To ensure packaging speed, enhance production efficiency, prevent moisture absorption during storage or shelf life, and maintain an attractive appearance, plastic films used for cigarette outer packaging must exhibit excellent slip properties, antistatic performance, high moisture barrier properties, superior shrinkage characteristics, and favorable optical qualities. To achieve these objectives, outstanding heat‑sealing performance is also essential, encompassing a broad sealing temperature range and high sealing strength. Poor heat‑sealing performance can lead to issues such as bag‑flinging and package rupture on the production line, thereby reducing manufacturing efficiency; insufficient sealing strength may compromise the overall seal integrity of the pack, allowing ambient water vapor to penetrate through poorly sealed areas, so that even with highly effective moisture‑barrier materials, cigarettes remain prone to moisture uptake and subsequent mold growth. Moreover, manufacturers often set different heat‑sealing temperatures, and even when identical settings are used, variations in the temperature‑control systems of individual cigarette packaging machines result in differing actual sealing temperatures experienced by the film. Consequently, if the heat‑sealing temperature window of the packaging film is narrow, the allowable adjustment range for the packaging machine becomes limited: slightly higher temperatures can cause surface wrinkling, detracting from the package’s appearance, while slightly lower temperatures may yield inadequate sealing strength and loose seals. Therefore, robust heat‑sealing performance and appropriately optimized sealing parameters are indispensable for ensuring reliable seal integrity in cigarette packs.