Film for frozen food applications requires the highest quality and tight specifications regarding a heat seal initiation temperature (lowest temp required to make a good seal, the lower the better.)
Slip level (proper slip level so the film will travel freely on the vertical form $& fill machines – VFF) and film Gauge variance to be under 10% (for printing high end process jobs). Very important is the opaqueness when making white film and high clarity when making clear film. All frozen food film are made in a co-extruder in a 3 layer structure.
Outside and inside layers will have mLLD/LDPE blend for sealing. Middle layer can be the same or use some reclaim material.