US 12,136,503 B2
Low resistance polyethylene sheath with combined adhesive and mechanical properties
Simon Jorgensen, Sellebakk (NO); Audun Johanson, Oslo (NO); and Massimiliano Mauri, Borgenhaugen (NO)
Assigned to NEXANS, Courbevoie (FR)
Filed by NEXANS, Courbevoie (FR)
Filed on Mar. 22, 2022, as Appl. No. 17/701,357.
Claims priority of application No. 21 305 394 (EP), filed on Mar. 29, 2021.
Prior Publication US 2022/0336121 A1, Oct. 20, 2022
Int. Cl. H01B 7/28 (2006.01); B29C 48/00 (2019.01); B29C 48/05 (2019.01); B29C 48/154 (2019.01); C08L 23/06 (2006.01); H01B 7/282 (2006.01)
CPC H01B 7/2825 (2013.01) [B29C 48/022 (2019.02); B29C 48/05 (2019.02); B29C 48/154 (2019.02); C08L 23/06 (2013.01); B29K 2023/06 (2013.01); C08L 2203/202 (2013.01); C08L 2207/064 (2013.01); C08L 2207/066 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A water barrier for surrounding a cable core, said water barrier comprising:
an inner layer of lead-free metal foil having a thickness of t1, said inner layer of lead-free metal foil being laid circumferentially around the cable core, and
a continuous outer single layer of a polyethylene-based semi-conducting polymer having a thickness of t2,
wherein the ratio t2: t1 is at least 7, and
wherein the outer single layer of the polyethylene-based semi-conducting polymer is laid directly onto the inner layer of lead-free metal foil without an intermediate layer of adhesive,
wherein the value of the adhesion of the semi-conductive polymeric layer onto the metal foil layer being more than 0.5 N/mm according to IEC62067″.