High-Density Polyethylene (HDPE) is a highly crystalline, non-polar thermoplastic characterized by an exceptionally low surface energy. This molecular reality dictates that standard adhesives cannot form adequate bonds with the polymer matrix. Consequently, bonding a protective membrane to an HDPE container lip requires a highly specialized heat-sealable polymer layer, typically formulated from ethylene-vinyl acetate (EVA) copolymers or specific polyethylene blends that share molecular compatibility and chain mobility with the container substrate.