Abstract
Temperature changes of heating plate were investigated during the continuous working of an automatic packaging machine for preparative packing of powder preparations. The packaging machine used was Konishi KC-606-F6. 5 kinds of wrapping paper having various grades of moisture permeability were adopted. Sealing temperature was measured by a thermosenser (Toshiba electric Co. Ltd., Model MGB 3A-1619). The results of the study were as follows: 1) The sealing temperature decreased by 30° to 34° in 10 minutes after starting in the case of glassine laminate. 2) The sealing temperature decreased as the thickness of polyethylene layer of wrapping paper increased. 3) In order to minimize moisture permeation through packages, it is necessary to set up a suitable initial temperature.
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