Lamtuf Plastics Ltd. - Products - Phenolic Densified Compreg Perma Wood

RESIN TREATED DENSIFIED LAMINATED WOOD – (Electrical Application)

GRADE:

DW (LD / MD / HD)

SIZE:

Standard size is 2400mm x 1200mm

STANDARD THICKNESS:

10mm to 100mm

COLOUR:

Natural Wood Colour

CONSTRUCTION:

TYPE – VI as per IS 3513 (Part-1) – Cross grain

DESCRIPTION:

This is un-impregnated Densified Wood Laminate consisting of layers of cross laminate 2mm thick natural wood veneer
treated with solvent base Phenol-Formaldehyde resin and thereafter pressed in a high press hydraulic press under specified
temperature & pressure for a fixed time called curing time depending on the thickness & cooled under pressure to relieve
the stresses and to get perfect dimensional stability and flatness to laminate.

Our Densified Laminated Wood is of good quality of beach wood veneer & PF Resin system which makes it for prefect
application up 400 kV transformer. The material is insulated in oil has temperature index of at least 105 0C continuously

APPLICATION:

Used for Coil support rings, Clamp Rings, Winding support flange, Supporting cleats, terminal boards etc. for Transformer, Generator & Switchgear application

Sl. No.	Properties	Unit	Test Condition	Specification
Sl. No.	Properties	Unit	Test Condition	DW / LD (Low Density)	DW / MD (Medium Density)	DW / HD (High Density)
1.	Density	Gm/cc	‘A’	0.9 – 1.09	1.10 – 1.20	1.25 – 1.30
2	Moisture Content & Volatile Metter	W/w (% Max)	At 1450C+/-2oC till the wt. constant	7.0	7.0	7.0
3.	Oil Absorption	W/w (%Min)	At 1050C+/-20C in oven for 72 hrs. +90+/-20C in oil for 72hrs.	9.0	6.0	4.0
4.	Tensile Strength	Mpa (Min)	‘A’	70	90	95
5.	Compressive Strength	Mpa (Min)	‘A’	160	170	180
6.	Cross Breaking (Along Grain)	Mpa (Min)	‘A’	90	112	120
7.	Cross Breaking (Across Grain)	Mpa (Min)	‘A’	70	85	90
8.	Shear Strength (Edge wise)	Mpa	A	35	40	45
9.	Electrical strength Flat wise, prep. To layers after proper oil impregnation (sample thickness 12mm)	KV (Min)	At 1050C+/-20C in oven for 72 hrs. +90+/- 20C in oil for 72 hrs.	48 KV for 60 Seconds (4 KV /mm)
10	Electrical strength Edgewise parallel to layers, after proper oil impregnation (sample thickness 25mm)	KV (Min)	At 1050C+/-20C in oven for 72 hrs. +90 +/- 20C in oil for 72 hrs.	60 KV for 60 seconds
11	Metal Detect test	--	--	No metallic particle detected
12	Effect of oil on wood
	a) Increase in acidity	mg KOH/g	------	0.1(max)	0.1(max)	0.1(max)
	b) Increase in Sludge Content	%	------	0.05(Max)	0.05(Max)	0.05(Max)