Zhongtian Group

Chinese Manufacturer

Phenoilc Cotton Cloth Board/Bakelite Hylam Sheet/Tufnol Sheet

3027 Phenolic Laminated Cotton Sheet Standard: GB/T 1303.6-2009 / IEC60893-2:2003 This product use cotton impregnated with phenolic resin and formed by hot pressing, It has strong mechanical and electrical properties.Heat resistance class is E.
Parameter

No.

Project

Unit

3021

3025

3025—A

3026

3027

3241

1

Appearance

-

Smooth surface, uniform color, no bubbles, no wrinkles, edge cutting neat, no stratification.

2

Density

g/m³

1.25~1.4

1.3~1.4

1.75-1.90

3

Vertical layer bending strength(normality)

MPa

≥120

≥100

≥90

≥110

≥125

≥300

4

Tensile strength

MPa

≥100

≥80

5

Parallel impact strength

(Simply supported beam)

KJ/m2

-

≥7.8

≥50

6

Parallel layer shear strength

MPa

≥10

≥25

≥25

≥20

≥25

≥30

7

Adhesive strength

N

≥3600

-

8

Electrical strength

Vertical layer(in 90℃transformer oil )( thickness 1mm )

Kv/mm

≥15.8

≥5.1

≥5.1

≥5.1

≥5.1

≥8.0

Parallel layer breakdown voltage(in 90℃transformer oil )

kv

≥35

≥20

≥35

9

Insulation resistance after water immersion

Ω

-

≥5*107

≥1.0*108

10

Dielectric constant(1MHz)

-

≤5.5

11

PTI

-

≥100

-

12

Water absorbing ( thickness 1-20mm)

mg

180~970

206~406

136~277

64-193

 

Name

IEC name

Property

3025

PFCC201

Course cotton,Mechanical, electrical performance in general.

3025-A

PFCC202

Media-fine cotton,strong mechanical and electrical performance .

3026

PFCC203

Fine cotton,stronger mechanical and electrical performance.

3027

PFCC305

Electrical use fine cotton,higher mechanical electric and dielectric performance.
Note: Due to continuous product improvement, the dimensions provided in this sample are for reference only. If necessary, our company can design and produce according to user requirements. Please contact the company in time.

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