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US 12,567,517 B2Granted
Low-smoke, flame-retardant data communication cables
AssigneePrysmian S.p.A.
InventorsEric W. Bates, Stephen A. Thwaites, James D. Malkemus
Life of this patent
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Abstract
A data communication cable includes a jacket layer surrounding a cable core, which includes at least one pair of twisted electric conductors electrically insulated with a flame-retardant polypropylene (FRPP)-based material. The FRPP-based material includes a char enhancer, a halogenated flame retardant; and a flame retardant additive. The FRPP-based material is free from flame-retardant hydrated mineral filler.
Claims16
A data communication cable for use in a plenum comprising:
- a cable core comprising a plurality of pairs of twisted electric conductors, wherein at least one pair of twisted electric conductors of the plurality of pairs of twisted electric conductors is electrically insulated with a flame-retardant polypropylene (FRPP)-based material comprising:
- a polymer base comprising 5-25 phr of a polypropylene homopolymer, 1-20 phr of a polar-modified polypropylene homopolymer or copolymer, and the remaining portion of the polymer base being formed from a polypropylene copolymer;
- from 25 to 60 phr of a char enhancer;
- a halogenated flame retardant;
- and
- a flame-retardant additive;
- wherein the FRPP-based material is free from flame-retardant hydrated mineral filler;
- and
- a jacket layer surrounding the cable core.
6 more elements
A data communication cable for use in a plenum comprising:
- a cable core comprising a pair of twisted electric conductors that is electrically insulated with a flame-retardant polypropylene (FRPP)-based material comprising:
- a polymer base comprising 5-25 phr of a polypropylene homopolymer, 1-20 phr of a polar-modified polypropylene homopolymer or copolymer, and the remaining portion of the polymer base being formed from a polypropylene copolymer;
- from 25 to 60 phr of a char enhancer;
- a halogenated flame retardant;
- and
- a flame-retardant additive;
- wherein the FRPP-based material is free from flame-retardant hydrated mineral filler;
- and
- a jacket layer surrounding the cable core.
6 more elements
Dependencies are inferred from the claim text.