Laminate for lining matrix feeders used to impregnate preforms comprises gas-permeable inner sheet and gas-impermeable outer sheet separated by layer of gas-permeable spacers, textile layer being laminated to outer surface of inner sheet

摘要

The multilayer laminate for lining matrix feeders used in impregnation of preforms comprises a gas-permeable, matrix-impermeable inner sheet (41) and a gas-impermeable outer sheet (44). These are separated by a layer (43) of gas-permeable spacers (45). These hold the sheets in position when a vacuum is applied between them. A textile layer (42) is laminated to the outer surface of the inner sheet.