Corrugated paperboard strength enhancing process

Details Corrugated paperboard strength enhancing process Corrugated paperboard strength enhancing process

B - Operations, Transporting

32

B

B32B 29/08 (2006.01) B05B 7/02 (2006.01) B05B 7/08 (2006.01) B05B 15/04 (2006.01)

Patent

CA 2102102

2102102 9219449 PCTABS00017 A corrugated paperboard strength enhancing process includes at least one resin application station located within the confines of the corrugator at a position where it is operable to apply a preselected amount of a strength enchancing resin to at least one side of the medium after it has been fluted and most preferably before adhesive has been applied to the medium for securing liner paper thereto. At least one liner is adhered to the set of opposed flute tips. Thereafter the combined board with the resin compound on selected transverse portions of the fluted medium is allowed to cure, under selected temperature and moisture conditions and without the application of pressure that would crush the fluted medium. A suitable resin for the intended purpose is an isocyanate compound. The strength-enhanced corrugated paperboard can be efficiently repulped.

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