| 摘要 |
PURPOSE:To provide a fiber reinforced thermoplastic resin molded part with excellent reinforcing effect by a constitution of the fiber reinforced molded part wherein cloth, which is woven in such a manner that a space is specially provided between yarns adjacent to each other, is empolyed as an intermediate reinforcing layer and pressed under the state that thermoplastic resins, which are heated up to their flow temperatures, are placed onto both the sides of the cloth. CONSTITUTION:Firstly, polyproylene sheets 2 are dried by heating in a far infrared oven. A sheet of glass fibers 3, which is placed between two above-mentioned sheets, is set in a mold 4 so as to be molded under pressure. The reinforcing effect largely depends upon the impregnating property of polypropylene into glass fiber bundle. Said impregnating property is also influenced by the flow property of polypropylene or by MFR (melt flow rate). The larger MFR is, the larger or the more favorable the reinforcing effect becomes. The numerals 3a, 3b, 3c,... in a fiber reinforced molded part A represent glass fiber bundles, which are woven in cloth having spaces 7a, 7b,.... The molded part A is made of polypropylene, which is fixed by fusion by passing through the spaces from the upper layer and the lower layer polypropylene sheets by means of stamping. |
