THERMOPLASTIC RESIN COMPOSITION AND ITS MOLDED ARTICLE, AND METHOD FOR PRODUCING THE SAME

• Main Authors: HIROTA MASAYUKI, MURASE HIROAKI, YAMADA MASAHIRO, SOJO DAISAKU, SUGIMOTO MASAYUKI, SAKAMOTO HIROKI, ONAKA JUNKO
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

To provide a resin composition in which a cellulose fiber is contained in a thermoplastic resin with high concentration, the cellulose fiber is dispersed in the thermoplastic resin, and mechanical characteristics are greatly improved.SOLUTION: A resin composition contains a fibrillated fiber comprising: a pulp fiber part which forms a stem by kneading a thermoplastic resin, a pulp and a compound having 9,9-bis(aryl) fluorene skeleton; and a fibril part extending from the surface of the pulp fiber part in a branch form. The fibrillated fiber has a weighted average fiber diameter of the fibrillated fiber is 3-20 μm, and a polydispersity indicating a ratio of the weighted average fiber diameter of the fibrillated fiber to an arithmetic average fiber diameter of the pulp fiber part is 3 or more.SELECTED DRAWING: None 【課題】セルロース繊維が熱可塑性樹脂に高濃度で含まれ、熱可塑性樹脂中にセルロース繊維が分散され、機械的特性が大幅に向上した樹脂組成物を提供する。【解決手段】熱可塑性樹脂とパルプと９,９−ビス（アリール）フルオレン骨格を有する化合物とを混練し、幹部を形成するパルプ繊維部と、このパルプ繊維部の表面から枝状に延びるフィブリル部とを備えたフィブリル化繊維を含む樹脂組成物を得る。前記フィブリル化繊維は、ており、前記フィブリル化繊維の加重平均繊維径は、３〜２０μｍであり、かつ前記パルプ繊維部の算術平均繊維径に対するフィブリル化繊維の前記加重平均繊維径の割合を表す多分散度は、３以上である。【選択図】なし