Fire retardant optical fiber cable
AssigneeCorning Optical Communications LLC
InventorsHarold Edward Hudson, II, William Carl Hurley
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Abstract
An optical communication cable is provided. The optical communication cable includes a cable jacket and a plurality of optical fiber subunits surrounded by the cable jacket. Each optical fiber subunit includes a subunit jacket and a plurality of optical fibers located within the subunit passage. Each optical fiber includes an outer polymer buffer coating, such as a tight buffer coating. The outer cable jacket and/or the outer polymer buffer coating of the optical fibers is formed from a halogen containing polymer material including a fire retardant material, and the subunit jacket is formed from a polyolefin polymer material including a fire retardant material.
Claims20
A fire retardant and low smoke optical communication cable, comprising:
- a cable jacket;
- a plurality of optical fiber subunits surrounded by the cable jacket, each optical fiber subunit comprising:
- a subunit jacket defining a subunit passage;
- and
- a plurality of tight buffered optical fibers located within the subunit passage, each optical fiber comprising:
- a glass core;
- and
- a polymer tight buffer coating surrounding the glass core, the polymer tight buffer coating having an outer diameter greater than 400 μm;
- wherein the cable jacket is formed from a halogen containing polymer material including a fire retardant material;
- wherein the polymer tight buffer coating of each optical fiber is formed from a halogen containing polymer material including a fire retardant material;
- and
- wherein each subunit jacket is formed from a non-halogen containing polymer material including a fire retardant material;
- wherein the optical communication cable is plenum burn test rated as described in NFPA 262 utilizing the Steiner Tunnel burn test.
An optical communication cable, comprising:
- an outer cable jacket including an outer surface defining the outermost surface of the cable;
- a plurality of optical fiber subunits surrounded by the outer cable jacket, each optical fiber subunit comprising:
- a subunit jacket defining a subunit passage;
- and
- a plurality of optical fibers located within the subunit passage, each optical fiber including an outer polymer buffer coating having an outer diameter of at least 400 μm;
- wherein the outer cable jacket is formed from a halogen containing polymer material including a fire retardant material;
- wherein the subunit jacket is formed from a polyolefin polymer material including a fire retardant material;
- wherein the optical communication cable is plenum burn test rated as described in NFPA 262 utilizing the Steiner Tunnel burn test.
A plenum rated, fire retardant and low smoke optical communication cable comprising:
- an outer cable jacket including an outer surface defining the outermost surface of the cable;
- a central strength member surrounded by the outer cable jacket, the central strength member comprising:
- a tensile strength element;
- and
- a polymer overcoat layer surrounding the tensile strength member;
- and
- a plurality of optical fiber subunits located around the central strength member within the outer cable jacket, each optical fiber subunit comprising:
- a subunit jacket defining a subunit passage;
- and
- a plurality of optical fibers located within the subunit passage, each optical fiber comprising:
- a glass core;
- and
- a polymer buffer coating surrounding the glass core and having an outer diameter greater than 400 μm;
- wherein the number of optical fiber subunits is at least three and the number of optical fibers in each subunit is at least two;
- wherein the outer cable jacket is formed from a polyvinylchloride material including a fire retardant material;
- wherein the polymer buffer coating is formed from a polyethylene material including a fire retardant material;
- wherein the subunit jacket is formed from a polyethylene material including a fire retardant material;
- wherein the polymer overcoat layer is formed from a polyvinylchloride material including a fire retardant material;
- wherein the optical communication cable is plenum burn test rated as described in NFPA 262 utilizing the Steiner Tunnel burn test.
Dependencies are inferred from the claim text.