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phenolic cotton cloth laminated rod

Details£º
Product Intro
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.
Technic Requirement
1. Guise£ºsmooth£¬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£º
Dia
Tolerance
Dia
Tolerance
6¡«12
¡À0.5
£¾28¡«45
¡À1.5
£¾12¡«16
¡À0.7
£¾45¡«65
¡À2.0
£¾16¡«28
¡À1.0
£¾65¡«200
¡À2.3

3. Warp
Dia£¨mm£©
warp£¨%£©
6
£¾6¡«19
£¾19
¡Ü2.0
¡Ü1.0
¡Ü0.5
4¡¢After machining it should be without interlayer and lose. 5¡¢Physical¡¢Mechanicaland Dielectric performance
Properties Unit Grade 
Phenolic Cotton Cloth Molded Rod
3721 3723 3725
Flexural strength ¡İ MPa 118 88 83
Tensile strength ¡İ MPa 78 ¡ª ¡ª
Compressive strength (Axial)           ¡İ MPa ¡ª ¡ª 138
Breakdown voltage Parallel to laminations (in transformer oil) ¡İ kV 10
(20¡À5¡æ)
¡ª 10
(20¡À5¡æ)
Insulation resistance parallel to lamination A: Under normal conditions D-24/23£ºImmersion in water
¡İ
W
1.0¡Á108
¡ª

¡ª                   ¡ª

¡ª                   ¡ª
Density ¡¡ g/cm3 (1.25-1.40)
Water absorption rate  (D-24/23, ¦µ25©L) ¡Ü % 1.0 1.0 1.0
Flammability ¡¡ Class ¡ª ¡ª ¡ª
Color ¡¡ ¡ª Natural
Reference standard ¡¡ ¡ª Q/TXXFR004-2009