Wire insulation abrasion resistance

The first commercial applications of polypyromellitimides were as wire enamels, as insulating varnishes and for coating glass-cloth (Pyre.ML, Du Pont). In film form (Kapton) many of the outstanding properties of the polymer may be more fully utilised. These include excellent electrical properties, solvent resistance, flame resistance, outstanding abrasion resistance and exceptional heat resistance. After 1000 hours exposure to air at 300°C the polymer retained 90% of its tensile strength. 

Abrasion resistance and solder iron resistances are two other important properties required from a wire and cable insulator. These properties are critical for polymers used as sheathing or jacketing for hookup wire. Cross-linking improves both of thern. ... 

Applications. PVF resins are used almost exclusively to make electric and magnetic wire insulation. In these applications the PVF resin component helps provide toughness, as well as abrasion and thermal resistance. 

JP 05009254 (Japanese) 1993 Self-lubricating electrically insulating wires Fujkura Kk, Japan, S Amano etal. Insulating coating was improved for Cu wire with good lubricity and abrasion resistance Polyimide-siloxane was prepared using PMDA, MDA and aminosiloxanes... 

EP 323142 (European) 1989 Ternary polyether ketone blend wire insulations Pirelli General PLC, UK CK Alesbury, RJ Murphy Formulation shows excellent stress craze resistance, flexibility and flame resistance Blends of polyarylene ether ketones, polyether imides and polyfimide siloxanes) were coated onto wire for solvent resistance, O index and abrasion resistance. Blends without siloxane-imide copolymer did not meet these properties... 

Thermocouple wire is available commercially either as bare wire or as wire protected with a variety of insulators. The best choice of insulation for use up to 280°C is Teflon. Its resistance to abrasion, chemical reaction, solvents, and humidity is excellent, and its flexibility is good. Braided fiberglass is very good for use up to 480°C, but it has poor abrasion resistance and quite high porosity. Special braided ceramic fibers are available for use... 

Thermoplastic comprised of an alternating copolymer of ethylene and chlorotrifluoroethylene. It has good impact resistance and good abrasion resistance, chemical resistance, weatherability, and electrical properties. It can be molded, extruded, and powder-coated with uses in tubing, cable and wire insulation, valves, pump parts, wraps, and tower packing and chemical equipment applications. 

Tapered butadiene-styrene copolymers are important commercial materials because of their outstanding extrusion characteristics, low water absorption, good abrasion resistance, and good electrical properties. Tapered block copolymers are used for wire insulation and shoe soles (after vulcanization) as well as for asphalt moditication [3]. 

FIFE tape is used in many applications, including sealing joints, insulating conductive wires, and protecting materials from corrosive elements. FIFE demonstrates a good chemical and heat resistance, electrical insulation characteristics, as well as a low coefficient of friction. However, in general, it has less than desirable mechanical properties, in particular with respect to abrasion resistance and compression strength. 

Most ionomers have good dielectric characteristics over a broad frequency range. The combination of these electrical properties, high melt strength, and abrasion resistance qnalihes these materials for insulation and jacketing of wire and cable. Their excellent mechanical and optical properties make them especially useful for thermoformed packaging and abrasion- and impact-resistant parts. 

Wire and Cable Insulation. LLDPE use in wire and cable insulation makes up approximately 1% of LLDPE consumption. Cable insulation requires flexibility, toughness, abrasion resistance, low brittleness temperature, and good dielectric properties. LLDPE offers a better balance of flexibility and toughness than LDPE or HDPE. LLDPE-coated wire and cable is used in numerous low and medium voltage applications. Metallocene-catalyzed resins are finding use in wire and cable jacketing because of improved abrasion resistance, flexibility, and low temperature toughness (125,128). 

Wire and Cable Coating. Nylons are widely used for wire covering and sheathing cable. In the latter application, nylon is usually overcoated onto insulation of another material, such as PVC, in order to provide cut and abrasion resistance. In a specialized application, nylon-11 and nylon-12 are used to provide... 

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