Polyethylene films are a universal packaging and construction material made from HDPE, LDPE, and LLDPE. Packaging films: LLDPE stretch film (pallet wrapping, 17–23 µm), PE shrink film (group packaging of bottles, 60–120 µm), T-shirt bags (HDPE 7–15 µm). Construction films: covering film (100–200 µm, for waterproofing, vapor barrier, and construction site protection), black mulching film (for agriculture). Production: blown film extrusion — sleeve, half-sleeve, sheet. Width up to 6 m, thickness 7–200 µm. Additives: UV stabilizer (for outdoor use), antistatic, antifog (for food). GOST 10354-82. Rolls: 50–300 m. Stretch film: savings with machine application — pre-stretch 200–300% reduces film consumption by 2–3 times compared to manual. Machine roll 17 µm × 500 mm × 1500 m. Puncture resistance determines protection against damage during transport. Construction PE film: for vapor barrier (TYPE B according to SP 50.13330), foundation waterproofing (250+ µm), covering building materials. Reinforced: PP mesh inside PE — tensile strength 3–5 times higher than regular. Documentation: quality certificate, GOST 10354-82.