CARBON FIBER COMPOSITE MATERIAL

• Main Authors: SUGA YUKI, TANAKA FUMIHIKO, SAKATA HIROAKI, HIRANO KIMINORI
• Format: Patent
• Language: English; Japanese
• Published: 28.03.2023
• 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

To provide a carbon fiber composite material that can improve impact resistance.SOLUTION: A carbon fiber composite material includes: a carbon fiber having the strand strength of 7.5 to 8.5 GPa, the elongation of 2.65 to 3.20%, and the single fiber diameter of 4.0 to 6.0 μm; and an epoxy resin composition having amine type epoxy resin [A], thermoplastic resin [B] which dissolves into epoxy resin, and epoxy resin curing agent [C], where the degree of cure of the epoxy resin composition is 90% or more, and the storage elastic modulus of a cured product of the epoxy resin at 275°C when the cured product is heated at the speed of 5°C/min. by using a dynamic viscoelasticity measuring apparatus according to SACMA SRM 18R-94, and measured at the torsional mode of 1.0 Hz is 1 to 10 MPa. The carbon fiber composite material can improve impact resistance.SELECTED DRAWING: None 【課題】耐衝撃性を改善できる炭素繊維複合材料を提供する。【解決手段】ストランド強度が７．５～８．５ＧＰａ、伸度２．６５～３．２０％、単繊維直径が４．０～６．０μｍである炭素繊維と、アミン型エポキシ樹脂［Ａ］、エポキシ樹脂に溶解する熱可塑性樹脂［Ｂ］およびエポキシ樹脂硬化剤［Ｃ］を有するエポキシ樹脂組成物を含み、かつ該エポキシ樹脂組成物の硬化度が９０％以上であり、該エポキシ樹脂の硬化物をＳＡＣＭＡ ＳＲＭ １８Ｒ－９４に従って、動的粘弾性測定装置を用い５℃／分の速度で加熱し、１．０Ｈｚのねじりモードで測定した２７５℃における貯蔵弾性率が１～１０ＭＰａである、炭素繊維複合材料。耐衝撃性を改善できる炭素繊維複合材料を提供する。【選択図】なし