Block board or Laminated Wood Board

Block board is a piece of wood with a plywood core and thin veneer panels on the top and bottom sides. The plywood core is made of high-quality natural wood board strips after heat treatment and the spliced ​​block boards are covered with two layers of high-quality veneers on both sides, and then pressed by cold and hot press.

A finished block board panel typically ranges in depth from about 3/8-inch to 1 3/16-inches. Block board is made for interior use, because the wood strips are glued with interior glues and the layers are hot-pressed to form a solid panel.

Construction:

Block board is made up of a core of softwood strips. The strips are placed edge to edge and sandwiched between veneers of hardwood. A single veneer on both sides is known as 3-ply. A double veneer on both sides is called 5-ply. The sandwich is then glued under high pressure.

Processing of Block board

Followings are the steps of block board processing:

  1. Material

  2. Slicing Wood / Rotary Cutting

The logs of timber are sliced at first for making the raw of blocks. Strips may be 25 mm.

For outer layer, logs are cut at rotary cutting. Thus veneer for coating is obtained.

  1. Gluing

To attach the slices glue or adhesives are used

Urea formaldehyde, Phenol formaldehyde which is called plastic resin. Exterior grade block board requires phenol formaldehyde. Gluing is done under high pressure.

  1. Drying

The blocks are dried to reduce the moisture as well as water content left inside blocks. For drying the blocks are kept before the sun. The moisture content is reduced to 10-12%. After proper drying, they are ready for making a sandwich.

  1. Attaching

Blocks are attached together used softwood or hardwood as required for interior or exterior grade required.

  1. Finishing

Final finishing giving lamination, a coating is done.

Look at the video how block board is made