Patent ID: 6541086
Filing Date: 2003-04-01
Classification: B32B,Y10S,Y10T

Abstract:
A packing film comprising:a first oriented plastic film formed as a first surface layer and provided with a first coarse surface portion; an aluminum foil formed as a first intermediate layer; a second oriented plastic film of a non-polar plastic material formed as a second intermediate layer and provided with a second coarse surface portion that is formed with a through hole and is to be overlapped with the first coarse portion of the first oriented plastic film when laminated, the second intermediate layer formed of a linear low density polyethylene, low density polyethylene, or polypropylene film; and a non-oriented plastic film formed as a second surface layer that is bonded through a binder layer, wherein (1) said first oriented film, said aluminum foil, said second oriented plastic film and said non-oriented plastic film are laminated in this order so as to provide a laminated multi-layer structure, (2) an overlapped area of said first and second coarse surface portions constitutes an area to be opened, and (3) said first oriented plastic film is laminated to the aluminum foil through an isocyanate binder having a solid component of 30 to 60 weight %.