FIELD: chemistry.
SUBSTANCE: invention relates to prepregs containing fibres and a resin matrix which, when stacked and subsequently cured, form composite materials, specifically with improved resistance to breakdown caused by lightning strikes. The prepreg has a structural layer of assembled unidirectional conducting fibres and includes a thermosetting resin in internodes. The first external resin layer includes a thermosetting resin and is significantly free of unidirectional conducting fibres which, when cured at high temperature, yields a cured composite material containing a cured structural layer of assembled unidirectional conducting fibres and a first external layer of cured resin, which includes unidirectional conducting fibres dispersed therein.
EFFECT: improved mechanical properties with very low density of the material, which widens the field of use thereof, from use in sport and leisure to high-quality components in aerospace industry.
16 cl, 6 dwg, 1 tbl
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