Three-dimensional network structure

[Problem] To provide a three-dimensional network structure which has excellent hydrolysis resistance and is not susceptible to deterioration due to moisture in the air when used for a long period of time. [Solution] A three-dimensional network structure comprising a resin composition of a polyester-based thermoplastic elastomer and having a three-dimensional random ring-bonded structure comprising continuous lines, the resin composition containing borosilicate glass. The borosilicate glass preferably contains B2O3, SiO2, and an alkali metal oxide. [课题]提供：耐水解性优异、长时间使用时不易引起空气中的水分所导致的劣化的三维网状结构体。[解决方案]一种三维网状结构体，其是由聚酯系热塑性弹性体的树脂组合物构成的，且具有由连续线条构成的三维无规环接合结构，前述树脂组合物含有硼硅酸盐玻璃。前述硼硅酸盐玻璃优选包含B2O3、SiO2和碱金属氧化物。