Injection formed body and fabrication method for same
A technology of injection molding and manufacturing methods, applied in the direction of layered products, thin material handling, transportation and packaging, etc., can solve the problems of shape limitation of molded objects, small amount of disturbed orientation, and no record of fiber reinforced resin molding, etc. To achieve the effect of small warpage
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Embodiment 1
[0108]First, the continuous PAN-based carbon fiber bundle as the fibrous filler (b) is heated, and the melted resin is metered by a gear pump and applied. Next, the resin is impregnated into the carbon fiber bundles in an atmosphere heated to a temperature higher than the melting temperature to obtain a continuous composite of the carbon fiber bundles and the resin (impregnation step).
[0109] Next, the thermoplastic resin (a) is charged into the hopper of the extruder, extruded into the coating die in the state of melting and kneading, and at the same time, the above-mentioned covered composite is continuously supplied to the above-mentioned coating die. The resin composition of the thermoplastic resin (a) was used to cover the composite, and the output of the extruder and the supply of the composite were adjusted to obtain a continuous fiber-reinforced resin strand with a carbon fiber content of 20 wt% (coating step).
[0110] Then, the aforementioned continuous fiber-reinf...
Embodiment 2～5 and comparative example 1～3
[0113] The long-fiber pellets obtained in Example 1 were used, and molding was performed under the same conditions as in Example 1 except that the molding conditions shown in Table 1 were used. Table 1 shows the evaluation results of this molded article. Compared with Comparative Examples 1-3, these Examples are excellent in mechanical characteristics and warpage amount. In addition, the results of the orientation measurement of the fibers of the injection molded article of Comparative Example 1 are as follows: Figure 19 as shown,
Embodiment 6
[0115] It was the same as Example 2 except that the carbon fiber content of the continuous fiber-reinforced resin strand was 30 wt %. As shown in Table 1, the evaluation results of this molded article were excellent in mechanical properties and warpage.
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