METHOD FOR DISINTEGRATING PAPER STOCK CONTAINING WET PAPER STRENGTH-ENHANCING PAPER

• Main Authors: MIYAGUCHI KAZUYA, TOGO NAOKO
• Format: Patent
• Language: English
• Published: 30.09.2004
• Edition: 7
• Subjects: APPARATUS THEREFOR; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PAPER-MAKING; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TEXTILES

PROBLEM TO BE SOLVED: To provide a disintegration method in which disintegration treatment of a wet paper strength-enhancing paper which is slightly disintegrable paper and waste paper and damaged paper containing the wet paper strength-enhancing paper can readily be carried out simultaneously with general waste papers without separately carrying out disintegration treatment of these papers and corrosion to disintegration apparatus and its circumferential apparatus is slight. SOLUTION: The method for disintegrating paper stock containing wet paper strength-enhancing paper comprises using a halogenated hydantoin compound represented by general formula (1) (wherein either one of R1and R2is a chlorine atom or a bromine atom and the other is a hydrogen atom, an alkali metal, a chlorine atom, a bromine atom or an alkyl group which may have a 1-12C hydroxyl group; R3and R4may be the same or different and are each a hydrogen atom or a 1-12C alkyl group). preferably bromochloro-5,5-dimethylhydantoin, dichloro-5,5-dimethylhydantoin or dibromo-5,5-dimethylhydantoin in a disintegration step of paper stock. COPYRIGHT: (C)2004,JPO&NCIPI