# US 8,772,638 B2 · Process for manufacturing a cable resistant to external chemical agents > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,772,638 B2 - Document ID: US8772638B2 - Status: Granted - Kind: B2 - Application number: 12/542,259 - Filed: 2009-08-17 - Published: 2010-01-07 - Granted: 2014-07-08 - Earliest claimed: 2009-08-17 - Assignees: Prysmian Cavi E Sistemi Energia S.R.L. - Applicants: Alberto Lumachi; Paolo Veggetti; Luca Giorgio De Rai; Franck O'Neil; Alberto Bareggi; Marco Frigerio; Sergio Belli - Inventors: Alberto Lumachi; Paolo Veggetti; Luca Giorgio De Rai; Franck O'Neil; Alberto Bareggi; Marco Frigerio; Sergio Belli - Web page: https://patentgrep.com/patent/US8772638B2 ## CPC - H01B 7/2813: {Protection against damage caused by electrical, chemical or water tree deterioration} - H01B 3/30: plastics; resins; waxes - H01B 13/14: by extrusion {(extrusion in general B29C48/00)} - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract Process for manufacturing a cable comprising the following steps:(a) conveying at least one conductor to an extruder apparatus;(b) extruding an insulating coating layer radially external to said at least one conductor; (c) longitudinally folding a metal tape around said extruded insulating coating layer, said metal tape bearing at least one adhesive coating layer in a radially external position; (e) extruding at least one continuous coating layer comprising at least one polyamide or a copolymer thereof around and in contact with said folded metal tape; wherein the step (e) is carried out at a draw down ratio (DDR) not higher than 2.5, preferably of from 1.2 to 2.0. ## Claims ### Claim 1 A cable comprising: at least one conductor; at least one insulating coating layer around said at least one conductor; at least one metal tape longitudinally folded around said at least one insulating coating layer, said metal tape bearing on its externally facing surface at least one ethylene based adhesive coating layer, wherein the longitudinally folded metal tape has a thickness of 0.05 mm to 1.0 mm and overlapping edges; at least one continuous coating layer comprising at least one polyamide or a copolymer thereof in a radially external position with respect to said at least one adhesive coating layer, said continuous coating layer being in contact with said at least one adhesive coating layer; at least one further adhesive coating layer in a radially inner position with respect to said at least one metal tape, said at least one further adhesive coating layer being in contact with said at least one metal tape; and at least one coating layer made of expanded polymeric material in a radially inner position with respect to said at least one metal tape. ### Claim 2 (depends on 1) The cable according to claim 1, wherein the insulating coating layer comprises at least one crosslinked ethylene/propylene or ethylene/propylene/diene elastomeric copolymer. ### Claim 3 (depends on 1) The cable according to claim 1, wherein the metal tape is made of aluminum, aluminum alloys, alloy-clad aluminum, copper, bronze, steel, tin free steel, tin plate steel, aluminized steel, stainless steel, copper-clad stainless steel, terneplate steel, galvanized steel, chrome or chrome-treated steel, lead, magnesium, tin, or mixtures thereof. ### Claim 4 (depends on 1) The cable according to claim 1, wherein the adhesive coating layer comprises at least one copolymer derived from ethylene and at least one comonomer selected from ethylenically unsaturated carboxylic acids. ### Claim 5 (depends on 1) The cable according to claim 1, wherein the adhesive coating layer has a thickness of 0.01 mm to 0.1 mm. ### Claim 6 (depends on 1) The cable according to claim 1, wherein the continuous coating layer comprising at least one polyamide or a copolymer thereof is selected from the condensation products of at least one amino acid, aminocaproic acid, 7-aminoheptanoic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, or of at least one lactam, caprolactam, oenantholactam, lauryllactam, or of at least one salt or mixtures of diamines, hexamethylenediamine, dodecamethylene diamine, metaxylylenediamine, bis(p-aminocyclohexyl)methane, trimethylhexamethylene, with at least one diacid, isophthalic acid, terephthalic acid, azelaic acid, suberic acid, sebacic acid, dodecanedicarboxylic acid; or mixtures of all these monomers. ### Claim 7 (depends on 1) The cable according to claim 1, wherein the continuous coating layer has a thickness of from 0.5 mm to 3 mm. ### Claim 8 (depends on 1) The cable according to claim 1, wherein the coating layer made of an expanded polymeric material comprises at least one expandable polymer selected from: polyolefins, copolymers of different olefins, copolymers of an olefin with an ethylenically unsaturated ester, polyesters, polycarbonates, polysulphones, phenol resins, urea resins, or mixtures thereof. ### Claim 9 (depends on 1) The cable according to claim 1, further comprising: a semiconductive coating layer radially internal to said insulating coating layer; and a semiconductive coating layer radially external to said insulating coating layer. ### Claim 10 (depends on 9) The cable according to claim 9, wherein a screen consisting of spirally wound electrically conducting wires or tapes is arranged around the semiconductive coating layer radially external to said insulating coating layer. ### Claim 11 (depends on 1) The cable according to claim 1, comprising, in addition to the coating layers defined above, at least one coating layer with the function of external protective sheath. ### Claim 12 A cable comprising; at least one conductor; at least one insulating coating layer around said at least one conductor; at least one metal tape longitudinally folded around said at least one insulating coating layer, said metal tape bearing on its externally facing surface at least one ethylene based adhesive coating layer, wherein the longitudinally folded metal tape has a thickness of 0.05 mm to 1.0 mm and overlapping edges; at least one continuous coating layer comprising at least one polyamide or a copolymer thereof in a radially external position with respect to said at least one adhesive coating layer, said continuous coating layer being in contact with said at least one adhesive coating layer; a semiconductive coating layer radially internal to said insulating coating layer; and a semiconductive coating layer radially external to said insulating coating layer; wherein a screen consisting of spirally wound electrically conducting wires or tapes is arranged around the semiconductive coating layer radially external to said insulating coating layer. ### Claim 13 (depends on 12) The cable according to claim 12, wherein the insulating coating layer comprises at least one crosslinked ethylene/propylene or ethylene/propylene/diene elastomeric copolymer. ### Claim 14 (depends on 12) The cable according to claim 12, wherein the metal tape is made of aluminum, aluminum alloys, alloy-clad aluminum, copper, bronze, steel, tin free steel, tin plate steel, aluminized steel, stainless steel, copper-clad stainless steel, terneplate steel, galvanized steel, chrome or chrome-treated steel, lead, magnesium, tin, or mixtures thereof. ### Claim 15 (depends on 12) The cable according to claim 12, wherein the adhesive coating layer comprises at least one copolymer derived from ethylene and at least one comonomer selected from ethylenically unsaturated carboxylic acids. ### Claim 16 (depends on 12) The cable according to claim 12, wherein the adhesive coating layer has a thickness of 0.01 mm to 0.1 mm. ### Claim 17 (depends on 12) The cable according to claim 12, wherein the continuous coating layer comprising at least one polyamide or a copolymer thereof is selected from the condensation products of at least one amino acid, aminocaproic acid, 7-aminoheptanoic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, or of at least one lactam, caprolactam, oenantholactam, lauryllactam, or of at least one salt or mixtures of diamines, hexamethylenediamine, dodecamethylene diamine, metaxylylenediamine, bis(p-aminocyclohexyl)methane, trimethylhexamethylene, with at least one diacid, isophthalic acid, terephthalic acid, azelaic acid, suberic acid, sebacic acid, dodecanedicarboxylic acid; or mixtures of all these monomers. ### Claim 18 (depends on 12) The cable according to claim 12, wherein the continuous coating layer has a thickness of from 0.5 mm to 3 mm. ### Claim 19 (depends on 12) The cable according to claim 12, comprising at least one further adhesive coating layer in a radially inner position with respect to said at least one metal tape, said at least one further adhesive coating layer being in contact with said at least one metal tape. ### Claim 20 (depends on 12) The cable according to claim 12, further comprising, in a radially inner position with respect to said at least one metal tape, at least one coating layer made of expanded polymeric material. ### Claim 21 (depends on 20) The cable according to claim 20, wherein the coating layer made of an expanded polymeric material comprises at least one expandable polymer selected from: polyolefins, copolymers of different olefins, copolymers of an olefin with an ethylenically unsaturated ester, polyesters, polycarbonates, polysulphones, phenol resins, urea resins, or mixtures thereof. ### Claim 22 (depends on 12) The cable according to claim 12, comprising, in addition to the coating layers defined above, at least one coating layer with the function of external protective sheath.