PROBLEM TO BE SOLVED: To provide a means capable of bonding an IPN gel to an adherend with such a high strength as to be endurable even when being arranged in an environment where various kinds of stresses (tensile stress, compressive stress, shear stress and the like) are continuously applied as in the application such as artificial cartilage.SOLUTION: The composite material formed by directly bonding the interpenetrating network structure (IPN) gel to the rough surface of the adherend is composed of: the IPN gel containing a first network structure and a second network structure and the adherend having a rough surface formed on at least a part of the surface of the adherend, wherein the first network structure comprises a first part 1(1) constructed on the rough surface of the adherend and a second part 1(2) which is separated from the first part 1(1) and is mounted on the first part 1(1), and the second network structure is continuously constructed over both gaps in the first part 1(1) and the second part 1(2) of the first network structure.COPYRIGHT: (C)2009,JPO&INPIT【課題】人工軟骨といった、様々な応力(引張応力、圧縮応力、せん断応力等)が継続的に加わる環境に配された場合にも耐えられる程の高強度で、IPNゲルと被着材料と接着可能な手段の提供。【解決手段】第一網目構造及び第二網目構造を含む相互侵入網目構造ゲルと、表面の少なくとも一部に粗面が形成された被着材料と、から構成される複合材料であって、前記第一網目構造が、前記被着材料の前記粗面上に構築された第一部位1(1)と、前記第一部位1(1)とは別体である、前記第一部位1(1)上に搭載された第二部位1(2)とを有しており、前記第二網目構造が、前記第一網目構造の前記第一部位1(1)及び前記第二部位1(2)内の両間隙に亘り連続的に構築されている、相互侵入網目構造ゲルが被着材料の粗面に直接接着した複合材料。【選択図】図1
