UNIDIRECTIONAL FIBROUS TAPE-CONTAINING FIBROUS WORKPIECE MADE FROM BUNDLES OF REINFORCING FIBRES AND STRUCTURAL ELEMENT MADE FROM COMPOSITE MATERIAL Russian patent published in 2016 - IPC B29C70/08 

FIELD: chemistry.

SUBSTANCE: invention relates to fibrous workpiece for making fibrous composite structures and to structural elements from composite material. Technical result is achieved in fibrous workpiece for making fibrous composite structures, wall of which consists of reinforcing fibres. Wall has first surface and second surface located opposite first surface and thickness passing between these surfaces, and is limited by edges. At that wall has first zone of reinforcing fibres bundles, containing first composition of resins, and second zone from fibrous tape consisting of second resins composition of unidirectionally oriented bundle of reinforcing filaments. At that, bundles of reinforcing fibres in first zone, if seen parallel to length of thickness, are oriented in different directions relative to each other. Every bundle of reinforcing fibres consists of oriented parallel to each other filaments of reinforcing fibres, has length varying from 3 to 50 mm and comprises first composition resins with concentration varying from 1 to 10 wt%, relative to weight of fibre. Wall of fiber workpiece comprises portion of reinforcing fibres of more than 35 vol%. At that, second zone, if seen perpendicular to length of wall thickness, forms discrete area and fibrous tape ends with one of its ends inside wall.

EFFECT: high strength and simplified manufacturing.

17 cl, 2 dwg