| 摘要 |
FIELD: textiles, paper.SUBSTANCE: canvas with random orientation of the fibres according to the present invention comprises: reinforcing fibres having an average length of 5 mm to 100 mm; and the thermoplastic resin; in which the surface mass of fibres is 25-3000 g/m, with the number of fibres contained in the bundle (A) of the reinforcing fibres, equivalent to or greater than the critical number of individual fibres, determined by the formula (1), the volume fraction of fibres in the bundles (A) of the reinforcing fibres of the total volume of reinforcing fibres in the canvas is from about 30 vol. % to less than 90 vol. %, and the average number (N) of fibres in the bundle (A) of the reinforcing fibres meets the formula (2) where: the critical number of individual fibres =600/D (1) 0.7×10/D<N<1×10/D, (2) where D is the mean diameter (mcm) of the reinforcing fibre.EFFECT: creating a canvas with random orientation of the fibres used as a preform for manufacturing a product of a given shape from the composite material reinforced with fibres.5 cl, 4 dwg |
