US 12,378,409 B1
High contrast laser markable cables and marking methods
Pill Alexander, Carrollton, GA (US); and Juan Alberto Galindo Gonzalez, Powder Springs, GA (US)
Assigned to Southwire Company, LLC, Carrollton, GA (US)
Filed by Southwire Company, LLC, Carrollton, GA (US)
Filed on Apr. 9, 2021, as Appl. No. 17/226,483.
Claims priority of provisional application 63/007,494, filed on Apr. 9, 2020.
Int. Cl. C08L 77/00 (2006.01); B41M 5/26 (2006.01); B41M 5/44 (2006.01); C08L 23/26 (2006.01); H01B 3/30 (2006.01); H01B 3/44 (2006.01); H01B 7/36 (2006.01); H01S 3/067 (2006.01); H01S 3/16 (2006.01)
CPC C08L 77/00 (2013.01) [B41M 5/265 (2013.01); B41M 5/267 (2013.01); B41M 5/44 (2013.01); C08L 23/26 (2013.01); H01B 3/305 (2013.01); H01B 3/441 (2013.01); H01B 7/365 (2013.01); C08L 2205/06 (2013.01); C08L 2207/322 (2013.01); H01S 3/06716 (2013.01); H01S 3/1618 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A laser marking method comprising:
focusing a laser source onto a markable portion of a cable sheathing, the cable sheathing comprising a lubricating additive;
emitting an electromagnetic radiation from the laser source and onto the markable portion; and
forming an indelible mark on the markable portion of the cable sheathing;
wherein:
an amount of the electromagnetic radiation emitted onto the markable portion is less than about from about 0.01 kJ/m2 to about 2 kJ/m2; and
the cable sheathing contains less than 0.5 wt. % of a laser marking additive; and
a contrast ratio between a color of the indelible mark and a background color of the cable sheathing is at least about 2.