I am thinking about leaving an industry based job to do postdoc, because my present job is not much research oriented. After postdoc, I wish to return to industry for R & D positions.

Does, leaving a job for postdoc sonehow affect my employability in industry? I have a PhD in chemistry

Why can’t you get another research related job in industry? It would look good on your CV to have continuous industry positions rather than job hopping between industry and academia if industry is where you want to be