• 3020

• 3021

• 3021B

• 3021C

Phenolic Paper Laminated Sheet (1)

Properties

Unit

Grade

3020

3021

3021B

3021C

Flexural strength perpendicular to laminations

≥

MPa

120

120

90

90

Bonding strength (≥10mm in thickness)

≥

N

3600

3200

3000

2800

Insulation resistance after immersion in water (D-24/23)

≥

W

-

1.0×10⁷

-

-

Dielectric strength perpendicular to laminations

(in 90±2℃ transformer oil, 1 mm in thickness)

≥

MV/m

15.8

(E-96/105)

12.1

14

(20±5℃)

12

(20±5℃)

Breakdown voltage parallel to laminations

(in 90±2?? transformer oil)

≥

KV

35 (E-96/105)

20

12

(20±5℃)

10

(20±5℃)

Permittivity (50Hz)

≤

—

5.5

-

-

-

Permittivity (1MHz)

≤

—

-

5.5

-

-

Dissipation factor (50Hz)

≤

—

0.05

-

-

-

Dissipation factor (1MHz)

≤

—

-

0.05

-

-

Density

g/cm³

(1.3-1.4)

(1.3-1.4)

(1.30-1.45)

(1.30-1.45)

Water absorption (D-24/23, 1.6mm in tickness)

≤

mg

204

182

—

—

Color

—

Natural

Natural Chocolate

Chocolate

Chocolate

Reference standard

—

JB/T8149.1-2000

Enterprise Standard

Characteristics & Applications:

1. 3020：High voltage applications at power frequencies. High electrical strength under oil. Good electrical properties in air under normal humidity

2. 3021：Suitable for electrical and mechanical applications, good electrical properties in air under normal humidity

3. 3021B, 3021C：Economical products versus 3021, with lower properties than 3021