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6630-B DMD Insulation Paper
Additional Information
Type: Insulation Paper
Thickness:0.15mm-0.4mm
Width:1000mm or customized
Color: White, green, blue, and pink
Insulation Class: B class (130°C)
Application: Electrical Winding Insulation, Winding Wire Coating Insulation
6630-B DMD Insulation Paper
6630-B DMD Insulation Paper Introduction
6630 DMD insulation paper (Class B) is a high-performance, three-layer flexible composite material widely engineered for electrical motor and transformer insulation. The acronym DMD represents its structural composition: a core layer of Polyester Film bonded on both sides with Polyester Non-woven Fabric using a high-temperature, electrical-grade adhesive.
This unique combination allows the 6630 DMD insulation paper to merge the excellent dielectric strength of polyester film with the high mechanical toughness, tear resistance, and resin absorption capabilities of the non-woven fabric, making it a premier choice for global OEM motor manufacturers.
Thickness:0.15mm-0.4mm
Width:1000mm or customized
Color: White, green, blue, and pink
Insulation Class: B class (130°C)
6630-B DMD Insulation Paper Specifications
echnical Specifications | Unit | Values | |||||||||
Thickness | mm | 0.15 | 0.18 | 0.2 | 0.23 | 0.25 | 0.3 | 0.35 | 0.4 | ||
PET Film Thickness | mm | 0.05 | 0.075 | 0.5 | 0.125 | 0.15 | 0.175 | 0.20 | 0.25 | ||
Tensile Strength | MD | Not Bended | N/10 mm | ≥80 | ≥100 | ≥120 | ≥130 | ≥150 | ≥170 | ≥200 | ≥300 |
Bended | ≥80 | ≥90 | ≥105 | ≥115 | ≥130 | ≥150 | ≥180 | ≥220 | |||
TD | Not Bended | ≥80 | ≥90 | ≥105 | ≥115 | ≥130 | ≥150 | ≥180 | ≥220 | ||
Bended | ≥70 | ≥80 | ≥95 | ≥100 | ≥120 | ≥130 | ≥160 | ≥200 | |||
Break Down Voltage | Room Temperature | KV | ≥7.0 | ≥8.0 | ≥9.0 | ≥10.0 | ≥11.0 | ≥13.0 | ≥15.0 | ≥18.0 | |
Adhesive Property | Room Temperature | - | No delamination | ||||||||
155oC±2oC, Ten min | - | No delamination,blister,or adhesive flow | |||||||||
6630-B DMD Insulation Paper Features:
1. Excellent electrical properties
2. High tear, tensile, and burst strength
3. Retained flexibility
4. Physical Toughness
5. Excellent moisture and chemical resistance
Additional Material Properties:
Thermal Class: Class B (Continuous operating temperature up to 130℃).
Standard Width: 1000mm (Custom slitting available from 10mm to 1000mm).
Form of Supply: Available in master rolls, precise slit tapes, or pre-cut sheets.
Advantages for Industrial Applications
When your procurement managers evaluate motor slot insulation, 6630-B DMD stands out due to its distinct physics-chemical properties:
1. Optimal Resin Impregnation:The outer polyester non-woven layers possess high porosity, allowing complete absorption and binding of insulating varnishes during the VPI (Vacuum Pressure Impregnation) process.
2. Superior Mechanical Integrity: It features high stiffness and tensile energy absorption, ensuring the paper does not tear or puncture when inserted into motor slots via automated coil winding machines.
3. Excellent Dielectric Shielding: The core polyester film provides a flawless electrical barrier, ensuring low dielectric loss and high voltage breakdown resistance over long-term operations.
Applications of DMD Insulating Material
Where is DMD insulation paper typically utilized?
Electric Motors (Low & Medium Voltage): Serving as ideal slot insulation, phase-to-phase insulation, and liner insulation for Y-series and custom industrial motors.
Dry-Type Transformers:Used as interlayer and end-turn insulation for coils and windings.
Generators & Alternators: Acting as the primary dielectric barrier between copper windings and the stator core.
Frequently Asked Questions
Q1: What is the maximum continuous temperature that Class B DMD paper can withstand?
A: Class B DMD insulation paper is rated for a maximum continuous thermal limit of 130°C. For applications exceeding this thermal requirement (such as Class F 155°C or Class H 180°C), manufacturers typically upgrade to F-grade DMD or NMN (Nomex-Film-Nomex) composite materials.
Q2: Why is DMD paper preferred over pure polyester film for motor insulation?
A: While pure polyester film offers great dielectric strength, it lacks sufficient mechanical tear resistance and cannot absorb insulating varnishes. The non-woven fabric layers in DMD paper act as an anchor, fully absorbing the impregnation varnish, which significantly improves the heat dissipation, moisture resistance, and mechanical binding of the entire motor winding system.
Q3: Do you provide custom shapes and slit widths for DMD paper?
A: Yes. We operate advanced high-precision slitting and die-cutting machinery. We supply DMD in master rolls, slit coils tailored to specific slot widths (e.g., 20mm, 35mm), or customized pre-cut insulation gaskets based on your engineering blueprints.
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