Dolph’s® offers a wide range of impregnation resins. These products are, specially designed to fulfill the most demanding conditions of the electrical insulation and electronic protection markets.

Dolph’s® offers a wide range of two-component potting resins. These products are specially designed to meet the most demanding conditions of the electrical insulation and electronic protection markets.

Pigmented coatings are used on motors, generators and transformers to improve protection against humidity and chemicals. Coating also improves the anti-tracking properties of electrical parts. Coatings are available in a variety of different spray cans.

The multilayer laminates from Von Roll are manufactured by laminating aramid paper (e.g. Nomex®) with polyester or polyimide films, coupling polyester fleece with polyester film as well as by laminating other materials.

In addition to individual products and system solutions, Von Roll Dolph’s® also offers consulting and testing services. From tests on individual products or objects to the recommendation and qualification of complete insulation systems in the sectors of low and high voltage, electronic and electrical applications across all industries. We are globally represented on all continents with our laboratories and test facilities.

Products

Flexible Electrical Insulation

Flexible electrical laminates

The multilayer laminates from Von Roll are manufactured by laminating aramid paper (e.g. Nomex^®) with polyester or polyimide films, coupling polyester fleece with polyester film as well as by laminating other materials.

The flexible laminates from Von Roll are registered under the trade names Myoflex^® and Acuflex^®.

Combining materials makes it possible to vary the characteristics and properties of laminates, and to optimize their functionality

Advantages

Ability to work under different operating temperatures
Optimized material tensile strength and stiffness
Increased resistance to breakdown voltage
Improved impregnation capacity

Applications

Von Roll flexible laminates are high-quality products used mainly for slot and phase insulation in motors as well as for insulating transformers.

Banding tapes

Polyglas^® banding tapes are B-staged resin-bonded unidirectional glass or Kevlar yarns used to band and fix parts of electrical devices to withstand mechanical stress during operation. These tapes are typically used for banding motor coils and transformer cores and coils.

Advantages

Polyglas^® tapes offer outstanding properties and performance, including:

High tensile strength
Sufficient elasticity to strongly fix the windings
Fast and easy application
Resin binder able to withstand harsh operating environments
- Temperature
- Moisture
- Chemical attack

Applications

Polyglas^® tapes are suitable for banding all kinds of motor rotor coils and overhangs; for tying cores, coils, and columns of dry and oil transformers; and for bracing and locking any form wound coils and parts.

Polyglas^® tapes are banded according to specific conditions. After banding, Polyglas^® must be cured to achieve the final properties and to form a rigid and homogeneous ring. The tension retained during the application process enables this ring to maintain the integrity of the parts throughout the life of the machine.

Flexible Electrical Insulation
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