US 11,910,495 B2
Conductive ink with enhanced mechanical fatigue resistance
Jin Hu, Hudson, OH (US); Casey Slane, Tallmadge, OH (US); and Nathaniel Ching, Hartville, OH (US)
Assigned to GOODRICH CORPORATION, Charlotte, NC (US)
Filed by GOODRICH CORPORATION, Charlotte, NC (US)
Filed on Dec. 13, 2019, as Appl. No. 16/713,475.
Prior Publication US 2021/0185767 A1, Jun. 17, 2021
Int. Cl. H05B 3/14 (2006.01); B64D 15/12 (2006.01); C09D 11/037 (2014.01); C09D 11/102 (2014.01); C09D 11/52 (2014.01); H05B 1/02 (2006.01); H05B 3/03 (2006.01); H05B 3/32 (2006.01)
CPC H05B 3/145 (2013.01) [B64D 15/12 (2013.01); C09D 11/037 (2013.01); C09D 11/102 (2013.01); C09D 11/52 (2013.01); H05B 1/0236 (2013.01); H05B 3/03 (2013.01); H05B 3/32 (2013.01); B64D 2221/00 (2013.01); H05B 2203/013 (2013.01); H05B 2203/017 (2013.01); H05B 2203/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A water system for an aircraft, the water system comprising:
a first tube including a first inlet, a second inlet, and an outlet, the second inlet disposed between the first inlet and the outlet, the tube defining a longitudinal axis, wherein water is configured to flow in a direction defined by the longitudinal axis from the first inlet through the outlet;
a second tube coupled to the outlet of the tube;
an electrical interface disposed at the second inlet; and
a heating trace assembly disposed in the first tube and extending from a first longitudinal end to a second longitudinal end, the first longitudinal end coupled to the electrical interface, the second longitudinal end configured to float freely in the second tube during operation of the water system the heating trace assembly configured to control a temperature of water disposed in the water system during operation of the water system, at least a portion of the heating trace assembly extending in the direction defined by the longitudinal axis of the first tube, the heating trace assembly comprising:
an insulator;
a ceramic positive temperature coefficient (PTC) element coupled to the insulator, the ceramic PTC element extending along a length of the insulator;
a first bus bar extending along the length of the insulator; and
a second bus bar extending along the length of the insulator, the ceramic PTC element coupled to the first bus bar and the second bus bar, wherein:
the first bus bar is a first conductive ink, and wherein the second bus bar is a second conductive ink,
the first conductive ink and the second conductive ink each include:
a high melting temperature thermoplastic polyurethane (TPU),
a plurality of conductive particles disposed in the high melting temperature TPU, and
an additive configured to act as a reinforcing agent and an adhesive promoter, the additive including titanium dioxide particles.