| 摘要 |
PURPOSE:To make a bag small and to hermetically reseal said bag in a simple manner, in thermally bonding a hermetically sealed flat bag made of a synthetic resin sheet or laminate composite film material under pressure, by inserting a wire in the center of a part to be thermally bonded under pressure. CONSTITUTION:A bag 1 has a bag main body 2 sealed by thermally bonding the peripheral edge part 2A to be thermally bonded under pressure of a laminate member formed by laminating a polyethylene film to a synthetic resin sheet or by thermally bonding the upper and lower parts of said laminate member and the part 2A to be thermally bonded under pressure at the center of the back surface thereof. At the time of the formation of the bag main body 2, a wire 3 is inserted between the synthetic resin sheet and polyethylene film at the central part excepting upper and lower parts of about 4 cm of the part 2A to be thermally bonded under pressure to perform thermal bonding under pressure while the wire 3 is temporarily fixed to the synthetic resin sheet by a magnet or instantaneous adhesive. After opening and use, when the part having the wire 3 inserted therein is lightly folded several times by a hand, the bag 1 becomes small and the commodity remaining in the bag main body 2 can be hermetically resealed in a simple manner and can be preserved under a good condition.
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