PRODUCTION OF A COMPOSITE MATERIAL CONTAINING VARIOUS FUNCTIONAL AREAS Russian patent published in 2022 - IPC B29C70/24 

FIELD: composite materials.

SUBSTANCE: group of inventions relates to a method for manufacturing a product and to a use of a dry preform. Product comprises a fibre-reinforced matrix of a polymer material. The polymer material has a melting point below the melting point of the material comprising the reinforcing fibres. The product additionally comprises at least two areas with various properties; wherein at least one area contains at least 50% of the polymer material by weight of the final product. The method includes the stage of producing a knitted product in three dimensions and as a continuous item by weft knitting. The knitted article constitutes a dry preform corresponding to the shape of the product being created. The dry preform comprises at least two regions of different compositions. The method includes the stage of moulding by heating under pressure to reach at least the melting point of the polymer material without reaching the melting point of the reinforcing material, and cooling the product created herein.

EFFECT: group of inventions provides composite materials with various interpenetrating operating capabilities without the need to assemble the pre-produced parts separately.

15 cl, 5 dwg, 4 ex