PROBLEM TO BE SOLVED: To provide a tube assembly having excellent durability against chemicals, excellent pumping performance and improved connection strength, and also to provide a method for producing a tube assembly.SOLUTION: The tube assembly 10 comprises a first tubular member 20 having, at least on its surface, a resin which does not substantially contain polar groups and a second tubular member 30 having, at least on its surface, a resin containing polar groups. The inside space S1 of the first tubular member 20 and the inside space S2 of the second tubular member 30 communicate with each other. An intervening member 40 having polar groups at least on the surface is arranged at the connection of the first and the second tubular members 20 and 30. The intervening member 40 and the second tubular member 30 are connected by an adhesive. The intervening member 40 and the first tubular member 20 respectively have engaging structures 41 and 26 that are engageable with each other and are engaged by means of the engaging members 41 and 26 to restrict a relative movement of the first tubular member 20 in the axial direction.COPYRIGHT: (C)2010,JPO&INPIT【課題】耐薬品性及びポンピング性能に優れ且つ接続強度を充分に向上できる管組立体及び管組立体の製造方法を提供すること。【解決手段】管組立体10は、極性基を実質的に有しない樹脂を少なくとも表面に有する第1管状部材20と、極性基を有する樹脂を少なくとも表面に有する第2管状部材30と、を備え、第1管状部材20の内部空間S1と第2管状部材30の内部空間S2とが連通されている。第1管状部材20と第2管状部材30との接続部には、極性基を有する樹脂を少なくとも表面に有する介在部材40が介在し、この介在部材40及び第2管状部材30は、接着剤を介して接合され、介在部材40及び第1管状部材20は、互いに係合可能な係合構造41,26を有し、この係合構造41,26により互いに係合し、第1管状部材20の軸方向への相対移動を制限されている。【選択図】図2
