Sichuan Dongfang Insulating Material Co., Ltd. >> Prepreg. of Nmn

Prepreg. of Nmn

Prepreg. of Nmn
Price: US $ 29.8kg
Min Order: 50kg
Pay Type: L/C,T/T,D/P,Western Union
Prod Model: D283
Max. Width: 900mm-1800mm
Thickness: 0.18mm - 0.50mm
Application: Dry Transformer Coil Insulation
Type: Insulation Film
Chemistry: Hybrid Insulation
Thermal Rating: H 180
Maximum Voltage: 10KV~20KV
Material: Polyaramid Paper/Polyester Film
Certification: ISO14001, Ohsas18001, ISO10012, Cnas
Color: Natural Color
Brand: Dongfang

Product Description

D283 Prepreg. of Nomex paper / polyester film flexible laminates (NMN).  NMN is  a B-stage material in which NMN is coated with special heat-resistant resin, then followed by baking process. It has the characteristics of short curing time and long storage life under room temperature. After being cured, D283 has excellent electrical properties, good adhesive and heat resistance.

D283 is used in Class-H dry-type transformers as layer insulation of low-voltage copper/ aluminum foil windings, also as well as slot insulation and interturn insulation in Class F and H electric motors or electric appliances. 

1 Technical requirements
1.1 Appearance
Its surface should be flat, free of uneven resin and impurities affecting performances. While being de-coiled, its surface shall not conglutinate each other. Free of defects such as creases, bubbles and wrinkles.
1.2 Dimension
D283 is supplied in roll, roll length is not less than 50 meters, roll weight is less than 60kg. The splices shall not be more than 2 in each roll and the length for each section shall not be less than 5 meters. 
The recommended nominal width is 900mm. As per user¡s requirement, we can also supply D283 in tapes with different width (width tolerance: +/-1.0mm ).



2 Test method
2.1. The test for dissolvable resin content, volatile content and shear strength under tension shall be as per the relevant stipulations in Chapter 4 of Standard Q/DSJ-375-201.
2.2 The other items shall be as per the relevant stipulations in Test Method for Electrical Insulating Flexible Laminates , GB 5591.2-2002.


3 Transporting and Storage
3.1 The storage life is 6 months at temperature of below 20ºC after leaving factory. If the storage duration is over 6 months, the product can still be used when being tested to be qualified. The product should be put and / or stored upright and keep away from fire, heat and direct sunshine.
3.2 The other requirements shall accord with the stipulations in Electrical insulating flexible laminate and general definition, GB5591.1  2002.


Sichuan Dongfang Insulating Material Co., Ltd. ( Dongfang for short ) is the key subsidiary company of Sichuan EM Technology Co., Ltd. ( EMT for short ). EMT is a public company which specializes in R&D, manufacturing and selling chemical new materials. It devotes itself in providing safe and environment-friendly new material solution to create an even better life for society.

EMT headquarter, which owns 9 subsidiaries, locates in Sichuan Mianyang City, Sichuan Province. The company sticks to the developing principle of "Technology Supports Enterprise, Hard Work Promotes Industry". By relying on National Insulation Material Engineering Center, National Technology Center and Post-Doctoral Research Center as well as depending a high-quality R&D team which consists of doctors and masters, EMT sticks to the self-development road and prioritizes in developing insulation film, optical film, new insulation material products, environment-friendly FR material and fine chemicals. The company can provide service for various industries including new energy, smart power grids, consumer electronics, panel display, electrical engineering and electric apparatus and military projects. With excellent performance and good reputation, EMT exports to over 40 countries and regions and has established long-term stable cooperation with many enterprises.

By sticking to the development road of systematic innovation, relevance technology, diversified products and professional service, EMT is on the way to a global supplier in new material industry.

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