SIZING AGENT-COATED CARBON FIBER BUNDLE AND MANUFACTURING METHOD THEREFOR

• Main Authors: MIZUTA HISAFUMI, SUEOKA MASANORI, NOGUCHI TOMOHISA, SADO YUKI, SUZUKI NORIMASA
• Format: Patent
• Language: English; Japanese
• Published: 12.12.2019
• Subjects: FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; TEXTILES; 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

To provide a sizing agent-coated carbon fiber bundle exhibiting high adhesiveness to a thermoplastic resin and exhibiting good openability in an opening process during process to a composite material.SOLUTION: There is provided a sizing agent-coated carbon fiber bundle in which a sizing agent containing a water soluble compound (A) having an amino group or an amide group, and a non-ionic smoothing agent (B) is applied to a carbon fiber bundle, satisfying all of following (i) to (iv). (i) total amount of the water soluble compound (A) and the non-ionic smoothing agent (B) is 50 pts.mass or more based on 100 pts.mass of total amount of the sizing agent. (ii) drape value at 25°C is 4 to 8 cm. (iii) friction coefficient between fiber-fiber is 0.30 or less. (iv) friction coefficient between fiber-metal is 0.35 or less.SELECTED DRAWING: None 【課題】熱可塑性樹脂に対し高い接着性を示し、かつ複合材料への加工時の開繊工程において良好な開繊性を示すサイジング剤塗布炭素繊維束を提供する。【解決手段】アミノ基またはアミド基を有する水溶性化合物（Ａ）および非イオン性平滑剤（Ｂ）を含むサイジング剤が炭素繊維束に塗布されてなるサイジング剤塗布炭素繊維束であって、下記（ｉ）〜（ｉｖ）の全てを満たすサイジング剤塗布炭素繊維束。（ｉ）サイジング剤全量１００質量部に対する水溶性化合物（Ａ）および非イオン性平滑剤（Ｂ）の総量が５０質量部以上である。（ｉｉ）２５℃におけるドレープ値が４〜８ｃｍである。（ｉｉｉ）繊維−繊維間摩擦係数が０．３０以下である。（ｉｖ）繊維−金属間摩擦係数が０．３５以下である。【選択図】なし