TYPE II UNMODIFIED CELLULOSE MICROFIBERS, AND METHOD FOR MANUFACTURING TYPE II UNMODIFIED CELLULOSE MICROFIBERS AND COMPACT OF SAME

• Main Authors: IWATA Ippei, YAMAZAKI Asuka
• Format: Patent
• Language: English; French; German
• Published: 19.06.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; HUMAN NECESSITIES; HYGIENE; IMPREGNATING OR COATING OF PAPER; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; POLYSACCHARIDES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

There is provided a manufacturing method for a type II unmodified cellulose fine fiber to obtain a cellulose fine fiber via mercerization of a cellulose, wherein a chemically unmodified cellulose fine fiber can be efficiently obtained by simple steps.A manufacturing method for a type II unmodified cellulose fine fiber is characterized as comprising: a mercerization step of mercerizing a cellulose to obtain a mercerized cellulose; a depolymerization step of reducing a degree of polymerization of the mercerized cellulose to 760 or less to obtain a raw cellulose; a defibration step of defibrating the raw cellulose by adding an alkali metal hydroxide so as to achieve a total concentration of 2.5 to 17.5% to obtain a cellulose fine fiber; and a neutralization step of neutralizing the cellulose fine fiber with an acid.