DMD Epoxy Prepreg

DMD Epoxy Prepreg is a semi-cured sheet prepreg composed of a polyester fiber nonwoven fabric (Dacron) and an epoxy resin system. This product is used in slot insulation, gasket insulation, and phase-to-phase insulation applications in motors, transformers, and electrical insulation. Compared to other similar prepregs, DMD Epoxy Prepreg has a "sandwich" composite structure: the middle polyester fiber nonwoven fabric provides mechanical strength and tear resistance, while the impregnated epoxy resin imparts dielectric properties, heat resistance, and moisture and chemical solvent resistance after curing. This structure allows the material to maintain resin flowability and low volatility during high-temperature and high-pressure curing, thus forming an insulating structure that combines mechanical protection and electrical insulation. DMD Epoxy Prepreg is suitable for insulation applications requiring Class F (155°C) or higher temperature rating certification.

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Description
Applications
Parameter

Product Features:
Electrical Properties: The cured material possesses dielectric strength, volume resistivity, and surface resistivity, preventing current breakdown.
Mechanical Properties: The polyester fiber nonwoven fabric skeleton provides the material with tensile strength and toughness, allowing it to maintain its structure during punching, bending, and assembly.
Heat Resistance: The epoxy resin system enables it to operate at 155°C (Class F) or higher, exhibiting stable thermal properties and low thermal shrinkage.
Processability: At room temperature, it is a dry sheet that can be cut and placed. Under heat and pressure, the epoxy resin melts, flows, and cures, filling irregular surfaces and bonding with the insulated material to form an insulating layer.
Chemical Resistance and Moisture Resistance: The cured insulation layer resists moisture, grease, and various chemical solvents.

About

Zhejiang Yuanda Fiberglass Mesh Co.,ltd.

Zhejiang Yuanda Fiberglass Mesh Co., Ltd. was founded in 2000. It is a technology-oriented manufacturing enterprise focusing on the new materials field, specializing in the research and development and production of composite reinforcing materials, insulating materials, and related intelligent equipment. Committed to providing professional and reliable products and services to customers worldwide. The company is located in the Yangtze River Delta economic Circle of China, close to Ningbo Port and Shanghai Port. The unique geographical location has brought convenience to the company's import and export business. The company covers an area of nearly 33,000 square meters and has modern standard workshops.
The three core business segments
1. Composite material fiber bars and fiber bar mesh sheets (GFRP), as well as supporting production equipment.
2. Special interlayer insulating materials for power transformers and motors.
Iii. Alkali-resistant fiberglass mesh fabric and alkali-resistant emulsion for construction.

For the past 25 years, Zhejiang Yuanda Fiberglass Mesh Co., Ltd. has been deeply engaged in the field of new materials, deepening technological innovation and industrial collaboration, continuously expanding the application scope of its products, and has won wide recognition from customers. In the future, we will be committed to building a leading domestic supplier of composite new materials and injecting continuous impetus into the high-quality development of the industry.

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No. 60, Yiwu East Road, Wufu Industrial Park, Yiting Town, Shangyu City, Zhejiang Province, China

+86 13606593503

0575-82419001

fiberglassmesh@163.com

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Serial number	Property	Unit	Requirement
1	Nominal thickness	mm	0.15	0.18	0.2	0.25	0.3	0.4
2	Allowable thickness deviation	mm	±0.02		±0.03			±0.04
3	Tensile strength (longitudinal, no bending)	N/10mm	≥70		≥80			≥100
4	Soluble resin content	g/m²	≥45		≥45			≥45
5	Volatile content	%	≤1.5		≤1.5			≤1.5
6	Breakdown voltage	kV	≥7.0		≥8.0			≥10
7	Tensile shear strength	Mpa	≥3.0		≥3.0			≥3.0
8	Temperature index		≥155		≥155			≥155

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