| abstract |
A curable composite material comprising: a woven fabric having two opposite faces and a fabric pattern in which one or more filament bundles in a first direction of the fabric float on one or more filament bundles in a second direction of the tissue, then they pass under one or more bundles of filaments in the second direction of the tissue; wherein a pocket is defined on the surface of the fabric when a first bundle of filaments in the first direction of tissue passes over a second bundle of filaments in the second direction of tissue and then under a third bundle of filaments adjacent in the second direction of tissue, or when the first bundle of filaments passes under a second bundle of filaments in the second direction of the tissue and then over a third bundle of filaments adjacent in the second direction of the tissue, and the location of the pocket is defined by the portion of the first bundle of filaments that rises or falls between the second and third bundles of adjacent filaments; a curable hot melt resin film that covers one or both sides of the fabric and partially penetrates through the thickness of the fabric leaving an internal section of the fabric, in the thickness direction, substantially free of the resin film , in which the hot melt resin film is substantially solid at a temperature within the range of 20 ° C-25 ° C and comes to flow at an elevated temperature below the initial cure temperature of the resin film ; and a series of openings in at least one of the resin films, each opening exposes at least a portion of the pocket on the surface of the fabric and configured to create a fluid flow path from the internal section of the fabric to at least one surface exterior of the composite material, or from at least one outer surface of the composite material to the inner section, or from an outer surface of the composite material to an opposite outer surface, or a combination thereof. |