Patent ID: 8197244

Claim:
Multilayer, flexible planar material for delimiting a matrix supply space during the production of fibre-reinforced plastic components from fibre composite semifinished products by means of an injection process for injecting matrix material, the planar material having a gas-permeable, but matrix-impermeable diaphragm, a gas-impermeable sheet and also a highly gas-permeable spacer layer which is arranged between the diaphragm and the sheet and holds the sheet at a distance from the diaphragm when a reduced pressure is generated between the diaphragm and sheet, wherein: the diaphragm consists of a microporous polyurethane diaphragm or microporous ePTFE diaphragm onto which a textile layer reinforcing the diaphragm is laminated, the spacer layer is arranged on the textile layer, and the microporous diaphragm, the textile layer and the spacer layer are jointly embodied as a multifunctional laminate and as a result are securely connected to one another prior to delimiting the matrix supply space such that the microporous diaphragm, the textile layer and the spacer layer as the multifunctional laminate simultaneously delimit the matrix supply space and such that the multifunctional laminate is removable after production of the fibre-reinforced plastic components.