PREPREG, PREFORM, MOLDED PRODUCT, AND METHOD FOR MANUFACTURING PREPREG

摘要

Disclosed is a prepreg comprising a reinforcing fiber base material impregnated with a thermoplastic resin.  The reinforcing fiber base material comprises 0 to 50% by mass of reinforcing fibers having a fiber length of more than 10 mm, 50 to 100% by mass of reinforcing fibers having a fiber length of 2 to 10 mm, and 0 to 50% by mass of reinforcing fibers having a fiber length of less than 2 mm.  In the prepreg, the average of two-dimensional orientation angle that a single yarn (a) of the reinforcing fiber makes with a single yarn (b) of the reinforcing fiber which crosses the single yarn (a) is 10 to 80 degrees.  The prepreg has a thickness h0 (mm) of 0.03 to 1 mm at 23°C and a tensile strength s of not less than 0.01 MPa.  The prepreg can be applied for thin molded products which have been considered unsuitable as a laminated molded product and can provide molded products that have a complicated shape and have isotropically high mechanical properties.