3M™ TufQUIN TFT three-ply Inorganic Hybrid Insulating Paper Laminate 7 mil(3+1+3). 3M™ TufQUIN™ Insulating Paper Polyester Laminates are 3M™ TufQUIN Insulating Paper, combined with polyester film. Typical constructions consist of a thin ply of TufQUIN Insulating Paper bonded to both sides of polyester film using a high temperature resin system. It is designed for insulating and protecting electrical components.