Strata wood

詳細說明

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	M?*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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Strata wood

Hangzhou Times industry material co.,ltd.

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