaves while still warm. Product contamination, wrinkles and jaw alignment can all reduce seal quality.
Material reduction and recyclability
Downgauging or moving to a mono-material structure may improve material efficiency, but only if the new film forms, tracks and seals across the required speed range. Packaging sustainability should be evaluated across material use, product protection, waste, transport and the actual local recovery route.