| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing process of a synthetic resin bag which does not need especially strong pressure in the heat sealing, and which can accelerate a manufacturing speed. SOLUTION: The manufacturing process of manufacturing the bag sealed by heat seal processing the entire region of an outer edge part from the synthetic resin sheet S except an opening part opened in at least one direction of the outer edge part or a predetermined region conducts sealed part pressing steps XA, XB of pressing the sealed part of the synthetic resin sheet S in an at least thickness direction, and a step XC of heat sealing the sealed part in which the thickness size has been reduced from that before the sealed part pressing steps XA, XB by conducting the sealed part pressing steps XA, XB. COPYRIGHT: (C)2009,JPO&INPIT |
