Wire Coating Materials

Thermoplastic cyclic olefin polymers can be used for a wide range of applications, such as wire coating materials, agricultural films, and packaging films, and toner resins. Further, optical applications such as plate lenses, including Fresnel lenses have been described (6). 

Copolymers of ethylene and norbomene exhibit excellent transparency, high moisture barrier, high strength and stiffness, and low shrinkage. In comparison to poly(ethylene) (PE) and polypropylene) (PP), they show a very low gas permeability. They are used for blister packaging in pharmacy applications and for flexible films for food packaging. Multilayer films consisting of PP outer layers and a cyclic olefin copolymer are in use. 

Foaming agents can be added for the fabrication of wires, which require low dielectric constant and low dielectric loss tangent, such as communication cables, coaxial cables for computers, and high-frequency cables. 

Examples of foaming agents are sodium bicarbonate, ammonium bicarbonate and nitroso compounds. Especially, when dinitroso-pentamethylenetetramine is used, foaming aids can be added that accelerate the decomposition and reduce the decomposition temperature. This is achieved, for example, with salicylic acid, or with urea. Various chlorine and bromine flame retardants can be used as halogen-based flame retardants, e.g., tetrabromobisphenol A de-rivates. 

The wire coating material can be coated on a conductor by coextruding the conductor and the molten material in an extrusion molding machine. The compound is provided in the form of pellets. 

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The product used for these calculations was a fire retarded plasticized PVC wire coating material, which does not spread flame or continue burning unless an external source of heat or flame is directed at it. This material was chosen because PVC represents the most common cable... 

Poly(amide imide)s (PAI)s have been used in the late 1960s as wire coating materials.Soon afterwards this class of polymers were considered for aerospace applications." Varieties with urethane units and ester units have been discussed. Now various grades, suitable for extrusion and injection molding are available. Thermosetting types are also on the market. PAIs are in between poly(amide)s (PA)s and poly(imide) (PI) in their properties. 

A phosphoric ester metal salt nucleating agent which is easily dispersible in a crystalline polymer and effective in improving transparency and mechanical strength of the crystalline polymer is used in wire coating material. ... 

Wire coating Wire, corded Wire covering Wire, electrical Wire enamel Wire insulation Wire materials Wire-rope machines Wires... 

Bonding Agents. These materials are generally only used in wire cable coat compounds. They are basically organic complexes of cobalt and cobalt—boron. In wire coat compounds they are used at very low levels of active cobalt to aid in the copper sulfide complex formation that is the primary adherance stmcture. The copper sulfide stmcture builds up at the brass mbber interface through copper in the brass and sulfur from the compound. The dendrites of copper sulfide formed entrap the polymer chains before the compound is vulcanized thus hoi ding the mbber firmly to the wire. 

The polymer has found some small-scale outlets in other directions such as sheet, pipe and wire coating. Consumption of the polymer in these directions is, however, dependent on finding applications for which polypropylene is the most suitable material. 

Phenolic resins are useful surface coating materials. Resols are useful for stoving lacquers for coating chemical plant, textile equipment, razor blades, brassware cuid food cans. Phenolic resins are used with poly(vinyl formal) as a flexible, tough and solvent-resistant wire enamel. Oil-soluble resins based on synthetic phenols form the basis of some gloss paints. 

In reinforcing materials double-dipped polyesters for improved tire durability, plasma-treated yams for improved bonding in tire, and increased usage of aramid fabric as belt and application of PEN are the areas where manufacturers are showing interest. Introduction of new styles of steel wire geometry for improved mbber to metal adhesion and new steel wire coating formulations for improved mbber to metal bonding are other focused areas of development. 

Three room dimensions and two ceiling materials were analysed the products were PVC conduit (rigid and ENMT, semi-rigid 100 m of either) and PVC wire coating (400 m). 

Wire bonding, 9 694-695 Wire coating extrusion, 19 548-549 Wire, extrusion of, 19 790 Wire insulation HDPE, 20 174-175 LLDPE, 20 208-209 Wire interconnect materials... 

Uses. Production of methylene diphenyl diisocyanate (MDI), which is used to produce polyurethanes hardening agent for epoxy resins, anticorrosive materials, printed circuit parts, dyestuff intermediates, filament-wound pipe, and wire coatings... 

Uses. Production of polyurethane foams and plastics used in polyurethane paints and wire coatings the most commonly used material is a mixture of 80% 2,4 isomer and 20% 2,6 isomers... 

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