The invention provides a production method of regenerated ultralow-
gram-weight high-strength corrugated base paper, which can ensure the
physical strength of the base paper and reduce the
impurity treatment load. The method comprises the steps of drum pulping, coarse screening, classifying screening, short
fiber purifying treatment, long
fiber purifying treatment, long
fiber fine screening, shortfiber concentration, long fiber concentration, pulp preparation and
paper machine papermaking. Domestic OCC
waste paper raw materials are made into pulp through a drum pulping device, the pulp is screened by a pressure screen, the pulp subjected to the coarse screen is subjected to classification screening to divide fibers into long fibers and short fibers, short fiber good pulp and long fiber good pulp are proportionately mixed, the mixed pulp is sent to a
papermaking forebay, the pulp is thickened, diluted, dispersed by a before-net, molded by a forming screen, dehydrated at the screen partto obtain wet paper sheets, the wet paper sheets are subjected to steam
drying at a front
drying part and then enter a film transfer surface
sizing machine for surface
sizing, and the paper sheets subjected to surface
sizing enter a rear
drying part for drying.