| 摘要 |
<p>A syphon seltzer package (10) has a polyethylene terephthalate (PET) plastic bottle (12) capable of withstanding elevated pressures, with a neck (16) having an opening (18), into which a valve insert (20) is mounted. The insert (20) is held in place by an electromagnetically welded bond (21). A preform (42) of PET containing finely divided ferromagnetic material particles (44) is provided between surfaces (30 and 38) of the insert (20) and the neck (16). The preform (42) is heated with a strong electromagnetic field to form the electromagnetically welded bond (21).</p> |
