The product, L-316/11, has been developed for the manufacture of composite parts when using low pressure vacuum bag processing and, particularly, when producing one-shot honeycomb structures where telegraphing of the honeycomb structure can be a major problem.
JD Lincoln reports that the L-316/11 surfacing film is formulated to co-cure with most epoxy systems, requires a 250°F (120°C) cure cycle, but can tolerate cycling to 350°F (180°C). It is therefore fully compatible with the latest generation of out-of-autoclave aerospace prepregs.
L-316/11 surfacing film can be applied as a surface layer to glass fibre, aramid, or carbon based laminates, where it provides a tough, readily sandable, paint-ready finish. It is flame retardant and, as part of an appropriate composite construction, is capable of meeting the requirements of FAR 25.853 (vertical burn).
As standard product, L-316/11 is supplied on a polyester veil with a total areal weight of 0.035 psf (171g/m2), but can also be supplied in an unsupported format. It is also available to order on a number of other substrates, including lightning strike mesh.
JD Lincoln Inc, a manufacturer of high performance adhesives and composite materials for aerospace and other industrial markets, is based in California, USA.