PROBLEM TO BE SOLVED: To provide a medical tool for permanently exhibiting excellent surface lubricity during use by firmly immobilizing various polymeric base materials and a surface lubricating layer with a simple method.SOLUTION: The medical tool includes: a base material layer comprising a polymeric material at least on the surface compounds each of which is carried by at least a part of the base material layer and has a plurality of thiol groups in a molecule and surface lubricating layers each of which covers the compound having the plurality of thiol groups in the molecule and comprises hydrophilic polymers with a reactive functional group. The medical tool has the surface lubricity in wetting, where the compounds having the thiol groups are carried by the base material layer by radiating ionized gas plasma containing nitrogen and also the surface lubricating layers are joined with the base material layers by reacting the compounds having the thiol groups with the hydrophilic polymers with the reactive function group.COPYRIGHT: (C)2012,JPO&INPIT【課題】種々の高分子基材と表面潤滑層とを、より簡便な手法で強固に固定化することにより、使用時の優れた表面潤滑性を永続的に発揮する医療用具を提供する。【解決手段】少なくとも表面が高分子材料からなる基材層と、該基材層の少なくとも一部に担持された、分子内に複数のチオール基を有する化合物と、該分子内に複数のチオール基を有する化合物を覆う、反応性官能基を有する親水性高分子からなる表面潤滑層と、を備え、該チオール基を有する化合物が窒素を含有するイオン化ガスプラズマを照射することにより基材層に担持されており、かつ該チオール基を有する化合物と、該反応性官能基を有する親水性高分子とを反応させることで表面潤滑層が基材層に結合している、湿潤時に表面が潤滑性を有する医療用具。【選択図】なし
