The invention discloses a method for making high-grade packaging paper by mixing high-card pulp and
waste paper, which comprises the following steps: preparing OCC
waste paper pulp, crushing, removing
slag, coarse screening and grading screen the
domestic waste OCC in sequence to form long, medium and short
fiber pulps, and the long
fiber pulp / medium
fiber pulp / short fiber pulp is sequentially passed through a
slag remover, a fine screen, a multi-disc
concentrator, a hot dispersion, a pre-beating
pool and a disc
grinding and then enters a post-beating
pool; preparing natural wood pulp, crushing the purchased commercial wood pulp
raw material, and entering the post-beating
pool after disc
grinding and beating; preparing high-card pulp, crushing the wood
chip raw material After washing and pre-impregnation → cooking → medium-consistency
grinding → screening and purification → washing and concentration, high-card pulp is formed. The high-card pulp is mixed and beaten with long-fiber pulp and short-fiber pulp to form high-long mixed pulp and high-short mixed pulp respectively; finally, the prepared natural wood pulp and medium-fiber pulp, high-long mixed pulp and medium-fiber pulp and high-short mixed pulp, high-long mixed pulp and high-short mixed pulp are respectively put into the mixed pulp pool of the surface / core / bottom layer
paper machine, and after removing impurities, they are sent to the surface / core / bottom layer wire section for
papermaking, and then go through the pressing section → front
drying →
sizing → post
drying →
calendering → winding to make high-grade packaging paper.