RESIN-CONTAINING MULTILAYER STRUCTURE

To provide a multilayer structure in which, while being composed of a reinforcing material-containing resin-based member, at least the surface has a metal-like physical property (particularly, a high elastic modulus, a low linear thermal expansion coefficient, and a good surface smoothness).SOLUTION: Provided is a multilayer structure including (A) a base material containing a reinforcing material and a first polymer, and (B) a surface modification layer containing a fine fiber structure and a second polymer impregnated in the fine fiber structure. In a preferred embodiment, the fine fiber structure is composed of cellulose fine fibers having an average fiber diameter of 0.005 μm or more and 2 μm or less.SELECTED DRAWING: Figure 1 【課題】強化材を含む樹脂系部材で構成されていながら、少なくとも表面が金属様の物性（特に、高い弾性率、低い線熱膨張係数、及び良好な表面平滑性）を有する多層構造体を提供する。【解決手段】（Ａ）強化材と、第１のポリマーとを含む基材、及び（Ｂ）微細繊維構造体と、前記微細繊維構造体中に含浸された第２のポリマーとを含む表面改質層、を含む、多層構造体が提供される。好ましい態様においては、微細繊維構造体が、平均繊維径０．００５μｍ以上２μｍ以下のセルロース微細繊維で構成されている。【選択図】図１