| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a mold for welding a structure in which, in the attachment, press, and welding of various ports and the structure such as a tube to a bag main body in the production of bags such as a medical bag, the occurrence of a pinhole, a thin-wall part, etc., is prevented in a welding part on the periphery of it to eliminate problems such as liquid leakage, and a welding method using the mold. <P>SOLUTION: The mold for welding the ports and the structure such as the tube to the bag of a plastic film is composed of a heating part for maintaining the melting temperature of the plastic film and a non-heating part which adjoins it and has a temperature not exceeding the melting temperature. A thermal gradient is formed in the non-heating part. A method for producing the bags, especially the medical bag, using the mold is disclosed. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
