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DMD Epoxy Pre-impregnated Material

DMD Epoxy Pre-impregnated Material

Pre-impregnated Material DMD(Class F)formed in the process of precuring the modified F-class DMD with impregnation of Hi-temp resistant Epoxy resin into B-stage by baking.

Features:

1.It is Class F(155°C)insulating material.

2.This product has long shelf life at room temperature,low precuring temperature and time,showing excellent electrical insulation, bonding and heat-resistant properties.

3. Thickness: 0.15-0.40mm, Width: 1000mm; Nominal weight: 50±5kg/roll.

Advantage:

It has excellent electrical properties, good adhesion and heat resistance.

Application:

It is used for liner insulation of copper foil (aluminum foil) low voltage coils in dry-type transformer and slot insulation and interphase insulation in B~F class motors and electrical appliances.

Packing and storage:

1. Packing: It should be wrapped with plastic film then put in clean&dry carton.    

2. The storage life is 6 months at temperature of below 25℃ after leaving factory, the product should be put and store upright and keep away from fire, heat and direct sunshine.

 

Properties

 Units

                                              Values


Nominal thickness

 mm

 0.15

  0.18

  0.2

 0.23

 0.25

  0.3

  0.35

0.4   

0.45  


Tolerance

 mm

±0.02

±0.025

±0.03

±0.03

±0.03

±0.03

±0.035

±0.040

±0.045


Thickness of film

 mm

 0.05

  0.05

 0.05

  0.1

  0.1

 0.15

  0.188

0.25  

0.25  


Tensile Strength(no bending)

 mm

    ≥70

       ≥80

            ≥100


Resin content

  %

     35±5

         30±5

      25±5

       20±5


Volatile content

  %

                              ≤1.5


Smeltable resin content

  %

                              ≥1.0


Dielectric strength

mV/m

                              ≥40


Breakdown votage

  kV

  ≥7

  ≥7

  ≥7

 ≥10

 ≥10

 ≥10

  ≥15

 ≥18

 ≥18


Tensile and shear strength

 Mpa

                              ≥3.0


Heat shrinkage rate  

Crosswise

  %

                              ≤1.0


Lengthwise

                              ≤2.0


Appearance


Soft,smooth free of any delamination impurity,damage,crack,blister.



Color


                                     Red,Brown,White


Thermal rating class

  ℃

                               ≥155