DMD (Dacron/Mylar/Dacron) Paper – Class F

• Economical type of electrical insulation material for medium temperature machines.
• Made from Polyester Film with a polyester fleece on both sides.
• Excellent electrical and mechanical properties with a smooth surface finish.
• Available in a selection of thicknesses by the roll, linear metre or a custom cut tapes and parts.

Used for electrical insulation, DMD Composite Paper is economical and versatile. This material is made from a single layer of polyester film that is coated on both sides with polyester felt. This three-layer constructions ensures the material offers good mechanical and dielectric strength while still being able to be impregnated by insulating varnishes.

DMD Electrical Insulation Paper is available in a selection of thicknesses. More information on these as well as it’s performance traits and benefits, is provided below:

Excellent Electrical Insulation Properties.

DMD’s construction ensures it provides good electrical strength. Specific breakdown voltage ratings vary depending on overall thickness and are summarised in the table below:

Good Mechanical Strength.

In addition to its solid electrical properties, DMD is a strong yet flexible insulation paper material. It will withstand temperatures up to 155°C (Class F) and exhibits no delamination of the layers when tested at this temperature for 10 minutes. Strength ratings for various thicknesses are included below:

In addition to its excellent strength, DMD is also very easy to work with. The fleece layers on either side of the poly film are sealed with a light coating of varnish. This ensures that the material has a smooth surface finish and won’t catch if applied with machine taping systems.

Application

DMD is typically used on low and medium voltage electric machines. Specific applications include:

• Slot liner for electric motors.
• Phase insulation.
• Interlayer insulation material for transformers.