Drainage material for coating a substrate with resin is multi-layered with permeable middle layer and outer reinforcing layer

摘要

The drainage material (4) for vacuum coating a substrate (2) with a resin by infusion to make a multi-layered material (1) with an impermeable core (3) consists of an inner absorbent layer (5) adjacent to the core, a permeable middle layer (6) and an outer reinforcing layer (7). An independent claim is also included for a method of laying the drainage material. The core can be enclosed in the multi-layered draining material before it is covered by the substrate and placed inside a supple and impermeable pouch for applying the vacuum, or when the core is being cut to the required size.