Method for producing cellulose-fiber flat structure

• Main Authors: KAWAMUKAI TAKASHI, OGITA NAOHIDE, FUJIWARA TSUYOSHI
• Format: Patent
• Language: English
• Published: 04.03.2014
• Subjects: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS; IMPREGNATING OR COATING OF PAPER; LOOMS; MECHANICAL FINISHING OF YARNS OR ROPES; METHODS OF WEAVING; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; SEPARATION; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; WARPING OR BEAMING; WEAVING; WOVEN FABRICS; YARNS; YARNS OR THREADS

The present invention relates to a method of producing a cellulose-fiber flat structure, the method including obtaining a cellulose-fiber flat structure by filtering a fine cellulose-fiber dispersion containing fine cellulose fibers having an average fiber diameter of 4 to 100 nm, using a filter material having a water permeability of not more than 100 ml/m2·s and an initial tensile modulus of 20 MPa or greater. The present invention is able to produce a cellulose-fiber flat structure by efficiently recovering fine cellulose fibers from a dispersion containing fine cellulose fibers having an average fiber diameter at the nano level. The method of producing a cellulose-fiber flat structure can also be applied to a continuous process.