| 摘要 |
PROBLEM TO BE SOLVED: To provide a cartridge packaging bag having a tension therein and a superior anti-pinhole formation capable of packaging a product of which quality is deteriorated through heating under application of a heat shrinkage film without using any wire clip and without any heating treatment. SOLUTION: A laminar film with a longitudinal shrinkage rate of 7% or more and a lateral shrinkage rate of 7% or more under application of boiling of hot water of 90 deg.C for 5 minutes is applied, the film is fed out into a cylindrical shape while being melted in a vertical orientation through an automatic forming, filling and packaging machine, its lower ends are melted and adhered, and after a predetermined amount of content is fed into the cylindrical-formed film together with fed water, the upper portions of the film above the location where the fed water is filled are closed with a second shutter in such a degree as one is which the content may not pass through them but the fed water may pass through them. After this operation, the film is retracted to cause itself to be tensioned, the upper portions of the film filled with content are melted and adhered in a lateral direction without releasing the tensioned state of the film and then the central part of the lateral melting and adhering part 17 is cut. |
