3248 Epoxy Glass Fibre Fabric


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Product Features

3248 board is a plate-like laminate product made of F-grade epoxy resin as the base material, coupling agent-treated alkali-free glass fiber cloth as the reinforcing material, and hot-pressed. It has high mechanical retention under the F-grade temperature condition. Strength, excellent dielectric properties in humid environments. The products have passed the inspection of the Quality Supervision and Inspection Center of Mechanical Industry Electrical Materials Products.

Product Usage

3248 epoxy glass fiber cloth laminate is suitable for high-quality insulating structural parts in large generator sets, motors, and electrical equipment under F-level conditions, and has excellent electrical properties especially in humid environments and transformer oil.

Product specifications and physical properties

1. Nominal thickness and tolerance: 0.2, 0.3 ± 0.07mm; 55.0, 60.0 ± 2.5mm; 70.0, 80.0 ± 2.8mm; 0.5 ~ 50.0mm thickness of each specification are implemented in accordance with GB/T1303.1-1998.

2. Nominal area: 2000±020mm×1000±020mm.

3. Main technical indicators (execute Q/20520497-1 018-2003):

Serial number

Test items

unit

Claim

Test results

1

density

g/cm3

1.7~1.9

1.78

2

Water absorption

mg

≤23

15.9

 

3

Vertical layer bending strength (longitudinal)

normal

MPa

≥360

464

155℃±2℃

≥180

308

4

Vertical layer to simply supported beam notch impact resistance
(Vertical)

KJ/m2

≥37

68

5

Tensile strength (longitudinal)

MPa

≥300

366

6

Bonding strength

N

≥6600

7974

7

Vertical layer direction electric strength (90℃±2℃ in oil)

MV/m

≥11.8

16.0

8

Parallel layer direction breakdown voltage (90℃±2℃ in oil)

KV

≥35

 

36

9

Dielectric loss factor (50Hz)

≤0.04

0.034

10

Relative permittivity (50Hz)

≤5.5

4.9

 

11

Volume resistivity

normal

Ω•m

≥1.0×1010

1.4×1012

155℃±2℃

≥1.0×108

3.2×108

After 24h soaking in water

≥5.0×108

4.0×109

12

Surface resistivity

Ω

≥1.0×1011

1.5×1011

13

Comparative Tracking Index

V

CTI425-<0.1

 

  Sales Manager: Chang Qing 13881068449

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