CARBON FIBER-REINFORCED POLYESTER RESIN, AND METHOD FOR MANUFACTURING INJECTION MOLDED OBJECT THEREOF

• Main Author: FUJIMAKI TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 31.03.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a thermoplastic composite material (CFRTP) of a polyester resin and reinforced carbon fiber, which is expected to increase its application as a civil engineering and construction material, a material for an automobile, a material for aerospace, and other advanced materials, when a strength, corrosion resistance and the like are further improved.SOLUTION: A polyester/carbon fiber composite material (CFRTP) is formed by chemically coupling a terminal carboxyl group of polyester and a carbon fiber holding a carboxyl group with an epoxy resin and a catalyst acting as a coupling agent through a reaction extrusion method. An injection molded object having significantly improved physical properties such as a strength is formed from a composite material having improved melt viscosity and molding workability. A chopped product of a reproduced carbon fiber and an inexpensive recovered carbon filament from a carbon fiber-reinforced thermosetting composite material (CFRP) of an end material at the time of assembly of an aircraft is used, and the cost can be drastically reduced.SELECTED DRAWING: None 【課題】ポリエステル樹脂および炭素繊維強化による熱可塑性複合材（ＣＦＲＴＰ）は、更に強度および耐食性等を向上すれば、土木・建築資材、自動車用資材、航空宇宙用資材およびその他先端材料としての用途が拡大することが期待される。【解決手段】ポリエステルの末端カルボキシル基とカルボキシル基を保有させた炭素繊維とを、結合剤としてのエポキシ樹脂と触媒とで反応押出法に依り化学結合させてポリエステル・炭素繊維複合材（ＣＦＲＴＰ）とする。この溶融粘度と成形加工性が改善された複合材から、強度等の物性が大幅に改善された射出成形体とする。尚、航空機の組立時端材の炭素繊維強化熱硬化性複合材（ＣＦＲＰ）からの再生炭素繊維および安価な回収炭素長繊維のチョップ品を使用して、大幅なコストダウンが可能と成る。【選択図】なし