MULTIAXIAL MULTILAYER NONWOVEN FABRIC CONTAINING POLYMER NONWOVEN MATERIAL Russian patent published in 2015 - IPC B29C70/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a multilayer nonwoven fabric consisting of multiple layers of reinforcement threads between which there is a layer of nonwoven thermoplastic polymer material. The technical result is achieved through a multilayer nonwoven fabric consisting of stacked layers of parallel reinforcement threads. The multilayer nonwoven fabric on layers and/or between the layers of reinforcement threads has a layer of nonwoven material made of thermoplastic polymer material. The nonwoven material contains a first and a second polymer component, the melting points of which are below the melting point or decomposition temperature of the reinforcement threads. The first polymer component has a lower melting point than the second polymer component. The first polymer component is soluble in a matrix resin based on epoxide, cyanate ester or benzoxazine or in a mixture of said matrix resins, and the second polymer component is insoluble in said matrix resin.

EFFECT: high drapability of the fabric and shape stability thereof after moulding into a preform, high permeability when soaking with a matrix resin, high strength and impact viscosity of a structural component made from the fabric.

15 cl