| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a packaging bag for a heavy load which can be recycled easily after use, from which excess air accompanied by a filled article and encapsulated at the filling can be discharged easily and in which impact applied to the packaging bag for the heavy load at storing or transportation can be relaxed to prevent an accident such as breakage of the bag or the like and further in which water is hardly penetrated from a ventilation part. <P>SOLUTION: The package bag comprises two pieces of bag forming laminated films 1, 1 composed of an bag outer film layer made of a linear low density polyethylene and a bag inner film layer made of a linear low density polyethylene having a melting point of 85°C to 115°C, which is lower than the melting point of the bag outer film layer, and an air permeable tape-like sheet 2 made of a polyethylene having a nearly equal melting point to the melting point of the bag inner film layer which is provided on the opposing side edge part of the bag inner film layer of the two pieces of bag forming laminated films 1, 1. A non-heat-seal part 4 is formed on a heat-seal part 3 of the side edge part of the two pieces of bag forming laminated films 1, 1 at a predetermined distance and air can be permeate between the non-heat-seal part 4 and the inner part of the bag via the air permeable tape-like sheet 2. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
