Description
Plywood is produced by gluing together, in high temperature (145-150ºC) and under high pressure (6-12 MPa), beech veneers 2 mm thick bonded with special phenol-formaldehyde resin.
Structure of transformer plywood can be crossed when the grain in neighbouring layers is at right angle and parallel with the grain laid parallel in each layer.
Manufacturing process
After being cut to size, each individual piece of veneer is impregnated with phenolic resin in a vacuum autoclave. Following impregnation, the pieces of veneer are baked in an oven to achieve a "B-stage" (partially cured) condition. The next step is to arrange and to stack the veneers to the desired configuration and thickness. Lamination, densification and complete curing are accomplished simultaneously in specially designed hot press machine.
We process all common grades of synthetic resin-compressed wood according to DIN 7707, IEC 61061 using constituents such as selected peeled veneers of beech and special synthetic resins. By impregnation or pressing under high pressure and temperature, a homogenous material is created with excellent technical properties. Different product qualities can be achieved by varying the material structure, resinification and compaction.
Features and Appearance Quality
Excellent dielectric and mechanical properties
Applications
it is widely used for production of power transformers.
Standard sizes
1500 x 1000 mm
1000 x 1500 mm
2000 x 1000 mm
customized sizes and shapes are welcomed.
About us
We are Kangliyuan Science& Trchnology (Tianjin) Co,.Ltd, is a high-tech insluation material enterprise in China. We produce insulation materials for oil-immersed transformers, dry type transformer, motors, explosion-proof appliances, as well as complete sets of equipment, high&low voltage electrical appliances and other electrical control fields.
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