| 摘要 |
PROBLEM TO BE SOLVED: To propose a self-standing liquid packing bag with a flat film valve having a one-way function, that can self-stand without being accommodated and fixed in/to a separate external packing container so that the bag can be used independently, and without inhibiting the one-way function of the film valve.SOLUTION: The self-standing liquid material packing bag has the flat film valve having the one-way function which protrudes from the upper part of either side edge of a bag body, and also has a bottom part for self-standing. Two sides of front and back overlapping flat plastic films are adhered so that the peripheral of the protruding part except for a part communicating with the bag body is mutually fused. The protruding part is configured so that a central portion of the communicating part is formed as an extraction passage, and thus formed flat film valve is integrally formed with a bag body. Inner faces of the extraction passage get wet by tilting the bag body to pass a liquidified object to be packed therethrough, and the one-way function inhibits an entry of air by the mutual adhering action which is caused because the liquidified object to be packed intervenes therein all the time. |
