Abstract: A medium voltage electric cable having a conductor, an inner semi-conductive layer, an insulating layer, an outer semi-conductive layer, a wire metal screen, a filler layer made from an extruded elastomeric low smoke zero halogen (LSOH) composition containing a polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm3 and a metal hydroxide, and an outer sheath made from a low smoke zero halogen (LSOH) composition containing a polymer mixture of an EVA polymer and polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm3, the polymer mixture being charged with a metal hydroxide and a phyllosilicate clay.

Abstract: Disclosed is an armored fire resistant fiber optic cable including a core comprising a central strength member, and a plurality of buffer tubes arranged around said central strength member, each buffer tube containing a plurality of optical fibers; a first mica layer arranged around the core; an inner sheath surrounding the first mica layer; a metal wire armor surrounding the inner sheath; and an outer sheath surrounding and in direct contact with the metal wire armor, wherein a second mica layer surrounds the inner sheath and the metal wire armor surrounds the second mica layer.

Abstract: The present invention concerns an electric cable (10; 20) comprising: —an electric conductor (11, 21) surrounded with an electrically insulating layer (12, 22) made from a first polymer composition comprising: (a) polyvinyl chloride as a first polymer matrix, (b) an amount up to 45 phr of a plasticizing system consisting of a phthalate plasticizer and a second plasticizer selected from: dialkyl-adipate, dialkyl-sebacate or dialkyl-azelate, wherein the alkyl group contains from 4 to 10 carbon atoms; the first polymer composition having a limiting oxygen index (LOI) up to 30%; and—an outer sheath (13, 24), surrounding the insulating layer (12, 22), made from a second polymer composition comprising: (i) a halogen-free second polymer matrix; and (ii) a halogen-free inorganic flame-retardant filler in amount suitable to impart flame retardant properties to the outer sheath (13, 24).

Abstract: Disclosed is a fire resistant, all dielectric fiber optic cable with high fiber count. The cable comprises a core including a central strength member and buffer tubes containing fibers, arranged around the central strength member. A first mica layer is arranged around the core. A glass yarn layer surrounds the first mica layer and is in direct contact therewith. A inner sheath surrounds the glass yarn layer. A second mica layer surrounds the inner sheath. An outer sheath surrounds the second mica layer. The buffer tubes contain a water-blocking filling material comprising a silicone gel, wherein said silicone gel has a drop point of at least 200° C.

Abstract: A medium voltage electric cable is disclosed the cable comprising: a conductor; an inner semi-conductive layer arranged in a radially outer position with respect to the conductor; an insulating layer arranged in a radially outer position with respect to the inner semi-conductive layer and directly contacting the inner semi-conductive layer; an outer semi-conductive layer arranged in a radially outer position with respect to the insulating layer and directly contacting the insulating layer; a wire metal screen arranged in a radially outer position with respect to the outer semi-conductive layer; a filler layer arranged in a radially outer position with respect to the wire metal screen and interpenetrating within the wire metal screen, the filler layer being made from an extruded elastomeric low smoke zero halogen (LSOH) composition comprising a polyethylene homopolymer and/or copolymer having a density lower than 0.

Abstract: Disclosed is a fire resistant, all dielectric fiber optic cable with high fiber count. The cable comprises a core including a central strength member and buffer tubes containing fibers, arranged around the central strength member. A first mica layer is arranged around the core. A glass yarn layer surrounds the first mica layer and is in direct contact therewith. A inner sheath surrounds the glass yarn layer. A second mica layer surrounds the inner sheath. An outer sheath surrounds the second mica layer. The buffer tubes contain a water-blocking filling material comprising a silicone gel, wherein said silicone gel has a drop point of at least 200° C.

Abstract: The present disclosure relates to a signalling cable that includes: a cable core, a metallic screen surrounding and in direct contact with the cable core, and at least one flame retardant low smoke zero halogen polymeric sheath surrounding and in radially position with respect to the metallic screen. The cable core includes a plurality of insulated electric conductors and a core wrap. The insulated electric conductors each includes an electric conductor insulated by a fire barrier and a flame retardant low smoke zero halogen polymeric insulating layer.

Abstract: A flame-retardant optical cable is disclosed which includes a polymeric central loose tube housing optical fibres, a metallic armour surrounding the polymeric central loose tube, and a multi-layered sheath surrounding and in direct contact with the metallic armour. The multi-layered sheath includes an inner layer, an intermediate layer, and an outer layer, all made of a LSoH flame-retardant material. The LSoH flame-retardant material of the intermediate layer has a limiting oxygen index (LOI) higher than the LOI of the LSoH flame-retardant material of the inner layer and of the outer layer. Such cable has improved flame-retardant properties, particularly in terms of slowing flame propagation, heat release, droplets and emission of smokes, when it is exposed to flames during fire.

Abstract: A flame retardant cable for low-voltage applications is disclosed which comprises at least one conductor individually electrically insulated by a layer of polymeric material, a fire-resistant tape containing an inorganic material wrapped around said at least one individually electrically insulated conductor and an multilayered outer sheath having flame-retardant properties which encloses said at least one individually electrically insulated conductor and said fire-resistant tape, wherein said multilayered outer sheath comprises an inner layer and an outer layer, the inner layer being made of a flame-retardant polymeric material having a limiting oxygen index (LOI) higher than the LOI of the flame-retardant polymeric material forming the outer layer of said sheath.

Abstract: A fire-resistant optical fibre cable includes a core having a central strength member and buffer tubes arranged around the central strength member. Each buffer tube contains optical fibres. A mica layer is arranged around the core. A glass yarn layer surrounds and is in direct contact with the mica layer. Metal armour surrounds the glass yarn layer. A multi-layered sheath surrounds and is in direct contact with the armour. The sheath includes a first layer, a second layer surrounding and in contact with the first layer, and a third layer in a radial inner position with respect to the first layer and in direct contact thereto. The first, second and third layers are made of LS0H flame-retardant material. The LS0H material of the first layer has an LOI higher than the LOI of the LS0H material of the second and third layers. The second layer is the cable outermost layer.

Abstract: In one embodiment, a fiber optic cable comprises a core comprising a central strength member and a plurality of buffer tubes arranged around the central strength member, where each buffer tube includes a plurality of optical fibers. The fiber optic cable includes a mica layer arranged around the core, a glass yarn layer surrounding and in direct contact with the mica layer, an inner sheath surrounding and in direct contact with the glass yarn layer, a metal armor surrounding the inner sheath; and an outer sheath surrounding and in direct contact with the metal armor. The central strength member comprises a hydroxide-containing flame retardant polymeric material, and the plurality of buffer tubes contain a water-blocking filling material comprising a silicone gel, where the silicone gel has a drop point of at least 200° C., and where the fiber optical cable is configured to be fire resistant.

Abstract: Disclosed is an armored fire resistant fiber optic cable including a core comprising a central strength member, and a plurality of buffer tubes arranged around said central strength member, each buffer tube containing a plurality of optical fibers; a first mica layer arranged around the core; an inner sheath surrounding the first mica layer; a metal wire armor surrounding the inner sheath; and an outer sheath surrounding and in direct contact with the metal wire armor, wherein a second mica layer surrounds the inner sheath and the metal wire armor surrounds the second mica layer.

Abstract: A flame-retardant optical cable is disclosed which includes a polymeric central loose tube housing optical fibres, a metallic armour surrounding the polymeric central loose tube, and a multi-layered sheath surrounding and in direct contact with the metallic armour. The multi-layered sheath includes an inner layer, an intermediate layer, and an outer layer, all made of a LSoH flame-retardant material. The LSoH flame-retardant material of the intermediate layer has a limiting oxygen index (LOI) higher than the LOI of the LSoH flame-retardant material of the inner layer and of the outer layer. Such cable has improved flame-retardant properties, particularly in terms of slowing flame propagation, heat release, droplets and emission of smokes, when it is exposed to flames during fire.

Abstract: A fire-resistant optical fibre cable includes a core having a central strength member and buffer tubes arranged around the central strength member. Each buffer tube contains optical fibres. A mica layer is arranged around the core. A glass yarn layer surrounds and is in direct contact with the mica layer. Metal armour surrounds the glass yarn layer. A multi-layered sheath surrounds and is in direct contact with the armour. The sheath includes a first layer, a second layer surrounding and in contact with the first layer, and a third layer in a radial inner position with respect to the first layer and in direct contact thereto. The first, second and third layers are made of LS0H flame-retardant material. The LS0H material of the first layer has an LOI higher than the LOI of the LS0H material of the second and third layers. The second layer is the cable outermost layer.

Abstract: In one embodiment, a fiber optic cable comprises a core comprising a central strength member and a plurality of buffer tubes arranged around the central strength member, where each buffer tube includes a plurality of optical fibers. The fiber optic cable includes a mica layer arranged around the core, a glass yarn layer surrounding and in direct contact with the mica layer, an inner sheath surrounding and in direct contact with the glass yarn layer, a metal armor surrounding the inner sheath; and an outer sheath surrounding and in direct contact with the metal armor. The central strength member comprises a hydroxide-containing flame retardant polymeric material, and the plurality of buffer tubes contain a water-blocking filling material comprising a silicone gel, where the silicone gel has a drop point of at least 200° C., and where the fiber optical cable is configured to be fire resistant.

Abstract: The present disclosure relates to a signalling cable that includes: a cable core, a metallic screen surrounding and in direct contact with the cable core, and at least one flame retardant low smoke zero halogen polymeric sheath surrounding and in radially position with respect to the metallic screen. The cable core includes a plurality of insulated electric conductors and a core wrap. The insulated electric conductors each includes an electric conductor insulated by a fire barrier and a flame retardant low smoke zero halogen polymeric insulating layer.

Abstract: A flame retardant cable for low-voltage applications is disclosed which comprises at least one conductor individually electrically insulated by a layer of polymeric material, a fire-resistant tape containing an inorganic material wrapped around said at least one individually electrically insulated conductor and an multilayered outer sheath having flame-retardant properties which encloses said at least one individually electrically insulated conductor and said fire-resistant tape, wherein said multilayered outer sheath comprises an inner layer and an outer layer, the inner layer being made of a flame-retardant polymeric material having a limiting oxygen index (LOI) higher than the LOI of the flame-retardant polymeric material forming the outer layer of said sheath.

Abstract: The present invention concerns an electric cable (10; 20) comprising: —an electric conductor (11, 21) surrounded with an electrically insulating layer (12, 22) made from a first polymer composition comprising: (a) polyvinyl chloride as a first polymer matrix, (b) an amount up to 45 phr of a plasticizing system consisting of a phthalate plasticizer and a second plasticizer selected from: dialkyl-adipate, dialkyl-sebacate or dialkyl-azelate, wherein the alkyl group contains from 4 to 10 carbon atoms; the first polymer composition having a limiting oxygen index (LOI) up to 30%; and—an outer sheath (13, 24), surrounding the insulating layer (12, 22), made from a second polymer composition comprising: (i) a halogen-free second polymer matrix; and (ii) a halogen-free inorganic flame-retardant filler in amount suitable to impart flame retardant properties to the outer sheath (13, 24).

Abstract: A self-supporting overhead telecommunication/power cable includes a supporting portion and a transmission portion mutually arranged according to a figure-8 configuration. The transmission portion includes at a central position thereof, an optical fibre conductor and, at a radially outer position with respect to the optical fiber conductor, electrical conductors stranded around the optical fiber conductor. Preferably, the electrical conductors are grouped into sub-units which are stranded around the optical fiber conductor to provide a mechanical protection thereto.

Abstract: A self-supporting overhead telecommunication/power cable includes a supporting portion and a transmission portion mutually arranged according to a figure-8 configuration. The transmission portion includes at a central position thereof, an optical fibre conductor and, at a radially outer position with respect to the optical fibre conductor, electrical conductors stranded around the optical fibre conductor. Preferably, the electrical conductors are grouped into sub-units which are stranded around the optical fibre conductor to provide a mechanical protection thereto.