6641 Fdmd Double Side Polyester Nonwoven Clamp Insulation Paper Motor Insulation

• Customization: Available
• Application: Motor, Transformer
• Color: White, Green, Red
• Model NO.: FDMD Insulation Paper
• Material: Polyester Film & Polyester Nonwoven Composite
• Maximum Voltage: 4kv ~ 18kv
• Thermal Rating: Class F 155 Celsius
• Thickness: 0.13 mm to 0.40 mm
• Width: 10 - 1200 mm
• Implementation Standard: IEC 60626
• Applicable Equipment: Low Voltage Motor, Transformer, Electric Apparatus
• Thermal Bonding Test: No Delamination, No Blister, No Glue Flow
• Feature: Flexible, Easy Cutting and Winding
• Structure Type: Three-Layer Flexible Composite Laminate
• Surface Mass: 110 G/M2 to 440 G/M2
• Elongation Performance: Good Elongation After Bending
• Tensile Strength: Excellent
• Transport Package: Carton
• Specification: 1000mm
• Trademark: Zhonghao
• Origin: Xuchang, Henan, China
• HS Code: 3921909090
• Production Capacity: 500000kg
• Package Size: 100.00cm * 33.00cm * 33.00cm
• Package Gross Weight: 60.000kg

Product Description

Production name	6641 FDMD Class F Composite Electrical Insulation Material   Class F 155℃ DMD Insulation Paper 6641 FDMD Polyester Film Non-woven Composite
Material	6641 FDMD is a three-layer flexible electrical composite insulation material with D-M-D structure. It consists of two outer layers of high-density polyester fiber non-woven fabric and one core layer of electrical-grade 6020 PET polyester film, bonded with acid-free Class F high-temperature adhesive. With uniform lamination texture and stable integrated performance, it is specially customized for Class F high-temperature electrical insulation applications.
Color	Pink, green, white, blue, customizable colors available
Usage	1.Slot, turn-to-turn and phase insulation for Class F motors, servo motors and power tools 2.Interlayer & end padding insulation for dry-type transformers and small power transformers 2.Winding isolation insulation for electrical coils, rectifiers and excitation equipment 4.Insulation lining for household electrical appliances and low-voltage electrical devices
Feature	1.Class F heat resistance, long-term working temperature up to 155℃, stable performance under short-time 180℃ overload 2.Excellent dielectric strength and low dielectric loss, reliable electrical insulation performance 3.Great flexibility, high tear resistance and abrasion resistance, not easy to crack during winding processing 4.Superior varnish impregnability, closely bonded with coils after dipping and curing 5.Acid-free adhesive, RoHS & REACH compliant, non-toxic and eco-friendly, easy to slit and cut into custom sizes
Advantage	1.Offers the excellent insulation performance of Class F materials at a more competitive price point compared to higher-grade alternatives, providing great value for money. 2.Complies with international electrical safety standards, effectively preventing short circuits and electrical breakdowns, thus ensuring the safe and reliable operation of electrical equipment. 3.Optimized for ease of processing, it can be quickly and accurately cut, slit, and formed, significantly reducing material waste and shortening the overall manufacturing cycle.
Sample provide	1. We send sample  A4 paper size for free 2. Customer shall bear the freight charges 3. Sample and freight charge just a show of your sincerity 4. All sample related cost shall be returned after first deal 5. It is workable to most of our clients Thanks for cooperation

Features

6641 FDMD is a high-performance Class F flexible composite electrical insulation material compliant with GB/T 5591 and IEC 60626 standards. It features a classic D-M-D three-layer structure, composed of double-layer polyester non-woven fabric and intermediate electrical-grade PET polyester film, laminated with acid-free high-temperature resistant adhesive.
With a 155°C long-term heat resistance rating, this material delivers excellent dielectric strength and low dielectric loss, ensuring stable insulation performance without delamination or blistering under high-temperature and heavy-load conditions. It boasts superior flexibility, tear resistance and varnish permeability, fitting perfectly with coil windings after varnish curing to enhance equipment insulation stability and service life.
Eco-friendly and RoHS & REACH compliant, 6641 FDMD supports customized sizes, colors and cutting styles. It is widely used for slot, turn-to-turn and interlayer insulation of F-class motors, servo motors, power tools and dry-type transformers, serving as a cost-effective insulation solution for global electrical manufacturing.

NO.	Item		Unit	Normalvalue
1	Nominal thickness		mmm	0.15	0.20	0.25	0.30	0.35
2	tolerance		mmm	±0.02	±0.03	±0.03	±0.03	±0.035
3	MD	No bending	N/10mm	≥80	≥105	≥130	≥150	≥180
		After bending		≥70	≥95	≥120	≥130	≥160
	TD	No bending		≥80	≥120	≥150	≥170	≥200
		After bending		≥80	≥105	≥130	≥150	≥180
4	Elongation	MD no bending	%	≥10	≥10	≥10	≥10	≥10
		TD no bending		≥15	≥15	≥15	≥15	≥15
5	Breakdown voltage	Normal	kV	≥6	≥8	≥11	≥13	≥16
		After bending		≥6	≥8	≥11	≥13	≥16
6	Bonding strength at room temperature		/	No delamination
7	Bonding strength at 180±2°C for 10min		/	No delamination,blister and drainage

Product Description

Excellent Dielectric Strength

Middle PET film provides high breakdown voltage and low dielectric loss, reliable insulation for low & medium voltage winding systems.

Superior Varnish Impregnability

Fibrous non-woven surface fully absorbs insulating varnish, forming tight integration with copper coils after curing to upgrade overall insulation lifespan.

Class F Heat Resistance (155℃ Continuous)

Stable performance under long-term 155℃ operation; no delamination, blistering or glue overflow at 180℃ short-time overload, perfectly fit high-load motors and dry transformers.