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PROBLEM TO BE SOLVED: To provide newsprint using mechanical pulp produced from Cryptomeria wood, which has been difficult to use as pulp as a raw material and has high opacity and strength. SOLUTION: The newsprint prepared by adding fillers to pulp of raw material is characterized by using mechanica...

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Bibliographische Detailangaben
1. Verfasser:	OTA HARUKI
Format:	Patent
Sprache:	eng
Schlagworte:	IMPREGNATING OR COATING OF PAPER PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide newsprint using mechanical pulp produced from Cryptomeria wood, which has been difficult to use as pulp as a raw material and has high opacity and strength. SOLUTION: The newsprint prepared by adding fillers to pulp of raw material is characterized by using mechanical pulp produced from Cryptomeria wood chips and Pinus wood chips in an absolute dry weight ratio of Cryptomeria wood chips: Pinus wood chips of 5:95 to 50:50 as pulp of raw materials, and containing white carbon having a volume-average particle diameter of 15 to 25 μm and inorganic particles having a volume-average particle diameter of 1.7 to 12.5 μm as fillers. The inorganic particles may be silica-compounded reclaimed particles prepared by compounding silica on the surfaces of reclaimed particles obtained through dehydration, drying, combustion and crushing processes for paper-making sludges as a main raw material. COPYRIGHT: (C)2011,JPO&INPIT