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3721酚醛层压布棒

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特性/Features
玻璃化温度130℃  B级        
TG130℃  B Class 
主要特性/General properties

序号No.

    Item 

  Unit

   Specified Value 

典型值  Typical Value

1

密度  Density

g/cm3

≥1.25

1.28

2

吸水率 Water Absorption

%

≤1.0(直径25mm(Diameter 25mm)

0.6

3

弯曲强度 Flexural Strength

MPa

≥118

128

4

拉(la)伸强度 Tensile strength

MPa

≥80

91

5

平行(xing)层向绝缘电阻(zu) Parallel to layer Insulation Resistance 

Ω

≥1.0×108

3.5×109

6

平行(xing)层(ceng)向击穿电压(ya)   20±2变压器油中Parallel to layer direction Breakdown Voltage 20±2 in transformer oil )

kV

≥10.0

12

外观
表面应光滑,无气泡、油污及杂质,允许有不影响使用的轻微树脂积胶和斑痕;两端须切割整齐,端头不得有裂纹;棒的接缝线宽度应符合如下规定:直径15mm及以下者不得超过2mm,直径15mm至60mm者不得超过3mm,直径60mm以上者不得超过4mm。
Appearance: the surface should be smooth, no bubbles, wrinkles. no obvious scratch marks. Both ends should be cut neatly . The seam line on the rod should meet the following  requirement :
Diameter under 15mm:≤ 2mm   
Diameter 15mm-60mm :≤3mm 
Diameter over 60mm : ≤4mm 
 直径偏差:Diameter Tolerance :                                  翘曲度:Warpage :

标称(cheng)直径 Nominal Diameter

偏(pian)      Tolerance 

812

±0.5

>1216

±0.7

>1628

±1.0

>2845

±1.5

>4565

±2.0

>65100

±2.3



应用领域/Application
3721酚(fen)醛层压布棒是用棉布浸以酚(fen)醛树(shu)脂,经成型模具(ju)热压而成,其截面呈圆形。
3721棒具有(you)较高的机械强度(du),适用于(yu)电器设备(bei)中作绝(jue)缘(yuan)结(jie)构零(ling)部件,并可变压器油(you)中使用。
3721 phenolic  laminated cloth rod is made of  cotton cloth dipped in phenolic resin, and then hot press by molding ,and the section is round .
The main properties of 3721 rod are as below: High mechanical strength , suitable for insulation component in electrical equipment and transformer oil .