CARBON FIBER BUNDLE, MANUFACTURING METHOD THEREFOR, PREPEG, AND CARBON-FIBER-REINFORCED COMPOSITE MATERIAL

• Main Authors: OKUDA Haruki, TANAKA Fumihiko, SADO Yuki, MATSUMOTO Naohiro
• Format: Patent
• Language: English; Spanish
• Published: 25.09.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

[Solution] A carbon fiber bundle in which the relationship between a crystallite size Lc (nm), a single fiber compressive strength Fc (GPa) measured by a single fiber composite compression fragmentation method, and an initial elastic modulus E0 (GPa) in resin-impregnated strand tensile testing simultaneously satisfies formulae (1) to (3), and Lc is at most 4.00 nm: (1) Fc ≥ 1.3 × 10 / Lc - 0.3; (2) E0 ≤ 80 × Lc + 155; and (3) E0 ≥ 330. The present invention provides: a carbon fiber bundle having an excellent tensile elastic modulus and compressive strength in a carbon-fiber-reinforced composite material; and a manufacturing method therefor. Se da a conocer un haz de fibras de carbono en el que una relación entre un tamaño de cristalito Lc (nm), una resistencia a la compresión de una sola fibra Fc (GPa) medida por un método de fragmentación por compresión de materiales compuestos de una sola fibra y un módulo inicial E0 (GPa) en una prueba de tracción de hebras impregnadas de resina satisface simultáneamente las siguientes fórmulas (1) a (3), y Lc es 4.00 nm o menos. Fc = 1.3 x 10/Lc-0.3 (1) E0 = 80 x Lc +155 (2) E0 = 330 (3) La presente invención proporciona un haz de fibras de carbono que tiene un módulo de tracción y una resistencia a la compresión excelentes de un material compuesto reforzado con fibra de carbono, y un método de fabricación para el mismo.