WIRE ENAMELS

DuPontTM Energy Solutions

DuPont Insulation material

Film (Kapton®, Mylar®)

Paper (Nomex®)

Plastic (Crastin®, Rynite®)

Liquids• Voltatex® Wire enamels• Voltatex® Impregnating Resins• Voltatex® Core Sheet Varnishes

Film Paper

Plastic

Liquids

DuPont’s Vision is to be the world’s most dynamic science company, creating sustainable solutions essential to a better, safer, healthier life for people everywhere.

We bring sustainable solutions to the market place to

support the world’s growing need for energy, creating

value for the customers we serve and society.

The DuPontTM Voltatex® product lines consist of DuPont’s

electrical insulation materials based on enamels, varnishes

and resins. Together with DuPont’s other insulation materials,

e.g., films (Kapton®, Mylar®), papers (Nomex®) and plastics

(Crastin®, Rynite®), this constitutes the industry’s broadest

range of insulation materials. In addition to these outstand-

ing products, DuPont offers its customers a global network

of R&D and technical centers, product supply, technical

expertise and related services.

The DuPontTM Voltatex® products create value for our custom-

ers by focusing on three complementary strategies. First, in

line with our core values and mission of sustainability, we

are committed to reducing the environmental footprint of

our products. Increasingly, our products will be based on

non-depletable resources, enable the reduction of emissions

during application and actively advance product life-cycle

requirements. Second, we build on DuPont’s two centuries

of experience as a science company to seek break-through

product innovation, developing advanced materials to meet

our industry’s growing demands for high performance and

reduced processing cost. We are committed to a continued

high level of R&D investments in order to enable discovery

of unique material properties and imagine novel application

methods which together will lead to more sophisticated

electrical insulation systems. The third part of our strategy

focuses on accelerated development and testing of total

system solutions comprised of integrated insulation

materials for seamless product and process compatibility,

meet the highest performance requirements and offer

further designer flexibility. These involve complex interactive

processes which invariably require close cooperation with

our partners and customers.

Wire is not wire

Enamel-insulated copper and aluminium wires are mainly

used in windings of electric motors, transformers,

generators or electric measuring devices. Depending on the

area of application the wire sizes vary. On the one hand the

diameter of fine wires used for electronic components of

watches for instance can be thinner than the one of a

human hair. On the other hand, in heavy electric motors

such as wind generators, the diameter or width of round or

flat wires can measure up to several millimetres.

Wires insulated by wire enamels

The electric insulation of copper and aluminium wires is

provided by enamels which are applied in up to 30 layers to

avoid a short-circuit of the windings. Moreover, these wire

enamels have to fulfil additional requirements – they must

present a high chemical and thermal resistance, a proper

adhesion to copper as well as an outstanding mechanical

stability. When used in converter-driven electric motors, the

insulation layer has to resist possible partial discharges in

order to avoid a short-circuit and thus a motor failure.

Wire enamels

DuPontTM Voltatex® Wire enamels

Voltron’s integrated nanotechnologie is high-voltage resistant

DuPontTM Voltatex®: A wire enamel system for all applications

For more than 60 years DuPont have been an international

leader in developing modern insulation materials like wire

enamels, impregnating varnishes and core sheet varnishes.

Since the invention of the first oil-free synthetic wire enamel

in 1942, DuPont have set an unparalleled quality standard

with the brand name Voltatex®. And it is the close cooper-

ation with specialists in the international magnet wire

industry which allows DuPont to constantly contribute to

the development of new technologies and manufacturing

processes and adapt the product portfolio to the increasing

market requirements.

In this context, individual wire enamel solutions have been

created for particular motor applications in order to improve

and optimize the specific operational performance. Thus the

product range has steadily been expanded to the extent that

to date the wire enamel system of DuPontTM Voltatex®

comprises nine different high-grade segments.

DuPontTM Voltatex® Range of Wire Enamels

Heat-resistant Polyester wire enamels suitable for a wide range of applications.

Highly heat-resistant THEIC Polyester wire enamels especially suitable for round wires.

Highly heat-resistant THEIC Polyesterimide wire enamels with very good mechanical, electrical, chemical and thermal characteristics.

AI-Overcoat wire enamels for dual coating (Basecoat: THEIC Polyester or THEIC Polyesterimide) give excellent mechanical properties and chemical resistance.

Heat resistant Polyesterimide wire enamels for the production of magnet wires tinnable at 470° C.

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Polyurethane wire enamels allow the production of directly solderable insulated wires, with short soldering times at 320° C.

Self-bonding wire enamels based on polyvinyl-butyral or polyamide for the production of magnet wire used in self-supporting wire windings.

Polyvinylformal wire enamels suitable for heavy round and rectangular conductors with high mechanical stability, excellent adherence to copper and resistance to transformer oil.

Voltron® wire enamels developed for use in inverter driven motors offer superior long-term resistance to corona.

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DuPont is the world’s only manufacturer of electrical insulation materials with product lines of papers, films, plastics and liquids

DuPont are known for their high standard not only regarding innovation and quality for their products, but also concerning responsibility for staff and environment.

Through permanent investment in production-integrated

environmental protection concepts over the past years,

DuPont have succeeded in reducing waste and emissions

while at the same time considerably increasing the

production output.

As early as 1991 DuPont were granted the worldwide recognized environmental standard DIN ISO 14001

The repeated re-certification reflects the official acknowl-

edgment by independent experts of the DuPont imple-

mented strategy of sustainable environmental management.

Furthermore health and safety are the other two important

pillars of the company’s core values.

DuPontTM Responsible Care

The original idea comes from nature and we have taken it to perfection.

In former times natural resins used to serve as basic components in the wire enamel production. Nowadays DuPont refrain from using this natural substance and manufacture the DuPontTM Voltatex® wire enamels through complex chemical processes, which represents another example of the preservation of natural resources.

The information provided herein corresponds to our knowledge on the subject at the date of its publication. This information may be subject to revision as new knowledge and experience becomes available. The data provided fall within the normal range of product properties and relate only to the specific material designated; these data may not be valid for such material used in combination with any other materials or additives or in any process, unless expressly indicated otherwise. The data provided should not be used to establish specification limits or used alone as the basis of design; they are not intended to substitute for any testing you may need to conduct to determine for yourself the suitability of a specific material for your particular purposes. Since DuPont cannot anticipate all variations in actual end-use conditions DuPont makes no warranties and assumes no liability in connection with any use of this information. Nothing in this publication is to be considered as a license to operate under or a recommendation to infringe any patent rights.

© 2008 DuPont. All rights reserved. The DuPont Oval Logo, DuPontTM, The miracles of scienceTM and Voltatex® are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

DuPont Performance Coatings GmbHChristbusch 2542285 Wuppertal, GermanyTel: +49 (0)2 02 - 529 -0Fax: +49 (0)2 02 - 529 -28 00

www.Voltatex.dupont.com

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