| 摘要 |
A patch bag (14) comprises a heat-shrinkable bag comprising a tubular bag film (18), and a heat-shrinkable patch (22) comprising a patch film, the patch being adhered to the bag, the patch bag having a seal (26) which is through both the patches as well as through both lay-flat sides of the bag. The seal has a strength of at least 26 inches of water and/or the bag is an end seal bag in which the seal through the patches is the only seal across the bottom of the bag. A process for making the bag includes sealing an inside surface of the film tubing to itself, the sealing being carried out by applying heat to each of the patch outside surfaces, the heat being applied by a first means for heating and a second means for heating, the first and second means for heating being in alignment with one another, with the patches and bag tubing therebetween during sealing. |
