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3721 phenolic cotton cloth laminated rod
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3721 phenolic cotton cloth laminated rod 
Detail
Code: 3721 Series: rod
Spec: 0.8-40mm Material: phenolic
Color: maroon Brand: 睿源

3721 phenolic cotton cloth laminated rod

The products are made of cotton which dipped into the phenolic aldehyde resin then heat pressed by mould.With high mechanical properties and processing properties.heat-resisting grade is E. It is Suitable for electrical equipment of insulation structure parts and transformer.

According to the properties ,they can be divided into three kinds:

3721,3723,3725,3721 is better than 3723< in>   mechanical strength; 3723is an economical product versus 3721 ,3725 Similar to NEMA grade LE.

2,Technic Requirement

1. Guise:smooth,no air bubble,no oil stain& impurity,allow have inequality color, scrap,a little not level which does not interferethe usage;Diameter exceed 25mm,allow have crack which does not interferethe usage

2,Size:

Dia

Tolerance

Dia

Tolerance

6~12

±0.5

>28~45

±1.5

>12~16

±0.7

>45~65

±2.0

>16~28

±1.0

>65~200

±2.3

3. Warp

Dia(mm)

warp(%)

6

>6~19

>19

≤2.0

≤1.0

≤0.5

4,After machining it should be without interlayer and lose.

5,Physical,Mechanical and Dielectric performance

Properties

Unit

Grade

Phenolic Cotton Cloth Molded Rod

3721

3723

3725

Flexural strength

>=

MPa

118

88

83

Tensile strength

>=

MPa

78

Compressive strength

(Axial)         

>=

MPa

138

Breakdown voltage

Parallel to laminations

(in transformer oil)

>=

kV

10
(20±<5°C>)

10
(20<5°C>)

Insulation resistance

parallel to lamination

A: Under normal

conditions

D-24/23:Immersion

in water


W


1.0×108


—                   —


—                   —

Density


g/cm3

(1.25-1.40)

Water absorption rate

(D-24/23, Φ25mm)

<=

%

1.0

1.0

1.0

Flammability


Class

Color


Natural

Reference standard


Q/TXXFR004-2009