| 摘要 |
<p>PURPOSE:To easily and exactly form an opening from which inclusions are taken out by a method in which a tearing tape for forming an opening by tearing it when needed is bonded to the inside of one side of a bag. CONSTITUTION:A thermoplastic synthetic resin film 11 and a composite tape 12 are sent out toward paired extrusion rolls 13 and 14. During the sending period, cuts (a) and (b) in parallel with the lengthwise direction of the tape 12 are continuously provided in the composite tape 12 by a cutter 15. In this case, the tape is sent out while positioning its hot-melt resin layer on the thermoplastic synthetic resin film 11 side. Before the tape 12 is sent between press rolls 13 and 14, it hot-melt resin layer is melted by heating by a heater 16, e.g., dryer, etc., and the tape 12 is bonded to the film 11 through the hot-melt resin layer.</p> |
