Cross-linking is the general term for the process of forming covalent chemical bonds to join two polymer chains together. The term “curing” refers to the crosslinking of the thermosetting copolymer.
STRATO® EVA film is a thermosetting material: the lamination process activates the cross-linking of the molecules and as a consequence, the EVA film will not melt anymore when heated to high temperatures a second time after the curing because it is an irreversible process.
The cross-linking is carried out in order to improve the elongation, the rigidity, the aging and the heat resistance properties of the STRATO® EVA film.
The resulting characteristics of the crosslinked STRATO® EVA film are superior to the ones of a thermoplastic material such as PVB.