カバーリング複合糸を用いた織物状 CFRTP の開発

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タイトル別名
  • Development of Woven CFRTP Composites Used with Covering Composite Yarns.
  • カバーリング フクゴウシ オ モチイタ オリモノジョウ CFRTP ノ カイハツ

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<p>A novel CFRTP made from fabric sheets woven from covering composite yarns consisting of carbon fibers and resin yarns was developed in this study. The developed CFRTP was expected to have high strength because the resin easily impregnates into the clearance between carbon fibers due to the fact that the carbon fibers and resin yarns are closely located in the composite yarn. By evaluating the influence of molding conditions on the internal state of the produced CFRTP, optimum molding conditions for the highest strength were determined. First, by evaluating the void fraction in the range of 230 to 250℃, the optimum molding temperature was determined to be 230℃. Next, by evaluating the impregnation ratio, the optimum molding time and pressure were determined to be 15 minutes and 3 MPa, respectively. The impregnation ratio of resin in the produced CFRTP was sufficiently high, almost 100%. And then the relationship between cooling time in the molding process and bending strength of the produced CFRTP was investigated. The bending strength was evaluated by three-point bending test. The results showed that the bending strength of CFRTP was higher when the cooling time was longer. When the cooling time was shorter, the resin was easily shrunk by heat, resulting in the peeling of resin from carbon fibers. The bending strength of CFRTP produced under the best condition was 683 MPa, which is similar to the strength achieved by conventional methods such as film-stacking and the prepreg method. The study showed that the produced CFRTP had sufficient high strength without taking spreading and pre-impregnation processes, and therefore the proposed method for the novel CFRTP was promising.</p>

収録刊行物

  • 成形加工

    成形加工 30 (3), 131-135, 2018-02-20

    一般社団法人 プラスチック成形加工学会

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