Abstract: The invention relates to a method for the production of a laminated core comprising a stack of metallic plates, in which: —a metallic sheet (2, 3) is chosen, having a first main face (4, 8) and a second main face (6, 9) which are coated with a sub-layer comprising at least one material selected from epoxides and polyepoxides, —a layer (12, 20) with a thickness of less than 500 ?m of a precursor composition selected from partly epoxides and at least partly cross-linked polyepoxides is placed in contact with said sub-layer, —a layer (16, 22) with a thickness of less than 500 ?m of a curing composition comprising at least one crosslinking agent is placed in contact with said sub-layer, —said metallic sheet is punched, —the metallic plates are then superposed to each other.

Abstract: The invention relates to a method for the production of a laminated core comprising a stack of metallic plates, in which: —a metallic sheet (2, 3) is chosen, having a first main face (4, 8) and a second main face (6, 9) which are coated with a sub-layer comprising at least one material selected from epoxides and polyepoxides, —a layer (12, 20) with a thickness of less than 500 ?m of a precursor composition selected from partly epoxides and at least partly cross-linked polyepoxides is placed in contact with said sub-layer, —a layer (16, 22) with a thickness of less than 500 ?m of a curing composition comprising at least one crosslinking agent is placed in contact with said sub-layer, —said metallic sheet is punched, —the metallic plates are then superposed to each other.

Abstract: The invention relates to a method for the preparation of a polyamide 6 copolymer, characterised in that a copolymerization reaction is carried out between: o at least one caprolactam of formula (I): o at least one caprolactam, named substituted caprolactam, in which at least one of the carbon atoms is covalently linked to at least one A moiety, said A moiety being selected from the group formed of: # moieties comprising at least one group of formula: (A) # moieties comprising at least one group of formula: (B) # moieties comprising at least one group of formula: (C) The invention also relates to a polyamide 6, to polyamide 6 filaments and filaments yarns.