| 摘要 |
PURPOSE:To obtain an inexpensive buffer packing base material capable of being stored in a non-bulky state and having good workbility, by preliminarily forming a layer having a predetermined shape and comprising a non-foamed thermally foamable resin composition to the predetermined position of a base material in matching relation to the shape and dimension of the product to be packed. CONSTITUTION:A powder comprising a hot melt thermally foamable resin composition containing a foaming agent foaming by heating is preliminarily charged to one polarity. On the other hand, the predetermined position or whole of a base material sheet is charged to other polarity and the powder comprising said resin composition is adhered to the predetermined position of said sheet. The whole is heated to a temp. not decomposing the foaming agent contained in said powder but sufficient to melt the resin and pressed to secure the powder to the sheet in a molten state. By this method, because a buffer packing base material 14d, to which a layer comprising a non-foamed hot melt thermally foamable resin composition 29 having a predetermined shape is formed, is obtained, said base material is punched in a developed shape prior to foam the resin composition and folding lines 31 are formed.
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