TRANSVERSELY TEARABLE FILM AND ITS PRODUCTION

摘要

PURPOSE:To produce a transversely tearable film for wrapping which is enhanced in transverse tear and little in rupture in a stretching stage or the like at low cost by controlling strength, elongation and linearity in the transverse direction and the longitudinal direction of the thermoplastic film to the specified range. CONSTITUTION:A transversely tearable film for wrapping is obtained wherein tensile strength in the transverse direction of the film is 35Kgf/mm<2> or below, elongation is 35% or more, strength in the longitudinal direction of the film is 3-6Kgf/mm<2>, tear strength in the transverse direction is 2000gf/mm or below and linearity of tear in the transverse direction is 30% or below. The transversely tearable film 11 for wrapping is produced by stretching a raw film 5 in the transverse direction in the range of two to five times in a state wherein the raw film 5 is mechanically folded in the longitudinal direction in the range of 5% to 50% when the raw film 5 is transversely stretched by a transversely stretching device 6 in a state wherein the same is folded. In this case, it is preferable for stabilizing the quality that the film is shrunk in the longitudinal direction by 5% or more after transverse stretching.