PURPOSE: To improve binding performance by uniformly applying an applied pressure by forming a coating layer arranged on pressurized surfaces of a pair of molds for heating and pressurizing a part to be bound of a laminate to thermally fusion-bond of an uneven ceramic layer and a fluorine resin layer.

CONSTITUTION: Parts 90 to be bound at an end of a laminate 9 having a plurality of sheets are introduced between a pair of molds 11 and 21 in which a coating layer 3 having excellent peelability from a surface of the laminate 9 is arranged on an entire pressurized surface. Both the molds 11 and 21 are oppositely approached to one another thereby to thermally fusion-bond the parts 90 to be bound. In this case, the layer 3 is formed of a ceramic layer 31 in which its surface is connected to the pressurized surfaces to become finely uneven and a fluorine resin layer 32 covered to be connected to the surface of the layer 31. Thus, extension of an edge of the layer 31 from outside of the molds 11, 21 is prevented, a thickness of the layer 31 is held uniform, the applied pressure is uniformly operated to improve its binding.