US 11,919,656 B2
Conductive broad good providing lightning strike protection
Larry Allen Christy, Cincinnati, OH (US); Joseph E. Sprengard, Jr., Cincinnati, OH (US); Jae Hak Kim, Mason, OH (US); and Chaminda Jayasinghe, Cincinnati, OH (US)
Assigned to General Nano LLC, Cincinnati, OH (US)
Appl. No. 16/632,736
Filed by GENERAL NANO LLC, Cincinnati, OH (US)
PCT Filed Jul. 20, 2018, PCT No. PCT/US2018/043069
§ 371(c)(1), (2) Date Jan. 21, 2020,
PCT Pub. No. WO2019/018754, PCT Pub. Date Jan. 24, 2019.
Claims priority of provisional application 62/535,365, filed on Jul. 21, 2017.
Prior Publication US 2020/0165005 A1, May 28, 2020
Int. Cl. B64D 45/02 (2006.01); C25D 3/12 (2006.01); D06M 10/06 (2006.01); D06M 11/83 (2006.01); D06M 101/40 (2006.01)
CPC B64D 45/02 (2013.01) [C25D 3/12 (2013.01); D06M 10/06 (2013.01); D06M 11/83 (2013.01); D06M 2101/40 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A conductive broad good, useful in the construction of an aircraft and in protecting the aircraft from a lightning strike, comprising:
a plurality of carbon fibers randomly-oriented throughout the conductive broad good;
a binder material binding the plurality of carbon fibers together, the plurality of bound fibers forming a dimensionally-stable nonwoven veil;
a first metal coating covering a surface of the plurality of bound fibers and the binder material of the dimensionally-stable nonwoven veil, the first metal coating comprising copper and having a basis weight of about 10-50 g/m2; and
a second metal coating covering the surface of the first metal coating, the second metal coating comprising nickel and having a basis weight of about 5-20 g/m2,
wherein the first and second metal coatings form a highly-conductive metal screen that follows the shape of the dimensionally-stable nonwoven veil, and the conductive broad good has a basis weight of less than 60 g/m2 and a sheet resistance of less than 0.015 ohms per square (Ω/□).