A polymer composition comprising: (i) at least 40 wt % LDPE; (ii) a polypropylene homopolymer; and (iii) a random heterophasic polypropylene copolymer.

The present disclosure provides a coated conductor. The coated conductor includes a conductor and an outermost coating on the conductor. The coating includes (A) an ethylene-based polymer having an I21/I2 ratio from 20 to 50; and (B) a propylene/ethylene copolymer having a Mw/Mn from 2.0 to 3.5. The coating has a surface roughness from 20 μ-inch to 100 μ-inch.

A member for electric conduction, comprising a metal member and a resin member that is joined to at least a part of a surface of the metal member, the metal member having a roughness index, which is obtained by dividing a true surface area (m.sup.2) measured by a krypton adsorption method by a geometric surface area (m.sup.2), of 4.0 or more.

A method can include extruding polyethylene about a lead (Pb) barrier layer disposed about a conductor to form an assembly; and armoring at least one of the assemblies with metallic armor to form a cable. A power cable can include a conductor; a lead (Pb) barrier layer disposed about the conductor; a cushion layer disposed about the lead (Pb) barrier layer where the cushion layer includes crosslinked polyethylene (XLPE); and metallic armor wrapped about the cushion layer.

Polymeric compositions comprising a polybutylene terephthalate; a low-density polyolefin selected from a low-density polyethylene, a polyolefin elastomer, or combinations thereof; and a maleated ethylene-based polymer. Optical cable components fabricated from the polymeric composition. Optionally, the polymeric composition can further comprise one or more additives, such as a filler. The optical fiber cable components can be selected from buffer tubes, core tubes, and slotted core tubes, among others.

An electric wire for use in an electric vehicle with a large current of 100 A or more and a high voltage of 30 V or more includes a conductor and an electrically insulating layer covering an outer surface of the conductor, wherein the conductor includes first twisted wires in each of which a plurality of element wires are twisted together, and the first twisted wires are twisted together to form one or more second twisted wires, wherein an element-wire diameter of each of the element wires is 0.18 mm to 0.35 mm, and wherein a secant modulus of the electrically insulating layer is 15 MPa to 41 MPa.

A multimodal polyethylene composition having a lower molecular weight (LMW) ethylene homo or copolymer component (A) and a higher molecular weight ethylene copolymer component (B); wherein the LMW component comprises two fractions (ai) and (aii); wherein the polymer composition has a density of 930 kg/m3 or more (ISO1183), such as 938 to 955 kg/m3, an MFR2 (ISO1133 at 190° C. and 2.16 kg load) in the range of 0.05 to 10 g/10 min, a flex modulus of up to 800 MPa (ISO 178:2010), such as 300 to 800 MPa (ISO 178:2010) and a taber abrasion resistance of 8.0 to 13.0 mg/1000 cycle (ASTM D 4060: 2014).

An organic insulator is produced by cured resin product containing a cyclic olefin copolymer as a main component and has a cumulative luminescence amount measured by chemiluminescence measurement method of 3.7×10.sup.5 cpm or less. The glass transition temperature of the cured product is from 134° C. to 140° C. The cumulative luminescence amount is from 2.8×10.sup.5 cpm to 3.2×10.sup.5 cpm. A wiring board includes an insulation layer and an electrical conductor layer disposed on a surface of the insulation layer, and the insulation layer is the organic insulator described above.

A flame-retardant cable includes at least one core comprising a conductor and at least one protecting layer surrounding the core. The protecting layer is made from a low smoke zero halogen (LSOH) flame-retardant polymer composition comprising at least 70 phr of a polyethylene homopolymer or copolymer having a density lower than 0.90 g/cm.sup.3 as a halogen-free polymeric base, and: a) 100 to 800 phr of at least one metal hydroxide; and b) at least 10 phr of a tannin.

Described herein is a cable that includes a conductor surrounded by at least one semiconductive layer, wherein the layer comprises a polymer composition comprising a polypropylene homopolymer or a polypropylene copolymer with one or more comonomers, a polyolefin functionalized with an anhydride of a mono- or polycarboxylic acid, wherein said anhydride of a mono- or polycarboxylic acid can be linear or cyclic, wherein the functionalized polyolefin is different from the polypropylene homopolymer or polypropylene copolymer or the second polymer, and wherein the amount of the functionalized polyolefin is up to 10 wt % based on the total amount of the polymer composition, a solid conductive filler and a LDPE homopolymer or a LDPE copolymer of ethylene with one or more comonomers having a melting temperature (Tm) less than the Tm of the polypropylene homopolymer or polypropylene copolymer. Also described herein is a process for producing the polymer composition.