FIBROUS CELLULOSE, FIBROUS CELLULOSE DISPERSION, AND SHEET

• Main Authors: TSUTSUMI Yoshiyuki, MATSUBARA Yusuke, NOGUCHI Mayo, YAMANE Kazuo, SHIRAO Takeshi, OHBUCHI Takayuki
• Format: Patent
• Language: English; French; Japanese
• Published: 03.06.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; IMPREGNATING OR COATING OF PAPER; LAUNDERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; POLYSACCHARIDES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS

The present invention addresses the problem of providing a high-concentration microfibrous cellulose dispersion in which microfibrous celluloses are uniformly dispersed. The present invention pertains to a fibrous cellulose having a fiber width of at most 1,000 nm and having an ionic substituent, wherein the introduced amount of the ionic substituent is at least 1.00 mmol/g, and when the fibrous cellulose is made into an aqueous dispersion having a concentration of 0.5 mass%, the viscosity of the aqueous dispersion at 23ºC is 108-1,000 mPa∙s. La présente invention aborde le problème de la fourniture d'une dispersion de cellulose microfibreuse à haute concentration dans laquelle des celluloses microfibreuses sont uniformément dispersées. La présente invention concerne une cellulose fibreuse ayant une largeur de fibre d'au plus 1000 nm et ayant un substituant ionique, la quantité introduite du substituant ionique étant d'au moins 1,00 mmol/g ; et lorsque la cellulose fibreuse est transformée en une dispersion aqueuse ayant une concentration de 0,5 % en masse, la viscosité de la dispersion aqueuse à 23 °C est de 108 à 1000 mPa∙s. 本発明は、高濃度の微細繊維状セルロース分散液であって、微細繊維状セルロースが均一に分散した微細繊維状セルロース分散液を提供することを課題とする。本発明は、繊維幅が１０００ｎｍ以下であり、イオン性置換基を有する繊維状セルロースであって、イオン性置換基の導入量は１．００ｍｍｏｌ／ｇ以上であり、繊維状セルロースを０．５質量％濃度の水分散液とした場合、２３℃における水分散液の粘度が１０８ｍＰａ・ｓ以上１０００ｍＰａ・ｓ以下である、繊維状セルロースに関する。