Reinforcing fiber laminated sheet, fiber-reinforced resin molded body, and manufacturing method of reinforcing fiber laminated sheet
A fiber-reinforced, laminated sheet technology, applied in the direction of synthetic resin layered products, chemical instruments and methods, coatings, etc., can solve the problems that the three-dimensional shape cannot be fully deformed, expensive, and have adverse effects on mechanical properties
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[0193] Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to this.
[0194] First, evaluation of formability, shape stability, and fiber-reinforced resin molded article of the reinforced fiber laminated sheet is shown below.
[0195] Regarding the shapeability of the reinforcing fiber laminated sheet, evaluation was performed by the following three types of shapes, that is, for a simple element mold (a shape obtained by cutting an ellipsoidal shape along the horizontal direction) ( Figure 7 ), to the model shape mold 1 (imitating the shape of the Z-shaped stringer used in the structure of the skin (skin) and stringer (stringer) of the aircraft) ( Figure 8 ), and to the model shape mold 2 (to imitate the shape of the trunk lid of a car) ( Figure 9 ) of the endowment. The evaluation criteria for the formability of the reinforcing fiber laminated sheet are shown below.
[0196] AA: No wrinkle
[0197] A: There are no more ...
reference example 1
[0210] [Reference Example 1] Reinforcing Fiber Bundle 1
[0211] Carbon fibers "Torayca" T700SC (number of single yarns: 24,000) manufactured by Toray Co., Ltd. were opened so as to have a width of 25 mm by an opener equipped with an opener roll. Next, a bisphenol A type epoxy resin (XB3366 manufactured by Huntsman Co., Ltd. XB3366, T g : 80°C) to form a fixed material. Furthermore, the carbon fibers to which the fixing material was adhered were heated at 200° C. in a heating device to melt a part of the fixing material so that the fixing material would not come off in the subsequent process, thereby obtaining the reinforcing fiber bundle 1 .
reference example 2
[0212] [Reference example 2] Matrix resin
[0213] As the matrix resin, a two-component epoxy resin (main ingredient: jER828 manufactured by Mitsubishi Chemical Corporation, curing agent: anhydride-based curing agent manufactured by Toray Corporation) was used.
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