Patent ID: 8343404

Claim:
A method for producing a perforated material comprising the steps of: perforation of a first fabric sheet by means of a matrix comprising a specific perforation pattern adapted to penetrate the first fabric sheet; and impregnation of the perforated first fabric sheet with a resin, said step of impregnation being performed in the presence of the specific perforation pattern penetrating the first fabric sheet wherein the matrix comprises a base portion and a structured portion comprising the specific perforation pattern adapted to penetrate the first fabric sheet, the first fabric sheet having an upper base and a lower base; and in that said method further comprises the steps of: removal of at least the base portion of the matrix; placement of a second fabric sheet on at least one of the upper base or the lower base of the first fabric sheet; and impregnation of the perforated first fabric sheet and of the second fabric sheet, said step of impregnation being performed in the presence of at least one not removed portion of the structured portion of the matrix penetrating the first fabric sheet.