| 摘要 |
PROBLEM TO BE SOLVED: To obtain double-faced corrugated cardboard capable of reducing equipment cost by enabling the reduction of the line length of a single facer part, having no fear of ignition, enabling higher speed operation than before, requiring no regulation of moisture and not generating warpage. SOLUTION: Corrugated cardboard can be produced by heating a corrugated core 1 having an adhesive applied to the apexes of the corrugations thereof and a back liner 2 dielectrically by the first dielectric heating device 15 arranged to the outer periphery of the arcuate route provided along the curved outer periphery of a corrugation belt 12 to bond them and further dielectrically heating the core and the liner on a flat route by a second dielectric heating device 16 after the passage through the arcuate route to bond and laminate them at a high speed. By using a starch size employing calcium as an alkali component, ignition is eliminated even in a high electric field and the corrugated cardboard can be produced at a high speed in a good bonded state.
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