Brief Introduction of Insulating Film Composite Product

Composite products are also known as flexible composite materials. The flexible composite materials for electrical applications are mostly made of polyester film, polyimide film, natural fiber insulation paper and synthetic fiber insulation paper, ……

Composite products are also known as flexible composite materials. The flexible composite materials for electrical applications are mostly made of polyester film, polyimide film, natural fiber insulation paper and synthetic fiber insulation paper, which are impregnated and pressed. The composite material has the comprehensive properties of the film material and the fiber material, and obviously improves the tear resistance and impregnation property of the insulating material, and has better performance than a single material, and is convenient to use. Its products mainly include polyester film insulation paper composite material, polyester film polyester fiber paper composite material, polyester film aramid fiber paper composite material and polyimide film aramid fiber paper composite material.

(1) Polyester film insulation paper composite material

A layer of polyester film with a thickness of 25um, 36um, 50um and a layer of insulating paper (green paper) are bonded with a binder, and the thickness is 0.1-0.6 mm. The flexible composite material has good electrical properties, high mechanical properties, good tear resistance and certain stiffness. It is mainly used for E-class motor slot insulation and end insulation, and the long-term working temperature is 120 °C.

(2) Polyester film polyester fiber paper composite material(DMD)

It is made of polyester fiber paper with a thickness of 50um, 70um and 100um and a layer of polyester film. The thickness is 0.1-0.45 mm. The composite material has good electrical and mechanical properties, excellent tear resistance and good impregnation. It’s mainly used for Class B or Class F motor slot insulation and end insulation, and long-term operating temperature is 130 ° C or 155 ° C.

(3) Polyester film aramid fiber paper composite material(NMN)

Electrical Insulation Material Class H 6650 Flexible Laminate NHN

It is made of two layers of aramid fiber paper and a layer of polyester film with thickness of 25um, 30um and 50um, and the thickness is 0.2-0.53mm. The properties of this material are similar with polyester film polyester fiber paper. Its heat resistance is good, and the compatibility with the insulating paint is good. It’s mainly used as Class F motor slot insulation and end insulation.

(4) Polyimide film polyaramid fiber paper composite material(NHN)

insulation paper

The material is made of polyimide film with aramid fiber paper on both sides, and has thicknesses of 0.2 mm, 0.23 mm, 0.3 mm, and 0.33 mm. This composite material has excellent electrical, mechanical properties and heat resistance. It is mainly used for H-class motor insulation and dry-type transformer insulation. The long-term operating temperature is 180 °C.

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