Three-dimensional net, and composite structural material using the same

The present invention relates to a three-dimensional net made by warp knitting, particularly a three-dimensional net that is superior in structural stability and shape retainability in three-dimensional cords defining three-dimensional mesh spaces, press-load resistance and elasticity and that can be widely suitably used for various applications, and it also relates to a composite structural material using said net. Invention-wise three-dimensional net made by warp knitting has high shape retainability in three-dimensional cords defining three-dimensional mesh spaces, capability of suppressing direction dependency, superiority in structural stability and pressure resistance, capability of retaining a suitable degree of elasticity and formation of three-dimensional cords simply by imparting tension, high void content, and lightweight, which are suitable for various applications. Invention-wise three-dimensional net formed by warp knitting comprises a first mesh web, a second mesh web and connecting yarns connecting the first and second mesh webs and , on front and back sides of the net, with a required spacing therebetween; further comprises three-dimensional cords each formed by braids on the first mesh web and the second mesh web and and by the connecting yarns front-to-back-wise passed between the braids and of the first and second mesh webs and , said first mesh web having larger mesh openings than those of the second mesh web . At least partly in each of said three-dimensional cords , said connecting yarns are passed from a single braid on the first mesh web to a plurality of braids on the second mesh web so that said three-dimensional cord has a width of at least one mesh openings on the first mesh web