| abstract |
A foam core for a composite laminated article, the foam core having opposing major surfaces, each surface having a network of molded grooves forming a diamond grid configuration on each of the opposing major surfaces, wherein the network of grooves includes a first set of mutually parallel first grooves and a second set of mutually parallel second grooves, the first and second grooves being mutually inclined at an acute angle and intersecting to form a series of a plurality of diamond shapes therebetween, and a third set of mutually parallel third grooves extending in a longitudinal direction, each third groove intersecting with a plurality of adjacent intersections of the first and second grooves and, at each intersection, bisecting the acute angle between the first and second grooves, and further including the core foam a series of through holes that extend through the thickness of the foam core between opposing major surfaces, where at least some, optionally all, of the molded grooves are printed grooves formed by pressing into the respective surface of the foam core. |