| 摘要 |
PROBLEM TO BE SOLVED: To provide a reinforcing fiber orientation sheet for a composite material being a lightweight reinforcing material, hard to get out of shape, hard to cause the movement of reinforcing fibers and not becoming an increase in material cost. SOLUTION: A reinforcing fiber bundle is fibrillated and expanded so that the width per 1,000 monofilaments becomes 1.3 mm or above to manufacture an uniaxially oriented reinforcing fiber sheet 4. A fiber web with a basis weight of 10 g/m<SP>2</SP>or below comprising a hot melt adhesive is bonded to the uniaxially oriented reinforcing fiber sheet 4 to constitute the reinforcing fiber oriented sheet 1 for the composite material. The fiber web 5 is preferably formed so that the thickness thereof is 70μm or below, a fiber diameter is 40μm or below and a web opening ratio is 30% or above. A multi-axial laminated reinforcing fiber sheet 3 may be constituted by superposing a plurality of the reinforcing fiber orientation sheets 1 one upon another so that the fiber orientation axes thereof are differentiated and thermocompression bonded. COPYRIGHT: (C)2005,JPO&NCIPI
|
