FINGER JOINTED LAMINATED BOARDS

Finger Jointed Laminated Boards - A Solid Solution

Finger Jointed Laminated Boards offer a solution to the increasing shortage of solid timber panels. The timber is kiln dried to a moisture content below 10%, planed and ripped to thinner strips. These strips are finger jointed after colour matching to the desired lengths and then edge coated with special resins which can withstand boiling water tests. The coated strips are edge laminated applying pressure from the sides AND top in a composer press to form panels. These panels are sanded to produce finished solid lumber panels. Machining these panels can be done exactly the way solid lumber is machined.

Its Uses

Finger Jointed Laminated Boards can be used to make joinery material, beams, table tops, parquet flooring and for other panel applications.

Its Specifications

The Rubberwood for production of Finger Jointed Laminated Boards is pressure impregnated with Boric-Borax, Parachem Anti-Bacterial Chemicals, Kiln dried & and normalised. The grade specification is applicable to 1 face & 2 edges and the other face will have the specification with minor defects of the next lower grade.

The Resins for edge gluing & Finger Jointing are polymers (PVAC, PU Combinations) which are either white or translucent. The glue joints are designed to withstand delamination tests conducted after boiling. The depth of chemical impregnation is usually above 70% and is measured by reagents. The toxicity level of the product is low and within allowable limits.

The maximum dimensions of panels are: Length 6000mm, Width 1200mm, Thickness 60mm.

Grade	Colour	Finish	Moisture content	Warpage	Structure	Attributes	Size Tolerances
							Thickness	Width	Length
A	Uniform and evenly matched	Sanded smooth	Below 10’%	2mm in 1000mm length	Finger Jointed & Edge Glued. Minimum length of Lamina except end Lamina is 200mm.	Free of knots, blue stains, end & surface cracks, tapping marks, mineral & starch streaks, torn off fingers.	+0.5mm	+1.0mm	+10.0mm
A/B	Mixed colour by natural variation or Sap / Heartwood variation	Sanded smooth	Below 10%	2.0mm in 1000mm length	Finger Jointed & Edge Glued. Minimum length of Lamina except end Lamina is 200mm.	Combination of A & B grades	±0.5mm	±1.0mm	+10.0mm
B	Mixed colour by natural variation or Sap / Heartwood variation	Sanded smooth	Below 10%	2.0 mm in 1000mm length	Finger Jointed & Edge Glued. Minimum length of Lamina except end Lamina is 200mm.	Free of knots above 20mm dia, pin holes, end cracks, mineral & starch streaks. allowance of blue stain upto 3% of surface area. Tapping marks not more than a total length of 150mm in 1 sq metre surface area.	+0.5mm	+1.0mm	±5.0mm
B/C	Mixed colour and limited blue stain, uneven variation	Sanded smooth	Below 10%	3.0mm in 1000mm length	Finger Jointed & Edge Glued. Minimum length of Lamina except end Lamina is 200mm.	Combination of B & C grades	±0.7mm	±1.0mm	±5.0mm
C	Mixed colour, blue stain & uneven matching allowed	Sand finish	Below 10%	3.0mm in 1000mm length	Finger Jointed & Edge Glued with no specific Lamina length & variations in Lamina width.	Allowance of knots, blue stains, pinholes, light cracks & tapping marks, mineral & strach streaks, structurally safe finger cracks.	±0.7mm	±1.0mm	±5.0mm