Film formed from polyethylene-2,6-naphthalate resin, process for producing said film and package using said film

摘要

PCT No. PCT/JP94/00951 Sec. 371 Date Apr. 7, 1995 Sec. 102(e) Date Apr. 7, 1995 PCT Filed Jun. 10, 1994 PCT Pub. No. WO94/29374 PCT Pub. Date Dec. 22, 1994Packaging films for press-through packaging comprise a polyethylene-2,6-naphthalate film having an intrinsic viscosity eta of 0.31 to 0.6 wherein the film is: (1) stretched in mutually perpendicular directions each with draw ratios of 1 to 3 times; or (2) stretched in the longitudinal direction at draw ratios of 3 to 6 times and in the transverse direction at draw ratios of 1 to 1.8 times. The films have a thickness of 5-150 mu m and may be incorporated into multi-layer cover films comprising the polyethylene-2,6-naphthalate film, a barrier layer, a reinforcing layer, and a sealing or adhesive layer.