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US 12,595,391 B2Granted
Flame-retardant cable with self-extinguishing coating layer
AssigneePrysmian S.p.A.
InventorsPauline Audebet, Vito Scrima, Luigi Caimi, Flavio Casiraghi, Serge Colombier, Sergio Gutierrez
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Abstract
A flame-retardant cable is disclosed, the cable having a core comprising at least one conductor, and a coating layer made from a low smoke zero halogen flame-retardant polymer composition comprising an ethylene vinyl acetate copolymer and a polyethylene having a density lower than 0.925 g/cm3 as polymeric base added with: a) from 110 to 160 phr of at least one metal hydroxide; b) from 1 to 7 phr of a phyllosilicate clay; c) from 1 to 7 phr of melamine or a derivate thereof; and d) from 1 to 7 phr of zinc borate.
Claims15
A flame-retardant cable, comprising:
- a core comprising at least one conductor;
- and
- a coating layer consisting of a low smoke zero halogen flame-retardant polymer composition consisting of an ethylene vinyl acetate copolymer, a polyethylene polymer having a density up to 0.935 g/cm, and optionally an anhydride-modified or silane-modified polymer, as a halogen-free polymeric base, and:
- a) 110 to 160 phr of at least one metal hydroxide;
- b) 0.5 to 5 phr of a phyllosilicate clay;
- c) 1 to 7 phr of melamine or a derivative thereof;
- d) 1 to 7 phr of zinc borate;
- and
- e) optionally, 20 to 80 phr of an alkali or alkaline-earth metal carbonate;
- wherein:
- the ethylene vinyl acetate copolymer is present in an amount of 65 to 90 phr;
- and
- the polyethylene polymer is present in an amount of 10 to 45 phr and has a melt index of lower than 10 but at least 0.6 grams per 10 minutes.
10 more elements
Dependencies are inferred from the claim text.