Strata wood

Strata wood

详细说明

 

StrataWood material, is a press laminated wood in crosswise direction, based on high quality and selected beech veneers, stick together with a Electrical thermosetting synthetic resins under high pressure and temperature.

 

The most important characteristics of the StrataWood , are:

      ●Good Electrical properties

      ●Excellent absorption of transformer oil

      ●High mechanical strength

      ●Low and high temperature resistance

      ●Good resistance to the abrasion and wear

 

Due to the characteristics of the product , StrataWood is mainly use in the electrical oil transformers applications as high electrical insulation material as pressure beams, step blocks, pressure spare parts, top and bottom support coils, potential rings, pressure rings , spacers, etc.  For his mechanical strength, Strata Wood can be also use for many applications as abrasion resistance material under stress.

 

Standard Range of Production

The StrataWood is produced in 3 different densities,

 



Type : PWL-0 : Low Density ,         0.90 ~1.10 g/cm3 

Type : PWL-1:  Medium Density,   1.10 ~ 1.20 g/m3

Type : PWL-2:  High Density ,          1.20 ~1.30 g/cm3




The lamination is made on crosswise veneers , and the standard thickness of the veneer is 2 mm. Under specification we can produce from 1 mm , 1,2 mm and 1,5 mm thickness veneer too.

For non electrical application and according specific requirements , we can produce in a sheets on parallel veneer.

 

Thickness : 10 mm to 100 mm

 

Standard Sheet Sizes

1000  x  2000mm  

1000  x  1500mm  

1500  x  1500mm,

1500  x  3000mm,

3000  x  3000mm  

3000  x  4200mm

 

We can machine any kind of pieces produced with C.N.C equipments with sizes according sheets availability according costumers drawings.


DATA SHEET    StrataWood


PHYSICAL PROPERTIES

TYPE

PWL-0

PWL-1

PWL-2


Unit

Crosswise

Crosswise

Crosswise

Density

g/cm3

0.90 ~ 1.10

1.10 ~1.20

>1.20 ~ 1.30

Moisture

%

≤ 7

≤ 7

≤ 7

Shrink Ratio after dried

%

≤ 1.5

≤ 1.5

≤ 1.5

Oil Absorption

%

>20

>15

>7

Inter-reaction with transformer oil


Very Good

Very Good

Very Good

Mechanical Properties

Tensile Strength                           

Parallel to the layers

Mpa

≥ 50

≥ 55

≥ 80

Compressive Strength

Parallel to the layers  

Vertical to the layers  

 

Mpa

Mpa

 

≥ 50

≥120

 

≥ 65

≥130

 

≥ 100

≥150

Interlaminar shear strength

Mpa

≥6

≥7

≥7

Flexural Strength

Parallel to the layers   

Vertical to the layers   

 

Mpa

Mpa

 

≥ 100

≥100

 

≥ 115

≥ 115

 

≥ 120

≥120

Module of elasticity in flexure      

Parallel to the layers

Mpa

≥7000

≥8000

≥10000

Electrical  Properties

Insulation Resistance

MΏ*m

≥108

≥108

≥108

Electrical Strength

(Intransformeroil

at 20ºC Vertical                    

at 20ºC Surface

at 90ºC Vertical

at 90ºC Surface

MV/m kV/25 mm

MV/m kV/25 mm

 

 

≥ 9

≥ 60

≥ 10

≥ 50

 

 

≥ 9

≥ 60

≥ 10

≥ 50

≥ 9

≥ 60

≥ 10

≥ 50

Dielectric Loss Factor at 50 Hz        

at 20ºC

at 90ºC


 

≤ 0.02

≤ 0.13

 

≤ 0.02

≤ 0.13

 

≤ 0.02

≤ 0.13

Comparative dielectric constant        

at 20ºC

at 90ºC


 

≤ 3.0

 ≤ 3.6

 

≤ 3.0

≤ 3.6

 

≤ 3.0

≤ 3.6


Laminated machine:


Package and loading:






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