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Phenolic Cotton Cloth Laminated Sheet
  1. 3025

  2. 3025B

  3. 3025C

  4. 3025CS

  5. 3026

  6. 3027

  7. 3028

Phenolic Cotton Cloth Laminated Sheet

Properties

Unit

Grade

3025

3025B

3025C

3025CS

3026

3027

3028

Flexural strength perpendicular to laminations

MPa

100

90

70

70

110

90

100

Bonding strength ( ≥10mm in thickness)

N

-

5500

5500

5500

-

-

-

Impact strength parallel to laminations (Charpy)

KJ/m2

8.8

7.8

5.0

5.0

7.0

7.8

6.0

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

W

1×106

-

-

-

1×106

5×107

5×107

Dielectric strength perpendicular to laminations

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

MV/m

0.82

-

-

-

0.82

5.1

6.3

Breakdown voltage parallel to laminations

(in 90±2 transformer oil)

KV

1

-

-

-

1

18

20

Permittivity (50Hz)

-

-

-

-

-

5.5

5.5

Density

 

g/cm3

(1.30-1.40)

(1.30-1.45)

(1.30-1.45)

(1.30-1.50)

(1.30-1.40)

(1.30-1.40)

(1.30-1.40)

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

mg

220

-

-

-

220

145

145

Color

 

Natural

Black

Natural

Reference standard

 

JB/T8149.2-2000

Enterprise Standard

JB/T8149.2-2000

Characteristics & Applications:

1. 3025Mechanical applications(coarse weave), with poor electrical properties

2. 3025B, 3025C, 3025CS, 3025B and 3025C are ecomomical products versus 3025; 3025CS is suitable for abrasive-resistance parts, but not recommended to be used as insulation material

3. 3026Mechanical properties(fine weave), poor electrical properties, good machining performance

4. 3027:Mechanical and electrical applications(coarse weave), better electrical properties than other phenolic cotton cloth laminates

5. 3028:Mechanical and electrical applications(fine weave), better electrical properties than other phenolic cotton cloth laminates. Good machining performance, recommended for small parts(as in type 3026)

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