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Densified Laminated Wood/Compressed Laminated Wood

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Densified laminated wood/compressed laminated wood made of high-quality birch wood after cooking, spinning, and drying, coated with special insulating glue, and then made at high temperature and pressure. Electrical laminated wood is used in transforme

Project		Unit	Index
			DLW101	DLW201		DLW202	DLW301
Appearance		-	Smooth surface, uniform color, no bubbles, no wrinkles, edge cutting neat, no stratification.
Density		g/m³	1.2-1.3	1.1-1.2		1.1-1.2	1.0-1.1
Vertical layer bending strength	A direction	MPa	≥80	≥65		≥65	≥55
	B direction		≥80	≥65		≥65	≥55
Impact strength	A direction	KJ/m2	≥15	≥13		≥13	≥10
	B direction		≥15	≥13		≥13	≥10
Interlaminar shear strength		MPa	≥9	≥8		≥8	≥7
Vertical layer electrical strength （in 90℃ transformer oil）		Kv/mm	≥9	≥8		≥7	≥7
Parallel layer break down voltage（in 90℃ transformer oil）		kv	≥50	≥50		≥50	≥50
Pollution for liquid dielectric electricity		-	≤0.1
Shrinking after dried	A direction	％	≤0.3		≤0.3	≤0.3	≤0.3
	B direction		≤0.3		≤0.3	≤0.3	≤0.3
	Vertical direction		≤3		≤3	≤3	≤3
Water content		％	≤6		≤6	≤6	≤6
Oil absorbing		％	≥5		≥8	≥8	≥10
Transformer grade	No less than 110KV		No higher tan 110KV	66-35KV	No higher than 35KV

Features of Densified Laminated Wood/Compressed Laminated Wood:

The Densified laminated wood/compressed laminated wood has the characteristics of good insulation performance, high mechanical strength and easy machining. Processing Technology of Densified Laminated Wood/Compressed Laminated Wood:

Qualified substrates-once soaked-twice soaked-rotary cutting-veneer drying-veneer cutting and repairing-gluing and assembly-pre-pressing-hot pressing. (Using low-medium adhesive, several layers of veneer, each layer of veneer is 1.2-2.2mm thick, crisscrossed by wood grain, crisscross, and parallel blank assembly, high pressure pressing.

Application of Densified Laminated Wood/Compressed Laminated Wood:

It is widely used as insulation and support materials in transformers and transformers. Its dielectric constant is close to that of transformer oil and its insulation coordination is reasonable. It can be used for a long time in a transformer at 105 ° C. Under the action of external force and strong electric field, it will not break and will not be broken down. At present, electrical laminated wood materials have been widely used at home and abroad to make insulating structural parts, such as upper and lower pressure plates, lead frames, iron yoke pads, coil insulation pressure plates, iron yoke clips, etc. It is used to make clips in transformers. It replaces steel plates, insulated cardboard, epoxy plates, and applications in this area, thereby reducing the transformer's own weight and material costs.

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Densified Laminated Wood/Compressed Laminated Wood

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