| 摘要 |
PURPOSE: To enhance a stacking strength in a welded part by a method wherein a linear low-density polyethylene layer having anα-olefin of a specific number of carbon atoms in a side chain and a high film strength is used for bonding surfaces of a body cloth and a liner cloth. CONSTITUTION: For retaining a shape in a bag body, a laminated film formed by laminating a linear low-density polyethylene layer 7 having a 8Cα-olefin in a side chain on a surface of a polyethylene cloth 5 through a linear low- density polyethylene layer 6 having a 4Cα-olefin in a side chain is used for bonding surfaces of a body cloth 2 and a liner cloth 3. By welding the 8C linear low-density polyethylene layers 7 of the laminated films to each other, the liner cloth 3 is bonded to the body cloth 2. In this manner, a flexible container bag having a large release strength can be obtained. As a result, the container bag can be kept in a square shape. Therefore, a stacking strength can be enhanced, and a storage efficiency can be raised.
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